JP2021020699A - Packaging container and plate material of the same - Google Patents

Abstract

To provide a packaging container having structure that easily falls when standing in an axial direction and plate material for the same that can assemble the packaging container by bending and pasting key points of single plate material.SOLUTION: A packaging container (A) has a square cylindrical body (1). Four vertices (V1, V2, V3, V4) of any end (3) of the body are formed such that they are on the same plane and each vertex is on four different vertical cross-sections (P11, P21, P31, UL; P12, P22, P32, DL), respectively, with respect to the body (1).SELECTED DRAWING: Figure 10

Description

The present invention relates to a packaging container and a plate material for a packaging container that is assembled by bending and pasting the key points of a single plate. Specifically, the present invention has a rod-like shape whose axial length is longer than that in the cross-sectional direction. The present invention relates to a packaging container suitable for packaging an article (hereinafter referred to as a rod-shaped article).

Conventionally, a packaging container having a rod-shaped article such as a toner cartridge as an object to be packaged has been known.

Utility Model Registration No. 3172544

The paper container described in Patent Document 1 is assembled as a container by bending and pasting key points of a single paper plate material. This paper container is provided with a square tubular body portion, a lid portion for closing the openings on one end side and the other end side, and a lid flap, and the lid flap is sequentially bent inward via a folding line. As a structure for closing the lid, it is suitable for packaging an article (object to be packaged) having a protruding portion at the tip, such as a toner cartridge used in a printing machine or a copying machine.

When transporting, rod-shaped articles such as toner cartridges are often stored in containers one by one, and a plurality of containers are packed together, transported, and stored. In particular, since the toner cartridge contains powdered toner ink inside, if the toner cartridge is stored upright in the axial direction, the toner ink accumulated at the bottom of the toner cartridge tends to solidify, and when used. May cause malfunctions such as toner clogging.
For this reason, toner cartridge packaging containers often have a label on the surface of the packaging container that warns them to store them horizontally, but due to storage space restrictions, they are not stored horizontally and are erected in the axial direction. It tends to be stored in a state.

Therefore, it has become necessary to prevent trying to place it in such an upright state. On the other hand, there is still a strong need to make it easy to assemble from a single conventional plate material. In consideration of these points, the inventor made a diligent study and devised the shape of the packaging container for packaging the rod-shaped article. More specifically, it is an object of the present invention to provide a packaging container in which the lid surface at the axial end of the container in contact with the floor is formed in a shape that easily falls.

(Solution 1)
In order to achieve the above object, the packaging container of the present invention is a packaging container provided with a square tubular body, and the four vertices of one or both ends of the body are coplanar. It is characterized in that each vertex is formed so as to be on four different vertical cross sections with respect to the body portion.

Because of this formation, if the end is placed upright in the axial direction so that it is vertical to the horizontal plane, only one point will be in contact with the floor surface, and this point will be the fulcrum. Moment works, and even if it does not fall in a stationary state, it can be easily fallen. Further, even if two points are in contact with each other, the easiness of falling is maintained because the three points try to fall until they touch the ground. In addition, since the four points are different, they always try to fall sideways even when leaning against them.

(Solution 2)
Further, in the above-mentioned packaging container, when the end portion is placed on a horizontal plane so as to be a ground contact surface, a vertical straight line passing through the center of gravity of the packaging container is formed so as to pass outside the ground contact surface. Is preferable.

By doing so, since the center of gravity is deviated from the ground plane, the packaging container cannot be statically balanced, so that the packaging container is not only physically prone to fall, but also has the necessity of falling.

(Solution 3)
Further, it is preferable that at least one end portion is provided with a lid portion that can be opened and closed.

When the lid plate is provided at the end portion in this way, it becomes easier to put in and take out a rod-shaped article which is long in the axial direction as compared with providing it at the body portion.

(Solution 4)
Further, it is preferably formed by bending and pasting a single plate material.

By doing so, it is possible to provide a packaging container that can be easily assembled with a small number of man-hours and a large number of people.

