JP4535481B2 - Shock absorber - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shock absorber, and more particularly to a shock absorber made of continuous corrugated cardboard and having a plurality of bent portions that are substantially parallel to each other and alternately bent in opposite directions at the bent portions.
[0002]
[Prior art]
For example, in Japanese Patent Laid-Open No. 2000-128249, a plurality of cutting lines are formed substantially parallel to each other in a direction perpendicular to the direction in which the corrugated cardboard extends, and a plurality of connecting portions are intermittently connected to these cutting lines. Proposing a cushioning body for packaging, in which a plurality of cardboards can be folded together, and alternately folded into a mountain and a valley at the cutting line, and the cardboard plates are joined together. Has been.
[0003]
Such a shock absorber can be assembled simply by bending a single cardboard, and can be automatically assembled by a machine, so that significant labor saving and cost reduction can be achieved. In addition, since a plurality of corrugated board plates are alternately bent and joined in the opposite direction, the cushioning body is constituted only by the corrugated board, and the cushioning body can be formed without using a metal such as a stop wire. Assembled. Thus, the packaging buffer is recyclable.
[0004]
[Problems to be solved by the invention]
A drawback of such a conventional buffer is the structure of the connecting portion that is indirectly formed so as to cross the cutting line. That is, there is a problem that the end of the cut forming the connecting portion is easily broken and the connecting portion is not deformed neatly so as to be bent in a U shape when alternately bent in the opposite direction at the cutting line. In addition, when the portions separated by the cutting line are glued to each other, there is a problem that the glue falls down through the gap between the cutting lines and soils the machine.
[0005]
The present invention has been made in view of such problems, and solves the structural problem of the connecting portion, or when the plate-like portions are connected to each other by glue, the glue flows down and the machine is It is an object of the present invention to provide a shock absorber that is not contaminated.
[0006]
[Means for Solving the Problems]
The main invention of the present application is a shock absorber that is composed of continuous corrugated cardboard, has a plurality of bent portions that are substantially parallel to each other, and alternately bends in opposite directions at the bent portions.
At least a part of the bent portion is constituted by a cutting line, a connecting portion is formed by a pair of cuts intersecting the cutting line, and the portions on both sides of the cutting line are connected by the connecting portion so as to be bent,
In addition, the present invention relates to a shock absorber characterized in that the end of the notch forming the connecting portion is formed of an oblique notch that increases the width of the connecting portion.
[0007]
Here, a discontinuous perforated cut extending in the width direction of the connecting portion may be formed at an intermediate position of the connecting portion. In addition, a curved cut extending in the width direction of the connecting portion may be formed in the vicinity of the terminal end of the connecting portion. Moreover, the said connection part may be crushed flat.
[0008]
Another invention of the present application is a shock absorber configured of continuous corrugated cardboard and having a plurality of bent portions that are substantially parallel to each other, and alternately bent in opposite directions at the bent portions.
The bending portion is composed of a cutting line that leaves a liner on the surface, and a slit having a predetermined width, and the cutting line and the slit are alternately formed,
In addition, a connecting portion is formed by a pair of cuts intersecting the slit, and the portions on both sides of the slit are connected by the connecting portion so as to be foldable,
In addition, the end of the cut forming the connecting portion is composed of an oblique cut such that the width of the connecting portion is widened,
The present invention relates to a shock absorber characterized in that the cutting line is valley-folded with the liner inside.
[0009]
Here, a discontinuous perforation in the width direction of the connecting portion may be formed at an intermediate position of the connecting portion. In addition, a curved cut extending in the width direction of the connecting portion may be formed in the vicinity of the terminal end of the connecting portion.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to the illustrated embodiments. 1 to 4 show a shock absorber according to a first embodiment of the present invention, and this shock absorber is composed of a single continuous cardboard. FIG. 1 shows a state in which such a corrugated cardboard is unfolded. In the corrugated cardboard direction, half-cut fold lines 11 and cutting lines 12 are alternately formed in parallel at predetermined intervals. Yes. In particular, a pair of cuts 13 are intermittently formed so as to cross the cutting line 12, and a connection portion 14 is formed between the cuts 13, thereby connecting both sides of the cutting line 12.
