JP4490174B2 - Packaging container joint structure - Google Patents

Description

  The present invention is a peripheral frame provided in a shape surrounding a bottom plate, the peripheral frame having two end portions, and comprising a band-shaped member that overlaps one end serving as an outer end portion on the other side. The present invention relates to a bonding structure for a packaging container having a bonding portion formed by overlapping an end portion with an inner peripheral frame.

  Conventionally, among packaging containers in which a bottom plate is provided on the inner side of a peripheral side frame, a container such as a folded box in which a peripheral side frame is provided in a form surrounding the bottom plate is formed by a belt-like member having a thin peripheral plate. For example, in the case of a rectangular container form, the portion corresponding to the corner position of the bottom plate is bent and arranged around the bottom plate, and both ends of the belt-like member are overlapped to form a joint portion Is disclosed (see Patent Document 1). The above-mentioned thin strip-shaped member is made of a material that does not destroy the natural environment, such as wood or Falkata, which is a leguminous plant, and both ends of the strip-shaped member are overlapped to form a joint. The belt-shaped member is configured as a peripheral frame.

As the structure of the above-mentioned joining portion, both ends are overlapped, and the overlapped portion is joined by a nail or a staple-like metal member, or is laminated by using a double-sided tape material or an adhesive. It was.
JP-A-11-300854

However, in the packaging container having the above-described configuration, when the overlapping portion is joined using a metal member, an inspection is performed using a metal detector or the like after the article is stored in the packaging container. In this case, the metal member used for the peripheral frame reacts with a metal detector or the like, and there is a problem that the product as a whole becomes a defective product even if the contents are good.
In addition, when bonding using a double-sided tape or an adhesive as the configuration of the joint, it is difficult to position the polymerization position, so there is a drawback that it is easily displaced, and for industrial production, the position is There is a disadvantage that a dedicated manufacturing apparatus is required to perform the alignment. In addition, when using an adhesive, it is necessary to cure the adhesive as it is until it dries. Therefore, a large storage space is required, and it takes time to complete, resulting in poor production efficiency. There was a drawback.

Furthermore, in the above configuration of the joint, foreign materials such as metals, double-sided tapes and adhesives are mixed in, so it becomes a heat-sensitive container, and it can be reused as a recycling material after using this packaging container. It could not be done, and it became an obstacle for recycling.
Moreover, since the adhesion part in the both ends of the peripheral side frame is not positioned, there is a problem that variations occur in the outer shape of the container.

  Therefore, the present invention can be joined without using a metal member, a double-sided tape, an adhesive, or the like as a configuration of the joining portion in a packaging container having a structure in which a peripheral frame is formed using a belt-like member, It is another object of the present invention to provide a bonding structure for packaging containers that does not require a special manufacturing apparatus, can be reliably aligned, and can be used as a recycling material.

To achieve the above object, the packaging container joining structure of the present invention is a peripheral frame provided in a shape surrounding the bottom plate, and the peripheral frame has two end portions and becomes an outer end portion. A packaging container comprising a band-shaped member that overlaps one end on the other side, and having a joint portion formed by superimposing the outer end portion on an inner peripheral frame, and among the joint portions, the bottom plate side of the outer end portion and becomes the inner surface, with a low step portion at the distal end of the peripheral side frame is provided, this step portion, the distal end side of the thickness direction formed wall of the peripheral side frame bottom plate direction circumferential side frame is formed on the inclined inclined portion, also, on the inner side of the outer end portion in the longitudinal direction of the peripheral side frame are recesses formed at a position apart in the distal direction opposite to the direction from the stepped portion, the recess in the thickness direction of the peripheral side frame it is recessed as evenly width or width is narrowed, and Further, the inner peripheral side frame constituting the other side of the joint is formed with a step and a concave portion that match the shape of the stepped portion and the concave portion of the outer end portion, and the concave portion includes the outer peripheral side. An inclined portion is formed in contact with the inclined portion of the stepped portion of the frame, and the convex portion is configured to engage with the concave portion of the outer end portion, and the outer end portion and the inner peripheral frame are overlapped on the outer side. The end portion and the inner peripheral side frame are configured to be engaged with each other.

