WO2020031318A1 - Paper container production device, paper container production method, and paper container - Google Patents

Paper container production device, paper container production method, and paper container Download PDF

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Publication number
WO2020031318A1
WO2020031318A1 PCT/JP2018/029862 JP2018029862W WO2020031318A1 WO 2020031318 A1 WO2020031318 A1 WO 2020031318A1 JP 2018029862 W JP2018029862 W JP 2018029862W WO 2020031318 A1 WO2020031318 A1 WO 2020031318A1
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WO
WIPO (PCT)
Prior art keywords
mold
paper container
die
paper
ruled line
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PCT/JP2018/029862
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French (fr)
Japanese (ja)
Inventor
隆昌 篠原
歩 筒木
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東洋アルミエコープロダクツ株式会社
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Priority to PCT/JP2018/029862 priority Critical patent/WO2020031318A1/en
Publication of WO2020031318A1 publication Critical patent/WO2020031318A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/25—Surface scoring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/59—Shaping sheet material under pressure

Definitions

  • the present invention relates to a paper container manufacturing apparatus, a paper container manufacturing method, and a paper container, and more particularly, to a paper container manufacturing apparatus formed by at least two pressing steps, and a paper container manufacturing method using the paper container manufacturing apparatus. And a paper container obtained by the paper container manufacturing apparatus.
  • FIG. 10 is a perspective view showing the appearance of a conventional paper container.
  • paper container 70 has a square bottom 71, a side wall 72 extending upward from the outer edge of bottom 71, a corner 74 connecting side walls 72 together, a side wall 72 and a corner 74. And a rim 73 formed on the outer edge of the rim.
  • the paper container 70 is formed by press-forming one blank sheet.
  • Such press-formed paper containers are lightweight and advantageous in cost, and thus are mainly used for storing foods.
  • Various manufacturing apparatuses by press molding for manufacturing such paper containers have been proposed (for example, Japanese Patent Application Laid-Open No. 2011-212882).
  • FIG. 11 is a schematic view showing a conventional paper container manufacturing apparatus
  • FIG. 12 is a schematic view showing a base paper processing step in the paper container manufacturing apparatus shown in FIG. This shows the state immediately after the supply position (B1), (2) shows the state immediately after the ruled line forming position (B2), and (3) shows the state immediately after the punching / pressing position (B3). It is shown.
  • FIG. 13 is a schematic sectional view showing a first mold part of the paper container manufacturing apparatus shown in FIG. 11, and FIG. 14 is a second mold of the paper container manufacturing apparatus shown in FIG. It is a schematic sectional drawing which shows the part.
  • a conventional paper container manufacturing apparatus 80 includes a supply apparatus 81 that supplies a strip-shaped base paper 77 to the upstream side thereof. Further, a molding device 83 is disposed downstream of the supply device 81.
  • the molding device 83 includes a pair of first molds 91a and 91b shown in FIG. 13 located on the upstream side and a diagram located on the downstream side. 14 and a pair of second molds 92a and 92b. Specific uses of each mold will be described later.
  • the first dies 91a and 91b and the second dies 92a and 92b are attached to a pair of up and down moving devices 84.
  • the strip-shaped base paper 77 wound in a roll and arranged at the base paper supply position B1 is continuously supplied from the supply device 81 to the ruled line forming position B2.
  • the supplied base paper 77 is moved by the first molds 91a and 91b of the molding device 83 at the ruled line forming position B2, as shown in (2) of FIG. Are formed at predetermined positions.
  • the base paper 77 on which the ruled lines 75 are formed is then transferred to a punching / pressing position B3.
  • the transferred base paper 77 slides between the cutting edges (not shown) provided in the second dies 92a and 92b of the molding device 83 at the punching / pressing position B3.
  • the blank sheet is punched into a desired shape.
  • the blank sheet is pressed into a container shape by the pressing end surfaces of the upper mold member 93 of the second mold 92a and the lower mold member 94 of the second mold 92b in the same position.
  • the end of the pressed blank sheet is wound by the curl groove 99 formed by the contact between the elevating member 97 and the curling member 98 to form the rim 73.
  • the first molds 91a and 91b and the second molds 92a and 92b are attached to the pair of vertical movement devices 84, the first molds 91a and 91b and the second molds 92a and 92b Act on the base paper 77 and the blank sheet in synchronization. Accordingly, the production efficiency is improved, and the molding device 83 and the manufacturing device 80 are compact.
  • the ruled line formation can be performed.
  • the production efficiency is improved by synchronizing the two different press working processes of punching and forming.
  • the rigidity of each of the first molds 91a and 91b and the second molds 92a and 92b with respect to the compressive force is different from each other due to the difference in the structure and the like of each mold.
  • the second molds 92a and 92b are considered to have lower rigidity than the first molds 91a and 91b from the configuration.
  • FIG. 15 is a schematic diagram showing the positional relationship between the first die and the second die during press working of the paper container manufacturing apparatus shown in FIG. 11, and (1) shows a state at the start of press working. (2) is a diagram showing a state immediately before sandwiching the base paper, and (3) is a diagram showing a state during pressing. In FIG. 15, the illustration of the base paper is omitted for clarity of the drawing.
  • the upper supports 88 of the pair of vertical movement devices 84 further descend to the bottom dead center of each of the first mold 91a and the second mold 92a, and are not shown.
  • the base paper is subjected to press ruled line processing by the first dies 91a and 91b, and punching and press forming by the second dies 92a and 92b.
  • the upper support 88 is entirely in the second mold due to the difference in compression strain between the first molds 91a and 91b and the second molds 92a and 92b. It inclines slightly diagonally downward toward the side.
  • FIG. 16 is a plan view showing the state of the base paper after the press crease processing by the first die shown in FIG.
  • the compressive force is not evenly applied to the entire first mold, so that the upstream ruled line 75 where the compressive force is reduced. Tends to cause poor formation such as blurring. In addition, as a result, molding defects tend to occur in the subsequent punching and press molding steps.
  • the present invention has been made in order to solve the above-described problems, and can stably mass-produce high-quality paper containers, a paper container manufacturing apparatus with improved press molding accuracy, a paper container manufacturing method, and It is intended to provide a paper container.
  • a paper container manufacturing apparatus is a paper container manufacturing apparatus formed by a first pressing step and a second pressing step.
  • At least one of the upper mold and the lower mold is provided with a correcting means for correcting the facing distance between the dies during press forming so as to approach the original distance.
  • An apparatus for manufacturing a paper container according to a second aspect of the present invention is an apparatus for manufacturing a paper container by press molding, comprising: a base paper supply means for supplying a band-shaped base paper; After forming a ruled line for absorbing wrinkles, a ruled line forming means for transferring, a blank sheet punching means for punching a blank sheet of a desired shape including at least a part of the ruled line from the transferred base paper, Press means for press-forming the blank sheet at that position, wherein the ruled line forming means comprises a first mold, the blank sheet punching means and the press means comprise a second mold, and a first mold.
  • the second mold are attached to a pair of up and down moving devices, and at least one of the upper mold and the lower mold constituting the first mold has a facing distance between the molds when forming the ruled line.
  • the correcting means may include a lower mold and a lower support of a vertical moving device that supports the lower mold. It includes at least one gas cushion installed.
  • the apparatus for manufacturing a paper container according to a fourth aspect of the present invention is the configuration of the invention according to the third aspect, wherein the lower mold has a substantially rectangular shape in plan view, and the gas cushion is provided at each lower surface corner of the lower mold. It is arranged in.
  • a method for manufacturing a paper container according to a fifth aspect of the present invention is a method for manufacturing a paper container, wherein the paper container is manufactured using the apparatus for manufacturing a paper container according to any one of the first to fourth aspects. Things.
  • the paper container according to the sixth aspect of the present invention is a paper container, which is obtained by the paper container manufacturing apparatus according to any one of the first to fourth aspects.
  • the press molding accuracy is improved, so that the quality of the paper container is improved.
  • the accuracy of forming the ruled line is improved, and thus the quality of the paper container is improved.
  • the stroke changes depending on the magnitude of the force applied to the gas cushion.
  • the inclination of the lower mold follows the inclination of the mold.
  • the apparatus for manufacturing a paper container according to the fourth aspect of the present invention in addition to the effect of the invention according to the third aspect, always performs correction by the gas cushion regardless of the inclination direction of the upper mold. The reliability of the ruled line forming operation is improved.
  • the press molding accuracy is improved, so that a paper container with improved quality can be manufactured.
  • the paper container according to the sixth aspect of the present invention is an improved quality paper container because the press molding accuracy is improved.
  • FIG. 2 is a schematic cross-sectional view showing a first mold part of the paper container manufacturing apparatus shown in FIG. 1 and showing a state before press crease processing.
  • FIG. 3 is a schematic sectional view taken along line III-III shown in FIG. 2.
  • FIG. 2 is a schematic cross-sectional view illustrating a second mold part of the paper container manufacturing apparatus illustrated in FIG. 1, illustrating a state before punching and press forming.
  • FIG. 2 is a schematic diagram illustrating a positional relationship between a first mold and a second mold during press working of the paper container manufacturing apparatus illustrated in FIG. 1.
  • FIG. 1 is a schematic cross-sectional view showing a first mold part of the paper container manufacturing apparatus shown in FIG. 1 and showing a state before press crease processing.
  • FIG. 3 is a schematic sectional view taken along line III-III shown in FIG. 2.
  • FIG. 2 is a schematic cross-sectional view illustrating a second mold part of the paper container manufacturing apparatus illustrated in FIG. 1, illustrating a state before punching
  • FIG. 2 is a schematic cross-sectional view illustrating a portion including a first mold of the paper container manufacturing apparatus illustrated in FIG. 1, and is a diagram illustrating a state during press crease processing.
  • FIG. 7 is a plan view showing a state of a base paper after press crease processing by a first mold shown in FIG. 6.
  • FIG. 2 is a schematic cross-sectional view illustrating a portion including a second mold of the apparatus for manufacturing the paper container illustrated in FIG. 1, illustrating a state during punching and press forming.
  • FIG. 9 is a schematic cross-sectional view showing a first mold part of a paper container manufacturing apparatus according to a second embodiment of the present invention, showing a state before press crease processing, and corresponds to FIG. 2.
  • FIG. 2 is a schematic cross-sectional view illustrating a portion including a first mold of the paper container manufacturing apparatus illustrated in FIG. 1, and is a diagram illustrating a state during press crease processing.
  • FIG. 7 is a plan view showing a state of
  • FIG. 12 is a schematic diagram illustrating a process of processing base paper in the paper container manufacturing apparatus illustrated in FIG. 11.
  • FIG. 12 is a schematic sectional view showing a first mold part of the paper container manufacturing apparatus shown in FIG. 11.
  • FIG. 12 is a schematic cross-sectional view illustrating a second mold portion of the paper container manufacturing apparatus illustrated in FIG. 11.
  • FIG. 12 is a schematic diagram illustrating a positional relationship between a first mold and a second mold during press working of the paper container manufacturing apparatus illustrated in FIG. 11.
  • FIG. 14 is a plan view showing a state of the base paper after press crease processing by the first die shown in FIG. 13.
  • FIG. 1 is a schematic diagram showing an apparatus for manufacturing a paper container according to the first embodiment of the present invention.
  • a paper container 50 manufactured by the paper container manufacturing apparatus 10 according to the present embodiment has the same configuration as the conventional paper container 70 shown in FIG.
  • the paper container manufacturing apparatus 10 has basically the same configuration as a conventional paper container manufacturing apparatus. Each device and operation of the paper container manufacturing apparatus 10 will be briefly described in order from the upstream side.
  • the strip-shaped base paper 57 wound in a roll disposed at the base paper supply position A1 is subjected to a surface coating process or the like by a supply device 11 which is a base paper supply unit in the same manner as in the related art. It is continuously supplied to the downstream molding device 13.
  • the molding device 13 includes a pair of up and down movement devices 14, which will be described in detail later, and a first mold 21 serving as a ruled line forming means is mounted at a ruled line forming position A2 on the upstream side. Between the lower mold 21b of the first mold 21 and the lower support 19, gas cushions 23a to 23d are provided. Further, at a punching / pressing position A3 on the downstream side of the pair of vertical moving devices 14, a second die 22 as a blank sheet punching means and a pressing means is attached.
