JP7653379B2 - Packaging material and packaging unit including same - Google Patents

Description

The present invention relates to a packaging material for packaging an item, and a packaging unit equipped with the same.

Conventionally, when transporting a packaged object, the packaged object is packed in a packing material and then housed in a packing box for transport (see, for example, Patent Document 1). Such a packing material includes a bottom packing material that packs the bottom of the packaged object, and a pair of top packing materials that pack the top of the packaged object.

In the packaging material described in Patent Document 1, a pair of concave grooves or a pair of convex ridges are provided in the bottom packaging material to position the periphery that forms the contour of the bottom of the packaged item. The distance between the pair of concave grooves or the pair of convex ridges is set to be the same as the width of the packaged item. This allows the packaged item to be easily positioned relative to the bottom packaging material by arranging the bottom periphery of the packaged item along the inner edges of the pair of concave grooves or the pair of convex ridges.

Utility Model Registration No. 3187439

However, in the packaging material described in Patent Document 1, the pair of grooves or the pair of ridges are often located in positions that are difficult for workers to see, making it difficult to place the packaged item and packaging material in the correct positions within the packaging box, and the ease of packaging is not good.

The present invention was made in consideration of these points, and its purpose is to provide a packaging material that can improve the workability of packaging work, and a packaging unit equipped with the same.

In consideration of the above problem, the packaging material of the present invention is a packaging material that holds a packaged object inserted from an opening of a packaging box toward the bottom at the bottom, and is characterized in that when the packaged object is pushed toward the bottom, the packaging material moves while changing its posture at the bottom of the packaging box from a first posture before holding the packaged object to a second posture in which the packaged object is held.

According to the packaging material of the present invention, when the packaged item is pushed toward the bottom of the packaging box, the packaging material moves while changing its posture from a first posture to a second posture at the bottom of the packaging box. In other words, when the packaged item is pushed toward the bottom, the packaging material moves to a position where it can hold the packaged item, and the packaged item can be held by the packaging material in the second posture at that position. In this way, in the present invention, the packaging of the packaged item using the packaging material is premised on the change in posture and movement of the packaging material by pushing the packaged item toward the bottom of the packaging box. Therefore, for example, even if the packaging material in the first posture is slightly misaligned from the appropriate position with respect to the bottom of the packaging box, the misalignment can be corrected by pushing the packaged item, and the posture of the packaging material can be changed to the second posture and moved to the appropriate posture and position where the packaged item can be held. In this way, the workability of the packaging work of the packaged item can be improved.

In a preferred embodiment, when in the first position, a position holding part is formed that abuts against the bottom and holds the first position against the bottom, and a receiving part is formed that receives a load from the packaged item toward the bottom, and when in the second position, a holding part is formed that holds the packaged item, and when the packaged item that has applied a load to the receiving part is pushed toward the bottom, it moves along the bottom while rotating relative to the bottom, and the packaged item is held by the holding part.

According to this aspect, since the packaging material has a posture holding portion that holds the first posture against the bottom, the packaging material is easily set to the first posture and the posture is easily stabilized. Thereafter, when the packaged object with a load applied to the receiving portion is pushed into the bottom side of the packaging box, the packaging material rotates with respect to the bottom, changing its posture to the second posture, and the packaging material is moved along the bottom to a position where it can hold the packaged object. At this position, the packaged object can be held by the packaging material in the second posture. In this way, in order to complete the posture change and movement of the packaging material, it is only necessary to push the packaged object toward the bottom side, simplifying the packaging work. This improves the workability of the packaging work for the packaged object.

In a preferred embodiment, a bottom abutment is formed that abuts against the bottom when in the second position, and the bottom abutment is formed inside the packaging box in a direction along the bottom of the packaging box, further inside than the position holding portion, so that a rotation space is formed between the bottom abutment and the bottom when in the first position, allowing the packaging material to rotate to the second position, and when changing the position from the first position to the second position, the packaging material moves along the bottom while rotating so that the bottom abutment closes the rotation space.

According to this aspect, when changing the position from the first position to the second position, the packaging material rotates so that the bottom contact portion collapses the rotation space. Therefore, when the change in position and movement of the packaging material is complete, the bottom contact portion can be brought into contact with the bottom of the packaging box. This allows the packaging material to be stably positioned on the bottom of the packaging box, and ultimately allows the packaged item to be stably held by the packaging material.

In a preferred embodiment, the posture-maintaining portion, in the first posture, has a protruding portion that protrudes from the surface facing the bottom toward the bottom and makes linear or point contact with the bottom, and when the packaged item, which applies a load to the receiving portion, is pushed toward the bottom, the protruding portion moves along the bottom of the packaging box while the packaging material rotates relative to the bottom.

