JPS6144974Y2 - - Google Patents

Description

[Detailed explanation of the invention] The present invention is designed so that the bottom constituent members are partially glued together adjacent to each other, and the bottom constituent members can be expanded from the folded position with a single touch when forming the box to maintain the box shape. This relates to the bottom structure of a paper box that has the ability to expand.

In general, paper boxes having a bottom structure whose box body is formed by one-touch setup (assembly from a folded state to a box shape) are known to have various structures. However, when one bottom component is made large enough to cover the entire bottom surface, not only does the frictional engagement force during set-up become large, but the bottom component must be expanded beyond the low resistance of the frictional engagement. In order to do so, the operator must use force to spread the bottom component members relatively vigorously during setup. If this happens, the free end of the half-width bottom plate provided on the side will forcefully fit between the adhesive surface of the bottom plate provided on the end side and the full bottom plate, causing the adhesive surface to peel off and cause the bottom to fall out. The condition often occurs.

The present invention was developed in view of the above circumstances, and its purpose is to provide a paper box bottom structure that is easy to set up and whose adhesive surface does not peel off during set up. .

The present invention will be explained in more detail below with reference to the illustrated embodiments.The side surfaces 1 and 2, the end surface 3,
4 are alternately arranged laterally through folds 5, 6, and 7, and canopy constituent members 8, 9, 10, and 11 are arranged on each side surface and the upper part of the gable surface, respectively, through folds 12, 13, and 14. ，
They are connected via 15. A glue allowance 16 is provided on the side surface 1 located at the end.

Furthermore, the bottom component members 17, 18, 19, 20 have folds 21,
They are connected via 22, 23, and 24. Among these bottom constituent members, the one provided on one side 1 is a half-bottom plate 17 formed to a height less than half the width of the bottom of the end face 3, and the one provided on the other side 2 is a box. The entire bottom plate 18 has a width corresponding to the entire bottom surface when the body is formed. Connected to the end faces 3 and 4 are bottom plates 19 and 20 formed into approximately trapezoidal shapes, and one of the bottom plates 19 has a delta-shaped portion separated by a folded portion 19a that is bonded to the half-bottom plate 17. Part 19b
It is becoming.

A part of the bottom plate 20 provided on the end face 4 is further extended from the trapezoid to form a bonded portion 25, and a notch 26 and a fold portion 27 are provided at the extended base of the bonded portion to form the extended bonded portion. 25 is now glued to the entire bottom plate 18. In this case, the glued portion 28 is provided near the edge of the adhesive portion 25, and is adapted to be glued at a position higher than the height of the half-bottom plate 17. Note that 18a is a fold.

Each of the bottom component members 17 to 2 configured in this way
0 is folded inward and each adhesive part 19b, 25 is adhered to the corresponding half-bottom plate 17 and full-bottom plate 18, respectively, to form a bottom part, and the paper box is stored or transported in the folded state.

When using a paper box, it can be set up into a box shape from a folded state. By pressing both ends of the side surfaces toward the center in the folded state, the friction-engaging ends 19c of each bottom plate 19, 20,
20c abuts and engages with the flat surface of the other bottom plate, and the bottom component is positioned in an expanded manner as a whole, and by maintaining the expanded state, the box shape is maintained in the open state. be. During the set-up operation using this pressure, even if the set-up operation is performed with a relatively strong force against the frictional engagement described above, the notch 26 will not be formed at the bonded portion between the entire bottom plate 18 and the bottom plate 20. causes a twisting phenomenon, and unreasonable rigidity force is not applied to the joint surface with the entire bottom plate, which prevents it from peeling off. In other words, in order for the bottom component to expand into a flat state by overcoming the resistance in frictional engagement, there must be an adhesive part and a frictional engagement part, and in order to obtain sufficient frictional engagement, it is necessary to Unless linear rigidity is given to the ends of the plane, the unfolded flat state cannot be maintained. Therefore, by increasing the rigidity,
The unreasonable force of frictional engagement is directly applied to the adhesive part,
Acts in the direction of peeling off the adhesive part. Therefore, in order to perform setup work quickly and efficiently, this work should be done with a certain amount of force;
Because of the presence of the adhesive, the adhesive can be quickly set up without twisting in this area, causing the adhesive to peel off, and without losing the rigidity of the frictional engagement area.

As explained above, the bottom structure of the paper box according to the present invention includes a trapezoidal bottom plate in which the half-bottom plate and the full-bottom plate are connected, and a part of the bottom plate is glued to each of these, and the bottom plate is glued to the full-bottom plate. By providing an extended adhesive part on the bottom plate and providing a notch in the extended base, it is possible to absorb the twisting phenomenon that occurs between the bottom plate and the adhesive part due to the positional relationship between the bottom plate and the entire bottom plate during setup, This has the excellent effect of allowing the bottom component to be unfolded and expanded from a folded state into a box shape without losing the rigidity of the frictional engagement part that maintains a straight state, and without causing any action to peel off the adhesive part. It is played.

Furthermore, since the bottom component of one side is a half-bottom plate with a width less than half the width of the bottom of the end face, together with the extended adhesive part and the notch in the extension base, it cuts into the extended adhesive part during setup. It also has the excellent effect of stabilizing the adhesion state without any action.

[Brief explanation of drawings]

Fig. 1 is a developed plan view of a paper box having a bottom structure according to the present invention, Fig. 2 is a perspective view of the bottom side of the paper box during setup, Fig. 3 is a bottom view of the paper box after setup is completed, and Fig. 4 is a bottom view of the paper box. FIG. 3 is an enlarged cross-sectional view of the main parts during setup. 1, 2... side, 3, 4... wife side, 8-11...
...Canopy component, 16... Glue allowance, {17... Half bottom plate, 18... Full bottom plate, 19, 20... Bottom plate}
Bottom component, 19a, 27...Fold portion, 19
b, 25...Adhesive part, 19c, 20c...Friction engagement part, 26...Notch, 28...Glued part, 5-7,
12-15, 18a, 21-24...Folds.

Claims (1)

[Scope of utility model registration request] The sides and gables that make up the box body are connected alternately,
In the bottom structure of a paper box in which a bottom component is connected to the bottom of each side and the gable, the bottom component of one side is a half-bottom plate with a width less than half the width of the bottom of the gable,
The other bottom component is a bottom plate that spans the entire bottom surface, and the bottom component of the end surface is a substantially trapezoidal bottom plate, and each bottom plate is partially adhered to the adjacent half or full bottom plate to form the bottom cover. A part of the bottom plate that is to be adhered to the entire bottom plate is further extended to form an adhesive part for adhering to the entire bottom plate, and a notch for reducing rigidity is provided at the extended base of the adhesive part. The bottom structure of a paper box is characterized by: