JP7362554B2 - Roll body support and packaging using roll body support - Google Patents

Description

The present disclosure relates to a roll body support and a package in which a roll body is suspended using the roll body support.

Generally, films and the like are wound around a cylindrical core material to form a roll for transportation, storage, and the like. The roll body is attached to a support, packed, and transported. Therefore, it is preferable that the support is lightweight from the viewpoint of transportation efficiency.

International Registration No. 2008/123124 discloses a plate-like member disposed on both sides of a roll-shaped scroll, a pipe-shaped protrusion for receiving both ends of the core of the scroll, and supporting the scroll in a suspended state. A roll receiver having the following is disclosed. The plate-like member and the protrusion are integrally formed of polyolefin foamed by a bead method. The roll receiver is lightweight and easy to work with, and is hard to break because it is integrally molded from polyolefin foam using a bead method.

International Registration No. 2008/123124

However, the roll receiver cannot be said to be sufficiently lightweight. However, if an attempt is made to further reduce the weight, a problem may arise in that the strength decreases. Furthermore, since the roll holder is made of synthetic resin, there is room for further consideration of its material, etc., considering the environmental impact upon disposal.

Therefore, an object of the present disclosure is to provide a roll body support and a package using the roll body support that is lightweight, can ensure necessary strength, and has a small impact on the environment when disposed of. did.

In order to solve the above problems, the present disclosure is configured as follows. That is, the roll body support according to the present disclosure may include a plate-shaped base and a protrusion formed to protrude from one main surface of the base. The base body and the protrusion may be integrally formed pulp molded bodies. The protruding part includes a substantially cylindrical lower part that extends continuously from the base in the protruding direction, a reduced diameter part that continuously extends inward in the radial direction from the lower part, and a reduced diameter part that extends continuously from the inner peripheral end of the reduced diameter part in the protruding direction. It may have a generally cylindrical upper section extending from the bottom to the top. The thickness t of the protrusion may be substantially uniform.

Preferably, the wall thickness t may be between 3 and 8 mm.

Preferably, the base body may have a first rib formed on one main surface.

Preferably, the base may have a groove formed on the other main surface so as to extend along the first rib. A second rib may be formed in the groove portion to connect one groove side surface and the other groove side surface.

Preferably, the substrate may have a third rib extending towards a corner of the substrate.

A package according to the present disclosure includes one roll body support according to the present disclosure, another roll body support according to the present disclosure, a substantially cylindrical core material with openings formed at both ends, and a core. A roll body having a film wound around a material may be provided. The roll body may be supported by inserting the protrusion of one roll body support and the protrusion of the other roll body support into each of the openings of the core material. The roll body may be suspended between one roll body support and another roll body support.

Preferably, it may include a roll body support, a roll body having a substantially cylindrical core material with openings formed at both ends, and a film wound around the core material. The roll body may be supported by inserting the protrusion of the roll body support into the opening of the core material. The first rib of the base of the roll body support may have a low step portion whose height from one main surface is lower than other parts of the first rib. The low step portion may be disposed opposite to the peripheral edge of the end surface of the roll body.

According to the present disclosure, it is possible to obtain a roll body support and a package using the roll body support that are lightweight, can ensure necessary strength, and have a small impact on the environment when discarded.

FIG. 1 is an external perspective view showing a package according to this embodiment. FIG. 2 is an external perspective view showing the roll body support according to this embodiment. FIG. 3 is a bottom perspective view of the roll body support shown in FIG. 2. FIG. 4 is a sectional view taken along the line A-A' of the roll body support shown in FIG. 5 is an enlarged side view of the protrusion shown in FIG. 2. FIG. FIG. 6 is an enlarged sectional view showing the package shown in FIG. 1.

Hereinafter, a package 10 and a roll support 1 according to an embodiment of the present disclosure will be specifically described using FIGS. 1 to 6. In addition, the same reference numerals are attached to the same or corresponding parts in the drawings, and the description thereof will not be repeated. The dimensional ratios between the constituent members shown in each figure do not necessarily represent the actual dimensional ratios.