According to this aspect, when the packaged item with a load applied to the receiving portion is pushed toward the bottom side of the packaging box, the protruding portion moves along the bottom of the packaging box, thereby moving the packaging material to a position where it can hold the packaged item. While moving in this manner, the packaging material rotates relative to the bottom, and as a result, the packaging material changes its posture to the second posture at a position where it can hold the packaged item. Because the protruding portion is in line or point contact with the bottom, it is possible to reduce frictional resistance at the bottom during the movement of the protruding portion. Therefore, even when a smaller load is applied to the receiving portion, the packaging material can be moved to a position where it can hold the packaged item while changing to the second posture, improving workability in the packaging operation.

In a preferred embodiment, the receiving portion includes a first receiving portion that receives a load from the packaged item toward the bottom when inserted from the first position, and a second receiving portion that receives a load from the packaged item toward the bottom when inserted from a position between the first position and the second position, and the second receiving portion is formed between the first receiving portion and the position holding portion in a direction along the bottom of the packaging box in a position between the first position and the second position.

According to this aspect, the packaged object, which has applied a load to the first receiving portion, is pushed toward the bottom side of the packaging box, and the packaging material moves along the bottom while changing its first posture. That is, the load applied to the first receiving portion changes the first posture (i.e., the packaging material rotates). Here, in a posture between the first posture and the second posture, the second receiving portion is formed between the first receiving portion and the posture holding portion, so that the load acting on the packaging material from the packaged object is transferred from the first receiving portion to the second receiving portion by continuing to push the packaged object toward the bottom side of the packaging box. In this way, the packaging material receives a load through the first receiving portion, and then can continue to receive a load from the packaged object through the second receiving portion. Therefore, by pushing the packaged object, the packaging material can continue to correct its own position, and can move while changing its posture to the second posture to a posture and position where it can hold the packaged object. Therefore, the packaged object can be stably held by the packaging material while improving the workability in the packaging work.

This application further discloses a packaging unit. The packaging unit according to the present invention is characterized by comprising the above-mentioned packaging material and the packaging box.

With the packaging unit of the present invention, even if, for example, an operator's hand comes into contact with the packaging material or the packaging box when inserting an item to be packaged into a packaging box and the packaging material contained in the packaging box moves from the correct position, the packaging material can be moved to the correct position and posture to hold the item by pushing in the item to correct the misalignment and changing its posture to the second posture. In this way, the workability of packaging the item can be improved.

The packaging material of the present invention and the packaging unit equipped with the same can improve the workability of packaging operations.

1 is a schematic exploded perspective view for explaining a packaging material according to a first embodiment of the present invention; 2 is a perspective view showing a packaging unit in which an object to be packaged is packaged using the packaging material shown in FIG. 1 and housed in a packaging box; FIG. 2A and 2B are perspective views each showing the packaging material shown in FIG. 1 , where FIG. 2A is a perspective view seen from one direction, and FIG. 2B is a perspective view seen from another direction. 2A to 2C are schematic cross-sectional views illustrating how the posture and position of the packaging material shown in FIG. 1 are changed, where (a) shows a first posture and its position of the packaging material, and (b) shows a second posture and its position of the packaging material. 2A and 2B are schematic diagrams illustrating the procedure for packing an object using the packaging material shown in FIG. 1, in which (a) shows the packaging material placed in a packaging box, (b) shows the object inserted in the packaging box, and (c) shows the object packed in the packaging material. 5A and 5B are schematic diagrams showing a packaging material according to a second embodiment of the present invention, in which (a) is an oblique view seen from one direction, and (b) is a side view showing a first posture of the packaging material installed in a packaging box. 5A and 5B are schematic diagrams showing a packaging material according to a third embodiment of the present invention, in which (a) is an oblique view from one direction, (b) is a side view showing a first attitude and its position of the packaging material placed in a packaging box, (c) is a side view showing a second attitude and its position of the packaging material placed in a packaging box, (d) is an arrow view seen from direction D shown in (c), and (e) is an arrow view seen from direction E shown in (c). 8A to 8C are schematic cross-sectional views illustrating how the posture of the packaging material shown in FIG. 7 is changed, where (a) shows a first posture and its position of the packaging material, (b) shows a posture and its position of the packaging material between the first posture and the second posture, and (c) shows a second posture and its position of the packaging material.

The following describes the packaging material according to an embodiment of the present invention and the packaging unit using the same, with reference to the drawings.

