JP6448375B2 - Folding paper container for storing viscous materials with cover paper - Google Patents

Description

  The present invention relates to a folding paper container formed by folding a sheet of paper into a box and the paper sheet, and relates to a folding paper container and a paper sheet suitable for containing a viscous material such as a hot melt adhesive. .

  For example, Patent Document 1 discloses a folding paper container. The foldable paper container is formed by folding one rectangular paper sheet, and has a box shape with an open upper surface. A release layer made of silicone is formed on one side of the paper sheet. When the paper sheet is folded, the release layer is placed on the inner surface side of the folding paper container. And a storage box is comprised by arrange | positioning and setting a some foldable paper container in the inside of the box main body made from corrugated paper.

  The storage box is used to store, for example, a hot melt adhesive. The hot melt adhesive melted by heating is filled into each folding paper container in the storage box from the nozzle. By forming the inner surface of the folding paper container with a release layer, the folding paper container can be easily peeled off when the hot melt adhesive is used.

Japanese Patent No. 5547978

  When the filling is finished, the discharge of the hot melt adhesive from the nozzle is stopped, and then the storage box is retracted from directly below the nozzle. Alternatively, the nozzle is retracted from directly above the storage box. However, since the hot-melt adhesive melted by heating has a high viscosity, the hot-melt adhesive is difficult to cut even when the discharge is stopped, and tends to be a string-like body that hangs down from the nozzle. When this string-like body adheres to the outer surface of the folding paper container or the box main body made of corrugated paper, the folding paper container and the box main body may partially adhere to each other.

  In patent document 1, although the folding | returning part (wing piece part) which folds back from the upper part of a pair of side wall of a folding-type paper container to an outer surface side is provided, the adhesion | attachment by a string-like object is prevented. The end wall orthogonal to the side wall has no folded portion, and when the outer surface of this end wall has a string-like body, it adheres to the box body.

  When such a string-like adhesion occurs, the adhesive portion must be broken when removing the folding paper container from the storage box in order to use a hot melt adhesive. Damaged. In addition, the paper powder at the time of tearing adheres to the hot melt adhesive, which may reduce the quality of the hot melt adhesive.

  Moreover, when folding a paper sheet and producing a foldable paper container, it is also assumed that the surface with a peeling layer of a paper sheet will be mistaken for the surface which does not exist. Then, since the surface without the release layer comes to the inner surface of the foldable paper container, when the hot melt adhesive is filled, the hot melt adhesive adheres to the inner surface of the foldable paper container and cannot be peeled off.

  In view of such circumstances, an object of the present invention is to prevent troubles due to sticking of a string of a filler such as a hot-melt adhesive or a mistake in the front and back of a paper sheet.

In order to solve the above problems, a folding paper container according to the present invention is a folding paper container made of a single paper sheet and formed into a box shape with an open top by folding the paper sheet. ,
The paper sheet is
A paper sheet body;
A first release layer coated on the first surface of the sheet body;
A second release layer coated on the second surface on the back side of the first surface of the sheet body;
It is provided with.

According to this foldable paper container, even if the first and second surfaces of the paper sheet are mistakenly folded, the inner surface of the foldable paper container is covered with either the first release layer or the second release layer. It can be in the state that was done. Therefore, when the folding paper container is filled with a filler such as a hot melt adhesive, it is possible to prevent the paper from becoming inseparable and to avoid a trouble due to a mistake in the front and back of the paper sheet. In other words, when making a folding paper container by folding a paper sheet, there is no need to worry about the front and back of the paper sheet. Therefore, the production of the folding paper container can be facilitated.
In addition, since the outer surface of the folding paper container is covered with the other one of the first release layer and the second release layer, the stringing body of the packing is arranged from the outer surface of the folding paper container to the box body, etc. Even if attached so as to straddle the peripheral member, the string-like body can be easily peeled off. As a result, the folding paper container and the peripheral member can be reliably separated. As a result, troubles due to adhesion of the string-like body can be prevented.

