JP7746800B2 - Pallets and glass packaging - Google Patents

Description

This disclosure relates to pallets and glass packaging.

Glass plates are transported in a stack to improve transport efficiency. If adjacent glass plates come into contact with each other, scratches will occur. For this reason, slip sheets are placed between adjacent glass plates (see, for example, Patent Document 1).

Patent Document 2 discloses the use of thread-like spacers instead of slip sheets as spacers to be placed between glass sheets. Unlike slip sheets, thread-like spacers contact only part of the underside of the upper glass sheet, rather than the entire surface.

JP 2017-186729 A Japanese Patent Application Laid-Open No. 2007-230610

The thread-like spacers only contact part of the underside of the upper glass pane, not the entirety of it. This can cause the upper glass pane to bend under its own weight and come into contact with the lower glass pane or pallet.

Conventionally, thread-like spacers have been used for relatively thick glass plates, and the deflection of the glass plate is negligible, so the occurrence of scratches due to the deflection of the glass plate has not been considered as an issue.

One aspect of the present disclosure provides technology that reduces the occurrence of scratches caused by bending of glass sheets when thread-like spacers are used.

A pallet according to one aspect of the present disclosure includes a mounting table on which a glass laminate is placed, which includes glass plates having main surfaces and thread-like spacers in contact with the main surfaces of the glass plates in an alternating pattern, and a support body that supports and redirects the thread-like spacers outside the main surfaces of the glass plates when viewed from the Z-axis direction perpendicular to the main surfaces of the glass plates.

According to one aspect of the present disclosure, the support can prevent the thread-like spacers from shifting position on the main surface of the glass plate. As a result, the deflection of the glass plate can be maintained constant, and the occurrence of scratches caused by the deflection of the glass plate can be prevented.

FIG. 1 is a side view showing a glass package according to one embodiment. FIG. 2 is a view of the glass package of FIG. 1 as seen from the Z-axis direction. FIG. 3 shows a first modified example of the column of FIG. FIG. 4 shows a second variant of the column of FIG. FIG. 5 shows a third variant of the column of FIG. FIG. 6 shows a fourth variant of the column of FIG. FIG. 7 is a diagram illustrating a method for manufacturing a glass laminate according to one embodiment. FIG. 8 is a diagram showing a first modification of the manufacturing method shown in FIG. FIG. 9 is a diagram showing a second modification of the manufacturing method shown in FIG. FIG. 10 is a diagram showing an example of a ring-shaped recess, where (A) is a diagram seen from the X-axis direction, and (B) is a diagram seen from the Z-axis direction. FIG. 11 is a diagram showing a first example of use of the ring-shaped recess. FIG. 12 is a diagram showing a second example of use of the ring-shaped recess. FIG. 13 is a diagram showing a third example of use of the ring-shaped recess. FIG. 14 is a diagram showing a fourth example of use of the ring-shaped recess. FIG. 15 is a diagram showing an example of a crescent-shaped recess, where (A) is a diagram seen from the X-axis direction, and (B) is a diagram seen from the Z-axis direction. FIG. 16 is a diagram showing a first example of use of the crescent-shaped recess. FIG. 17 is a diagram showing a second example of use of the crescent-shaped recess. FIG. 18 shows a third example of use of the crescent-shaped recess. FIG. 19 is a diagram showing a fourth example of use of the crescent-shaped recess. FIG. 20 is a diagram showing a fifth example of use of the crescent-shaped recess. FIG. 21 is a diagram showing a sixth example of use of the crescent-shaped recess. FIG. 22 is a diagram showing an example of the relationship between the length L, the interval D1, and the probability of the thread-like spacer breaking. FIG. 23 is a diagram showing a modified example of the glass package of FIG. FIG. 24 is a diagram showing an example of a trapezoidal pillar when viewed in the X-axis direction. FIG. 25 is a diagram showing an example of a column having an inverted trapezoid shape when viewed in the X-axis direction. FIG. 26 is a diagram showing an example of a pillar in the shape of a part of a circle placed on a trapezoid when viewed in the X-axis direction. FIG. 27 is a diagram showing an example of a wave-shaped column when viewed from the X-axis direction. FIG. 28 is a diagram showing an example of a beam connecting adjacent columns.

Embodiments of the present disclosure will be described below with reference to the drawings. Note that identical or corresponding components in each drawing are denoted by the same reference numerals, and descriptions thereof may be omitted. In each drawing, the X-axis, Y-axis, and Z-axis directions are perpendicular to one another, the X-axis and Y-axis directions are parallel to the first main surface 211 of the glass plate 21, and the Z-axis direction is perpendicular to the first main surface 211 of the glass plate 21. In Figures 1, 2, 7 to 9, 11 to 14, 16 to 21, and 23, a dot pattern is applied to the glass plate 21 to highlight it.

