JP6631275B2 - Sheet material locking structure and package having the locking structure - Google Patents

Description

  The present invention relates to a sheet material locking structure and a package having the locking structure.

  2. Description of the Related Art Conventionally, a package formed by folding a sheet material such as corrugated cardboard or paperboard has been frequently used for packaging various articles. For example, among devices such as outdoor units of air conditioners, a plurality of devices are vertically stacked and stored at the time of storage in order to save space. For example, a cushioning material 50 as shown in FIG. 4 is provided between the upper and lower devices so that the devices are not damaged or deformed. The device illustrated in FIG. 4 is an outdoor unit 51 of an air conditioner, and another outdoor unit (not shown) is stacked and stored on the outdoor unit 51 with the cushioning material 50 interposed therebetween (a so-called outdoor unit). , “Stacking”).

  The cushioning material 50 has, for example, a wooden frame 52 as shown in FIG. 5 as a skeleton, and a wooden tray 52 wrapped with a top tray 53 which is a cardboard packaging body. The wooden frame 52 includes a vertical member 52a and a horizontal member 52b, and a plurality of horizontal members 52b are fixed at predetermined intervals on the lower surface of a pair of vertical members 52a arranged in parallel with each other. I have. In the example shown in FIG. 5, three cross members 52 are used.

  The top tray 53 is manufactured by bending a cardboard sheet material, and is manufactured using, for example, a sheet material 54 having a development view shown in FIG. 6. The top tray 53 is formed in a frame shape or a rectangular shape using a pair of sheet members 54. One sheet member 54 is fixed to the other sheet member 54 by an adhesive applied to the ear 55.

  Each sheet member 54 includes a first sheet member 57 having a locking projection 56 and a second sheet member 59 having a locking slit 58 into which the locking projection 56 can be inserted. The sheet material 57 and the second sheet material 59 are connected via another sheet material 60. The first sheet material 57 and the second sheet material 59 are arranged on the short side of the wooden frame 52. The sheet member 54 has a third sheet member 61 disposed on the long side of the wooden frame 52. The third sheet material 61 is connected to the second sheet material 59. Each sheet member 54 includes a first sheet member 57, a second sheet member 59, a sheet member 60, and a third sheet member 61.

  As shown in FIG. 7, the wooden frame 52 and the top tray 53 are assembled by placing the wooden frame 52 in the top tray 53 in which a pair of sheet members 54 are assembled in a frame shape. At this time, the sheet material 54 constituting the top tray 53 is in a state in which the portion indicated by a in FIG. 6 is folded in a valley, that is, bent toward the inside of the top tray 53. The top tray 53 is arranged upside down so that the upper part becomes lower during use. In addition, the wooden frame 52 is also arranged upside down so that the upper part becomes the lower part when used. In the example shown in FIG. 7, the vertical member 52 a is located at the top during use, and is arranged such that the vertical member 52 a is located at the time of assembling with the ceiling tray 53.

  After disposing the wooden frame 52 in the top tray 53, the first sheet member 57 located below the horizontal member 52b is deformed by bending the sheet member 60 so as to be located above the horizontal member 52b. . That is, the sheet member 60 is bent so that the horizontal member 52b is wound around the sheet member 60 and the first sheet member 57. Next, the locking protrusion 56 formed on the side edge 57a of the first sheet material 57 is inserted into the locking slit 58 formed on the second sheet material 59, and the locking protrusion 56 is engaged. The stop slit 58 is engaged. In this way, the assembled cushioning member 50 is turned upside down and covered on the upper surface or the top surface of the outdoor unit 51, whereby the arrangement of the cushioning member 50 is completed.

  In the above-described ceiling tray 53, a linear locking slit 58 is employed. However, in the case of such a locking slit 58, when the locking protrusion 56 is inserted, there are many linear friction portions. There is a problem that workability is poor. In addition, there is also a problem that the locking projection 56 once inserted may easily come off due to dimensional tolerance. Further, since the locking slit 58 is thin, a scrap is easily left when the locking slit 58 is processed, and there is a problem that an operation of removing the scrap is required.

Also, instead of the locking structure using linear friction as described above, the burrs 63 on both sides of the locking projection 62 are connected to both ends of the locking slit 64 as shown in FIG. It is conceivable that it is hooked and fixed. However, in this case, if the burrs 63 are bent at the time of work or the like, the burrs 63 cannot be locked to the edge 64 a of the locking slit 64, and thus cannot function as a locking structure.
Further, as shown in FIG. 8 (b), the elliptical locking projection 65 is inserted into the similarly elliptical locking slit 66, and the locking projection 65 is bent to lock the slit. It is conceivable to fix to the edge of 66. However, in this case, there is a problem that the protrusion to the outside, that is, the portion protruding outward from the cushioning material becomes large, and the protruding portion is caught at the time of cargo handling. Further, the development area of corrugated cardboard, which is a material, becomes large, which causes a cost increase.

