WO2024195156A1 - テープ貼り端面処理装置およびテープ貼り端面処理方法 - Google Patents

テープ貼り端面処理装置およびテープ貼り端面処理方法 Download PDF

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Publication number
WO2024195156A1
WO2024195156A1 PCT/JP2023/034174 JP2023034174W WO2024195156A1 WO 2024195156 A1 WO2024195156 A1 WO 2024195156A1 JP 2023034174 W JP2023034174 W JP 2023034174W WO 2024195156 A1 WO2024195156 A1 WO 2024195156A1
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WIPO (PCT)
Prior art keywords
tape
blank
adhesive
welding
end surface
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PCT/JP2023/034174
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English (en)
French (fr)
Japanese (ja)
Inventor
悠生 佐藤
太郎 門田
一真 青木
Original Assignee
東罐興業株式会社
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Application filed by 東罐興業株式会社 filed Critical 東罐興業株式会社
Priority to JP2025508110A priority Critical patent/JPWO2024195156A1/ja
Publication of WO2024195156A1 publication Critical patent/WO2024195156A1/ja

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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
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F5/00—Attaching together sheets, strips or webs; Reinforcing edges
    • B31F5/06—Attaching together sheets, strips or webs; Reinforcing edges by adhesive tape
    • B31F5/08—Attaching together sheets, strips or webs; Reinforcing edges by adhesive tape for reinforcing edges ; Applying a strip or tape to an edge, e.g. for decorating, for protecting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H37/00—Article or web delivery apparatus incorporating devices for performing specified auxiliary operations
    • B65H37/04—Article or web delivery apparatus incorporating devices for performing specified auxiliary operations for securing together articles or webs, e.g. by adhesive, stitching or stapling

Definitions

  • the present invention relates to a technology for waterproofing the edges of blanks for forming paper containers such as paper cups, and in particular to a tape application edge treatment device and tape application edge treatment method for covering the edges of blanks with tape.
  • the material for paper containers such as paper cups has been a paper laminate in which a resin layer is laminated as a water-stopping layer on the surface of the base paper (paper substrate) that will face the inside of the container, since the base paper alone has poor water resistance and gas barrier properties.
  • the inverted truncated cone-shaped body of a paper cup is formed by rolling a blank punched out into a fan shape, overlapping it so that one side end (the glued end) is on the inner side and the other side end is on the outer side, and gluing it liquid-tightly. It is known, however, that the end face of one side end of the blank that will be on the inner side is treated so that the base paper is not exposed and water resistance is ensured.
  • Examples of end treatments include skive hemming, in which the outer surface of the side end of the blank is cut to roughly half its thickness, and the remaining half-thick portion is folded back to the outer surface and glued to the cut-out portion without any gaps (see, for example, Patent Document 1); covering, in which a film of the length in the length direction is prepared, cut into short pieces and attached to upper and lower sealing bars, and the blank is inserted into the narrow gap and heat sealed from above and below; and covering, in which a resin film is laminated onto the surface of the base paper as a waterproof layer, cut with the edges protruding from the side edge of the base paper, folded back, and attached to the back surface (see, for example, Patent Documents 2 and 3).
  • JP 2003-312636 A JP 2012-020769 A Japanese Unexamined Patent Publication No. 52-138280 Japanese Unexamined Patent Publication No. 57-063241 Japanese Patent Application Publication No. 11-157526 Patent No. 5211849
  • the present invention is intended to solve the above problems, and its purpose is to provide a tape application end surface processing device and tape application end surface processing method that has a simple structure, prevents tape wrinkles and curling, and other bonding defects, even when blank end surface processing is performed at high speed, and can automatically fold the tape back to the back side of the blank while transporting the blank, thereby enabling end surface processing with tape to be performed in a short time with a high yield and resulting in high production efficiency.
  • the present invention relates to a tape application end surface treatment device that applies a long tape to an adhesive end surface of a blank to cover the end surface of the adhesive end surface of the blank, and a conveying mechanism for conveying the blank along a conveying path;
  • a blank heating mechanism, a tape bonding mechanism, a tape folding mechanism, and a welding mechanism are disposed from the upstream side along the transport path, the blank heating mechanism is configured to heat the glued edge of the blank;
  • the tape joining mechanism is configured to supply the tape cut to a length corresponding to the adhesive end of the blank so that the longitudinal direction of the tape coincides with the blank transport direction, and to join the tape to the adhesive end region on one side of the blank while transporting the blank in a state in which the tape protrudes from the adhesive end edge of the blank;
  • the tape folding mechanism is configured to fold back a protruding portion of the tape attached to the blank along an adhesive edge of the blank;
  • the welding mechanism is configured to apply the folded tape to an adhesive end region on the other side of the
  • the tape application mechanism pays out the tape in synchronization with the transport speed of the blank by the transport mechanism.
  • the tape folding mechanism has an insertion passage having an open side for passing the adhesive end of the blank while transporting the blank,
  • the insertion passage may have a folded wall whose angle with respect to a blank plane continuously decreases as the blank advances in the blank conveying direction.
  • the tape folding mechanism folds the tape back in such a manner that a space is formed between the end surface of the adhesive end of the blank and the tape.
  • the tape application end surface processing device of the present invention can be configured to have a tape temporary fastening mechanism between the tape application mechanism and the tape folding mechanism, which welds the tape to at least a portion of the adhesive end region on one side of the blank on the upstream side in the blank transport direction.
  • the welding mechanism includes a first welding unit that welds the tape folded back to a part of the adhesive end region on the other surface of the blank;
  • the tape may be configured to have a second welded portion that welds substantially the entire surface of the tape while a portion of the tape is temporarily fastened by the first welded portion.
