JP3707097B2 - Manufacturing method for packaging and packaging materials - Google Patents

Description

[0001]
[Industrial application fields]
  The present invention relates to a method for manufacturing a packaging / packaging member.
[0002]
[Prior art]
  2. Description of the Related Art Conventionally, when transporting and storing an article, long members having various shapes such as an L-shaped cross section and a U-shaped cross section are packed and packaged along the corner of the article. Moreover, the package is inserted into the cylindrical body to protect the outer peripheral surface of the package. However, a long member such as an L-shaped section or a U-shaped section does not have a hollow portion inside, and simply cuts a part of a paper tube to obtain an L-shaped section or a U-shaped section. Generally, it is a member. Therefore, in order to counter strong impacts, it is necessary to increase the thickness of a long member having an L-shaped cross-section or a U-shaped cross-section, but the corresponding portion increases in weight and consumes a large amount of raw materials. Will do.
[0003]
  On the other hand, a paper tube manufactured by winding a sheet-shaped body mainly made of paper can be manufactured at a relatively low cost compared to mass production, although its manufacturing method is almost established. It is limited to a rectangle. Therefore, the usage as a packaging / packaging member has been limited to those that can use a circular or rectangular cross-section as it is, such as a barrel of a cylindrical container or a core such as a tape. This is because it has become common general knowledge that when a completed paper tube (a paper tube whose shape is determined by curing the adhesive) is deformed, its strength is extremely deteriorated. For example, even if a force is applied to a paper tube having a circular cross section from two locations at the top and bottom to deform it into an ellipse, the curvature changes. At this time, the paper tube is generally formed by laminating a large number of paper materials, and the adhesive of the paper material of each layer is cured at each curvature. Therefore, when the deformation is applied, all the curvatures of the laminated paper materials are changed. As a result, delamination occurs between the respective layers of the paper materials, and the strength as the laminated body is rapidly deteriorated. In addition, if a larger deformation is applied, the deformed portion may be broken or cracked.
[0004]
[Problems to be solved by the invention]
  In view of the above circumstances, the present invention uses a paper tube with an established mass production method, and can deform various cross-sectional shapes without causing deterioration in strength, thereby enabling packaging corresponding to more various forms.・ It is intended to be able to manufacture packaging materials.
[0005]
[Means for Solving the Problems]
  The invention of the present application provides a cylindrical body mainly composed of paper and having the following configuration in a method for producing a packaging / packaging member having a non-circular cross-sectional shape. .
  That is, the first invention of the present application is a cylindrical body mainly composed of paper, and in a method of manufacturing a packaging / packaging member having a non-circular cross section, the cylindrical body is In order to manufacture without rotating, a plurality of sheet-like bodies were wound along the outer periphery while feeding them in the axial direction of the mandrel As described above, a method for making a laminate, in which a sheet-like body mainly made of paper is laminated while applying an adhesive, or a sheet-like body mainly made of paper pre-applied with an adhesive is laminated. Then, a tube forming step for forming a cylindrical body is performed, and then an inner mold is inserted into the cylindrical body, and a pressing force is applied to the cylindrical body from the outside by a roller. In addition, there is a deformation step for deforming the cross-section into a non-circular irregular shape, and the above-described deformation of the deformation step is performed under the non-cured state with the adhesive for bonding the sheet-like body constituting the cylindrical body. The inner mold having at least one retracted part is used as the inner mold used in the deformation process, and the retracted part is a cross section perpendicular to the axial direction of the inner mold. In, the shape which is dented inward from two points on both sides of the receding part By applying a pressing force with the above roller to at least a portion located outside the receding portion of the cylindrical body, the cross section thereof is transformed into a non-circular irregular shape having the receding portion, and The roller has an outer peripheral shape along the shape of the receding part, that is, a shape in which the central portion of the roller protrudes along the shape of the receding part, and by pressing one whole receding part with one roller, By deforming the cylindrical body into a shape that conforms to the shape of the receding part, the shape of the desired receding part is accurately obtained, and by curing the adhesive during the deformation or after completion of the deformation, The present invention provides a method for producing a packaging / packaging member, characterized in that the cross section of the obtained cylindrical body is maintained in a non-circular irregular shape having a receding portion.
