JPH0352657Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a blank board for a case used for packaging video tape cassettes, and more specifically, to
With the cassette housed inside, hot air is injected between the facing surfaces of the side panels, etc. to be folded and polymerized, and only the surface layer of the side panels, etc. is instantaneously heated and immediately crimped as a welding material. The present invention relates to a blank material for a packaging case of a video cassette, which improves the efficiency of case formation.

(Prior Art) Video tape cassettes for recording television are generally housed in a case and packaged for protection, display, decoration, and the like.

Cases for cassette packaging are usually made by punching a relatively thick sheet material, such as cardboard or plastic sheet, into a predetermined shape while forming indented lines for folding, and then forming a blank board. The product is made by folding it and gluing the side panels together at the overlapping part. The cassette is inserted and packaged inside this case for distribution and use.

The above-mentioned blank board has conventionally been used, for example, in
No. 37254 includes an elongated back panel, a first main panel connected to one long side of the back panel via an indented folding line, and a first main panel connected to the other long side of the back panel via an indented folding line. a pair of first side panels connected via folding indented lines on both side edges of the first main panel in a direction perpendicular to the longitudinal direction of the back panel; and the back panel. A pair of second side panels are connected via indented folding lines on both side edges of the second main panel in a direction perpendicular to the longitudinal direction, and indented folding lines are provided on both short sides of the back panel. The edge of the first side panel adjacent to the side flap is cut diagonally away from the side flap toward the outer end, and the side panel and A structure has been proposed in which the edge of the first side panel fits into the cutout of the side flap when the case is assembled by folding the side flap.

(Problems to be Solved by the Invention) However, in the case of the above-mentioned conventional example, in order to form the case with high efficiency, hot air is introduced between both opposing sides of the side panels to be folded and overlapped while the cassette is housed. This hot air instantly heats only the surface layer of the facing surface of the side panel and immediately pressurizes it to make it weldable. When this molding is performed, this hot air forms a bond between the cutout of the side flap and the edge of the first side panel. It is thought that the particles may enter the inside of the case through the gaps, causing problems such as thermal deformation and deterioration of the housing cassette.

In view of the above, the present invention has been developed to prevent the injected hot air from entering the inside of the case during the packaging process, even if the facing surface of the side panel is heated by injecting hot air during case molding. To provide a blank plate in which a side panel does not come into contact with a side flap when folding the side panel even if the side flap is not folded accurately, and the case has a well-finished shape.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a long and narrow back panel 3 and an intaglio line 22 for folding on one long side thereof.
The first main panel 1 is connected to the other long side of the back panel 3 via the folding intaglio line 23, and the back panel 3 is connected in the longitudinal direction. A pair of first side panels 4, 5 connected to both side edges of the first main panel 1 in orthogonal directions via intaglio lines 20, 21 for folding, and a direction orthogonal to the longitudinal direction of the back panel 3. A pair of second side panels 14 and 15 are connected to both side edges of the second main panel 2 via indented lines 24 and 25 for folding, and indented lines for folding are provided on both short sides of the back panel 3. 26,2
It consists of approximately right triangular side flaps 11 and 12 that are connected via 7, and when the side flaps 11 and 12 and the side panels 4, 14, 5, and 15 are sequentially folded in with the cassette accommodated inside, In a blank plate for a packaging case of a videotape cassette, the surface layer of the opposing surface is instantaneously heated by injecting hot air between the opposing surfaces to be polymerized so that it becomes meltable and can be immediately pressed. , 12 has a flattened thin layer portion 6.16 on the peripheral edge of the oblique side that slopes away from the first side panel 4, 5 as it reaches the tip, and also has a thinned layer portion 6.16 on the peripheral edge of the oblique side that slopes away from the first side panel 4, 5 adjacent thereto. Panel 14,1
5 have cutouts 7, 17 on their sides to provide a relatively wide gap between the first side panels 4, 5, while the edges 9, adjacent to the side flaps 11, 12 of the first side panels 4, 5; 19 is the side flap 1 as it reaches the outer end.
1 and 12, and the flattened thin layer portions 6 and 16 of the side flaps 11 and 12 and the first
The peripheral edges of the side panels 4, 5 on the edge 9, 19 side are configured so that they overlap each other when the case is assembled by folding the first side panels 4, 5 and the side flaps 11, 12.

(Function) Therefore, the compressed thin layer portions 6, 16 of the side flaps 11, 12 and the peripheral edge on the edge 9, 19 side of the first side panels 4, 5 are connected to the first side panels 4, 5 and the side By configuring the flaps 11 and 12 to overlap each other when assembling the case by folding them, it is possible to ensure that hot air does not enter the inside of the case from here without increasing the thickness of the overlapped part too much. In addition to preventing the side flap 1
The cutout portions 7 and 17 are formed so as to provide a relatively wide gap between the sides of the side panels 1 and 12 and the second side panels 14 and 15.
By providing this, even if the side flaps 11 and 12 are not folded in correctly, the side panels 14 and
This is to prevent the side panels 14, 15 from coming into contact with the side flaps 11, 12 when folding the flap 5.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a developed view of a blank board according to the present invention, which is formed by punching and forming a sheet of compressed foamed polypropylene board with a thickness of 0.5 to 1 mm.