  In the packaging container bonding structure having the above-described configuration, in the container in which the bonding portion is provided in a portion where the outer end portion of the peripheral frame and the inner peripheral frame are overlapped, the bonding portion is formed at the outer end portion. The stepped portion, the inclined portion, and the recessed portion are engaged or locked with the inclined portion and the protruding portion of the inner peripheral side frame, respectively. A bottom plate is disposed in the peripheral side frame, and in the engaged / locked state described above, the outer concave portion and the inner convex portion are engaged, and the inclined portion of the step portion at the outer end portion and the inner end portion are engaged. Since the slanted portion provided in the frame is in the locked state, the engaged / locked state is maintained in both the longitudinal direction and the thickness direction of the peripheral side frame, and the bonded portion is securely bonded. The state is maintained, and the outer peripheral side frame and the inner peripheral side frame are reliably integrated. Therefore, the both ends of the peripheral frame can be reliably joined simply by joining the outer stepped portion and the concave portion to the inner convex portion.

Since both ends of the peripheral frame are joined in a locked state as described above, the outer peripheral frame is not detached, and the bottom plate is provided on the inner side. Can be reliably maintained.
According to this packaging container joining structure, since the positions of the bonded portions at both end portions of the peripheral frame are reliably determined, it is possible to provide a non-defective product having no variation in the container outer shape. In this joining structure, since the joining part is simply joined by combining the outer end part and the inner end part, there is no need to use a metal member for the joining part of the peripheral side frame, and an abnormality is exhibited during inspection such as metal detection. The fear can be eliminated and only the contents can be inspected reliably.

In addition, since the above-mentioned joining structure does not use double-sided tape or a large amount of adhesive, positioning of the polymerization position is performed easily and reliably, so that a dedicated manufacturing apparatus is not required and a large amount of adhesive is also required. There is an effect that it is not necessary to secure time and place for curing.
Furthermore, since this joining structure does not use metals, double-sided tape, etc., it becomes a container that is resistant to heat, and has an excellent effect that it can be reused as a recycling material after the container is used. It is.

In addition, when joining the outer edge part and inner edge part of the said joining part, first, an outer edge part and an inner edge part are match | combined by matching an outer edge part and an inner edge part so that both inclination part may mutually be joined. The joining portion can be easily joined, and subsequently, the joining portion can be easily formed by superimposing the recessed portion and the projecting portion so as to engage each other.
In the packaging container joining structure according to claim 2 of the present invention, the inclined portion of the stepped portion formed in the joining portion is in the range of about 15 degrees to about 45 degrees with respect to the thickness direction, preferably about It is characterized by being inclined at 30 degrees.

According to the bonding structure of the packaging container having this configuration, by providing the inclined portion, when the inner end portion and the outer end portion are bonded, the step portions are joined together along the inclined portion. Can be reliably engaged, and after being engaged, the two inclined portions are in an engaged state, so that the engaged state can be reliably maintained.
When the inclination angle of the inclined portion is about 15 degrees or less or about 45 degrees or more, the concave and convex portions are caught at the time of joining the inner end portion and the outer end portion, and the fitting between the two is not smoothly performed.

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a main part of a packaging container showing an embodiment of the present invention, and FIG. 2 is an enlarged plan view of the main part.
The packaging container 1 includes a rectangular peripheral frame 10 and a bottom plate 20 provided in the peripheral frame 10. The peripheral frame 10 is configured so that the belt-like member can be bent at a right angle at a position corresponding to the corner of the bottom plate 20, and the length of the portion that is overlapped at both ends is added to the length of the four sides of the container. The length is formed. And the overlapping part of the both ends of the peripheral frame 10 is comprised as the junction part 11 as a junction structure.

The joint portion 11 is formed by the outer end portion 12 and the inner end portion 13, and is a plate that is approximately half the plate thickness t of the other portion from the front end side inside the outer end portion 12 at the opposing portion thereof. low it has been stepped portion 12a as the thickness t ₁ is formed. This stepped portion 12a is formed as an inclined portion 12b whose wall surface in the thickness direction is inclined toward the distal end on the bottom plate side, and in this embodiment, an inclination angle θ with respect to the reference line k in the thickness direction is given about 30 degrees. ing. The flat portion 12c continuous to the stepped portion 12a is formed to have a predetermined thickness n with a thickness t of a portion excluding the outer end portion 12 portion in the peripheral side frame 10, and the portion 12c. A concave portion 12d is formed in a portion continuing to.