As shown in FIG. 1, the package 10 includes a pair of roll body supports 1, 1 and two roll bodies 100, 100. Each of the pair of roll body supports 1, 1 has a base body 2 and two protrusions 3, 3 that protrude from the main surface of the base body 2. Each of the roll bodies 100, 100 has a substantially cylindrical core material 101 and a film 102 wound around the outer peripheral surface of the core material 101. As shown in the figure, the substantially cylindrical core member 101 has openings at both ends. Each of the protrusions 3, 3 of the pair of roll body supports 1, 1 is inserted into openings on both sides of the core material 101. Thereby, the two roll bodies 100, 100 can be suspended using the pair of roll body supports 1, 1, and the package 10 can be formed. Note that the film 102 is not particularly limited as long as it is a film that can be transported.

Although not particularly shown, the package 10 is housed in a cardboard box for transportation or the like. The package 10 is housed in a cardboard box so that the outer surface of the base 2 slides against the inner surface of the cardboard box. At this time, since the roll body 100 is suspended by the pair of roll body supports 1, 1, it becomes difficult to contact the inner surface of the cardboard box. This makes it possible to prevent the roll body 100 from being damaged during transportation or the like.

Next, the roll body support 1 that suspends the roll body 100 will be described in more detail.

As shown in FIG. 2, the roll body support 1 has a base body 2 and two protrusions 3, 3 that protrude from the main surface of the base body 2 and support the roll body 100. The roll body support 1 is a pulp molded body. Therefore, the roll body support 1 is integrally formed using a paper material, as will be described later. Thereby, the roll body support 1 can obtain strength as a whole and can also achieve weight reduction. Furthermore, since the roll body support 1 is made of paper, it is easy to dispose of and recycle, and the environmental load at the time of disposal is small, thus contributing to environmental problems. In this specification, one main surface from which the protrusions 3, 3 project from the base body 2 may be referred to as a front surface, and the other main surface on the opposite side may be referred to as a back surface.

The base body 2 is a rectangular plate in plan view. The base body 2 is formed relatively thin by pulp molding. As a result, when the two roll bodies 100, 100 are suspended by the pair of roll body supports 1, 1, the width from the back surface of one roll body support 1 to the back surface of the other roll body support 1 can be reduced. can do. As a result, it can be accommodated in a smaller cardboard box or the like, improving transportation efficiency.

The base body 2 has a plurality of ribs 21. As shown in FIG. 2, each of the plurality of ribs 21 protrudes from the main surface of the base body 2 in the same direction as the protruding portion 3. The plurality of ribs 21 include ribs 21 formed radially around the protrusion 3 . The plurality of ribs 21 include a rib 21 connecting the two protruding parts 3, 3, and a rib 21 extending toward the end of the base body 2, which is perpendicular to the rib 21 connecting the two protruding parts 3, 3 in plan view. Contains. That is, the plurality of ribs 21 include a cross-shaped rib 21 that is perpendicular to the two protrusions 3, 3 in plan view. By forming a plurality of 21 in this manner, the strength of the base body 2 when the protruding portion 3 supports the roll body 100 can be improved.

As shown in FIGS. 2 and 4, the plurality of ribs 21 include a low step portion 211. As shown in FIGS. The height of the low step portion 211 protruding from the main surface of the base body 2 is lower than that of other portions of the rib 21 . The low step portions 211 are arranged at both ends of the base body 2 in the long side direction. This makes it difficult for the peripheral end portion of the end surface of the roll body 100 supported by the protruding portion 3 to come into contact with the low step portion 211 (see FIG. 1). That is, since the rectangular base 2 is prone to bending in the long side direction, by making the height of both ends in the long side direction lower than the other parts of the rib 21, bending can be prevented by contacting the base 2. Damage, bending, etc. of the roll body 100 obtained can be suppressed. Note that it is sufficient that the low step portion 211 can be disposed at a position facing the peripheral edge of the end surface of the roll body 100 when the roll body 100 is suspended by the roll body support 1. That is, the position at which the low step portion 211 is arranged can be changed in various ways depending on the radial width of the roll body 100 suspended by the roll body support 1 and the like.