  • the base paper 57 supplied from the supply device 11 has a ruled line for absorbing wrinkles at the time of molding by the first mold 21 as shown in FIG. It is formed at a position corresponding to 50 corners. Then, the base paper 57 on which the ruled lines are formed is transferred to the punching / pressing position A3 on the downstream side as it is.
  • the base paper 57 on which the ruled lines are formed is punched by the second mold 22 as a blank sheet of a desired shape such as a substantially square shape so as to include at least a part of the ruled lines at the punching / pressing position A3. It is. Further, the blank sheet thus punched is pressed into a container shape by the second mold 22 at that position, and the paper container 50 is formed.
  • FIG. 2 is a schematic cross-sectional view showing a first mold part of the paper container manufacturing apparatus shown in FIG. 1, showing a state before press crease processing
  • FIG. 3 is a schematic cross-sectional view of the line III-III indicated by.
  • the first mold 21 is composed of an upper mold 21a and a lower mold 21b, and is a mold having a square shape in plan view.
  • the upper mold 21a of the first mold 21 faces the upper support 18 of the pair of vertically moving devices, and the lower mold 21b of the first mold 21 faces the lower support 19, and the molds face each other. So that it is attached.
  • Each of the corners of the pressing end surface 26 of the upper die 21a of the first die 21 has a ruled line groove 28 for forming a ruled line, and the pressing end surface of the lower die 21b of the first die 21 is formed.
  • Ruled line blades 29 for forming ruled lines are formed radially at each of the corners of the mold 27.
  • the four gas cushions 23a to 23c are provided as correction means for correcting the facing distance between the upper mold 21a and the lower mold 21b of the first mold 21 so as to approach the original distance at a position corresponding to the corner portion of the first mold 21. 23d are respectively arranged.
  • FIG. 4 is a schematic sectional view showing a second mold part of the paper container manufacturing apparatus shown in FIG. 1, showing a state before punching and press forming.
  • the second mold 22 is composed of an upper mold 22a and a lower mold 22b, and is a mold having a square shape in plan view.
  • the upper mold 22a of the second mold 22 faces the upper support 18 of the pair of vertical moving devices, and the lower mold 22b of the second mold 22 faces the lower support 19, so that the molds face each other. Attached to.
  • the pressing end surface 36 of the upper die member 38 of the upper die 22a of the second die 22 is formed in a shape corresponding to, for example, the bottom 71 and the side wall 72 of the paper container 70 shown in FIG. .
  • the pressing end surface 37 of the lower die member 39 of the lower die 22b of the second die 22 is formed in a shape corresponding to the pressing end surface 36 of the upper die member 38 of the upper die 22a.
  • the upper mold member 38 of the upper mold 22 a of the second mold 22 is vertically movable with respect to the upper support 18.
  • An elevating member 31 is arranged on the outer peripheral side of the upper die member 38 of the upper mold 22a, and a lower outer diameter cutting edge (not shown) is provided at an outer edge of a lower end surface of the elevating member 31.
  • an outer frame member 32 that is vertically movable with respect to the upper support 18 is disposed on the outer peripheral side of the elevating member 31.
  • the upper end surface thereof is located below the lower end surface of the elevating member 31, and is vertically movable with respect to the lower support 19.
  • the curling member 33 is disposed.
  • a fixing member 34 whose upper end surface is located below the lower end surface of the outer frame member 32 is disposed on the outer peripheral side of the curling member 33.
  • An upper outer diameter cutting edge (not shown) is provided at an inner edge of the upper end surface of the fixing member 34.
  • the operation of the molding device 13 and the positional relationship between the dies during the press working will be schematically described.
  • the second mold 22 has lower rigidity than the first mold 21 as in the conventional case.
  • FIG. 5 is a schematic diagram showing a positional relationship between a first mold and a second mold during press working of the paper container manufacturing apparatus shown in FIG. 1, and (1) shows a state at the start of press working. (2) is a diagram showing a state immediately before sandwiching the base paper, and (3) is a diagram showing a state during pressing. In FIG. 5, the illustration of the base paper is omitted for clarity of the figure.
  • the upper mold of the first mold 21 is moved similarly to the conventional paper container manufacturing apparatus.
  • Each of the lower mold 21a, the lower mold 21b, and the upper mold 22a and the lower mold 22b of the second mold 22 sandwiches a base paper (not shown).
  • the facing distance between the upper die 21a and the lower die 21b of the first die 21 is the original distance at this time.
  • the second mold 22 there is no particular problem. The same can be said for the second mold 22.
  • the upper supports 18 of the pair of up-and-down moving devices 14 further include an upper mold 21a and a second mold 21 of the first mold 21 in the same manner as the conventional paper container manufacturing apparatus.
  • Each of the upper molds 22a of the second mold 22 is lowered, and the base paper (not shown) is subjected to press crease processing by the first mold 21 and punching and press forming by the second mold 22 in parallel. .
  • the upper support 18 as a whole is obliquely downward toward the second mold 22 due to the difference in compression strain between the first mold 21 and the second mold 22. Incline slightly.
  • a gap is generated between the upper mold 21a and the lower mold 21b of the first mold 21 slightly expanding toward the upstream side.
  • This gap is expected to be larger than the gap between the upper mold 22a and the lower mold 22b of the second mold 22.
  • the facing distance between the upper mold 21a and the lower mold 21b of the first mold 21 becomes non-uniform, and the original distance at that time cannot be maintained. Formation becomes uneven.
  • the gas cushions 23a to 23d act on the lower mold 21b of the first mold 21 and the upper mold 21a and the lower mold 21b of the first mold 21 are connected to each other. The opposing distance is corrected so as to approach the original distance at that time.
  • FIG. 6 is a schematic sectional view showing a part including the first mold of the apparatus for manufacturing the paper container shown in FIG. 1, and is a view showing a state during press crease processing.
  • the upper mold 21a of the first mold 21 is slightly inclined to the downstream side in accordance with the inclination of the upper support 18 at the stage of (3) in FIG. Therefore, the upper mold 21a of the first mold 21 contacts the downstream side of the lower mold 21b of the first mold 21 first, and a force is applied. Then, of the gas cushions 23a to 23d arranged on the lower surface of the lower mold 21b of the first mold 21, the rods 24b and 24d of the gas cushions 23b and 23d on the downstream side descend. In addition, the rods 24a, 24c of the gas cushions 23a, 23c on the upstream side rise correspondingly.
  • the stroke X of the rods 24a, 24c of the gas cushions 23a, 23c is longer than the stroke Y of the rods 24b, 24d of the gas cushions 23b, 23d.
  • the lower mold 21b of the first mold 21 follows the inclination of the upper mold 21a of the first mold 21, and as a result, the facing distance between the molds approaches the original distance at this time. Will be corrected.
  • FIG. 7 is a plan view showing the state of the base paper after the press crease processing by the first mold shown in FIG.
  • FIG. 8 is a schematic cross-sectional view showing a portion including the second mold of the apparatus for manufacturing the paper container shown in FIG. 1, showing a state during punching and press forming.
  • the base paper 57 transferred between the upper mold 22a and the lower mold 22b of the second mold 22 is moved to a predetermined position where the ruled line 55 shown in FIG. Stop at the position of. Then, according to the procedures (1) to (3) in FIG. 5, punching and press forming are performed with a predetermined compression force. Then, first, the upper outer diameter cutting edge of the elevating member 31 of the second mold 22 and the lower outer diameter cutting edge of the fixing member 34 of the second mold 22 are brought into sliding contact with each other, and the base paper 57 is cut into a desired shape. The sheet is punched.
  • the upper die member 38 of the second die 22 is further lowered while the blank sheet is punched out. Then, the blank sheet is pressed into a container shape by the pressing end faces 36 and 37 of the upper mold member 38 and the lower mold member 39 of the second mold 22. At this time, since a high-precision ruled line is formed in the blank sheet in the previous ruled line forming step, wrinkles are likely to be appropriately brought to the corners, and the quality at the time of molding can be stabilized.
  • the second sheet is moved from the position to the second mold 22a.
  • the upper mold 22a of the mold 22 is raised.
  • the upper support 18 is also inclined, but is inclined downstream, so that the upper mold 22a and the lower mold 22b of the second mold 22 generated by the inclination. Can be said to be relatively small, and the variation is small. In other words, it is considered that the variation in the gap is absorbed by the compression strain and the clearance of the second mold 22, and the problem that the facing distance does not become the original distance is hardly affected.
  • the accuracy of forming the ruled line 55 is improved. Is improved. Further, since the stroke changes according to the magnitude of the force applied to the gas cushions 23a to 23d, the inclination of the lower mold 21b follows the inclination of the upper mold 21a of the first mold 21. Further, since the four gas cushions 23a to 23d are arranged, correction is always performed by the gas cushions 23a to 23d irrespective of the inclination direction of the upper mold 21a of the first mold 21. Of the ruled line forming operation is further improved.
  • FIG. 9 is a schematic cross-sectional view showing a first mold portion of the paper container manufacturing apparatus according to the second embodiment of the present invention, showing a state before press crease processing. It is a figure corresponding to No. 2.
  • the paper container manufacturing apparatus has a configuration in which a gas cushion as correction means is replaced with a joint member 43 at a ruled line forming position A2.
  • Other configurations are the same as those of the first embodiment, and thus description thereof will not be repeated.
  • the paper container manufacturing apparatus is arranged between the lower surface of the lower mold 21b of the first mold 21 and the lower support 19 of the pair of vertical moving devices 14.
  • the joint member 43 is a correcting means for correcting the facing distance between the dies at the time of forming the ruled line so as to approach the original distance.
  • the joint member 43 includes an upper member 44 and a lower member 45, and the upper member 44 is rotatable with respect to the lower member 45 around a single shaft 46 through which the upper member 44 and the lower member 45 are inserted. It is connected.
  • the upper member 44 of the joint member 43 is attached to the center of the lower surface of the lower mold 21b of the first mold 21, and the lower member 45 of the joint member 43 is mounted on the lower support 19 of the vertical moving device 14. It is fixed in the corresponding position.
  • the shaft 46 is attached so that the axial direction of the shaft 46 is orthogonal to the upstream-downstream direction of the lower mold 21b of the first mold 21.
  • the lower mold 21b of the first mold 21 is rotatable (tilted) in the upstream-downstream direction.
  • a spring or the like is provided at a corner of the lower mold 21b of the first mold 21 although not shown. May be provided.
  • the press crease processing and the punching / press forming are performed by the first die and the second die attached to the pair of vertical moving devices.
  • another pressing process may be used, such as a configuration in which a heating process is performed as a first pressing process and a molding process is performed subsequently as a second pressing process.
  • the configuration is such that the strip-shaped base paper is subjected to the press crease processing and the punching / press forming.
  • the blank sheet punched into a predetermined shape from the beginning is subjected to the press crease processing and the press forming. Processing may be performed.
  • the correcting means is provided in the lower die of the first die, but is not limited to this. That is, at least one of the upper mold and the lower mold of the first mold and the upper mold and the lower mold of the second mold may be provided.
  • the stroke of the gas cushion which is the correcting means, changes according to the magnitude of the force applied to the gas cushion, so that the lower mold follows the upper mold.
  • the gas cushion may be operated by another method as long as the facing distance between the upper mold and the lower mold can be corrected so as to approach the original distance.
  • the correcting means is composed of a gas cushion or a joint member.
  • the entire mounting side of the mold is made of rubber, spring, or the like.
  • other means such as an oil cushion or a ball joint may be employed.
  • gas cushions are arranged at the corners of the lower mold of the first mold, but at least one gas cushion may be arranged.
  • the pressing process includes two pressing processes.
  • the pressing process includes three or more pressing processes, the die is attached to a pair of vertical moving devices. If so, the same can be applied.
  • each of the embodiments described above relates to a paper container manufacturing apparatus.
  • the embodiments described above also relate to a method of manufacturing a paper container using the paper container manufacturing apparatus of each of the above embodiments. The same applies.
  • each of the embodiments described above relates to a paper container manufacturing apparatus, but can be similarly applied to the embodiment of a paper container obtained by the paper container manufacturing apparatus of each of the above embodiments. .
  • a storage container that can be suitably used for storing foods and the like is obtained.

