JP5382505B2 - Packaging trunk - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging body frame that is inserted into a box to increase strength when a bag filled with powder or liquid is packed and transported / stored.

For example, as shown in FIG. 5 , when a bag S filled with a powder such as wheat flour or a liquid such as a detergent is transported and stored, a reinforcing body frame 51 may be provided in the box B. The body frame 51 is made of a corrugated cardboard sheet, and side plates 52 that form outer peripheral surfaces are connected to each other via a ruled line 53 in the vertical direction, and the side plate 52 is bent in the circumferential direction along the ruled line 53 to form a rectangular ring. It is what.

  By the way, since the powder and liquid packed in the bag S tend to spread so as to collapse downward, the lower part of the trunk frame 51 and the box B is subjected to a large internal pressure, and the outer side is associated with long-time transportation and storage. It may cause a swelling phenomenon.

As a countermeasure, as shown in FIG. 6 , as shown in FIG. 6 , as shown in FIG. 6 , an inverted trapezoidal side plate 62 having outer peripheral surfaces is continuously provided as a body frame 61 provided in the box B via a ruled line 63. There is described a technique in which 62 is bent in a circumferential direction along a ruled line 63 to have a tapered shape with a constriction, thereby preventing a swelling of the body due to internal pressure from the bag S.

JP 2000-53165 A

  However, as described above, in the case frame having a tapered shape, the effective capacity in the case frame is considerably reduced compared to the size of the box, and the space efficiency during transportation and storage is reduced. There's a problem.

  In view of the above, an object of the present invention is to prevent the swelling of the body while ensuring the effective capacity inside the bag.

In order to solve the above-mentioned problems, the present invention provides a side plate in which a side plate forming each outer peripheral surface is connected via a ruled line, the side plate is bent in a circumferential direction along the ruled line, and is mounted in a box as a rectangular ring. An oblique ruled line bifurcated from the vertical ruled line toward the lower and upper edges is put in at least one corner adjacent to each other to form a triangular part sandwiched between the ruled lines.

  In the packaging body frame according to the present invention, when a bag filled with powder or liquid is inserted and a large internal pressure is applied, the triangular part is pushed to the outside, and tension is applied to the side plate. Since a restoring force against the swelling is generated on the side plate, the trunk of the trunk frame and the box is prevented.

The figure which shows the blank of the trunk frame which concerns on 1st Embodiment of this invention The perspective view which shows the use condition same as the above The figure which shows the blank of the trunk frame which concerns on 2nd Embodiment of this invention The perspective view which shows an assembly state same as the above. The perspective view which shows the use condition of the conventional general trunk frame The perspective view which shows the use condition of the trunk frame of a lower diameter same as the above

  First, a first embodiment of the present invention will be described with reference to FIGS.

  The body frame 1 is formed by assembling a strip-shaped blank made of a corrugated cardboard sheet material as shown in FIG. 1, and transports and stores a bag S filled with powder such as flour as shown in FIG. In the meantime, it is installed in the box B.

  In the blank shown in FIG. 1, the side plate 2 forming each surface in the four directions of the outer periphery is connected through a vertical ruled line 3, and the passage piece 4 is connected to the outer edge of the side plate 2 at one end through the ruled line 3. It is installed. The three ridges adjacent to the side plate 2 are provided with diagonal ruled lines 5 that bifurcate from the ruled line 3 toward the lower and upper edges, and a triangular part 6 sandwiched between the ruled lines 5 is formed. Is formed.

  In order to assemble the body frame 1 from such a blank as shown in FIG. 2, the side plate 2 is folded in the circumferential direction along the ruled line 3, and the passage piece 4 is attached to the side plate 2 on the opposite side to form an angular ring shape. Form. At this time, the triangular portion 6 at the upper and lower corners of each ridge portion is inclined inward along the ruled line 5.

  In the case frame 1 as described above, when the bag S tries to spread so as to collapse downward while the bag S is inserted in the box B and a large internal pressure acts on the lower part, the lower triangular part 6 Is pushed outward, tension is applied to the lower part of the side plate 2, and a restoring force against the swelling is generated in the lower part of the side plate 2, so that the upper part of the body frame 1 and the lower part of the box B is prevented from being swollen. The

  In addition, an inner pressure smaller than the lower portion acts on the upper portion of the body frame 1, but the upper triangular portion 6 is pushed outward, so that a tension acts on the upper portion of the side plate 2, and the upper portion of the side plate 2 swells. A resisting restoring force is generated, and the body frame 1 and the upper part of the box B are prevented from being swollen.

Next, a description will be given of a second embodiment of the present invention in FIGS.

This trunk frame 1 is used by assembling the blank shown in FIG. 3 into the form shown in FIG. 4 , and the passage piece 4 is only in the middle part in the vertical direction as compared with the one in the first embodiment. The tip edge of the triangular portion 6 provided corresponding to the lower side and the upper side of the passage piece 4 is inscribed in the side plate 2 on the opposite side.

  In such a trunk frame 1, swelling of the trunk can be prevented with a good balance in the circumferential direction, and deformation in the packaged state can be prevented as much as possible.

  In each of the above embodiments, the ruled line 5 is a straight line having a constant inclination angle. However, the ruled line 5 may be a broken line whose inclination angle changes midway or may be curved.

1 Body frame 2 Side plate 3 Ruled line (vertical direction)
4 passage piece 5 ruled line (diagonal direction)
6 Triangular part

Claims (1)

The side plate (2) forming the outer peripheral surfaces is connected continuously via the ruled line (3), the side plate (2) is bent in the circumferential direction along the ruled line (3), and the body frame (1 ), At least one corner adjacent to the side plate (2) is provided with an oblique ruled line (5) bifurcated from the vertical ruled line (3) to the lower and upper edges. A packaging body frame characterized by forming a triangular part (6) sandwiched between (5).

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