JP4046316B2 - Cylindrical container and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a rectangular container such as a regular hexagonal cylinder or a regular octagonal cylinder that is folded and formed with cardboard and mainly for storing biscuits, crackers, snacks and other dry lightweight foods, and an improvement of the manufacturing method.
[0002]
[Prior art]
As the structure of the conventional rectangular tube-shaped container and the manufacturing method thereof, there are those described in Japanese Utility Model Publication No. 54-149532, Japanese Utility Model Publication No. 56-44664, or Japanese Utility Model Publication No. 6-3785. Furthermore, only means for forming and maintaining the shape of the end face of the rectangular tube container by means of folding, inserting, bonding, sealing and sticking the top plate, the bottom plate, the folded piece, etc. is employed.
[0003]
[Problems to be solved by the invention]
In the structure of the conventional rectangular tube-shaped container and the manufacturing method thereof, when all the steps from blank to folding into a completed rectangular tube-shaped container are performed in the same processing place, it can be formed into a correct shape. In the current automatic box making apparatus, a series of processing lines are set from the blank supply position to the take-out position of the rectangular tube container as the final product, and each processing such as folding, insertion, and bonding is performed along the processing line. The position is set, and each workpiece is moved along the transfer plate of the processing line and sequentially pushed at a fixed timing by the transfer pressing plate. It is normal to receive processing.
[0004]
However, in the processing by the conventional automatic box making apparatus, as shown schematically in FIG. 9, the rectangular container A is pushed in the direction of the arrow D by the transfer pressing plate C along the transfer plate B. Because of the contact friction with the transport plate B, the side walls E, F, G, and H should show a slight bending tendency in the direction indicated by the arc I and should occupy the orthogonal direction with respect to the transport plate B surface. The top plate, the bottom plate, and the folded piece J in FIG. 9 are displaced from the folded pieces K, L, M, and N in the direction indicated by the arrow O, and the angle θ1 formed between the side wall H and the side wall P in contact with the conveying plate B. Is larger than the angle θ2 formed between the side wall P and the side wall Q in contact with the conveyance fixing plate C, and is bonded R in this state, so that the rectangular tube container A as a product is distorted with respect to the correct rectangular tube shape. It has the problem of becoming a product with reduced product value.
[0005]
For this reason, in this invention, it is not necessary to add any improvement to the automatic box making apparatus, and by inserting the folded piece of the rectangular tube-shaped container as a shape-retaining piece, insertion of the shape-retaining piece that is only one folded piece is performed. The object is to completely prevent the generation of the deformed container only by increasing the number of steps.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, in the first aspect of the present invention, the structure of the rectangular tube-shaped container is as follows.
That is, the top plate piece and the bottom plate piece are connected to the upper and lower ends of the first side wall piece in the side wall piece forming the body portion, and occupy positions corresponding to the first side wall piece in the rectangular tube shape. A rectangular first shape-retaining piece for holding a rectangular tube shape was connected to upper and lower ends of the two side wall pieces, respectively.
[0007]
Further, another shape retaining piece that engages with the first shape retaining piece is connected to the upper and lower ends of each side wall piece other than the first and second side wall pieces.
[0008]
Furthermore, when each said side wall piece forms the trunk | drum of a rectangular tube-shaped container and the said another shape-retaining piece is bent at right angle to the trunk | drum inside, by the edge of the adjacent said other shape-retaining piece, U-shaped openings facing each other were formed. The U-shaped opening is orthogonal to the first shape-retaining piece when the rectangular first shape-retaining piece is bent at a right angle toward the inside of the body, and the U-shaped opening is the center of the container. It is open toward.
[0009]
Next, the first shape retaining piece of the second side wall piece is bent inwardly of the body portion and inserted into the opposite U-shaped openings, and at least the base portion of the first shape retaining piece is inserted. It was supported by another shape-retaining piece, and both side edges of the first shape-retaining piece were opposed to and brought into contact with the opposite side edges of the U-shaped opening facing each other.
[0010]
After that, each shape-retaining piece is joined with an adhesive to form a joined portion, and the top plate piece and the bottom plate piece are bonded to the outer surfaces of the joined portions at the upper and lower ends of the body portion, respectively. The configuration is to do.
