CN223279573U - Tray for packing glass sheets and glass sheet packing body - Google Patents

Abstract

The utility model provides a glass plate packing tray and a glass plate packing body, wherein the position of a buffer member is difficult to deviate relative to a tray main body when the glass plate is conveyed in a state of not loading the glass plate. A glass sheet packing tray (20) for supporting glass sheets (G) in a posture inclined in the front-rear direction, wherein the glass sheet packing tray (20) comprises a back receiving portion (21) for supporting the main surface of the glass sheets (G), a bottom receiving portion (22) for supporting the bottom edge of the glass sheets (G), and a base portion (23) for supporting the back receiving portion (21) and the bottom receiving portion (22), wherein the base portion (23) comprises a bottom surface (23C) in contact with the floor surface, the back receiving portion (21) comprises a support column (21 d) rising from the rear end of the base portion (23), and the gravity center position (G1) of the glass sheet packing tray (20) is located at a position on the rear side of the intermediate position (C) between the front end of the bottom surface (23C) and the rear end of the bottom surface (23C) in side view.

Description

Tray for packing glass sheets and glass sheet packing body

Technical Field

The present utility model relates to a glass sheet packing tray for supporting a plurality of glass sheets in an inclined posture, and a glass sheet package in which a glass sheet laminate obtained by laminating a plurality of glass sheets is placed on the glass sheet packing tray.

Background

Conventionally, a glass sheet packing tray for supporting a plurality of glass sheets in an inclined posture is known.

For example, patent document 1 discloses a glass sheet packing tray in which a laminate (glass sheet laminate) formed by laminating a plurality of glass sheets with a protective sheet interposed therebetween is placed and held in a state of a vertical posture.

The glass sheet packing tray includes a main surface support portion that supports a rear surface of a vertically arranged glass sheet laminate, a side support portion that supports a lower side of the glass sheet laminate, and a base portion that is provided with the main surface support portion and the side support portion.

Prior art literature

Patent literature

Patent document 1 International publication No. 2018/034180

Disclosure of utility model

Problems to be solved by the utility model

When conveying the glass plate laminate, the glass plate laminate is conveyed in a state of a glass plate package body placed on a glass plate packing tray in an inclined posture.

The glass plate packing tray is formed of a metal frame, and foam resin and rubber buffers are provided at the positions supporting the back surface portion and the bottom surface portion of the glass plate laminate. When these cushioning members are fixed to the tray main body with an adhesive, the adhesive peels off or volatilizes, so that there is a possibility that a contamination source derived from the adhesive adheres to the glass plate. Therefore, these buffers may not be fixed to the glass sheet packing tray.

Even when the buffer is not fixed to the glass sheet packing tray, when the glass sheet laminate is placed on the glass sheet packing tray and conveyed, the glass sheet laminate is pressed against the glass sheet packing tray by the fixing mechanism such as a belt, and therefore, the buffer member is less likely to be displaced from the glass sheet packing tray. However, when the glass sheet packaging tray is transported from a customer or the like to a glass sheet manufacturing factory after the glass sheet laminate is transported to the customer or the like, the buffer member is not fixed to the glass sheet packaging tray, and the buffer member may be displaced from the glass sheet packaging tray due to vibration or impact during transportation.

The present utility model has been made in view of the above-described conventional problems, and is characterized by providing a glass sheet packing tray and a glass sheet package in which the position of a buffer member is less likely to be displaced relative to a tray main body during conveyance even in a state where a glass sheet is not loaded.

Means for solving the problems

As described above, the present utility model provides a solution to this problem.

Specifically, the glass sheet packing tray according to claim 1 of the present utility model is for supporting glass sheets in a posture inclined in a front-rear direction, and is characterized by comprising a back receiving portion for supporting a main surface of the glass sheets, a bottom receiving portion for supporting a bottom edge of the glass sheets, and a base portion for supporting the back receiving portion and the bottom receiving portion, wherein the base portion has a bottom surface that contacts a floor surface, the back receiving portion has a pillar that is provided to stand up from a rear end of the base portion, and a center of gravity position of the glass sheet packing tray is located at a position on a rear side than a position intermediate between a front end of the bottom surface and a rear end of the bottom surface in a side view.