A glass package 1 according to one embodiment will be described with reference to Figures 1 and 2. The glass package 1 comprises a glass laminate 2 and a pallet 3 on which the glass laminate 2 is placed. The glass laminate 2 comprises multiple glass sheets 21 stacked in the Z-axis direction and thread-like spacers 22 arranged between adjacent glass sheets 21 in the Z-axis direction or between the glass sheets 21 and the pallet 3.

The glass laminate 2 comprises glass plates 21 and thread-like spacers 22 arranged alternately in the Z-axis direction. The glass plates 21 include a first main surface 211 and a second main surface 212. The first main surface 211 is the lower surface, and the second main surface 212 is the upper surface. The thread-like spacers 22 contact the lower surface of the upper glass plate 21 and the upper surface of the lower glass plate 21 or pallet 3, limiting contact between the upper glass plate 21 and the lower glass plate 21 or pallet 3.

When viewed in the Z-axis direction, the glass plate 21 has, for example, a rectangular shape. The rectangle may include a square. The rectangle may include a shape with chamfered corners. When viewed in the Z-axis direction, the glass plate 21 has a first side 213 and a second side 214 that are parallel to each other, and a third side 215 and a fourth side 216 that are parallel to each other.

When viewed from the Z-axis direction, the direction along the first edge 213 and the second edge 214 is the X-axis direction. When viewed from the Z-axis direction, the direction along the third edge 215 and the fourth edge 216 is the Y-axis direction.

The multiple glass plates 21 included in the glass laminate 2 have, for example, the same shape and dimensions. The number of glass plates 21 included in the glass laminate 2 is not particularly limited, but is, for example, 50 to 800, preferably 120 to 600, and more preferably 140 to 250.

The glass plate 21 is, for example, for use in a display, and more specifically, is a substrate on which a TFT (Thin Film Transistor) or a color filter is formed, or a cover glass. The glass plate 21 may also be a semiconductor wafer such as a silicon wafer, or a carrier substrate to be bonded to a semiconductor chip.

The carrier substrate is, for example, bonded to the semiconductor wafer before the semiconductor wafer is thinned, and reinforces the semiconductor wafer during thinning. After the semiconductor wafer is thinned, the semiconductor wafer and the carrier substrate are separated.

Alternatively, the carrier substrate may be bonded to the multiple semiconductor chips and position them before the multiple semiconductor chips are encapsulated with resin. After the multiple semiconductor chips are encapsulated with resin, the multiple semiconductor chips and the carrier substrate are separated.

Glass plates 21 for displays or carrier substrates are required to have few defects, so there is great significance in applying the technology disclosed herein.

The Young's modulus of the glass plate 21 is, for example, 60 GPa or more and 110 GPa or less, preferably 65 GPa or more and 95 GPa or less, and more preferably 70 GPa or more and 90 GPa or less.

The density of the glass plate 21 is, for example, 2.2 g/cm ³ or more and 3.0 g/cm ³ or less, preferably 2.3 g/cm ³ or more and 2.8 g/cm ³ or less, and more preferably 2.4 g/cm ³ or more and 2.7 g/cm ³ or less.

The thickness of the glass plate 21 is, for example, 2.0 mm or less, preferably 1.2 mm or less, and more preferably 0.6 mm or less. The thickness of the glass plate 21 is preferably 0.05 mm or more, more preferably 0.1 mm or more, and even more preferably 0.3 mm or more.

The dimension of the glass plate 21 in the X-axis direction is, for example, 100 mm or more and 4000 mm or less, preferably 300 mm or more and 3300 mm or less, more preferably 1500 mm or more and 3300 mm or less, and even more preferably 1800 mm or more and 3300 mm or less.

The thread-like spacers 22 are arranged between adjacent glass plates 21 in the Z-axis direction to prevent scratches on the glass plates 21. The thread-like spacers 22 are also arranged between adjacent glass plates 21 in the Z-axis direction and the pallet 3 to prevent scratches on the glass plates 21 and the pallet 3.

The thread-like spacers 22 have linear portions 221 that are tangent to the first main surface 211 of the glass plate 21. Each linear portion 221 crosses the first main surface 211. Each linear portion 221 passes through, for example, the third side 215 and the fourth side 216. Each linear portion 221 extends, for example, in the X-axis direction. Note that, as described below, each linear portion 221 may extend obliquely with respect to the X-axis direction. In any case, multiple linear portions 221 are provided at intervals in the Y-axis direction.

Unlike interleaf paper, the thread-like spacers 22 contact only a portion of the first main surface 211 of the glass plate 21, rather than the entire surface. This prevents foreign matter from adhering to the glass plate 21, improving the quality of the glass plate 21. Because glass plates 21 for displays or carrier substrates require a high level of cleanliness, thread-like spacers 22 are ideal.