(Solution 5)
A plate material for a packaging container made of a single sheet of paper, the plate material having different distances d2 and d3.
It has a left side plate, a back plate, a right side plate, a front plate and a glue margin plate that are continuous in the width direction through a folding line, and the left side plate, the back plate, the right side plate, and the front plate have the same width. ,
The left side plate has a lid flap and a bottom lid, and the lid flap is provided so that the left end thereof is at a distance d2 from the upper reference line and the right end is at a distance d2 + d3 from the upper reference line. The bottom lid is connected to the left side plate via a folding line, and the bottom lid is provided so that the left end is at a distance d2 from the lower reference line and the right end is at a distance d2 + d3 from the lower reference line. It is connected to the left side plate via
The back plate has a lid and a bottom lid, and the lid is provided so that the left end thereof is at a distance d2 + d3 from the upper reference line and the right end is at a distance d3 from the upper reference line. It is connected to the back plate via a fold line, further the lid has a plug, the plug is connected to the lid via a fold line parallel to the fold line, and the fold line is in the middle portion thereof. A notch for locking the lid is provided, and the bottom lid is provided so that the left end thereof is at a distance d2 + d3 from the lower reference line and the right end is at a distance d3 from the lower reference line. In addition to being connected to the back plate via a folded wire, the bottom lid further has a glue margin for attachment.
The right side plate has a lid flap and a bottom lid, and the lid flap has a polygonal line provided so that the left end thereof is at a distance d3 from the upper reference line and the right end thereof is on the upper reference line. The bottom lid is connected to the right side plate via a folding line provided so that the left end thereof is at a distance d3 from the lower reference line and the right end thereof is located at the lower reference line. Connected to
The front plate has a locking piece and a bottom lid, and the locking piece has an edge provided so that the left end thereof is on the upper reference line and the right end thereof is at a distance d2 from the upper reference line. The bottom lid is provided so as to be inserted into the plug and project convexly to lock the lid. The bottom lid has a left end on the lower reference line and a right end at a distance d2 from the lower reference line. It is characterized in that it is connected to the front plate via a folding wire provided as described in the above, and further, the bottom lid has a glue margin for sticking.

By doing so, it is possible to easily assemble from one plate material, and it is not easy to place the lid or the bottom lid upright in the axial direction with the bottom surface as the bottom surface, that is, to provide a packaging container that easily falls down. Can be done.

(Solution 6)
in this case,
When the length from the upper reference line to the lower reference line is L and the width of the left side plate, back plate, right side plate, and front plate is m, L / (2 ・ m) * d2> (m / 2) or L / (2 ・ m) * d3> (m / 2)
It is preferable that the plate material is formed so as to be.

By doing so, it is possible to provide a packaging container plate material in which the plate material is assembled into a packaging container, and the vertical line passing through the center of gravity when the plate material is erected in the axial direction deviates from the contact surface on the bottom surface and collapses.

Since the packaging container according to the present invention is configured as described above, it has a structure that easily falls when it is erected in the axial direction. Therefore, storage and transportation in a horizontal state is promoted, and the stored rod-shaped articles can be safely and easily stored, transported and stored.
Further, the packaging container according to the present invention can be easily formed from a single plate material.

It is a perspective view of an example of the embodiment of the packaging container of this invention. It is explanatory drawing of the principle of the easiness of falling (easiness of falling) of this invention. It is explanatory drawing (front, diagonal, side surface) which shows typically the end part of the packaging container shown in FIG. It is a perspective view which shows the state which opened the lid of the canopy side end part of the packaging container shown in FIG. It is a perspective view which shows the state which the lid of the bottom side end of the packaging container shown in FIG. 1 is closed. It is a perspective view which shows the center of gravity and the contact surface of the packaging container shown in FIG. It is an enlarged perspective view of the end face of the packaging container shown in FIG. It is explanatory drawing which shows the relationship between the vertical line of the center of gravity of the packaging container shown in FIG. 6 and the contact surface. It is a development plan view (plan view of the plate material for a packaging container) of the packaging container of FIG. It is a partially enlarged view of FIG.

Hereinafter, an example of an embodiment of the packaging container and the plate material for the packaging container according to the present invention will be described with reference to FIGS. 1 to 10. For convenience, the side with the openable lid is referred to as the "top side" or "front side", and the side with the closed lid is referred to as the "bottom side" or "rear side".
FIG. 1 shows an external perspective view of the packaging container A of this example. In this example, as shown in FIG. 1, the front lid portion 4 is provided with a square tubular body portion 1 and closes the front opening 2b (see FIG. 4) and the rear opening (not shown) of the body portion 1, respectively. And a rear lid portion 5 is provided. The shapes of both ends of the end portion 2 in which the front side opening 2b is closed by the front side lid portion 4 and the end portions 3 in which the rear side opening is closed by the rear side lid portion 5 are made easy to collapse. This will be described below.

(principle)
FIG. 2 shows the basic principle that the packaging container of the present invention tends to fall down.
Generally, in order for an object placed on a horizontal plane to be stable and stationary, a vertical line passing through the center of gravity of the object is arranged so as to pass inside the bottom surface of the object (contact surface in contact with the horizontal plane). It is necessary to be done.
In FIGS. 2A and 2B, objects A1 and A2 having an outer shape of a substantially quadrangular prism and having end faces 4a whose ends are inclined with respect to the axis of the quadrangular prism are placed on a horizontal plane H, respectively. It is the figure which looked at the state which is placed from the side.
Since the bottom surfaces of the objects A1 and A2 are the end faces 4a of the objects, the objects A1 and A2 are inclined obliquely with respect to the horizontal plane H. That is, FIG. 2A shows a case where the position of the center of gravity of the object A1 is G1, and the vertical line VL lowered from the center of gravity G1 does not pass through the inside of the bottom surface thereof. On the other hand, FIG. 2B shows a case where the position of the center of gravity of the object A2 is G2, and the vertical line VL lowered from the center of gravity G2 passes through the inside of the bottom surface thereof.

