JP5115843B2 - Glass substrate packing box - Google Patents

Description

  The present invention relates to a glass substrate packing box for packing a plurality of glass substrates in a state where they are arranged in parallel in a vertical posture at intervals.

  As is well known, high cleanliness is often required for various glass substrates in recent years, as typified by glass substrates for flat panel displays such as liquid crystal displays, plasma displays, electroluminescence displays, and field emission displays. . Therefore, when packing these glass substrates, a sealed type glass plate packaging box is used from the viewpoint of maintaining the cleanliness of the glass substrate, such as preventing a foreign matter such as dust from adhering to the glass substrate. There is a case.

  As this type of glass plate packing box, for example, as disclosed in Patent Document 1 below, a box body (box body) having an open upper end, and the upper end opening of the box body are fitted to the box body. And a lid that closes, and holds a plurality of glass substrates arranged in parallel in a vertical position in an internal space formed by fitting the lid to the box body.

Specifically, the box body is provided with a glass substrate holding portion for holding the lower side and both sides of each glass substrate, and the glass substrate is inserted into a plurality of holding grooves formed in the glass substrate holding portion. By doing so, the peripheral part of a glass substrate is hold | maintained. Similarly, the lid is also provided with a glass substrate holding portion having a plurality of holding grooves, and holds the upper side of each glass substrate, or the upper side and both sides.
JP 2004-51131 A

  By the way, as disclosed in the above-mentioned Patent Document 1, the box body and the lid are filled with a polyolefin-based bead containing a foaming agent or its primary foam in a mold and heated at a predetermined temperature. Many resin molded products molded by the so-called bead foaming method are used. This is because the resin molded product molded by the bead foaming method is lighter and more cushioning than the resin molded product molded by injection molding, and the cost of the mold and the resin itself is low. .

  However, on the other hand, the box body and lid molded by the bead foaming method have the disadvantage that the dimensional accuracy is poor compared to those molded by injection molding, and one or both of the box body and lid In some cases, the height-direction dimension becomes smaller than a predetermined dimension. Therefore, in such a case, before fitting the lid to the box body, the upper side of the glass substrate is in contact with the glass holding portion of the lid, and the lid is in a state of floating with respect to the box body. A situation may occur in which the two cannot be completely fitted. That is, a situation may occur in which the lid is supported while being lifted by the glass substrate.

  And in recent years, from the viewpoint of improving storage efficiency, when using such a sealed glass substrate packaging box, a form in which the glass substrate packaging boxes are stacked and stored in a state where the glass substrate is packed inside has been adopted. Yes. Therefore, as described above, when the lid is floating with respect to the box body and the two are not completely fitted, the load of the upper glass substrate packing box is loaded in the lower glass substrate packing box. The glass substrate directly acts on the glass substrate, and the glass substrate may be damaged. And when such a situation occurs, glass pieces and glass powder are scattered around the damaged glass substrate, and the glass substrate that has not yet been damaged is newly damaged or damaged, The situation of adhering to the glass substrate is caused. Therefore, if even one glass substrate is damaged, a fatal problem that all glass substrates in the packaging box must be handled as defective products arises.

  In view of the above circumstances, the present invention provides a lid for the box body even when a resin molded product with poor dimensional accuracy molded by a bead foaming method or the like is used as the box body and the lid. It is a technical object to provide a glass substrate packaging box that can be reliably fitted and can be stacked without undue stress acting on the glass substrate.

  The first glass substrate packaging box according to the present invention, which was created to solve the above problems, includes a box body having an upper end opened, and a lid body that is fitted to the box body and closes the upper end opening. The plurality of glass substrates are vertically spaced by a plurality of holding grooves of the glass holding portion provided in the box body and a plurality of holding grooves of the glass holding portion provided in the lid body. In the glass substrate packaging box that is placed and held in parallel, a spacer having higher elasticity than the glass holding part is interposed between the lid and the glass holding part arranged on the lid. It is characterized by that.

  According to such a configuration, even if the dimensional accuracy in the height direction of the box body or the lid body is poor, the lid body is removed after the upper portion of the glass substrate contacts the holding groove of the glass holding portion of the lid body. When pushed further into the box body side, the spacer itself, which has higher elasticity than the glass holder, compresses and deforms, so the lid can be securely fitted to the box body without applying unnecessary stress to the glass substrate. Is possible. That is, it is possible to prevent a situation in which the lid is supported on the upper side of the glass substrate in a state where the lid is floated from the box body without completely fitting the lid and the box body. Therefore, even when the glass substrate packaging box with the glass substrate packed inside is stacked, the ratio at which the load of the upper glass substrate packaging box acts on the glass substrate packed inside the lower glass substrate packaging box Can be reliably reduced, so that breakage of the glass substrate can be reduced as much as possible.

