JPH07149385A - Package - Google Patents

Abstract

(57) [Summary] [Purpose] Packaging of display elements that are fragile using a non-foaming plastic packaging. [Structure] By forming a plastic sheet by press molding, a plurality of storage portions 2 for storing individual display elements are formed, and a package 1 having a flange portion 3 on the periphery thereof is formed. By stacking and using this package, the collar portion acts as a cushioning material, and damage due to impact can be less likely to occur.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic package for accommodating a flat display element such as a liquid crystal display element.

[0002]

2. Description of the Related Art Conventionally, as a plastic package for accommodating a flat panel display element such as a liquid crystal display element,
Styrofoam packages are often used. A liquid crystal display element is stored in a storage portion of the styrofoam package, and a required number of the packages are stacked and placed in a cardboard box or the like.

Even if the stacked body made of styrofoam is put in a corrugated cardboard box directly, it has a high elasticity, so that the liquid crystal display element is less likely to be broken by a shock during transportation. Further, since it is soft per se, it has an advantage that the polarizing film or the like attached to the surface of the liquid crystal display element is not easily damaged, and is inexpensive. For this reason, it was the most suitable as a package for a liquid crystal display element.

[0004]

On the other hand, in recent years, due to the problems of waste and recycling, it has been demanded to reduce the use of expanded polystyrene material which is bulky and easily soiled and difficult to reuse. Therefore, even as a package of the liquid crystal display element,
It is beginning to be required to use other packaging bodies without using Styrofoam.

Specifically, plastic sheets are beginning to be used as an alternative material. This plastic package is formed by pressing a sheet into a predetermined shape and used as a tray. At the time of this molding, an accommodating portion for accommodating the individual liquid crystal display elements is formed, and an interval restricting portion that regulates an interval when stacked is formed and used.

The conventional styrofoam package has elasticity and absorbs a considerable impact by itself, so that the liquid crystal display element is unlikely to be damaged during transportation. However, a package using such a plastic sheet is
When stacked and transported in a cardboard box, the impact applied to the cardboard boxes is transmitted to the liquid crystal display element quite strongly. For this reason, the impact applied to the box is likely to damage the contained liquid crystal display element.

Therefore, such a plastic tray may be used in combination with a foam material such as styrene foam as a cushioning material. In this case, although the amount is reduced, there is still a problem that the polystyrene foam is used and the workability is deteriorated by using a plurality of members together. Further, it is considered to use corrugated cardboard as the cushioning material, but the cushioning property is lower than that of styrofoam, which is not preferable. For this reason, there has been a demand for a plastic package that is not bulky and is not easily damaged even when stored in a corrugated cardboard box (without using other cushioning material) like a conventional polystyrene foam.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and in a plastic packaging body having a plurality of storage portions for storing flat display elements, (EN) Provided is a package having a stepped portion for holding a space at the time of stacking and a brim portion protruding to the outside with a width of 10 mm to 50 mm.

Further, each of the accommodating portions for accommodating the flat panel display element has a central portion which is higher than a peripheral portion to form a pedestal portion, a peripheral portion of which is a groove portion and concave portions at four corners. And a communication groove for communicating with an adjacent storage portion is formed on at least one side of the packaging body.

The package of the present invention can be easily molded by press molding a plastic sheet, can be housed in a cardboard box without using any other cushioning material, and can be handled in the same manner as a conventional Styrofoam package. For example, even if a cardboard box that hits the outer box is impacted by being dropped during handling, the liquid crystal display element itself housed inside is less likely to be damaged.

The present invention will be described with reference to the drawings. FIG. 1 is a plan view showing the basic structure of the package of the present invention. Figure 2
FIG. 4 is a partially enlarged cross-sectional view in which the left side portion of the AA plane is enlarged.

In FIGS. 1 and 2, 1 is a package, 2 is a storage portion for a display element, 3 is a brim portion having a cushioning effect, 4
Indicates a stepped portion. This package can be easily manufactured by processing a plastic sheet by press molding. In the case of press molding, it cannot be perpendicular to the height direction, but is inclined. If you try to illustrate this accurately,
Since it becomes too fine, this inclined surface is hardly shown, but actually it is an inclined surface as shown in FIG. Of course, when forming by injection molding or casting, it may be a vertical surface.