[0011]
In the invention of claim 2, the rectangular tube-shaped container having the above-described configuration is assembled by the following method.
That is, a plurality of side wall pieces separated by a plurality of parallel mountain fold lines for forming a body portion of a rectangular tube-shaped container and a top plate connected to upper and lower ends of one side wall piece in the side wall pieces A rectangular shape-retaining piece connected to the upper and lower ends of the side wall piece that occupies a position corresponding to the side wall piece, and another piece located between the two types of side wall pieces A separate shape retaining piece that is connected to the upper and lower ends of each of the side wall pieces and forms a U-shaped cavity that abuts against both side edges of each first shape retaining piece when folded into a rectangular tubular container; A blank was prepared.
[0012]
Next, in the first step of the automatic box making line, the plurality of side wall pieces of the blank were each bent at a mountain fold line, and the side wall pieces at the ends were bonded together to form a square tube body.
[0013]
Next, while feeding the square tube body part along the smooth conveyance plate surface by the pressure plate for conveyance that forms the pressing surface of the semi-cylindrical cross section of the square tube body part,
In the second step, the another shape-retaining piece is bent at a right angle toward the inside of the rectangular tube body, and the other shape-retaining pieces are opened to face each other toward the center line of the rectangular tube body. A U-shaped opening was formed.
[0014]
Next, in the third step, the rectangular first shape-retaining piece is bent at a right angle toward the inside of the rectangular tube body, and the second shape-retaining pieces formed on the opposite sides are opened. Insert from the leading edge into the U-shaped opening, support at least the base with another bent shape retaining piece, and face both sides against the opposite side edge of the U-shaped opening and continue to feed did.
[0015]
Subsequently, as the fourth step, the first shape-retaining piece and the other two shape-retaining pieces are bonded from the outside of the rectangular tube body, and as the fifth step, the first shape-retaining piece is separated from the bonded first shape-retaining piece. The top plate and the bottom plate are bonded to each outer surface of the shape-retaining piece to complete the rectangular tube-shaped container.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
The illustrated embodiment is an embodiment relating to the structure of the regular hexagonal cylindrical container 1B shown in FIG. 7 folded from the cardboard blank 1A shown in FIG. Even a cylindrical container can be provided by the same structure and manufacturing method.
[0017]
A blank 1A shown in FIG. 1 has five mountain folds in which side wall pieces 11, 7, 1, 8, 12, 4 of equal dimensions forming the regular hexagonal cylindrical body 1C shown in FIG. 7 are parallel to each other. The side wall piece 4 is bonded to the side wall piece 11 by the bonding allowance 15 and is formed on the body portion 1C.
[0018]
A top plate 2 and a bottom plate 3 are connected to upper and lower ends of the first side wall piece 1 among the side wall pieces continuous by the mountain fold lines 1D to 1I by mountain fold lines 2A and 3A.
[0019]
In the rectangular tube-like container 1B, the position corresponding to the first side wall piece 1 and the upper and lower ends of the second side wall piece 4 in the symmetrical position in the illustrated embodiment are collinear with the mountain fold lines 2A and 3A. The rectangular first shape retaining pieces 5 and 6 for holding the rectangular tube shape are continuously provided by the mountain fold lines 5 </ b> A and 6 </ b> A that are positioned at the center.
[0020]
In the first shape retaining pieces 5 and 6, the second shape parallel to the first mountain fold lines 5A and 6A is located at a position closer to the end of the shape retaining pieces 5 and 6 from the first mountain fold lines 5A and 6A. Mountain fold lines 5B and 6B are formed.
[0021]
At the upper and lower ends of each third side wall piece 7, 8 connected to both sides of the first side wall piece 1, another shape retaining piece 9 </ b> A that engages with the first shape retaining piece 5, 6. , 9B, 10A, 10B are connected to each other.
[0022]
The first shape retaining piece cooperates with the other shape retaining pieces 9A, 9B, 10A, 10B on the upper and lower ends of the fourth side wall pieces 11, 12 connected to both sides of the second side wall piece 4. The other shape-retaining pieces 13A, 13B, 14A, and 14B that engage with 5 and 6 are connected.