When such a comparison is made, the object A2 in FIG. 2 (b) can be kept in a stationary state and cannot fall down (stable state) when placed quietly, but the object A1 in FIG. 2 (a) is placed quietly. It will be understood that even if it is struck, it cannot remain stationary and collapses (unstable state).
In this case, it is assumed that the end portion of the bottom surface is in contact with the entire surface, but a part of the surface or point contact may be used. However, since a stable surface cannot be formed unless the contact is made at three or more points, a stable state is formed when the contact is made at one point (in the case of point contact) or two points (in the case of line contact). It will be understood that what cannot be done (instability).
Therefore, as can be seen from these figures, the relationship between the position of the center of gravity of the object and the contact surface basically determines the static stability, that is, whether the object falls or does not fall when placed quietly. The inventor of the present invention also considered whether or not the center of gravity would come off in view of this point, and recognized that if the center of gravity were to come off, the packaging container would not only be easy to fall down but also inevitably fall down.

In addition, further consideration revealed that this is a static stable condition, and that it may fall more easily (become unstable). That is, I came to the conclusion that the dynamic unstable state should be considered before considering the static stable state.
Such rod-shaped articles are not limited to the static state (when gently placed) as described above. Even if the end face has a vertical cross section, if the support is removed in a slightly tilted state, the rotational moment of the center of gravity acts around the ground contact point, so it does not immediately become stable, a pendulum movement of the center of gravity occurs, and then damping. Then it stands still and becomes stable.
In this case, if the number of contact points is less than 3 at the moment when the support is lost, a third point is required to reach a stable state, and the player is exposed to an unstable state until the third point is obtained. .. Therefore, when the vertices of the end faces are placed on different vertical cross sections as in the present invention, the above-mentioned rotational moment is always generated when the vertices are placed vertically. Then, as shown in FIG. 2A, when the vertical line VL passing through the center of gravity G2 passes outside the contact surface 4a, the object A1 reaches an irreversible state, cannot be recovered, and falls and is in a stable state. I have no choice but to get. For this reason, not only is it stable in a static state, but also when a rotational moment is generated, the state in which it easily collapses is expanded.

Normally, when you try to place a rod-shaped object, you either put it vertically or lean against something. In the present invention, since the four vertices of the end face serving as the contact surface are included in different vertical cross sections, it is possible to create a dynamic unstable state in any case.
For example, when trying to place it vertically, there is a high possibility that it will come into contact at one point, and even if it is brought into contact at at most two points, it will still be in an unstable state. Therefore, if the vertical line from the center of gravity deviates from the end face, it will tip over, and even if it does not deviate, a rotational moment around the fulcrum will be generated. To do. That is, it becomes easy to fall down.
Although this consideration is about the packaging container itself, when the object to be packaged is stored in the container, the position of the total center of gravity becomes a problem. When the packaged object has a weight distribution structure that is almost symmetrical in the axial direction, almost the same effect can be obtained even when the packaged object is stored if the total center of gravity is at the same position. Will.

FIG. 3 shows a schematic view of the end face of the packaging container A of the present invention. FIG. 3A is a front view, FIG. 3C is a side view, and FIG. 3B is a view seen from an oblique position in the middle.
In this case, the end face is lowered by d2 and d3, respectively, from the position of the highest vertex V1 so as to be lowered at different heights in the directions of the vertices V2 and V3 (d2 and d3 are not equal), and the lowest vertex. With respect to V4, it is formed so as to be d3 lower than V2 and d2 lower than V3. Therefore, the lowest vertex V4 is d2 + d3 lower than the highest vertex. For example, d2 = 9 mm, d3 = 16 mm, and the side length m can be 75 mm.

It can be seen that the four vertices V1, V2, V3, and V4 determined in this way are on one plane. As shown in FIG. 3A, the sides facing each other (in the figure, the sides indicated by ○ and the sides indicated by Δ) have the same amount of change in height d3 and d2 from the facing vertices, respectively. Moreover, since they are on the opposite surfaces of the square cylinders, they are parallel to each other (not in the twisted position). The case where such an end face becomes a contact surface will be considered below.