  • the first welding section can be configured to include a tape correction guide that maintains the folded state of the tape folded back by the tape folding mechanism in close proximity to the other side of the blank.
  • the present invention provides a method for processing an end surface of a blank by applying a long tape to the end surface of the blank, the method comprising the steps of: a blank heating step of heating an adhesive end portion of the blank conveyed along a conveying path; a tape bonding process in which the tape cut to a length corresponding to the adhesive end of the blank is supplied so that the longitudinal direction of the tape coincides with the blank transport direction, and the tape is bonded to the adhesive end region on one side of the blank while transporting the blank in a state in which the tape protrudes from the adhesive end edge of the blank; a tape folding step of folding back a protruding portion of the tape attached to the blank along an adhesive edge of the blank; and a welding step of attaching the folded tape to the adhesive end region on the other side of the blank.
  • a blank heating mechanism which heats the adhesive end of the blank in advance
  • a tape application mechanism which applies the tape to one side of the blank so that it protrudes from the adhesive end edge
  • a tape folding mechanism which folds the protruding portion of the tape to the other side
  • a welding mechanism which applies the folded back tape to the blank.
  • the tape is applied to both the front and back sides of the adhesive end of the blank to cover the end face, preventing exposure of the base paper at the end face and ensuring the desired water resistance.
  • the blank end face processing is performed at high speed with a simple structure, it can be performed continuously, automatically and with high precision, so that the occurrence of application defects such as wrinkling and curling of the tape is suppressed, and the tape can be folded back to the back side of the blank while the blank is being transported.
  • the end face processing using tape can be performed in a short time and with a high yield, resulting in high production efficiency.
  • the tape is cut to a length corresponding to the adhesive end of the blank in the tape joining mechanism, even when the blank specifications change, tape of the length corresponding to the blank can be supplied. This eliminates the need to change the tape width size, etc. when the blank specifications change, resulting in high versatility.
  • the blank is transported in a pre-heated state while the tape is supplied in synchronization with it, so the blank and the tape are moved at the same speed and come into contact with each other, thereby allowing the tape T to be applied to the blank B.
  • This can be done with high precision even under high speed operation, without causing wrinkles in the tape.
  • a tape application end surface processing device having a folding wall whose angle with respect to the blank plane continuously decreases as the blank travels in the blank transport direction, and a tape folding mechanism with an insertion passage open on one side
  • the tape can be folded back nearly 180 degrees to the other side of the blank, allowing the tape to be folded back reliably with a simple configuration, and as a result, the tape can be attached to the adhesive end area on the other side of the blank with high precision, further improving production efficiency.
  • the formation of a space between the end surface of the blank and the tape allows for variation in the position of the end surface of the blank and the accuracy of folding the tape.
  • the excess tape is melted and can be used as a resin material to fill the gaps that inevitably form between blanks.
  • a tape application end surface processing device having a tape temporary fastening mechanism that welds tape to at least a portion of the adhesive end area on one side of the blank on the upstream side in the blank transport direction can securely temporarily fasten at least the leading end of the supplied tape in the blank transport direction to one side of the blank, and can reliably prevent the occurrence of wrinkles or misalignment of the tape when the tape is folded back in the tape folding back mechanism, thereby enabling the blank end surface processing with tape to be performed with greater precision.
  • the tape can be securely temporarily attached to the other side of the blank by the first welding section, and then the second welding section can weld almost the entire surface of the tape. This reliably prevents wrinkles and misalignment from occurring when the entire surface of the tape is welded, and therefore allows the blank end surface processing with tape to be performed with even greater precision.
  • the folded state of the tape can be reliably maintained by the tape correction guide while the tape can be welded to the adhesive end area on the other side of the blank, so that the tape can be temporarily fixed in the desired position without any misalignment, and therefore the end surface processing of the blank can be performed with tape with even greater precision. Furthermore, if there is no component, such as a tape correction guide, that maintains and corrects the folded state of the tape by using external force, etc., there is a risk that the elasticity of the tape will cause it to return to its original state or to an angle halfway thereto after being ejected from the tape folding mechanism.
  • FIG. 2 is a schematic diagram (plan view) showing an example of the configuration of a blank and a tape whose end faces are treated by the tape application end face treatment device of the present invention.
  • FIG. 2 is a schematic diagram (X-ray cross-sectional view) showing an example of the configuration of a blank and a tape whose edge is treated by the tape application edge treatment device of the present invention.
  • 1 is a perspective view showing an example of a configuration of a taping edge surface processing apparatus according to an embodiment of the present invention
  • FIG. 3 is a perspective view showing a blank heating mechanism of the tape application end face processing apparatus of FIG. 2 .
  • 3 is a cross-sectional view showing a blank heating mechanism of the tape application end face processing apparatus of FIG. 2.
  • FIG. 13 is a schematic diagram (plan view) showing a state in which a tape is bonded to a front surface side of a blank by a tape bonding mechanism.
  • FIG. 13 is a schematic diagram (Y-line cross-sectional view) showing a state in which a tape is bonded to the front surface side of a blank by a tape bonding mechanism.
  • FIG. 3 is a perspective view showing a tape joining mechanism of the taping edge surface processing apparatus of FIG. 2.
  • 3 is a side view showing a tape joining mechanism of the tape joining end surface processing apparatus of FIG. 2.
  • 3 is a partially enlarged side view showing a tape joining mechanism of the tape joining end face processing apparatus of FIG. 2.
  • 3 is a perspective view showing a temporary tape fastening mechanism of the taping edge surface processing apparatus of FIG. 2.