  In the above structure, it is preferable that the spacer is formed of a low repulsion material.

  In this way, when the lid is fitted to the box body and the spacer is compressed and deformed, the ratio of the spacer expanding to the glass substrate side by the elastic restoring force can be reduced. Therefore, the ratio of the stress acting on the glass substrate by the spacer can be more reliably reduced. In addition, by forming the spacer with a low repulsion material, the spacer has excellent shock absorption and pressure dispersibility, so even if an impact is applied when stacking glass substrate packaging boxes, etc. The influence hardly occurs on the glass substrate, which is very advantageous from the viewpoint of preventing the glass substrate from being damaged.

  The second glass substrate packaging box according to the present invention, which was created to solve the above problems, includes a box body having an upper end opened, and a lid body that is fitted to the box body and closes the upper end opening. The plurality of glass substrates are vertically spaced by a plurality of holding grooves of the glass holding portion provided in the box body and a plurality of holding grooves of the glass holding portion provided in the lid body. In the glass substrate packaging box that is placed and held in parallel, the glass holding portion disposed on the lid body is crushed by the upper side of the glass substrate and elastically deformed into a concave shape due to the load from above. It is characterized by being configured to form a plurality of holding grooves.

  According to such a configuration, the glass holding portion is crushed by the upper side of the glass substrate and elastically deformed into a concave shape, and the portion elastically deformed into the concave shape becomes the holding groove. Even when the dimensional accuracy in the direction is poor, the groove depth of the holding groove (the dimension from the crest to the trough of the groove) is adjusted corresponding to the deviation of the dimension. Therefore, the lid can be reliably fitted to the box body. Therefore, even when the glass substrate packaging boxes packed inside the glass substrate are stacked, the ratio of the weight of the upper glass substrate packaging box acting on the glass substrate packed inside the lower glass substrate packaging box Is reliably reduced, the damage of the glass substrate can be reduced as much as possible.

  In this case, it is preferable that the glass holding portion provided on the lid is formed of a low repulsion material.

  In this way, the effects described in the paragraph [0012] already described can be similarly enjoyed.

  The third glass substrate packing box according to the present invention, which was created to solve the above problems, includes a box body having an upper end opened, and a lid body that is fitted to the box body and closes the upper end opening. The plurality of glass substrates are vertically spaced by a plurality of holding grooves of the glass holding portion provided in the box body and a plurality of holding grooves of the glass holding portion provided in the lid body. In a glass substrate packaging box that is placed and held in parallel, the glass holding portion provided in the lid is characterized by being formed in advance from a low-rebound material having a plurality of holding grooves.

  According to such a configuration, even if the dimensional accuracy in the height direction of the box body or the lid body is poor, the lid body is removed after the upper portion of the glass substrate contacts the holding groove of the glass holding portion of the lid body. If the glass body is further pushed into the box body, the glass holding portion formed of the low repulsion material is compressed and deformed, so that the lid can be securely fitted to the box body. That is, it is possible to prevent a situation in which the lid is supported on the upper side of the glass substrate in a state where the lid is floated from the box body without completely fitting the lid and the box body. Therefore, even when the glass substrate packaging boxes packed inside the glass substrate are stacked, the ratio of the weight of the upper glass substrate packaging box acting on the glass substrate packed inside the lower glass substrate packaging box Is reliably reduced, the damage of the glass substrate can be reduced as much as possible. Moreover, the effects described in paragraph [0012] derived from the low repulsion material can be enjoyed in the same manner.

  Said structure WHEREIN: It is preferable that the said low-resilience material is a flexible polyurethane foam, and from a viewpoint of shock absorption especially, among the load-resistant flexible polyurethane foams described in JIS K6401: 2005, the first type LB or It preferably belongs to the second type of LM.

  As described above, according to the present invention, even when a resin molded product with poor dimensional accuracy molded by a bead method or the like is used as the box body and the lid, the box body and the lid are securely fitted. And can be stacked without applying excessive stress to the glass substrate.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a perspective view schematically showing a glass substrate packaging box 1 according to the first embodiment of the present invention. The glass substrate packaging box 1 includes a bottomed rectangular tube-shaped box body 2 having an open upper end, and a covered rectangular tube-shaped lid body that is fitted to the upper end portion of the box body 2 and closes the opening. 3 is provided. The box body 2 and the lid body 3 are formed of a polyolefin resin (for example, a copolymer of ethylene and propylene), and a bead foaming method is used as a molding method thereof.

