JP7614890B2 - Packaging material for building materials and assembly method thereof - Google Patents

Description

This disclosure relates to packaging materials for building materials and methods for assembling the same.

Packaging materials for packaging building materials have been known in the past. When the building materials packed in the packaging materials for building materials are long and heavy, even shifting the position of the packaged items to make them easier to carry, for example in the preparation stage before transporting the packaged items, is a difficult task.

Incidentally, although not intended for construction materials, box-shaped packaging materials are known (see, for example, Patent Document 1). The packaging material of Patent Document 1 has a handle on the top surface of the box when assembled, which can be used as a handle for carrying.

Japanese Unexamined Patent Publication No. 7-17534

When attaching a handle or band as a handle to packaging material for building materials, it becomes necessary to prepare a separate part, which incurs the cost of the part and the cost of processing the part. Furthermore, when holes are provided in the packaging material for building materials to serve as handles, there is a possibility that foreign objects may enter the interior through the holes and damage the building materials. For this reason, there is a demand for packaging material for building materials to have a handle that is easily constructed and allows the packaged item to be easily moved, for example, during the preparation stage before the packaged item is transported.

The present disclosure aims to provide a packaging material for building materials that is simply constructed and has a handle that allows the packaged items to be easily moved.

The present disclosure relates to a packaging material for building materials that includes a packaging material body formed of a single plate-like member, the packaging material body being configured to be able to form a building material storage section having a cylindrical section with an upper panel, a lower panel, and a pair of side panels, a blocking section formed at one end in the direction in which the cylindrical section extends, and a handle section provided at one end in the direction in which the cylindrical section extends in the building material storage section, the handle section having a first flap piece that extends outward from one end in the direction in which the cylindrical section extends of the upper panel and is folded downward along the way, and a second flap piece that extends outward from one end in the direction in which the cylindrical section extends of the lower panel and is folded upward along the way, the second flap piece being connected to the first flap piece while overlapping a part of the first flap piece.

1 is a perspective view showing a state in which a plurality of packages packed in the packing material for building materials of one embodiment are arranged and stacked. FIG. FIG. 2 is a perspective view showing a packaged item packed in the packing material for building materials according to one embodiment. FIG. 2 is a development view of a plate member of a packaging body in a packaging material for building materials. FIG. 13 is a diagram showing a procedure for packing building materials in a packing material, showing a state in which the building materials are placed on the board material of the packing material body. 13 is a diagram showing a procedure for packaging a building material in a packaging material, showing a state in which a cylindrical portion is formed along the circumferential direction of the building material and fixed with a sealing tape for the cylindrical portion. FIG. 13A to 13C are diagrams showing a procedure for packing building materials in packaging material, showing the state after a blocking portion has been formed. FIG. 13 is a diagram showing a procedure for packing building materials in packaging material, showing the state in which the blocking portion has been fixed with a sealing tape for the blocking portion. FIG. 13 is a diagram showing a procedure for packing building materials in packaging material, showing the state in which a handle portion has been created. FIG. 13 is a diagram showing a procedure for packing building materials in packaging material, showing the state in which the handle portion is fixed with a sealing tape for the handle portion. 13 is a diagram showing a procedure for packing building materials in packaging material, showing a state in which reinforcing tape has been attached along the circumferential direction of the cylindrical portion on the surface of one end of the cylindrical portion in the Y direction. FIG.

The packaging material 10 for building materials according to one embodiment of the present disclosure will be described below with reference to the drawings. The packaging material 10 for building materials can be used to package the building material 11. The building material 11 packaged in the packaging material 10 is referred to as package 100. In this embodiment, the longitudinal direction of the package 100 is the Y direction. The outer shape of the cross-section of the package 100 cut halfway in the Y direction is rectangular, with the direction in which the long side of the rectangle extends being the X direction, and the direction in which the short side of the rectangle extends being the Z direction. The Z direction is the up-down direction along the vertical direction when the package 100 is placed, and is a direction perpendicular to the X direction and the Y direction.

As shown in FIG. 1, multiple packages 100 containing building materials 11 are stored in a warehouse or container, stacked or with almost no gap between adjacent packages 100, or with other cargo placed next to them.

As the building material 11, for example, a heavy building material can be used. As the building material 11, for example, a beam used in a roof structure can be used. A beam is a heavy and long building material. In this embodiment, the building material 11 is formed in a long shape, and the outer shape of the cross-section when cut halfway in the longitudinal direction is formed into a rectangular shape that is long in the horizontal direction and short in the vertical direction.

The building material 11 is formed in an elongated shape, and the package 100 of the building material 11 packed in the packaging material 10 is also formed in an elongated shape to match the shape of the building material 11. The building material 11 is packed in the packaging material 10 with almost no gap between the building material 11 and the packaging material 10. In this embodiment, multiple packages 100 are stored in a warehouse or container in a stacked or lined up state, with the long side of the rectangular outer shape of the cross-sectional shape arranged as the bottom surface.