Abstract

A molding device (13) which constitutes part of a paper container production device (10) and is equipped with a pair of vertically moving devices (14), and to which are attached, from the upstream side, a first die (21) which is a scoring means and a second die (22) which constitutes a blank sheet-punching means and a pressing means. In addition, gas cushions (23a-23d) are positioned below the lower die (21b) of the first die (21). The starting paper (57) is continuously supplied from a supply device (11) to the molding device (13), and the scoring in a prescribed location by the first die (21) and the blank sheet punching and container formation by the second die (22) are performed in parallel in the supplied order. When doing so, the gas cushions (23a-23d) improve the scoring accuracy, by correcting the distance between the upper die (21a) of the first die (21) and the lower die (21b) thereof so as to approach the original distance therebetween, regardless of tilting of the upper support body (18) of the vertically moving devices (14).

Description

紙容器の製造装置、紙容器の製造方法及び紙容器Paper container manufacturing apparatus, paper container manufacturing method, and paper container
　この発明は紙容器の製造装置、紙容器の製造方法及び紙容器に関し、特に、少なくとも２つのプレス工程によって成形される紙容器の製造装置、この紙容器の製造装置を用いた紙容器の製造方法、及びこの紙容器の製造装置によって得られる紙容器に関するものである。 The present invention relates to a paper container manufacturing apparatus, a paper container manufacturing method, and a paper container, and more particularly, to a paper container manufacturing apparatus formed by at least two pressing steps, and a paper container manufacturing method using the paper container manufacturing apparatus. And a paper container obtained by the paper container manufacturing apparatus.
　図１０は、従来の紙容器の外観形状を示す斜視図である。 FIG. 10 is a perspective view showing the appearance of a conventional paper container.
　図を参照して、紙容器７０は、正方形状の底部７１と、底部７１の外縁から上方に延びる側壁部７２と、側壁部７２同士を接続するコーナー部７４と、側壁部７２及びコーナー部７４の外縁に形成された縁巻７３とから構成されている。そして、紙容器７０は、１枚のブランクシートをプレス成形することによって形成されている。 Referring to the figure, paper container 70 has a square bottom 71, a side wall 72 extending upward from the outer edge of bottom 71, a corner 74 connecting side walls 72 together, a side wall 72 and a corner 74. And a rim 73 formed on the outer edge of the rim. The paper container 70 is formed by press-forming one blank sheet.
　このような、プレス成形された紙容器は、軽量且つコスト的に有利となるため、主に食品の収納を目的として使用されている。そして、このような紙容器を製造するためのプレス成形による製造装置は、種々提案されている（例えば、日本国特開２０１１－２１２８８２号公報）。 (4) Such press-formed paper containers are lightweight and advantageous in cost, and thus are mainly used for storing foods. Various manufacturing apparatuses by press molding for manufacturing such paper containers have been proposed (for example, Japanese Patent Application Laid-Open No. 2011-212882).
　図１１は、従来の紙容器の製造装置を示す概略図であり、図１２は、図１１で示した紙容器の製造装置における原紙の加工工程を示す模式図であって、（１）は原紙供給位置（Ｂ１）直後の状態を示すものであり、（２）は罫線形成位置（Ｂ２）直後の状態を示すものであり、（３）は打抜・プレス加工位置（Ｂ３）直後の状態を示すものである。 FIG. 11 is a schematic view showing a conventional paper container manufacturing apparatus, and FIG. 12 is a schematic view showing a base paper processing step in the paper container manufacturing apparatus shown in FIG. This shows the state immediately after the supply position (B1), (2) shows the state immediately after the ruled line forming position (B2), and (3) shows the state immediately after the punching / pressing position (B3). It is shown.
　又、図１３は、図１１で示した紙容器の製造装置の第１金型の部分を示す概略断面図であり、図１４は、図１１で示した紙容器の製造装置の第２金型の部分を示す概略断面図である。 FIG. 13 is a schematic sectional view showing a first mold part of the paper container manufacturing apparatus shown in FIG. 11, and FIG. 14 is a second mold of the paper container manufacturing apparatus shown in FIG. It is a schematic sectional drawing which shows the part.
　図１１を参照して、従来の紙容器の製造装置８０は、その上流側に帯状の原紙７７を供給する供給装置８１を備えている。又、供給装置８１の下流側には、成型装置８３が配置され、成型装置８３は、その上流側に位置する図１３で示す一対の第１金型９１ａ、９１ｂと、下流側に位置する図１４で示す一対の第２金型９２ａ、９２ｂとを備えている。各金型の具体的な用途については後述する。そして、第１金型９１ａ、９１ｂと第２金型９２ａ、９２ｂとは、一対の上下移動装置８４に取り付けられている。 Referring to FIG. 11, a conventional paper container manufacturing apparatus 80 includes a supply apparatus 81 that supplies a strip-shaped base paper 77 to the upstream side thereof. Further, a molding device 83 is disposed downstream of the supply device 81. The molding device 83 includes a pair of first molds 91a and 91b shown in FIG. 13 located on the upstream side and a diagram located on the downstream side. 14 and a pair of second molds 92a and 92b. Specific uses of each mold will be described later. The first dies 91a and 91b and the second dies 92a and 92b are attached to a pair of up and down moving devices 84.
　図１２を併せて参照して、従来の紙容器の製造装置８０の動作の流れについて上流側から簡略的に説明する。 動作 The operation flow of the conventional paper container manufacturing apparatus 80 will be briefly described from the upstream side with reference to FIG.
　まず、原紙供給位置Ｂ１に配置されたロール状に巻回された帯状の原紙７７は、供給装置８１から罫線形成位置Ｂ２へ連続的に供給される。 First, the strip-shaped base paper 77 wound in a roll and arranged at the base paper supply position B1 is continuously supplied from the supply device 81 to the ruled line forming position B2.
　次に、供給された原紙７７は、罫線形成位置Ｂ２で、成型装置８３の第１金型９１ａ、９１ｂによって、図１２の（２）で示すように成形時の皺を吸収するための罫線７５が所定の位置に形成される。罫線７５が形成された原紙７７は、次に打抜・プレス加工位置Ｂ３まで移送される。 Next, the supplied base paper 77 is moved by the first molds 91a and 91b of the molding device 83 at the ruled line forming position B2, as shown in (2) of FIG. Are formed at predetermined positions. The base paper 77 on which the ruled lines 75 are formed is then transferred to a punching / pressing position B3.
　そして、図１４を併せて参照して、移送された原紙７７は、打抜・プレス加工位置Ｂ３で、成型装置８３の第２金型９２ａ、９２ｂのそれぞれに備えられた図示しない刃先同士が摺接してブランクシートが所望の形状に打ち抜かれる。更に、そのままの位置で、第２金型９２ａの上型部材９３と第２金型９２ｂの下型部材９４との各々の加圧端面によって、ブランクシートが容器形状にプレスされる。更に、そのままの位置で、プレスされたブランクシートの端部が、昇降部材９７とカーリング部材９８が当接することによって形成されるカール溝９９によって巻かれ、縁巻７３が形成される。 Then, with reference to FIG. 14 as well, the transferred base paper 77 slides between the cutting edges (not shown) provided in the second dies 92a and 92b of the molding device 83 at the punching / pressing position B3. Upon contact, the blank sheet is punched into a desired shape. Further, the blank sheet is pressed into a container shape by the pressing end surfaces of the upper mold member 93 of the second mold 92a and the lower mold member 94 of the second mold 92b in the same position. Further, at the position as it is, the end of the pressed blank sheet is wound by the curl groove 99 formed by the contact between the elevating member 97 and the curling member 98 to form the rim 73.
　このようにして、図１０で示した紙容器７０は成形される。 、 Thus, the paper container 70 shown in FIG. 10 is formed.
　このように、第１金型９１ａ、９１ｂと第２金型９２ａ、９２ｂとが一対の上下移動装置８４に取り付けられているため、第１金型９１ａ、９１ｂと第２金型９２ａ、９２ｂとは同期して原紙７７及びブランクシートに作用することになる。従って、生産効率が向上すると共に、成型装置８３及び製造装置８０がコンパクトになる。 As described above, since the first molds 91a and 91b and the second molds 92a and 92b are attached to the pair of vertical movement devices 84, the first molds 91a and 91b and the second molds 92a and 92b Act on the base paper 77 and the blank sheet in synchronization. Accordingly, the production efficiency is improved, and the molding device 83 and the manufacturing device 80 are compact.
日本国特開２０１１－２１２８８２号公報Japanese Patent Application Laid-Open No. 2011-212882
　上述したように、従来の紙容器の製造装置８０では、一対の上下移動装置８４に、種類が異なる第１金型９１ａ、９１ｂと第２金型９２ａ、９２ｂとを取り付けることで、罫線形成と打抜・成形という２つの異なるプレス加工工程を同期させて生産効率を向上させている。この場合、各金型の構造等の違いから、第１金型９１ａ、９１ｂ及び第２金型９２ａ、９２ｂの各々の圧縮力に対するその剛性は異なると考えられる。すると、同一の圧縮力をかけてプレス成形を行った場合、第１金型９１ａ、９１ｂ及び第２金型９２ａ、９２ｂのそれぞれの圧縮歪に差が出ることになる。そのため、次のような問題が生じる。尚、この従来の紙容器の製造装置８０においては、その構成から第２金型９２ａ、９２ｂの方が第１金型９１ａ、９１ｂに比べて剛性が低いものと考えられる。 As described above, in the conventional paper container manufacturing apparatus 80, by attaching the first molds 91a and 91b and the second molds 92a and 92b of different types to the pair of up-and-down moving devices 84, the ruled line formation can be performed. The production efficiency is improved by synchronizing the two different press working processes of punching and forming. In this case, it is considered that the rigidity of each of the first molds 91a and 91b and the second molds 92a and 92b with respect to the compressive force is different from each other due to the difference in the structure and the like of each mold. Then, when press molding is performed by applying the same compressive force, there is a difference between the respective compression strains of the first dies 91a and 91b and the second dies 92a and 92b. Therefore, the following problem occurs. In the conventional paper container manufacturing apparatus 80, the second molds 92a and 92b are considered to have lower rigidity than the first molds 91a and 91b from the configuration.
　図１５は、図１１で示した紙容器の製造装置のプレス加工時の第１金型と第２金型の位置関係を示す概略模式図であり、（１）はプレス加工開始時の状態を表す図であり、（２）は原紙を挟み込む直前の状態を表す図であり、（３）はプレス中の状態を表す図である。尚、この図１５については、図の明瞭さを重視して原紙の記載は省略している。 FIG. 15 is a schematic diagram showing the positional relationship between the first die and the second die during press working of the paper container manufacturing apparatus shown in FIG. 11, and (1) shows a state at the start of press working. (2) is a diagram showing a state immediately before sandwiching the base paper, and (3) is a diagram showing a state during pressing. In FIG. 15, the illustration of the base paper is omitted for clarity of the drawing.
　図１５の（１）を参照して、プレス加工開始時には、一対の上下移動装置８４の上方支持体８８が矢印方向に降下する。この際、対向する位置にある第１金型９１ａと９１ｂとの対向距離は、この時点での本来の距離を保っており、特に問題が無い。第２金型９２ａ、９２ｂについても同様のことが言える。 を Referring to FIG. 15A, at the start of the press working, the upper supports 88 of the pair of up-and-down moving devices 84 descend in the direction of the arrow. At this time, the opposing distance between the first dies 91a and 91b at the opposing positions maintains the original distance at this point, and there is no particular problem. The same can be said for the second molds 92a and 92b.
　次に、図１５の（２）を参照して、更に一対の上下移動装置８４の上方支持体８８が降下すると、第１金型９１ａ、９１ｂと第２金型９２ａ、９２ｂとの各々が図示しない原紙をそれぞれ挟み込む形となる。この際、各金型にはまだ完全には力がかかり切っていない状態であるため、第１金型９１ａと９１ｂとの対向距離はこの時点での本来の距離であり、特に問題が無い。第２金型９２ａ、９２ｂについても同様のことが言える。 Next, referring to FIG. 15 (2), when the upper supports 88 of the pair of vertically moving devices 84 are further lowered, the first dies 91a and 91b and the second dies 92a and 92b are illustrated. The base paper that is not used is sandwiched. At this time, since the respective molds have not yet been completely subjected to the force, the facing distance between the first molds 91a and 91b is the original distance at this time, and there is no particular problem. The same can be said for the second molds 92a and 92b.