  The present invention has been made in view of such circumstances, has excellent workability during assembly, and has a sheet material locking structure that can be stably locked and a locking structure for the sheet material. It is intended to provide a package having the same.

The locking structure of the sheet material according to the first aspect of the present invention (hereinafter, also simply referred to as “locking structure”)
(1) A locking structure of a first sheet material having a locking protrusion and a second sheet material having a locking slit into which the locking protrusion can be inserted,
The locking projection is formed on one side edge of the first sheet material,
The locking slit has a wavy shape,
The distance between the first virtual tangent passing through the vertex of the waveform wave on one side edge of the locking slit and the second virtual tangent passing through the vertex of the waveform wave on the other side edge of the locking slit is , And not more than the thickness of the locking projection.

  In the locking structure according to the first aspect of the present invention, the locking slit on which the locking projection is locked has a wavy shape, and the locking slit passes through the vertex of the waveform of one side edge of the locking slit. A distance between one virtual tangent and a second virtual tangent passing through a vertex of a waveform wave on the other side edge of the locking slit is equal to or less than the thickness of the locking protrusion. For this reason, the locking projection can be fixed to the locking slit by utilizing friction with the peak of the waveform wave, and the locking projection is inserted into a slit wider than the thickness of the locking projection. Since the pieces only have to be inserted, the insertion operation is easy and the workability can be improved. Further, it is possible to use a locking projection of a conventional shape, and it is not necessary to increase the development area of a sheet material such as cardboard. Furthermore, since the locking structure utilizes the friction with the peak of the waveform wave, the width of the slit can be made larger than that of a conventional elongated linear slit, and as a result, the scum of the locking slit is reduced. Easy to take. Since scraps are less likely to remain on the sheet material, it is possible to reduce the number of steps for checking whether or not scraps remain.

(2) In the locking structure of (1), it is preferable that a distance between the first virtual tangent and the second virtual tangent is 0.1 mm to 1.0 mm smaller than a thickness of the locking projection. In this case, sufficient friction can be obtained between the apex of the wave of the waveform and the locking projection while securing the easiness of inserting the locking projection into the locking slit. The piece can be firmly fixed to the locking slit.

(3) In the locking structure according to (1) or (2), it is preferable that the locking slit has a plurality of waves. In this case, the locking protruding pieces can be fixed to the locking slits at a larger number of positions (vertexes of the wave of the waveform), and firm fixing can be performed.

(4) In the locking structure of (1) to (3), the wave R of the waveform of the locking slit can be set to 20 mm to 40 mm. In this case, sufficient friction can be obtained between the top of the waveform wave and the locking projection while securing the ease of the insertion operation of the locking projection into the locking slit. The projecting piece can be firmly fixed to the locking slit.

(5) In the locking structure according to any one of (1) to (4), it is preferable that an anti-slip agent is applied to at least a part of the surface of the locking protrusion. In this case, the frictional force between the peak of the wave of the waveform and the locking projection can be increased, and the locking projection can be more securely fixed to the locking slit.

The package according to the second aspect of the present invention includes:
(6) A package having the locking structure according to any one of (1) to (5),
The first sheet material and the second sheet material are connected as an integral sheet material,
The locking projection is inserted into the locking slit by bending the integrated sheet material.

  In the package according to the second aspect of the present invention, since the above-described locking structure is employed, the work of inserting the locking protrusion into the locking slit is easy, and the workability can be improved. it can. Further, it is possible to use a locking projection of a conventional shape, and it is not necessary to increase the development area of a sheet material such as cardboard. Furthermore, since the locking structure utilizes the friction with the peak of the waveform wave, the width of the slit can be made larger than that of a conventional elongated linear slit, and as a result, the scum of the locking slit is reduced. Easy to take. Since scraps are less likely to remain on the sheet material, it is possible to reduce the number of steps for checking whether or not scraps remain.

  ADVANTAGE OF THE INVENTION According to the locking structure of the sheet material of this invention, and the package body which has the said locking structure, the workability | operativity at the time of assembly is excellent, and it can be stably locked.

It is a development view of the sheet material which constitutes the package concerning one embodiment of the present invention. It is an assembly drawing of a package concerning one embodiment of the present invention. FIG. 2 is an enlarged explanatory view of a main part of the sheet material shown in FIG. 1. It is a perspective explanatory view which shows an outdoor unit and the conventional package. It is explanatory drawing which shows an example of a wooden frame. It is a development view of an example of the conventional sheet material. It is a perspective explanatory view showing the point of assembling a package to a wooden frame. It is explanatory drawing of the locking structure of the conventional sheet material.