This package has a brim 3 at the periphery. The collar portion may be formed in a sheet shape at the four corners of the package. Of course, it is also possible to form a fluff part near the central part of the side or around the entire circumference. However, Figure 1
As described above, it is easier to insert or remove the collar into the outer box by forming the collar at the four corners and not providing the collar at the center of the side. The brim portion is provided so as to project outside by about 10 to 50 mm in width.

In the present invention, the size of the package on the plane is about several tens cm square. For example, it is about 40 cm × 50 cm. Assuming that a 3 cm wide brim is formed at each of the four corners, a 4 x 4 storage unit will be formed as shown in Fig. 1.
A display element with a size of mm x 60 mm can be accommodated.

In practice, the size of the storage portions is determined from the vertical and horizontal dimensions of the display element to be stored, and the distance between the storage portions and the width of the peripheral portion and the width of the collar portion are determined. Therefore, depending on the size of the display element, the number of storage units is about 2 to 100. This number is a guideline and is not limited to this range.

This package is used by stacking. For this reason, by forming the brim portion in this way, a structure in which ten to several tens of thin sheets are projected when stacked. Although the cushioning effect is not so great when only one package is provided, the cushioning property against impact is significantly improved by adopting such a laminated structure. As a result, when an impact such as dropping the outer box is received, the display element housed inside is less likely to be damaged.

For the cushioning action of the collar portion of this package, it is preferable that the collar portions are arranged at appropriate intervals.
That is, a sufficient cushioning effect cannot be expected in the case of only one package or in a situation where the intervals are several cm apart. Normally, the pitch of the brim is set to about 3 mm to 20 mm. In particular,
If this pitch exceeds 10 mm, the width of the collar will also be 20 mm.
The above is preferable.

It is preferable that the flange has rounded corners to prevent injury during handling. Further, the tip of the brim can be bent upward.

The step portion 4 is used to reinforce the peripheral portion and may be designed as appropriate. In addition, this stepped portion is
As shown in B, by forming the step portions by shifting the position of the step portion to the left or right or the top and bottom (not the top and bottom in FIG. 2), the left and right sides of the figure are exchanged every other sheet, and the steps shown in FIG. The intervals (pitch) of the packages can be set to the intervals indicated by H ₀ of.

If the position of the step is not shifted in the horizontal direction or the vertical direction in FIG. 1, the intervals between the packages when the packages are stacked are the contact of the inclined surfaces or the bottom of the accommodating part and the display element. Determined by contact with the upper surface of. In the case of the former, the intervals become uneven and the left and right are inclined. Further, in the latter case, pressure is applied to the display element itself, and the surface of the display element is rubbed against the packaging body due to vibration, so that a problem that scratches are likely to occur is likely to occur.

For this reason, it is preferable that the packaging bodies in which the positions of the step portions are alternately displaced are stacked to keep the spacing constant. At this time, as described above, by forming the stepped portions that are misaligned in one package, it is possible to keep the interval constant only by replacing the left and right sides. That is, only one type of press is required, and the productivity is improved, and the storage space can be reduced by storing the press without replacing the left and right. Furthermore, since only one type of package is used during the packaging work, the work is extremely easy and the workability is good.

FIG. 3 and FIG. 4 are a plan view and a BB cross-sectional view showing a more preferable structure of the storage portion of the package of the present invention. In FIG. 3 and FIG. 4, 11 is a repeating unit including one storage part of the package, 12 is a pedestal part of the storage part, 13 is a groove part around the storage part, 14 is a concave part at four corners of the storage part, and 15 is adjacent. It shows a communication groove that connects to the storage unit that is used. Note that in FIG. 4, the vertical surface is shown as a vertical surface instead of as an inclined surface for the sake of easy understanding.

When the plastic sheet is press-molded, the peripheral portion of the folded storage portion is as shown in FIG.
It tends to be slightly above the bottom surface, and when a display element is placed, it is likely to be supported only by the peripheral portion of the display element. For this reason, impact is easily applied to the peripheral portion, and the damage is relatively likely to occur. On the other hand, as shown in FIG. 4, the display element is held by the surface by forming the groove portion 13 in the peripheral portion and placing the bottom surface of the storage portion as the pedestal portion 12 and raising it.

