JP4407891B2 - Seat hinge - Google Patents

Description

  The present invention belongs to the technical field of sheets such as paperboard and corrugated cardboard, and particularly relates to a hinge portion of a sheet that is repeatedly bent.

Conventionally, paperboard and cardboard are used for various paper containers. There are various types of paperboard paper containers, but these are generally manufactured by printing, die cutting, and pasting processes. Among such paper containers, a container of a type provided with an opening / closing lid serving as a content outlet in a part of the upper plate is known (see Patent Document 1).
JP 2001-139025 A

  In this type of container, a lid plate is connected to the upper plate via a folding line, and the lid plate cuts the perforation and then lifts the folding curve upward as a hinge part, thereby removing the outlet. It is supposed to be formed. The folding curve of the cover plate may be formed of a push rule, but in order to make the cover plate easy to lift and hard to return, it is usually hinged by a so-called lead rule that is intermittently cut on the push rule. It constitutes a folding line as a part. Note that these creases and lead creases are formed by a die cutting process.

  As described above, when a part of a paperboard container is opened as a lid, a lead rule is often formed as a hinge portion of the lid. However, since the lead ruler is formed by intermittently forming a cut on the push ruler, a repulsive force is generated in the portion of the push ruler remaining when the lead ruler is bent, and the lid tends to return easily. Therefore, there is a problem in that it is not convenient to keep the lid open. Therefore, if the ratio of the perforation is increased in order to reduce the repulsive force, it becomes easy to cut when repeatedly bent.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a hinge portion of a sheet that has a small repulsive force that is generated when folded, and that is difficult to cut even when repeatedly folded. is there.

In order to achieve the above object, the hinge portion of the sheet according to the present invention is a hinge portion of the sheet that is repeatedly folded , and is provided with a plurality of cuts that are provided intermittently side by side to form a folding line of the sheet. At least one part, and each cut line is provided in the state in which the ends thereof are separated from each other in the line-up direction and alternately left and right in the line-up direction. The sheet is bent in such a manner that the structure destruction of the sheet gradually increases from the vicinity of the center of the imaginary line connecting the opposite ends toward the end of the cut.

  In the hinge part of the present invention, as illustrated later, there is no particular limitation on the shape of the cuts provided intermittently. That is, the shape of the cut line may be appropriately determined according to the material and thickness of the sheet, the degree of opening and closing, the durability of opening and closing, and the like. Further, it is often preferable from the viewpoint of design that the cuts are provided regularly, but it is not always necessary to provide regular cuts. Moreover, it is not necessary to provide all the cuts over the portion to be the hinge portion, and the cut may be provided in a part.

  The sheet on which the hinge portion of the present invention is provided is typically paperboard, but can also be applied to cardboard. In other words, there is no particular limitation as long as it is a material that can be torn by folding, such as paperboard or cardboard.

  When the hinge portion of the sheet of the present invention is folded, the portion near the edge of the cut has a large destruction of the sheet, but the portion near the center of the imaginary line connecting the opposite ends of the adjacent cuts has a small destruction of the sheet. Since the strength does not drop so much, the repulsive force at the time of bending becomes small, and it becomes difficult to be cut even if it is repeatedly bent. Therefore, it is suitable for a part that has many opening and closing operations and wants to keep the opened state.

  FIG. 1 is a plan view showing an example of a hinge portion of a seat according to the present invention, and FIG. 2 is a partially enlarged view of FIG. FIG. 1 shows a part of a region where a hinge is provided in the seat.

  As shown in FIG. 1 and FIG. 2, this hinge portion is composed of a plurality of linear cuts 1 provided in an intermittent manner so as to form a folding line of the sheet S. And each cut | interruption 1 is provided in the state which those ends 1a were spaced apart in the row direction X, and left-right alternately toward the row direction X. Although the same applies to the following examples, these cuts 1 are formed simultaneously with the die-cutting of the sheet S in the die-cutting step after printing.