  Inside the box body 2, as shown in FIG. 1 and FIGS. 2 (a) and 2 (b), a glass holding portion 4 that holds the lower side of the glass substrate G in a vertical posture is disposed on the bottom surface. A pair of glass holding portions 5 that hold both sides of the glass substrate G are respectively provided on opposite side surfaces. Each of the glass holding portions 4 and 5 is formed with holding grooves 4a and 5a along the peripheral edge of the glass substrate G. By inserting the glass substrate G into the holding grooves 4a and 5a, the glass substrate The peripheral edge of G is held. The glass holding portions 4 and 5 are formed of the same polyolefin-based foamed resin as the box body 2. For example, the glass holders 4 and 5 can be integrally formed with the box body 2 or can be detached from the box body 2 after being separately molded. Installed to fit.

  In this embodiment, a plurality of glass holding portions 4 that hold the lower side of the glass substrate G are arranged along the lower side of the glass substrate G (three at equal intervals in the illustrated example). The lower side of the substrate G is held intermittently.

  On the other hand, similarly to the box body 2, a glass holding portion 6 in which a plurality of holding grooves 6 a that hold the upper side of the glass substrate G is formed is also provided inside the lid body 3. A spacer 7 is interposed between the upper surface of the glass holding portion 6 and the lower surface of the lid 3 so as to be in contact with both. The spacer 7 is formed of a low resilience material having elasticity higher than that of the glass holding portion 6, specifically, a flexible polyurethane foam having a thickness of about 20 mm. As the flexible polyurethane foam, those belonging to the first type LB or the second type LM among the load-resistant soft polyurethane foams described in JIS K6401: 2005 are suitable. If this is a load-bearing flexible polyurethane foam belonging to the first type LB or the second type LM, the impact resilience is about 15% or less (JIS K6400-3), and the impact absorption is excellent. Depending on the reason.

  The spacer 7 and the glass holding part 6 are fixed by adhesion or the like, and the spacer 7 and the lid 3 are detachably attached by male and female surface fasteners 8 attached to both.

  In this embodiment, a plurality of glass holding portions 6 that hold the upper side of the glass substrate G are arranged along the upper side of the glass substrate G (three at equal intervals in the illustrated example). The upper side of the substrate G is intermittently held. At this time, the spacers 7 may be divided so as to support the glass holding portions 6 respectively.

  Next, a glass substrate packaging procedure using the glass substrate packaging box 1 configured as described above will be described.

  First, as shown in FIG. 3 (a), both sides of the vertical glass substrate G are inserted into the holding grooves 5 a of the glass holding part 5 inside the box body 2, and the lower side is the glass holding part 4. Until it is inserted into the holding groove 4a. The same procedure is repeated for the other glass substrates G, and a plurality of glass substrates G are accommodated in the box body 2 in a state of being arranged in parallel in a vertical posture.

  Next, as shown in FIG. 3 (b), the holding groove 6 a of the glass holding part 6 having the spacer 7 fixed on the upper surface is formed on the upper side of the plurality of glass substrates G accommodated inside the box body 2. Fit. If it does in this way, when fitting holding groove 6a of glass holding part 6 on the upper side of glass substrate G, lid 3 does not become obstructive, and work can be carried out while checking the fitting state. Since it can do, the attachment operation | work of the glass holding | maintenance part 6 can be performed efficiently.

  And after fitting the upper side of each glass substrate G in this way into the holding groove 6a of the glass holding part 6, as shown in FIG.3 (c), the cover body 3 is covered on the spacer 7, and FIG. The surface fastener 8 of the lid 3 is bonded to the surface fastener 8 of the spacer 7 shown in 2 (b), and the spacer 7 and the lid 3 are coupled to each other. In this way, when taking out the glass substrate G from the inside of the glass substrate packaging box 1, the spacer 7 and the glass holding portion 6 can be removed at the same time simply by pulling the lid 3 upward. Extraction work can be performed efficiently.

  On the other hand, the box body 2 and the lid 3 molded by the bead foaming method have advantages such as light weight and excellent cushioning properties, but have poor dimensional accuracy, and therefore one or both of the box body 2 and the lid 3. There may be a case where the height direction dimension becomes smaller than a predetermined value. In such a case, the lid 3 is in a floating state with respect to the box body 2. That is, if no measures are taken in this state, the lid 3 is supported in a state of being lifted by the glass substrate G. Therefore, when the glass substrate packaging box 1 is stacked up and down, the lower glass substrate packaging box 1 There is a risk that the glass substrate G packed in the above will be damaged by the load of the upper glass substrate packing box 1.