Further, the folding paper container paper sheet according to the present invention is a paper sheet that becomes a box-shaped folding paper container with an open top,
A paper sheet body;
A first release layer coated on the first surface of the sheet body;
A second release layer coated on the second surface on the back side of the first surface of the sheet body;
It is provided with.

  ADVANTAGE OF THE INVENTION According to this invention, the trouble by adhesion of the string-like body of fillers, such as a hot-melt-adhesive, and the mistake of the front and back of a paper sheet can be prevented reliably.

FIG. 1 is a plan view showing a storage box including a folding paper container according to an embodiment of the present invention in a state before filling with a hot melt adhesive. FIG. 2 is an exploded perspective view of the folding paper container and the box body of the storage box. FIG. 3 is a perspective view of the folding paper container. FIG. 4 is a plan view showing a developed paper sheet serving as the folding paper container. FIG. 5 is an enlarged cross-sectional view of a portion of the paper sheet taken along line VV in FIG. FIGS. 6A to 6K are explanatory diagrams showing a procedure for producing the folding paper container from the paper sheet. Fig.7 (a) is a top view of the hot-melt-adhesive agent filling apparatus which follows the VIIa-VIIa line | wire of the same figure (b). FIG. 2B is a front view of the hot melt adhesive filling device. Fig.8 (a) is front sectional drawing which shows the filling position periphery of the said hot-melt-adhesive filling apparatus in the state which stopped the filling of the hot-melt-adhesive. FIG. 4B is a front sectional view showing a state where the conveyance is started after FIG. FIG. 9 is an enlarged cross-sectional view showing a state in which the string-like hot melt adhesive is attached across the end wall of the folding paper container and the box body.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 and 2 show the storage box 2. The storage box 2 includes a box body 20 and a plurality of folding paper containers 30. The box body 20 is composed of paper cardboard. A cardboard partition 22 is provided in the box body 20. The interior of the box body 20 is partitioned into a plurality (for example, eight) of storage chambers 21 by the partition 22. These storage chambers 21 form two rows (a plurality of rows) in the lateral direction (left and right in FIG. 1) of the box body 20. In each row, four (plurality) of storage chambers 21 are arranged in the longitudinal direction of the box body 20 (up and down in FIG. 1).
Note that the number and arrangement of the storage chambers 21 can be modified as appropriate.

  As shown in FIG. 1, a folding paper container 30 is accommodated in each accommodation chamber 21. As shown in FIG. 3, the folding paper container 30 has a bottom 31, a pair of side walls 32, and a pair of end walls 33, and has a box shape (cubic shape or rectangular parallelepiped shape) with an open top surface. Yes. As shown in FIGS. 1 and 2, the side wall 32 is oriented along the longitudinal direction of the storage box 2, and the end wall 33 is oriented along the short direction of the storage box 2. A folded portion 34 is formed at the upper end of the side wall 32. The folded portion 34 is folded toward the outer surface side of the side wall 32. The folding portion 34 can strengthen the side wall 32 and can improve the shape retention of the folding paper container 30.

  As shown in FIG. 4, the folding paper container 30 is configured by folding a single paper sheet 40 into a box shape. As shown in FIG. 5, the paper sheet 40 includes a sheet main body 41 and release layers 51 and 52. The shape of the sheet main body 41 and the shape of the paper sheet 40 are rectangular (quadrangle), but are not limited to this, and may be a deformed polygonal shape as shown in FIG. The material of the sheet body 41 is, for example, pulp paper, and glassine paper is used here. However, the material is not limited to this, and synthetic paper, resin paper, or the like may be used.

A first release layer 51 is coated on the entire surface of the first surface 41a on the front side (upper side in FIG. 5) of the sheet body 41. A second release layer 52 is coated on the entire second surface 41b on the back side (lower side in FIG. 5) of the sheet body 41. The material of the release layers 51 and 52 is silicone resin, but is not limited thereto, and may be fluorine resin or the like. By constituting the release layers 51 and 52 with silicone resin, heat resistance can be ensured and material cost can be reduced.
In FIG. 5, the thicknesses of the sheet body 41 and the release layers 51 and 52 are exaggerated.

