JP2014118208A - Assembling paper box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembling paper box which can be assembled easily just to combine the parts without application of adhesive.SOLUTION: An outer frame 1 is arranged in such a manner that plug pieces 11 and slots 12 of neighboring outer frame bodies 10 are inserted to each other. An inner frame 2 is arranged in such a manner that plug pieces 21 and slots 22 of neighboring inner frame bodies 20 are inserted to each other. A bending support piece 13 folded down horizontally from the outer frame body 10 is arranged to the inside surface of the outer frame body 10. A bending abutment piece 23 folded up horizontally inward from the inner frame body 20 is arranged to the lower end part of the inner frame body 20. A bottom plate 3 is fixed with the bottom plate 3 held between the support piece 13 and the abutment piece 23.

Description

  The present invention relates to an assembled paper box in which a side plate and a bottom plate are assembled to form a paper box, and relates to an assembled paper box that can be used as a high-grade container such as a heavy box.

  The present applicant has previously proposed a paper heavy box described in Patent Document 1. This paper heavy box uses an existing paper box as an inner box, and an outer frame that connects a pair of frame bodies bent in a plane L shape on the outer periphery of the inner box. By combining this outer frame with a ready-made inner box, it has become possible to stack and use paper boxes such as high-grade stickers like heavy boxes.

  The paper heavy box of Patent Document 1 uses an already formed assembly box or high-grade box as an inner box and is configured by combining the inner box with an outer frame. However, when this inner box is made an assembly type, it is difficult to increase the strength of the inner box formed by combining the bottom plate with the side plate.

  On the other hand, as means for strengthening a paper box constituted by combining a bottom plate with a side plate without using a ready-made box, for example, the paper boxes of Patent Document 2 and Patent Document 3 have been proposed.

  The paper box of Patent Document 2 is a paper box made of corrugated cardboard, and employs a structure in which a convex portion of the bottom plate is inserted and connected to a groove formed on the inner surface of the side plate. And the frame material used for a side plate is folded double and triple, and the intensity | strength of a paper box is improved.

  The paper box of Patent Document 3 relates to a stamping type decorative box, and uses a double side plate in which an inner frame is stacked on the inner side of an outer frame. Also in this cosmetic box, as in the paper box of Patent Document 2, the strength of the cosmetic box is increased by using the outer frame and the inner frame in a folded state.

Utility Model Registration No. 3177318 JP 2002-284139 A JP 2008-37457 A

  The paper heavy box described in Patent Document 1 uses a completed assembly box or a high-grade sticker box as an inner box, so that a large amount of storage space is required for transportation and storage of the inner box.

  On the other hand, the conventional assembling paper boxes as described in Patent Document 2 and Patent Document 3 all have a common problem. The first problem is the support strength of the bottom plate. That is, the bottom plate of Patent Document 2 has a configuration in which convex portions protruding from the four sides of the bottom plate are inserted into the grooves of the side plate. Therefore, when thick paper other than cardboard is used, the convex portion may fall off when the paper bottom plate is bent. is there. For this reason, a strong adhesive is required to fix the bottom plate to the side plate. To complete the paper box by assembling the bottom plate, it takes time to use this adhesive and time to dry.

  Further, the bottom plate described in Patent Document 3 employs a configuration in which the peripheral edge of the bottom plate is locked to the end portion of the outer frame folded back twice. For this reason, the area where the bottom plate is locked to the outer frame is limited to the paper thickness of the outer frame, and this bottom plate may be detached from the outer frame when the paper bottom plate is bent. Therefore, the bottom plate of Patent Document 3 also needs to be firmly bonded using an adhesive when assembling. As described above, the conventional assembled paper box has a common problem that it takes time to use the adhesive when assembling the bottom plate and it takes time to dry the adhesive.

  The second common problem is that the side plate is assembled and then the end of the side plate is bonded with an adhesive. The paper box of Patent Document 2 forms the side plate by folding the frame material in a double or triple manner, but it is necessary to bond the end portions of the side plate after folding. Further, in the paper box of Patent Document 3, the side plate is not formed unless the outer frame and the end of the inner frame folded back are bonded to each other. Thus, the conventional assembled paper box has a common problem that it is necessary to use an adhesive even when the side plate is assembled.