As described above, in the tray for packing glass sheets according to the present utility model, the center of gravity is located rearward, so that the tray is less likely to swing forward even when vibration is applied to the tray. Therefore, even when the glass plate is not mounted, the members such as the buffers mounted on the back receiving portion are less likely to be displaced during the conveyance of the tray.

In addition, in the tray for packing glass sheets according to claim 2 of the present utility model, in addition to the above-described claim 1, the center of gravity of the tray for packing glass sheets is located between the intermediate position and a position 1/4 of a distance between a front end of the bottom surface and a rear end of the bottom surface when viewed from a rear side separated from the intermediate position.

With this configuration, according to the tray for packing glass sheets of the present utility model, if the center of gravity is located rearward of the position 1/4 of the distance between the front end of the bottom surface and the rear end of the bottom surface when viewed from the rear side away from the intermediate position, the tray is likely to tilt rearward during transportation, storage, and loading operations, and the glass sheets are likely to be broken. By setting the ratio to 1/4 or less, such a problem can be prevented.

In addition, in the glass sheet packing tray according to claim 3 of the present utility model, in addition to the above-described claim 1 or 2, a height of a center of gravity of the glass sheet packing tray is smaller than a distance between a front end of the bottom surface and a rear end of the bottom surface in a side view.

With this structure, the center of gravity position is reduced, and stability during transportation, storage, and loading is improved.

In addition, in the glass sheet packing tray according to claim 4, in any one of the above-described aspects 1 to 3, a distance from a front end of the bottom surface to a rear end of the bottom surface in a side view is larger than a distance from a front end of the bottom receiving portion to a rear end of the back receiving portion in a side view.

By having such a structure, the stability of the tray main body is improved.

In addition, in the glass sheet packing tray according to claim 5, in any one of the above-described aspects 1 to 4, the front end of the bottom surface is located forward of the front end of the bottom receiving portion.

With this structure, the tray main body is more difficult to swing forward.

The glass sheet packing tray according to claim 6 of the present utility model is the tray according to any one of claims 1 to 5, wherein a ratio H/D of a height H of the tray to a distance D from a front end of the bottom surface to a rear end of the bottom surface in a side view is 0.9 or more and 3 or less.

By having such a structure, the H/D is 0.9 or more, so that the floor area does not become excessively large, and the conveying efficiency is improved. The H/D is 3 or less, thereby improving the stability during transportation and storage.

The tray for packaging glass sheets according to claim 7 of the present utility model is the tray for packaging glass sheets according to any one of claims 1 to 6, wherein the back receiving portion includes a back buffer that is in contact with the main surface of the glass sheet, and a back support surface that supports the back buffer, and the back buffer is disposed so as to be separable without being bonded to the back support surface.

With this structure, adhesion of dirt derived from the adhesive can be prevented, and replacement is easy in the event of deterioration of the cushioning material. Further, since the thermal expansion coefficient of the resin damper is different from that of the metal tray main body, the damper may be broken when the resin damper is bonded, but the resin damper is configured so as not to be bonded and can be separated, thereby preventing the damper from being broken.

The glass sheet package according to claim 8 of the present utility model is the glass sheet package tray according to any one of claims 1 to 7, wherein the glass sheet package body has a glass sheet laminate in which a plurality of glass sheets are stacked, and the center of gravity of the glass sheet package body is located on the rear side from the intermediate position.

With this structure, the center of gravity of the glass sheet package is located rearward, so that the glass sheet package is less likely to swing forward, and collapse of the glass sheet can be prevented.

In addition, in the glass sheet package according to claim 9 of the present utility model, in addition to the above-described claim 8, the center of gravity of the glass sheet package is located between the intermediate position and a position 1/4 of a distance between a front end of the bottom surface and a rear end of the bottom surface when viewed from the rear side away from the intermediate position.

With this structure, if the distance between the center of gravity of the glass sheet package and the center of the tray in the front-rear direction is greater than 1/4, the tray is likely to tilt backward during transportation, storage, and loading operations, and the glass sheet is likely to be broken. By setting the ratio to 1/4 or less, such a problem can be prevented.

In addition, in the glass sheet package according to claim 10 of the present utility model, in addition to the above-described claim 9, the center of gravity of the glass sheet package is located between the intermediate position and a position 1/5 of a distance between a front end of the bottom surface and a rear end of the bottom surface when viewed from the rear side away from the intermediate position.