In the figure, reference numeral 1 denotes a first main panel with dimensions suitable for the shape of the largest surface of the video cassette tape to be accommodated, and on one side of this main panel 1,
A second main panel 2 is connected via an elongated back panel 3 having a width suitable for the thickness of the cassette. This second
The main panel 2 is substantially the same size as the first main panel 1, but its dimension in the long side direction is larger than the first main panel 1 by the thickness of the two sheets.

A pair of first side panels 4 and 5 are connected to each of the short sides of the first main panel 1. The width of these side panels 4, 5 is sized to match the thickness of the cassette case. Furthermore, the edges 9 and 19 of the second side panels 4 and 5 on the second main panel 2 side are cut off diagonally.

On the other hand, each of the short sides of the second main panel 2 also has a first
A pair of second side panels 1 substantially similar to the main panel 1
4 and 15 are connected.

Side flaps 11 and 12 are provided adjacent to the short sides of the back panel 3. These side flaps 11, 12 are approximately in the shape of a right triangle, and the base thereof is connected to the back panel 3, and the side flaps 11, 12 are attached to the periphery of the inclined oblique side, as shown in the cross-sectional view of FIG. The thickness t is much thinner than the thickness T of 12.
The piezo-thin layer portions 6 and 16 are formed. These compressed thin layer portions 6 and 16 are formed by applying heating and squeezing pressure to the blank plate, and the oblique side portion gradually forms the first side panel 4 toward the apex (tip) of the triangle. Therefore, there is a V between the edges 9, 19 of the first side panels 4, 5 and the oblique sides of the side flaps 11, 12.
There will be a letter-shaped notch.

On the other hand, the side flaps 11 and 12 and the second side panel 1
Cutouts 7, 17 are provided on the sides of the side flaps 11, 12 so that relatively wide gaps are formed between the flaps 4, 15.

At the boundaries between the first main panel 1 and the back panel 3 and between the second main panel 2 and the back panel 3 described above, there are indented lines 22 and 23 for folding, respectively.
Folding intaglio lines 20 and 21 are provided at the boundaries between the main panel 2 and the first side panels 4 and 5, and similar folding intaglio lines 2 are provided at the boundaries between the second main panel 2 and the second side panels 14 and 15.
4 and 25 are provided, respectively. Furthermore, cut lines 28 and 29 are formed at the boundaries between the side panels 11 and 12 and the second side panels 14 and 15.

Note that 30 and 31 are notches provided on the outer edges of the main panels 1 and 2 to facilitate removal of the cassette housed in the case.

The blank plate having the above structure is used for packaging video cassette tapes by, for example, the following automatic folding process.

First, as shown in FIG. 3, the first side panel 4,
5. Second side panels 14, 15 and side flap 1
As shown in FIG. 3, a blank board on which panels 1 and 12 have been erected in advance is transferred onto a traveling conveyor belt V shown in FIG. 6 with the second main panel 2 facing in the traveling direction. The cassette C is placed on the main panel 1, and then, as shown in FIG. 4, the second main panel 2 and the back panel 3 are bent using the back of the cassette C. As a result, the state shown in FIG. 4 is obtained, and in this state, the compressed thin layer portions 6, 16 of the side flaps 11, 12 are placed on the peripheral edges of the first side panels 4, 5 on the edge portions 9, 19 side. They overlap in the state shown in FIG.

The above steps are performed on the moving conveyor belt V. Then, in the state shown in FIG.
The case containing the cassettes C on the conveyor belt V is pressed from above in the direction of arrow P by an appropriate member, and at this point one side panel 4, 14 of both main panels 1, 2, and the other side panel are pressed. Hot air at about 300 to 500° C. is injected for about 0.5 seconds from flat nozzles H arranged on both sides of the conveyor belt V over the entire length of the wedge-shaped space W formed between the conveyor belts V and 15. , 14 and 5, 15
The opposing surfaces of the panels are heated to melt their surface layers, and the inclined second side panels 14 and 15 are immediately pressed onto the opposing surfaces of the first side panels 4 and 5, respectively, using a suitable pressing member. Then, the cassette C is welded and fixed, and the packaging of the cassette C into the case is completed.

When the hot air is injected, the peripheral edges of the first side panels 4, 5 on the edge 9, 19 side and the side panel 1
Since the compressed thin layer parts 6 and 16 of Nos. 1 and 12 are superposed on each other as described above, hot air does not enter the surface of the cassette C housed in the case, and the panel seal is prevented by hot air injection. Since the temperature rise is limited to only the surface layer, damage to the cassette C due to hot air is completely prevented.