　更に、図１５の（３）を参照して、更に一対の上下移動装置８４の上方支持体８８は、第１金型９１ａ及び第２金型９２ａの各々の下死点まで降下し、図示しない原紙には、第１金型９１ａ、９１ｂによりプレス罫線加工と、第２金型９２ａ、９２ｂにより打抜・プレス成形加工とが行われる。その際、上述のように同一の圧縮力がかかるとすると、第１金型９１ａ、９１ｂと第２金型９２ａ、９２ｂの圧縮歪の差により、上方支持体８８は全体的に第２金型側に向かって斜め下方に僅かながら傾斜する。すると、第１金型９１ａ、９１ｂとの間には上流側に向かって僅かながら広がる隙間が生じる。この隙間は、第２金型９２ａ、９２ｂの隙間に比べて大きくなると予想される。すなわち、第１金型９１ａと９１ｂとの対向距離が不均一になってしまい、本来の距離を保てなくなる。 Further, referring to (3) of FIG. 15, the upper supports 88 of the pair of vertical movement devices 84 further descend to the bottom dead center of each of the first mold 91a and the second mold 92a, and are not shown. The base paper is subjected to press ruled line processing by the first dies 91a and 91b, and punching and press forming by the second dies 92a and 92b. At this time, assuming that the same compressive force is applied as described above, the upper support 88 is entirely in the second mold due to the difference in compression strain between the first molds 91a and 91b and the second molds 92a and 92b. It inclines slightly diagonally downward toward the side. Then, a gap is generated between the first molds 91a and 91b, which slightly expands toward the upstream side. This gap is expected to be larger than the gap between the second molds 92a and 92b. That is, the facing distance between the first molds 91a and 91b becomes uneven, and the original distance cannot be maintained.
　図１６は、図１３で示した第１金型によるプレス罫線加工後の原紙の状態を示す平面図である。 FIG. 16 is a plan view showing the state of the base paper after the press crease processing by the first die shown in FIG.
　図を参照して、第１金型９１ａと９１ｂとの対向距離が不均一になっていると、第１金型全体に均等に圧縮力がかからないため、圧縮力の小さくなる上流側の罫線７５には、かすれ等の形成不良が生じやすくなる。又、それにより、その後の打抜・プレス成形工程においても成形不良が生じやすくなっていた。 Referring to the figure, if the opposing distance between the first molds 91a and 91b is not uniform, the compressive force is not evenly applied to the entire first mold, so that the upstream ruled line 75 where the compressive force is reduced. Tends to cause poor formation such as blurring. In addition, as a result, molding defects tend to occur in the subsequent punching and press molding steps.
　この傾斜方向がたとえ逆になったとしても、今度は打抜やプレス成形において均等に圧縮力がかからないため、結果として紙容器の品質は低下する。結局これは２つの金型の特性が異なれば必ず生じる問題であると言える。 と し て Even if the inclination direction is reversed, the compression force is not evenly applied in the punching or press molding, and as a result, the quality of the paper container is reduced. After all, this can be said to be a problem that always occurs if the characteristics of the two molds are different.
　この発明は、上記のような課題を解決するためになされたもので、品質が良好な紙容器を安定的に量産できる、プレス成形精度が向上した紙容器の製造装置、紙容器の製造方法及び紙容器を提供することを目的とする。 The present invention has been made in order to solve the above-described problems, and can stably mass-produce high-quality paper containers, a paper container manufacturing apparatus with improved press molding accuracy, a paper container manufacturing method, and It is intended to provide a paper container.
　上記の目的を達成するために、この発明の第１の局面における紙容器の製造装置は、第１プレス工程及び第２プレス工程によって成形される紙容器の製造装置であって、第１プレス工程を実施するための第１金型と、第１プレス工程で処理された被プレス対象物を移送する移送手段と、移送された被プレス対象物に対して第２プレス工程を実施するための第２金型と、第１金型と第２金型とが取り付けられる、一対の上下移動装置とを備え、第１金型及び第２金型の少なくとも一方であって、これらの各々を構成する上金型及び下金型の少なくとも一方には、プレス成形時の金型同士の対向距離を本来の距離に近づくように是正する是正手段が設けられるものである。 In order to achieve the above object, a paper container manufacturing apparatus according to a first aspect of the present invention is a paper container manufacturing apparatus formed by a first pressing step and a second pressing step. A first die for performing the first pressing step, a transfer means for transferring the pressed object processed in the first pressing step, and a second pressing step for performing the second pressing step on the transferred pressed object. A second mold, and a pair of up and down moving devices to which the first mold and the second mold are attached, which are at least one of the first mold and the second mold, and constitute each of these. At least one of the upper mold and the lower mold is provided with a correcting means for correcting the facing distance between the dies during press forming so as to approach the original distance.
　このように構成すると、プレス成形精度が向上する。 構成 With this configuration, the accuracy of press forming is improved.
　この発明の第２の局面における紙容器の製造装置は、プレス成形による紙容器の製造装置であって、帯状の原紙を供給する原紙供給手段と、供給された原紙の対応する位置に、成形時の皺を吸収するための罫線を形成した後、移送する罫線形成手段と、移送された原紙から、罫線の少なくとも一部を含む所望の形状のブランクシートを打ち抜くブランクシート打抜手段と、打ち抜かれたブランクシートを、その位置でプレス加工するプレス手段とを備え、罫線形成手段は、第１金型よりなり、ブランクシート打抜手段及びプレス手段は、第２金型よりなり、第１金型と第２金型とは、一対の上下移動装置に取り付けられ、少なくとも第１金型を構成する上金型及び下金型の少なくとも一方には、罫線の形成時の金型同士の対向距離を本来の距離に近づくように是正する是正手段が設けられるものである。 An apparatus for manufacturing a paper container according to a second aspect of the present invention is an apparatus for manufacturing a paper container by press molding, comprising: a base paper supply means for supplying a band-shaped base paper; After forming a ruled line for absorbing wrinkles, a ruled line forming means for transferring, a blank sheet punching means for punching a blank sheet of a desired shape including at least a part of the ruled line from the transferred base paper, Press means for press-forming the blank sheet at that position, wherein the ruled line forming means comprises a first mold, the blank sheet punching means and the press means comprise a second mold, and a first mold. And the second mold are attached to a pair of up and down moving devices, and at least one of the upper mold and the lower mold constituting the first mold has a facing distance between the molds when forming the ruled line. Of the original Corrective means for correcting so as to approach the release in which is provided.
　このように構成すると、罫線の形成精度が向上する。 構成 With this configuration, the accuracy of forming ruled lines is improved.
　この発明の第３の局面における紙容器の製造装置は、第２の局面における発明の構成において、是正手段は、下金型と下金型を支持する上下移動装置の下方支持体との間に設置された少なくとも１つのガスクッションを含むものである。 In the paper container manufacturing apparatus according to a third aspect of the present invention, in the configuration of the invention according to the second aspect, the correcting means may include a lower mold and a lower support of a vertical moving device that supports the lower mold. It includes at least one gas cushion installed.
　このように構成すると、ガスクッションに加わる力の大きさによってそのストロークが変化する。 構成 With this configuration, the stroke changes depending on the magnitude of the force applied to the gas cushion.
　この発明の第４の局面における紙容器の製造装置は、第３の局面における発明の構成において、下金型は平面視略矩形形状を有し、ガスクッションは下金型の下面コーナー部の各々に配置されるものである。 The apparatus for manufacturing a paper container according to a fourth aspect of the present invention is the configuration of the invention according to the third aspect, wherein the lower mold has a substantially rectangular shape in plan view, and the gas cushion is provided at each lower surface corner of the lower mold. It is arranged in.
　このように構成すると、上金型の傾斜方向にかかわらず常にガスクッションによる是正が生じる。 構成 With this configuration, correction by the gas cushion always occurs regardless of the inclination direction of the upper mold.
　この発明の第５の局面における紙容器の製造方法は、紙容器の製造方法であって、第１の局面から第４の局面のいずれかにおける紙容器の製造装置を用いて紙容器を製造するものである。 A method for manufacturing a paper container according to a fifth aspect of the present invention is a method for manufacturing a paper container, wherein the paper container is manufactured using the apparatus for manufacturing a paper container according to any one of the first to fourth aspects. Things.
　このように構成すると、プレス成形精度が向上する。 構成 With this configuration, the accuracy of press forming is improved.
　この発明の第６の局面における紙容器は、紙容器であって、第１の局面から第４の局面のいずれかにおける紙容器の製造装置により得られるものである。 The paper container according to the sixth aspect of the present invention is a paper container, which is obtained by the paper container manufacturing apparatus according to any one of the first to fourth aspects.
　このように構成すると、プレス成形精度が向上する。 構成 With this configuration, the accuracy of press forming is improved.
　以上説明したように、この発明の第１の局面における紙容器の製造装置は、プレス成形精度が向上するため、紙容器の品質が向上する。 As described above, in the paper container manufacturing apparatus according to the first aspect of the present invention, the press molding accuracy is improved, so that the quality of the paper container is improved.
　この発明の第２の局面における紙容器の製造装置は、罫線の形成精度が向上するため、紙容器の品質が向上する。 In the paper container manufacturing apparatus according to the second aspect of the present invention, the accuracy of forming the ruled line is improved, and thus the quality of the paper container is improved.
　この発明の第３の局面における紙容器の製造装置は、第２の局面における発明の効果に加えて、ガスクッションに加わる力の大きさによってそのストロークが変化するため、第１金型の上金型の傾斜に応じて下金型の傾斜が追従する。 In the paper container manufacturing apparatus according to the third aspect of the present invention, in addition to the effect of the invention according to the second aspect, the stroke changes depending on the magnitude of the force applied to the gas cushion. The inclination of the lower mold follows the inclination of the mold.
　この発明の第４の局面における紙容器の製造装置は、第３の局面における発明の効果に加えて、上金型の傾斜方向にかかわらず常にガスクッションによる是正が生じるため、第１金型の罫線形成動作の信頼性が向上する。 The apparatus for manufacturing a paper container according to the fourth aspect of the present invention, in addition to the effect of the invention according to the third aspect, always performs correction by the gas cushion regardless of the inclination direction of the upper mold. The reliability of the ruled line forming operation is improved.
　この発明の第５の局面における紙容器の製造方法は、プレス成形精度が向上するため、品質が向上した紙容器を製造できる。 紙 In the method for manufacturing a paper container according to the fifth aspect of the present invention, the press molding accuracy is improved, so that a paper container with improved quality can be manufactured.
　この発明の第６の局面における紙容器は、プレス成形精度が向上するため、品質が向上した紙容器となる。 紙 The paper container according to the sixth aspect of the present invention is an improved quality paper container because the press molding accuracy is improved.