  When the sheet S provided with the hinge portion is bent in the arrangement direction X of the cut lines 1, a folding line is generated in a direction orthogonal to the arrangement (bending direction Y). A tensile force acts. On the other hand, with this bending, the sheet S tends to be folded at an imaginary line i that connects opposite ends of the adjacent cuts 1. For this reason, a kind of twisting phenomenon occurs at the imaginary line i, and as a result, the tissue destruction of the sheet S gradually increases from the center A of the imaginary line i toward the end of the cut 1.

  As a result of the folding, the portion of the sheet S near the end of the cut 1 is greatly damaged, but the area A near the center of the imaginary line i connecting the opposing ends of the adjacent cuts 1 is Maintains a state in which tissue destruction is small and strength does not drop so much. Therefore, in this hinge part, the repulsive force at the time of bending becomes small, and it becomes difficult to cut even if it is repeatedly bent.

  FIG. 3 is a plan view showing another example of the hinge portion of the seat according to the present invention, and FIG. 4 is a partially enlarged view of FIG. Note that FIG. 3 shows a part of a region having a hinge portion in the seat.

  As shown in FIG. 3 and FIG. 4, the hinge portion is composed of a plurality of fold-like cuts 2 that are provided intermittently to form a fold line of the sheet S. And each cut | interruption 2 is provided in the state to which those ends 2a were spaced apart in the row direction X, and left-right alternately toward the row direction X. In addition, the adjacent cut lines 2 are formed in a U-shape so that the bending directions are the same.

  When the sheet S provided with the hinge portion is folded in the arrangement direction X of the cut lines 2, the folding is performed while causing a kind of twisting phenomenon as described above. However, in the case of this hinge part, the bending direction of the adjacent cut 2 is the same as the imaginary line i, and the tissue destruction at the end of the cut 2 is smooth. It is easier to bend than the hinge part.

  By being bent in this way, the portion near the end of the cut 2 is greatly damaged in the structure of the sheet S, but the vicinity A of the imaginary line i connecting the opposite ends of the adjacent cuts 2 is A of the sheet S. Maintains a state in which tissue destruction is small and strength does not drop so much. Therefore, also in this hinge part, the repulsive force at the time of bending becomes small, and it becomes difficult to cut even if it is repeatedly bent.

  FIG. 5 is a plan view showing still another example of the hinge portion of the seat according to the present invention, and FIG. 6 is a partially enlarged view of FIG. FIG. 5 shows a part of a region of the seat having a hinge portion.

  As shown in FIG. 5 and FIG. 6, this hinge portion is composed of a plurality of both-end key-like cuts 3 that are provided intermittently to form a folding line of the sheet S. And each cut | interruption 3 is provided in the state which those ends 3a were spaced apart in the row direction X, and left-right alternately toward the row direction X. Moreover, it is formed in a key shape at both ends so that the bending directions of the adjacent cuts 3 are the same.

  When the sheet S provided with the hinge portion is folded in the arrangement direction X of the cut lines 3, the folding is performed while causing a kind of twisting phenomenon as described above. However, also in the case of this hinge portion, the bending direction of the adjacent cut 3 is the same as the virtual line i, and the tissue breakage at the end of the cut 3 is smooth. It is easy to bend compared to the hinge part.

  By being bent in this way, the portion near the end of the cut 3 is greatly damaged in the structure of the sheet S, but the vicinity A of the imaginary line i connecting the opposite ends of the adjacent cut 3 is near the center A of the sheet S. Maintains a state in which tissue destruction is small and strength does not drop so much. Therefore, also in this hinge part, the repulsive force at the time of bending becomes small, and it becomes difficult to cut even if it is repeatedly bent.

  7 is a plan view showing still another example of the hinge portion of the seat according to the present invention, and FIG. 8 is a partially enlarged view of FIG. FIG. 7 shows a part of a region of the seat having a hinge portion.

  As shown in FIGS. 7 and 8, the hinge portion is composed of a plurality of curved cuts 4 that are provided intermittently side by side to form a folding line of the sheet S. And each cut | interruption 4 is provided in the state which those ends 4a were spaced apart in the row direction X, and left-right alternately toward the row direction X. And it is formed in the curve which the virtual extension line of the adjacent cut | interruption 4 connects.

