JP4962778B2 - Paper carton - Google Patents

Description

  The present invention belongs to the technical field of cartons made of paperboard, and more particularly relates to a paper carton that is suitably used for storing and selling confectionery, cosmetics, medical products, various accessories, and the like.

  Conventionally, as this type of paper carton, a top-open type paper carton is known in which the top panel is greatly opened to take out the contents. That is, the top panel is provided with two broken lines, and by pulling up the knob connected to the opening part surrounded by the broken line, the center part of the top panel is largely opened to take out the contents. It has become. However, since this type of paper carton cannot be kept upright unless the lid is supported by hand after opening, it is inconvenient if the contents are repeatedly removed while being opened. There are proposals that allow the lid to stand upright.

JP 2006-36350 A Japanese Patent Laid-Open No. 10-181739 JP 2003-128055 A

  The paper carton described in Patent Document 1 is a sealed paper carton with both ends being sealed ends, and a crease is provided on the top panel so that the unsealed portion can be folded, and the rear side of the fold. By forming a pair of left and right tongue pieces projecting to the top panel and providing a locking piece for locking each tongue piece on the top panel, the lid is held upright. If the degree of opening does not exceed 180 degrees, the tongue piece will get over the locking piece and will not be locked. Therefore, since it cannot be locked unless the lid is tilted to the rear side when opening and closing, there is a problem that the operation for keeping the lid open is troublesome.

  On the other hand, unlike the paper carton described in Patent Document 1, the paper cartons described in Patent Documents 2 and 3 can remain open when the opening degree of the lid exceeds 90 degrees. However, since the paper carton described in Patent Document 2 is a sack type, it is not suitable for a high-speed filling machine, and more paper is required than a seal type paper carton. Moreover, although the paper carton described in Patent Document 3 is a seal type, it requires a larger amount of paper than a normal seal type paper carton because it includes an upper plate with an opening and a cover plate that covers it. And

  The present invention has been made in view of such problems, and the object of the present invention is to perform an operation for opening the lid and standing up while having the same size as a normal seal-type paper carton. It is to provide a top open type paper carton.

In order to achieve the above object, the paper carton of the present invention is a top-open type in which an opening portion is provided at a position close to the back panel so as to undulate with a folding line provided on the top panel in a state parallel to the back panel. of a paper carton, and the tearing portion is formed by break line comprising a plurality of cutting edges contiguous, left and right end portions of the folding lines bulge outwardly from each end of the left and right breaking line forming the opening portion In the state where the curved cut line leading to the folds, the tongue pieces protruding rearward from the fold curve are defined on both sides of the fold curve, and the rear sides of both tongue pieces are connected behind the fold curve An auxiliary fold line that is substantially parallel to the fold line is provided.

  In the paper carton of the present invention, when the opening is opened at the breaking line with the folding line as a hinge, and the opening is pulled diagonally rearward while holding the opening, the portion behind the folding line on the top panel is an auxiliary folding line. By the way, the opening part extends upward by bending, and the tongue pieces on both sides of the folding curve are hooked and locked on the upper part of the remaining part of the top panel, so even if the opening degree of the lid is not 180 degrees, It can be locked in an open state simply by pulling diagonally to the rear side. This paper carton is a seal type that can be handled by a high-speed filling machine, but forms a curved cutting line that divides a tongue piece between the end of the breaking line and the end of the folding line, and assists in addition. Since it only needs to form a fold line, it can be made of a blank having the same size as that of a normal sealed paper carton.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view showing an example of a paper carton according to the present invention, and FIG. 2 is a development view of a blank for assembling the paper carton shown in FIG.

  The blank shown in FIG. 2 is formed by punching paperboard for paper containers. The flap panels 15 are successively provided. Folding flaps 16 are connected to the left and right sides of the front panel 11 via folding lines e and f, respectively, and side panels 17 on the bottom side are connected to the left and right sides of the bottom panel 12 via folding lines g and h, respectively. Folding flaps 18 are connected to the left and right sides of the back panel 13 via folding lines i and j, respectively, and the top panel 14 is connected to the left and right sides of the top panel 14 via folding lines k and l. 19 are continuously provided.

The flap panel 15 has a fingertip-sized hole 15a in the center near the tip, and extends in an L shape from both ends of the hole 15a so as to divide protrusions on both sides of the hole 15a. Two opening break lines L ₁ extending in a divergent shape are formed, and the top panel 14 has two break lines L ₁ that are continuous with the two break lines L ₁ of the flap panel 15. Breaking line L ₂ is provided.