  Therefore, since the conventional assembling paper box needs to be assembled while using the adhesive when assembling the side plate and the bottom plate, there is a problem that it takes a lot of labor and time to complete one paper box. In addition, the strength of the completed paper box is determined by the strength of the adhesive, and when assembling the conventional paper box, the selection of the adhesive and the technique for applying it have become extremely important processes.

  Therefore, the present invention solves the above-mentioned problems, and can assemble a paper box simply by assembling parts without using an adhesive, shortening the time required for the assembly, and having excellent strength, The purpose of the present invention is to provide an assembled paper box that can be used as a high-grade container.

  In order to achieve the above object, the first means in the present invention is that a side plate is formed by overlapping the inner frame 2 on the inner side of the outer frame 1, and the bottom plate 3 is fixed to the lower end portion of the inner frame 2 on the inner side of the outer frame 1. In the assembled paper box, the outer frame 1 and the inner frame 2 are configured by connecting a pair of outer frame bodies 10 and a pair of inner frame bodies 20 which are bent in a plane L shape. The insertion pieces 11 and 21 and the insertion ports 12 and 22 are provided at both longitudinal ends of the body 10 and the inner frame body 20, and the insertion pieces 11 and 21 and the insertion ports 12 and 22 of the adjacent frame body are connected to each other. The outer frame 1 and the inner frame 2 are configured by inserting and bending at right angles to each other, and a bending support piece 13 that is folded horizontally from the outer frame body 10 is formed on the inner surface of the outer frame body 10 constituting the outer frame 1. A bent abutment that folds horizontally from the inner frame body 20 toward the inner side at the lower end of the inner frame body 20 constituting the inner frame 2 23 is provided, it is to fix the bottom plate 3 across the bottom plate 3 between these support pieces 13 and the contact piece 23.

  In the second means, the outer frame 10 is formed by folding a horizontally long strip of paperboard into two along the longitudinal direction so that the outer wall 10A and the inner wall 10B are superposed, and the lower end of the outer wall 10A is the inner wall 10B. A polymer piece 10C that is polymerized on the inner wall 10B is formed by extending to the side, and the bent support piece 13 that is bent and extended horizontally from the upper end of the polymer piece 10C and protrudes inside the outer frame body 10 is formed. It is.

  The outer frame 10 of the third means has a locking notch 14 formed in the inner wall 10B, and a locking projection 23A inserted and locked in the locking notch 14 is formed on the inner frame 20. It extends from the bent contact piece 23.

  In the fourth means, a locking projection 3 </ b> A that is inserted and locked in the locking notch 14 protrudes from a part of the peripheral edge of the bottom plate 3.

  5th means WHEREIN: The said inner frame 20 folds a horizontally long strip-shaped paperboard into two along a longitudinal direction, the outer wall 20A and the inner wall 20B are superposed | polymerized, and the lower end part of the outer wall 20A or the inner wall 20B In this way, the contact piece 23 is formed by bending and extending horizontally toward the inside of the inner frame body 20.

  In the sixth means, the outer frame body 10 and the inner frame body 20 are formed with the insertion ports 12 and 22 at the longitudinal ends of the outer walls 10A and 20A and the inner walls 10B and 20B, respectively. The introduction pieces 15 and 25 are formed in the outer walls 10A and 20A of the insertion ports 12 and 22, and the introduction pieces 15 and 25 are folded between the outer walls 10A and 20A and the inner walls 10B and 20B. The mouths 12 and 22 are configured to be reinforced.