[0023]
In FIG. 1, reference numerals 16 and 17 denote easy-breaking lines for opening. In the outer peripheral area of the top plate 2 and the bottom plate 3, the edge of each shape-retaining piece that is folded and positioned below the top plate 2 and the bottom plate 3. Folding allowances 18 and 19 for covering are formed.
[0024]
The other shape-retaining pieces 9A, 9B, 10A, 10B are bent as described later and have a structure shown in FIG. 3, and a second side wall in contact with the conveying plate B shown in FIG. A U-shaped opening 20 that is a substantially U-shaped cutout that opens in the rectangular tube-shaped container and faces in the direction parallel to the piece 4 is formed, and the other shape retaining pieces 13A, 13B, 14A, 14B A notch edge 21 that is a substantially L-shaped notch that overlaps with one of the opposite side edges of the U-shaped opening 20 that is the notch is formed.
[0025]
The aforementioned rectangular tube-shaped container 1B is continuously manufactured by the existing automatic box making apparatus using the blank 1A as a starting material. In order to facilitate understanding of the structure of the rectangular tube-shaped container 1B, the following An embodiment of the manufacturing method according to the second aspect of the present invention will be described.
[0026]
In the present invention, in a first step in the first position of the automatic box making line, the blank 1A each side wall piece of 11,7,1,8 shown in FIG. 1, 12, 4 of mountain fold lines 1D, 1E, 1F, 1G 1H and the bending margin of each side wall in the mountain fold line 1I of the bonding margin 15 and bonding of the bonding margin 15, and the bonding margin 15 and the fourth sidewall piece 11 are bonded, and the regular hexagonal cylinder body portion 22 shown in FIG. Form. 2 to 6, the top plate 2 and the bottom plate 3 are shown to be bent right above in order to clearly show the end structure of the regular hexagonal cylinder portion 20, but the processing in each step after the second step is performed. Of course, the top plate 2 and the bottom plate 3 may be horizontally arranged as long as the movement of the machine is not hindered.
[0027]
Next, the regular hexagonal cylindrical portion 22 is pushed to the second position along the conveying plate B by the conveying pressing plate C shown in FIG. 9, and as a second step, as shown in FIG. 13A, 13B, 14A, 14B group and another shape-retaining piece 9A, 9B, 10A, 10B group are bent at an angle of 90 degrees, and as shown in FIG. 4, by the notch edge 21 and the U-shaped opening 20, A U-shaped opening 22 is formed that is bent at a right angle toward the inside of the body and opens opposite to each other.
[0028]
Next, the sheet is pushed to the third position, and as the third step, the rectangular first shape-retaining pieces 5, 6 are bent at right angles by the first mountain fold lines 5A, 6A and at the same time the second mountain fold lines 5B, 6B. And the first shape-retaining piece 5, 6 is inserted into the U-shaped opening 22 from the front edge as shown in FIGS. 5 and 6, and the first shape-retaining piece 5, Both side edges 6C and 6D of 6 are opposed to and brought into contact with the opposite side edges 22A and 22B of the U-shaped opening 22, and at least the first shape-retaining pieces 5 and 6 The base is supported from the lower surface by another shape-retaining piece 9A, 9B, 10A, 10B group and another shape-retaining piece 13A, 13B, 14A, 14B group folded. Since the first shape-retaining pieces 5 and 6 are bent at right angles along the first mountain fold lines 5A and 6A, the first shape-retaining pieces 5 and 6 are bent at an obtuse angle along the second mountain fold lines 5B and 6B. 5 and 6 can be easily inserted into the U-shaped opening 22, and the second mountain fold lines 5B and 6B that are bent in an obtuse angle state of the first shape retaining pieces 5 and 6 are spring-backed. Since it returns to the plane state before bending by the action, the first shape retaining pieces 5 and 6 after being inserted into the opening 22 maintain the plane state.
[0029]
Subsequently, it is pushed to the fourth position, and as the fourth step, the other shape-retaining pieces 9A, 9B, 10A, and 10B that are bent and the other shape-retaining pieces 13A, 13B, 14A, and 15A, and the above-mentioned A series of adhesives are applied to the outer surfaces of the rectangular first shape-retaining pieces 5 and 6 inserted into the U-shaped opening 22 and adhered as indicated by the symbol R in FIG. And are integrally bonded to the respective shape retaining piece groups.