FIG. 6 shows a case where the center of gravity g of the packaging container A of the present invention and the vertical line VL passing through the center of gravity g intersect with the horizontal plane xy as gp. The z-axis direction is the height direction (front-back direction) of the packaging container A.
FIG. 6A shows a case where the axis of the square cylinder of the square cylinder-shaped packaging container A intersects the horizontal plane xy perpendicularly. In this case, the case where the packaging container A is placed upright as vertically as possible is applicable. This packaging container A is modeled as a regular square pillar having a long side length L and a short side length m. The packaging container A has different heights of the vertices of the end faces, that is, the vertices are on different cross sections perpendicular to the longitudinal axis of the square tube. The center of gravity g is located at the center on the vertical cross section including the midpoint (L / 2) in the axial direction due to the symmetry of the shape of the packaging container A. The vertical line VL passing through this point intersects the point gp in the projection plane of the packaging container A on the xy plane.
FIG. 6B shows a case where the bottom surface of the packaging container A is a ground plane in contact with the horizontal plane xy. In this case, the case where the packaging container A is gently and quietly placed is hit. The bottom surface of the packaging container A is in surface contact with the horizontal plane xy, and the axis of the packaging container A is not perpendicular to the horizontal plane but has an inclination. The center of gravity g is on the cut surface including the midpoint (L / 2) in the axial direction due to the symmetry of the packaging container A, as in FIG. 6A. However, the vertical line VL passing through this point does not intersect in the ground plane of the packaging container A on the xy plane, but intersects with the point gp outside the ground plane.
As described above, in the case of FIG. 6A, since the contact with the horizontal plane xy at only one point, a rotational moment is generated around that point, which makes it unstable and easily falls. FIG. 6B shows a state in which the bottom surface is in contact with the horizontal plane xy. However, since the point gp intersects the horizontal plane xy on the outside of the bottom surface in contact with the horizontal plane xy, it is inevitable to fall down.

FIG. 7A is a diagram showing the relationship between the bottom surface side end surface of the packaging container A of the present invention and its projection surface. As shown in FIG. 3, the packaging container A of the present invention was cut from a regular tetrahedron having a side length of m diagonally, that is, so that the vertices V1, V2, V3, and V4 were at different heights. Assuming that it has an end face, the end face will be considered.
Each vertex on the bottom surface side is V1, V2, V3, V4 from the lower side. The vertical cross section (axial cross section of the packaging container A) S1 including the apex V1 is shown by the alternate long and short dash line. That is, S1 is a projection plane perpendicular to the axis of the end face formed by the vertices V1, V2, V3, and V4. This projection plane is a square with a piece length of m. Similarly, a vertical cross section including the other vertices V2, V3, and V4 can be considered, and as described below, the vertices V1, V2, V3, and V4 have different heights (positions in the axial direction). ), So they are on different vertical cross sections.
As shown in FIGS. 7A and 7B, each side of the end face is raised by d2 from the vertex V1 to the vertex V2, is raised by d3 from the vertex V1 to the vertex V3, and is raised from the vertex V2 to the vertex V4. d3, from vertex V3 to vertex V4, it is higher by d2. Therefore, the vertex V4 is higher than the vertex V1 by d2 + d3. As described with reference to FIG. 3, the vertices V1, V2, V3, and V4 are in the same plane, and the opposite sides are parallel. As for the sides V1-V2 of the end face, when viewed from V1, V2 is higher by d2, so the expected angle is θ2. Its length is m12, which is slightly longer than m, but when θ is smaller than m, m12 can be considered to be approximately equal to m. Similarly, as for the sides V1-V3 of the end face, since V3 is higher by d3 when viewed from V1, the expected angle is θ3. Its length is m13, which is slightly longer than m, but when θ3 is smaller than m, m13 can be considered to be approximately equal to m. Sides V3-V4 can be thought of as sides V1-V2, and sides V2-V4 can be thought of as sides V1-V3. In addition, m24 has the same length as m12, and m34 has the same length as m12.

The displacement Sk of the center of gravity G when having such an end face is considered, and whether or not the vertical line passing through the center of gravity after the displacement deviates from the bottom surface is considered.

First, the contribution of d2 and d3 when the length of one side of the cross section of the prism is m is considered in the polar coordinate system of (m, θ). Then
d2 / m ＝ tanθ2 (Equation 1)
d3 / m ＝ tanθ3 (Equation 2)
Is. If θ2 and θ3 << 1, it can be considered that θ2 = d2 / m and θ3 = d3 / m.
In this case, the end surface represented by the solid line in FIG. 7A is in contact with the horizontal plane xy, that is, the vertices V1, V2, V3, and V4 are in contact with the contact surface S1 (horizontal plane xy). If it moves, consider how the center of gravity Go of a square cylinder with a height L moves within the axial cross section, that is, the vertical cross section.