The building material packaging material 10 is formed in a shape symmetrical with respect to the center in the Y direction. Therefore, in this embodiment, the configuration of one end side of the building material packaging material 10 in the Y direction is described, and the description of the configuration of the other end side of the building material packaging material 10 in the Y direction is omitted. The description of the configuration of the other end side of the building material packaging material 10 in the Y direction can be made by referring to the description of the configuration of one end side of the building material packaging material 10 in the Y direction.

As shown in FIG. 2, the packaging material 10 for building materials comprises, at one end in the Y direction, a packaging material body 1, a sealing tape 61 for the tubular portion, two sealing tapes 62 for the closing portion, two sealing tapes 63 for the handle portion, and two reinforcing tapes 64. As described below, the packaging material body 1 is formed by assembling a single sheet of board material 70 (see FIG. 3), such as cardboard. In the assembled state in which the packaging material body 11 is packed, as shown in FIG. 2, the packaging material body 1 comprises a building material storage section 2 and a handle section 5. The building material storage section 2 has a tubular section 3 and a closing section 4.

As shown in FIG. 2, the cylindrical portion 3 is formed in a rectangular cylindrical shape and extends in the Y direction. The cylindrical portion 3 has an upper surface plate 31, a lower surface plate 32, and a pair of side surfaces 33. The pair of side surfaces 33 has one side surface plate 34 and the other side surface plate 35. The other side surface plate 35 is composed of the other side surface plate outer plate 351 and the other side surface plate overlap plate 352.

When the packaging material body 1 is assembled to form the tubular portion 3, the other side panel 35 is formed by overlapping the other side panel outer panel 351 and the other side panel overlapping panel 352. The other side panel outer panel 351 is fixed to the lower panel 32 by the tubular portion sealing tape 61 while overlapping the other side panel overlapping panel 352.

The blocking portion 4 is formed at one end in the Y direction of the cylindrical portion 3. The blocking portion 4 is provided at one end in the Y direction of the upper plate 31, the lower plate 32, and the pair of side plates 33 so as to block the ends in the Y direction of the cylindrical portion 3.

The blocking portion 4 has a first blocking piece 41 and a second blocking piece 42. The first blocking piece 41 is formed by extending outward in the Y direction from one end in the Y direction of one of the pair of side panels 33, a side panel 34, and is bent toward the other side panel 35. The second blocking piece 42 is formed by extending outward in the Y direction from one end in the Y direction of the other side panel 35, and is bent toward the one side panel 34. The first blocking piece 41 is connected to the second blocking piece 42 while overlapping it.

The blocking section 4 is fixed by two blocking section sealing tapes 62. The two blocking section sealing tapes 62 are arranged and attached at positions spaced apart in the vertical direction. The two blocking section sealing tapes 62 are each formed to extend horizontally and are attached across the building material storage section 2 and the blocking section 4. The two blocking section sealing tapes 62 are each attached from one side panel 34 of the building material storage section 2, across the front of the blocking section 4 in the horizontal direction, to the other side panel 35 of the building material storage section 2.

As the sealing tape 62 for the sealing portion, for example, a packaging tape such as polypropylene tape (PP tape) is used, which has a base material made of polypropylene film and an adhesive applied to the adhesive surface.

As shown in FIG. 2, the handle portion 5 is provided at one end in the Y direction of the cylindrical portion 3 of the building material storage portion 2. The handle portion 5 is provided so as to protrude outward in the Y direction from the blocking portion 4 of the building material storage portion 2. The length in the X direction of the front portion 5c of the handle portion 5 is formed to be shorter than the length in the X direction of the packaged item 100.

The handle portion 5 has a first flap piece 51 and a second flap piece 52. The first flap piece 51 is formed by extending outward from one end of the top panel 31 in the Y direction and bending it downward midway.

The first flap piece 51 has a first flap piece extension plate 511, a pair of first flap piece inclined reinforcement parts 512, and a first flap piece bent plate 513. The first flap piece extension plate 511 is formed with a length in the X direction that is shorter than the length in the X direction of the top plate 31 of the building material storage section 2, and extends outward in the Y direction from the Y direction end of the top plate 31 of the building material storage section 2.

The first flap piece folding plate 513 is folded downward from the outer end of the first flap piece extension plate 511 in the Y direction and extends downward a predetermined length.

A pair of first flap piece inclined reinforcement parts 512 are provided at both ends in the X direction of the first flap piece extension plate 511 in the portion where the first flap piece extension plate 511 and the top panel 31 are continuous. The first flap piece inclined reinforcement parts 512 are continuous in a state where the length in the X direction of the first flap piece extension plate 511 is shorter than the length in the X direction of the top panel 31, thereby reinforcing the right-angled corner formed between the Y direction end of the top panel 31 and the X direction end of the first flap piece extension plate 511 at both ends in the X direction of the first flap piece extension plate 511.