  Hereinafter, an embodiment of a locking structure of the present invention and a package having the locking structure will be described in detail with reference to the accompanying drawings. It should be noted that the present invention is not limited to these exemplifications, but is indicated by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

FIG. 1 is a development view of a sheet material 1 constituting a top tray which is a package according to an embodiment of the present invention, and FIG. 2 is a view of a top tray 2 which is a package according to an embodiment of the present invention. It is an assembly drawing.
The cushioning material 4 can be manufactured by covering the wooden tray 3 with the top tray 2. The wooden frame 3 has the same configuration as that shown in FIG. 5 described as the related art, and is composed of a vertical member 3a and a horizontal member 3b. A plurality (three in this embodiment) of horizontal members 52b are fixed at predetermined intervals on the upper surfaces of a pair of vertical members 3a arranged in parallel with each other.

  The top tray 2 is manufactured by bending a corrugated cardboard sheet material, and is manufactured using the sheet material 1 having the developed view shown in FIG. The top tray 2 is formed in a frame shape or a rectangular shape using a pair of sheet materials 1. One sheet material 1 is fixed to the other sheet material 1 by an adhesive applied to the ears 5.

Each sheet material 1 has the same configuration as the sheet material 54 shown in FIG. 6 except that the shape of the locking slit is not linear but corrugated.
That is, each sheet material 1 includes a first sheet material 7 having an elongated rectangular locking protrusion 6 and a second sheet material 9 having a locking slit 8 into which the locking protrusion 6 can be inserted. The first sheet material 7 and the second sheet material 9 are connected via another sheet material 10. The first sheet material 7 and the second sheet material 9 are arranged on the short side of the wooden frame 3. The sheet material 1 has a third sheet material 11 disposed on the long side of the wooden frame 3. The third sheet material 11 is connected to the second sheet material 9. Each sheet material 1 includes a first sheet material 7, a second sheet material 9, a sheet material 10, and a third sheet material 11.

  The assembling of the wooden frame 3 and the top tray 2 is the same as the conventional method described with reference to FIG. That is, the wooden frame 3 is arranged in the ceiling tray 2 in which a pair of sheet materials 1 are assembled in a frame shape. At this time, the sheet material 1 constituting the top tray 2 is in a state where the portion indicated by b in FIG. 1 is folded in a valley, that is, bent toward the inside of the top tray 2. The top tray 2 is arranged upside down so that the upper part becomes lower during use. In addition, the wooden frame 3 is also arranged upside down so that the upper part becomes lower at the time of use.

  After disposing the wooden frame 3 in the top tray 2, the first sheet member 7 located below the horizontal member 3b is deformed by bending the sheet member 10 so as to be located above the horizontal member 3b. . That is, the sheet material 10 is bent so that the horizontal material 3b is wound around the sheet material 10 and the first sheet material 7. Next, the locking protrusion 6 formed on the side edge 7a of the first sheet material 7 is inserted into the locking slit 8 formed on the second sheet material 9, and the locking protrusion 6 is engaged. Engage with the stop slit 8. The arrangement of the cushioning material 4 is completed by placing the assembled cushioning material 4 upside down on the upper or top surface of the outdoor unit.

  In the present embodiment, a wavy slit as shown in FIG. Then, as shown in the enlarged view of FIG. 3B, the first virtual tangent line 13 passing through the vertex 12 of the waveform of the one side edge 8a of the locking slit 8 in the locking slit 8; The distance d between the locking slit 8 and the second imaginary tangent 15 passing through the vertex 14 of the wave of the waveform of the other side edge 8b is equal to or less than the thickness of the locking projection 6, and in the present embodiment, the sheet is The thickness is set so as to be equal to or less than the thickness of the cardboard constituting the material 1.

  For this reason, the locking projection 6 can be fixed to the locking slit 8 by utilizing the friction with the vertexes 12 and 14 of the waveform wave, and the slit is wider than the thickness of the locking projection 6. Since the locking projection 6 may be inserted into the inside, the insertion operation is easy and the workability can be improved. Further, it is possible to use a locking projection of a conventional shape, and it is not necessary to increase the development area of a sheet material such as cardboard. Furthermore, since the locking structure utilizes the friction with the vertexes 12 and 14 of the waveform wave, the width of the slit can be increased as compared with the conventional elongated linear slit, and as a result, the locking slit 8 It is easy to remove the scraps. Since the amount of scum remaining on the sheet material 1 is reduced, it is possible to reduce the number of steps for checking whether or not scum remains.