As shown in FIG. 8A, when the center of gravity Go of the square cylinder is upright so as to be perpendicular to the axis, the intersection point where the vertical line VL intersects the contact surface is Po. When the end face of the square cylinder is erected so as to be a contact surface, its center of gravity Go is the radius of gyration of L / 2, which is half the height of the regular quadrangular prism due to the contribution of d2, and the expected angle θ2 is in the x-axis direction. Only Sd2 moves, and similarly, due to the contribution of d3, only Sd3 moves in the y-axis direction by the angle θ3. Then, it can be considered that the center of gravity Go moves by the distance Sk in which these are superposed in a vector manner, and as a result, moves to the position of the center of gravity Gk. Then, in consideration of Equations 1 and 2, Sd2 and Sd3 become
Sd2 = L / 2 ・ tan θ2 = L / 2 ・ d2 / m
Sd3 = L / 2 ・ tan θ3 = L / 2 ・ d3 / m
Therefore, if the moving distance Sk of the center of gravity at this time is that the center of gravity moves within the vertical cross section,
Sk = (Sd2 ** 2 + Sd3 ** 2) ** (1/2) (Equation 3)
= {(L / 2 ・ d2 / m) ** 2+ (L / 2 ・ d3 / m) ** 2} ** (1/2) (Equation 4)
Sk can be obtained from m, L, d2, and d3. Note that ** represents a power.

As specific numerical values, some examples can be given for d2 and d3 when L = 556 mm and m = 75 mm. The calculation result of Sk obtained by Equation 4 is shown in Table 1 (unit: mm). At the same time, Table 1 shows the presence or absence of a fall from an upright state and the presence or absence of a fall from a state in which the bottom surface is in contact.
Further, an example in which this Sk is plotted as a point P on the xy plane is shown in FIG. 8 (b). On this xy plane, Sk (Sd2, Sd3) is shown with the movement Sd2 along the x-axis and the movement Sd3 along the y-axis as each element.

The intersection Po with the ground plane Ac in FIG. 8 (a) is the same as the origin O when considered in the xy plane of FIG. 8 (b). The shaded areas (± m / 2, ± m / 2) in the figure are the contact surface Ac, and the contact surface Ac is a square centered on the origin O having a side size of m. If the vertical line VL passing through the center of gravity Gk in this region has an intersection with the xy plane, it is considered to be statically stable, and if it has an intersection outside this region, the static stability condition is not satisfied and the vehicle falls. It will be. Expressed using the above-mentioned Sd2 and Sd3, the condition that the vertical line GL passing through the center of gravity of the packaging container A is deviated from the contact surface on the bottom surface when trying to stand in the axial direction is
Sd2 <-L / 2 · d2 / m or Sd2> L / 2 · d2 / m (expression 5)
Sd3 <-L / 2 · d3 / m or Sd3> L / 2 · d2 / m (expression 6)
Will be. For Sd2 or Sd3, either condition may be satisfied on the xy plane. Considering the range where d2> 0 and d3> 0, m> 0 and L> 0.
If Sd2 ＞ L / 2 ・ d2 / m or Sd3 ＞ L / 2 ・ d2 / m is established, the contact surface will be removed.
As shown in Table 1 and FIG. 8, in these samples, it can be seen that the positions of points P1 to 3 on the xy plane greatly deviate from the ground plane Ac at the intersection P1 of sample 1 (9-16-25 type). Also, at the intersection P2 of sample 2 (6-12-18 type), it can be seen that the contact patch Ac is off, though not as much as sample 1 (9-16-25 type). At the intersection P3 of sample 3 (9-9-18 type), it is inside the ground plane Ac.
Regarding these, when it was examined whether or not there was a fall in the state of being upright as much as possible and the state of being in contact with the bottom surface, samples 1 and 2 were found to have fallen in both states. Sample 3 fell from the upright state, but did not fall from the state where the bottom surface was in contact. In this way, it was found that in a dynamically unstable state, even if it is statically stable, it falls.
It is considered that the easiness of falling is greater as the distance from the contact surface Ac increases, but it can be seen that the positional relationship with the contact surface Ac changes depending on the position on the xy plane even if the Sk has the same size. As an example, FIG. 8B shows a line equidistant from the origin O of Sk having a size of approximately P2 (a quarter circle centered on the origin O), but the distance from the contact surface Ac. Depends on the values of Sd2 and Sd3.

(Plate)
FIG. 9 shows a paper plate material a for forming the packaging container A. FIG. 10 is an enlarged view of the vicinity of the end portion thereof. The plate material is not limited to paper, but is preferably made of paper. This is because it is easy to fold and attach.
This paper plate material a has a left side plate 14, a back plate 15, a right side plate 16, and a front plate 17 which are continuously provided in the width direction at equal intervals at each folding line b, and is located at one end in the width direction. A glue margin plate 19 for bonding is continuously provided on the edge of the face plate 17 via a folding line b. Then, by attaching the glue margin plate 19 to the edge of the left side plate 14 located at the other end in the width direction, the square tubular body portion 1 can be assembled.
In addition, the length direction of each board is called top, front, or heaven, and it may be bottom, back, or bottom, and the width direction is to the left (right) of the paper. Sometimes it is left (right).