The first flap piece inclined reinforcement portion 512 is formed in a generally triangular shape that connects the Y-direction end of the top panel 31 and the X-direction end of the first flap piece extension plate 511. The outer edge of the first flap piece inclined reinforcement portion 512 is inclined and curved from the outside to the inside in the X direction as it moves outward in the Y direction.

The second flap piece 52 extends outward from one end of the lower panel 32 in the Y direction and is folded upward along the way to extend a predetermined length upward. The second flap piece 52 is connected to the first flap piece 51 while overlapping a portion of the first flap piece 51.

The second flap piece 52 has a second flap piece extension plate 521, a pair of second flap piece inclined reinforcement parts 522, and a second flap piece bent plate 523. The second flap piece extension plate 521 is formed with a length in the X direction that is shorter than the length in the X direction of the bottom plate 32 of the building material storage section 2, and extends outward in the Y direction from the Y direction end of the bottom plate 32 of the building material storage section 2.

The second flap piece bending plate 523 is bent upward from the outer end in the Y direction of the second flap piece extension plate 521 and extends upward a predetermined length. The first flap piece bending plate 513 is overlapped on the second flap piece bending plate 523. The first flap piece bending plate 513 is connected to the second flap piece 52 while overlapping the second flap piece bending plate 523.

A pair of second flap piece inclined reinforcement parts 522 are provided at both ends in the X direction of the second flap piece extension plate 521 in the portion where the second flap piece extension plate 521 and the bottom panel 32 are continuous. The second flap piece inclined reinforcement parts 522 are continuous in a state where the length in the X direction of the second flap piece extension plate 521 is shorter than the length in the X direction of the bottom panel 32, thereby reinforcing the right-angled corner formed between the Y direction end of the bottom panel 32 and the X direction end of the second flap piece extension plate 521 at both ends in the X direction of the second flap piece extension plate 521.

The second flap piece inclined reinforcement portion 522 is formed in a generally triangular shape that connects the Y-direction end of the lower panel 32 and the X-direction end of the second flap piece extension plate 521. The outer edge of the second flap piece inclined reinforcement portion 522 is inclined and curved from the outside to the inside in the X-direction as it moves outward in the Y-direction.

The handle portion 5 configured as described above is configured by overlapping and connecting a portion of the first flap piece 51 (the first flap side folded plate 513 described later) and a portion of the second flap piece 52 (the second flap side folded plate 523 described later) at a position away from the blocking portion 4 on the outside in the Y direction by the first flap piece 51 and the second flap piece 52.

As a result, the handle portion 5 is formed in a closed shape at the upper surface portion 5a, the lower surface portion 5b, and the front surface portion 5c, and is formed with both side portions in the X direction open. Since the length of the handle portion 5 in the X direction is shorter than the length of the packaged item 100 in the X direction, even if another packaged item 100 is placed next to it, the worker can easily insert his or her hands from both sides in the X direction and easily place his or her hands on it.

As shown in FIG. 2, the handle portion 5 is fixed by two handle portion sealing tapes 63. The two handle portion sealing tapes 63 are attached across the building material storage portion 2 and the handle portion 5. The two handle portion sealing tapes 63 are attached from the upper surface plate 31 of the building material storage portion 2, extending vertically along the front surface of the front portion 5c of the handle portion 5, to the lower surface plate 32 of the building material storage portion 2.

The two sealing tapes 63 for the handle portion are spaced apart in the X direction. The two sealing tapes 63 for the handle portion are attached to the front surface 5c of the handle portion 5, extending in the Z direction along the end in the X direction. The sealing tape 63 for the handle portion is folded at the upper end of the front surface 5c toward the upper surface 5a of the handle portion 5 and the upper surface plate 31 of the building material storage portion 2, and the portion attached along the end in the X direction of the front surface 5c of the handle portion 5 is extended to the other end in the Y direction on the upper surface 5a of the handle portion 5 and the upper surface plate 31 of the building material storage portion 2. The handle sealing tape 63 is folded at the lower end of the front surface 5c towards the lower surface 5b of the handle 5 and the lower surface plate 32 of the building material storage section 2, and the portion attached along the X-direction end of the front surface 5c of the handle 5 is extended on the lower surface 5b of the handle 5 and the lower surface plate 32 of the building material storage section 2, and is attached by extending to the other end in the Y direction.

The handle sealing tape 63 is made by stacking three or more sheets of tape that are commonly used for packaging cardboard. For example, packaging tape such as polypropylene tape (PP tape) is used as the handle sealing tape 63. The base material is made of polypropylene film and the adhesive surface is coated with an adhesive.

The handle sealing tape 63 is not limited to this, and may be configured to have an adhesive strength equivalent to that of three or more layers of tape commonly used for packaging cardboard.

The sealing tape 62 for the sealing portion and the sealing tape 63 for the handle portion are reinforced by the reinforcing tape 64. The reinforcing tape 64 has an upper reinforcing tape 641 and a lower reinforcing tape 642.