Furthermore, unlike slip sheets, the thread-like spacers 22 can be collected and reused after use, thereby conserving resources. The thread-like spacers 22 may be washed before reuse. Washing can remove foreign matter adhering to the thread-like spacers 22.

The thickness of the filamentous spacers 22 is determined appropriately taking into consideration the deflection of the glass plates 21, but is, for example, 50 μm to 2000 μm, preferably 100 μm to 1500 μm, more preferably 200 μm to 1000 μm, and even more preferably 300 μm to 800 μm. The thicker the filamentous spacers 22, the less likely they are to come into contact with the glass plates 21 when they deflect. The thinner the filamentous spacers 22, the more glass plates 21 can be loaded at one time, resulting in better loading efficiency.

The cross-sectional shape of the thread-like spacers 22 may be circular or rectangular. When the cross-sectional shape of the thread-like spacers 22 is rectangular, they can support the glass plate 21 more stably than when they are circular. When the cross-sectional shape of the thread-like spacers 22 is circular, the contact area with the glass plate 21 is smaller than when they are rectangular, which is thought to better prevent foreign matter from adhering to the glass plate 21.

The material of the filamentous spacer 22 is not particularly limited, but may be, for example, natural or synthetic fibers. Specific examples of natural fibers include cotton, linen, silk, and wool. Specific examples of synthetic fibers include rayon, cupra, acetate fiber, polyethylene (PE) fiber, nylon fiber, polyester fiber, polyamide fiber, polyimide fiber, acrylic fiber, polyarylate fiber, polyparaphenylene benzobisoxazole (PBO) fiber, polybenzimidazole (PBI) fiber, polyphenylene sulfide (PPS) fiber, fluorine fiber, and carbon fiber. The filamentous spacer 22 may be a monofilament or multifilament, or may be a twisted yarn made by twisting together multiple threads. It may also be a yarn made by combining multiple types of the above fibers.

The pallet 3 is, for example, a vertical pallet that supports each glass plate 21 at an angle. In this embodiment, the pallet 3 is a vertical pallet, but it may also be a flat pallet. A flat pallet supports each glass plate 21 horizontally.

The pallet 3 includes a mounting table 31 on which the glass laminate 2 is placed. The mounting table 31 has a mounting surface 311 facing the first main surface 211 of the glass sheet 21. The mounting surface 311 is provided at an angle, for example. If the pallet 3 is a flat pallet, the mounting surface 311 is provided horizontally. The pallet 3 may also include a stopper plate 32 against which the diagonally downward end face of the glass sheet 21 abuts. The stopper plate 32 abuts, for example, against the first edge 213 of the glass sheet 21. The stopper plate 32 makes it easy to determine the position of the glass sheet 21. If the pallet 3 is a flat pallet, the stopper plate 32 does not have to be provided.

When the pallet 3 is a flat pallet, the placement surface 311 may be curved concavely along one side. That is, the height of the placement surface 311 may be lower at the center of the side than at both ends of the side. By curving the placement surface 311 concavely in this way, it is possible to prevent the glass plate 21 placed on the placement surface 311 from shifting sideways during transportation.

The pallet 3 may include a base 33 that supports the mounting base 31 and the stopper plate 32. The mounting base 31 and the stopper plate 32 are fixed onto the base 33.

When viewed from the Z-axis direction, the pallet 3 includes pillars 34 that support and redirect the thread-like spacers 22 outside the first main surface 211 of the glass plate 21. In this embodiment, the pillars 34 correspond to the support bodies described in the claims. The pillars 34 are arranged perpendicular to the mounting surface 311 of the mounting table 31. The pillars 34 may also be arranged at an angle to the mounting surface 311, or may be bent midway.

Although not shown, the outer peripheral surface 341 or the top surface 342 of the pillar 34 may have irregularities or holes. The shape of the irregularities is not particularly limited. The outer peripheral surface 341 or the top surface 342 of the pillar 34 may have claws, spheres, disks, branches, or the like.

The thread-like spacers 22 are wrapped around the outer peripheral surface 341 of the pillars 34 and are redirected along the outer peripheral surface 341. The pillars 34 restrain the thread-like spacers 22, preventing them from shifting position. As a result, the deflection of the glass plate 21 can be maintained constant, preventing scratches caused by the deflection of the glass plate 21.

The pillars 34 not only prevent the thread-like spacers 22 from shifting in position, but also prevent the glass plate 21 from shifting in position. Furthermore, the pillars 34 also prevent the glass plate 21 and the thread-like spacers 22 from shifting in position relative to each other. This reduces friction between the glass plate 21 and the thread-like spacers 22, thereby reducing the buildup of static electricity due to friction.