この発明の第１の実施の形態による紙容器の製造装置を示す概略図である。It is a schematic diagram showing a paper container manufacturing device according to a first embodiment of the present invention. 図１で示した紙容器の製造装置の第１金型の部分を示す概略断面図であって、プレス罫線加工を行う前の状態を示す図である。FIG. 2 is a schematic cross-sectional view showing a first mold part of the paper container manufacturing apparatus shown in FIG. 1 and showing a state before press crease processing. 図２で示したＩＩＩ－ＩＩＩラインの概略断面図である。FIG. 3 is a schematic sectional view taken along line III-III shown in FIG. 2. 図１で示した紙容器の製造装置の第２金型の部分を示す概略断面図であって、打抜・プレス成形加工を行う前の状態を示す図である。FIG. 2 is a schematic cross-sectional view illustrating a second mold part of the paper container manufacturing apparatus illustrated in FIG. 1, illustrating a state before punching and press forming. 図１で示した紙容器の製造装置のプレス加工時の第１金型と第２金型の位置関係を示す概略模式図である。FIG. 2 is a schematic diagram illustrating a positional relationship between a first mold and a second mold during press working of the paper container manufacturing apparatus illustrated in FIG. 1. 図１で示した紙容器の製造装置の第１金型を含む部分を示す概略断面図であって、プレス罫線加工中の状態を示す図である。FIG. 2 is a schematic cross-sectional view illustrating a portion including a first mold of the paper container manufacturing apparatus illustrated in FIG. 1, and is a diagram illustrating a state during press crease processing. 図６で示した第１金型によるプレス罫線加工後の原紙の状態を示す平面図である。FIG. 7 is a plan view showing a state of a base paper after press crease processing by a first mold shown in FIG. 6. 図１で示した紙容器の製造装置の第２金型を含む部分を示す概略断面図であって、打抜・プレス成形加工中の状態を示す図である。FIG. 2 is a schematic cross-sectional view illustrating a portion including a second mold of the apparatus for manufacturing the paper container illustrated in FIG. 1, illustrating a state during punching and press forming. この発明の第２の実施の形態による紙容器の製造装置の第１金型の部分を示す概略断面図であって、プレス罫線加工を行う前の状態を示す図であり、図２に対応する図である。FIG. 9 is a schematic cross-sectional view showing a first mold part of a paper container manufacturing apparatus according to a second embodiment of the present invention, showing a state before press crease processing, and corresponds to FIG. 2. FIG. 従来の紙容器の外観形状を示す斜視図である。It is a perspective view which shows the external appearance shape of the conventional paper container. 従来の紙容器の製造装置を示す概略図である。It is the schematic which shows the conventional paper container manufacturing apparatus. 図１１で示した紙容器の製造装置における原紙の加工工程を示す模式図である。FIG. 12 is a schematic diagram illustrating a process of processing base paper in the paper container manufacturing apparatus illustrated in FIG. 11. 図１１で示した紙容器の製造装置の第１金型の部分を示す概略断面図である。FIG. 12 is a schematic sectional view showing a first mold part of the paper container manufacturing apparatus shown in FIG. 11. 図１１で示した紙容器の製造装置の第２金型の部分を示す概略断面図である。FIG. 12 is a schematic cross-sectional view illustrating a second mold portion of the paper container manufacturing apparatus illustrated in FIG. 11. 図１１で示した紙容器の製造装置のプレス加工時の第１金型と第２金型の位置関係を示す概略模式図である。FIG. 12 is a schematic diagram illustrating a positional relationship between a first mold and a second mold during press working of the paper container manufacturing apparatus illustrated in FIG. 11. 図１３で示した第１金型によるプレス罫線加工後の原紙の状態を示す平面図である。FIG. 14 is a plan view showing a state of the base paper after press crease processing by the first die shown in FIG. 13.
　図１は、この発明の第１の実施の形態による紙容器の製造装置を示す概略図である。 FIG. 1 is a schematic diagram showing an apparatus for manufacturing a paper container according to the first embodiment of the present invention.
　図を参照して、まず、この実施の形態による紙容器の製造装置１０によって製造される紙容器５０は、図１０で示した従来の紙容器７０と同様の構成である。 Referring to the drawing, first, a paper container 50 manufactured by the paper container manufacturing apparatus 10 according to the present embodiment has the same configuration as the conventional paper container 70 shown in FIG.
　又、この実施の形態による紙容器の製造装置１０は、従来の紙容器の製造装置と基本的には同様の構成をしている。紙容器の製造装置１０を構成する各装置及び動作について、上流側から順に簡略的に説明する。 The paper container manufacturing apparatus 10 according to this embodiment has basically the same configuration as a conventional paper container manufacturing apparatus. Each device and operation of the paper container manufacturing apparatus 10 will be briefly described in order from the upstream side.
　まず、原紙供給位置Ａ１に配置されたロール状に巻回された帯状の原紙５７は、従来と同様に原紙供給手段である供給装置１１によって表面のコーティング処理等がされた後、供給装置１１の下流側の成型装置１３へ連続的に供給される。 First, the strip-shaped base paper 57 wound in a roll disposed at the base paper supply position A1 is subjected to a surface coating process or the like by a supply device 11 which is a base paper supply unit in the same manner as in the related art. It is continuously supplied to the downstream molding device 13.
　成型装置１３は、その詳細については後述するが、一対の上下移動装置１４を備え、その上流側の罫線形成位置Ａ２においては、罫線形成手段である第１金型２１が取り付けられている。第１金型２１の下金型２１ｂと下方支持体１９との間には、ガスクッション２３ａ～２３ｄが設置されている。又、一対の上下移動装置１４の下流側の打抜・プレス加工位置Ａ３においては、ブランクシート打抜手段及びプレス手段である第２金型２２が取り付けられている。 The molding device 13 includes a pair of up and down movement devices 14, which will be described in detail later, and a first mold 21 serving as a ruled line forming means is mounted at a ruled line forming position A2 on the upstream side. Between the lower mold 21b of the first mold 21 and the lower support 19, gas cushions 23a to 23d are provided. Further, at a punching / pressing position A3 on the downstream side of the pair of vertical moving devices 14, a second die 22 as a blank sheet punching means and a pressing means is attached.
　供給装置１１から供給された原紙５７は、罫線形成位置Ａ２においては、第１金型２１によって、図１２の（２）で示したような、成形時の皺を吸収するための罫線が紙容器５０のコーナー部にあたる位置に形成される。そして、罫線が形成された原紙５７は、そのまま下流側の打抜・プレス加工位置Ａ３へ移送される。 At the ruled line forming position A2, the base paper 57 supplied from the supply device 11 has a ruled line for absorbing wrinkles at the time of molding by the first mold 21 as shown in FIG. It is formed at a position corresponding to 50 corners. Then, the base paper 57 on which the ruled lines are formed is transferred to the punching / pressing position A3 on the downstream side as it is.
　罫線が形成された原紙５７は、打抜・プレス加工位置Ａ３において、第２金型２２によって、図示しないが、罫線の少なくとも一部を含むように略正方形等の所望の形状のブランクシートとして打ち抜かれる。又、この打ち抜かれたブランクシートを、その位置で第２金型２２によって容器形状にプレス加工し、紙容器５０を成形する。 The base paper 57 on which the ruled lines are formed is punched by the second mold 22 as a blank sheet of a desired shape such as a substantially square shape so as to include at least a part of the ruled lines at the punching / pressing position A3. It is. Further, the blank sheet thus punched is pressed into a container shape by the second mold 22 at that position, and the paper container 50 is formed.
　次に、成型装置１３の第１金型２１部分及び第２金型２２部分の各々の構成について説明する。 Next, the configuration of each of the first mold 21 and the second mold 22 of the molding device 13 will be described.
　図２は、図１で示した紙容器の製造装置の第１金型の部分を示す概略断面図であって、プレス罫線加工を行う前の状態を示す図であり、図３は、図２で示したＩＩＩ－ＩＩＩラインの概略断面図である。 FIG. 2 is a schematic cross-sectional view showing a first mold part of the paper container manufacturing apparatus shown in FIG. 1, showing a state before press crease processing, and FIG. FIG. 3 is a schematic cross-sectional view of the line III-III indicated by.
　図２を参照して、第１金型２１は、上金型２１ａと下金型２１ｂとから構成され、平面視正方形形状の金型である。第１金型２１の上金型２１ａは、一対の上下移動装置の上方支持体１８に、又、第１金型２１の下金型２１ｂは下方支持体１９側に、金型同士が対向するように取り付けられている。第１金型２１の上金型２１ａの加圧端面２６のコーナー部の各々には、罫線を形成するための罫線溝２８が、又、第１金型２１の下金型２１ｂの加圧端面２７の金型のコーナー部の各々には、罫線を形成するための罫線刃２９が、それぞれ放射状に形成されている。 参照 Referring to FIG. 2, the first mold 21 is composed of an upper mold 21a and a lower mold 21b, and is a mold having a square shape in plan view. The upper mold 21a of the first mold 21 faces the upper support 18 of the pair of vertically moving devices, and the lower mold 21b of the first mold 21 faces the lower support 19, and the molds face each other. So that it is attached. Each of the corners of the pressing end surface 26 of the upper die 21a of the first die 21 has a ruled line groove 28 for forming a ruled line, and the pressing end surface of the lower die 21b of the first die 21 is formed. Ruled line blades 29 for forming ruled lines are formed radially at each of the corners of the mold 27.
　図３を併せて参照して、第１金型２１の下金型２１ｂの下面と下金型２１ｂを支持する下方支持体１９との間であって、下方支持体１９の、下金型２１ｂのコーナー部と対応する位置に、第１金型２１の上金型２１ａと下金型２１ｂとの対向距離を本来の距離に近づくように是正するための是正手段として、４つのガスクッション２３ａ～２３ｄがそれぞれ配置されている。 Referring also to FIG. 3, between the lower surface of the lower die 21b of the first die 21 and the lower support 19 supporting the lower die 21b, The four gas cushions 23a to 23c are provided as correction means for correcting the facing distance between the upper mold 21a and the lower mold 21b of the first mold 21 so as to approach the original distance at a position corresponding to the corner portion of the first mold 21. 23d are respectively arranged.
　図４は、図１で示した紙容器の製造装置の第２金型の部分を示す概略断面図であって、打抜・プレス成形加工を行う前の状態を示す図である。 FIG. 4 is a schematic sectional view showing a second mold part of the paper container manufacturing apparatus shown in FIG. 1, showing a state before punching and press forming.
　図を参照して、第２金型２２は、上金型２２ａと下金型２２ｂとから構成され、平面視正方形形状の金型である。第２金型２２の上金型２２ａは、一対の上下移動装置の上方支持体１８に、又、第２金型２２の下金型２２ｂは下方支持体１９に、金型同士が対向するように取り付けられている。 Referring to the drawing, the second mold 22 is composed of an upper mold 22a and a lower mold 22b, and is a mold having a square shape in plan view. The upper mold 22a of the second mold 22 faces the upper support 18 of the pair of vertical moving devices, and the lower mold 22b of the second mold 22 faces the lower support 19, so that the molds face each other. Attached to.
　第２金型２２の上金型２２ａの上型部材３８の加圧端面３６は、例えば、従来例の図１０で示す紙容器７０の底部７１及び側壁部７２に対応した形状に形成されている。第２金型２２の下金型２２ｂの下型部材３９の加圧端面３７は、上金型２２ａの上型部材３８の加圧端面３６に対応した形状に形成されている。 The pressing end surface 36 of the upper die member 38 of the upper die 22a of the second die 22 is formed in a shape corresponding to, for example, the bottom 71 and the side wall 72 of the paper container 70 shown in FIG. . The pressing end surface 37 of the lower die member 39 of the lower die 22b of the second die 22 is formed in a shape corresponding to the pressing end surface 36 of the upper die member 38 of the upper die 22a.
　又、第２金型２２の上金型２２ａの上型部材３８は、上方支持体１８に対して上下方向に移動自在である。又、上金型２２ａの上型部材３８の外周側には昇降部材３１が配置されており、昇降部材３１の下端面の外端縁には、図示しない下外径刃先が設けられている。更に、昇降部材３１の外周側には、上方支持体１８に対して上下方向に移動自在な外枠部材３２が配置されている。 The upper mold member 38 of the upper mold 22 a of the second mold 22 is vertically movable with respect to the upper support 18. An elevating member 31 is arranged on the outer peripheral side of the upper die member 38 of the upper mold 22a, and a lower outer diameter cutting edge (not shown) is provided at an outer edge of a lower end surface of the elevating member 31. Further, an outer frame member 32 that is vertically movable with respect to the upper support 18 is disposed on the outer peripheral side of the elevating member 31.