  The seventh means is an assembly paper box in which a side plate is formed by overlapping an inner frame 2 on the inner side of the outer frame 1, and a bottom plate 3 is fixed to the lower end of the inner frame 2 on the inner side of the outer frame 1. The inner frame 2 is formed by connecting a pair of outer frame bodies 10 and a pair of inner frame bodies 20 bent in a plane L shape. The insertion pieces 11 and 21 and the insertion ports 12 and 22 are provided at both longitudinal ends, and the insertion pieces 11 and 21 and the insertion ports 12 and 22 of the adjacent frames are inserted into each other and bent at right angles, respectively. The frame 1 and the inner frame 2 are configured, and a bending support piece 13 that is horizontally folded from the outer frame body 10 is provided on the inner surface of the outer frame body 10 that configures the outer frame 1. At the lower end of the frame body 20, there is provided a bent contact piece 23 that folds horizontally from the inner frame body 20 toward the inside, and the outer frame body 10 is A laterally long strip of paperboard is folded in half along the longitudinal direction, the outer wall 10A and the inner wall 10B are polymerized, and the lower end of the outer wall 10A is extended to the inner wall 10B side to be polymerized on the inner wall 10B. 10C is formed, the bending support piece 13 that is bent and extended horizontally from the upper end portion of the overlapping piece 10C and protrudes to the inside of the outer frame body 10 is formed, and the locking notch 14 is formed on the inner wall 10B. A locking projection 23A inserted and locked in the locking notch 14 is formed extending from the bent contact piece 23 of the inner frame body 20, and the bottom plate 3 is placed on the contact piece 23. The inner frame body 20 is fitted into the outer frame body 10, and the locking protrusion 23 </ b> A of the inner frame body 20 is inserted into the locking notch 14 to insert the outer frame body 10 and the inner frame body. 20 is fixed.

  According to the first aspect of the present invention, the bending support piece 13 folded horizontally from the outer frame body 10 constituting the outer frame 1 and the bent contact piece 23 folded horizontally from the inner frame body 20 constituting the inner frame 2. By fixing the bottom plate 3 with the bottom plate 3 interposed therebetween, the bottom plate 3 can be firmly assembled without using an adhesive during assembly as in the conventional case. Moreover, since the outer frame 1 and the inner frame 2 are configured by connecting a pair of outer frame bodies 10 and a pair of inner frame bodies 20 that are bent in a plane L shape, the side plates may be assembled. There is no need to use an adhesive. As a result, the paper box can be easily assembled simply by assembling the parts without using an adhesive, and the time required for assembling the paper box of the present invention can be significantly shortened.

  As in claim 2, the lower end portion of the outer wall 10A is extended to the inner wall 10B side to form a polymer piece 10C that is superposed on the inner wall 10B, and the bending support piece 13 is bent and extended from the upper end portion of the polymer piece 10C. Therefore, the bending support piece 13 has a very strong support force against the load applied from above. In addition, the bending support piece 13 is brought into contact with the lower surface of the bottom plate 3 to exhibit a stable holding force, and unlike the conventional assembled paper box, there is no risk of falling even if the bottom plate 3 is bent, and has excellent strength. It is.

  As in claim 3, a locking notch 14 is formed in the inner wall 10 </ b> B of the outer frame body 10, and a locking projection 23 </ b> A that is inserted and locked into the locking notch 14 is bent and abutted on the inner frame body 20. By extending from the piece 23, the fixing force between the outer frame body 10 and the inner frame body 20 can be increased.

  According to the fourth aspect of the present invention, it is possible to further increase the fixing force of the bottom plate 3 by projecting the locking projection 3A that is inserted and locked into the locking notch 14 to a part of the peripheral edge of the bottom plate 3. Become.

  As in claim 5, this bent contact is formed by extending the lower end portion of the outer wall 20 </ b> A or the inner wall 20 </ b> B of the inner frame body 20 to form the contact piece 23 protruding inside the inner frame body 20. The upper surface around the bottom plate 3 can be reliably pressed by the piece 23.

  As described in claim 6, the outer frame body 10 and the inner frame body 20 are configured to form introduction pieces 15 and 25, respectively, and to reinforce the insertion ports 12 and 22 by the introduction pieces 15 and 25, respectively. Thus, the connection strength between the outer frame 1 and the inner frame 2 configured by connecting the pair of outer frame bodies 10 and the pair of inner frame bodies 20 bent in a plane L shape can be increased. As a result, it has excellent strength and can be used as a high-grade container such as a heavy box.