  When the sheet S provided with the hinge portion is folded in the arrangement direction X of the cut lines 4, the folding is performed while causing a kind of twisting phenomenon as described above. However, also in this hinge portion, the extension direction of the adjacent cut 4 is the same as the imaginary line i, and the tissue destruction at the end of the cut 4 is smooth. It is easy to bend compared to the hinge part.

  By being bent in this way, the portion of the sheet S near the end of the cut 4 is greatly damaged in the structure of the sheet S, but the vicinity of the center of the imaginary line i connecting the opposite ends of the adjacent cuts 4 is Maintains a state in which tissue destruction is small and strength does not drop so much. Therefore, also in this hinge part, the repulsive force at the time of bending becomes small, and it becomes difficult to cut even if it is repeatedly bent.

  9 and 10 show a paperboard carton to which the hinge portion of the present invention is applied, and are perspective views showing a state before opening and after opening, respectively.

  The carton 10 shown in the figure is a horizontal type flat rectangular parallelepiped shape having a top panel 11, a bottom panel 12, a front panel 13, a back panel 14, and a pair of side panels 15, 16, and extends from the top panel 11 to the front panel 13. A lid panel 11a for opening and closing is defined. The lid panel 11 a is lifted upward via a rear folding line 21, and a knob portion 13 a is provided by a part of the front panel 13. Here, the fold line 21 has the same shape as the hinge portion described in FIGS. 7 and 8. That is, a fold line 21 is formed by a plurality of curved cut lines provided in an intermittent manner, and a portion other than the fold line is defined by a known perforation line 22. A U-shaped cut 23 is formed between the perforation line 22 and the folding line 21 in order to facilitate the folding of the lid panel 11a by the folding line 21.

  The operation for opening the carton 10 is as follows. In other words, the lid panel 11a is lifted through the fold line 21 while the perforation line 22 is broken by pulling the knob portion 13a of the front panel 13, and the cover panel 11a is opened as shown in FIG. Thus, since the repulsive force when folded at the folding line 21 is relatively small, the unsealed state is maintained if a little crease is attached to the hinge portion of the folding line 21.

  In order to close the opened carton 10 as shown in FIG. 10, the lid panel 11a is brought down to its original position, and the knob portion 13a is inserted into the arc-shaped cut 17a of the back panel 17 after the front panel 13 and fixed. To do. Thereby, the carton 10 can be easily closed. Even when the lid panel 11a is repeatedly opened and closed, the hinge portion is harder to cut than the conventional lead ruler.

It is a top view which shows an example of the hinge part of the sheet | seat which concerns on this invention. FIG. 2 is a partially enlarged view of FIG. 1. It is a top view which shows another example of the hinge part of the sheet | seat which concerns on this invention. FIG. 4 is a partially enlarged view of FIG. 3. It is a top view which shows another example of the hinge part of the sheet | seat which concerns on this invention. FIG. 6 is a partially enlarged view of FIG. 5. It is a top view which shows another example of the hinge part of the sheet | seat which concerns on this invention. FIG. 8 is a partially enlarged view of FIG. 7. It is a perspective view which shows the state made from the paperboard carton which applied the hinge part of this invention in the state before opening. FIG. 10 is a perspective view showing the carton of FIG. 9 in a state after opening.

1, 2, 3, 4 Cut 1a, 2a, 3a, 4a End 10 Carton 11 Top panel 11a Cover panel 12 Bottom panel 13 Front panel 13a Knob part 14 Back panel 15, 16 Side panel 17 Back panel 17a Arc-shaped cut 21 Folding line 22 Perforation line 23 U-shaped cut A Near center S Sheet X Alignment direction Y Bending direction i Virtual line

Claims (1)

A hinge portion of a sheet that is repeatedly bent, and includes at least part of a plurality of cuts that are intermittently arranged to form a folding line of the sheet, and each of the cuts has their ends spaced apart in the line-up direction. In the state, they are provided alternately left and right in the direction of alignment, and when the sheet is folded in the direction of alignment of the cuts, the sheet is directed from the vicinity of the center of the imaginary line that connects the opposing ends of adjacent cuts toward the ends of the cuts. The hinge portion of the sheet is bent so that the tissue destruction of the sheet gradually increases.

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