According to a second aspect of the present invention, in a method of manufacturing a packaging / wrapping member having a non-circular cross-section, the tubular body mainly composed of paper, and rotating the tubular body. In order to manufacture the sheet-like body, a plurality of sheet-like bodies are fed in the axial direction of the mandrel, and wound around the outer periphery thereof, and are laminated to form a sheet-like body mainly composed of paper. A tube forming process is performed in which a cylindrical body is formed by laminating while applying an adhesive, or by laminating a sheet-like body mainly composed of paper to which an adhesive has been applied in advance. The inner body is inserted into the cylindrical body, and a pressing process is applied from outside to the inside to deform the cross section into a non-circular deformed shape. A part of the outermost periphery of the sheet-like body constituting the cylindrical body, and the outermost sheet-like shape of the above deformation While maintaining the adhesive state with a part of the sheet-like body located inside the sheet, the adhesive for other parts is performed in a non-cured state so that each sheet-like body can be displaced, and the deformation process As the inner mold used for the inner mold, an inner mold having at least one receding portion is used, and in the cross section orthogonal to the axial direction of the inner mold, the receding portion is recessed inwardly from two points on both sides of the receding portion. Non-circular deformed shape having a receding section by applying the above pressing force to at least a portion located outside the receding portion of the cylindrical body, which has a V shape. The adhesive is cured during or after the deformation, and the cross-section of the obtained cylindrical body is maintained in a non-circular irregular shape having a receding portion. A method for manufacturing packaging and packaging materials To.
  In addition, the non-cured adhesive in the deformation process may be the one in which the deformation process is performed while the adhesive applied in the pipe making process remains uncured (non-cured), or after the winding process is completed, The adhesive once cured may be returned to a non-cured state during the deformation process. Moreover, when performing a pipe making process using the sheet-like object previously provided with a hot-melt adhesive etc., it should just be made into a non-hardened state at the time of a deformation | transformation process after completion | finish of a pipe making process. Furthermore, in the pipe making process, the adhesive only at the end of the outer peripheral layer is cured to be in a temporary adhesive state, and in the deformation process, the entire adhesive is uncured in the deformation process and is deformed. Also good.
  In the method according to the first aspect of the present invention, the deformation step is performed in a state where all the adhesive is in a non-cured state. However, the second aspect of the present invention forms the tubular body by performing the deformation step. While maintaining the adhesive state between a part of the outermost periphery of the sheet-like body and a part of the sheet-like body located inside the outermost sheet-like body, the adhesive for other parts is not cured. A method for producing a packaging / packaging member is provided.
[0006]
  According to a third invention of the present application, in the method according to the first or second invention, the length of the outer periphery of the inner mold is substantially equal to or slightly smaller than the length of the inner circumference of the cylindrical body, and the retracted portion of the inner mold is In the cross section orthogonal to the axial direction of the inner mold, it has a substantially V-shaped shape recessed inward from two points on both sides of the receding part. In addition, at least one of the two points on both sides of the receding part constitutes a part of the curved part, and the curved part has a smaller radius of curvature than the cylindrical body at the end of the pipe making process. Yes, the above pressing force is applied to at least a portion of the cylindrical body located outside the receding portion by a roller having an outer peripheral shape along a substantially V-shaped cross section that is the shape of the receding portion. By this, the thing characterized by transforming the cross section into the non-circular irregular shape provided with the receding part and the curved part is provided.
[0007]
  According to a fourth invention of the present application, in the method according to the first, second, or third invention, in the tube forming step, the sheet-like body is laminated on the mandrel, and the cylindrical body is transferred in the axial direction of the mandrel. By this, the thing characterized by inserting the inner mold | die of a deformation | transformation process in the non-hardened cylindrical body, and applying the said pressing force is provided.