  According to claim 7, the inner frame body 20 in which the bottom plate 3 is placed on the contact piece 23 is fitted into the outer frame body 10, and the locking protrusion 23 </ b> A of the inner frame body 20 is By inserting the outer frame body 10 and the inner frame body 20 by inserting them into the notches 14 for locking, the bottom plate 3 can be firmly assembled without using an adhesive during assembly as in the prior art. . Moreover, since the outer frame 1 and the inner frame 2 are configured by connecting a pair of outer frame bodies 10 and a pair of inner frame bodies 20 that are bent in a plane L shape, the side plates may be assembled. There is no need to use an adhesive. As a result, the paper box can be easily assembled simply by assembling the parts without using an adhesive, and the time required for assembling the paper box of the present invention can be significantly shortened.

It is a disassembled perspective view which shows one Example of this invention. It is a perspective view which shows one Example of this invention. It is a sectional side view which shows one Example of this invention. It is an expanded view which shows one Example of the outer frame body of this invention. It is a disassembled perspective view which shows the state which combines the outer frame body of this invention. It is principal part sectional drawing which shows the state which combined the outer frame body of this invention. It is an expanded view which shows one Example of the inner frame of this invention. It is a disassembled perspective view which shows the state which combines the inner frame of this invention. It is a perspective view which shows the use condition of this invention. It is a perspective view which shows the other use condition of this invention. It is a disassembled perspective view which shows the other Example of this invention. It is principal part sectional drawing which shows the other Example of this invention.

  According to the present invention, it was possible to easily assemble a paper box simply by assembling parts without using an adhesive, shortening the time required for assembling, and achieving the original purpose such as having excellent strength.

  Examples of the present invention will be described below. The basic configuration of the present invention is a stamped paper-shaped assembly paper box in which a side plate constituted by an outer frame 1 and an inner frame 2 is combined with a bottom plate 3 (see FIG. 2).

  The outer frame 1 and the inner frame 2 are configured by connecting a pair of outer frame bodies 10 and a pair of inner frame bodies 20 bent in a plane L shape (see FIGS. 5 and 8). That is, the insertion pieces 11 and 21 and the insertion ports 12 and 22 are provided side by side at both longitudinal ends of the outer frame body 10 and the inner frame body 20.

  And the outer frame 1 and the inner frame 2 are each comprised by mutually inserting the insertion pieces 11 and 21 and the insertion ports 12 and 22 of an adjacent frame body, and bending at right angles (refer FIG. 1). That is, the side plate of the present invention is formed only by combining the substantially strip-shaped outer frame body 10 and the inner frame body 20. Specifically, when the adjacent insertion pieces 11 and 21 and the insertion openings 12 and 22 of each frame are inserted into each other and bent at right angles, the respective frames are connected, and the outer frame 10 and the inner frame 20 are connected to each other. It is formed (see FIGS. 5 and 8).

  The outer frame body 10 constituting the outer frame 1 is provided with a bent support piece 13 that is folded horizontally on the inner surface of the outer frame body 10 (see FIG. 3).

  FIG. 4 is a development view of the outer frame body 10 constituting the outer frame 1. The outer frame 10 is formed by folding a horizontally long strip-like paperboard into two along the longitudinal direction to form an outer wall 10A and an inner wall 10B. In the illustrated example, a notch 16 is provided between the inner side walls 10B to form a pair of left and right inner side walls 10B. Further, a pair of left and right outer walls 10A are extended from the lower end portion of the inner wall 10B via a bent edge a. The left and right outer walls 10A are in a continuous state. Therefore, when the inner side wall 10B is folded inward via the bent edge a, the outer frame body 10 and the inner side wall 10B are overlapped, and the insertion openings 12 are formed at the left and right ends of the outer frame body 10 (see FIG. 5).

  In FIG. 4, the insertion piece 11 protrudes from one longitudinal end of the outer wall 10 </ b> A, and the introduction piece 15 is formed at the other end. This introduction piece 15 reinforces the insertion port 12 by being folded between the outer wall 10A and the inner wall 10B (see FIG. 6). Furthermore, the insertion piece 11 is provided in the longitudinal one end part of the one side of the inner wall 10B (refer FIG. 4). The insertion piece 11 of the inner wall 10B is formed at a position opposite to the insertion piece 11 of the outer wall 10A.