  As described above, the relationship between the thickness of the locking projection 6 and the distance d is set such that the distance d is equal to or less than the thickness of the locking projection 6, but the distance d is greater than the thickness. It is desirable to be slightly smaller, specifically 0.1 mm to 1.0 mm smaller. In this way, by making the distance d 0.1 mm to 1.0 mm smaller than the thickness, the work of inserting the locking protrusion 6 into the locking slit 8 is ensured, and the peak 12 of the waveform wave is secured. , 14 and the locking projection 6 can be provided with sufficient friction, and the locking projection 6 can be firmly fixed to the locking slit 8.

  The waveform of the locking slit 8 in the present embodiment has a sine curve shape, and the R of the waveform is 20 mm to 40 mm. By providing such a radius, it is possible to easily insert the locking projection 6 into the locking slit 8 and to maintain the ease between the vertices 12 and 14 of the waveform wave and the locking projection 6. Sufficient friction can be obtained, and the locking projection 6 can be firmly fixed to the locking slit 8.

  In the present embodiment, a varnish (varnish) as a non-slip agent is applied to the surface of the locking projection 6. By applying such a varnish, the frictional force between the vertices 12 and 14 of the corrugated wave and the locking projection 6 can be increased, and the locking projection 6 can be more firmly fixed to the locking slit 8. Can be fixed to The varnish may be applied to the entire surface of the locking projection 6 or may be applied partially.

[Other modifications]
The present invention is not limited to the above-described embodiments, and various changes can be made within the scope of the claims.
For example, in the above-described embodiment, approximately two waveforms are formed on the side edge of the locking slit, but one waveform may be formed. Further, three or more waveforms may be formed. When a plurality of waveforms are formed, the locking projections can be fixed to the locking slits at more locations (vertexes of the waveform wave) than in the case of a single waveform, and firm fixing can be performed. .

  Further, in the above-described embodiment, corrugated cardboard is used as the sheet material, but other sheet materials such as paperboard can be used as long as they have a certain degree of flexibility.

  Further, in the embodiment described above, the present invention is applied to the package in the cushioning material when the outdoor units are stacked, but the locking structure of the present invention is applied to a packaging container using a sheet material, a packaging box, and the like. It can also be applied to other packages.

  In the above-described embodiment, two locking structures are used on one side (short side) of the package. However, the number of locking structures may be one, or three or more. It may be.

1: Sheet material 2: Top tray (package)
3: Wooden frame 3a: Vertical material 3b: Horizontal material 4: Buffer material 5: Ear part 6: Locking projection 7: First sheet material 7a: Side edge 8: Locking slit 8a: Side edge 8b: Side edge 9 : Second sheet material 10: sheet material 11: third sheet material 12: vertex 13: first virtual tangent line 14: vertex 15: second virtual tangent line 50: cushioning material 51: outdoor unit 52: wooden frame 52 a: vertical member 52 b : Horizontal material 53: Top tray 54: Sheet material 55: Ear part 56: Locking projection 57: First sheet material 57 a: Side edge 58: Locking slit 59: Second sheet material 60: Sheet material 61: Third Sheet material 62: locking projection 63: burrs 64: locking slit 65: locking projection 66: locking slit

Claims (6)

A locking structure of a first sheet material (7) having a locking protrusion (6) and a second sheet material (9) having a locking slit (8) into which the locking protrusion (6) can be inserted. And
The locking projection (6) is formed on one side edge (7a) of the first sheet material (7),
The locking slit (8) has a sinusoidal waveform,
Said locking slit (8) has a plurality of waves,
A first imaginary tangent line (13) passing through a vertex (12) of a wave of one side edge (8a) of the locking slit (8) and the other side edge (8b) of the locking slit (8); The distance (d) between the second tangent line (15) passing through the vertex (14) of the wave having the waveform of (a) and (b) is equal to or less than the thickness of the locking protrusion (6).   The distance (d) between the first virtual tangent (13) and the second virtual tangent (15) is 0.1 mm to 1.0 mm smaller than the thickness of the locking projection (6). The locking structure of the sheet material described in the above.   The locking structure of a sheet material according to claim 1 or 2, wherein the locking slit (8) has a plurality of waves.   The structure for locking a sheet material according to any one of claims 1 to 3, wherein the wave R of the waveform of the locking slit (8) is 20 mm to 40 mm.   The locking structure for a sheet material according to any one of claims 1 to 4, wherein an anti-slip agent is applied to at least a part of a surface of the locking protrusion (6). A package (2) having the sheet material locking structure according to any one of claims 1 to 5,
The first sheet material (7) and the second sheet material (9) are connected as an integral sheet material,
The package (2), wherein the locking projection (6) is inserted into the locking slit (8) by bending the integrated sheet material.

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