  Therefore, in order to cope with such a problem, in the present embodiment, the spacer 7 is formed of a flexible polyurethane foam having higher elasticity than the glass holding portion 6 as described above. That is, as shown in FIG. 3C, when the lid 3 is further pushed down from the state in which the lid 3 is lifted with respect to the box body 2, the spacer 7 itself is compressed and deformed. ), (B), the lid 3 can be securely fitted to the box body 2. Therefore, even when another glass substrate packaging box 1 in which the glass substrate G is packaged is stacked and stored on the glass substrate packaging box 1 in which the glass substrate G is packaged, the lid of the lower glass substrate packaging box 1 is stored. Since the body 3 and the box body 2 are completely fitted as described above, the load of the upper glass substrate packaging box 1 is directly applied to the glass substrate G packed in the lower glass substrate packaging box 1. It can be prevented from acting.

  In addition, since the spacer 7 is formed of a soft polyurethane foam which is a low-repulsive material, the spacer 7 has excellent shock absorption and pressure dispersibility, and impact is generated when stacking the glass substrate packaging boxes 1. Even if it is added, the effect is less likely to occur in the glass substrate G.

  4 (a) and 4 (b) are enlarged longitudinal sectional views showing a main part of the glass substrate packing box 1 according to the second embodiment of the present invention. The glass substrate packaging box 1 according to the second embodiment is different from the glass substrate packaging box 1 according to the first embodiment described above in that the glass holding unit 6 provided inside the lid 3 is made of low repulsion. The point is that it is made of material. That is, a plate-like low-resilience material (specifically, a flexible polyurethane foam) is detachably attached to the inside of the lid 3 by the surface fasteners 8 and 8. Then, as shown in FIG. 4A, the lid 3 is further pushed down at the stage where the upper side of the glass substrate G arranged in parallel in the vertical posture on the box body 2 comes into contact with the glass holding portion 6. As shown in FIG. 4B, the glass holding portion 6 is crushed by the upper side of the glass substrate G and elastically deformed into a concave shape, and a holding groove 6a is formed at the concavely deformed portion. ing.

  In this way, the thickness of the glass holding portion 6 and the groove depth of the holding groove 6a are automatically adjusted according to the downward pressing amount of the lid 3, so that the box as described above. Even when the height direction dimensions of the main body 2 and the lid body 3 deviate from the predetermined dimensions, the lid body 3 can be securely fitted to the box body 2. At this time, the glass holding part 6 may be divided | segmented in the direction along the upper side of the glass substrate G in the state which hold | maintained the upper side of the arranged glass substrate G. FIG.

  In addition, this invention is not limited to said embodiment at all, In the range which does not deviate from the summary of this invention, it can implement with a various form. For example, in the first and second embodiments, a low repulsion material (specifically, flexible polyurethane foam) is laid under the glass holding portion 4 provided on the bottom surface of the box body 2 or glass holding. The portion 4 itself may be formed of a low repulsion material.

  Moreover, although the said 1st, 2nd embodiment demonstrated the case where only the upper side of the glass substrate G was hold | maintained by the glass holding part 6 of the cover 3, the glass which hold | maintains both sides of the glass substrate G in addition A holding unit may be separately provided on the lid 3.

  Furthermore, in the second embodiment, the case where the holding groove 6a is formed later by deformation of the glass holding unit 6 has been described, but of course, the holding groove 6a may be formed in advance.

It is a perspective view shown in the glass substrate packing box concerning a 1st embodiment of the present invention. (A) is the longitudinal cross-sectional view cut | disconnected according to the AA line of FIG. 1, (b) is the longitudinal cross-sectional view cut | disconnected according to the BB line of FIG. (A)-(c) is a figure which shows the procedure which packs a glass substrate in the glass substrate packing box which concerns on 1st Embodiment in order. It is a longitudinal cross-sectional view which expands and shows the principal part of the glass substrate packaging box which concerns on 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Glass substrate packing box 2 Box body 3 Lid body 4, 5, 6 Glass holding part 7 Spacer 8 Surface fastener G Glass substrate

Claims (3)

A box body having an upper end opened; and a lid body that fits into the box body and closes the upper end opening; In the glass substrate packaging box that holds a plurality of glass substrates in a state of being arranged in parallel at intervals in a vertical posture by a plurality of holding grooves of the glass holding portion deployed in the body,
And the lid, between the glass holding section deployed in said top, Rutotomoni is interposed a spacer formed elastic at high foam material than the glass holding section,
The glass substrate packaging box , wherein the spacer is detachably attached to the inner surface of the lid by a surface fastener in a state of being fixed to the glass holding portion . The foam material, a glass substrate packing box according to claim 1 is a flexible polyurethane foam. The glass substrate packaging box according to claim 1 or 2, wherein the box body and the lid are molded by a bead foaming method.

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