  Further, a polymer piece 10C is formed on the lower end portion of the outer wall 10A via a bent edge b, and a bent support piece 13 is formed on the lower end portion of the polymer piece 10C via a folded portion c. By bonding the overlap piece 10C to the inner wall 10B, the outer wall 10A and the inner wall 10B are formed in a substantially cylindrical shape (see FIG. 6). Further, the bending support piece 13 is a member that supports the bottom portion of the bottom plate 3 by folding back from the folded portion c to the inside of the outer frame body 10 (see FIG. 3). The bent support piece 13 protrudes inside the outer frame body 10, and the bottom plate 3 is placed on the bent support piece 13. In the illustrated example, a locking projection 3A is provided at the center of each peripheral edge of the bottom plate 3, and a locking notch 14 for locking the locking projection 3A is formed on the inner wall 10B (see FIG. 1). .

  Like the outer frame body 10, the inner frame body 20 is formed by folding a horizontally long strip of paperboard into two along the longitudinal direction to form an outer wall 20A and an inner wall 20B (see FIGS. 7 and 8). . The configuration different from the outer frame body 10 is a configuration of a bending contact piece 23 instead of the bending support piece 13, and the configuration of the insertion piece 21 and the insertion port 22 is the insertion piece 11 and the insertion port 12 of the outer frame body 10. It is the same composition as. The illustrated bending contact piece 23 is folded horizontally inward from the lower end of the inner frame body 20, and the bottom plate 3 is interposed between the bending contact piece 23 and the bending support piece 13 of the outer frame body 10. The bottom plate 3 is fixed by sandwiching (see FIG. 3). Further, in the illustrated example, a locking projection 23 </ b> A is formed from the bent contact piece 23 of the inner frame body 20. The locking protrusion 23 </ b> A is a part that forms a locking notch 14 on the inner wall 10 </ b> B of the outer frame body 10 and is inserted and locked into the locking notch 14.

  FIG. 7 is a development view of the inner frame body 20 constituting the inner frame 2. The inner frame 20 is formed with a bent contact piece 23, an inner wall 20B, an outer wall 20A, and a reinforcing piece 24 in order from the top of the horizontally long strip-like paperboard. And the insertion piece 21 is protrudingly provided in one longitudinal end part of the outer side wall 20A, and the introduction piece 25 is formed in the other end part. The introduction piece 25 reinforces the insertion port 22 by being folded between the outer wall 20A and the side wall 20B (see FIG. 3). Furthermore, the insertion piece 21 is provided in the longitudinal end part of the inner wall 20B. The insertion piece 21 of the inner wall 20B is formed at a position opposite to the insertion piece 21 of the outer wall 20A.

  Although the bending contact piece 23 shown in FIG. 7 is bent and extended from the inner wall 20B, the bending contact piece 23 can also be formed from the outer wall 20A. In this case, the reinforcing piece 24 is extended from the inner wall 20B. In the illustrated example, the reinforcing piece 24 is extended from the outer wall 20A. By adhering the reinforcing piece 24 between the outer wall 20A and the inner wall 20B, the outer wall 10A and the inner wall 10B are formed in a substantially cylindrical shape, and the strength of the inner frame 20 is increased (see FIG. 3). And it is comprised so that the bending contact piece 23 may be folded up inside from the folding | turning part c (refer FIG. 1).

  As shown in FIG. 3, the bottom plate 3 includes the bottom plate 3 sandwiched between the bending contact piece 23 and the bending support piece 13 of the outer frame body 10, as shown in FIG. It is also possible to place the bottom plate 3 on the contact piece 23. The bottom plate 3 in the illustrated example is provided with a locking projection 3A on the peripheral edge. The locking projection 3A is inserted and locked in the locking notch 14, but there may be a case where the locking projection 3A does not need to be provided on the bottom plate 3, such as when the bottom plate 3 is thick.

  FIG. 9 shows an example of use in which a plurality of paper boxes of the present invention are stacked to form a heavy box and covered with a lid 4. FIG. 10 shows an example in which the inner container 5 is housed inside the paper box of the present invention and used as a high-quality lunch box. In addition, this invention is not restricted to the example of illustration, The application of this invention can also be changed arbitrarily. Furthermore, in each structure of the outer frame body 10 and the inner frame body 20 of the present invention, dimensions, materials, and the like of the respective constituent members can be arbitrarily changed.