As shown in FIG. 3, grooves 22 extending along the plurality of ribs 21 are formed on the back surfaces of the plurality of ribs 21, respectively. That is, the plurality of ribs 21 are formed in the shape of a groove that opens toward the back side. A rib 23 is formed in each of the plurality of groove portions 22 . Each rib 23 is formed inside the groove 22. One rib 23 is arranged in each groove 22 and is formed to connect one groove side surface and the other groove side surface so as to fill a part of the inside of each groove section 22. Further, each of the ribs 23 is formed perpendicular to the longitudinal direction of the groove 22 extending along the rib 21. Thereby, the plurality of ribs 21 can be strengthened, and the strength of the base body 2 can be further improved. In addition, as shown in FIG. 4, the rib 23 is solid, but may be formed hollow. Further, each groove portion 22 may be provided with a plurality of ribs 23.

Further, the base body 2 has four ribs 24 extending toward the corners of the surface of the base body 2, as shown in FIG. In this embodiment, the four corners of the base 2 are chamfered to prevent bending when the base 2 is dropped. The ribs 24 extend in a direction perpendicular to the four corners of the chamfered base 2 in a plan view. Thereby, the strength of the corners of the base body 2 can be improved, and bending of the corners of the base body 2 can be suppressed more reliably. Further, the ribs 24 are inclined so as to gradually become lower toward the outside of the base body 2. This makes it difficult for the peripheral edge of the end surface of the roll body 100 supported by the protrusion 3 to come into contact with the rib 24 (see FIG. 1). That is, damage, bending, etc. of the roll body 100 that may occur due to contact with the base body 2 can be suppressed. Note that the ribs 24 may be formed at any one of the four corners of the base body 2, or if the shape of the base body 2 in plan view is a polygonal shape other than a rectangular shape, the ribs 24 may be formed at each corner. good.

As shown in FIG. 3, a handle 25 may be provided at the end of the base body 2. The handle 25 is formed on the back surface of the base body 2 by providing a step at the end of the base body 2 . By hooking the fingers of the hand on the handle 25, it becomes easier to store the package 10 in a cardboard box for transportation or to take out the package 10 from the cardboard box or the like when unpacking.

Note that the shapes and positions of the ribs 21 (including the low step portion 211), the grooves 22, the ribs 23, the ribs 24, and the handles 25 are not particularly limited, and may vary depending on the size or shape of the base body 2 in a plan view. Various changes can be made depending on the number or position of the protrusions 3, etc. Moreover, the ribs 21 may be made to protrude toward the back side, and in this case, the ribs 23 may be provided on the front side.

As shown in FIGS. 4 and 5, the protruding part 3 includes a substantially cylindrical lower part 31 that continuously extends from the base body 2 in the protruding direction (upward in the figure), and a substantially cylindrical lower part 31 that continuously extends inward in the radial direction from the lower part 31. It has a reduced diameter part 32 that is annular in plan view, an upper stage part 33 that extends continuously from the inner peripheral end of the reduced diameter part 32 in the protruding direction, and a lid part 34 that closes the opening of the upper stage part 33. That is, the protruding portion 3 protrudes from the main surface of the base body 2 in two steps.

The wall thickness t of the protrusion 3 is substantially uniform, as shown in FIG. As a result, for example, the roll receiver of Patent Document 1 described above includes a plate-like member and a protrusion integrally formed from the surface of the plate-like member, and from the tip of the protrusion to the back surface of the plate-like member. The entire wall thickness t of the protrusion 3 (particularly the wall thickness t of the lower part 31) is formed to be relatively thin compared to a roll receiver having a pipe hole that penetrates through the pipe and has the same inner diameter along the protrusion direction of the protrusion. It is possible to reduce the weight. In addition, as will be described later, in the manufacturing process of the roll body support 1, which is a pulp molded body, pulp slurry can be uniformly injected into the mold to prevent unevenness from occurring, and the press pressure during molding can be uniformly applied. Therefore, dehydration can be performed evenly and the shape of the protrusion 3 after molding can be stabilized. As a result, the manufacturing efficiency of the roll support 1 can be improved. Furthermore, the drying time when drying the protrusion 3 can be relatively shortened, and the shrinkage rate of the protrusion 3 after molding is constant, so that dimensional accuracy can be improved. Since the protruding portion 3 is inserted inside the core material 101 of the roll body 100 and supports the roll body 100, it is required to improve the stability of the shape corresponding to the shape of the inside of the core material 101 and the accuracy of the dimensions. In particular, as will be described later, since a slight gap is formed between the support portion 331 of the protrusion 3 and the inner diameter of the core material 101, it is useful to stabilize the shape of the protrusion 3 and improve dimensional accuracy. It is. In the roll support 1 according to the present embodiment, the protrusion 3 and the entire base 2 (excluding the ribs 23) are formed with substantially uniform thickness. Therefore, the protrusion 3 and the entire base body 2 (excluding the ribs 23) can be improved in manufacturing efficiency and dimensional accuracy, as in the case where the thickness t of the protrusion 3 is made approximately uniform. effect can be obtained.