  The inner end portion 13 of the joint portion 11 is formed in a form corresponding to the shape of the outer end portion 12, and the inclined portion 13b having a shape corresponding to the inclined portion 12b of the stepped portion 12a. And a recess 13c is formed as a form corresponding to the flat portion 12c. Further, as a portion corresponding to the concave portion 12d, the tip end side of the inner end portion 13 is formed as a convex portion 13d formed with the same plate thickness t as described above.

  Therefore, according to the joint portion 11, the recessed portion 12 d and the inner end portion of the outer end portion 12 with respect to the longitudinal direction of the peripheral frame 10 with the outer end portion 12 and the inner end portion 13 engaged. The 13 flat portions 13d are in a fitted state, and lateral displacement is prevented. Further, since the lateral displacement is prevented as described above with respect to the thickness direction of the peripheral frame 10, there is no displacement in the longitudinal direction of the peripheral frame 10, so that the outer end portion with respect to the thickness direction The 12 inclined portions 12b and the inclined portion 13b of the inner end portion 13 are in a locked state, and their movement in the separating direction (thickness direction) is reliably prevented. Thereby, an article is accommodated inside the peripheral side frame 10 (inside the container), and even if a force is applied from the inside to the outside of the container, the joint portion 11 of the peripheral side frame does not separate, and the container form is surely formed. Can be held. For the external force inward of the container, since the bottom plate 20 is arranged inside the joint portion 10, the inner end portion 13 does not move inward, and the fitting state of the joint portion 10 is reliably maintained. can do.

  The assembly process of the joint portion 11 of the packaging container 1 will be described. A slight gap (reference symbol s in FIG. 2) can be bent inwardly at the corner where the inner end portion 13 is close. 3), after positioning the outer end 12 at a predetermined position in a state where the inner end 13 is formed into an acute angle, the inner end 13 is moved as shown in FIG. By turning to the outer end portion 12 side (see symbol x), both inclined portions 12b and 13b can be engaged with each other so that their inclined surfaces are matched from the front end side. The convex portion 13d of the inner end portion 13 is engaged with the concave portion 12d. At this time, the engagement state can be reliably maintained by applying an adhesive to the tip of the convex portion 13d. Since the adhesive can be expected to have a sufficient adhesive effect only by being applied only to the tip of the convex portion 13d, the application work is simple and without using a large amount of adhesive as in the prior art. Since it becomes an engaged state and does not separate, the need for curing for drying the adhesive is eliminated. Thereafter, the bottom plate 20 is mounted in the assembled peripheral side frame 10.

  Moreover, as an assembling method when the bottom plate 20 is first arranged in the peripheral side frame 11, the long side intermediate portion of the peripheral side frame 11 provided on the outer end 12 side is slightly curved outward. As shown in FIG. 3 (b), the outer end 12 can be angled with respect to the inner end 13, and the tip end of the outer end 12 can be aligned with the inner end 13 first. In the state, the inclined portions 12b and 13b of the both sides are joined to each other from the front end side, and the curved shape is returned to the linear shape, so that the outer end portion 12 is moved in the direction indicated by symbol y in FIG. The convex portion 13d of the inner end portion 13 can be engaged with the concave portion 12d of the outer end portion 12. Therefore, even when the bottom plate 20 is first disposed in the circumferential frame 11, the circumferential frame 11 can be reliably disposed.

Note that the inclination angle θ of the inclined portions 12 b and 13 b is formed on an inclined surface of about 30 degrees with respect to the thickness direction k. As described above, this is a suitable angle for rotating the other end portions 12 and 13 along the inclined surface when the outer end portion 12 and the inner end portion 13 are overlapped. This is because the inclined surface can reliably maintain the engaged state. If this angle is in the range of about 15 degrees to about 45 degrees, a sufficient effect can be obtained.

Further, the length n from the inclined portions 12 b and 13 b to the concave portion 12 d or the convex portion 13 d is approximately five times the height m in the circumferential side frame longitudinal direction of the inclined portions 12 b and 13 b. Is set. This is because, as described above, when overlapping the outer edge portion 12 and the inner end portion 13, after is rotated to match the inclined portion 12 b, 13 b, engaging the recess 12d and the protrusion 13d This is to secure a distance for engaging the concave portion 12d or the convex portion 13d without hindrance. If this length is in the range of about 4 times to about 7 times, the engagement between the two can be performed without any trouble.