  • FIG. 3 is a side view showing a temporary tape fastening mechanism of the taping edge surface processing apparatus of FIG. 2.
  • 11 is a schematic plan view showing a state in which the tape is temporarily fastened to the front surface side of the blank by the tape temporary fastening mechanism.
  • FIG. 3 is a side view showing a tape folding mechanism of the tape application end surface processing device of FIG. 2.
  • 3A to 3C are cross-sectional views showing respective sections of a tape folding mechanism of the tape application end surface processing device of FIG. 2 .
  • 3 is a perspective view showing a first welding part of the taping edge surface processing device of FIG. 2.
  • 3 is a cross-sectional view showing a first welding portion of the tape application edge surface processing device of FIG. 2.
  • 3 is a perspective view showing a second welding portion of the taping edge surface processing device of FIG. 2.
  • 3 is a cross-sectional view showing a second welding portion of the tape application edge surface processing device of FIG. 2.
  • the tape application edge treatment device of the present invention is a device for continuously and automatically performing edge treatment to cover the edge of a blank, which is the material for a paper container such as a paper cup, with a long, rectangular tape.
  • the purpose of such edge treatment is to prevent the base paper from being exposed at the edge of the adhesive end of the blank, which will be located on the inner surface of the container, thereby suppressing the penetration of liquid from the blank edge, and ensuring high water resistance of the container.
  • the blank B which is the object to be processed by the tape application edge surface processing device of the present invention, is used to form the body of a paper cup, for example, and is fan-shaped in plan view, as shown in Fig. 1A.
  • a fan shape is a shape obtained by cutting a single ring by two straight lines extending radially from a center point (the center of the fan) and forming an acute angle with each other, and in the tape application edge surface processing device 100 of this embodiment, a strip of tape T is applied to a side end (adhesive end) formed by the straight lines.
  • the blank B can be obtained by punching out a predetermined shape from the paper laminate 1. There are no particular limitations on the method of punching, and it can be performed, for example, using various known punching devices.
  • the paper laminate 1 is formed by forming resin layers 3, 3, which are water-stopping layers, on both sides of the base paper 2, which is the main material. From the viewpoint of obtaining water resistance for the paper container finally manufactured by assembling the blank B, this resin layer 3 only needs to be formed on at least the side that will become the inner surface of the container.
  • the paper laminate 1 may have a laminated structure of three or more layers, and each resin layer 3 may be made of a different resin material. For example, a barrier layer, a printed layer, an adhesive layer, etc., made of a metal vapor deposition layer, may also be provided.
  • the thickness of the blank B (the thickness of the paper laminate 1) is, for example, 150 to 450 ⁇ m.
  • the thickness of the resin layer 3 is a thickness that exhibits heat sealability when the blanks B are thermally bonded together to assemble the paper container, and can be in the range of 10 to 80 ⁇ m, for example, and the thickness can be set according to the areas to be bonded.
  • the base paper 2 As the base paper 2, various known base papers can be used depending on the shape and desired strength of the paper container.
  • the base paper 2 preferably has a basis weight in the range of 150 to 330 g/m 2 .
  • resin material for forming the resin layer 3 various known resin materials having water resistance can be used.
  • materials having both water resistance and heat sealability can be preferably used, such as polyolefin resins such as polyethylene and polypropylene, polyvinyl alcohol resin, acrylic acid resin, methacrylic acid resin, vinyl chloride resin, polyvinylidene chloride resin, vinyl acetate resin, polyurethane resin, polyester resins such as polyethylene terephthalate, polyamide resins such as nylon 6 and nylon 6,6, polystyrene resin, phenolic resin, and mixtures of these.
  • polyethylene resin from the viewpoints of water resistance, heat sealability, glass transition point, etc.
  • the tape T is supplied to a tape joining mechanism 120, which will be described in detail later, as a roll of uncut, long, narrow tape wound up.
  • the width of the tape T is, for example, 5 to 20 mm, and is preferably 10 mm. If the width of the tape T is too large, the size of the tape folding mechanism will be unavoidable, and if the width of the tape T is too small, there is a risk that the tape T cannot be securely welded to the front and back surfaces of the side ends of the blank B.
  • the apparatus includes a transport mechanism 101 that transports the blank B along a transport path, a blank heating mechanism 110 that performs a blank heating step of heating the side end of the blank B, and a tape application mechanism 120 that performs a tape application step of applying a half (hereinafter referred to as the "left half") T1 of the tape T, which is approximately half in the width direction, cut in advance, to an adhesive end region A1 of the side end on the front surface (one surface) of the blank B.
  • a transport mechanism 101 that transports the blank B along a transport path
  • a blank heating mechanism 110 that performs a blank heating step of heating the side end of the blank B
  • a tape application mechanism 120 that performs a tape application step of applying a half (hereinafter referred to as the "left half") T1 of the tape T, which is approximately half in the width direction, cut in advance, to an adhesive end region A1 of the side end on the front surface (one surface) of the blank B.
  • a tape folding mechanism 140 that performs a tape folding process of folding back the remaining half (hereinafter referred to as the "right half") T2 of the tape T protruding from the side edge F on the front side of the blank B along the side edge (adhesive end edge) F of the blank B to the back side (other side); a first welding section 150 that performs a first welding process of temporarily fastening the folded tape T to the adhesive end region A2 on the other side of the blank B; and a second welding section 160 that performs a second welding process of welding the entire surface of the folded tape T.