[0012]
As shown in FIG. 1, the corrugated cardboard has 12 plate-like portions 19, 20, 21, 22, 23, 24, 25, 26, by 6 half-cut fold lines 11 and 5 cut lines 12. 27, 28, 29, and 30 are formed so as to be sequentially connected. These plate-like portions 19 to 30 have the same width in the direction of the step, that is, the vertical direction in FIG. 1, so that the buffer bodies can be assembled by folding them alternately.
[0013]
A slit-like opening 33 is formed in the plate-like portion 23 so as to be close to the cutting line 12, and a horizontally long opening 34 is formed in the plate-like portion 24 so as to face the half-cut folding line 11. Further, a horizontally long opening 35 is formed so as to straddle both sides of the half-cut fold line 11 that crosses between the plate-like portions 25 and 26. Further, a horizontally elongated opening 36 is formed so as to cross the half-folded fold line 11 between the plate-like portions 27 and 28. A horizontally long opening 37 is formed so as to cross the half-folded fold line 11 that crosses the plate-like portions 29 and 30. Here, the horizontally long openings 35, 36, and 37 have the same size.
[0014]
A receiving plate 42 is formed on the lower end side of the horizontally long opening 37 via a cutting line 39. The cutting line 39 connects the receiving plate 42 so that the receiving plate 42 can be bent by a connecting portion 41 constituted by the cuts 40 on both sides. A locking piece 46 is connected to the upper end of the receiving plate 42 via a cutting line 44. The cutting line 44 interposed between the locking piece 46 and the receiving plate 42 is connected to each other by a plurality of connecting portions 45, whereby the locking piece 46 is connected to the receiving plate 42 so that it can be bent. Will be.
[0015]
2 and 3 show the operation of assembling the shock absorber by folding such cardboard. The half-folded fold line 11 and the cutting line 12 of the cardboard shown in FIG. 1 are alternately bent in opposite directions. The half-cut fold line 11 is connected by a liner on one surface thereof, and is bent so that the liner is inside. On the other hand, the cutting line 12 is intermittently connected by the connecting portion 14. Therefore, the connecting portion 14 is bent at the cutting line 12. In addition, it is possible to couple | bond these plate-shaped parts 19-30 mutually here by apply | coating a paste and an adhesive agent as needed to the plate-shaped parts 19-30.
[0016]
As shown in FIG. 3, the corrugated cardboard folded in this way is formed with a concave portion facing from the one side surface to the upper surface by the horizontally long openings 34, 35, 36, and 37. Accordingly, the receiving plate 42 connected to the horizontally long opening 37 is bent by the connecting portion 41 of the cutting line 39. Then, the locking piece 46 on the front end side of the receiving plate 42 is bent in the reverse direction by the connecting portion 45 of the cutting line 44, and the locking piece 46 is inserted into the slit-like opening 33 of the plate-like portion 23, The receiving plate 42 is fixed so as to cover the upper surface of the recess.
[0017]
Such a buffer can receive the corner portion of the article to be buffered by the recess whose upper surface is covered by the receiving plate 42. The article can be protected from impact by the cushioning effect of the cushion formed by bending the cardboard.
[0018]
A major feature of such a cardboard cushion is the structure of the connecting portion 14 formed across the cutting line 12 as shown in FIG. That is, as shown in FIG. 4A, the cuts 13 that divide the portions on both sides of the connecting portion 14 from the cutting line 12 have diagonal cuts 50 at both ends in the length direction and at the root side. By such an oblique cut 50, the width of the base side portion of the connecting portion 14 is wider than the width of the intermediate portion. Therefore, by forming such an oblique cut 50, the end portion of the cut 13 on the base side of the connecting portion 14 is hardly broken.
[0019]
As shown in FIG. 4A, a pair of perforated cuts 51 are formed at an intermediate position of the connecting portion 14. By forming such a cut 51, the connecting portion 14 is prevented from being deformed into a V shape as shown by a chain line, and is deformed into a U shape as shown by a solid line. That is, the connecting portion 14 is deformed with a gentle curvature by the pair of perforated cuts 51.