As a result, the peripheral portion of the display element, which is susceptible to impact, can be floated, and damage to the display element can be reduced. Further, the groove portion also serves as a rib to reinforce the storage portion. Further, it is easy to take out the display element when taking it out from the package later.

Further, recesses are formed at the four corners so that the corners of the weakest display element do not come into direct contact with the package. This is especially important in the case of a display element using a glass substrate such as a liquid crystal display element. In many cases, the glass substrate has fine cracks at the edges when it is cut, and even if chamfered, some of the cracks remain. This crack easily grows when it receives an impact.

When the display element receives an impact from the package,
Since the surface (bottom surface) receives a considerable area, the impact per unit area is small. Next, since the area (side length × substrate thickness) on each side (side surface) that receives a shock is smaller than that on the bottom surface, the shock per unit area is large.
If this is a corner (four corners), it will originally be sharp at the point where the two cutting lines intersect and will be impacted at the point, so the cracks can expand at once and even break. .

Therefore, as in the examples of FIGS. 3 and 4, the four corners of the storage section are made to be recesses so that the corners of the display element do not collide with the package, so that the display element is not damaged. Can be reduced. The concave portions at the four corners may be concave portions that project outward from the side portions. Generally, it may be substantially circular.

Further, according to the present invention, it is preferable to provide at least one communication groove 15 connecting the two adjacent storage portions with each other. This is to facilitate air escape when stacking the packages. In particular, as shown in FIG. 4, it is preferable to provide it on the long side between the adjacent storage portions because it is easy to insert a finger when the display element is taken out later.

The package of the present invention can be easily manufactured by press-molding a plastic sheet of usually about 0.4 mm to 2.0 mm. This thickness may be determined in consideration of the material of the plastic, the size of the package, the size of the squeeze, and the like. Also,
A molding method other than press molding, such as an injection molding method or a casting molding method, can also be used.

Although various known materials can be used as the material of the plastic, polystyrene is the most suitable in consideration of waste problems, ease of molding, price and the like.

As the display element which can be stored in this package, various display elements such as a liquid crystal display element, an electrochromic display element, an electrophoretic display element, a PLZT element and a fluorescent display element can be used. In particular, it is suitable for a flat type liquid crystal display element. Specifically, the periphery is sealed with a sealing material between substrates such as glass and plastic, and liquid crystal is sealed inside.

Further, in the case where the display element has a connecting pin or the like and the display element is not flat, it is necessary to partially change the structure of the package. In particular, in the case of a type in which the pins are projected in a direction not parallel to the surface of the display element, the structure in which the accommodating portion is flat as shown in FIGS.

For example, when the pins project vertically from the ends of the display element, the storage portion itself is formed to have a triangular cross section, and the ends of the pins of the display element come on the mountain. To place. That is, the display element may be designed so as to be supported on the left side inclined surface of the storage portion, and the pin may be designed to be supported on the right side inclined surface.

In addition to the structure described above, the package of the present invention is provided with a rib for reinforcement, a model number, a recycle mark, a lot number, a manufacturing date, etc. within a range that does not impair the effects of the structure of the present invention. It may be molded and attached at the same time.

[0035]

The package of the present invention will be described below with reference to the example of FIG. The package of FIG. 1 can store 16 display elements in the storage portion. Therefore, first, 16 display elements are stored. Next, replace the left and right sides of the same package (rotate 180 ° around the center) and stack.
After that, 16 display elements are stored in the storage section. Then, the same packages are stacked and stored and loaded in the same manner.

[0036] The sheets are stacked in this manner and then stored in a cardboard box. In this stored package, the inner surface of the cardboard box is in contact with the collar of the package, and the collar acts as a cushioning material, so that even if a shock is applied to the box, the display element Less likely to be damaged.