[0008]
[Action]
  In the present invention, the inner mold is inserted into the cylindrical body, and a pressing force is applied from the outside toward the inside to deform the cross section into a non-circular irregular shape. In particular, by applying the above-mentioned pressing force to at least a portion of the cylindrical body located outside the retracted portion, the cross section of the cylindrical body is deformed into a non-circular irregular shape having a retracted portion. At the time of this deformation, since the adhesive is in a non-cured state, even if the curvature changes, a deviation occurs in each sheet-like body in accordance with the change. The delamination can prevent delamination, and the misalignment can form a receding portion without causing the sheet-like body to break or crack. Then, by curing the adhesive in this deformed state, it is possible to obtain a packaging / packaging member in which the deformed shape having the retracted portion is reliably maintained. Therefore, the packaged article / packaged article can be reliably protected by, for example, applying the retracted part of the packing / packaging member to the corner part of the packaged article / packaged article. In addition, since the entire packaging / packaging member has a cylindrical shape, the entire cylindrical shape can absorb impacts and the like from the outside, and more reliable protection can be achieved.
  In addition, the second invention of the present application may be configured such that the deformation in the deformation step is performed on a part of the outermost periphery of the sheet-like body constituting the cylindrical body and the sheet-like body located inside the outermost sheet-like body. Since the adhesive for the other part is performed in an uncured state while maintaining the adhesive state with a part, similar to the first invention, good deformation can be made. In particular, by bonding the end portion of the outermost circumference of the sheet-like body constituting the cylindrical body and the part of the sheet-like body located inside the outermost end portion until the deformation, In this stage, the laminated sheet-like body does not squeeze, and the other parts are in a non-hardened state at the time of deformation, so that the deformation is not hindered.
[0009]
  Furthermore, in the third invention of the present application, at least one of the two points on both sides of the retreating portion of the inner mold constitutes a part of the bending portion, and this bending portion is at the end of the pipe making process. Since it has a smaller radius of curvature than the cylindrical body, the cylindrical body is naturally and beautifully shaped into a shape along the curved portion by simply applying a pressing force to the portion located outside the receding portion of the cylindrical body. To curve. Thereby, the packaging and packaging member which has a retreat part and a curved part can be manufactured without difficulty. Therefore, when protecting the packaged item / packaged article by applying the receding part of the packing / packaging member to the corner part of the packaged item / packaged item, the impact from the outside is cylindrical. Although it can be absorbed by the whole body, it will be absorbed more effectively, especially by the curved part.
[0010]
  Furthermore, in the fourth invention of the present application, since the pipe making process and the deformation process are continuously performed, the adhesive can be quickly sent from the pipe making process to the deformation process without being cured. The occurrence of the deviation can be obtained more reliably.
[0011]
【Example】
  Embodiments of the present invention will be described below with reference to the drawings.
  FIG. 1 is an explanatory view of a manufacturing process according to an embodiment, and FIG. 2 is an explanatory view of a pressing process. Hereinafter, the manufacturing method will be sequentially described along the process of FIG.
[0012]
Pipe making process 1
  First, a sheet-like body made mainly of paper is laminated while applying an adhesive to form a tubular body. As the material of the sheet-like body, paper is the most common, but a sheet-like body used for a conventional so-called paper tube such as a laminate of a synthetic resin film or a metal foil on paper can be used.
[0013]
  The method of forming the cylindrical body isThis is a method of manufacturing without rotating the cylindrical body, and is performed by a method of laminating a plurality of sheet-like bodies in the axial direction of the mandrel while being wound along the outer periphery thereof.Further, the shape of the paper tube can be classified into a round paper tube having a circular cross section and a square paper tube having a rectangular cross section, either of which may be adopted.
[0014]
  In forming the paper tube, an adhesive is applied to the sheet-like bodies to bond the wound sheet-like bodies together. Although there are no particular limitations on the raw material of the adhesive, a slow-curing adhesive is used so that the adhesive is not completely cured even after winding.
[0015]
Deformation process 2
  Next, with respect to the above-mentioned uncured cylindrical body, an inner mold is inserted inside the cylindrical body, and a pressing force is applied from the outside to the inside, so that the cross section becomes a non-circular irregular shape. Deform.