(Top side end)
The left side plate 14 is provided with a folding line 14c1 at the front end edge in the length direction thereof, and a lid flap 14u is continuously provided via the folding line 14c1.
Further, the right side plate 16 is provided with a folding line 16c1 at the front end edge in the length direction thereof, and a lid flap 16u is continuously provided via the folding line 16c1.

The back plate 15 is provided with a folding line 15c1 at the front end edge in the length direction, and a lid 15u, which is a lid surface, is continuously provided via the folding line 15c1.
Further, the front plate 17 is provided with a folding line 17c1 at the front end edge 17i1 in the length direction, and a locking piece 17u is continuously provided via the folding line 17c1.

FIG. 4 shows a state in which the top surface side lid portion 4 of the top surface side end portion 2 assembled in this manner is opened. The top side lid 4 is on a plane cut surface including four vertices in the closed state.

As shown in the figure, the lid flaps 14u and 16u have a rectangular shape in a plan view, and one corner thereof is recessed in a rectangular shape. As a result, the end opening 2 of the body 1 can be substantially closed when folded inward, and the locking piece 17u can be inserted into the notch 15h of the lid 15u without interfering with the lid flaps 14u and 17u. it can.

The lid 15u is provided with a folding line 15a1 at a position where the substantially end opening 2 in the length direction can be closed, and the insertion 15a can be bent inward at this folding line.
Then, when the folding line 15c1 and the insertion 15a are bent inward, the locking piece 17u is bent at the folding line 17c1 and inserted into the notch 15e, the lid 15u is locked by the locking piece 17u and the closed state is maintained.

(Bottom side end)
A trapezoidal bottom lid 14f is continuously provided on the bottom lid edge in the length direction of the left side plate 14 via a folding line 14c2.
A trapezoidal bottom lid 15f is continuously provided on the bottom lid edge in the length direction of the back plate 15 via a folding line 15c2. A glue margin 15e is continuously provided on the edge of one side of the trapezoid of the bottom lid 15f via a folding line 15e1.

A trapezoidal bottom lid 16f is continuously provided on the bottom lid edge in the length direction of the right side plate 16 via a folding line 16c2.
A trapezoidal bottom lid 17f is continuously provided on the bottom lid edge in the length direction of the front plate 17 via a folding line 17c2. A glue margin 17e is continuously provided on the edge of one side of the trapezoid of the bottom lid 17f via a folding line 17e1.

In this example, the bottom surface side lid portion 5 has the above-described configuration, but instead, the bottom surface side lid portion 5 may have the same configuration as the top surface side lid portion 4. In this case, both ends in the length direction can be opened and closed (not shown).

(Positional relationship between polygonal line and vertex)
The positional relationship between the polygonal lines 14c1, 15c1, 16c1, 17c1 and the vertices V1 to V4 will be described.
FIG. 10 is an enlarged view of an end portion of the plate material a. FIG. 10A is a top surface side end portion, and FIG. 10B is a bottom surface side end portion. Since the same consideration can be made for the top surface side end portion 2 and the bottom surface side end portion 3, the same V1 to V4 are used for the vertices.
(Top side end)
As shown in FIGS. 9 and 10 (a), it is clear that the intersections of the polygonal lines 14c1, 15c1, 16c1, 17c1 and the polygonal line b are the vertices V1, V2, V3, and V4 at the top surface side end portion 4. .. Then, when the plate material is assembled, the plane formed by these vertices V1 to V4 becomes the end surface 2 of the top surface side end portion 4, and becomes the contact surface so that this end surface becomes the bottom surface.
Reference lines P12, P22, P32, DL including the vertices V1, V2, V3, and V4 of the top surface side end portion 4 of the plate material a and perpendicular to the front-rear direction of the plates 14, 15, 16, and 17. Think. These reference lines correspond to the vertical cross section including each apex in the packaging container A after assembling the plate material.
It is clear that the polygonal lines 14c1, 15c1, 16c1, and 17c1 are the sides connecting the vertices V1 to V4. Here, the polygonal line 14c1 is lowered by d2 from the apex V1 to the apex V2, the polygonal line 14c2 is lowered by d3 from the apex V1 to the apex V3, the polygonal line 14c3 is lowered by d3 from the apex V2 to the apex V4, and the polygonal line 14c4 is a d3. If the apex V3 is lowered by d2 from the apex V4, the end face on the top surface side of the square cylinder can be formed after assembly. That is, as described with reference to FIG. 3, the vertices V1, V2, V3, and V4 are on the same plane, and the opposite sides are parallel.