First Embodiment
FIG. 1 is a schematic exploded perspective view for explaining the packaging material according to the first embodiment of the present invention. FIG. 2 is a perspective view showing a packaging unit in a state in which an object to be packaged is packaged using the packaging material shown in FIG. 1 and the packaged unit is housed in a packaging box. FIG. 3 is a schematic perspective view showing the packaging material shown in FIG. 1, where (a) is a perspective view seen from one direction, and (b) is a perspective view seen from another direction. FIG. 4 is a schematic cross-sectional view showing a state in which the attitude and position of the packaging material shown in FIG. 1 are changed, where (a) shows the first attitude and position of the packaging material, and (b) shows the second attitude and position of the packaging material. The bottom side packaging material 10A shown in FIG. 4 is seen in the A-A cross section of FIG. 3. FIG. 5 is a schematic view showing a procedure for packaging an object to be packaged using the packaging material shown in FIG. 1, where (a) shows a state in which the packaging material is placed in the packaging box, (b) shows a state in which the object to be packaged is inserted into the packaging box, and (c) shows a state in which the object to be packaged is packaged by the packaging material.

As shown in Figures 1 and 2, the packaging unit 100 includes a packaging box 50 and multiple packaging materials 10, 10, ... for packaging the packaged item M contained in the packaging box 50. The packaging materials 10 include two bottom-side packaging materials 10A that are held at the bottom 52 of the packaging box 50, and two opening-side packaging materials 10B that hold the packaged item M on the opening 51 side of the packaging box 50. The "packaging material" in this invention corresponds to the bottom-side packaging material 10A.

The packing box 50 is formed by a bottom 52 having a rectangular shape in a plan view and a side 53 standing upright from the periphery of the bottom 52. The packing box 50 has an opening 51 on the inner periphery of the end face of the side 53 opposite the bottom 52. The packaged item M is inserted from the opening 51 of the packing box 50 toward the bottom 52. When the packaged item M is packed by the bottom side packing material 10A and the opening side packing material 10B, the bottom side packing material 10A and the opening side packing material 10B are abutted against and restrained by the side 53 of the packing box 50. In this embodiment, the packing box 50 is illustrated in a state in which the opening 51 faces upward, but the orientation of the opening 51 of the packing box 50 is not limited to this, and for example, the packing box 50 may be arranged so that the opening 51 faces horizontally.

The bottom side packaging material 10A and the opening side packaging material 10B are molded bodies made of foamed resin, and may be, for example, in-mold foamed molded bodies made of foamed beads. The material of the bottom side packaging material 10A and the opening side packaging material 10B may be a thermoplastic resin. Examples of the thermoplastic resin include polystyrene resin, polyolefin resin (e.g., polypropylene resin, polyethylene resin), polyester resin (e.g., polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, or polylactic acid), or polycarbonate resin. The bottom side packaging material 10A and the opening side packaging material 10B may be made of bead method expanded polystyrene (EPS), bead method expanded polypropylene (EPP), or expanded polyethylene (EPE). As shown in Figures 1 and 3, the bottom side packaging material 10A is a long packaging material extending in the longitudinal direction L and arranged along one side of the rectangular bottom 52.

3 and 4(a), the bottom packaging material 10A is formed with a posture retaining portion 11 that contacts the bottom 52 and retains the first posture P1 relative to the bottom 52 when in the first posture P1. The first posture P1 is the posture of the bottom packaging material 10A before it retains the packaged object M. The posture retaining portion 11 contacts the bottom 52 and retains the first posture P1 when the packaging box 50 is placed so that the opening 51 faces upward. Specifically, the posture retaining portion 11 has an opposing surface 11a that faces the bottom 52 in the first posture P1 and extends in the longitudinal direction L. In other words, the posture retaining portion 11 is in surface contact with the bottom 52 at the opposing surface 11a in the first posture P1, thereby retaining the first posture P1.

When the bottom-side packaging material 10A is housed in the packaging box 50, the posture-maintaining portion 11 has an inner edge RC located on the inside of the packaging box 50 in the direction along the bottom 52 in the first posture P1, and an outer edge RD located on the outside of the packaging box 50 in the direction along the bottom 52. The inner edge RC and the outer edge RD are edges of the opposing surface 11a of the posture-maintaining portion 11. Because the bottom-side packaging material 10A is in surface contact with the bottom 52 at the opposing surface 11a, it is easy to set the bottom-side packaging material 10A in the first posture P1, and the posture is easy to stabilize.