  • the blank heating mechanism 110, tape bonding mechanism 120, tape temporary fastening mechanism 130, tape folding mechanism 140, first welding section 150 and second welding section 160 are arranged from the upstream side along a linear transport path, and each step of the tape application end face processing method is performed at each location as the blank B is transported. Moreover, the blank heating mechanism 110, tape bonding mechanism 120, tape temporary fastening mechanism 130, tape folding mechanism 140, first welding section 150 and second welding section 160 are controlled to operate in conjunction with each other during intermittent transport by the transport mechanism 101. This allows the tape application end face processing device 100 to continuously cover the end face E of the side end of the blank B with the tape T.
  • the edge processing speed of the blanks B by the tape application edge processing device 100 of the present invention is set to 120 to 180 sheets/min, and is preferably, for example, 150 sheets/min or more.
  • a transport method using a belt conveyor by vacuum suction is adopted, but as long as the method can achieve the intermittent transport required by the present invention, the specific transport method is not particularly limited, and various known configurations can be adopted. For example, a transport method in which the substrate is clamped by a clamping member may be adopted.
  • the blank heating mechanism 110 heats the front and back surfaces of the side end portion of the blank B, thereby increasing the temperature of the entire blank B and melting the resin layer 3 on the front and back surfaces of the side end portion of the blank B.
  • the blank heating mechanism 110 is specifically configured to include a heating section 111 for heating the front side of the side end of blank B, and a heating section 116 for heating the back side of the side end of blank B, both of which are provided on the transport path of the side end of blank B.
  • heating sections 111, 116 are arranged on the conveying path at the side end of the blank B so as to be in a non-contact state with the blank B, thereby enabling the blank B to be heated simply by conveying it in the conveying direction and stopping it at a predetermined position.
  • the area including the adhesive end areas A1, A2 on the front and back sides of the side end of the blank B where the tape T is attached is heated to a predetermined temperature, for example, an area 10 mm inward from the side edge F is heated.
  • a predetermined temperature for example, an area 10 mm inward from the side edge F.
  • the temperature of the hot air from the heating section 111 facing the front surface of the blank B can be, for example, 440° C.
  • the temperature of the hot air from the heating section 116 facing the back surface of the blank B can be, for example, 300° C.
  • the temperatures of the heating sections 111, 116 relating to the front and back surfaces of the blank B may be the same, but since the tape T is bonded to the front surface side of the side end portion of the blank B in the tape bonding mechanism 120 described below, it is preferable to set the temperature of the heating section 111 facing the front surface of the blank B higher. If the temperatures of the heating sections 111, 116 are excessively high, there is a risk that the resin forming the resin layer 3 will foam due to moisture in the base paper 2 of the blank B.
  • the specific heating method of the blank B in the blank heating mechanism 110 is not limited to a method using hot air, and various known configurations can be adopted as long as it can heat the front and back surfaces of the side end portion of the blank B to a predetermined temperature. For example, a heating method using a direct flame plate may be adopted.
  • the tape bonding mechanism 120 supplies tape T cut to a length corresponding to the side end of blank B so that the long direction of the tape T coincides with the blank transport direction at the bonding point P (see Figures 5B and 5C), and while transporting the blank B, bonds the left half T1 of the tape T to the adhesive end area A1 on the front side of the blank B, and brings the right half T2 of the tape T into an ear-out state in which it protrudes outward (to the right in Figures 4A and 4B) from the side edge F of blank B.
  • the tape bonding mechanism 120 includes a tape transport unit 121 that unwinds uncut tape T from a roll of tape (not shown) and transports it along a tape transport path while being tensioned by a tension roll or the like as necessary, a tape cutting unit 122 that cuts the tape T in the tape width direction perpendicular to the tape transport direction on the tape transport path, and a bonding unit 123 that is positioned downstream of the tape cutting unit 122 on the tape transport path and bonds the cut tape T to the adhesive end area A1 on the front side of the blank B.
  • the tape transport unit 121 is not limited to a specific configuration as long as it can transport the extremely thin tape T without meandering, but for example, it may be configured to transport the tape T on a conveyor by a tape transport belt 125 that can adsorb the tape T. It may also be configured to have a groove and transport the tape T in a state where it is fitted into the groove.
  • the tape transport belt 125 is stretched over a number of tension rollers, and is driven to circulate in one direction (clockwise in FIG. 5B ) by a drive roller among them.
  • the transport path of the tape T by the tape transport unit 121 has a section for transporting the tape T vertically downward.
  • the tape transport unit 121 pays out the tape T in synchronization with the transport speed of the blank B by the transport mechanism 101, and transports it to the bonding point P. Therefore, the transport speed of the tape T and the transport speed of the blank B are the same at the bonding point P of the bonding unit 123, and the transport amounts of the blank B and the tape T are the same, so that the occurrence of wrinkles and misalignment in the tape T can be suppressed while bonding is performed.
  • the tape cutting unit 122 is preferably disposed so as to cut the tape T in a section where the tape T is transported vertically downward in the transport path by the tape transport unit 121. Since tension acts in the tape longitudinal direction (vertically downward) on the tape T in a vertical state due to its own weight, the rigidity of the tape T is increased and the stability of the transport of the tape T is improved, and therefore the cutting of the tape T is also stabilized.
  • the tape T is adsorbed and held by the tape transport belt 125 by the tape transport unit 121 and transported to the lamination unit 123.
  • the position where the tape T is cut is indicated by a solid black arrow in FIG. 5B. Since the tape T is cut in the tape width direction by the tape cutting unit 122, the width of the original tape corresponds to the width of the tape T.
  • the bonding unit 123 is composed of a drive roller 126, which is also a tension roller for the tape transport belt 125 of the tape transport unit 121, and a nip roller 127 arranged opposite the drive roller 126 and rotated in synchronization with the drive roller 126 so as to proceed in the same direction at the bonding point.