  Further, as shown in FIG. 2, a separate cover paper 35 is added to each folding paper container 30. The cover paper 35 is made of the same material as the paper sheet 40 and has a quadrangular shape. A release layer is provided on both sides of the cover paper 35. One side edge of the cover paper 35 is folded upward to form a knob piece 35f.

The paper sheet 40 is folded in the same procedure as that of Patent Document 1 (Japanese Patent No. 5547978), for example, so that the foldable paper container 30 is obtained.
Specifically, as shown in FIG. 4, the paper sheet 40 is pre-creased along main fold lines X2, X3, Y1, Y2, and the like.
And first, as shown to Fig.6 (a), the paper sheet 40 is folded along the upper horizontal fold line X2. At this time, the front side first surface 41a is preferably valley-folded.
Next, after folding along the left vertical fold line Y1, as shown in FIG. 6 (b), the upper part is folded into a chevron while the portion on the left side 40d side of the vertical fold line Y1 is opened outward, and the upper part is folded into a chevron. V1 is formed. Similarly, after folding once along the vertical fold line Y2 on the right side, as shown in FIG. 6 (c), the upper part is folded into a chevron while the portion on the right side 40c side of the vertical fold line Y2 is opened outward. Part V2 is formed.
Next, as shown in FIG. 6 (d), the piece H2 formed at the center is folded along the horizontal fold line X1 to form one folded portion 34.
Next, as shown in FIG.6 (e), it folds into two along the horizontal fold line X3.
Next, as shown in FIG. 6 (f), it is folded along the vertical fold line Y1, and as shown in FIG. 6 (g), the chevron V1 is pulled out to the left side so as to form a wedge-shaped triangle. Similarly, as shown in FIG. 6 (h), it is folded along the vertical fold line Y2, and as shown in FIG. 6 (i), the chevron V2 is pulled out to the right side so as to form a wedge-shaped triangle.
Next, as shown in FIG. 6 (j), the piece H1 protruding upward is folded along the horizontal fold line X4 to form another folded portion 34.
Thereby, the folded paper container 30 in the folded state is completed. Since the foldable paper container 30 is flat, it is convenient for storage and transportation.
As shown in FIG. 6 (k), by expanding the folding paper container 30 in the folded state, the folding paper container 30 becomes a box shape as shown in FIG.

  As described above, in the first stage of the folding work (FIG. 6A), the first surface 41a is valley-folded so that the first surface 41a constitutes the inner surface of the folding paper container 30, and the second surface 41b can constitute the outer surface of the folding paper container 30. Therefore, the inner surface of the folding paper container 30 is coated with the first release layer 51.

  On the other hand, it is also conceivable that the first surface 41a is mistakenly folded first (the second surface 41b is valley-folded). In that case, the second surface 41 b constitutes the inner surface of the folding paper container 30, and the first surface 41 a constitutes the outer surface of the folding paper container 30. Therefore, the inner surface of the foldable paper container 30 is coated with the second release layer 52. In short, whether or not the first surface 41a and the second surface 41b of the paper sheet 40 are mistaken, the inner surface of the foldable paper container 30 is coated with either release layer 51 or 52.

  Therefore, as will be described later, when the hot melt adhesive A (FIG. 7) or the like is filled in the foldable paper container 30, the foldable paper container 30 adheres to the hot melt adhesive A and cannot be peeled off. Can be avoided. As a result, it is possible to prevent troubles caused by a mistake in the front and back of the paper sheet 40. In other words, there is no need to worry about the front and back of the paper sheet 40 when the paper sheet 40 is folded to produce the folding paper container 30. Therefore, the production of the folding paper container 30 can be facilitated.