3 and 4(a), the bottom side packaging material 10A is formed with a receiving portion 16 that receives a load from the packaged object M toward the bottom 52 in the first position P1. The receiving portion 16 is an edge of the holding portion 15, which is described later and is located inside the packaging box 50 in the direction along the bottom 52 in the first position P1. The receiving portion 16 is located inside the position holding portion 11 in the direction along the bottom 52 of the packaging box 50 in the first position P1. Specifically, the receiving portion 16 is located inside the inner edge RC of the position holding portion 11 in the first position P1. In this embodiment, the receiving portion 16 is illustrated as extending in the longitudinal direction L of the bottom side packaging material 10A, but the receiving portion 16 may be formed only at both ends in the longitudinal direction L of the bottom side packaging material 10A, or may be formed only in the center in the longitudinal direction L.

3 and 4(b), the bottom side packaging material 10A is formed with a holding portion 15 that holds the packaged object M when in the second position P2. The second position P2 is the position of the bottom side packaging material 10A that holds the packaged object M. In this embodiment, the holding portion 15 has a surface parallel to the bottom 52 of the packaging box 50 and a surface parallel to the side 53 of the packaging box 50 in the second position P2 of the bottom side packaging material 10A. In the second position P2 of the bottom side packaging material 10A, the holding portion 15 is in surface contact with the packaged object M from the bottom 52 side and the side 53 side of the packaging box 50. Therefore, the packaged object M can be stably held by the bottom side packaging material 10A. The holding portion 15 may be in surface contact with the packaged object M, and may not be parallel to the bottom 52 and the side 53, for example, depending on the external shape of the packaged object M.

3 and 4(b), the bottom-side packaging material 10A is formed with a bottom abutment portion 13 that abuts against the bottom 52 when in the second position P2. The bottom abutment portion 13 is formed on the inside of the packaging box 50 in the direction along the bottom 52 of the packaging box 50, further inside than the position-maintaining portion 11, so that a rotation space RS that rotates the bottom-side packaging material 10A to the second position P2 is formed between the bottom abutment portion 13 and the bottom 52 when in the first position P1 (particularly FIG. 4(a)). Specifically, the bottom abutment portion 13 is greatly separated from the bottom 52 from the inner edge RC of the position-maintaining portion 11 toward the inside of the packaging box 50 when in the first position P1. In this embodiment, the bottom contact portion 13 is a surface that extends diagonally (diagonally upward in the figure) from the inner edge RC of the position holding portion 11 toward the inside of the packaging box 50 when in the first position P1, and is a surface that comes into surface contact with the bottom 52 of the packaging box 50 when in the second position P2.

3 and 4(b), the bottom packaging material 10A is formed with a side abutment 14 that abuts against the side 53 of the packaging box 50 in the second posture P2. The side abutment 14 is formed on the outside of the packaging box 50 in the direction along the bottom 52 of the packaging box 50, further than the posture retaining portion 11, so that a movement space RT for moving the bottom packaging material 10A to the side 53 is formed between the side abutment 14 and the side 53 in the first posture P1 (particularly FIG. 4(a)). Specifically, the side abutment 14 is greatly separated from the bottom 52 from the outer edge RD of the posture retaining portion 11 toward the outside of the packaging box 50 in the first posture P1. In this embodiment, the side contact portion 14 is a surface that extends obliquely (diagonally upward in the drawing) from the outer edge RD of the position holding portion 11 toward the outside of the packaging box 50 when in the first position P1, and is a surface that comes into surface contact with the side portion 53 of the packaging box 50 when in the second position P2.

As shown in FIG. 3, the bottom packaging material 10A has a longitudinal abutment portion 19 formed at both ends in the longitudinal direction L. The inner faces 19b of the longitudinal abutment portions 19, which face each other, abut the packaged object M, and the outer faces 19a facing each other abut the side portion 53 of the packaging box 50. The packaged object M abuts the inner face 19b of the longitudinal abutment portion 19 and is held in the longitudinal direction L, so that in the second position P2 of the bottom packaging material 10A, the packaged object M can be stably held in the longitudinal direction L. In addition, the bottom packaging material 10A abuts the outer face 19a of the longitudinal abutment portion 19 against the side portion 53 of the packaging box 50 and is held in the longitudinal direction L, so that the bottom packaging material 10A can be stably positioned on the side portion 53 of the packaging box 50. So far, we have explained the configuration of the bottom-side packaging material 10A according to this embodiment, but the opening-side packaging material 10B has the same configuration as the bottom-side packaging material 10A, so we will not explain it here.