[0016]
  More specifically, first, the cylindrical body is fed in the axial direction, and the inner mold is inserted into the cylindrical body. The tube forming step 1 and the deformation step 2 may be one in which one cylindrical body is continuously sent from the tube forming step 1 to the deformation step 2 to perform both steps continuously. The pipe process 1 and the deformation process 2 may be performed separately. In this case, it may be a batch type in which a large number of cylindrical bodies are wound and manufactured in the tube forming process 1 and temporarily stored, and then the manufactured cylindrical bodies are sequentially deformed in the deformation process 2.
[0017]
  In the deforming step 2, the cylindrical body needs to be sent in the axial direction without rotating. If a method that can be manufactured without rotating the cylindrical body is adopted in the above pipe forming step, Advantageously, step 1 and deformation step 2 can be coordinated on a continuous series of production lines. On the other hand, when the method of manufacturing while rotating the cylindrical body is adopted, the pipe making process 1 line and the deformation process 2 line are separated, and in the deformation process 2 line, the cylindrical body is not rotated. Will be sent in the direction.
[0018]
  In order to apply a pressing force from the outside to the inside of the cylindrical body, an appropriate pressurizing means can be adopted. For example, a roller as shown in FIG. 2 can be used. The rollers 21 and 22 are for gradually deforming the cylindrical body manufactured by the pipe making process 1 from the outer periphery to the inner part, and are appropriately arranged at the outer peripheral portion where the cylindrical body t needs to be deformed. On the other hand, the inner mold 30 is inserted into the paper tube as described above, and the rollers 21 and 22 deform the cylindrical body t so as to follow the inner mold 30.
[0019]
  The inner die 30 used in the deformation step 2 has a final inner peripheral shape of the cylindrical body t, that is, an outer peripheral shape that matches the inner peripheral shape of the packing / packaging member, and at least one retreating portion 31. Have In the case of FIG. 2, the inner mold 30 has two retracted portions 31, 31. The receding portion 31 recedes in the inner direction (inward radial direction) from the two points 32, 32 on both sides of the receding portion 31, and has a concave groove shape extending in the axial direction of the inner mold 30. That is, in the cross section orthogonal to the axial direction of the inner mold 30, the receding portion 31 is recessed in the radially inward direction from an imaginary line connecting the two points 32, 32 on both sides. The two points 32 and 32 on both sides of the retreating portion constitute a part of the curved portions 34 and 34 whose outer peripheral surfaces are curved. That is, in this embodiment, the two points 32 and 32 on both sides of the retreating portion constitute the starting point of the bending portions 34 and 34, and constitute part of the bending portions 34 and 34 whose outer peripheral surfaces are curved. It has become. More specifically, the outer peripheral surface of the receding portion 31 is composed of two straight portions 35 and 35 having a substantially V-shaped cross section, but the curved portion passes through two points 32 and 32 on both sides of the receding portion. 34, 34, and constitutes the starting point of the bending portions 34, 34. Note that the cross-sectional shape of the retreating portion 31 can be changed as appropriate, and the outer peripheral surface of the retreating portion 31 may be configured by a curved curve in place of the straight portions 35 and 35. In addition, the curved parts 32 and 32 have a curvature radius smaller than the cylindrical body at the time of completion | finish of a pipe making process.
[0020]
  The roller 21 applies the above-described pressing force to a portion located outside the receding portion 31 of the cylindrical body t. Thereby, the cross section of the cylindrical body t is deform | transformed into the non-circular irregular shape provided with the receding part t1. At this time, the cylindrical body t naturally follows the curved portion 34 without applying direct pressure by the roller 21 to the portions t2 located outside the curved portions 34, 34 on both sides of the retreating portion 31. In a cross section perpendicular to the axial direction of the cylindrical body t, the non-circular irregular shape having curved portions t2 on both sides of the retracted portion t1 is obtained. Thus, in order to deform the curved portion t2 of the cylindrical body t without being pressed by the rollers, it is desirable to simultaneously apply pressure to the retreating portions 31 by the rollers 21 and the like. In other words, in this embodiment, the rollers 21 and 21 with respect to the retreating portions 31 and 31 are arranged at two places in the cross section orthogonal to the axial direction of the cylindrical body t. The rollers 21 and 21 with respect to the portions 31 and 31 are arranged at the same position in the axial direction of the cylindrical body t. In this way, by simultaneously applying the pressurization at two places, the entire tubular body t is deformed at the same time, and the curved portion t2 can be well aligned with the curved portion 34 of the inner mold 30.