[0020]
FIG. 4B shows a configuration of another connecting portion 14. The connecting portion 14 is configured such that the ends of the cuts 13 on both sides thereof are formed by oblique cuts 50, and an arcuate cut 52 is formed between the oblique cuts 50 in the vicinity of the base side of the connection portion 14. I have to. By forming such a cut 52, when a tension is applied in the length direction of the connecting portion 14, this tension can be absorbed by the opening deformation of the arc-shaped cut 52. Therefore, it is possible to prevent the connecting portion 14 from being applied with a tensile force in the length direction and to prevent the connecting portion 14 from being cut.
[0021]
FIG. 4C shows still another configuration of the connecting portion 14. Here, the end side portion of the notch 13 of the connecting portion 14 is formed from an oblique perforated notch 53. Such oblique perforated cuts 53 prevent breakage of the cuts 13 on both sides of the connecting portion 14 in particular. In addition, since the arc-shaped cut 52 is formed on the base side of the connecting portion 14, when the longitudinal tension is applied to the connecting portion 14, this tension is absorbed by the opening of the arc-shaped cut 52. It becomes possible to do.
[0022]
Further, when the cardboard as shown in FIG. 1 is punched, the connecting portion 14 formed so as to cross the cutting line 12 may be flattened. That is, the middle core folded in an intermediate zigzag may be crushed so that the liners on both sides are in close contact with the crushed middle core.
[0023]
According to the structure in which the connecting portion 14 is flattened in advance, the connecting portion 14 may protrude outward from the end surface constituted by the cutting line 12 when the buffer body is assembled as shown in FIG. This prevents the connecting portion 14 from being worn out. Moreover, since the connection part 14 does not protrude from the end surface comprised by the cutting line 12, the buffer body which has a favorable external appearance is obtained, without disturbing the external appearance of a buffer body.
[0024]
Next, a second embodiment will be described with reference to FIGS. In this embodiment, slits 56 and half-folded fold lines 11 are alternately formed on the cardboard. That is, six slits 56 and five half-folded fold lines 11 are formed in parallel with each other at a predetermined interval in the direction of the corrugated board. Thus, the corrugated cardboard is partitioned into plate-like portions 19-30.
[0025]
Here, the connecting portion 14 that divides the slit 56 is partitioned from the slit 56 by a pair of cuts 13 on both sides thereof. In addition, the structure of the connection part 14 is expanded and shown by FIG. 8A.
[0026]
On the other hand, the half cut fold line 11 is a half cut fold line in which only the liner portion on the front side is connected and the other portion is cut in the thickness direction.
[0027]
The plate-like portion 24 is formed with a horizontally long opening 34. A horizontally long opening 35 is formed so as to cross a slit 56 that crosses between the plate-like portions 25 and 26. A horizontally long opening 36 is formed so as to cross the slit 56 between the plate-like portions 27 and 28. A horizontally long opening 37 is formed so as to cross the slit 56 between the plate-like portions 29 and 30.
[0028]
As shown in FIG. 6, such a cardboard is formed by alternately bending the slits 56 and the half-cut fold lines 11 in opposite directions. When the plate-like portions 19 to 30 are completely folded and stacked, a buffer as shown in FIG. 7 is obtained. Here, the horizontally long openings 34 to 37 are aligned with each other, thereby forming a recess facing from the upper surface to the side surface. This recess forms a recess that receives the corner portion of the article.
[0029]
In such a shock absorber, in particular, the connecting portion 14 of the slit 56 formed alternately with the half-folded fold line 11 for assembling this shock absorber is formed between a pair of straight cuts 13 as shown in FIG. 8A. Instead of such a configuration, a configuration as shown in FIG. 8B may be used. In this configuration, cuts 54 perpendicular to the ends of the cuts 13 on both sides of the connecting portion 14 are formed laterally. This makes it particularly difficult for the end of the cut 13 to break. Alternatively, as shown in FIG. 8C, an oblique cut 50 may be formed at each end of the cut 13 instead of the right-angle cut 54.