  • the uncut tape T is transported in the longitudinal direction, cut in the width direction of the tape T, and the cut tape T is also transported in the longitudinal direction while being supplied along the side edge F of the blank B.
  • the thickness of the blank B is approximately 0.4 mm
  • the thickness of the tape T is approximately 0.05 mm
  • the gap between the rolls of the drive roller 126 and the nip roller 127 is approximately 0.45 mm.
  • the positional relationship between the above-mentioned components is such that a gap of a size corresponding to the thickness of the tape T is left therebetween, but the nip roller 127 may also be arranged in a state in which it presses the drive roller 126 so as to apply an appropriate nip pressure.
  • the region where the tape is applied to the blank B by the tape application mechanism 120 is a central region excluding the upstream and downstream ends of the side ends of the blank B in the blank transport direction.
  • the end regions where the tape T is not applied are regions with a blank transport direction length t1 of, for example, about 5 mm ⁇ 1 mm.
  • the length h of the tape T cut by the tape cutting unit 122 is shorter than the length of the side ends of the blank B (e.g., 110 mm) minus the length of the end regions where the tape T is not applied (e.g., 100 mm). If the positional accuracy of the lamination is low, the end face covering effect may not be adequately obtained, curling may be hindered during assembly of the blank B, and the appearance may be impaired.
  • the end regions are not exposed inside the container because they become the curled portions of the opening or the bottom portion when the blank B is assembled.
  • the specific amount by which the tape T protrudes outward from the adhesive end area A1 on the front side of the blank B varies slightly depending on the width of the tape T, but it is sufficient that the tape is securely attached to the front and back sides of the side ends of the blank B and covers the end faces E.
  • it is preferably 20-80% of the width of the tape T after deducting the length of the end faces E, and more preferably 50%.
  • the specific method of adhering the tape T to the blank B in the lamination unit 123 is not limited to the method of pressing with two rollers, and various known configurations can be adopted. For example, a method using a seal bar (heat plate) or an ultrasonic method may be adopted. Also, depending on the welding method adopted, it is possible to adopt a configuration in which welding is performed while the blank B is stationary, rather than welding while the blank B is being transported.
  • the tape temporary fastening mechanism 130 is disposed between the tape bonding mechanism 120 and the tape folding mechanism 140, and temporarily fastens the tape T to the front side of the blank B in order to prevent the tape T from peeling off from the blank B in the tape folding mechanism 140 described below, or to improve the folding accuracy of the tape T.
  • the tape T may be temporarily fastened by welding the left half T1 of the tape T to at least a part of the upstream side in the blank transport direction (blank tip side) of the adhesive end region A1 on the front side of the blank B.
  • At least the tip side in the blank transport direction of the left half T1 of the tape T may be welded to the blank tip side of the adhesive end region A1 on the front side of the blank B.
  • an area of 63 mm in the longitudinal direction from the tip (upper end in FIG. 7 ) of the left half T1 of the tape T and the full width (5 mm) of the left half T1 of the tape T in the width direction may be welded to the blank B.
  • the tape T may be temporarily fastened over the entire adhesive end region A1, that is, over the entire left half T1 of the tape T.
  • the upper seal bar 131 By lowering the upper seal bar 131 while the blank B is stopped at a predetermined position, a predetermined area where the tape T on the side edge of the blank B should be temporarily fastened is sandwiched between the upper seal bar 131 and the lower seal bar 136, thereby enabling the temporary fastening process to be performed.
  • the space between the upper seal bar 131 and the lower seal bar 136 becomes a transport path for the side edge of the blank B, allowing the blank B to pass through.
  • the temperature of the upper seal bar 131 may be, for example, 130° C.
  • the temperature of the lower seal bar 136 may be, for example, 60° C.
  • the temperatures of the upper seal bar 131 and the lower seal bar 136 are preferably set so that the temperature of the upper seal bar 131 is higher, since the tape T is temporarily fastened to the front side of the side end of the blank B. If the temperature of the lower seal bar 136 is excessively high, there is a risk that the blank B will stick to the lower seal bar 136.
  • the temperatures of the upper seal bar 131 and the lower seal bar 136 may be set higher, provided that no problems such as the tape T or blank B sticking to them occur.
  • the surfaces of the upper seal bar 131 and the lower seal bar 136 that come into contact with the blank B and the tape T are subjected to temperature control as well as to a coating surface treatment such as a fluororesin processing treatment in order to prevent the resin layers of the blank B and the tape T from sticking to these seal bars 131, 136.
  • the specific method of welding the tape T to the blank B in the tape temporary fastening mechanism 130 is not limited to a method using a seal bar (heat plate), and various known configurations can be adopted as long as the tape T can be temporarily fastened to the blank B. For example, a pressure bonding method using a fixing roller, an ultrasonic method, etc. may be adopted. Furthermore, depending on the welding method adopted, welding can be performed while the blank B is being conveyed, rather than while the conveyance of the blank B is stagnant.
  • the tape folding mechanism 140 has an insertion passage 141 extending in the blank transport direction through which the side end of the blank B passes while being transported.
  • the insertion passage 141 is open on one side (the front side in FIG. 8) along the blank transport direction, allowing the side end of the blank B to pass through during transport.
  • the insertion passage 141 has a ceiling wall 142 arranged to face the front side (upper side in FIG.
  • the folding wall 143 has a different gradient depending on the position along the blank transport direction, and the gradient of the wall surface changes continuously or stepwise as it moves in the blank transport direction.
  • the inner surface of the insertion passage 141 of the tape folding mechanism 140 in this embodiment i.e., the surface that comes into contact with the blank B or the tape T, is subjected to a coating surface treatment such as a fluororesin processing treatment from the standpoint of non-adhesion and low friction with the blank B or the tape T.