[0021]
  Further, in this embodiment, the straight portion 33 between the curved portions 34, 34 of the two left and right retracted portions 31, 31 (in other words, between the curved portion 34 and the curved portion 34 and without the retracted portion 31). The portion 33) is also pressed by the roller 22 to produce a more accurate straight line, but the pressure by the roller 22 is not necessarily required. That is, by pressing a portion corresponding to the retreating portion 31, the other portion of the cylindrical body t is displaced along the inner layer 30 in the adhesive application layer for each layer and naturally follows. It is to be noted that the rollers 22 for the linear portion are also arranged at the same position in the axial direction of the rollers 21 and 21 and the cylindrical body with respect to the retreating portions 31 and 31, so that all the rollers are pressurized simultaneously. It is desirable to do.
[0022]
  FIG. 3 shows an inner mold 30 according to another embodiment. Three retreating portions 31 are provided, and two points 32 and 32 on both sides of each retreating portion 31 are part of the bending portions 34 and 34. It is composed. The curved portions 34 on both sides of one retracted portion 31 are continuous with the curved portions 34 on both sides of the other retracted portion 31. Therefore, in this embodiment, as in the previous embodiment, the straight portion 33 (in other words, between the bending portion 34 and the bending portion 34) between the bending portions 34, 34 of the two left and right retreating portions 31, 31. In this case, there is no portion 33) where there is no retreating portion 31, and there is no roller 22 that presses the portion.
[0023]
  FIG. 4 shows an inner mold 30 of still another embodiment. Two retreating portions 31 are provided, and two points 32 and 32 on both sides of one retreating portion 31 correspond to the bending portions 34 and 34. Although it constitutes a part, the two points 32 and 32a on both sides of the other retreating part 31 have only one point 32 constituting a part of the bending part 34, and the other point 32a is a square that is not a curve. It is a bent part. Further, similarly to the first embodiment, the straight portion 33 is provided, and a necessary portion is pressed by the roller 21 for the receding portion and the roller 22 for the straight portion.
[0024]
  In addition to the above-described embodiments, the shape of the retreating portion 31 can be changed as appropriate, for example, the retreating portion 31 retreating into a curved arc shape, or having a slight undulation in the retreating portion. It is. Further, the roller 21 for the retreating part in each embodiment has an outer peripheral shape along the shape of the retreating part 31 (that is, not a simple cylindrical roller, but a shape in which the central portion 21 a protrudes along the shape of the retreating part 31. ) And pressing the entire one retreating part 31 with one roller 21 to deform the cylindrical body t into a shape along the shape of the retreating part 31 to obtain a desired shape of the retreating part t1. Although it is obtained accurately, one receding portion 31 may be formed by pressing with two or more rollers. In this case, a cylindrical roller or the like may be used.
[0025]
  As described above, the tubular body t formed in a circular shape, a rectangular shape, or the like in the pipe making step 1 is deformed into a shape along the shape of the inner mold. At that time, since the adhesive is in an uncured state, the applied adhesive acts as a lubricant in the laminated sheet-like body and can be well shifted. Therefore, the sheet-like body is displaced with respect to the force applied during deformation, thereby preventing the sheet-like body from being broken or cracked. In addition, the length of the outer periphery of the inner mold inserted into the cylindrical body is approximately equal to or slightly smaller than the length of the inner periphery of the cylindrical body, thereby forcing the wound sheet-like body to be unreasonably stretched. As a matter of course, the sheet-like body can be prevented from being broken or cracked due to deformation, and the two curved portions 34 on both sides of the retreating portion 31 can be satisfactorily applied without applying pressure directly. The cylindrical body t can be along. From this point of view, it is most preferable that the length of the outer periphery of the inner mold 30 is equal to the length of the inner periphery of the cylindrical body t. In the industrial production, a minute space for sliding is provided between the outer peripheral surface of the inner mold 30 and the inner peripheral surface of the cylindrical body t because the body t cannot slide. Thus, it is set slightly smaller. The minute interval may be about 0.2 to 0.5 mm, and even if estimated, it is sufficient if it is 1 mm or less.