With this structure, if the distance between the center of gravity of the glass sheet package and the center of the tray in the front-rear direction is greater than 1/5, the tray is likely to tilt backward during transportation, storage, and loading operations, and the glass sheet is likely to be broken. By setting the ratio to 1/5 or less, such a problem can be prevented.

Effects of the utility model

The effects of the present utility model are as follows.

That is, according to the glass sheet packing tray and the glass sheet packing body of the present utility model, it is possible to provide the glass sheet packing tray and the glass sheet packing body in which the position of the buffer member is less likely to be displaced from the tray main body at the time of conveyance even in a state where the glass sheet is not loaded.

Drawings

Fig. 1 is a side view showing the overall structure of a glass sheet package according to an embodiment of the present utility model.

Fig. 2 is a side view showing a tray for packing glass sheets according to an embodiment of the present utility model.

Fig. 3 is a schematic view showing the dimensions of the tray for packing glass sheets according to the present utility model.

Fig. 4 is a schematic view showing the dimensions of the glass sheet package of the present utility model.

Description of the reference numerals

1. Glass plate packing body

10. Glass plate laminate

20. Tray for packing glass sheets

21. Back support

22. Bottom bearing part

25. Back cushion

26. Bottom surface buffer

G glass plate.

Detailed Description

Next, an embodiment of the present utility model will be described with reference to fig. 1 to 4.

In fig. 1 to 4, the front-rear direction, the left-right direction, and the up-down direction of the glass sheet package 1 are defined by the directions of arrows.

[ Whole structure of glass plate package 1 ]

First, the overall structure of a glass sheet package 1 embodying the present utility model will be described with reference to fig. 1.

The glass sheet package 1 in the present embodiment is an example of a package form for conveying, storing, and the like a plurality of glass sheets G together.

The glass sheet package 1 is a package obtained by placing a glass sheet laminate 10 formed by laminating a plurality of glass sheets G on a glass sheet packing tray 20 (hereinafter, simply referred to as "tray") in a vertically-oriented posture and packing the glass sheet laminate.

Here, in the present embodiment, the glass sheet G packed in the glass sheet packing body 1 is a rectangular flat glass sheet used for, for example, a substrate or cover glass of a display such as a liquid crystal display device or an organic EL display device, and has an external dimension (vertical dimension×horizontal dimension) of 1500mm to 1500mm and 3500mm to 3500mm, and a thickness of 0.2mm to 2.0 mm.

The glass plate laminate 10 has a plurality of glass plates G and a plurality of protective sheets S sandwiched between the plurality of glass plates G.

The tray 20 has a back receiving portion 21 that supports the back surface (back surface in fig. 1) of the glass sheet G, a bottom receiving portion 22 that supports the bottom edge of the glass sheet G, and a base portion 23 that supports the back receiving portion 21 and the bottom receiving portion 22.

The back receiving portion 21 includes a back support surface 21a that supports a back surface that is a main surface of the glass sheet G, and a frame structure 21b that supports the back support surface 21a. The back surface support surface 21a is a surface on which the back surface of the glass plate G is placed, and is formed of a rectangular flat plate. The frame structure 21b is a skeleton structure for supporting the back support surface 21a, and includes a plurality of beams 21c for supporting the rear side of the back support surface 21a, and a column 21d joined to the rear end of the beams 21c and standing up in the vertical direction. The back support surface 21a of the back support portion 21 is provided in a state of standing up in a substantially right angle direction with respect to the upper surface 22a of the bottom support portion 22.

The bottom receiving portion 22 is formed of a substantially rectangular plate-like member extending in one direction (left-right direction in fig. 1) in the horizontal direction, and is disposed in a state of slightly inclining the upper surface 22a toward the front and upward. The glass plate G is placed on the upper surface 22a of the bottom receiving portion in a vertically-placed posture.

The glass plate G placed on the upper surface 22a of the bottom receiving portion 22 in the vertical posture is held in a state of being slightly tilted (inclined) toward the back receiving portion 21 side (rear side in fig. 1) by the back surface (rear surface) being supported by the back surface supporting surface 21a of the back receiving portion 21.