Their above, in the packaging container 1, since it is not necessary to use a metallic member at the junction 11 of the peripheral side frame 10, there is no fear that indicating abnormality during inspection metal detectors, etc., inspection metal detectors, etc. against any items Can be performed reliably.

In addition, it is not necessary to use a double-sided tape or a large amount of adhesive or the like for the joint portion 11, and even if a seam is not formed, positioning of the polymerization position can be easily and reliably performed. In addition to being unnecessary, there is an effect that an adhesive and the like are not used in large quantities, and it is unnecessary to secure time and place for curing.
Furthermore, since the structure of the joint 11 does not use metals, double-sided tape, etc., it becomes a heat-resistant container, and it can be reused as a recycling material after use of the container. It is what has.

Of the configuration of the joint portion 11, the shape of the convex portion 13d and the concave portion 12d, as shown in FIG. 4, the convex portion 13d as trapezoidal shape having an inclined surface of approximately inclination angle of 3 degrees, consistent with this It can also be set as the shape of the recessed part 12d to perform.
Also, the installation number of the convex portion 13d and the concave portion 12d, as shown in FIG. 4, it is also possible to provide a plurality not only one location.

Further, as shown in FIG. 5, the convex portion 13d, without the entire fitting portion trapezoid as shown in FIG. 4, only the distal end corners of the projecting portions 13d may be chamfered.
By forming the convex portion 13d as shown in FIGS. 4 and 5 , the convex portion 13d and the concave portion 12 can be fitted more smoothly, and this joining process can be performed without any trouble when mechanized. It becomes like this.

In the case where a water-based bond is used as an adhesive, and wood or a Falkata material is used as the material of the peripheral frame 10, the material absorbs moisture contained in the water-based bond, so that the peripheral frame 10 is in the longitudinal direction. It expands to an increased degree of adhesion and can be in a temporarily bonded state until the bonding is completed.
In each said embodiment, although the junction part 11 was shown in the example of the outer side edge part 12 and the inner side edge part 13, since the inner side edge part 13 is not limited to an edge part position, an inner peripheral side frame is used. The present invention can be implemented as long as it constitutes a part.

It is a perspective view of the principal part of the joining structure of the packaging container which shows embodiment of this invention. It is an enlarged plan view of a junction part. (A) (b) is a top view which shows the time of an assembly of a junction part, respectively. It is a plain view which shows the structure of another junction part. It is a top view which shows the structure of another junction part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Packaging container 10 Peripheral side frame 11 Joining part 12 Outer edge part 13 Inner edge part 12b, 13b Inclined part 12d Concavity 13d Convex part 20 Bottom plate

Claims (2)

A peripheral frame provided in a shape surrounding the bottom plate, the peripheral frame having two end portions and a band-shaped member in which one end serving as an outer end portion is overlapped on the other side, and the outer end portion is disposed on the inner side. in packaging container having a joint formed by overlapping the peripheral side frame, of the joint, on the inner surface to be the bottom plate side of the outer end portion, a lower step portion provided at the tip of the peripheral side frame In addition, a wall surface formed in the thickness direction of the peripheral side frame is formed in the stepped portion in an inclined portion in which the bottom plate direction is inclined toward the distal end side of the peripheral side frame, and on the inner side of the outer end portion . Has a recess formed in the longitudinal direction of the peripheral frame away from the stepped portion in the direction opposite to the tip direction, and the recess is recessed so that the uniform width or the width is narrowed in the thickness direction of the peripheral frame. further, the inner peripheral side frame constituting the other side of the joint, the outer The step part of the part and the concave part and the convex part that match the shape of the concave part are formed, and the concave part is formed with an inclined part in contact with the inclined part of the step part of the outer peripheral side frame, and the convex part is formed on the outer end. The outer end portion and the inner peripheral side frame are in an engaged state in a state where the outer end portion and the inner peripheral side frame are overlapped with each other. Characteristic packaging structure for packaging containers.   The packaging part according to claim 1, wherein the inclined part of the step part formed in the joint part is formed to be inclined in the range of about 15 degrees to about 45 degrees, preferably about 30 degrees with respect to the thickness direction. Container joint structure.

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