  As shown in FIG. 1, a plurality of foldable paper containers 30 are produced, and these foldable paper containers 30 are placed in the respective storage chambers 21 of the box body 20. At this time, preferably, the side wall 32 of each foldable paper container 30 is along the longitudinal direction (up and down in FIG. 1) of the box body 20, and the end wall 33 is short in the box body 20 (left and right in FIG. 1). Along. Accordingly, the folded portion 34 extends along the longitudinal direction of the box body 20. In this way, the storage box 2 is completed.

As shown in FIG. 7, the storage box 2 is used as a container for hot melt adhesive A (filler), for example. The operation of storing (filling) the hot melt adhesive A is performed using, for example, the hot melt adhesive filling apparatus 1. The hot melt adhesive filling apparatus 1 has a conveyor 10 and a nozzle 12. For example, eight (plural) nozzles 12 are installed above the filling operation position 11 in the middle of the conveyor 10. The discharge port 14 of each nozzle 12 is directed downward. As shown in FIG. 7A, the eight nozzles 12 form two rows (a plurality of rows) in the conveying direction of the conveyor 10 (left and right in the figure). In each row, four (plural) nozzles 12 are arranged in the width direction of the conveyor 10 (up and down in the figure). As shown in FIG. 7B, a hot melt adhesive supply source 13 is connected to each nozzle 12. The hot melt adhesive supply source 13 heats the hot melt adhesive A to the melting temperature and supplies it to the nozzle 12.
The number and arrangement of the nozzles 12 can be modified as appropriate.

The hot melt adhesive A is filled as follows.
As shown in FIG. 7, the plurality of storage boxes 2 are sequentially transported in a line on the conveyor 10. At this time, preferably, the longitudinal direction of the storage box 2 is directed in the width direction of the conveyor 10, and the short side direction of the storage box 2 is directed in the transport direction of the conveyor 10. Therefore, as shown in FIG. 8, the folding portions 34 of each foldable paper machine 30 are located on both sides (left and right in FIG. 8) of the foldable paper machine 30 in the transport direction.

As shown in FIG. 7B, when each storage box 2 comes to the filling operation position 11 of the conveyor 10, the nozzle 12 and the storage chamber 21 of the storage box 2 face each other one-on-one. . At this time, preferably, after the conveyance by the conveyor 10 is temporarily stopped, the hot melt adhesive A in a molten state is introduced from the hot melt adhesive supply source 13 into the nozzle 12 and discharged from the discharge port 14. Accordingly, the hot melt adhesive A can be injected and filled into the folding paper container 30. In addition, the eight (plural) nozzles 12 and the eight (plural) foldable paper containers 30 have a one-to-one correspondence so that the hot melt adhesive A is filled into the foldable paper containers 30 at a time. be able to.
The sheet body 41 is made of paper, and the release layers 51 and 52 are made of silicone, whereby heat resistance can be secured, and the folding paper container 30 can be prevented from being damaged by the heat of the hot melt adhesive A. .

  After the completion of filling, the discharge of the hot melt adhesive A from the nozzle 12 is stopped, the conveyance by the conveyor 10 is resumed, and the containing box 2 is retreated from directly below the nozzle 12. Further, the upper cover of the hot melt adhesive A in the folding paper container 30 is covered with a cover paper 35 to cover it. Since the cover paper 35 is provided with a release layer on both sides, the cover paper 35 can be easily peeled even if any surface comes into contact with the hot melt adhesive A.

Here, as shown in FIG. 8A, since the hot melt adhesive A at the time of filling is melted and has a high viscosity, it is difficult to cut even if the discharge from the nozzle 12 is stopped. It tends to be a string-like body A1 that hangs down in a thread form. As shown in FIG. 8B, when the conveyance is resumed in this state, the string-like body A1 adheres from the folding paper container 30 to the box body 20 (peripheral member).
Thereafter, the hot melt adhesive A including the string-like body A1 is cured by natural cooling or the like.