After the sealing tape for the closing section 62 and the sealing tape for the handle section 63 are attached, the upper reinforcing tape 641 and the lower reinforcing tape 642 are attached to the Y-direction end of the cylindrical section 3 of the building material storage section 2 along the circumferential direction of the cylindrical section 3. The upper reinforcing tape 641 and the lower reinforcing tape 642 are attached to the upper surface of a part of the sealing tape for the closing section 62 and the sealing tape for the handle section 63 in a crossed state and overlapping with the sealing tape for the closing section 62 and the sealing tape for the handle section 63, along the circumferential direction of the cylindrical section 3, reinforcing the state in which the sealing tape for the closing section 62 and the sealing tape for the handle section 63 are attached.

Specifically, the upper reinforcing tape 641 is affixed in the circumferential direction along approximately half the upper circumference of the cylindrical portion 3 on the circumferential surface of one end of the cylindrical portion 3 in the Y direction. In more detail, the upper reinforcing tape 641 is affixed in the circumferential direction of the cylindrical portion 3 along approximately half the upper surface of the cylindrical portion 3, straddling a part of the sealing tape 62 for the closing portion affixed to the pair of side plates 33, a part of the sealing tape 63 for the handle portion affixed to the top plate 31, and the top plate 31.

The lower reinforcing tape 642 is attached along the circumferential direction of approximately half the lower circumference of the tubular portion 3 on the circumferential surface of one end of the tubular portion 3 in the Y direction. In detail, the lower reinforcing tape 642 is attached along the circumferential direction of the tubular portion 3, straddling a part of the sealing tape 62 for the closing portion attached to the pair of side panels 33, a part of the sealing tape 63 for the handle portion attached to the lower panel 32, and the lower panel 32, along approximately half the lower surface of the tubular portion 3.

The upper reinforcing tape 641 and the lower reinforcing tape 642 may be, for example, a packaging tape such as polypropylene tape (PP tape) formed by coating the adhesive surface with a polypropylene film as the base material.

The building material packaging body 1 is formed from a single cardboard plate 70 (plate-shaped member) as shown in FIG. 3. In the unfolded state, the plate 70 of the packaging body 1 is formed as a flat plate extending in the first direction D1 and the second direction D2 as shown in FIG. 3, and in the packed state, the single cardboard plate 70 is folded and assembled as shown in FIG. 2. In the unfolded state, the packaging body 1 is formed long in the first direction D1. In the packed state of the building material 11, the building material 11 is arranged with its longitudinal direction aligned with the longitudinal direction of the packaging body 1.

In this embodiment, the plate material 70 of the packaging material body 1 is formed in a shape symmetrical with respect to the center of the first direction D1 in the unfolded state. Therefore, the following description will focus on the configuration of one end side of the packaging material body 1 in the first direction D1, and the description of the configuration of the other end side of the packaging material body 1 in the first direction D1 will be omitted.

As shown in Fig. 3, the plate material 70 of the packaging material main body 1 in the unfolded state mainly comprises the other side panel surface side forming part 71, the upper panel forming part 72, one side panel forming part 73, the lower panel forming part 74, and the other side panel overlapping panel forming part 75. As shown in Fig. 3, the other side panel surface side forming part 71, the upper panel forming part 72, one side panel forming part 73, the lower panel forming part 74, and the other side panel overlapping panel forming part 75 are formed to have the same length in the first direction D1, and are formed continuously in this order from one side (upper side in Fig. 3) to the other side (lower side in Fig. 3) in the second direction D2 via fold lines 761, 762, 763, 764.

As shown in Figures 2 and 3, the upper plate forming part 72 (see Figure 3) is a part that forms the upper plate 31 (see Figure 2) of the building material storage part 2. The lower plate forming part 74 (see Figure 3) is a part that forms the lower plate 32 (see Figure 2) of the building material storage part 2. One of the side plate forming parts 73 (see Figure 3) is a part that forms one of the side plates 34 (see Figure 2) of the building material storage part 2.

The other side panel surface side forming portion 71 (see FIG. 3) and the other side panel overlapping plate forming portion 75 (see FIG. 3) are portions that form the other side panel 35 (see FIG. 2) of the building material storage portion 2. When the packaging material main body 1 is assembled, the other side panel surface side forming portion 71 (see FIG. 3) and the other side panel overlapping plate forming portion 75 (see FIG. 3) form the other side panel 35 (see FIG. 2) by overlapping the other side panel surface side forming portion 71 on the other side panel overlapping plate forming portion 75 and arranging the other side panel outer plate 351 (see FIG. 2) and the other side panel overlapping plate 352 (see FIG. 2) in an overlapping manner.

As shown in FIG. 3, the upper plate forming portion 72 and the lower plate forming portion 74 are formed in the same rectangular shape extending in the first direction D1 in a plan view. When the packaging material body 1 is assembled, the upper plate forming portion 72 and the lower plate forming portion 74 form the upper plate 31 and the lower plate 32 that are arranged parallel to each other and facing each other, as shown in FIG. 2.