[0026]
  The above-mentioned non-cured adhesive may be subjected to a deformation process while the adhesive applied in the pipe making process is uncured (non-cured), or once cured after the pipe making process is completed. An adhesive such as hot melt may be returned to a non-cured state by heating during the deformation step. Furthermore, only the end portion of the wound outermost layer is bonded to form a cylindrical body. After the winding, the cylindrical body is deformed in a deformation process, and then the non-bonded portion is bonded by heating and pressing. May be. Moreover, in order to make the above-mentioned sheet-like body shift more smoothly, different (non-continuous) sheets are different for each winding circumference than the sheet-like bodies constituting the tubular body are continuous. It is desirable to use a body. When the sheet-like body is continuous over a plurality of circumferences, a shift at one place extends over the entire continuous sheet-like body. When a cylindrical body is formed by stacking a large number of sheets, the deviation occurs separately for each sheet-like body around each circumference, which is advantageous in that the deviation of the sheet-like body can occur more smoothly.
[0027]
  If the deformation rate is large, it is impossible to cause many deformations at once. Therefore, a plurality of sets of rollers 21 are arranged in the axial direction of the cylindrical body, and gradually The cylindrical body is deformed to a desired shape. Therefore, in the deformation by the initial roller, the shape of the inner mold does not necessarily have to be the final shape. In some cases, the inner mold may be deformed without using the inner mold. Therefore, the length of the outer periphery of the inner mold at the initial time may not be substantially equal to the length of the inner periphery of the cylindrical body.
[0028]
  In addition to the deformation by the roller as described above, it can be changed to other deformation methods or used together. For example, instead of or in combination with a roller, a plurality of plate-like pressing plates are connected in an endless manner, so to speak, a caterpillar state is rotated. And the same deformation | transformation as a roller can be performed by pressing the plate-shaped press plate in this rotational movement toward the inner side from the outer side of a cylindrical body. Further, by rotating the roller or the caterpillar with the drive shaft, the feeding function of the cylindrical body may be exhibited simultaneously with the deformation.
[0029]
  In addition, when performing the pipe making process 1 and the deformation | transformation process 2 continuously, in the pipe making process 1, although a sheet-like body is wound around a mandrel, this wound cylindrical body is made into the axial direction of a mandrel. It is only necessary that the pressing force is applied by inserting the inner mold of the deformation step into the uncured cylindrical body. At that time, the mandrel for winding the sheet-like body in the pipe making process and the inner mold in the deformation process are arranged so that their axial directions are aligned and aligned, and if necessary, both It is desirable to integrate the connection. Thereby, without removing the cylindrical body from the mandrel, the cylindrical body can be transferred in the axial direction with the mandrel inserted inside, sent to the inner mold, can be deformed, and the continuous operation can be performed smoothly. Can do. More preferably, the mandrel that winds the sheet-like body and the inner mold in the deformation process are connected and integrated through the shaft body by connecting them with a shaft body with a gap therebetween. At that time, the shaft body is made thinner than the inner diameter of the cylindrical body, and when sliding between the mandrel and the inner mold, the cylindrical body is brought into contact with the shaft body between the mandrel and the inner mold. Without moving in the axial direction. Thereby, during the transfer of the shaft body portion, the cylindrical body does not generate frictional resistance, and accordingly, the transfer can be performed with a small conveying force or faster.
[0030]
Adhesive curing process 3
  Next, the adhesive is cured by forced drying or natural drying during or after the above deformation. That is, the adhesive is cured and the shape is maintained when the sheet-like body is not displaced due to deformation. In addition, since the adhesive is gradually cured, forced drying may be started during the deformation process 2 described above. The adhesive may be appropriately selected and used according to each processing means up to this curing step.