  On the other hand, as described above, the folding portions 34 are provided on both side portions (left and right in FIG. 8B) of the folding paper container 30 in the transport direction. Therefore, the string-like body A1 adheres across the partition 22 and the side wall 23 of the box body 20 from the folded-back portion 34. The outer surface of the folded portion 34 is coated with a release layer 51 (or 52). Therefore, the hardened string-like body A1 can be easily peeled off from the folded portion 34. As a result, the foldable paper container 30 and the box body 20 can be reliably separated.

On the other hand, when the foldable paper container 30 is accommodated in the box body 20, it is also assumed that the folding paper container 30 is erroneously accommodated in a direction rotated by 90 ° with respect to the normal direction. In this case, as shown in an enlarged view in FIG. 9, the string-like body A <b> 1 adheres across the box body 20 from the end wall 33 of the folding paper container 30.
Further, even if the folding paper container 30 in the storage box 2 is oriented in the normal direction, the thread-drawn body A1 or the like is not used for some reason during the discharge or conveyance of the hot melt adhesive A from the nozzle 12. It is also assumed that a part of the hot melt adhesive A adheres across the box body 20 from the outer surface of the end wall 33.
Even in such a case, since the peeling layer 52 (or 51) is coated on the outer surface of the end wall 33, the hardened string-like body A1 can be easily peeled off from the end wall 33. As a result, the foldable paper container 30 and the box body 20 can be reliably separated.

  Therefore, when the hot melt adhesive A is used, the folding paper container 30 containing the hot melt adhesive A can be easily taken out from the storage box 2. That is, it is possible to avoid the folding paper container 30 from being adhered to the box body 20 and being difficult to take out, or being unable to be taken out unless the folding paper machine 30 or the box body 20 is broken. Moreover, it can prevent that paper dust generate | occur | produces when the box main body 20 and the folding paper container 30 are torn. As a result, troubles due to adhesion of the thread-drawn body A1 and the like can be prevented, and good workability can be ensured.

  After removal, the foldable paper container 30 is peeled off from the hot melt adhesive A. Since the inner surface of the folding paper container 30 is covered with the release layer 51 (or 52), the folding paper container 30 can be easily and reliably peeled off from the hot melt adhesive A. In addition, it is possible to prevent paper powder from being generated due to a part of the folding paper container 30 being torn during peeling. Therefore, workability can be further improved.

  Thereafter, the hot melt adhesive A is heated and melted and used as an adhesive to be bonded. As described above, since it is possible to prevent paper dust from being generated when the container is taken out from the storage box 2 or when the folding paper container 30 is peeled off, it is possible to avoid deterioration of the quality of the hot melt adhesive A.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the filler accommodated in the folding paper container 30 is not limited to the hot melt adhesive A, and may be a solvent or the like.
The materials and compositions of the first release layer 51 and the second release layer 52 may be different from each other.
In the hot melt adhesive filling device 1, the storage box 2 and the nozzle 12 may be moved relative to each other by moving the nozzle 12.
The folding portion 34 of the folding paper container 30 may be omitted. The folded portion 34 may be provided not only on the side wall 32 of the foldable paper container 30 but also on the end wall 33.

  The present invention is applicable to, for example, a paper container for housing a hot melt adhesive.

30 Foldable paper container 40 Paper sheet 41 Sheet body 41a First surface 41b Second surface 51 First release layer 52 Second release layer

Claims (2)

A folding paper container comprising a single paper sheet, formed into a box shape with an open top by folding the paper sheet, and containing a viscous material ;
A cover paper that is separate from the foldable paper container and is placed in the foldable paper container from the upper surface opening of the foldable paper container and covers the upper surface of the viscous material ,
The paper sheet is
A paper sheet body;
A first release layer coated on the first surface of the sheet body;
A second release layer coated on the second surface on the back side of the first surface of the sheet body;
The cover paper is made of the same material as the paper sheet, and a release layer is provided on both sides of the cover paper . The folding paper container for accommodating a viscous material with a cover paper according to claim 1, wherein one side edge of the cover paper is folded upward to form a knob piece.

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