In addition, the wall thickness t of the protruding portion 3 is preferably set to 3 mm or more, preferably 4 mm or more, and more preferably 5 mm or more so as to ensure the strength to support the roll body 100, and on the other hand, for the purpose of weight reduction. The length is preferably 8 mm or less, preferably 7 mm or less, and more preferably 6 mm or less. Thereby, it is possible to ensure sufficient strength to suspend the roll body 100 by the roll body support 1, and it is possible to improve transportation efficiency by reducing the weight. Note that, like the protruding part 3, the base body 2 is preferably formed integrally with the protruding part 3 by pulp molding, and has a thin and substantially uniform wall thickness t.

In addition, the density of the pulp molded body constituting the roll body support 1 is preferably 0.3 g/cm ³ or more, and 0.32 g/cm ³ or more in order to ensure sufficient strength. is more preferable. On the other hand, in order to reduce the weight of the roll support 1, the density of the molded body is preferably 0.39 g/cm ³ or less, more preferably 0.36 g/cm ³ or less.

As shown in FIG. 6, the lower stage part 31 forms a gap between the end surface of the roll body 100 and the base body 2 when the roll body 100 is suspended by the upper stage part 33. That is, the lower portion 31 functions as a spacer. Thereby, damage to the roll body 100 due to contact between the end surface of the roll body 100 and the base body 2 can be prevented. Note that the circumferential side surface of the lower step portion 31 is a tapered surface whose diameter gradually decreases toward the protruding direction.

The reduced diameter portion 32 extends from the upper end of the lower step portion 31 in a direction perpendicular to the protrusion direction and radially inward. The reduced diameter portion 32 comes into contact with the end of the core material 101 of the roll body 100 when the roll body 100 is suspended by the upper stage portion 33 . Thereby, the diameter reducing portion 32 prevents the roll body 100 from moving in the direction of the base body 2 .

Note that the outer diameter of the reduced diameter portion 32 is larger than the inner diameter of the core material 101. Further, the outer diameter of the reduced diameter portion 32 is preferably the same as the outer diameter of the core material 101, or preferably smaller than the outer diameter of the core material 101. As a result, the reduced diameter portion 32 does not come into contact with the end surface of the film 102 wound around the core material 101, and there is no risk of damaging the film 102 to be transported.

The upper part 33 is inserted into the opening of the core material 101 and suspends the roll body 100. As shown in FIG. 5, the height h of the upper stage part 33 from the upper surface of the reduced diameter part 32 is 30 mm or more, preferably 34 mm or more, more preferably 38 mm or more, in consideration of appropriately suspending the roll body 100. It is better to On the other hand, if the height h of the upper stage part 33 is too high, it becomes difficult to insert the upper stage part 33 into the opening of the core material 101. Therefore, the height h of the upper stage portion 33 is preferably 50 mm or less, preferably 46 mm or less, and more preferably 42 mm or less.

Moreover, the upper stage part 33 is comprised from the support part 331 by the side of the diameter reduction part 32, and the insertion part 332 extended in the protrusion direction from the support part 331.