[0030]
Further, as shown in FIG. 8D, a pair of perforated cuts 51 can be formed at an intermediate position of the connecting portion 14. Alternatively, as shown in FIG. 8E, an arcuate cut 52 may be formed in the base portion of the connecting portion 14. Such a cut 52 reduces the longitudinal tension applied to the connecting portion 14 and prevents the connecting portion 14 from being broken or cut.
[0031]
In addition, since the connecting portion 14 is formed so as to connect the slit 56 in particular, the connecting portion 14 is formed as shown in FIG. However, it does not protrude from the outer surface of the buffer body, and the outer surface of the connecting portion 14 forms substantially the same plane as the outer surface of the buffer body, so that a rectangular parallelepiped buffer body with a clean appearance is assembled. This tendency becomes more prominent if the connecting portion 14 is crushed flat in advance.
[0032]
In addition, as shown in FIG. 6, this shock absorber is used to apply paste to the plate-like portions 20, 22, 24, 26, and 28 when the cardboard is alternately folded at the slit 56 and the half-folded fold line 11. 57 is applied. Here, when the sheet is folded in a state where the paste is applied in advance, the lower fold line shown in FIG. The half-cut fold line 11 is in a state where the inner surface side liner is continuous. Accordingly, there is no gap in the half-cut fold line 11, and no glue flows on the lower side. Accordingly, no glue is attached to the lower surface when folded, and the machine is not folded with a glue when the folding body is assembled by the folding operation.
[0033]
Here, as the above-mentioned paste 57, vinyl acetate paste, starch paste, and the like are suitable in terms of recycling. Note that the plate-like portions 19 to 30 can be joined to each other with an adhesive instead of the paste 57.
[0034]
It is preferable to supply the paste 57 to a portion where the load is applied intensively. Also, the strength may be changed by adjusting the amount of glue. Furthermore, the paste which penetrates into paper is preferable. Non-penetrating glue is unsuitable for peeling when impact is applied.
[0035]
Further, the buffering effect of the buffer can be adjusted according to the amount of glue supplied and the position where the glue is supplied. In general, when glue is supplied and adhered, the pressure-resistant strength increases although the buffering effect decreases. Therefore, it is preferable not to apply glue to a portion that requires cushioning properties, and to apply glue to a portion that does not require cushioning properties. This makes it possible to create a portion having a buffering effect and a portion having no buffering effect, even though it is a single-piece buffer.
[0036]
Next, a third embodiment will be described with reference to FIG. Here, seven cutting lines 12 are formed on the cardboard in parallel to each other and at right angles to the step. A plurality of connecting portions 14 are formed so as to cross these cutting lines 12. Moreover, circular openings 58 are appropriately formed in the plate-like portions 20 to 25 other than the plate-like portions 19 and 26 at both ends of the plate-like portions 19 to 26. Such an opening 58 is for enhancing the buffering effect.
[0037]
Such a corrugated cardboard is bent in the opposite direction alternately at the cutting line 12 having the connecting portion 14, thereby assembling a rectangular parallelepiped buffer. Note that the plate-like portions 19 to 26 can be glued to each other with a glue or an adhesive and can be joined.
[0038]
The shock absorber assembled by such corrugated cardboard is reduced in weight by the circular opening 58, and flexible shock-absorbing properties are exhibited by the circular opening 58 inside. That is, a shock absorber having a low elastic modulus and a buffer effect can be obtained.
[0039]
【The invention's effect】
The main invention of the present application is at least a part of a shock absorber made of continuous corrugated cardboard and having a plurality of bent portions that are substantially parallel to each other and alternately bent in opposite directions at the bent portions. The bent portion is formed of a cutting line, and a connecting portion is formed by a pair of cuts intersecting the cutting line, and the portions on both sides of the cutting line are foldably connected by the connecting portion, and the connecting portion is formed. The end of the cut is formed by an oblique cut that increases the width of the connecting portion.
[0040]
Therefore, in such a buffer body, an oblique notch is formed at the end of the notch forming the connecting portion so that the width of the connecting portion is widened, and the oblique portion particularly breaks the root portion of the connecting portion. Is prevented, and it becomes difficult to break when assembled by bending.