[0037]

【Example】

Example 1 A package having a structure as shown in FIG. 1 and individual storage parts having a structure as shown in FIG. 3 was manufactured by press-molding a 0.7 mm-thick polystyrene sheet. However, the number of storage parts was set to 6 in the vertical direction and 4 in the horizontal direction, and 24 in one package. External dimensions are 436 mm x 3
The size of the collar is 06 mm, the width of the collar is 18 mm, and the length is 70 mm. As shown in Figs. 3 and 4, the storage part has a groove with a width of 2 mm and a depth of 1 m.
At the four corners, approximately circular recesses with a diameter of about 5 mm were formed. The inclination of the surface from the vertical direction by press forming was 7 °.

Further, a communication groove having a width of 20 mm was formed between all the adjacent storage portions on the long side, and a communication groove having a width of 10 mm was formed at only two locations on the short side. 5mm high around this package
As shown in FIG. 1, the stepped portion was formed by slightly shifting the position on the left and right. In addition, a model number, a recycle mark, and a material indication were stamped at the same time as molding on a part of the bottom of the storage part.

A liquid crystal display element using 24 glass substrates was housed in the housing part of this package. Next, swap the same package on the left and right (turn 180 ° around the center)
Overlaid, 24 liquid crystal display elements were stored in the storage section.
Then, the same packages were stacked and stored and loaded in the same manner, and 20 packages were stacked, and another package was used as a lid. The stacked packages (containing a total of 480 liquid crystal display elements) were placed in a cardboard box.

The inner surface of the cardboard box containing this package was in contact with the collar of the package. This cardboard box was subjected to a drop test from a height of 80 cm. As a result, the stored liquid crystal display element was not damaged. When a similar test was conducted using a package without a brim, the liquid crystal display element was damaged.

[0041]

The package of the present invention can easily form a plastic sheet by press molding, can be housed in a cardboard box without using other cushioning material, and is similar to a conventional polystyrene foam package. Can handle. In particular, even if the cardboard box that hits the outer box is impacted by being dropped during handling, the liquid crystal display element itself housed inside is less likely to be damaged.

The package of the present invention is used by stacking.
For this reason, the collar portion has a structure in which ten or more to several tens of thin sheets are projected when stacked, and the shock absorbing property is significantly improved.

Further, by forming the stepped portions which are displaced from each other in one package, the intervals can be kept constant only by exchanging the left and right sides. In this case, only one type of press is required, which improves productivity, and the storage space can be reduced by storing the press without replacing the left and right. Furthermore, since only one type of package is used during the packaging work, the work is extremely easy and the workability is good.

Further, by forming a groove in the peripheral portion of the storage section,
By placing the bottom surface of the storage part as a pedestal part and raising it, the display element is held by the surface, the peripheral part of the display element which is susceptible to impact can be floated, and damage to the display element can be reduced. it can. Further, the groove portion also serves as a rib to reinforce the storage portion. Further, it is easy to take out the display element when taking it out from the package later.

Further, since the recesses are formed at the four corners of the accommodating portion, the corners of the weakest display element are prevented from directly touching the package, and the risk of breakage can be further reduced. The present invention can be applied in various ways in the future without departing from the effects of the present invention.

[Brief description of drawings]

FIG. 1 is a plan view showing a basic structure of a package of the present invention.

FIG. 2 is a partially enlarged cross-sectional view of the AA plane of FIG.

FIG. 3 is a plan view showing a preferred example of a storage portion of the package of the present invention.

FIG. 4 is a cross-sectional view taken along the line BB of FIG.

[Explanation of symbols]

 1: Packaging 2: Storage 3: Collar 4: Step

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Atsushi Tsuchida 2-32 Higashi Zao, Nagaoka City, Niigata Prefecture Nippon Seiki Co., Ltd.

Claims (2)

[Claims] 1. A plastic wrapping body having a plurality of storage portions for storing flat panel display elements, and a step portion for holding a stacking interval in the peripheral portion and an outer portion having a width of 10 mm to 50 mm. A package having a protruding brim. 2. The package according to claim 1, wherein each of the accommodating portions for accommodating the flat display element has a central portion which is higher than a peripheral portion to form a pedestal portion, and the periphery thereof is a groove portion. The package is characterized in that recesses are formed at the four corners, and communication grooves for communicating with adjacent storage parts are formed at least in one side.