The packaging procedure using the bottom-side packaging material 10A will be described. As shown in FIG. 5(a), two bottom-side packaging materials 10A are inserted into the internal space of the packaging box 50 from the opening 51 toward the bottom 52, and are arranged along one side extending parallel to each other at the bottom 52 of the packaging box 50. Specifically, the outer surface 19a of the bottom-side packaging material 10A is moved along the side 53 of the packaging box 50 until the opposing surface 11a of the posture maintaining portion 11 contacts the bottom 52. As a result, the bottom-side packaging material 10A is arranged on the bottom 52 of the packaging box 50 in the first posture P1. At this time, since the opposing surface 11a of the posture maintaining portion 11 is in surface contact with the bottom 52, it is easy to set the bottom-side packaging material 10A to the first posture P1.

Next, as shown in Figures 4(a) and 5(b), the packaged item M is inserted from the opening 51 of the packaging box 50 toward the bottom 52. Specifically, the packaged item M is inserted into the packaging box 50 until it contacts the receiving portion 16 of the bottom packaging material 10A. Then, the packaged item M is pushed toward the bottom 52. As shown in Figures 4(a) and 4(b), when the packaged item M is pushed toward the bottom 52, the bottom packaging material 10A is moved while changing its position at the bottom 52 of the packaging box 50 from the first position P1 to the second position P2. Here, in the state of Figure 5(a), the bottom packaging material 10A may be positioned slightly out of position relative to the bottom 52 of the packaging box 50. Even in such a case, the bottom packaging material 10A is pushed in by the packaged item M to correct the misalignment, and the bottom packaging material 10A is moved to the appropriate posture and position for holding the packaged item M while changing its posture to the second posture P2 (FIGS. 4(b) and 5(c)). In this way, the workability of packaging the packaged item M can be improved.

The change in position and movement of the bottom-side packaging material 10A due to the pushing of the packaged object M will be described in detail. As shown in FIG. 4(a) and FIG. 4(b), when the packaged object M with a load applied to the receiving portion 16 is pushed toward the bottom portion 52, the bottom-side packaging material 10A moves along the bottom portion 52 while rotating with respect to the bottom portion 52, and the packaged object M is held by the holding portion 15. As shown in FIG. 4(b), when the packaged object M is pushed toward the bottom portion 52, the bottom-side packaging material 10A rotates with respect to the bottom portion 52, changing its position to the second position P2, and the bottom-side packaging material 10A moves toward the side portion 53 along the bottom portion 52 to a position where the packaged object M can be held. In this way, in order to complete the change in position and movement of the bottom-side packaging material 10A, it is only necessary to push the packaged object M toward the bottom portion 52, and the packaging work is simplified. Therefore, the workability of the packaging work of the packaged object M can be improved.

The change in position and movement of the bottom packaging material 10A due to the pushing of the packaged object M will be described in more detail. As shown in Figures 4(a) and 4(b), when the position is changed from the first position P1 to the second position P2, the bottom packaging material 10A moves along the bottom 52 while the bottom contact portion 13 rotates to crush the rotation space RS. When the packaged object M is pushed toward the bottom 52 side, the bottom packaging material 10A moves toward the side 53 of the packaging box 50 while crushing the rotation space RS by rotating in the direction of the arrow RR. As shown in Figures 5(b) and 5(c), when the packaged object M is pushed toward the bottom 52 side, the two bottom packaging materials 10A simultaneously move toward the side 53 of the packaging box 50 while crushing the rotation space RS.

As a result, the bottom-side packaging material 10A abuts against the bottom 52 at the bottom abutment portion 13 and against the side 53 at the side abutment portion 14, and in this state, the change in position and movement of the bottom-side packaging material 10A is completed. At this time, the packaged item M is held by the holding portion 15 from the bottom 52 side and the side 53 side of the packaging box 50. In this way, with the bottom-side packaging material 10A's change in position and movement completed, the bottom abutment portion 13 can be abutted against the bottom 52 and the side abutment portion 14 can be abutted against the side 53, and the packaged item M can be held by the holding portion 15 from two directions, the bottom 52 side and the side 53 side. Therefore, the bottom-side packaging material 10A can be stably positioned on the bottom 52 of the packaging box 50 without using tape or the like, and the packaged item M can be stably held to the bottom-side packaging material 10A.

In this embodiment, a rotation space RS is formed between the bottom contact portion 13 and the bottom 52 in the first position P1, and the bottom-side packaging material 10A moves along the bottom 52 while rotating so that the bottom contact portion 13 collapses the rotation space RS. However, the bottom-side packaging material may be formed in a cylindrical shape whose axis coincides with the center of rotation, and a part of its periphery may be cut out to function as a receiving portion. In this case, the bottom-side packaging material receives a load from the packaged item M at the receiving portion, and moves along the bottom 52 on the periphery of the cylinder while rotating around the rotation center (i.e., rotating around the axis) relative to the bottom 52 without collapsing the rotation space. As a result, the position change and movement of the bottom-side packaging material can be completed.