As shown in FIG. 3, one side plate forming portion 73 and the other side plate front surface forming portion 71 are formed in the same rectangular shape extending in the first direction D1 in a plan view. The width in the second direction D2 of one side plate forming portion 73 and the other side plate front surface forming portion 71 is formed to be smaller than the width in the second direction D2 of the upper plate forming portion 72 and the lower plate forming portion 74.

The other side panel overlapping plate forming portion 75 is the portion that overlaps with the other side panel surface side forming portion 71 when the packaging material main body 1 is assembled, and the width of the other side panel overlapping plate forming portion 75 in the second direction D2 is formed to be approximately the same as or slightly smaller than the width of the other side panel surface side forming portion 71 in the second direction D2.

When the other side panel surface forming portion 71, the upper panel forming portion 72, one side panel forming portion 73, the lower panel forming portion 74 and the other side panel overlapping panel forming portion 75 are formed into a cylindrical shape by valley folding along fold lines 761, 762, 763 and 764, the other side panel surface forming portion 71 and the other side panel overlapping panel forming portion 75 are overlapped to form the other side panel 35 as shown in FIG. 2. As shown in FIG. 2, the lower panel 32 and the other side panel 35 are fixed by a sealing tape 61 for the cylindrical portion.

In addition to this configuration, as shown in FIG. 3, the plate material 70 of the packaging material main body 1 includes a first blocking piece 41 formed at each of both ends in the first direction D1 of one side plate forming portion 73, a second blocking piece 42 formed at each of both ends in the first direction D1 of the other side plate surface forming portion 71, a first flap piece 51 formed at each of both ends in the first direction D1 of the upper plate forming portion 72, and a second flap piece 52 formed at each of both ends in the first direction D1 of the lower plate forming portion 74.

The first blocking piece 41 and the second blocking piece 42 are parts that form the blocking portion 4 (see FIG. 2) of the building material storage portion 2. The first flap piece 51 and the second flap piece 52 are parts that form the handle portion 5 (see FIG. 2).

As shown in FIG. 3, the first blocking piece 41 extends outward in the first direction D1 from the end of one of the side panel forming parts 73 in the first direction D1. The first blocking piece 41 is formed in a rectangular shape when viewed in a plan view when the packaging material body 1 is in an unfolded state. The first blocking piece 41 extends outward in the first direction D1 from the end of one of the side panel forming parts 73 in the first direction D1 with a width equal to the width of one of the side panel forming parts 73 in the second direction D2.

The second blocking piece 42 extends outward in the first direction D1 from the end of the surface forming portion 71 of the other side panel in the first direction D1. The second blocking piece 42 is formed in a rectangular shape in a plan view of the unfolded state of the packaging material body 1. The second blocking piece 42 extends outward in the first direction D1 from the end of the surface forming portion 71 of the other side panel in the first direction D1 with a width equal to the width of the surface forming portion 71 of the other side panel in the second direction D2. When the packaging material body 1 is assembled, the second blocking piece 42 is connected to the first blocking piece 41 while overlapping it, as shown in FIG. 2.

When the packaging material body 1 is assembled, the first blocking piece 41 and the second blocking piece 42 are arranged in a stacked state to block the end of the tubular portion 3 in the first direction D1, thereby forming the blocking portion 4.

3, the first flap piece 51 has a first flap piece extension plate 511, a pair of first flap piece inclined reinforcement portions 512, and a first flap piece folded plate 513. The first flap piece extension plate 511 extends outward in the first direction D1 from the end of the top plate forming portion 72 in the first direction D1. No fold line is formed at the boundary between the first flap piece extension plate 511 and the top plate forming portion 72, and when the packaging material body 1 is assembled, the first flap piece extension plate 511 and the top plate forming portion 72 are formed continuously in a flat plane, as shown in FIG. 2.

As shown in FIG. 3, the first flap piece inclined reinforcement portion 512 is provided at both ends in the second direction D2 in the portion where the first flap piece extension plate 511 and the top plate forming portion 72 are continuous. The first flap piece inclined reinforcement portion 512 is formed in a substantially triangular shape connecting the ends of the first flap piece extension plate 511 and the top plate forming portion 72 in the first direction D1 and the end of the first flap piece extension plate 511 in the second direction D2. The outer edge of the first flap piece inclined reinforcement portion 512 is formed to be inclined and curved from the outside to the inside of the second direction D2 as it moves outward in the first direction D1.

The first flap side folding plate 513 is connected to the end of the first flap piece extension plate 511 in the first direction D1 on the outside of the first direction D1 via a folding line 511a. When assembling the packaging material body 1, the first flap piece 51 is folded by the folding line 511a, as shown in FIG. 2.