The pillars 34 can also hold down the thread-like spacers 22 attached to the glass plates 21 to prevent them from being lifted up along with the glass plates 21 when the glass plates 21 are lifted up one by one to unpack the glass laminate 2. The glass plates 21 and thread-like spacers 22 can be separated, allowing the glass plates 21 and thread-like spacers 22 to be collected separately.

When viewed from the Z-axis direction, the thread-shaped spacer 22 has a folded portion 222 at one or both ends in the X-axis direction. The folded portion 222 is a portion that is changed in direction by the outer peripheral surface 341 of the pillar 34. When viewed from the Z-axis direction, the pillar 34 has, for example, a semicircular shape, and the folded portion 222 has the shape of a semicircular arc.

When viewed from the Z-axis direction, the thread-like spacer 22 has, for example, a ring-shaped portion 223 composed of two straight portions 221 and two folded portions 222. The ring-shaped portion 223 contacts the underside of the upper glass plate 21 and the upper surface of the lower glass plate 21 or mounting table 31, limiting contact between the upper glass plate 21 and the lower glass plate 21 or mounting table 31. The thread-like spacer 22 has multiple ring-shaped portions 223 spaced apart in the Z-axis direction.

Although not shown, when viewed from the Z-axis direction, the thread-like spacer 22 may have a zigzag portion consisting of three or more straight portions 221 and two or more folded portions 222. Like the ring-shaped portion 223, the zigzag portion also contacts the underside of the upper glass plate 21 and the top surface of the lower glass plate 21 or mounting base 31, thereby limiting contact between the upper glass plate 21 and the lower glass plate 21 or mounting base 31.

When viewed from the Z-axis direction, multiple straight sections 221 are provided at intervals in a desired direction (for example, the Y-axis direction), and the multiple straight sections 221 are provided parallel to one another. According to this embodiment, the pillars 34 can maintain a constant distance D1 between the center lines of adjacent straight sections 221. As a result, the deflection of the glass plate 21 can be maintained constant, and the occurrence of scratches caused by the deflection of the glass plate 21 can be suppressed.

In this embodiment, the spacing D1 is equal, but it may be unequal. The average value of spacing D1 is, for example, 10 mm to 100 mm, preferably 20 mm to 80 mm, and more preferably 40 mm to 50 mm. If the average value of spacing D1 is 100 mm or less, the number of straight portions 221 is large, the load on the straight portions 221 is distributed, and the probability of the thread spacers 22 breaking is low. If the average value of spacing D1 is 10 mm or more, the number of straight portions 221 and the number of pillars 34 are small, which simplifies the installation of the thread spacers 22 and reduces the cost of the pallets 3.

When viewed from the Z-axis direction, multiple pillars 34 are provided at intervals along each of the third edge 215 and fourth edge 216 of the glass plate 21. The pillars 34 are positioned so as not to interfere with the stopper plate 32, and thread-like spacers 22 can be hung from pillar 34 to pillar 34 across the first main surface 211 of the glass plate 21.

As shown in Figure 23, when viewed from the Z-axis direction, multiple pillars 34 may be provided at intervals along each of the first edge 213 and second edge 214 of the glass plate 21. In this case, multiple stopper plates 32 are provided at intervals along the first edge 213 of the glass plate 21. The pillars 34 are arranged between adjacent stopper plates 32. The number and arrangement of the stopper plates 32 are not limited to those shown in Figure 23.

The pillars 34 are provided at intervals along a desired direction (for example, the Y-axis direction). This allows the distance D1 between the center lines of adjacent straight sections 221 in the Y-axis direction to be maintained constant. In this embodiment, the pillars 34 are arranged in a row along the Y-axis direction, but they may also be arranged in a staggered pattern along the Y-axis direction.

The maximum value of the distance D2 between adjacent columns 34 in the Y-axis direction is, for example, 10 mm or more and 200 mm or less. The distance D2 is measured along the Y-axis direction. If the maximum value of the distance D2 between adjacent columns 34 in the Y-axis direction is 10 mm to 200 mm, the maximum value of the distance D1 between the center lines of adjacent straight sections 221 in the Y-axis direction will be 10 mm to 200 mm.

When the maximum value of the distance D2 between adjacent columns 34 in the Y-axis direction is 200 mm or less, the number of straight sections 221 is large, the load on the straight sections 221 is distributed, and the probability of the thread-like spacers 22 breaking is low. When the maximum value of the distance D2 is 10 mm or more, the number of straight sections 221 and the number of columns 34 are small, which simplifies the installation of the thread-like spacers 22 and reduces the cost of the pallet 3.

The pillar 34 is fixed to the mounting base 31, but may be detachable from the mounting base 31. The pillar 34 is fastened to the mounting base 31, for example, with a magnet or a bolt. The pillar 34 and the mounting base 31 may be fitted together via a convex and concave portion. A convex portion may be provided on the pillar 34 and a concave portion on the mounting base 31, or a convex portion may be provided on the mounting base 31 and a concave portion on the pillar 34. The pillar 34 may be fixed to the mounting base 31 via an angle bracket or the like.