After the bottom-side packaging material 10A has completed packaging the packaged item M, the opening-side packaging material 10B packs the packaged item M from the opening 51 side. The opening-side packaging material 10B holds the packaged item M from the opening 51 side with a holding portion (corresponding to the holding portion 15 of the bottom-side packaging material 10A).

Second Embodiment
Next, a bottom-side packaging material 10C as a packaging material according to a second embodiment of the present invention will be described. Fig. 6 is a schematic diagram of the packaging material according to the second embodiment of the present invention, in which (a) is a perspective view seen from one direction, and (b) is a side view showing a first posture of the packaging material installed in a packaging box. The bottom-side packaging material 10C according to this embodiment differs from the bottom-side packaging material 10A according to the first embodiment in the configuration of the posture retaining portion 11. Hereinafter, the same reference numerals are used to designate components having the same or similar functions as the bottom-side packaging material 10A according to the first embodiment, and the description thereof is omitted, and the different parts will be described.

6(a) and 6(b), the posture retaining portion 11 has a protruding portion 11b that protrudes from the opposing surface 11a facing the bottom 52 toward the bottom 52 in the first posture P1 and makes linear or point contact with the bottom 52. As shown in FIG. 6(b), the protruding portion 11b is provided on the edge of the opposing surface 11a along the longitudinal direction L of the bottom side packaging material 10A in the first posture P1 of the bottom side packaging material 10C. A plurality of protruding portions 11b (three each in FIG. 6(a)) are provided along the longitudinal direction L of the bottom side packaging material 10C. The protruding portions 11b are tapered from the opposing surface 11a side toward the tip, so that the protruding portions 11b make linear or point contact with the bottom 52. In this embodiment, the protruding portion 11b has a shape in which the end of a cylinder is cut off at a plane that intersects with the axis of the cylinder, and the protruding portion 11b has an arc-shaped ridgeline that corresponds to part of the periphery (arc) of the end face of the cylinder, and this ridgeline is in line contact with the bottom 52. Note that the tip of the protruding portion 11b that contacts the bottom 52 may be needle-shaped, in which case the protruding portion 11b is in point contact with the bottom 52.

In the bottom-side packaging material 10C according to this embodiment, when the packaged object M with a load applied to the receiving portion 16 is pushed toward the bottom portion 52, the protruding portion 11b moves along the bottom portion 52 of the packaging box 50, and the bottom-side packaging material 10C is moved to a position where it can hold the packaged object M. While moving in this manner, the bottom-side packaging material 10C rotates relative to the bottom portion 52, and as a result, the posture of the bottom-side packaging material 10C is changed to the second posture P2 at a position where it can hold the packaged object M. Since the protruding portion 11b is in line contact or linear contact with the bottom portion 52, the frictional resistance at the bottom portion 52 during the movement of the protruding portion 11b can be reduced. Therefore, even if the load applied to the receiving portion 16 is smaller, the bottom-side packaging material 10C can be moved to a position where it can hold the packaged object M, improving the workability of the packaging work.

Third Embodiment
Next, a bottom-side packaging material 10D as a packaging material according to a third embodiment of the present invention will be described. Figure 7 is a diagram showing a packaging material according to a third embodiment of the present invention, where (a) is a perspective view seen from one direction, (b) is a side view showing a first posture and its position of the packaging material installed in the packaging box, (c) is a side view showing a second posture and its position of the packaging material installed in the packaging box, (d) is an arrow view seen from the direction D shown in (c), and (e) is an arrow view seen from the direction E shown in (c). Figure 8 is a schematic cross-sectional view explaining how the posture of the packaging material shown in Figure 7 is changed, where (a) shows the first posture and its position of the packaging material, (b) shows the posture and its position between the first posture and the second posture of the packaging material, and (c) shows the second posture and its position of the packaging material. The bottom-side packaging material 10D shown in Figure 8 is seen in the B-B cross section of Figure 7(a).

The bottom-side packaging material 10D according to this embodiment differs from the bottom-side packaging material 10A according to the first embodiment in the configuration of the receiving portion 16 and in that a first inclined surface 21 and a second inclined surface 23 are provided. Below, components having the same or similar functions as the bottom-side packaging material 10A according to the first embodiment are given the same reference numerals and their description is omitted, and only the different parts are described.