As shown in FIG. 3, the second flap piece 52 has a second flap piece extension plate 521, a pair of second flap piece inclined reinforcement portions 522, and a second flap piece folded plate 523. The second flap piece extension plate 521 extends outward in the first direction D1 from the end of the bottom panel forming portion 74 in the first direction D1. No fold line is formed at the boundary between the second flap piece extension plate 521 and the bottom panel forming portion 74, and when the packaging material body 1 is assembled, the second flap piece extension plate 521 and the bottom panel forming portion 74 are formed continuously in a flat plane.

The second flap piece inclined reinforcement portion 522 is provided at both ends in the second direction D2 in the portion where the second flap piece extension plate 521 and the bottom plate forming portion 74 are continuous. The second flap piece inclined reinforcement portion 522 is formed in a substantially triangular shape connecting the ends in the first direction D1 of the second flap piece extension plate 521 and the bottom plate forming portion 74 and the end in the second direction D2 of the second flap piece extension plate 521. The outer edge of the second flap piece inclined reinforcement portion 522 is formed to be inclined and curved from the outside to the inside of the second direction D2 as it moves outward in the first direction D1.

The second flap side folding plate 523 is connected to the end of the second flap piece extension plate 521 in the first direction D1 on the outside of the first direction D1 via a folding line 521a. When assembling the packaging material body 1, the second flap piece 52 is folded by the folding line 521a, as shown in FIG. 2.

Next, a method for assembling the packaging material 10 for the building material 11 will be described. The packaging material body 1 is composed of a single plate material 70, and can be assembled from the unfolded state of the single plate material 70. First, as shown in FIG. 4A, with the plate material 70 of the packaging material body 1 in the unfolded state, the building material 11 is placed on top of the bottom plate forming portion 74.

Next, from the state shown in FIG. 4A, the fold lines 761, 762, 763, and 764 are folded in a valley to form the upper panel 31, the lower panel 32, and the pair of side panels 33 as shown in FIG. 4B, and the other side panel surface side forming portion 71 is overlapped with the other side panel overlapping panel forming portion 75 to form the other side panel 35, forming the tubular portion 3 arranged along the circumferential direction of the building material 11 (tubular portion forming process). The lower panel 32 and the other side panel 35 are fixed by attaching a tubular portion sealing tape 61.

Next, after forming the tubular portion 3, the blocking portion 4 is formed as shown in FIG. 4C. Specifically, from the state shown in FIG. 4B, the second blocking piece 42 is bent toward one side panel 34. Then, the first blocking piece 41 is bent toward the other side panel 35 so as to overlap the second blocking piece 42. This forms the blocking portion 4 arranged to block the Y-direction end of the tubular portion 3 with the first blocking piece 41 and the second blocking piece 42 overlapping, as shown in FIG. 4C.

Then, as shown in FIG. 4D, the blocking portion 4 is fixed with two blocking portion sealing tapes 62. Specifically, the two blocking portion sealing tapes 62 are attached so as to straddle the building material storage portion 2 and the blocking portion 4. The two blocking portion sealing tapes 62 are each attached from one side panel 34 of the building material storage portion 2, across the front surface of the blocking portion 4 in the horizontal direction, to the other side panel 35 of the building material storage portion 2. In this way, the blocking portion 4 is fixed with the two blocking portion sealing tapes 62.

Next, in the state shown in FIG. 4D, the portion extending outward in the Y direction from one end of the lower panel 32 of the second flap piece 52 in the Y direction is folded upward at the fold line 521a, thereby folding the second flap side folding plate 523 upward. Then, the first flap side folding plate 513 extending outward in the Y direction from one end of the upper panel 31 of the first flap piece 51 in the Y direction is folded downward at the fold line 511a, thereby folding the first flap side folding plate 513 downward and placing it on top of the second flap side folding plate 523 of the second flap piece 52. As a result, as shown in FIG. 4E, the first flap side folding plate 513 of the first flap piece 51 and the second flap side folding plate 523 of the second flap piece 52 are overlapped, and the handle portion 5 is formed (handle portion forming process).

Then, as shown in FIG. 4F, two sealing tapes 63 for the handles are applied across the building material storage section 2 and the handle section 5. Specifically, the two sealing tapes 63 for the handles are applied from the upper panel 31 of the building material storage section 2 to the lower panel 32 of the building material storage section 2, passing through the front surface of the front portion 5c of the handle section 5 so as to extend vertically (sealing tape application process). As a result, the handle section 5 is fixed by the two sealing tapes 63 for the handles.

Next, as shown in FIG. 4G, the sealing tape 62 for the sealing portion and the sealing tape 63 for the handle portion are applied, and then the upper reinforcing tape 641 and the lower reinforcing tape 642 are applied.

Specifically, the upper reinforcing tape 641 is affixed circumferentially to the surface of one end of the cylindrical portion 3 in the Y direction, over approximately half the circumference of the upper side of the cylindrical portion 3. In more detail, the upper reinforcing tape 641 is affixed so as to straddle a portion of the handle sealing tape 63 affixed to the top plate 31, a portion of the blocking portion sealing tape 62 affixed to the side plate 33, and the top plate 31 (reinforcing tape attachment process).