If the pillars 34 are removable, the following advantages (1) to (3) can be achieved. (1) By removing the pillars 34, slip sheets can be used in place of the thread spacers 22. (2) The type (including dimensions and shape) or installation position of the pillars 34 can be changed. (3) If the pillars 34 are damaged, they can be replaced.

As described above, the thread-like spacer 22 has a straight portion 221 that is tangent to the first main surface 211 of the glass plate 21. The straight portion 221 crosses the first main surface 211 of the glass plate 21 and extends to the pillar 34. When viewed from the Z-axis direction, the length L of the straight portion 221 from the glass plate 21 to the nearest pillar 34 is, for example, 15 mm or more and 300 mm or less. The length L is measured along the straight portion 221.

If the length L is 15 mm or more, the probability that the thread-like spacers 22 will break due to vibrations during transportation is low. When the glass plate 21 is displaced relative to the column 34 due to vibrations during transportation, the length L fluctuates. When the length L elongates, new tensile stress is generated. The newly generated tensile stress is proportional to the amount of elongation relative to the original length. If the length L is 15 mm or more, the original length is long, so the newly generated tensile stress is small and the probability that the thread-like spacers 22 will break is low. The length L is preferably 20 mm or more, and more preferably 50 mm or more.

If the length L is 300 mm or less, there is little wasted space between the glass plate 21 and the column 34. Therefore, the difference in area between the mounting surface 311 of the mounting table 31 and the first main surface 211 of the glass plate 21 is small, and the mounting table 31 can be made smaller. The length L is preferably 200 mm or less, more preferably 150 mm or less, and even more preferably 100 mm or less.

Referring to FIG. 22 , an example of the relationship between the length L, the spacing D1, and the probability of the filamentous spacers 22 breaking will be described. FIG. 22 shows the results of a vibration test of a glass package 1 placed on a small vibration tester for transportation tests (manufactured by IMV: m120/MA1). The glass package 1 was fabricated by alternately stacking filamentous spacers 22 and glass plates 21 on a mounting table 31, as shown in FIGS. 1 , 2 , and 7 , except that a flat pallet was used instead of a vertical pallet. The glass packages 1 were fabricated under the same conditions except for D1 and L. Each glass package 1 contained 14 glass plates 21. 160 glass plates were placed on each glass package 1 as weights. Each glass plate had an X-axis dimension of 470 mm, a Y-axis dimension of 370 mm, and a Z-axis dimension (thickness) of 0.5 mm. Two types of vibration tests were conducted. In one vibration test, random vibration was performed in the Z-axis direction using a method in accordance with Japanese Industrial Standard JIS Z 0232:2020 (PSD: general road transport as described in Appendix A, effective acceleration value of 5.9 m/ ^s2 (rms), 30 minutes). In another vibration test, periodic vibration was performed in the Y-axis direction periodically (frequency 5 Hz, amplitude 20 mm, acceleration 10 m/ ^s2 , 30 minutes). The random vibration is vibration that simulates an actual transportation environment, while the periodic vibration is vibration that simulates an environment that is harsher than the actual environment (an environment in which the thread-like spacers 22 are more likely to break than in reality).

In Figure 22, the probability of a thread-like spacer 22 breaking is the ratio of the total number of intersections at which a thread-like spacer 22 breaks during a vibration test to the total number of intersections between each thread-like spacer 22 and the periphery of each glass plate 21. Figure 22 shows that the longer the length L, the lower the probability of a thread-like spacer 22 breaking. It also shows that the shorter the distance D1, the lower the probability of a thread-like spacer 22 breaking.

The tensile strength of the pillars 34 is determined by measurement in accordance with ISO 527-1 and 2, and is, for example, 5 N/mm ² or more. If the tensile strength of the pillars 34 is 5 N/mm ² or more, the tilt of the pillars 34 due to the tension of the thread-like spacers 22 is small. The pillars 34 may include, for example, one or more materials selected from the group consisting of polyvinyl chloride, polyethylene, polypropylene, polyester, acrylic, polystyrene, ABS (acrylonitrile-butadiene-styrene copolymer), polyethylene terephthalate, polybutylene terephthalate, polycarbonate, urethane, polyphenylene ether, polyphenylene sulfide, polysulfone, polyetherimide, polyamideimide, aliphatic polyamide, aromatic polyamide, polyacetal, high molecular weight polyethylene, PTFE (polytetrafluoroethylene), PEEK (polyether ether ketone), PVDF (polyvinylidene fluoride), PFA (tetrafluoroethylene-perfluoroether), NBR (acrylonitrile-butadiene rubber), EPDM (ethylene-propylene diene rubber), wood, silicone, silicon carbide, quartz, glass, silicon nitride, aluminum nitride, carbon steel, aluminum, copper, zinc, brass, titanium, magnesium, nickel, stainless steel, zirconia, tungsten, silver, gold, platinum, and palladium.