The top panel 14 is provided with a folding line α that allows the unsealed portion to be folded in parallel with the back panel 13 so as to be parallel to the back panel 13 and inside the breaking line L ₂ . The two break lines L ₂ of the top panel 14 are provided from the flap panel 15 side to the back panel 13 side until reaching the folding line α, and are connected to the break line L ₂ and bulge outward. The tongue 20 that protrudes rearward from the folding line α is defined on both sides of the folding line α by a curved cut line β that reaches the end of the folding line α. An auxiliary folding line γ parallel to the folding line α is provided in a state where the rear sides of both tongue pieces 20 are connected.

The above breaking lines L ₁ and L ₂ are composed of a plurality of continuous cutting edges, and the two breaking lines L ₁ in the flap panel 15 are broken by applying an inward force at the time of opening at the end spread portion. Therefore, as shown in the drawing, the cutting edge having a shape in which the rear side is bent inward as viewed in the breaking progress direction is continuous, and the two break lines L _{2 on the} top panel 14 are also directed inward when opened. Therefore, the cutting edge having a shape in which the rear side is bent inward as viewed in the breaking progress direction is continuous.

  The front panel 11 is provided with slits 11a having a mountain shape and three radial cuts at positions corresponding to the protrusions on both sides of the hole 15a of the flap panel 15, and the protrusions on both sides of the hole 15a are formed on the front panel 11. It can be inserted and locked.

The blank in FIG. 2 is folded in a sack pasting state in which the back side of the flap panel 15 is pasted to the front side of the front panel 11. In this case, portions excluding the opening portion, i.e. glued than break line L ₁ in the outer area. In order to assemble a paper carton from this sack-attached blank, first, the folded blank is raised into a square tube shape, and then folded on the inner side at one end surface side, and then the bottom surface The side panel 17 on the side and the side panel 19 on the upper surface side are sequentially bent and bonded together. Next, after the contents are charged from the other end face side, the other end face side is similarly closed. In this way, the paper carton shown in FIG. 1 is produced.

In unsealing the paper carton, cutaway break line L ₁ of 2 muscle flap panel 15 by pulling plug the fingertip into the hole portion 15a of the flap panel 15, top panel by directly pulling from the top to the rear While the two broken lines L ₂ of 14 are continuously broken along the broken line L ₁ , the lid is opened while the broken opening portion is rotated at the subsequent folding line α. And it pulls diagonally back, holding the opening part of the flap panel 15 and the top panel 14. Then, the opening part bends at the auxiliary folding line γ and extends upward, and the tongue pieces 20 on both sides of the folding line α are hooked and locked by being above the remaining portion of the top panel 14, and FIG. As shown, the paper carton is formed with a large outlet at the top, and the lid is opened slightly tilted to the rear side. In FIG. 3, the contents are not shown.

  After opening in this way, the opened lid portion is lifted obliquely upward to release the locking of the tongue piece 20 and then tilted forward as it is. The lid can be closed by inserting and locking the slit 11a.

  The auxiliary folding line γ is slightly bent, so it may be an ordinary ruled line. Is preferred.

  Although the embodiments of the present invention have been described in detail above, the paper carton according to the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. It is natural to be.

  For example, the knob may be formed not only by the hole as described above but also by a knob.

  Moreover, the shape of the break line provided in the flap panel and the top panel is arbitrary, and the break line of the top panel is not limited to the case where it is provided in a straight line as described above. As long as a large opening can be formed, the shape is arbitrary.

  In addition, the shape of the tongue pieces provided on both sides of the folding line is also arbitrary, and when the lid is opened by forming an opening on the top panel, it is reversed so that it is reversed and locked to the remaining part of the top panel. It is only necessary to design.

It is a perspective view which shows an example of the paper carton concerning this invention. It is an expanded view of the blank which assembles the paper carton shown in FIG. It is a perspective view shown in the state which opened the paper carton of FIG.

Explanation of symbols

11 front panel 11a a slit 12 bottom panel 13 back panel 14 top panel 15 flap panel 15a pores 16 folding flap 17 side panels 18 folded flap 19 side panels 20 tongues L _1, L ₂ break line a~l polygonal line α folding line β cut line γ auxiliary folding line

Claims (1)

A top-open type paper carton that is provided with an opening portion that undulates with a folding line provided on the top panel as a hinge at a position close to the back panel, and comprising a plurality of continuous cutting edges Opening parts are formed by break lines, and curved cut lines that bulge outward from the ends of the left and right break lines that form the opening parts to the left and right ends of the folding line, on both sides of the folding line Tongue pieces projecting rearward from the folding line are defined, and further, an auxiliary folding line substantially parallel to the folding line is provided with the rear side of both tongue pieces behind the folding line. Characteristic paper carton.

Images