The support portion 331 has a cylindrical shape extending substantially perpendicularly from the reduced diameter portion 32 . As shown in FIG. 6, the support part 331 supports the roll body 100 by the circumferential side of the support part 331 when the roll body 100 is suspended by the upper stage part 33. The difference between the outer diameter of the support portion 331 and the inner diameter of the core material 101 is preferably 0.5 to 1.5 mm. That is, when the roll body 100 is suspended by the upper stage part 33, a certain amount of gap is generated between the support part 331 and the core material 101. This facilitates insertion of the support portion 331 into the opening of the core material 101. Further, when actually supporting the roll body 100 on the roll body support 1, the roll body 100 may be covered with a cylindrical packaging film (not shown) or the like to protect the film 102. For example, the end of the packaging film enclosing the roll body 100 can be folded back into the opening of the core material 101 and housed in the opening. Even in such a case, a certain amount of gap is created between the support part 331 and the core material 101, so that the end of the packaging film can be accommodated in the opening of the core material 101, and the upper part 33 can be inserted into the opening. The roll body 100 can be suspended by being inserted. In order to appropriately accommodate the ends of the packaging film, the difference between the outer diameter of the support part 331 and the inner diameter of the core material 101 is set to be 0.5 mm or more, preferably 0.7 mm or more, and more preferably 0.9 mm or more. It is better. On the other hand, if the difference between the outer diameter of the support portion 331 and the inner diameter of the core material 101 becomes too large, the roll body 100 may move and the film 102 may be damaged. Therefore, the difference between the outer diameter of the support portion 331 and the inner diameter of the core material 101 is preferably 1.5 mm or less, preferably 1.3 mm or less, and more preferably 1.1 mm or less.

The insertion portion 332 has a tapered surface whose diameter gradually decreases toward the protrusion direction (upward in the figure). As shown in FIG. 5, the angle θ between the protruding direction of the insertion portion 332 and the tapered surface is preferably 2 degrees or more, preferably 5 degrees or more, and more preferably 7 degrees or more. This makes it easier to insert the insertion portion 332 inside the core material 101. Further, the tapered surface of the insertion portion 332 gently guides the core material 101 in order to easily fit the core material 101 and the support portion 331 together. If the angle θ of the insertion portion 332 becomes too large, it becomes difficult to gently guide the core material 101. Therefore, the angle θ is preferably 15 degrees or less, preferably 12 degrees or less, and more preferably 10 degrees or less.

The lid part 34 closes the upper opening of the upper stage part 33. Thereby, the strength of the upper stage portion 33 when the roll body 100 is suspended can be improved.

In this way, the protrusion 3 is formed in two steps, thereby improving the strength. That is, when the roll body 100 is supported by the support part 331 of the upper stage part 33, not only this support part 331 but also the lower stage part 31 can bear a part of the load of the roll body 100. The lower part 31 has a larger diameter than the support part 331. Therefore, the lower part 31 has stronger strength than the support part 331. Thereby, even if the protruding part 3 is made of paper and is formed to have a substantially uniform wall thickness t and a relatively thin thickness in order to reduce the weight, it can still have sufficient strength to support the roll body 100. In addition, from the viewpoint of making the pulp molded body thin while ensuring its strength, the roll support 1 is made from waste paper (particularly cardboard) such as cardboard, newspaper, or cardboard among the pulp molded bodies. It is preferable to use a molded body called a hard mold (Tex).

In addition, in this embodiment, the two protrusions 3 are provided on the roll body support 1 to suspend the two roll bodies 100, but the roll body support 1 may be provided with one protrusion 3. Moreover, three or more may be provided. That is, the number of protrusions 3 can be determined as appropriate depending on the number of roll bodies 100 to be suspended.

Further, the insertion portion 332 of this embodiment is formed to have a truncated conical peripheral side surface. That is, although the insertion part 332 and the lid part 34 are formed in the shape of a truncated cone, the boundary between the insertion part 332 and the lid part 34 may be chamfered if it can be easily inserted into the inside of the core material 101. The insertion portion 332 and the lid portion 34 can also be formed into a continuous hemispherical shape.

Although the embodiments have been described above, the present disclosure is not limited to the embodiments described above, and various changes can be made without departing from the spirit thereof.

Next, a method for manufacturing the roll body support 1, which is a pulp molded body, will be specifically explained.