The outer surface 341 of the pillar 34 is made of a material such as resin. Compared to metal, resin provides better sliding properties for the thread-like spacer 22 and reduces the likelihood of the thread-like spacer 22 breaking. The Mohs hardness of resin is, for example, 4 or less. Unlike metal, resin does not produce dust or rust. Note that the pillar 34 need only contain resin on the outer surface 341 that comes into contact with the thread-like spacer 22; it is not necessary for the interior of the pillar 34 to contain resin.

The surface roughness Ra of the outer peripheral surface 341 of the pillar 34 is, for example, 10 nm or less. The surface roughness Ra is the arithmetic mean roughness Ra as defined in JIS B 0601:2013. If the surface roughness Ra is 10 nm or less, the thread-like spacers 22 have good sliding properties and are less likely to break.

Next, with reference to Figures 2, 3, and 4, the shape of the outer peripheral surface 341 of the pillar 34 when viewed in the Z-axis direction will be described. In this embodiment, the shape of the outer peripheral surface 341 of the pillar 34 when viewed in the Z-axis direction is semicircular as shown in Figure 2, but it may also be semicircular with chamfered corners (see Figure 3), polygonal (see Figure 4), circular, elliptical, sector-shaped, or teardrop-shaped. Circles are easy to obtain or manufacture, and shapes with a notched circle such as a semicircle and a squashed circle such as an ellipse can reduce the installation space for the pillar 34. When viewed in the Z-axis direction, the pillar 34 may also be hollow and cylindrical.

When viewed from the Z-axis direction, it is preferable that the outer peripheral surface 341 of the pillar 34 bends the thread-like spacer 22 into a bent line or curved line of 120° or more. In other words, when viewed from the Z-axis direction, it is preferable that the outer peripheral surface 341 of the pillar 34 does not have any corners where the thread-like spacer 22 comes into contact, where the interior angle θ1 is less than 120°. This is because if an angle where the interior angle θ1 is less than 120° exists, the thread-like spacer 22 is likely to break at that corner. However, the outer peripheral surface 341 of the pillar 34 may have an angle where the interior angle θ2 is less than 120° at a part where the thread-like spacer 22 does not come into contact.

When viewed from the Z-axis direction, it is preferable that the outer surface 341 of the pillar 34 does not have a corner where the thread-like spacer 22 separates, where the interior angle θ3 is less than 120°. For example, as shown in FIG. 3, when viewed from the Z-axis direction, the outer surface 341 of the pillar 34 may have a fillet 343 with a rounded corner where the thread-like spacer 22 separates. This is because if there is a corner where the interior angle θ3 is less than 120°, the thread-like spacer 22 is likely to break at that corner.

When viewed in the X-axis direction (Y-axis direction in the case of Figure 23), the shape of the outer surface 341 of the pillar 34 is a rectangle parallel to the Z-axis as shown in Figure 1 in this embodiment, but it may also be a trapezoid (see Figures 24 and 25), a shape with part of a circle placed on top of a trapezoid (see Figure 26), a wave shape (see Figure 27), or a sector shape, and is not particularly limited. The trapezoid may become thicker from bottom to top as shown in Figure 24, or may become thinner from bottom to top as shown in Figure 25. The wave shape may have multiple constrictions spaced apart in the Z-axis direction as shown in Figure 27.

When transportation times and vibration times are long, it is preferable that the outer surface 341 of the pillar 34 has a rectangular shape when viewed from the X-axis direction (Y-axis direction in Figure 23). The thread-like spacers 22 located below the Nth (N is an integer greater than or equal to 1) glass plate 21 from the top and the thread-like spacers 22 located below the (N+1)th glass plate 21 from the top can be positioned at the same position in the Y-axis direction (X-axis direction in Figure 23). As a result, the weight of the Nth glass plate 21 from the top does not generate a bending moment in the (N+1)th glass plate 21 from the top. This suppresses deflection of the glass plates 21 and prevents contact between the glass plates 21.

When transportation time and vibration time are short, it is preferable that the outer surface 341 of the column 34 has a trapezoidal or wavy shape when viewed from the X-axis direction (Y-axis direction in Figure 23). The filamentous spacers 22 located below the Nth (N is an integer greater than or equal to 1) glass plate 21 from the top and the filamentous spacers 22 located below the (N+1)th glass plate 21 from the top can be positioned at different positions in the Y-axis direction (X-axis direction in Figure 23). As a result, the weight of the Nth glass plate 21 from the top generates a bending moment in the (N+1)th glass plate 21 from the top. As the (N+1)th glass plate 21 from the top bends, the position of the filamentous spacer 22 above it is displaced downward, reducing the thickness of the glass laminate 2. This allows for an increased number of glass plates 21 to be stacked.