　第２金型２２の下金型２２ｂの下型部材３９の外周側には、その上端面が昇降部材３１の下端面の下方に位置すると共に、下方支持体１９に対して上下方向に移動自在なカーリング部材３３が配置されている。更に、カーリング部材３３の外周側には、その上端面が外枠部材３２の下端面の下方に位置する固定部材３４が配置されている。尚、固定部材３４の上端面の内端縁には、図示しない上外径刃先が設けられている。 On the outer peripheral side of the lower mold member 39 of the lower mold 22 b of the second mold 22, the upper end surface thereof is located below the lower end surface of the elevating member 31, and is vertically movable with respect to the lower support 19. The curling member 33 is disposed. Further, a fixing member 34 whose upper end surface is located below the lower end surface of the outer frame member 32 is disposed on the outer peripheral side of the curling member 33. An upper outer diameter cutting edge (not shown) is provided at an inner edge of the upper end surface of the fixing member 34.
　次に、プレス加工時における成型装置１３の動作と金型同士の位置関係について概略的に説明する。ここでは、その構成から、従来のものと同様、第２金型２２の方が第１金型２１に比べて剛性が低いものと考えられる。 Next, the operation of the molding device 13 and the positional relationship between the dies during the press working will be schematically described. Here, from the configuration, it is considered that the second mold 22 has lower rigidity than the first mold 21 as in the conventional case.
　図５は、図１で示した紙容器の製造装置のプレス加工時の第１金型と第２金型の位置関係を示す概略模式図であり、（１）はプレス加工開始時の状態を表す図であり、（２）は原紙を挟み込む直前の状態を表す図であり、（３）はプレス中の状態を表す図である。尚、この図５については、図の明瞭さを重視して原紙の記載は省略している。 FIG. 5 is a schematic diagram showing a positional relationship between a first mold and a second mold during press working of the paper container manufacturing apparatus shown in FIG. 1, and (1) shows a state at the start of press working. (2) is a diagram showing a state immediately before sandwiching the base paper, and (3) is a diagram showing a state during pressing. In FIG. 5, the illustration of the base paper is omitted for clarity of the figure.
　図５の（１）を参照して、プレス加工開始時には、従来の紙容器の製造装置と同様に、一対の上下移動装置１４の上方支持体１８が矢印方向に降下する。この際、原紙５７を挟んで対向する位置にある第１金型２１の上金型２１ａと下金型２１ｂとの対向距離は、この時点での本来の距離を保っており、従来の紙容器の製造装置と同様、特に問題が無い。第２金型２２についても同様のことが言える。 （Referring to (1) of FIG. 5, at the start of press working, the upper supports 18 of the pair of vertical moving devices 14 descend in the direction of the arrow similarly to the conventional paper container manufacturing apparatus. At this time, the facing distance between the upper mold 21a and the lower mold 21b of the first mold 21 at the position facing each other with the base paper 57 interposed therebetween maintains the original distance at this time, and the conventional paper container There is no particular problem as in the case of the manufacturing apparatus of (1). The same can be said for the second mold 22.
　次に、図５の（２）を参照して、更に一対の上下移動装置１４の上方支持体１８が降下すると、従来の紙容器の製造装置と同様に、第１金型２１の上金型２１ａ、下金型２１ｂと第２金型２２の上金型２２ａ、下金型２２ｂとの各々が、図示しない原紙をそれぞれ挟み込む形となる。この際、各金型にはまだ完全には力がかかり切っていない状態であるため、第１金型２１の上金型２１ａと下金型２１ｂとの対向距離はこの時点での本来の距離であり、従来の紙容器の製造装置と同様、特に問題が無い。第２金型２２についても同様のことが言える。 Next, referring to (2) of FIG. 5, when the upper supports 18 of the pair of vertically moving devices 14 are further lowered, the upper mold of the first mold 21 is moved similarly to the conventional paper container manufacturing apparatus. Each of the lower mold 21a, the lower mold 21b, and the upper mold 22a and the lower mold 22b of the second mold 22 sandwiches a base paper (not shown). At this time, since the forces have not yet been completely applied to the respective dies, the facing distance between the upper die 21a and the lower die 21b of the first die 21 is the original distance at this time. As with the conventional paper container manufacturing apparatus, there is no particular problem. The same can be said for the second mold 22.
　更に、図５の（３）を参照して、更に一対の上下移動装置１４の上方支持体１８は、従来の紙容器の製造装置と同様に、第１金型２１の上金型２１ａ及び第２金型２２の上金型２２ａの各々が降下し、図示しない原紙は、第１金型２１によりプレス罫線加工が、第２金型２２により打抜・プレス成形加工とが並行して行われる。その際、同一の圧縮力がかかるとすると、第１金型２１と第２金型２２の圧縮歪の差により、上方支持体１８は全体的に第２金型２２側に向かって斜め下方に僅かながら傾斜する。そのため、第１金型２１の上金型２１ａと下金型２１ｂとの間には上流側に向かって僅かながら広がる隙間が生じる。この隙間は、第２金型２２の上金型２２ａと下金型２２ｂとの隙間に比べて大きくなると予想される。この場合、従来の構成であれば、特に第１金型２１の上金型２１ａと下金型２１ｂとの対向距離が不均一になってしまい、その時点での本来の距離を保てなくなり罫線の形成が不均一になる。しかし、この第１の実施の形態による構成では、ガスクッション２３ａ～２３ｄが第１金型２１の下金型２１ｂに作用し、第１金型２１の上金型２１ａと下金型２１ｂとの対向距離がその時点での本来の距離に近づくように是正される。 Further, referring to FIG. 5C, the upper supports 18 of the pair of up-and-down moving devices 14 further include an upper mold 21a and a second mold 21 of the first mold 21 in the same manner as the conventional paper container manufacturing apparatus. Each of the upper molds 22a of the second mold 22 is lowered, and the base paper (not shown) is subjected to press crease processing by the first mold 21 and punching and press forming by the second mold 22 in parallel. . At this time, assuming that the same compressive force is applied, the upper support 18 as a whole is obliquely downward toward the second mold 22 due to the difference in compression strain between the first mold 21 and the second mold 22. Incline slightly. For this reason, a gap is generated between the upper mold 21a and the lower mold 21b of the first mold 21 slightly expanding toward the upstream side. This gap is expected to be larger than the gap between the upper mold 22a and the lower mold 22b of the second mold 22. In this case, in the case of the conventional configuration, the facing distance between the upper mold 21a and the lower mold 21b of the first mold 21 becomes non-uniform, and the original distance at that time cannot be maintained. Formation becomes uneven. However, in the configuration according to the first embodiment, the gas cushions 23a to 23d act on the lower mold 21b of the first mold 21 and the upper mold 21a and the lower mold 21b of the first mold 21 are connected to each other. The opposing distance is corrected so as to approach the original distance at that time.
　引き続き、具体的な是正動作について説明する。 Continuous corrective actions will now be described.
　図６は、図１で示した紙容器の製造装置の第１金型を含む部分を示す概略断面図であって、プレス罫線加工中の状態を示す図である。 FIG. 6 is a schematic sectional view showing a part including the first mold of the apparatus for manufacturing the paper container shown in FIG. 1, and is a view showing a state during press crease processing.
　図を参照して、第１金型２１の上金型２１ａは、上述したように、図５の（３）の段階で上方支持体１８の傾斜に合わせて下流側に僅かながらに傾斜する。そのため、第１金型２１の下金型２１ｂの下流側に先に第１金型２１の上金型２１ａが接触して力がかかることになる。すると、第１金型２１の下金型２１ｂの下面に配置されたガスクッション２３ａ～２３ｄの内、下流側のガスクッション２３ｂ、２３ｄのロッド２４ｂ、２４ｄが下降する。又、それに対応するように、上流側のガスクッション２３ａ、２３ｃのロッド２４ａ、２４ｃが上昇する。すなわち、ガスクッション２３ａ、２３ｃのロッド２４ａ、２４ｃのストロークＸは、ガスクッション２３ｂ、２３ｄのロッド２４ｂ、２４ｄのストロークＹより長くなる。このように、第１金型の２１の下金型２１ｂは第１金型２１の上金型２１ａの傾斜に追従し、結果として金型同士の対向距離はこの時点での本来の距離に近づくように是正される。 Referring to the drawing, the upper mold 21a of the first mold 21 is slightly inclined to the downstream side in accordance with the inclination of the upper support 18 at the stage of (3) in FIG. Therefore, the upper mold 21a of the first mold 21 contacts the downstream side of the lower mold 21b of the first mold 21 first, and a force is applied. Then, of the gas cushions 23a to 23d arranged on the lower surface of the lower mold 21b of the first mold 21, the rods 24b and 24d of the gas cushions 23b and 23d on the downstream side descend. In addition, the rods 24a, 24c of the gas cushions 23a, 23c on the upstream side rise correspondingly. That is, the stroke X of the rods 24a, 24c of the gas cushions 23a, 23c is longer than the stroke Y of the rods 24b, 24d of the gas cushions 23b, 23d. As described above, the lower mold 21b of the first mold 21 follows the inclination of the upper mold 21a of the first mold 21, and as a result, the facing distance between the molds approaches the original distance at this time. Will be corrected.
　図７は、図６で示した第１金型によるプレス罫線加工後の原紙の状態を示す平面図である。 FIG. 7 is a plan view showing the state of the base paper after the press crease processing by the first mold shown in FIG.
　図を参照して、第１金型２１の上金型２１ａと下金型２１ｂの対向距離が本来の距離に近づくように是正されていることから、第１金型２１全体に均等に圧縮力がかかることになる。そのため、原紙５７にはかすれ等がない精度の高い罫線５５が形成される。 Referring to the figure, since the facing distance between the upper mold 21a and the lower mold 21b of the first mold 21 is corrected so as to approach the original distance, the compressive force is uniformly applied to the entire first mold 21. It will take. Therefore, a highly accurate ruled line 55 without blurring is formed on the base paper 57.
　次に、図１の打抜・プレス加工位置Ａ３における第２金型２２の具体的な構造及び動作について概略的に説明する。 Next, a specific structure and operation of the second mold 22 at the punching / pressing position A3 in FIG. 1 will be schematically described.
　図８は、図１で示した紙容器の製造装置の第２金型を含む部分を示す概略断面図であって、打抜・プレス成形加工中の状態を示す図である。 FIG. 8 is a schematic cross-sectional view showing a portion including the second mold of the apparatus for manufacturing the paper container shown in FIG. 1, showing a state during punching and press forming.
　図を参照して、まず、第２金型２２の上金型２２ａと下金型２２ｂとの間に移送された原紙５７を、図６で示した罫線５５の部分がこれらの間となる所定の位置で一旦停止する。そして、図５の（１）～（３）の手順により、所定の圧縮力で打抜・プレス成形加工を行う。すると、まず、第２金型２２の昇降部材３１の上外径刃先と、第２金型２２の固定部材３４の下外径刃先とが摺接して原紙５７が所望の形状に切断され、ブランクシートが打ち抜かれる。 Referring to the figure, first, the base paper 57 transferred between the upper mold 22a and the lower mold 22b of the second mold 22 is moved to a predetermined position where the ruled line 55 shown in FIG. Stop at the position of. Then, according to the procedures (1) to (3) in FIG. 5, punching and press forming are performed with a predetermined compression force. Then, first, the upper outer diameter cutting edge of the elevating member 31 of the second mold 22 and the lower outer diameter cutting edge of the fixing member 34 of the second mold 22 are brought into sliding contact with each other, and the base paper 57 is cut into a desired shape. The sheet is punched.
　そして、ブランクシートを打ち抜いた状態のまま、更に第２金型２２の上金型２２ａの上型部材３８を降下させる。すると、第２金型２２の上型部材３８と下型部材３９との各々の加圧端面３６、３７によって、ブランクシートが容器形状にプレスされる。この際、先の罫線形成の工程において精度の高い罫線がブランクシートには形成されているため、コーナー部に皺が適切に寄りやすくなり、成形時の品質を安定させることができる。 Then, the upper die member 38 of the second die 22 is further lowered while the blank sheet is punched out. Then, the blank sheet is pressed into a container shape by the pressing end faces 36 and 37 of the upper mold member 38 and the lower mold member 39 of the second mold 22. At this time, since a high-precision ruled line is formed in the blank sheet in the previous ruled line forming step, wrinkles are likely to be appropriately brought to the corners, and the quality at the time of molding can be stabilized.
　そして、ブランクシートの端部が、昇降部材３１とカーリング部材３３とによって形成されるカール溝４１内に位置するまで第２金型２２の上金型２２ａを降下させた後、その位置から第２金型２２の上金型２２ａを上昇させる。 Then, after lowering the upper mold 22a of the second mold 22 until the end of the blank sheet is positioned in the curl groove 41 formed by the elevating member 31 and the curling member 33, the second sheet is moved from the position to the second mold 22a. The upper mold 22a of the mold 22 is raised.