(Bottom side end)
As shown in FIGS. 9 and 10 (b), it is clear that at the bottom side end portion 3, the intersections of the polygonal lines 14c2, 15c2, 16c2, 17c2 and each polygonal line b are the vertices V1, V2, V3, V4. .. Then, when the plate material is assembled, the plane formed by these vertices V1 to V4 becomes the end face of the bottom surface side end portion 3, and this end face becomes the contact surface.
Consider reference lines P12, P22, P32, DL including the vertices V1, V2, V3, and V4 of the bottom surface side end portion of the plate material a and perpendicular to the front-rear direction of the plates 14, 15, 16, and 17. These reference lines correspond to the vertical cross section including each apex in the packaging container A after assembling the plate material, similar to the top surface side end portion.
It is clear that the polygonal lines 14c2, 15c2, 16c2, and 17c2 are the sides connecting the vertices V1 to V4. Here, the polygonal line 14c2 is lowered by d2 from the apex V1 to the apex V2, the polygonal line 14c2 is lowered by d3 from the apex V1 to the apex V3, the polygonal line 14c3 is lowered by d3 from the apex V2 to the apex V4, and the polygonal line 14c4 is a d3. If the apex V3 is lowered by d2 from the apex V4, the end face on the bottom surface side of the body portion 1 can be formed after assembly. That is, as described with reference to FIG. 3, the vertices V1, V2, V3, and V4 are on the same plane, and the opposite sides are parallel.

(Assembly procedure)
Hereinafter, a procedure for assembling the packaging container A using glue or a patch using the paper plate material a having the above-described configuration will be described.
First, the bottom lids 14f, 15f, 16f, and 17f are bent inward along the folding lines 14c2, 15c2, 16c2, and 17c2 of the plate material a shown in FIG. 10, and are overlapped with the plates 14, 15, 16, and 17, respectively. Subsequently, the folding lines 15e1 and 17e1 of the bottom lids 15 and 17 are bent outward and overlapped with the bottom lids 15f and 17f, respectively. In this way, the back plate 15 and the front plate 17 are in a triple-folded state. Further, the left side plate 14 and the right side plate 16 are doubly bent.
Next, in this state, glue is applied to the glue margins 15e and 17e, and then the front plate 17 and the left side plate 14 are bent inward along the folding lines b1 and b2 to form the glue margin 15e and the bottom plate 14f, and the glue margin 17e and the right side plate. 16f is pasted together. At this time, if glue is also applied to the glue margin plate portion 19, the folding line b1 is bent, then the folding line b2 is bent and the left side plate 14 is attached onto the glue margin plate portion 19, the body portion 1 is formed. They are pasted together in a flatly folded state.
Finally, after the bonding is completed, the folded plates 14, 15, 16 and 17 can be unfolded to form a square tubular body portion 1, and the bottom surface side end portions 5 are bottom plates 14f and 15f. , 16f, 17f can be used to assemble the packaging container A closed. It will be clear that for the packaging container A thus assembled, the vertices V1 to V4 are included in different vertical cross sections.
It should be noted that such a closing structure of the bottom lid portion 5 is conventionally known.

(Opening and closing the lid: storage and removal)
When the rod-shaped article is stored inside the packaging container A, it may be fed from the opening 2b of the lid portion 4 of the top plate side end portion 2. After that, the flaps 14u and 16u are bent inward, the lid 15u is further folded inward, and the locking piece 17u is inserted into the notch 15h to complete the storage.
Further, in order to take out the rod-shaped article from the storage container A, the locking piece 17u can be easily opened by hooking the locking piece 17u from the handle hole 15g of the top plate side end 2 with a finger and pulling it out to the front, and pulling out the insertion 15a. it can.
FIG. 1 shows an overall perspective view of the completed packaging container A. FIG. 4 shows the top surface side end portion 2 in the completed open state. FIG. 5 shows the completed bottom surface side end portion 3.

Although an example of the embodiment of the present invention has been described above with reference to the drawings, the packaging container according to the present invention is not limited to the illustrated example, and various designs are provided within the scope of the technical idea described in the claims. It goes without saying that it can be changed.

A: Packaging container a: Paper plate material (plate material for packaging container)
b, b1, b2: Folded line 1: Body part 2: End part, top side end part 2b: Front side opening 3: End part, bottom side end part 4: Lid part, top side lid part 5: Lid part, bottom surface Side lid 14: Left side plate 15: Back plate 16: Right side plate 17: Front plate 19: Glue allowance plate 14u, 16u: Lid flap 14c1, 15c1, 16c1, 17c1: Folded line 14c2, 15c2, 16c2, 17c2: Folded line 14f, 15f, 16f, 17f: Bottom lid 15a: Insertion 15e, 17e: Glue allowance 15e1, 17e1: Folded line 15g: Hand hole 15h, 17h: Notch 15u: Lid 17u: Locking piece Ac: Ground plane DL: Vertical cross section, Lower reference lines d2, d3 that constitute the vertical cross section: Height G from the upper and lower reference lines, g: Center of gravity Go: Position of the original center of gravity Gk: The angle θ2 and θ3 that the bottom surface is expected to move Position gp: Position where the vertical line of the center of gravity falls on the horizontal mounting surface H: Horizontal plane L: Height of the packaging container m: Length of one side of the body of the packaging container m12, m13, m24, m34: Length of the side O : Origin P: Reference points P1, P2, P3: Projection points of the center of gravity P11, P12, P21, P22, P31, P32: Vertical cross section, reference line 4a constituting the vertical cross section: Contact surface, end surface, bottom surface S1: Projection on the horizontal plane Sd2, Sd3: Movement distance of the center of gravity when the bottom surface moves at the expected angles θ2 and θ3, respectively Sk: Movement distance of Sd2 and Sd3 combined V1, V2, V3, V4: Apex VL: Vertical passing through the center of gravity Line UL: Vertical cross section, reference lines constituting the vertical cross section θ2, θ3: Expected angle when one side of the side moves by d2, d3