  • Figure 9 (a) shows a cross section at a position 2 mm away from the entrance A of the insertion passage 141 in the blank transport direction, where the ceiling wall 142 is not provided in close proximity to the entrance A, and the folded wall 143 is formed integrally with the rear wall 144 in a flat plate shape at an angle to the ceiling wall 142.
  • the folded wall 143 and the rear wall 144 are spaced apart enough so as not to come into contact with the tape T, and therefore the tape T cannot be folded.
  • 9(b) shows a cross section at a position 10 mm away from the entrance A of the insertion passage 141 in the blank transport direction, and at this position the ceiling wall 142 is provided at a distance of, for example, 1.05 mm from the blank plane.
  • the folding wall 143 at this position is integral with the back wall 144 and formed into a flat plate, with a horizontal distance of 0.68 mm from the end face E of the blank B and a gradient of 114° with respect to the blank plane.
  • the tape T is folded in one step according to the back wall 144 and the folding wall 143.
  • the tape T is folded along the back wall 144 and the folding wall 143.
  • 9(d) shows a cross section at a position 30 mm away from the entrance A of the insertion passage 141 in the blank transport direction, where the ceiling wall 142 is provided at the same position as in FIG.
  • the folding wall 143 at this position is formed as a flat plate integral with the back wall 144, with a horizontal distance d2 from the end face E of the blank B of 0.2 mm and an angle of 90° with respect to the blank plane.
  • the tape T is folded along the back wall 144 and the folding wall 143.
  • Figure 9(e) shows a cross section at a position 40 mm away from the entrance A of the insertion passage 141 in the blank transport direction, where the ceiling wall 142 is provided at the same position as in Figure 9(c), and the rear wall 144 at this position has a horizontal distance of 0.2 mm from the end face E of the blank B, an angle of 90° with respect to the blank plane, and a vertical length (vertical length in Figure 9) of 0.6 mm, and the folding back wall 143 is continuous with the rear wall 144 and has an angle of 68° with respect to the blank plane.
  • the tape T is folded in one step according to the rear wall 144, and then folded in another step according to the folding back wall 143.
  • Figure 9(f) shows a cross section at a position 50 mm away from the entrance A of the insertion passage 141 in the blank transport direction, where the ceiling wall 142 is provided at the same position as in Figure 9(c), the rear wall 144 is provided at the same position as in Figure 9(e), and the folding wall 143 is continuous with the rear wall 144 and has an angle of 37° with respect to the blank plane.
  • the tape T is folded further along the folding wall 143.
  • Figure 9(g) shows a cross section at a position 60 mm away from the entrance A of the insertion passage 141 in the blank transport direction, where the ceiling wall 142 is provided at the same position as in Figure 9(c), the rear wall 144 is provided at the same position as in Figure 9(e), and the folding wall 143 is continuous with the rear wall 144 and has an angle of 9.5° with respect to the blank plane.
  • the tape T is folded further along the folding wall 143.
  • Figure 9(h) shows a cross section at a position 68 mm away from the entrance A of the insertion passage 141 in the blank transport direction, where the ceiling wall 142 is provided in the same position as in Figure 9(c), and the rear wall 144 is provided in the same position as in Figure 9(e).
  • the fold-back wall 143 is continuous with the rear wall 144 and has a gradient of 0° with respect to the blank plane, so that the tape T is further folded along the fold-back wall 143, thereby obtaining a state in which the left half T1 of the tape T attached to the surface side of the blank B is folded nearly 180°.
  • the right half T2 of the tape T to be folded is bent along the rear wall 144 and the folding wall 143, so that the tape T folded along the rear wall 144, which is slightly spaced apart from the end face E of the blank B, is folded without coming into contact with the end face E of the side end of the blank B. Since the tape T is welded in this state, the resulting edge-treated blank B has a minute space formed between the edge E of the blank B and the tape T.
  • not contacting the edge E of the blank B means that a space can be formed between the edge E and the folded-back tape T, and means that the length of the tape T from the side edge on the front side of the blank B to the side edge on the back side is greater than the length in the thickness direction of the edge E (i.e. the thickness of the blank B), and includes the case where a portion of the floating tape T is in contact with the edge E.
  • the left half T1 of the tape T welded to the adhesive end area A1 on the front side of the side end of the blank B has a width of 4.7 mm, and of the remaining right half T2, the width welded to the adhesive end area A2 on the back side is 4.7 mm, and the width of the non-welded portion facing the edge face E is 0.6 mm.
  • the space formed between the end face E of the end-processed blank B obtained by the tape application end face processing device 100 of this embodiment and the tape T is a very small space as described above, but this is not essential and the device may be configured to form a larger space.
  • the tape T is folded back by a single insertion passage 141 whose internal wall structure changes continuously, but the specific configuration of the tape folding mechanism 140 is not limited to the above embodiment, and it may be configured to fold back gradually using multiple stations, or may be configured to fold back while the blank B is stopped from being transported, rather than while it is being transported.
  • the tape application end surface processing device 100 of this embodiment has a welding mechanism that attaches the folded-back tape T to the adhesive end area A2 on the back surface of the blank B, and this welding mechanism consists of a first welding section 150 that temporarily fastens the folded-back tape T to the adhesive end area A2 on the back surface of the blank B, and a second welding section 160 that welds the entire surface of the folded-back tape T to the adhesive end area A2 on the back surface of the blank B.
  • the first welding portion 150 is located near the exit of the insertion passage 141 of the tape folding mechanism 140, and is intended to temporarily fasten the tape T folded back to the back side of the blank B, maintaining the folded state of the tape T, and provide it to the second welding portion 160.