　すると、昇降部材３１及びカーリング部材３３が上昇し、ブランクシートの端部がカール溝４１によって巻かれ、縁巻５３が形成される。これによって、従来例の図１０で示した紙容器７０のような、縁巻５３を有する略正方形の紙容器５０が製造される。 Then, the elevating member 31 and the curling member 33 are raised, and the end of the blank sheet is wound by the curl groove 41 to form an edge winding 53. As a result, a substantially square paper container 50 having a rim 53 like the conventional paper container 70 shown in FIG. 10 is manufactured.
　尚、第２金型２２においても、上方支持体１８の傾斜は生じているが、下流側に傾斜しているために、傾斜から生まれる第２金型２２の上金型２２ａと下金型２２ｂとの隙間は相対的に小さく、又、そのバラツキも少ないと言える。すなわち、この隙間のバラツキは、第２金型２２の圧縮歪やクリアランス等により吸収され、対向距離が本来の距離とはならない問題はほとんど影響しないものと考えられる。 In the second mold 22, the upper support 18 is also inclined, but is inclined downstream, so that the upper mold 22a and the lower mold 22b of the second mold 22 generated by the inclination. Can be said to be relatively small, and the variation is small. In other words, it is considered that the variation in the gap is absorbed by the compression strain and the clearance of the second mold 22, and the problem that the facing distance does not become the original distance is hardly affected.
　このように、第１金型２１の対向距離を是正する是正手段として図２に示すガスクッション２３ａ～２３ｄを設けることにより、罫線５５の形成精度が向上するため、成形される紙容器５０の品質が向上する。又、ガスクッション２３ａ～２３ｄに加わる力の大きさによってそのストロークが変化するため、第１金型２１の上金型２１ａの傾斜に応じて下金型２１ｂの傾斜が追従する。更に、４個のガスクッション２３ａ～２３ｄを配置しているため、第１金型２１の上金型２１ａの傾斜方向にかかわらず常にガスクッション２３ａ～２３ｄによる是正が生じるため、第１金型２１の罫線形成動作の信頼性が更に向上する。 As described above, by providing the gas cushions 23a to 23d shown in FIG. 2 as a correcting means for correcting the facing distance of the first mold 21, the accuracy of forming the ruled line 55 is improved. Is improved. Further, since the stroke changes according to the magnitude of the force applied to the gas cushions 23a to 23d, the inclination of the lower mold 21b follows the inclination of the upper mold 21a of the first mold 21. Further, since the four gas cushions 23a to 23d are arranged, correction is always performed by the gas cushions 23a to 23d irrespective of the inclination direction of the upper mold 21a of the first mold 21. Of the ruled line forming operation is further improved.
　図９は、この発明の第２の実施の形態による紙容器の製造装置の第１金型の部分を示す概略断面図であって、プレス罫線加工を行う前の状態を示す図であり、図２に対応する図である。 FIG. 9 is a schematic cross-sectional view showing a first mold portion of the paper container manufacturing apparatus according to the second embodiment of the present invention, showing a state before press crease processing. It is a figure corresponding to No. 2.
　図を参照して、この第２の実施の形態による紙容器の製造装置は、罫線形成位置Ａ２において、是正手段としてのガスクッションがジョイント部材４３に置き換えられた構成である。その他の構成は、第１の実施の形態と同様であるため、ここでの説明は繰り返さない。 Referring to the drawing, the paper container manufacturing apparatus according to the second embodiment has a configuration in which a gas cushion as correction means is replaced with a joint member 43 at a ruled line forming position A2. Other configurations are the same as those of the first embodiment, and thus description thereof will not be repeated.
　この第２の実施の形態の紙容器の製造装置は、全体としては図示しないが、第１金型２１の下金型２１ｂの下面と一対の上下移動装置１４の下方支持体１９との間に、罫線形成時の金型同士の対向距離を本来の距離に近づくように是正する是正手段であるジョイント部材４３を備えている。ジョイント部材４３は、上部材４４と下部材４５とを備え、上部材４４は、上部材４４と下部材４５を挿通する一本の軸体４６を軸に下部材４５に対して回動自在に接続されている。 Although not shown as a whole, the paper container manufacturing apparatus according to the second embodiment is arranged between the lower surface of the lower mold 21b of the first mold 21 and the lower support 19 of the pair of vertical moving devices 14. The joint member 43 is a correcting means for correcting the facing distance between the dies at the time of forming the ruled line so as to approach the original distance. The joint member 43 includes an upper member 44 and a lower member 45, and the upper member 44 is rotatable with respect to the lower member 45 around a single shaft 46 through which the upper member 44 and the lower member 45 are inserted. It is connected.
　尚、ジョイント部材４３の上部材４４は、第１金型２１の下金型２１ｂの下面の中央部分に取り付けられ、ジョイント部材４３の下部材４５は、上下移動装置１４の下方支持体１９上の対応する位置に固定されている。その際、軸体４６の軸方向が、第１金型２１の下金型２１ｂの上流－下流側方向に対して直交するように取り付けられている。これにより、第１金型２１の下金型２１ｂは、上流－下流側方向に回動（傾斜）自在となっている。 The upper member 44 of the joint member 43 is attached to the center of the lower surface of the lower mold 21b of the first mold 21, and the lower member 45 of the joint member 43 is mounted on the lower support 19 of the vertical moving device 14. It is fixed in the corresponding position. At this time, the shaft 46 is attached so that the axial direction of the shaft 46 is orthogonal to the upstream-downstream direction of the lower mold 21b of the first mold 21. Thus, the lower mold 21b of the first mold 21 is rotatable (tilted) in the upstream-downstream direction.
　尚、プレス罫線加工前の状態において第１金型２１の下金型２１ｂの水平度を保つために、図示はしていないが、第１金型２１の下金型２１ｂのコーナー部にスプリング等を設けてもよい。 In order to maintain the horizontality of the lower mold 21b of the first mold 21 before the press crease processing, a spring or the like is provided at a corner of the lower mold 21b of the first mold 21 although not shown. May be provided.
　ここで、図５を再度参照して、第１の実施の形態と同様にプレス加工を行うと、図５の（３）の段階で第１の実施の形態と同様の上方支持体１８の傾斜が生じ、第１金型２１の下金型２１ｂの下流側に先に力がかかることになる。ここで、ジョイント部材４３の上部材４４が下流側に向かって軸体４６を軸に下方に回動する。これにより、第１金型２１の下金型２１ｂは、下流側が下降し、上流側が上昇することになる。よって、第１金型の２１の下金型２１ｂは第１金型２１の上金型２１ａの傾斜に追従し、金型同士の対向距離はこの時点での本来の距離に近づくように是正される。 Here, referring to FIG. 5 again, when the press working is performed in the same manner as in the first embodiment, the inclination of the upper support 18 similar to that in the first embodiment in the stage of (3) in FIG. Is generated, and a force is first applied to the downstream side of the lower mold 21b of the first mold 21. Here, the upper member 44 of the joint member 43 rotates downward about the shaft 46 toward the downstream side. As a result, the lower die 21b of the first die 21 moves down on the downstream side and rises on the upstream side. Therefore, the lower mold 21b of the first mold 21 follows the inclination of the upper mold 21a of the first mold 21, and the facing distance between the molds is corrected so as to approach the original distance at this time. You.
　これによって、第１の実施の形態と同様に、図７で示した罫線５５の形成精度が向上するため、成形される紙容器５０の品質が向上する。 This improves the accuracy of forming the ruled line 55 shown in FIG. 7 and improves the quality of the paper container 50 to be formed, as in the first embodiment.
　尚、上記の各実施の形態では、一対の上下移動装置に取り付けた第１金型及び第２金型によってプレス罫線加工と打抜・プレス成形加工を行う構成であったが、加工内容はこれに限らない。例えば、第１のプレス工程として加熱工程を、第２のプレス工程として成形工程とを続いて行う構成のように、他のプレス加工によるものであってもよい。 In each of the above embodiments, the press crease processing and the punching / press forming are performed by the first die and the second die attached to the pair of vertical moving devices. Not limited to For example, another pressing process may be used, such as a configuration in which a heating process is performed as a first pressing process and a molding process is performed subsequently as a second pressing process.
　又、上記の各実施の形態では、帯状の原紙にプレス罫線加工及び打抜・プレス成形加工を施す構成であったが、初めから所定の形状に打ち抜かれたブランクシートにプレス罫線加工及びプレス成形加工を行う構成であってもよい。 Further, in each of the above-described embodiments, the configuration is such that the strip-shaped base paper is subjected to the press crease processing and the punching / press forming. However, the blank sheet punched into a predetermined shape from the beginning is subjected to the press crease processing and the press forming. Processing may be performed.
　更に、上記の各実施の形態では、是正手段は第１金型の下金型に設けられるものであったが、これに限らない。すなわち、第１金型の上金型及び下金型、並びに、第２金型の上金型及び下金型の４つの金型のうち少なくとも１つに設けられていればよい。 Further, in each of the above embodiments, the correcting means is provided in the lower die of the first die, but is not limited to this. That is, at least one of the upper mold and the lower mold of the first mold and the upper mold and the lower mold of the second mold may be provided.
　更に、上記の第１の実施の形態では、是正手段であるガスクッションのストロークが、ガスクッションに加わる力の大きさによって変化することで、上金型に下金型を追従させるものであったがこれに限らない。上金型と下金型の対向距離を本来の距離に近づくように是正できれば、ガスクッションが別の方法で作用するものであってもよい。
更に、上記の各実施の形態では、是正手段はガスクッションやジョイント部材からなるものであったが、金型の対向距離を是正できるものであれば、金型の取付側全面をゴムやバネ等の弾性体で支持すること、又は、オイルクッション等やボールジョイント等他の手段を採用してもよい。 Further, in the first embodiment, the stroke of the gas cushion, which is the correcting means, changes according to the magnitude of the force applied to the gas cushion, so that the lower mold follows the upper mold. However, it is not limited to this. The gas cushion may be operated by another method as long as the facing distance between the upper mold and the lower mold can be corrected so as to approach the original distance.
Further, in each of the above embodiments, the correcting means is composed of a gas cushion or a joint member. However, if it is possible to correct the facing distance of the mold, the entire mounting side of the mold is made of rubber, spring, or the like. Alternatively, other means such as an oil cushion or a ball joint may be employed.
　更に、上記の第１の実施の形態では、ガスクッションは第１金型の下金型のコーナー部に合わせて４つ配置されていたが、少なくとも１つ配置されていればよい。 Further, in the above-described first embodiment, four gas cushions are arranged at the corners of the lower mold of the first mold, but at least one gas cushion may be arranged.
　更に、上記の各実施の形態では、２つのプレス工程からなるものを前提としているが、３つ以上のプレス工程からなるものであっても、一対の上下移動装置にそれらの金型を取り付けるものであれば同様に適用できる。 Furthermore, in each of the above-described embodiments, it is assumed that the pressing process includes two pressing processes. However, even if the pressing process includes three or more pressing processes, the die is attached to a pair of vertical moving devices. If so, the same can be applied.
　更に、上記の各実施の形態は、紙容器の製造装置に関するものであったが、上記の各実施の形態の紙容器の製造装置を用いて紙容器を製造する方法についての実施の形態としても同様に適用できる。 Further, each of the embodiments described above relates to a paper container manufacturing apparatus. However, the embodiments described above also relate to a method of manufacturing a paper container using the paper container manufacturing apparatus of each of the above embodiments. The same applies.
　更に、上記の各実施の形態は、紙容器の製造装置に関するものであったが、上記の各実施の形態の紙容器の製造装置により得られる紙容器についての実施の形態としても同様に適用できる。 Further, each of the embodiments described above relates to a paper container manufacturing apparatus, but can be similarly applied to the embodiment of a paper container obtained by the paper container manufacturing apparatus of each of the above embodiments. .
　以上のように、本発明に係る紙容器の製造装置、紙容器の製造方法及び紙容器によれば、食品等の収納に好適に用いることができる収納容器が得られる。