  10 and 11 show another embodiment of the present invention. In this embodiment, the bottom plate 3 is placed on the contact piece 23 of the outer frame body 10. That is, a locking projection 23A that is inserted and locked in a locking notch 14 formed on the inner wall 10B is formed extending from the bent contact piece 23 of the inner frame body 20. Then, the inner frame body 20 is fitted into the outer frame body 10, and the locking protrusion 23 </ b> A of the inner frame body 20 is inserted into the locking notch 14 to fix the outer frame body 10 and the inner frame body 20. To do. Then, the bottom plate 3 is placed on the contact piece 23 of the outer frame body 10. In the illustrated example, a locking projection 3A is provided on a part of the peripheral edge of the bottom plate 3, and the locking projection 3A and the locking projection 23A of the inner frame 20 are overlapped with each other in the locking notch 14. Inserting. Further, the bottom plate 3 that does not form the locking protrusion 3A may be placed on the contact piece 23.

DESCRIPTION OF SYMBOLS 1 Outer frame 2 Inner frame 3 Bottom plate 3A Locking protrusion 4 Lid 5 Inner container 10 Outer frame body 10A Outer wall 10B Inner wall 10C Polymerization piece 11 Insertion piece 12 Insertion port 13 Bending support piece 14 Locking notch 20 Inner frame Body 21 Insertion piece 22 Insertion slot 23 Bending contact piece 23A Locking protrusion 24 Reinforcing piece 25 Introduction piece a Bending edge b Bending edge c Folding part

In order to achieve the above object, the first means in the present invention is that a side plate is formed by overlapping the inner frame 2 on the inner side of the outer frame 1, and the bottom plate 3 is fixed to the lower end portion of the inner frame 2 on the inner side of the outer frame 1. In the assembled paper box, the outer frame 1 and the inner frame 2 are configured by connecting a pair of outer frame bodies 10 and a pair of inner frame bodies 20 bent in a plane L shape, respectively.
The outer frame 10 is formed by folding a horizontally long strip of paperboard into two along the longitudinal direction to superpose the outer wall 10A and the inner wall 10B, and extending the lower end of the outer wall 10A toward the inner wall 10B. Forming a polymer piece 10C to be polymerized into 10B, forming a bent support piece 13 that is bent and extended horizontally from the upper end of the polymer piece 10C and protrudes to the inside of the outer frame body 10 ,
The inner frame 20 is formed by folding a horizontally long strip of paperboard into two along the longitudinal direction so that the outer wall 20A and the inner wall 20B are superposed, and the inner wall 20A is formed from the lower end of the outer wall 20A or the inner wall 20B. To form a contact piece 23 by bending and extending horizontally toward
Insertion pieces 11, 21 and insertion openings 12, 22 are provided at both longitudinal ends of the outer frame body 10 and the inner frame body 20, and the insertion pieces 11, 21 and insertion openings 12, 22 of adjacent frames are provided. Are inserted into each other and bent at right angles to form an outer frame 1 and an inner frame 2, respectively.
The inner frame 2 is fitted inside the outer frame 1, and the bottom plate 3 is fixed by sandwiching the bottom plate 3 between the bending support piece 13 and the bending contact piece 23.

In the outer frame 10 of the second means, a locking notch 14 is formed in the inner wall 10B, and a locking projection 23A that is inserted and locked in the locking notch 14 is formed on the inner frame 20. It extends from the bent contact piece 23.

In the third means, a locking projection 3 </ b> A that is inserted and locked in the locking notch 14 projects from a part of the peripheral edge of the bottom plate 3.

In the fourth means, the outer frame body 10 and the inner frame body 20 are formed with the insertion ports 12 and 22 at the longitudinal ends of the outer walls 10A and 20A and the inner walls 10B and 20B, respectively. The introduction pieces 15 and 25 are formed in the outer walls 10A and 20A of the insertion ports 12 and 22, and the introduction pieces 15 and 25 are folded between the outer walls 10A and 20A and the inner walls 10B and 20B. The mouths 12 and 22 are configured to be reinforced.