  • the tape T may be temporarily fastened to the back side of the blank B by welding a part of the right half T2 of the tape T to an inner region in the width direction (left-right direction in FIG. 10B ) perpendicular to the blank transport direction in the adhesive end region A2 on the back side of the blank B.
  • an area 2.2 mm wide from the free end (the right end before being folded back) of the tape T folded back to the back side of the blank B and from the leading end to the trailing end in the blank transport direction may be welded to the adhesive end region A2 on the back side of the blank B.
  • the first welding section 150 is provided with a tape correction guide 155 that supports areas of the tape T other than the temporary fastening area to the back side of the blank B and maintains the folded state in which the tape T folded back by the tape folding mechanism 140 is forcibly brought close to the other side of the blank B, and is further provided with a fixed upper sealing bar 151 that is provided on the transport path of the side end of the blank B and that heats the front side of the side end of the blank B, and a lower sealing bar 156 that can be moved up and down and that heats the back side of the side end of the blank B.
  • the tape correction guide 155 is made of a non-heating bar that supports the tape T in a state where it pushes the tape T upward from below, facing the upper seal bar 151, and a lower seal bar 156 is disposed adjacent to the tape correction guide 155 and facing the upper seal bar 151.
  • the tape correction guide 155 and the lower seal bar 156 are spaced apart from each other by, for example, about 0.5 mm in the horizontal direction.
  • the area indicated by fine diagonal lines within the upper seal bar 151 indicates the portion facing the left half T1 of the tape T (size: width length 4.7 mm, blank transport direction length 100 mm), and the area indicated by fine diagonal lines within the lower seal bar 156 indicates the portion facing the area to be temporarily fastened of the right half T2 of the tape T (size: width length 2.2 mm, blank transport direction length 100 mm).
  • the tape straightening guide 155 is fixedly provided, and since the exit of the insertion passage 141 of the tape folding mechanism 140 and the space between the upper seal bar 151 and the tape straightening guide 155 at the first welding portion 150 are substantially continuous, it is possible to transport the blank B to a predetermined heating point while maintaining the folded state of the tape T.
  • the tape correction guide 155 By making the tape correction guide 155 a non-heating bar, the tape T is prevented from contacting the seal bar for a long period of time, and thermal shrinkage of the tape T can be suppressed.
  • the surfaces of the tape correction guide 155 in this embodiment that come into contact with the blank B or the tape T are subjected to a coating surface treatment such as a fluororesin processing treatment in order to prevent the resin layer of the blank B or the tape T from sticking to the tape correction guide 155.
  • the lower seal bar 156 By raising the lower seal bar 156 while the blank B is stopped at a predetermined position, the side end of the blank B is sandwiched between the upper seal bar 151 and the lower seal bar 156, thereby enabling the temporary fastening process. After the temporary fastening process, the blank B has the free end of the right half T2 of the tape T welded to the back surface of the blank B, and the remainder of the right half T2 of the tape T is left floating without being welded to the blank B.
  • the lower seal bar 156 when the lower seal bar 156 is in the lowered position, the space between the upper seal bar 151 and the lower seal bar 156 and the tape correction guide 155 becomes a transport path for the side end of the blank B, allowing the blank B to pass through.
  • the temperature of the upper seal bar 151 can be, for example, 115° C.
  • the temperature of the lower seal bar 156 can be, for example, 135° C.
  • the temperatures of the upper seal bar 151 and the lower seal bar 156 are preferably set so that the temperature of the lower seal bar 156 is higher because the tape T is temporarily fastened to the back side of the side end of the blank B and because time has passed since the blank B was heated by the blank heating mechanism 110.
  • the temperature of the upper seal bar 151 does not need to be raised as much as that of the lower seal bar 156 because the heat applied by the tape temporary fastening mechanism 130 remains in the upper seal bar 151.
  • the temperatures of the upper seal bar 151 and the lower seal bar 156 are excessively high, there is a risk that the tape T will stick to the upper seal bar 151 or the lower seal bar 156.
  • the temperatures of the upper seal bar 151 and the lower seal bar 156 may be set higher as long as no problems such as the tape T sticking to them occur.
  • the surfaces of the upper seal bar 151 and the lower seal bar 156 that come into contact with the blank B and the tape T are subjected to temperature control as well as to a coating surface treatment such as a fluororesin processing treatment in order to prevent the resin layers of the blank B and the tape T from sticking to these seal bars 151, 156.
  • the specific welding method of the tape T to the blank B in the first welding section 150 is not limited to a method using a seal bar (heat plate), and various known configurations can be adopted as long as the tape T can be temporarily fastened to the blank B.
  • a pressure bonding method using a fixing roller, an ultrasonic method, etc. may be adopted.
  • welding can be performed while the blank B is being conveyed, rather than while the conveyance of the blank B is stagnant.
  • the second welding portion 160 welds substantially the entire surface of the folded tape T to the adhesive end region A2 on the back surface of the blank B. Since a portion of the right half T2 of the tape is temporarily secured to the back surface of the blank B at the first welding portion 150, the folded state of the tape T is maintained even without correction by the tape correction guide.
  • the welding of the tape T at the second welding section 160 is performed on the entire surface of the right half T2 of the tape T facing the back surface of the blank B, but this is not limited to this, and it is sufficient if the raised areas of the tape T that have not been welded to the back surface of the blank B at the first welding section 150 are newly welded, and further, some floating may remain as long as it will melt during the heat sealing process when assembling the blank B to form a paper container.