The lower reinforcing tape 642 is also attached circumferentially along the surface of one end of the tubular portion 3 in the Y direction, over approximately half the circumference of the lower side of the tubular portion 3. In detail, the lower reinforcing tape 642 is attached so as to straddle a portion of the handle sealing tape 63 attached to the lower panel 32 and a portion of the blocking portion sealing tape 62 attached to the side panel 33, as well as the lower panel 32 (reinforcing tape attachment process).

In this manner, the building material packaging material 10 can be assembled to package the building material 11.

According to this embodiment, the following effects are achieved. The packaging material 10 for building materials of this embodiment is a packaging material for building materials that includes a packaging material body 1 formed from a single plate-like member 70, and the packaging material body 1 is formed from a single plate material 70 and can form a cylindrical portion 3 having an upper panel 31, a lower panel 32, and a pair of side panels 33, a building material storage section 2 having a blocking portion 4 formed at one end of the cylindrical portion 3 in the Y direction, and a handle portion 5 provided at one end of the building material storage section 2 in the direction in which the cylindrical portion 3 extends. The handle portion 5 has a first flap piece 51 that extends outward from one end of the upper panel 31 in the direction in which the tubular portion 3 extends and is folded downward along the way, and a second flap piece 52 that extends outward from one end of the lower panel 32 in the direction in which the tubular portion 3 extends and is folded upward along the way, and is connected to the first flap piece 51 while overlapping a portion of the first flap piece 51.

Therefore, the packaging material body 1 can be assembled from a single plate material 70, and the handle portion 5 can be formed with a simple configuration in which a portion of the first flap piece 51 and the second flap piece 52 are connected in an overlapping state. This allows the packaging material 10 to be simply constructed, and the handle portion 5 can be configured to easily move the packaged item 100. Therefore, by placing a hand on the simply constructed handle portion 5, the packaged item 100 can be easily shifted to an appropriate position for easy carrying, for example, during the preparation stage before transporting the packaged item 100.

In this embodiment, the construction material storage section 2 and the handle section 5 are covered with a sealing tape 63 for the handle section, which is attached across the construction material storage section 2 and the handle section 5 and extends vertically from the upper plate 31 of the construction material storage section 2 to the lower plate 32 of the construction material storage section 2 via the front surface of the handle section 5, and a reinforcing tape 64 having an upper reinforcing tape 641 attached across a part of the sealing tape 63 for the handle section attached to the upper plate 31 and the upper plate 31, and a lower reinforcing tape 642 attached across a part of the sealing tape 63 for the handle section attached to the lower plate 32 and the lower plate 32. As a result, the sealing tape 63 for the handle section can fix the handle section 5 to the construction material storage section 2, and the reinforcing tape 64 can reinforce the sealing tape 63 for the handle section so that it does not peel off from the construction material storage section 2. Therefore, the handle section 5 can be firmly fixed.

In addition, in this embodiment, the handle sealing tape 63 is made by attaching three or more layers of tape commonly used for packaging cardboard, or is made with an adhesive strength equivalent to the adhesive strength of three or more layers of tape commonly used for packaging cardboard. This allows the handle 5 to be fixed even more firmly by further firmly fixing the handle sealing tape 63.

In this embodiment, the method includes a cylindrical portion forming process in which the plate material 70 is folded to form the upper plate 31, the lower plate 32, and a pair of side plates 33, thereby forming the cylindrical portion 3 arranged along the building material 11, and a handle forming process in which, after the cylindrical portion forming process, the first flap piece 51 is folded downward at the midpoint of the portion extending outward from one end of the upper plate 31 in the direction in which the cylindrical portion 3 extends, and the second flap piece 52 is folded upward at the midpoint of the portion extending outward from one end of the lower plate 32 in the direction in which the cylindrical portion 3 extends, thereby forming the handle portion 5 with a portion of the first flap piece 51 and the second flap piece 52 overlapping each other. This allows the packaging material 10 to be easily assembled by folding one sheet of plate material 70.

In addition, in this embodiment, the handle portion forming process includes a sealing tape application process in which the handle portion sealing tape 63 is applied from the upper plate 31 of the building material storage section 2 to the lower plate 32 of the building material storage section 2 so as to extend vertically along the front surface of the handle portion 5, and a reinforcing tape application process in which, after the sealing tape application process, the upper reinforcing tape 641 is applied so as to straddle a part of the handle portion sealing tape 63 applied to the upper plate 31 and the upper plate 31, and the lower reinforcing tape 642 is applied so as to straddle a part of the handle portion sealing tape 63 applied to the lower plate 32 and the lower plate 32. As a result, the handle portion sealing tape 63 can be fixed to the building material storage section 2, and the reinforcing tape 64 can reinforce the handle portion sealing tape 63 so that it does not peel off from the building material storage section 2. This allows the handle 5 to be easily and securely fixed.