In the above case, it goes without saying that the temperature, injection pressure, injection amount, etc. of the hot air can be changed as appropriate depending on the type, shape, etc. of the blank plate material. Automatic packaging into a case is possible.

By the way, when the side flaps 11 and 12 are folded in by a machine, it is inevitable that the case partially formed by folding the side panels and the back panel will be slightly distorted. If such a distortion exists, assuming that there is no cutout 7, 17 in the folded side flaps 11, 12 associated with it, the side flaps 11, 12
12 may protrude from the upper surface of the side panel 5, for example, as shown exaggeratedly with a chain line in FIG.
This phenomenon can also occur due to other causes such as slight dimensional deviations of the blank board. If the side flaps protrude in this way, there will be interference with the protruding portions when folding the second main panel 2 or the second side panels 14 and 15, resulting in bending or unevenness in the case of the finished product. will occur.

However, as in the present invention, the side flaps 11,
By forming the cutouts 7, 17 on the flaps 12, it is possible to prevent a portion of the side flaps 11, 12 from protruding upward, as shown by the solid line in FIG. In fact, even if there is a slight error in dimensions, the above-mentioned interference will not occur, and the occurrence of defective cases can be avoided.

In the above embodiment, the side flaps 11, 12
Although the one in which the compressed thin layer parts 6, 16 are formed only on the sides is shown, as shown in FIG. 8, the first side panel 4,
It is also possible to provide the compressed thin layer portion 20 on the peripheral edge of the end edge 5 on the side of the end edges 9, 19. In this case, it is desirable that the sum of the thicknesses of the two pressure flattened layer parts be equal to the thickness of the side flaps and the first side panel.

(Effects of the invention) Since the present invention has the above-mentioned configuration, it is possible to reliably prevent the influence of hot air on the internal cassette during bonding by jetting hot air when assembling the case, so that the packaging can be carried out safely and reliably. This has the advantage that it is possible to provide a blank board that not only makes it possible to make the same design as possible, but also provides a case with an excellent finish without being affected by slight deviations or dimensional errors during assembly. .

[Brief explanation of drawings]

Fig. 1 is a developed view of a blank plate showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig.
The figure is a perspective view showing the initial stage of packaging when the case is placed on a blank board, Figure 4 is a perspective view showing a further stage of packaging, and Figure 5 is an enlarged perspective view of Figure 4. Figure 6 is a diagram showing the hot air blowing state in the state shown in Figure 4, Figure 7 is an explanatory diagram of the problem when folding the side flaps, and Figure 8 is a developed diagram showing the main parts of another embodiment. be. 1...First main panel, 2...Second main panel, 3
...Back panel, 4,5...First side panel, 14,
15... Second side panel, 11, 12... Side flap, 7, 17... Cutout portion, 6, 16... Polarized thin layer portion, 9, 19... End edge.

Claims (1)

[Scope of utility model registration request] A first main panel 1 connected to an elongated back panel 3 via an indented folding line 22 on one long side thereof.
, a second main panel 2 connected to the other long side of the back panel 3 via an intaglio line 23 for folding, and a first main panel 2 in a direction perpendicular to the longitudinal direction of the back panel 3.
Engraved lines 20 and 21 for folding on both sides of the main panel 1
A pair of first side panels 4, 5 connected via
and an indented folding line 2 on both side edges of the second main panel 2 in a direction perpendicular to the longitudinal direction of the back panel 3.
A pair of second side panels 14, 15 connected via lines 4, 25, and side flaps in a substantially right triangular shape connected to both short sides of the back panel 3 via indented lines 26, 27 for folding. 11, 12, and the side flaps 11, 12 with the cassette accommodated inside.
12 and the side panels 4, 14, 5, and 15 were sequentially folded, and hot air was injected between the opposing surfaces to be polymerized to instantaneously heat the surface layer of the opposing surfaces, making it meltable and immediately crimping it. In blank boards for packaging cases for videotape cassettes,
Each of the side flaps 11, 12 has a flattened thin layer portion 6, 16 at the peripheral edge on the oblique side side that slopes away from the first side panel 4, 5 as it reaches the tip end, and Adjacent second
The side flaps 11, 17 of the first side panels 4, 5 have cutouts 7, 17 on their sides so as to provide a relatively wide gap between the side panels 14, 15.
The edges 9, 19 adjacent to the flaps 12 are cut obliquely away from the side flaps 11, 12 as they reach the outer ends, and are cut off obliquely so as to separate from the side flaps 11, 12 and the first side. Edges 9, 1 of panels 4, 5
A blank board for a packaging case for a videotape cassette, characterized in that the peripheral edge on the 9th side is constructed such that the first side panels 4, 5 and the side flaps 11, 12 overlap each other when the case is assembled by folding them.