  • the second welding section 160 is configured to include a fixed upper sealing bar 161 that is provided on the conveying path of the side end of blank B and heats the front side of the side end of blank B, and a lower sealing bar 166 that can be moved up and down and heats the back side of the side end of blank B.
  • the areas indicated by fine diagonal lines within the upper seal bar 161 and the lower seal bar 166 indicate the portions that face the portions of the left half T1 and right half T2 of the tape T to be welded (size: width direction length 4.7 mm, blank conveying direction length 100 mm).
  • the blank B By raising the lower seal bar 166 while the blank B is stopped at a predetermined position, the side end of the blank B is sandwiched between the upper seal bar 161 and the lower seal bar 166, thereby enabling the full-surface welding process to be performed.
  • the blank B After the full-surface welding process, the blank B has the left half T1 of the tape T welded to the front surface of the blank B and most of the right half T2 welded to the back surface of the blank B, with the tape T affixed by welding to the front and back surfaces of the blank B, and therefore the end face E is in a covered state.
  • the end face E of the blank B may be directly welded with the tape T, or may be covered by the tape T via a gap.
  • the space between the upper seal bar 161 and the lower seal bar 166 serves as a transport path for the side end of the blank B, allowing the blank B to pass through.
  • the temperature of the upper seal bar 161 can be, for example, 40° C.
  • the temperature of the lower seal bar 166 can be, for example, 130° C.
  • the temperatures of the upper seal bar 161 and the lower seal bar 166 are preferably set so that the temperature of the lower seal bar 166 is higher, since the tape T is welded to the unwelded portion of the adhesive end region A2 on the back side of the blank B.
  • the temperature of the upper seal bar 161 does not need to be raised as much as that of the lower seal bar 166, since the heat applied in the mechanism up to the previous process remains. If the temperatures of the upper seal bar 161 and the lower seal bar 166 are excessively high, there is a risk that the tape T will stick to the upper seal bar 161 or the lower seal bar 166.
  • the temperatures of the upper seal bar 161 and the lower seal bar 166 may be set higher, provided that no problems such as the tape T sticking to them occur.
  • the surfaces of the upper seal bar 161 and the lower seal bar 166 that come into contact with the blank B and the tape T are subjected to temperature control as well as to a coating surface treatment such as a fluororesin processing treatment in order to prevent the resin layers of the blank B and the tape T from sticking to these seal bars 161, 166.
  • the specific welding method of the tape T to the blank B in the second welding section 160 is not limited to a method using a seal bar (heat plate), and various known configurations can be adopted as long as the tape T can be temporarily fastened to the blank B. For example, a pressure bonding method using a fixing roller, an ultrasonic method, etc. may be adopted. Furthermore, depending on the welding method adopted, welding can be performed while the blank B is being conveyed, rather than while the conveyance of the blank B is stagnant.
  • the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit and scope of the present invention.
  • the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit and scope of the present invention.
  • the case where the end face of the side end of the sector-shaped blank is covered is described, but the shape of the blank is not limited to this, and the end face treatment can be performed in the same manner for any part as long as the end is linear. Note that some meandering, arc-shaped bulges, notches, etc. of the end are acceptable.
  • the tape-applying edge treatment device in the above embodiment has been described as performing edge treatment to ensure high water resistance in the paper container finally obtained from the blank, but it can be used for various purposes such as covering the edge by applying strips of tape to the front and back surfaces of the (straight) ends of a sheet-like blank.

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PCT/JP2023/034174 2023-03-22 2023-09-21 テープ貼り端面処理装置およびテープ貼り端面処理方法 WO2024195156A1 (ja)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57181849A (en) * 1981-04-16 1982-11-09 Tetra Pak Int Improvement concerning packing material and packing vessel formed from said material
JPH0431034A (ja) * 1990-05-29 1992-02-03 Toppan Printing Co Ltd 液体容器の製造方法
JPH0977359A (ja) * 1995-09-19 1997-03-25 Kiyoshi Asai 紙片の折り返し装置
JPH09202066A (ja) * 1996-01-26 1997-08-05 Konohana:Kk 接着テープの貼り付けガイド装置
JPH11236030A (ja) * 1997-12-18 1999-08-31 Dainippon Printing Co Ltd 被覆材付ブランク、その製造方法およびその製造装置
JP2014024572A (ja) * 2012-07-26 2014-02-06 Toppan Printing Co Ltd 筒状容器
JP2018144317A (ja) * 2017-03-03 2018-09-20 グラドコジャパン株式会社 製本装置
JP2022107888A (ja) * 2021-01-12 2022-07-25 東罐興業株式会社 テープ供給装置およびテープ供給方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57181849A (en) * 1981-04-16 1982-11-09 Tetra Pak Int Improvement concerning packing material and packing vessel formed from said material
JPH0431034A (ja) * 1990-05-29 1992-02-03 Toppan Printing Co Ltd 液体容器の製造方法
JPH0977359A (ja) * 1995-09-19 1997-03-25 Kiyoshi Asai 紙片の折り返し装置
JPH09202066A (ja) * 1996-01-26 1997-08-05 Konohana:Kk 接着テープの貼り付けガイド装置
JPH11236030A (ja) * 1997-12-18 1999-08-31 Dainippon Printing Co Ltd 被覆材付ブランク、その製造方法およびその製造装置
JP2014024572A (ja) * 2012-07-26 2014-02-06 Toppan Printing Co Ltd 筒状容器
JP2018144317A (ja) * 2017-03-03 2018-09-20 グラドコジャパン株式会社 製本装置
JP2022107888A (ja) * 2021-01-12 2022-07-25 東罐興業株式会社 テープ供給装置およびテープ供給方法

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