Adjacent columns 34 may be connected by beams 35 (see Figure 28). The beams 35 suppress deformation of the columns 34. This allows the columns 34 to be made thinner, reducing the weight of the pallet 3.

Next, the folding of the thread spacer 22 will be described with reference to Figures 2, 5, and 6. Each folding portion 222 connects two adjacent straight portions 221 in the Y-axis direction. In this embodiment, each folding portion 222 is supported by one pillar 34 as shown in Figure 2, but it may also be supported by two pillars 34 as shown in Figure 5, or by three or more (e.g., four) pillars 34 as shown in Figure 6. Although not shown, there may also be pillars that do not support the thread spacer 22.

Next, with reference to Figure 7, a method for manufacturing a glass laminate 2 according to one embodiment will be described. Each thread-like spacer 22 has a plurality of ring-shaped portions 223, each of which is composed of two straight portions 221 and two folded portions 222, spaced apart in the Z-axis direction. The glass laminate 2 is obtained by alternately repeating the formation of the ring-shaped portions 223 and the placement of the glass plates 21 on the mounting table 31. Note that, although each folded portion 222 is supported by a single pillar 34 in this embodiment, it may also be supported by multiple pillars 34 as shown in Figures 5 and 6.

Next, a first variation of the manufacturing method shown in Figure 7 will be described with reference to Figure 8. Each thread-like spacer 22 has a straight portion 221A that contacts the underside of the odd-numbered glass plate 21A from the bottom, a straight portion 221B that contacts the underside of the even-numbered glass plate 21B from the bottom, and a folded portion 222 that connects the two straight portions 221A and 221B.

As shown in Figure 8, when viewed from the Z-axis direction, the two straight line portions 221A, 221B are arranged parallel to each other and spaced apart in the Y-axis direction. As shown in Figure 9, when viewed from the Z-axis direction, the two straight line portions 221A, 221B may also be arranged to intersect at an angle. Each thread spacer 22 has multiple pairs of two straight line portions 221A, 221B spaced apart in the Z-axis direction.

In this modified example, the glass laminate 2 is obtained by repeatedly forming the straight portion 221A, placing the glass plate 21A, forming the straight portion 221B, and placing the glass plate 21B in this order on the mounting table 31. Note that, although each folded portion 222 is supported by a single pillar 34 in this modified example, it may also be supported by multiple pillars 34 as shown in Figures 5 and 6.

Next, an example of the recess 344 will be described with reference to Figure 10. The pillar 34 may have a recess 344 on its outer circumferential surface 341. By wrapping the folded portion 222 of the thread-like spacer 22 around the recess 344, it is possible to prevent the thread-like spacer 22 from shifting in the Z-axis direction. The pillar 34 may have multiple recesses 344 spaced apart in the Z-axis direction.

The pillar 34, for example, has first disk portions 345 and second disk portions 346 alternately arranged in the Z-axis direction. When viewed from the Z-axis direction, the center of the first disk portion 345 and the center of the second disk portion 346 coincide. The diameter of the second disk portion 346 is smaller than the diameter of the first disk portion 345. In this case, the shape of the recess 344 when viewed from the Z direction is ring-shaped. The recess 344 is formed around the entire outer periphery of the second disk portion 346.

The spacing D3 between the recesses 344 is equal to the thickness of the second disc portion 346. The spacing D3 between the recesses 344 is set appropriately depending on the manufacturing method of the glass laminate 2. When the glass laminate 2 is obtained using the manufacturing method shown in Figure 7, the sum of the thickness of the second disc portion 346 and the spacing D3 between the recesses 344 is equal to the sum of the thickness of one glass plate 21 and the thickness of the thread-like spacer 22. When the glass laminate 2 is obtained using the manufacturing method shown in Figures 8 and 9, the sum of the thickness of the second disc portion 346 and the spacing D3 between the recesses 344 is equal to the sum of the thicknesses of two glass plates 21 and twice the thickness of the thread-like spacer 22.

Next, with reference to Figures 11 to 14, an example of using the ring-shaped recess 344 will be described. Each folded portion 222 may connect two straight portions 221, 221 that contact the underside of the same glass plate 21, as shown in Figures 11 and 12, or may connect two straight portions 221A, 221B that contact the underside of different glass plates 21A, 21B, as shown in Figures 13 and 14.

Each folded portion 222 may be supported by a single pillar 34, as shown in Figures 11 and 13, or by multiple pillars 34, as shown in Figures 12 and 14.