The base portion 23 includes, for example, a rectangular base frame 23a extending in the horizontal direction in plan view, and a plurality of support blocks 23b supporting the bottom receiving portion 22 along one end (front end in fig. 1) on the upper surface of the base frame 23 a. A bottom surface 23c that contacts the floor surface is provided at the lower end of the base portion 23, and a plurality of support columns 23d are arranged between the base frame 23a and the bottom surface. The other end (rear end in fig. 1) of the base frame 23a is connected to a pillar 21d provided to stand up in the vertical direction.

When the glass sheet laminate 10 is supported by the back support portion 21 and the bottom support portion 22 of the tray 20, a back buffer 25 and a bottom buffer 26 are provided between the upper surface 22a of the back support portion 21 and the bottom support portion 22 and the glass sheet laminate 10. The back buffer 25 is a member that abuts against the rear main surface of the glass plate laminate 10, and is placed on the back support surface 21a of the back receiving portion 21. The back cushion 25 is disposed so as to be separable without being bonded to the back support surface 21a. The back cushion 25 is a plate-like member made of foamed polypropylene or the like, and is made of a material having excellent load resistance and impact resistance.

The bottom surface buffer 26 is a member that contacts the lower surface of the glass plate laminate 10, and is placed on the upper surface 22a of the bottom receiving portion 22. The bottom surface cushioning material 26 is configured to be separable without being bonded to the upper surface 22a. The floor cushion 26 is a sheet formed of an elastic member such as rubber, and is formed of a material having excellent load resistance and impact resistance.

As shown in fig. 1, the glass sheet package 1 is configured in a state in which a glass sheet laminate 10 formed by laminating a plurality of glass sheets G and protective sheets S is placed on a tray 20. In a state where the glass sheet laminate 10 is placed, the glass sheet laminate 10 and the tray 20 are wound together by a fixing mechanism such as a tape, so that the glass sheet laminate 10 can be prevented from being separated from the tray 20 and from tipping over.

When the glass sheet package 1 is placed on the tray 20 and conveyed, the glass sheet package 10 is pressed against the tray 20 by a fixing mechanism such as a belt, and therefore, it is difficult to cause the back cushion 25 and the bottom cushion 26 to be displaced from the tray 20.

However, as shown in fig. 2, when the glass sheet laminate 10 is transported to a customer or the like and then the pallet 20 is transported from the customer or the like to a manufacturing plant for the glass sheet G, the back surface buffer 25 and the bottom surface buffer 26 are not fixed to the pallet 20, and the back surface buffer 25 and the bottom surface buffer 26 may be offset from the pallet 20 due to vibration or impact during transportation.

Therefore, in a state where the rear cushion 25 and the bottom cushion 26 are not fixed to the tray 20, a structure for preventing the rear cushion 25 and the bottom cushion 26 from being offset from the tray 20 is required.

As shown in fig. 3, the gravity center position G1 of the tray 20 is located rearward of the intermediate position C between the front end of the bottom surface 23C and the rear end of the bottom surface 23C in side view. Preferably, the center of gravity position G1 of the tray 20 is located between the intermediate position C and a position L1 of 1/4 of the distance D between the front end of the bottom surface 23C and the rear end of the bottom surface 23C when viewed from the rear side from the intermediate position C. More preferably, the center of gravity position G1 of the tray 20 is located between the intermediate position C and a position L2 of 1/5 of the distance D between the front end of the bottom surface 23C and the rear end of the bottom surface 23C when viewed from the rear side from the intermediate position C.

As shown in fig. 3, when the distance from the intermediate position C to the gravity center position G1 is D1, the distance D1 is greater than 0 when the rearward length is positive. The distance D1 is preferably smaller than D/4, more preferably smaller than D/5.

Here, the gravity center position G1 of the tray 20 is a gravity center position in a state where the glass sheet laminate 10 is removed from the glass sheet package body 1, and is a gravity center position in a state where the back surface cushion 25 and the bottom surface cushion 26 are placed on the back surface support surface 21a and the upper surface 22a of the tray 20.

The intermediate position C is an intermediate position of the distance D from the front end to the rear end of the bottom surface 23C, and is a position that does not include the rear end of the block or the like even when other members such as the block are provided at a position rearward of the bottom surface 23C, for example.

In this way, the center of gravity position G1 is located rearward of the intermediate position C, and therefore, when the pallet 20 is transported from a customer or the like to the manufacturing plant for the glass sheet G, the center of gravity position G1 is located rearward, and therefore, even when vibration or impact is applied to the pallet 20, the pallet 20 is less likely to swing forward. Therefore, even when the glass sheet laminate 10 is not mounted, the back buffer 25 mounted on the back receiving portion 21 is less likely to be displaced during conveyance of the tray 20.

If the center of gravity G1 is located rearward of the position L1 that is 1/4 of the distance D between the front end of the bottom surface 23C and the rear end of the bottom surface 23C, which is separated rearward from the intermediate position C, the tray 20 tends to tilt rearward during transportation, storage, and loading, and the glass sheet G tends to be broken. Therefore, since the center of gravity position G1 of the tray 20 is located between the intermediate position C and the position L1 of 1/4 of the distance D between the front end of the bottom surface 23C and the rear end of the bottom surface 23C when seen from the rear side from the intermediate position C, the tray 20 is less likely to tilt rearward during transportation, storage, and loading work, and breakage of the glass sheet G can be prevented.

Further, the center of gravity position G1 is located between the intermediate position C and the position L2 which is separated from the intermediate position C toward the rear side by 1/5 of the distance D between the front end of the bottom surface 23C and the rear end of the bottom surface 23C, whereby the malfunction can be prevented more reliably.

The height Hg of the gravity center position G1 of the tray 20 is smaller than the distance D between the front end of the bottom surface 23c and the rear end of the bottom surface 23c in side view. The height Hg of the gravity center position G1 is a height from the floor surface to the gravity center position G1. With this configuration, the center of gravity G1 is lowered, and stability during transportation, storage, and loading is improved.

The distance D from the front end of the bottom surface 23c to the rear end of the bottom surface 23c in side view is larger than the distance D2 from the front end of the bottom receiving portion 22 to the rear end of the back receiving portion 21 in side view. By such a constitution, the stability of the tray 20 is improved.

Here, the front end of the bottom receiving portion 22 is a position of the front end of the bottom receiving portion 22 in a plan view, and is, for example, a front end of the upper surface 22a in fig. 3. In fig. 3, the front end of the bottom surface 23c is located forward of the front end of the bottom receiving portion 22. The rear end of the back support portion 21 is the rear end of the stay 21d constituting the back support portion 21, and is located at the same position in the front-rear direction as the rear end of the bottom surface 23c in fig. 3.

The ratio H/D of the height H of the tray 20 to the distance D from the front end of the bottom surface 23c to the rear end of the bottom surface 23c in side view is 0.9 to 3.

Here, the height dimension H of the tray 20 is the height from the floor surface to the back receiving portion 21.

By having such a structure, the H/D is 0.9 or more, so that the floor area does not become excessively large, and the conveying efficiency is improved. The H/D is 3 or less, so that the height of the tray 20 is not excessively large, and the stability during transportation and storage is improved.

The inclination angle θ of the back surface support surface 21a of the back support portion 21 is 15 ° or more and 45 ° or less. With this configuration, the floor space is not excessively increased, and the conveying efficiency is improved. That is, the space of the vehicle for transportation can be reduced, and therefore the transportation efficiency can be improved.

As shown in fig. 4, the center of gravity G2 of the glass sheet package 1 having the glass sheet laminate 10 mounted on the tray 20 is located rearward of the intermediate position C between the front end of the bottom surface 23C and the rear end of the bottom surface 23C in side view. Preferably, the center of gravity of the glass sheet package 1 is located between the intermediate position C and a position L1 which is 1/4 of the distance between the front end of the bottom surface 23C and the rear end of the bottom surface 23C when viewed from the rear side from the intermediate position C. More preferably, the center of gravity of the glass sheet package 1 is located between the intermediate position C and a position L2 of 1/5 of the distance between the front end of the bottom surface 23C and the rear end of the bottom surface 23C when viewed from the rear side from the intermediate position C.

As shown in fig. 4, when the distance from the intermediate position C to the gravity center position G2 is D3, the rearward length is positive, and the distance D3 is greater than 0. The distance D3 is preferably smaller than D/4, more preferably smaller than D/5.

Here, the gravity center position G2 of the glass sheet package 1 is a gravity center position in a state where the glass sheet laminate 10, the back surface buffer 25, and the bottom surface buffer 26 are placed on the back surface 21a and the upper surface 22a of the tray 20.