The fifth means is an assembly paper box in which a side plate is formed by overlapping the inner frame 2 on the inner side of the outer frame 1, and the bottom plate 3 is fixed to the lower end portion of the inner frame 2 on the inner side of the outer frame 1. And the inner frame 2 are configured by connecting a pair of outer frame bodies 10 and a pair of inner frame bodies 20 bent in a plane L shape,
The outer frame 10 is formed by folding a horizontally long strip of paperboard into two along the longitudinal direction to superpose the outer wall 10A and the inner wall 10B, and extending the lower end of the outer wall 10A toward the inner wall 10B. A polymer piece 10C that is superposed on 10B is formed, a bent support piece 13 that is bent and extended horizontally from the upper end of the polymer piece 10C and protrudes to the inside of the outer frame 10 is formed, and a locking notch 14 is formed on the inner wall 10B. Formed,
The inner frame 20 is formed by folding a horizontally long strip of paperboard into two along the longitudinal direction so that the outer wall 20A and the inner wall 20B are superposed, and the inner wall 20A is formed from the lower end of the outer wall 20A or the inner wall 20B. A bending contact piece 23 is formed by horizontally bending and extending toward the end, and a locking projection 23A is formed extending from the bending contact piece 23 to be inserted and locked into the locking notch 14 of the outer frame body 10 ,
Insertion pieces 11, 21 and insertion openings 12, 22 are provided at both longitudinal ends of the outer frame body 10 and the inner frame body 20, and the insertion pieces 11, 21 and insertion openings 12, 22 of adjacent frames are provided. Are inserted into each other and bent at right angles to form an outer frame 1 and an inner frame 2, respectively.
The inner frame 2 is fitted into the outer frame 1, and the locking projection 23 </ b> A of the inner frame body 20 is inserted into the locking notch 14 of the outer frame body 10 to insert the outer frame body 10 and the inner frame body 20. And the bottom plate 3 is placed on the contact piece 23.

Further , the lower end portion of the outer wall 10A is extended to the inner wall 10B side to form a polymer piece 10C that is superposed on the inner wall 10B, and the bending support piece 13 is bent and extended from the upper end portion of the polymer piece 10C. The bent support piece 13 has a very strong support force against the load applied from above. In addition, the bending support piece 13 is brought into contact with the lower surface of the bottom plate 3 to exhibit a stable holding force, and unlike the conventional assembled paper box, there is no risk of falling even if the bottom plate 3 is bent, and has excellent strength. It is.
Further, the lower end portion of the outer wall 20A or the inner wall 20B of the inner frame body 20 is extended to form the contact piece 23 that protrudes inside the inner frame body 20, so that the bent plate 23 can be used as a bottom plate. 3 is capable of reliably pressing the peripheral upper surface.

As in claim 2 , a locking notch 14 is formed in the inner wall 10 </ b> B of the outer frame body 10, and a locking protrusion 23 </ b> A that is inserted and locked in the locking notch 14 is bent and abutted on the inner frame body 20. By extending from the piece 23, the fixing force between the outer frame body 10 and the inner frame body 20 can be increased.

According to the third aspect of the present invention, it is possible to further increase the fixing force of the bottom plate 3 by projecting the locking projections 3A that are inserted and locked into the locking notches 14 into a part of the peripheral edge of the bottom plate 3. Become.

As described in claim 4, the outer frame body 10 and the inner frame body 20 are configured to form introduction pieces 15 and 25, respectively, and to reinforce the insertion ports 12 and 22 by the introduction pieces 15 and 25, respectively. Thus, the connection strength between the outer frame 1 and the inner frame 2 configured by connecting the pair of outer frame bodies 10 and the pair of inner frame bodies 20 bent in a plane L shape can be increased. As a result, it has excellent strength and can be used as a high-grade container such as a heavy box.

According to claim 5 , the inner frame body 20 on which the bottom plate 3 is placed on the contact piece 23 is fitted into the outer frame body 10, and the locking projection 23 </ b> A of the inner frame body 20 is By inserting the outer frame body 10 and the inner frame body 20 by inserting them into the notches 14 for locking, the bottom plate 3 can be firmly assembled without using an adhesive during assembly as in the prior art. . Moreover, since the outer frame 1 and the inner frame 2 are configured by connecting a pair of outer frame bodies 10 and a pair of inner frame bodies 20 that are bent in a plane L shape, the side plates may be assembled. There is no need to use an adhesive. As a result, the paper box can be easily assembled simply by assembling the parts without using an adhesive, and the time required for assembling the paper box of the present invention can be significantly shortened.