7 and 8, the receiving portion 16 includes a first receiving portion 16a (particularly FIG. 8(a)) that receives a load from the packaged object M toward the bottom 52 when inserted from the first position P1, and a second receiving portion 16b (particularly FIG. 8(b)) that receives a load from the packaged object M toward the bottom 52 when inserted from a position between the first position P1 and the second position P2. In this embodiment, the receiving portion 16 (i.e., the first receiving portion 16a and the second receiving portion 16b) are illustrated as extending in the longitudinal direction L of the bottom side packaging material 10D, but the receiving portion 16 may be formed along the longitudinal direction L at both ends of the bottom side packaging material 10D in the longitudinal direction L, or may be formed only in the center of the bottom side packaging material 10D in the longitudinal direction L.

As shown in FIG. 8(a), the first receiving portion 16a is located inside the inner edge RC of the position holding portion 11 in the first position P1, and is located closest to the opening 51 of the bottom side packaging material 10D. As a result, when the packaged object M is inserted into the packaging box 50, the first receiving portion 16a first receives a load from the packaged object M. The second receiving portion 16b is formed inside the bottom side packaging material 10D from the first receiving portion 16a. The second receiving portion 16b is an edge of the holding portion 15, which is described later, that is located inside the packaging box 50 in the direction along the bottom 52 in the first position P1. As shown in FIG. 8(b), the second receiving portion 16b is formed between the first receiving portion 16a and the inner edge RC of the position holding portion 11 in the direction along the bottom 52 of the packaging box 50 in a position between the first position P1 and the second position P2. As a result, by continuing to push the packaged item M toward the bottom 52 of the packaging box 50, the load acting on the bottom packaging material 10D from the packaged item M is transferred from the first receiving portion 16a to the second receiving portion 16b.

Therefore, the bottom-side packaging material 10D receives a load through the first receiving portion 16a, and then continues to receive a load from the packaged item M through the second receiving portion 16b. Therefore, by pushing in the packaged item M, the bottom-side packaging material 10D can continue to correct its own position while changing its posture to the second posture P2 and moving to a posture and position where it can hold the packaged item M. This improves the workability of the packaging operation, and allows the packaged item M to be stably held by the bottom-side packaging material 10D.

As shown in FIG. 7(a), the bottom packaging material 10D is formed with a holding portion 15 that holds the packaged item M when in the second position P2. The holding portion 15 extends in the longitudinal direction L. Therefore, the packaged item M can be stably held by the holding portion 15 along the longitudinal direction of the bottom packaging material 10D.

As shown in FIG. 7, both ends of the bottom-side packaging material 10D in the longitudinal direction L are shaped such that, in the second posture P2, the gap D2 (FIG. 7(e)) between the bottom 52 and the side 53 and the gap D1 (FIG. 7(d)) between the bottom 52 and the side 53 increase as the bottom 52 moves toward the outer surface 19a along the longitudinal direction L of the bottom 52. Specifically, as shown in FIG. 7, the bottom 52 has a first inclined surface 21 that connects the surface of the bottom abutment 13 that abuts against the bottom 52 and the outer surface 19a of the longitudinal abutment 19 in the second posture P2. As shown in FIG. 7(e), the first inclined surface 21 moves away from the bottom 52 as the bottom abutment 13 moves toward the outer surface 19a of the longitudinal abutment 19 in the second posture P2 along the longitudinal direction L. This forms the gap D2.

As shown in FIG. 7, the bottom packaging material 10D has a second inclined surface 23 that connects the surface of the side contact portion 14 that contacts one side portion 53 and the outer surface 19a of the longitudinal side contact portion 19 in the second posture P2. As shown in FIG. 7(d), in the second posture P2, the second inclined surface 23 moves away from the side portion 53 along the longitudinal direction L as it moves from the surface of the side contact portion 14 to the outer surface 19a of the longitudinal side contact portion 19. This forms a gap D1.

By having the first inclined surface 21 and the second inclined surface 23, the area of the outer surface 19a of the longitudinal abutment portion 19 can be made smaller than that of the bottom side packaging material 10A according to the first embodiment. This makes it possible to reduce the frictional resistance between the outer surface 19a of the bottom side packaging material 10D and the side portion 53 of the packaging box 50 when inserting the bottom side packaging material 10D into the packaging box 50. In addition, it is possible to reduce the frictional resistance between the outer surface 19a of the bottom side packaging material 10D and the side portion 53 of the packaging box 50 when changing the position and moving the bottom side packaging material 10D by pushing in the packaged item M. This allows the packaging work to proceed smoothly, improving the workability of the packaging work.

The packaging procedure using the bottom-side packaging material 10D will be described. As shown in FIG. 8(a), the packaged object M is inserted from the opening 51 of the packaging box 50 until it contacts the first receiving portion 16a of the bottom-side packaging material 10D arranged on the bottom 52 of the packaging box 50. After that, the packaged object M is pushed toward the bottom 52. As shown in FIG. 8(b), when the packaged object M is pushed toward the bottom 52, the first attitude P1 of the bottom-side packaging material 10D is changed (i.e., the packaging material 10D rotates), and the first receiving portion 16a is separated from the packaged object M. When the packaged object M continues to be pushed toward the bottom 52, the packaged object M applies a load to the second receiving portion 16b of the bottom-side packaging material 10D. In other words, the bottom-side packaging material 10D receives a load from the packaged object M through the second receiving portion 16b. The bottom packaging material 10D is continuously loaded by the packaged item M through the first receiving portion 16a and the second receiving portion 16b, and is moved while changing its posture from the first posture P1 to the second posture P2 at the bottom 52 of the packaging box 50. As a result, the packaged item M is held by the holding portion 15. In this way, by pushing the packaged item M, the bottom packaging material 10D can continue to correct its own position while changing its posture to the second posture P2 and moving to a posture and position where it can hold the packaged item M. This improves the workability of the packaging operation, and allows the packaged item M to be stably held by the bottom packaging material 10D.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the bottom packaging materials 10A, 10C, and 10D according to the above-mentioned embodiments, and the packaging unit 100 including the same, but includes all aspects included in the concept of the present invention and the scope of the claims. In addition, each configuration may be appropriately and selectively combined to achieve the above-mentioned problems and effects. For example, the shape, material, arrangement, size, etc. of each component in the above-mentioned embodiment may be appropriately changed depending on the specific aspect of the present invention.

For example, in the above embodiment, the long bottom packaging materials 10A, 10C, and 10D are arranged along one side of the rectangular bottom 52. However, four short bottom packaging materials 10A, 10C, and 10D may be prepared and arranged at the four corners of the bottom 52 of the packaging box 50. Also, in the above embodiment, an example was described in which a pair of bottom packaging materials 10A, 10C, and 10D arranged along one side of the rectangular bottom 52 change position and move simultaneously when the packaged item M is pushed in. However, only one of the pair of bottom packaging materials 10A, 10C, and 10D, the bottom packaging material 10A, may change position and move when the packaged item M is pushed in.

10A, 10C, 10D: bottom side packaging material (packaging material), 11: attitude maintaining portion, 11a: opposing surface, 11b: protruding portion, 13: bottom abutment portion, 15: holding portion, 16: receiving portion, 16a: first receiving portion, 16b: second receiving portion, 50: packaging box, 51: opening, 52: bottom, 100: packaging unit, M: item to be packaged, P1: first attitude, P2: second attitude, RS: rotation space

Claims (5)

A packaging material that holds an object inserted from an opening of a packaging box toward a bottom at the bottom,
When the object to be packed is pushed toward the bottom side, the packaging material is moved while changing its posture at the bottom of the packaging box from a first posture before holding the object to a second posture holding the object,
a position-maintaining portion that comes into contact with the bottom portion and maintains the first position against the bottom portion when the container is in the first position, and a receiving portion that receives a load from the object toward the bottom portion,
When the container is in the second position, a holding portion that holds the object to be packed is formed,
This packaging material is characterized in that when the packaged item is pushed toward the bottom side with a load applied to the receiving portion, the packaged item moves along the bottom while rotating relative to the bottom, and the packaged item is held by the holding portion . When the second position is taken, a bottom abutment portion that abuts against the bottom portion is formed,
the bottom contact portion is formed on the inside of the packaging box in a direction along the bottom of the packaging box relative to the posture maintaining portion so that a rotation space for rotating the packaging material to the second posture is formed between the bottom contact portion and the bottom when the packaging material is in the first posture,
The packaging material according to claim 1, characterized in that, when changing its position from the first position to the second position, the packaging material is moved along the bottom while rotating so that the bottom abutment portion collapses the rotation space. the position maintaining portion has a protruding portion that protrudes from a surface facing the bottom portion toward the bottom portion in the first position and that makes linear or point-like contact with the bottom portion;
The packaging material according to claim 1 or 2, characterized in that when the packaged item with a load applied to the receiving portion is pushed toward the bottom portion, the packaging material is rotated relative to the bottom portion while the protruding portion moves along the bottom portion of the packaging box. the receiving portion includes a first receiving portion that receives a load from the object to be packaged toward the bottom portion when the object is inserted from the first position;
a second receiving portion that receives a load from the object to be packed toward the bottom portion when the object is inserted from a position between the first position and the second position,
The packaging material according to any one of claims 1 to 3, characterized in that, in a position between the first position and the second position, the second receiving portion is formed between the first receiving portion and the position maintaining portion in a direction along the bottom of the packaging box. The packaging material according to any one of claims 1 to 4 ,
A packaging unit comprising the packaging box.

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