Claims (6)

A packaging container (A) having a square tubular body (1).
The four vertices (V1, V2, V3, V4) of one or both ends (2; 3) of the body (1) are coplanar, and each vertex is the body (1). A packaging container (A) formed so as to be on four different vertical cross sections (P11, P21, P31, UL; P12, P22, P32, DL). The packaging container (A) according to claim 1.
When the end portion (2; 3) is placed on the horizontal plane (H) so as to be the ground plane (Ac), the vertical straight line (VL) passing through the center of gravity (g) of the packaging container (A) is the ground plane. A packaging container (A) formed so as to pass through the outside of (Ac). The packaging container (A) according to claim 1 or 2, wherein the at least one end (2) is provided with a lid (4) that can be opened and closed. The packaging container (A) according to any one of claims 1 to 3, which is formed by bending and pasting a single plate material (a). A plate material (a) of a packaging container made of a single sheet of paper, wherein the plate material (a) has different distances d2 and d3.
It has a left side plate (14), a back plate (15), a right side plate (16), a front plate (17), and a glue margin plate (19) that are continuous in the width direction via a folding line (b, b, b1, b2). And
The left side plate (14) has a lid flap (14u) and a bottom lid (14f).
The lid flap (14u) has a left end (V3) at a distance d2 from the upper reference line (UL) and a right end (V1) at a distance d2 + d3 from the upper reference line (UL). It is connected to the left side plate (14) via a folding wire (14c1) provided.
The bottom lid (14f) is provided so that the left end (V3) is at a distance d2 from the lower reference line (DL) and the right end (V1) is at a distance from the lower reference line (DL). It is connected to the left side plate (14) via a folding wire (14c2),
The back plate (15) has a lid (15u) and a bottom lid (15f).
The lid (15u) is provided so that the left end (V1) is at a distance d2 + d3 from the upper reference line (UL) and the right end (V2) is at a distance d3 from the upper reference line (UL). It is connected to the back plate (15) via the folded wire (15c1).
Further, the lid (15u) has an insertion (15a), and the insertion is connected to the lid (15u) via a folding line (15a1) parallel to the folding line (15c1), and the folding line (15a1). Is provided with a notch (15h) for locking the lid (15u) in the middle portion thereof.
The bottom lid (15f) has a left end (V1) at a distance d2 + d3 from the lower reference line (DL) and a right end (V2) at a distance d3 from the lower reference line (DL). It is connected to the back plate (15) via a folding wire (15c2) provided and is connected to the back plate (15).
Further, the bottom lid (15f) has a glue margin (15e) for sticking.
The right side plate (16) has a lid flap (16u) and a bottom lid (16f).
The lid flap (16u) is provided so that its left end (V2) is at a distance d3 from the upper reference line (UL) and its right end (V4) is on the upper reference line (UL). It is connected to the right side plate (16) via a folding wire (16c1),
The bottom lid (16f) is a polygonal line provided so that the left end (V2) is at a distance d3 from the lower reference line (DL) and the right end (V4) is at the lower reference line (DL). It is connected to the right side plate (16) via (16c2) and
The front plate (17) has a locking piece (17u) and a bottom lid (17f).
The locking piece (17u) is provided so that its left end (V4) is on the upper reference line (UL) and its right end (V3) is at a distance d2 from the upper reference line (UL). From the edge (17i1), it is inserted into the insertion (15h) and is provided so as to project convexly in order to lock the lid (15u).
The bottom lid (17f) is a folding line provided so that its left end (V4) is on the lower reference line (DL) and its right end (V3) is at a distance d2 from the lower reference line (DL). While being connected to the front plate (17) via (17c2),
Further, the bottom lid (17f) is a plate material (a) having a glue margin (17e) for sticking. The plate material (a) is
Let L be the length from the upper reference line (UL) to the lower reference line (DL).
When the widths of the left side plate (14), the back plate (15), the right side plate (16), and the front plate (17) are m, any of Sd2 or Sd3
Sd2> L / 2 ・ d2 / m
Or Sd3> L / 2 ・ d2 / m
The plate material (a) according to claim 5, which is formed so as to be.

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