Next, with reference to Figure 15, another example of the recess 344 will be described. The shape of the recess 344 when viewed from the Z-axis direction may be crescent-shaped. For example, when viewed from the Z-axis direction, the center of the first disk portion 345 and the center of the second disk portion 346 are eccentric in the Y-axis direction. The diameter of the second disk portion 346 is the same as the diameter of the first disk portion 345. In this case, the pillar 34 has recesses 344 formed on one side in the Y-axis direction and recesses 344 formed on the opposite side in the Y-axis direction, alternately arranged along the Z-axis direction. The recesses 344 are formed on part of the outer periphery of the first disk portion 345 and part of the outer periphery of the second disk portion 346.

Next, with reference to Figures 16 to 21, an example of using the crescent-shaped recess 344 will be described. Each folded portion 222 may connect two straight portions 221, 221 that contact the underside of the same glass plate 21, as shown in Figures 16 to 18, or may connect two straight portions 221A, 221B that contact the underside of different glass plates 21A, 21B, as shown in Figures 19 to 21.

Each folded portion 222 may be supported by a single pillar 34 as shown in Figures 16 and 19, or by multiple pillars 34 as shown in Figures 17, 18, 20, and 21. Multiple pillars 34 may have the first and second disk portions eccentric in the same direction at the same Z-axis position as shown in Figures 17 and 20, or the first and second disk portions eccentric in opposite directions at the same Z-axis position as shown in Figures 18 and 21.

The above describes the pallet and glass packaging body according to the present disclosure, but the present disclosure is not limited to the above-described embodiments. Various changes, modifications, substitutions, additions, deletions, and combinations are possible within the scope of the claims. Naturally, these also fall within the technical scope of the present disclosure.

REFERENCE SIGNS LIST 1 Glass package 2 Glass laminate 21 Glass plate 211 First main surface 22 Thread-like spacer 3 Pallet 31 Placement table 34 Pillar

Claims (15)

a mounting table on which a glass laminate is placed, the glass laminate including glass plates each including a main surface and a thread-like spacer in contact with the main surface of the glass plate, the glass plate being provided with a plurality of glass plates;
A support that supports and changes the direction of the thread-like spacers on the outside of the main surface of the glass plate when viewed from a Z-axis direction perpendicular to the main surface of the glass plate;
Equipped with
the thread-like spacers have linear portions that contact the main surfaces of the glass plates,
When viewed from the Z-axis direction, the linear portion crosses the main surface of the glass plate and extends to the support,
A pallet in which , when viewed from the Z-axis direction, the straight portions are provided at intervals in a desired direction, and the straight portions are provided parallel to each other . A pallet as described in claim 1 , wherein when viewed from the Z-axis direction, the average value of the distance between the center lines of adjacent straight portions is 100 mm or less. 3. The pallet according to claim 1 , wherein the length from the glass plate to the nearest support in the straight section is 15 mm or more and 300 mm or less. The pallet according to any one of claims 1 to 3 , wherein the support is detachable from the table. When viewed from the Z-axis direction, the glass plate has a rectangular shape and has first and second sides that are parallel to each other and third and fourth sides that are parallel to each other,
The pallet according to any one of claims 1 to 4, wherein a plurality of the supports are provided at intervals along each of the first side and the second side, or a plurality of the supports are provided at intervals along each of the third side and the fourth side. a stopper plate against which the obliquely downward end face of the glass plate abuts;
6. The pallet according to claim 5 , wherein the stopper plate abuts against the first side, and a plurality of the supports are provided at intervals along each of the third side and the fourth side. a stopper plate against which the obliquely downward end face of the glass plate abuts;
6. The pallet according to claim 5 , wherein the stopper plate abuts against the first side, and a plurality of the supports are provided at intervals along each of the first side and the second side. The pallet according to claim 5 , wherein the platform is horizontally disposed. The mounting table is provided horizontally,
a stopper plate against which one end surface of the glass plate abuts;
6. The pallet according to claim 5 , wherein the stopper plate abuts against the first side, and a plurality of the supports are provided at intervals along each of the third side and the fourth side. A pallet according to any one of claims 1 to 9 , wherein when viewed from the Z-axis direction, the support has an outer peripheral surface that bends the thread-like spacers into a bent line or curved line of 120° or more. The pallet according to any one of claims 1 to 10 , wherein the support has a tensile strength of 5 N/mm2 or more as measured in accordance with ISO 527-1, ² . The pallet according to any one of claims 1 to 11 , wherein the surface of the support is made of a resin. The pallet according to any one of claims 1 to 12 , wherein the surface roughness Ra of the support is 10 nm or less. The pallet according to any one of claims 1 to 13 , wherein the support has a recess on its outer circumferential surface. A glass package comprising the pallet according to any one of claims 1 to 14 and the glass laminate.