[0031]
Cutting process 4
  The finally deformed cylindrical body is appropriately cut into dimensions. This cutting can be performed using a conventional paper tube cutting device. The cutting may be performed at the time of the above-described tube-forming step 1, but it is desirable to perform the next deformation step 2 before the adhesive is cured. The cutting step 4 is placed in
[0032]
  Although the manufacture of the packaging / packaging member of the present application is completed as described above, the cross-sectional shape thereof can be changed as appropriate in addition to those of the embodiment, for example, other than the Y shape shown in FIG. Various shapes can be mass-produced by changing the shape of the pressing means such as the inner mold and the outer roller, such as V-shaped and X-shaped, and packing / packaging members according to the shape of the member to be packed can be economical It is possible to provide rich products.
[0033]
【The invention's effect】
  As mentioned above, this invention can manufacture the packaging and packaging member which can respond to a more various form by transforming this into various unique cross-sectional shapes using the paper tube by which the mass-production method was established. Therefore, it has a great effect on expanding the field of use of paper tubes.
[0034]
  In the first invention of the present application, when the paper tube is deformed, it is possible to prevent the sheet-like body from being broken or cracked due to the deformation, and is used for packing and packaging made of high strength paper tube. The member can be manufactured. In particular, in the deformation process, each sheet-like body can be displaced, and the occurrence of this displacement prevents delamination, and this displacement causes the sheet-like body to break or crack. It is possible to form the receding portion without causing the above. Then, by curing the adhesive in this deformed state, it is possible to obtain a packaging / packaging member in which the deformed shape having the retracted portion is reliably maintained. Therefore, the packaged article / packaged article can be reliably protected by, for example, applying the retracted part of the packing / packaging member to the corner part of the packaged article / packaged article. In addition, since the entire packaging / packaging member has a cylindrical shape, the entire cylindrical shape can absorb impacts and the like from the outside, and more reliable protection can be achieved.
[0035]
  In addition, the second invention of the present application may be configured such that the deformation in the deformation step is performed on a part of the outermost periphery of the sheet-like body constituting the cylindrical body and the sheet-like body located inside the outermost sheet-like body. Since the adhesive for other parts is performed in an uncured state while maintaining the adhesive state with a part, the same effect as that of the first invention can be expected, and lamination is performed until the stage of deformation. There is an advantage that the sheet-like body does not bend and the deformation is not hindered because most of the other sheet is in an uncured state.
[0036]
  Furthermore, in the third invention of the present application, in addition to the effects of the first or second invention, a packaging / packaging member having a receding portion and a curved portion can be manufactured without difficulty. Therefore, when protecting the packaged item / packaged article by applying the receding part of the packing / packaging member to the corner part of the packaged item / packaged item, the impact from the outside is cylindrical. Although it can be absorbed by the whole body, in particular, the curved portion exhibits a good elastic buffering action like a spring due to its curved shape, and can absorb shocks and the like more effectively.
[0037]
  Furthermore, in the fourth invention of the present application, in addition to the effects of the first, second and third inventions, the pipe forming process and the deformation process are continuously performed, so the adhesive remains uncured, It can be sent quickly from the pipe making process to the deformation process, and the occurrence of the deviation can be obtained more reliably.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a manufacturing process according to one embodiment.
FIG. 2 is an explanatory diagram of a deformation process.
FIG. 3 is an explanatory diagram of another deformation process.
FIG. 4 is an explanatory diagram of still another deformation process.