Although a preferred embodiment of the present disclosure has been described above, the present disclosure is not limited to the above-described embodiment and can be modified as appropriate.

For example, in the above embodiment, the plate-shaped member of the building material packaging material 10 is a cardboard plate, but this is not limited to this. It may be a cardboard or plastic plate, etc.

In the above embodiment, in the packaging material 10 for building materials, the configuration of the building material storage section 2 and the handle section 5 of the packaging material body 1 is provided at both ends in the longitudinal direction of a single plate-shaped member, but this is not limited to this. For example, the configuration of the building material storage section 2 and the handle section 5 of the packaging material body 1 may be provided only at one end in the longitudinal direction of a single plate-shaped member. Also, for example, when the building material is long, the packaging material body 1 in the packaging material 10 for building materials may be composed of multiple plate-shaped members. When the packaging material body 1 is composed of multiple plate-shaped members, it is sufficient that at least one plate-shaped member includes a configuration that can form the building material storage section 2 and the handle section 5 of the packaging material body 1.

In addition, in the above embodiment, a portion of the first flap piece 51 (first flap side folding plate 513 described later) is arranged overlapping the front side of a portion of the second flap piece 52 (second flap side folding plate 523 described later) in the handle portion 5, but this is not limited to the above. Conversely, a portion of the second flap piece 52 (second flap side folding plate 523 described later) may be arranged overlapping the front side of a portion of the first flap piece 51 (first flap side folding plate 513 described later).

In addition, in the above embodiment, the upper reinforcing tape 641 and the lower reinforcing tape 642 are formed from separate reinforcing tapes, but this is not limited thereto. The upper reinforcing tape 641 and the lower reinforcing tape 642 may be formed from an integrated reinforcing tape that is continuously formed along the circumferential direction of the tubular portion 3.

1 Packing material body, 2 Building material storage section, 3 Cylindrical section, 4 Closure section, 5 Handle section, 10 Packing material for building materials, 31 Top plate, 32 Bottom plate, 33 Side plate, 51 First flap piece, 52 Second flap piece, 63 Sealing tape for handle section, 64 Reinforcement tape, 70 Plate material (plate-shaped member), 641 Upper reinforcing tape, 642 Lower reinforcing tape

Claims (5)

A packaging material for building materials, comprising a packaging material body formed of a single plate-shaped member,
The packaging material body is
A building material storage section including a cylindrical portion having an upper surface plate, a lower surface plate, and a pair of side surfaces, and a blocking portion formed at one end of the cylindrical portion in the extending direction;
A handle portion is provided at one end of the building material storage portion in the direction in which the cylindrical portion extends,
The handle portion of this packaging material for building materials has a first flap piece that extends outward from one end of the upper panel in the direction in which the tubular portion extends and is folded downward along the way, and a second flap piece that extends outward from one end of the lower panel in the direction in which the tubular portion extends and is folded upward along the way, the second flap piece being connected to the first flap piece while being overlapped with a portion of the first flap piece. A sealing tape for the handle portion is attached across the building material storage portion and the handle portion, and is attached from the upper surface plate of the building material storage portion to the lower surface plate of the building material storage portion by extending vertically along the front surface of the handle portion;
The packaging material for building materials as described in claim 1, further comprising a reinforcing tape having an upper reinforcing tape that is attached across a portion of the sealing tape for the handle portion attached to the upper panel and the upper panel, and a lower reinforcing tape that is attached across a portion of the sealing tape for the handle portion attached to the lower panel and the lower panel. The packaging material for building materials according to claim 2, wherein the sealing tape for the handle is made of three or more layers of tape commonly used for packaging cardboard, or has an adhesive strength equivalent to that of three or more layers of tape commonly used for packaging cardboard. A method for assembling the building material packaging material according to any one of claims 1 to 3 from a single plate-like member in an unfolded state, comprising the steps of:
a cylindrical portion forming process for forming the cylindrical portion arranged along a circumferential direction of the building material by forming the upper plate, the lower plate, and the pair of side plates from the plate-like member;
a handle forming process, which includes, after the tubular portion forming process, folding downward midway a portion of the first flap piece that extends outward from one end of the upper panel in the direction in which the tubular portion extends, and bending upward midway a portion of the second flap piece that extends outward from one end of the lower panel in the direction in which the tubular portion extends, to form the handle with portions of the first flap piece and the second flap piece overlapping. In the handle forming step, a sealing tape for a handle is attached from the upper plate of the building material storage part to the lower plate of the building material storage part so as to extend vertically along the front surface of the handle part.
5. The method for assembling packaging material for building materials as described in claim 4, further comprising a reinforcing tape applying step of, after the sealing tape applying step, applying an upper reinforcing tape so as to straddle a portion of the sealing tape for the handle portion applied to the upper plate and the upper plate, and applying a lower reinforcing tape so as to straddle a portion of the sealing tape for the handle portion applied to the lower plate and the lower plate.

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