[0030]
The contents are filled before each shape-retaining plate is folded, or the contents are filled after the bottom plate 3 side is folded and bonded first, and then the top plate 2 side is folded and bonded. Is done.
[0031]
Although the embodiment described above is a regular hexagonal cylindrical container, in the blank 100 shown in FIG. 8, a regular octagonal cylindrical container can be manufactured with the same structure and method.
[0032]
According to the configuration of the present invention, in the case of a regular pentagonal cylindrical container, the side wall piece to which the rectangular first shape-retaining piece is connected is the side wall piece to which the top plate and the bottom plate are connected to each other. Although it cannot occupy a symmetrical position with the connected side wall pieces, it is of course possible to form a regular pentagonal cylindrical container with exactly the same configuration, and its function and effect are also regular hexagonal cylindrical or regular octagonal. It is the same as a cylindrical container.
[0033]
Therefore, in the case of a regular hexagonal cylindrical or octagonal cylindrical container, the second side wall piece at a position corresponding to the first side wall piece where the top plate piece and the bottom plate piece are connected is symmetrical with respect to the axis. In the case of a regular pentagonal cylindrical container, either one of the two side wall pieces adjacent to each other across the ridge angle edge facing the first side wall piece becomes the corresponding second side wall piece.
[0034]
【The invention's effect】
According to the first aspect of the present invention, the position of the side wall piece forming the body of the rectangular tube-shaped container corresponds to the first side wall piece in which the top plate piece and the bottom plate piece are connected to the upper and lower ends. Another shape-retaining shape connected to the upper and lower ends of each side wall piece other than the first and second side wall pieces is connected to the upper and lower ends of the second side wall piece. The rectangular first shape-retaining piece is inserted into the U-shaped opening that opens toward the center of the container formed by bending the piece at a right angle toward the inside of the container, and at least its base is the back side Is supported by the other shape-retaining piece, and both side edges of the rectangular first shape-retaining piece are in contact with and opposed to the opposite side edge of the U-shaped opening. Adjacent side wall pieces described with reference to FIG. 9 of the square tube body portion that is generated when the square tube body portion is pressed along the conveying plate surface by the pressing plate for use. The change of the crossing angle can be well prevented by the contact between the both side edges of the rectangular first shape-retaining piece and the opposite side edge of the U-shaped opening, and the first shape-retaining piece has at least its Since the base is supported by another shape-retaining piece from the back side, the contact between both side edges of the first shape-retaining piece and the opposite side edge of the U-shaped opening is stable, and the first shape-retaining piece is There is an effect that it is possible to prevent the U-shaped opening from being bent into the container.
[0035]
Furthermore, since each shape-retaining piece and the top plate and the bottom plate are bonded together in a state where the above-described effects can be obtained, the rectangular tube shape of the container body can be deformed even when subjected to the action of external force such as boxing, transportation, stacking, etc. Can be prevented.
[0036]
Further, the increase in the amount of paper used is equivalent to two sheets of the first shape-retaining piece having a slightly rectangular shape, and there is an effect that the increase in cost can be kept small.
[0037]
According to the second aspect of the present invention, the rectangular tubular container according to the first aspect of the present invention having the above-described effects can be bent in the processing line by the conventional automatic box making apparatus. It can be produced simply by adding the process of plugging in and the equipment required for this, and there is an effect of minimizing the increase in costs associated with an increase in facility costs and an increase in processes.
[Brief description of the drawings]
FIG. 1 is a development view of a blank of a regular hexagonal cylindrical container.
FIG. 2 is a perspective view showing a state in which only a body portion is formed from the blank shown in FIG. 1, with a top plate and a bottom plate bent upward.
3 is a perspective view similar to FIG. 2, showing a state in which another shape-retaining piece other than the rectangular first shape-retaining piece is slightly bent from the state shown in FIG. 2;
4 is a perspective view similar to FIG. 2 showing a state in which the another shape-retaining piece is bent by an angle of 90 degrees from the state shown in FIG. 3;
5 is a perspective view similar to FIG. 2 showing a state in which the rectangular first shape-retaining piece has started to be inserted into the U-shaped opening from the state shown in FIG. 4;
6 is a perspective view similar to FIG. 2 showing a state in which the rectangular first shape-retaining piece is completely inserted into the U-shaped opening from the state shown in FIG. 5;
7 is a perspective view showing a state in which a top plate and a bottom plate are bent and bonded from the state shown in FIG. 6. FIG.