First, natural raw material fibers containing mainly pulp fibers are prepared. The natural raw material fibers can include at least one of wood pulp fibers and non-wood pulp fibers. Alternatively, fibers taken out from waste paper may be used. Note that the fiber diameter, fiber length, blending ratio, etc. of the natural raw material fibers can be determined as appropriate. In addition, when waste paper is used as the raw material fiber, the waste paper and water are placed in a pulper tank in advance and stirred, and foreign substances such as dust are removed from the dissolved waste paper using a foreign substance removal device.

Next, the raw material fibers and water are stirred to produce pulp slurry.

Next, the pulp slurry is injected into a predetermined mold and shaped in a hydrated state. At this time, the pulp slurry is pressurized to dehydrate it. Note that the mold is provided with a discharge hole for discharging dehydrated water. Furthermore, as mentioned above, by making the wall thickness t of the entire base 2 (excluding the ribs 23) and the protrusion 3 substantially uniform, unevenness is less likely to occur in the pulp slurry injected into the mold. Since the press pressure during molding is applied uniformly, dehydration can be performed evenly and the shape of the pulp molded product after molding can be stabilized. As a result, manufacturing efficiency is improved.

Next, the dehydrated and molded roll support 1 is taken out of the mold and dried at a predetermined time and temperature. Thereby, the roll body support 1 of the pulp molded body can be obtained. As described above, the roll support 1 is formed relatively thin and substantially uniform. Therefore, the drying time when drying the pulp molded body can be relatively shortened, and the shrinkage rate of the pulp molded body becomes constant, so that dimensional accuracy can be improved.

Note that when a pulp molded body is produced using a pulp slurry with a high solid content concentration made from waste paper, a molded body called a hard mold can be obtained.

1 Roll body supporter 2 Base body, 21 Rib, 211 Low step portion, 22 Groove portion, 23 Rib, 24 Rib 3 Projection portion, 31 Lower step portion, 32 Reduced diameter portion, 33 Upper step portion, 331 Support portion,
332 insertion part, 34 lid part 10 packing body, 100 roll body, 101 core material, 102 film

Claims (7)

a plate-shaped base;
a protrusion formed to protrude from one main surface of the base,
The base body and the protrusion are integrally formed pulp molded bodies,
The protruding part includes a substantially cylindrical lower part that extends continuously from the base in the protruding direction, a reduced diameter part that continuously extends inward in the radial direction from the lower part, and an inner peripheral end of the reduced diameter part. and a substantially cylindrical upper part extending continuously in the protruding direction from the top.
The upper stage part has a cylindrical support part extending substantially perpendicularly from the diameter reducing part, and an insertion part extending from the support part in a protrusion direction and having a tapered surface whose diameter gradually decreases in the protrusion direction. death,
In the roll body support device, the wall thickness t of the protruding portion is substantially uniform. The roll body support according to claim 1,
The roll body support device wherein the wall thickness t is 3 to 8 mm. The roll body support according to claim 1 or 2,
The base body has a first rib formed on one main surface of the roll body support. The roll body support according to claim 3 ,
The base body has a groove formed on the other main surface so as to extend along the first rib,
In the roll body support, a second rib is formed in the groove portion to connect one groove side surface and the other groove side surface. The roll body support according to any one of claims 1 to 4,
A roll body support, wherein the base has a third rib extending toward a corner of the base. One roll body support according to any one of claims 1 to 5;
The other roll body support according to any one of claims 1 to 5,
comprising a substantially cylindrical core material with openings formed at both ends and a roll body having a film wound around the core material,
The roll body is supported by inserting a protrusion of the one roll body support and a protrusion of the other roll body support into each of the openings of the core material, and the roll body of the one roll body support is and the other roll support. The roll body support according to any one of claims 3 to 5,
comprising a substantially cylindrical core material with openings formed at both ends and a roll body having a film wound around the core material,
The roll body is supported by inserting a protrusion of the roll body support into an opening of the core material,
The first rib of the base of the roll body support has a low step part whose height from one main surface is lower than other parts of the first rib,
In the package, the low step portion is arranged to face a peripheral edge of an end surface of the roll body.

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