[Explanation of symbols]
    1 Pipe making process
    2 Deformation process
    3 Adhesive curing process
    4 Cutting process
    30 Inner mold
    21 Laura
    t Tubular body

Claims (4)

In a method of manufacturing a packaging / wrapping member having a non-circular cross-sectional shape that is a cylindrical body mainly composed of paper,
In order to manufacture without rotating the cylindrical body, while feeding a plurality of sheet-like bodies in the axial direction of the mandrel, it is a method of laminating, as it is wound along the outer periphery,
A sheet-shaped body mainly made of paper is laminated while applying an adhesive, or a sheet-like body mainly made of paper pre-applied with an adhesive is laminated to form a cylindrical body. Perform the pipe process,
Next, with respect to this cylindrical body, a deforming step of inserting an inner mold into the cylindrical body and applying a pressing force from the outside to the inside with a roller to deform the cross section into a non-circular irregular shape. ,
The above deformation of the deformation step is performed in a non-cured state with the above-mentioned adhesive for bonding the sheet-like body constituting the cylindrical body , so that each sheet-like body can be displaced,
As the inner mold used in the deformation process, an inner mold having at least one receding part is used, and the receding part is recessed inward from two points on both sides of the receding part in a cross section orthogonal to the axial direction of the inner mold. A non-circular deformed shape with a cross-section of the cylindrical body by applying a pressing force with the above roller to at least a portion located outside the retreat portion of the cylindrical body. Transformed into
The roller has an outer peripheral shape along the shape of the retreating portion, that is, a shape in which the central portion of the roller protrudes along the shape of the retreating portion, and one roller presses the entire retreating portion. By deforming the cylindrical body into a shape along the shape of the receding part, the shape of the desired receding part is obtained accurately,
Packing / characteristics for maintaining the cross-section of the obtained cylindrical body in a non-circular deformed shape with a receding part by curing the adhesive during or after the deformation A method for producing a packaging member. In a method of manufacturing a packaging / wrapping member having a non-circular cross-sectional shape that is a cylindrical body mainly composed of paper,
In order to manufacture without rotating the cylindrical body, while feeding a plurality of sheet-like bodies in the axial direction of the mandrel, it is a method of laminating, as it is wound along the outer periphery,
A sheet-shaped body mainly made of paper is laminated while applying an adhesive, or a sheet-like body mainly made of paper pre-applied with an adhesive is laminated to form a cylindrical body. Perform the pipe process,
Next, a deformation process is performed for the cylindrical body, in which an inner mold is inserted into the cylindrical body and a pressing force is applied from the outside to the inside to deform the cross section into a non-circular irregular shape. ,
The above deformation of the deformation step is performed by maintaining the adhesion state between a part of the outermost periphery of the sheet-like body constituting the cylindrical body and a part of the sheet-like body positioned inside the outermost sheet-like body. While performing the adhesive for other parts under non-cured state , so that each sheet-like body can be displaced,
As the inner mold used in the deformation process, an inner mold having at least one receding part is used, and the receding part is recessed inward from two points on both sides of the receding part in a cross section orthogonal to the axial direction of the inner mold. It has a substantially V-shaped shape, and by applying the above pressing force to at least a portion located outside the retracted portion of the cylindrical body, the cross section thereof is a non-circular shape having the retracted portion. Deformed into an irregular shape,
Packing / characteristics for maintaining the cross-section of the obtained cylindrical body in a non-circular deformed shape with a receding part by curing the adhesive during or after the deformation A method for producing a packaging member. The length of the outer periphery of the inner mold is substantially equal to or slightly smaller than the length of the cylindrical inner periphery,
In the cross section orthogonal to the axial direction of the inner mold, the inner mold receding portion has a substantially V-shape that is recessed inward from two points on both sides of the receding portion, and on both sides of the receding portion. At least one of the two points constitutes a part of the curved portion,
This curved portion has a smaller radius of curvature than the tubular body at the end of the pipe making process,
By applying the above pressing force to at least a portion of the cylindrical body located outside the receding portion with a roller having an outer peripheral shape along a substantially V-shaped cross section that is the shape of the receding portion. 3. The method for manufacturing a packaging / packaging member according to claim 1, wherein the cross section is deformed into a non-circular irregular shape having a receding portion and a curved portion. The pipe making process and the deformation process are performed continuously,
In the pipe making process, the sheet-like body is laminated on the mandrel, and the cylindrical body is transferred in the axial direction of the mandrel. The method for manufacturing a packaging / packaging member according to claim 1, 2, or 3, wherein the method is added.

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