  As described above, according to the paper container manufacturing apparatus, the paper container manufacturing method, and the paper container according to the present invention, a storage container that can be suitably used for storing foods and the like is obtained.

Claims (6)

  1. 　第１プレス工程及び第２プレス工程によって成形される紙容器の製造装置（１０）であって、
    　前記第１プレス工程を実施するための第１金型（２１）と、
    　前記第１プレス工程で処理された被プレス対象物（５７）を移送する移送手段と、
    　前記移送された被プレス対象物に対して前記第２プレス工程を実施するための第２金型（２２）と、
    　前記第１金型と前記第２金型とが取り付けられる、一対の上下移動装置（１４）とを備え、
    　前記第１金型及び前記第２金型の少なくとも一方であって、これらの各々を構成する上金型（２１ａ、２２ａ）及び下金型（２１ｂ、２２ｂ）の少なくとも一方には、プレス成形時の金型同士の対向距離を本来の距離に近づくように是正する是正手段（２３ａ～２３ｄ、４３）が設けられる、紙容器の製造装置。     An apparatus (10) for manufacturing a paper container formed by a first pressing step and a second pressing step,
    A first mold (21) for performing the first pressing step;
    A transfer means for transferring the pressed object (57) processed in the first pressing step;
    A second mold (22) for performing the second pressing step on the transferred object to be pressed;
    A pair of up and down moving devices (14) to which the first mold and the second mold are attached,
    At least one of the first mold and the second mold, and at least one of the upper mold (21a, 22a) and the lower mold (21b, 22b) constituting each of them, is press-molded. A paper container manufacturing apparatus provided with correction means (23a to 23d, 43) for correcting the facing distance between the dies to approach the original distance.
  2. 　プレス成形による紙容器の製造装置（１０）であって、
    　帯状の原紙（５７）を供給する原紙供給手段（１１）と、
    　前記供給された原紙の対応する位置に、成形時の皺を吸収するための罫線（５５）を形成した後、移送する罫線形成手段（２１）と、
    　前記移送された原紙から、前記罫線の少なくとも一部を含む所望の形状のブランクシートを打ち抜くブランクシート打抜手段（２２）と、
    　前記打ち抜かれたブランクシートを、その位置でプレス加工するプレス手段（２２）とを備え、
    　前記罫線形成手段は、第１金型（２１）よりなり、
    　前記ブランクシート打抜手段及び前記プレス手段は、第２金型（２２）よりなり、
    　前記第１金型と前記第２金型とは、一対の上下移動装置（１４）に取り付けられ、
    　少なくとも前記第１金型を構成する上金型（２１ａ）及び下金型（２１ｂ）の少なくとも一方には、罫線の形成時の金型同士の対向距離を本来の距離に近づくように是正する是正手段（２３ａ～２３ｄ、４３）が設けられる、紙容器の製造装置。     An apparatus (10) for producing a paper container by press molding,
    Base paper supply means (11) for supplying a band-shaped base paper (57);
    A ruled line forming means (21) for forming a ruled line (55) for absorbing wrinkles during molding at a position corresponding to the supplied base paper and then transferring the ruled line;
    Blank sheet punching means (22) for punching a blank sheet of a desired shape including at least a part of the ruled line from the transferred base paper;
    Press means (22) for press-working the punched blank sheet at that position,
    The ruled line forming means comprises a first mold (21),
    The blank sheet punching means and the pressing means comprise a second mold (22),
    The first mold and the second mold are attached to a pair of up and down moving devices (14),
    At least one of the upper mold (21a) and the lower mold (21b) constituting the first mold corrects the facing distance between the molds at the time of forming the ruled line so as to approach the original distance. An apparatus for manufacturing a paper container provided with means (23a to 23d, 43).
  3. 　前記是正手段は、前記下金型と前記下金型を支持する前記上下移動装置の下方支持体（１９）との間に設置された少なくとも１つのガスクッション（２３ａ～２３ｄ）を含む、請求項２記載の紙容器の製造装置。 The correcting means includes at least one gas cushion (23a to 23d) installed between the lower mold and a lower support (19) of the vertically moving device that supports the lower mold. 3. The apparatus for manufacturing a paper container according to 2.
  4. 　前記下金型は平面視略矩形形状を有し、前記ガスクッションは前記下金型の下面コーナー部の各々に配置される、請求項３記載の紙容器の製造装置。 4. The apparatus for manufacturing a paper container according to claim 3, wherein the lower mold has a substantially rectangular shape in a plan view, and the gas cushion is disposed at each of lower surface corners of the lower mold. 5.
  5. 　請求項１から請求項４のいずれかに記載の紙容器の製造装置を用いて紙容器（５０）を製造する、紙容器の製造方法。 A method for manufacturing a paper container, comprising manufacturing the paper container (50) using the apparatus for manufacturing a paper container according to any one of claims 1 to 4.
  6. 　請求項１から請求項４のいずれかに記載の紙容器の製造装置により得られる、紙容器（５０）。

          A paper container (50) obtained by the paper container manufacturing apparatus according to any one of claims 1 to 4.

PCT/JP2018/029862 2018-08-09 2018-08-09 Paper container production device, paper container production method, and paper container WO2020031318A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230137305A (en) 2021-02-10 2023-10-04 가부시키가이샤 시세이도 cosmetics

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5140882A (en) * 1990-02-06 1992-08-25 Peerless Machine & Tool Corporation Assembly for severing sheet material
JP2004136547A (en) * 2002-10-17 2004-05-13 Rengo Co Ltd Method for molding sheet material and press movable mold
JP2004231223A (en) * 2003-01-29 2004-08-19 Shizuo Sato Paper protector for fruits
JP2011212882A (en) * 2010-03-31 2011-10-27 Toyo Aluminum Ekco Products Kk Method and device of manufacturing paper container

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5140882A (en) * 1990-02-06 1992-08-25 Peerless Machine & Tool Corporation Assembly for severing sheet material
JP2004136547A (en) * 2002-10-17 2004-05-13 Rengo Co Ltd Method for molding sheet material and press movable mold
JP2004231223A (en) * 2003-01-29 2004-08-19 Shizuo Sato Paper protector for fruits
JP2011212882A (en) * 2010-03-31 2011-10-27 Toyo Aluminum Ekco Products Kk Method and device of manufacturing paper container

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230137305A (en) 2021-02-10 2023-10-04 가부시키가이샤 시세이도 cosmetics

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