[0041]
Another main invention of the present application is a shock absorber comprising a plurality of bent portions that are made of continuous corrugated cardboard and that are substantially parallel to each other, and are alternately bent in opposite directions at the bent portions. The bending part is composed of a cutting line that leaves the liner on the surface and a slit having a predetermined width, the cutting line and the slit are alternately formed, and a connection part is formed by a pair of cuts that intersect the slit, and the connection part The both sides of the slit are connected to each other in a foldable manner, and the end of the notch forming the connecting portion is formed of an oblique notch that widens the connecting portion, and the cutting line is valley-folded with the liner inside. It is made to be done.
Therefore, according to such a buffer body, it becomes possible to bend a corrugated cardboard alternately by the cutting line which left the liner of the surface, and the slit which has a connection part, and a buffer body is assembled by this. In particular, when the valley is folded with the liner inside, a slit that opens downward is not formed in this portion, so that even if paste or adhesive is supplied, it is prevented from flowing downward.
[Brief description of the drawings]
FIG. 1 is a developed plan view of a shock absorber according to a first embodiment.
FIG. 2 is an external perspective view showing an assembling operation of the buffer body.
FIG. 3 is an external perspective view of the assembled shock absorber.
FIGS. 4A and 4B are a plan view and an enlarged cross-sectional view showing a structure of a connecting portion. FIGS.
FIG. 5 is a developed plan view of a shock absorber according to a second embodiment.
FIG. 6 is an external perspective view showing an assembling operation of the buffer body.
FIG. 7 is an external perspective view of the buffer body.
FIG. 8 is an enlarged plan view showing a configuration of a connecting portion.
FIG. 9 is an enlarged perspective view of a main part showing a state of a connecting part when assembled.
FIG. 10 is a development plan view of a cardboard constituting a buffer according to still another embodiment.
[Explanation of symbols]
11 Half-cut fold line 12 Cutting line 13 Cutting 14 Connection part 19-30 Plate-like part 33 Slit-like opening 34-37 Horizontal opening 39 Cutting line 40 Cutting 41 Connection part 42 Receptacle 44 Cutting line 45 Connection part 46 Locking Piece 50 Diagonal cut 51 Perforated cut 52 Arc shaped cut 53 Diagonal perforated cut 54 Right angle cut 56 Slit 57 Glue 58 Circular opening

Claims (7)

In a shock absorber made of continuous corrugated cardboard, having a plurality of bent portions substantially parallel to each other, and alternately bent in opposite directions at the bent portions,
At least a part of the bent portion is constituted by a cutting line, a connecting portion is formed by a pair of cuts intersecting the cutting line, and the portions on both sides of the cutting line are connected by the connecting portion so as to be bendable,
In addition, the shock absorber is characterized in that the end of the notch forming the connecting portion is formed of an oblique notch that increases the width of the connecting portion.   The shock absorber according to claim 1, wherein a discontinuous perforated cut extending in a width direction of the connecting portion is formed at an intermediate position of the connecting portion.   The shock absorber according to claim 1 or 2, wherein a curved notch extending in a width direction of the connecting portion is formed in the vicinity of a terminal end of the connecting portion.   The shock absorber according to any one of claims 1 to 3, wherein the connecting portion is flattened. In a shock absorber made of continuous corrugated cardboard, having a plurality of bent portions substantially parallel to each other, and alternately bent in opposite directions at the bent portions,
The bending portion is composed of a cutting line leaving a liner on the surface and a slit having a predetermined width, and the cutting line and the slit are alternately formed,
Moreover, a connecting portion is formed by a pair of cuts intersecting the slit, and the portions on both sides of the slit are connected by the connecting portion so that they can be bent,
In addition, the end of the cut forming the connecting portion is composed of an oblique cut such that the width of the connecting portion is widened,
The shock absorber according to claim 1, wherein the cutting line is valley-folded with the liner inside.   6. The shock absorber according to claim 5, wherein a discontinuous perforation in the width direction of the connecting portion is formed at an intermediate position of the connecting portion.   The shock absorber according to claim 5, wherein a curved notch extending in a width direction of the connecting portion is formed in the vicinity of a terminal end of the connecting portion.

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