FIG. 8 is a development view of a blank of a regular octagonal cylindrical container according to a second embodiment.
9 is a side view showing the state in which an adhesive is applied to the container in the state shown in FIG. 6 and being pushed along the conveying plate B by the conveying pressing plate C from the axial direction of the container. It is explanatory drawing which shows the reason which the fault had arisen with the conventional method, and the site | part which the fault had arisen.
[Explanation of symbols]
1A Blank 1B Regular hexagonal cylindrical container 1C Body 1, 4, 7, 8, 11, 12 Side wall piece 2 Top plate piece 3 Bottom plate piece 5, 6 Rectangular first shape-retaining piece 6C, 6D Both side edges 9A, 9B, 10A, 10B, 13A, 13B, 14A, 14B of the shape piece Another shape-retaining piece 22 U-shaped opening 22A, 22B

Claims (2)

A top plate piece and a bottom plate piece are connected to the upper and lower ends of the first side wall piece in the side wall piece forming the trunk of the rectangular tube-shaped container,
In the rectangular tube shape, a rectangular first shape retaining piece for retaining the rectangular tube shape is connected to upper and lower ends of the second side wall piece occupying a position corresponding to the first side wall piece, respectively. And
Another shape-retaining piece that engages with the first shape-retaining piece is connected to the upper and lower ends of each side-wall piece other than the first and second side-wall pieces,
Each side wall piece is bent to form the body of a rectangular tube-shaped container,
The another shape retaining piece group is bent at a right angle toward the inside of the body portion, and the edge of the adjacent shape retaining piece forms a U-shaped opening facing each other,
該Ko shaped opening, when the rectangular first shape retaining piece is bent at a right angle to the barrel inner, orthogonal to the first Hokatachihen and 該Ko shaped opening, the container open toward the middle mind,
The rectangular first shape-retaining piece is bent at right angles to the inside of the body and inserted into the U-shaped openings facing each other, and at least the base of the first shape-retaining piece is another shape-retaining from the back side. Supported by a piece, and
Both side edges of the first shape-retaining piece are opposed to and contacted with opposite side edges of the U-shaped openings facing each other, and each shape-retaining piece is integrally joined to form a joined portion. A rectangular tube container in which a top plate piece and a bottom plate piece are respectively bonded to the outer surface of the section. A plurality of side wall pieces separated by a plurality of parallel mountain fold lines for forming a body portion of a rectangular tube-shaped container, and a top plate piece connected to upper and lower ends of the side wall piece and one of the side wall pieces And a bottom plate piece, and a rectangular first shape-retaining piece connected to the upper and lower ends of the side wall piece occupying a position corresponding to the side wall piece, and the two kinds of side wall pieces in the body portion of the container. Another shape-retaining piece that is connected to the upper and lower ends of each of the other side wall pieces and forms a U-shaped opening that contacts both side edges of each first shape-retaining piece when folded into a rectangular tubular container A blank consisting of
In the first step of the automatic box making line, each side wall piece is bent at a mountain fold line, and the side wall pieces at the end are bonded together to form a square tube body,
Next, the other shape-retaining piece in the second step while the square cylinder body is pushed along the smooth conveyance plate surface by the conveyance pressing plate that forms the pressing surface of the semi-cylindrical cross section of the square cylinder body. Is bent at a right angle toward the inside of the square tube body, and by this another shape retaining piece group, a U-shaped opening is formed that is opposed to each other toward the center line of the square tube body,
In the third step, a U-shaped opening that is opened opposite to each other formed by the another shape-retaining piece while the rectangular shape-shaped first shape-retaining piece is bent at a right angle toward the inside of the rectangular tube body. into the part by inserting the front end edge, at least the base support in a different shape retention pieces are bent, facing the side edges on opposite side edges of the U-shaped opening, to continue the pusher by contacting ,
As the fourth step, both shaped pieces are bonded from the outside of the rectangular tubular body,
As a fifth step, a top plate and a bottom plate are bonded to each outer surface of each of the bonded shape retaining pieces.

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