Claims (7)

In the assembled paper box in which the side plate is formed by overlapping the inner frame inside the outer frame, and the bottom plate is fixed to the lower end of the inner frame inside the outer frame,
The outer frame and the inner frame are configured by connecting a pair of outer frame bodies bent in a plane L shape and a pair of inner frame bodies, respectively, and both longitudinal end portions of the outer frame body and the inner frame body The insertion piece and the insertion port are provided side by side, the insertion piece and the insertion port of the adjacent frame body are inserted into each other and bent at right angles, and the outer frame and the inner frame are configured respectively.
A bending support piece that is folded horizontally from the outer frame body is provided on the inner side surface of the outer frame body that constitutes the outer frame, and is horizontally oriented inward from the inner frame body to the lower end portion of the inner frame body that constitutes the inner frame. An assembled paper box, wherein a bent contact piece is provided to be folded, and the bottom plate is fixed between the support piece and the contact piece.   The outer frame is a polymerization in which a laterally long strip of paperboard is folded in two along the longitudinal direction so that the outer wall and the inner wall are superposed, and the lower end of the outer wall is extended to the inner side wall to be superposed on the inner side wall. The assembled paper box according to claim 1, wherein a piece is formed, and the bent support piece is formed to be bent and extended horizontally from the upper end portion of the superposed piece and project to the inside of the outer frame.   The outer frame has a locking notch formed in the inner side wall, and a locking projection inserted and locked into the locking notch is extended from the bent contact piece of the inner frame. The assembled paper box according to 1 or 2.   The assembly paper box according to claim 1 or 3, wherein a locking projection to be inserted and locked in the locking notch is provided on a part of a peripheral edge of the bottom plate.   The inner frame is formed by folding a horizontally long strip of paperboard into two along the longitudinal direction so that the outer wall and the inner wall are superposed, and horizontally extending from the lower end of the outer wall or the inner wall toward the inside of the inner frame. The assembled paper box according to claim 1, wherein the contact piece is formed by bending and extending.   In the outer frame body and the inner frame body, the insertion port is formed at both longitudinal end portions of the outer wall and the inner wall, respectively, and an introduction piece is formed on the outer wall of one insertion port. The assembly paper box according to claim 1 or 2, wherein the insertion opening is reinforced between the outer wall and the inner wall to reinforce the insertion slot. In an assembled paper box in which a side plate is formed by overlapping an inner frame inside an outer frame, and a bottom plate is fixed to the lower end of the inner frame inside the outer frame, the outer frame and the inner frame are bent into a flat L-shape. A pair of outer frame bodies and a pair of inner frame bodies are connected to each other, and an insertion piece and an insertion port are provided at both longitudinal ends of the outer frame body and the inner frame body, adjacent to each other. The outer frame and the inner frame are formed by inserting the frame insert piece and the insertion slot into each other and bending them at right angles, and then fold horizontally from the outer frame body to the inner side surface of the outer frame body constituting the outer frame. A bent support piece is provided, and a bent contact piece that is folded horizontally inward from the inner frame body is provided at the lower end portion of the inner frame body that constitutes the inner frame. The paperboard is folded in half along the longitudinal direction, the outer wall and the inner wall are polymerized, the lower end of the outer wall is extended to the inner wall side, and the inner wall is polymerized Forming a bent support piece that is bent and extended horizontally from the upper end of the overlap piece and protrudes to the inside of the outer frame, and a notch for locking is formed on the inner wall. A locking projection for inserting and locking in the notch for extension is formed extending from the bent contact piece of the inner frame body,
The inner frame body is fitted inside the outer frame body, the locking projection of the inner frame body is inserted into a notch for locking, and the outer frame body and the inner frame body are fixed, An assembled paper box, wherein a bottom plate is placed on the contact piece of the outer frame.

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