The intermediate position C is an intermediate position of a distance from the front end to the rear end of the bottom surface 23C, and is a position excluding the rear end of the block or the like even when other members such as the block are provided at a position rearward of the bottom surface 23C.

As described above, since the gravity center position G2 is located rearward of the intermediate position C, even when vibration is applied to the glass sheet package 1 during transportation and storage of the glass sheet package 1, the glass sheet package 1 is less likely to swing forward. Therefore, the glass sheet package 1 is less likely to swing forward during conveyance of the glass sheet package, and collapse of the glass sheet G can be prevented.

If the center of gravity G2 is located rearward of the position L1 that is 1/4 of the distance between the front end of the bottom surface 23C and the rear end of the bottom surface 23C, which is separated rearward from the intermediate position C, the glass sheet package 1 tends to tilt rearward during transportation, storage, and loading, and the glass sheet G tends to be broken. Therefore, the center of gravity G2 of the glass sheet package 1 is located between the intermediate position C and the position L1 of 1/4 of the distance between the front end of the bottom surface 23C and the rear end of the bottom surface 23C when seen from the rear side from the intermediate position C, so that the tray 20 is less likely to tilt rearward during transportation, storage, and loading work, and breakage of the glass sheet G can be prevented.

Further, the center of gravity position G2 is located between the intermediate position C and the position L2 which is separated from the intermediate position C toward the rear side by 1/5 of the distance between the front end of the bottom surface 23C and the rear end of the bottom surface 23C, whereby the malfunction can be prevented more reliably.

Examples

The present utility model will be described below based on examples. The following examples are merely illustrative, and the present utility model is not limited to the following examples.

Four trays having the dimensions shown in examples 1 to 4 and comparative examples 1 and 2 of table 1 were prepared, respectively, and a conveyance test was performed as follows. First, for each example of the examples and comparative examples, acceleration sensors were mounted on the upper ends of four pallets, and the pallets were loaded on the bed of a truck and traveled for 200km. Then, the presence or absence of the tray having the back cushion and the bottom cushion offset by 10mm or more and the average value of the measurement values of the acceleration sensor were checked.

TABLE 1

In the trays of examples 1 to 4, the center of gravity was located at a position on the rear side of the intermediate position between the front end of the bottom surface and the rear end of the bottom surface in side view, and there was no back buffer and a tray having a bottom buffer offset of 10mm or more. The average acceleration of the upper end portions of the trays is 0.6G or less, and the acceleration acting on the trays due to vibration and impact during conveyance is small. On the other hand, in the trays of comparative examples 1 and 2, the position of the center of gravity was located on the front side of the intermediate position between the front end of the bottom surface and the rear end of the bottom surface in side view, and the offset amounts of the rear surface cushioning material and the bottom surface cushioning material were 10mm or more. The average acceleration of the upper end of the tray is 1.7G or more, and the acceleration acting on the tray due to the vibration or impact during conveyance is large.

While the present utility model has been described with reference to the above embodiments, it is to be understood that the present utility model is not limited to the embodiments, and it is to be understood that the present utility model is by way of illustration only, and that the present utility model is not limited to the embodiments, but can be variously embodied within a scope not departing from the spirit of the present utility model, and the scope of the present utility model is indicated by the description of the present utility model, including all the equivalent meaning and all the modifications within the scope of the present utility model.

Claims (10)

1. A glass plate packaging tray for supporting glass plates in a tilted position in the front-back direction. It is characterized in that The glass plate packaging tray includes: a back support portion that supports the main surface of the glass plate; a bottom support portion that supports the bottom edge of the glass plate; and a base portion that supports the back support portion and the bottom support portion. The base portion has a bottom surface in contact with the floor surface, The back support portion has a support column erected from the rear end of the base portion. The center of gravity of the glass plate packaging tray is located rearward of a midpoint between the front end of the bottom surface and the rear end of the bottom surface in a side view. 2. The glass plate packaging pallet according to claim 1, wherein The center of gravity of the glass plate packaging pallet is located between the middle position and a position that is 1/4 of the distance between the front end and the rear end of the bottom surface when viewed from the side away from the middle position. 3. The glass plate packaging pallet according to claim 1 or 2, wherein: The height of the center of gravity of the glass plate packaging tray is smaller than the distance between the front end and the rear end of the bottom surface in a side view. 4. The glass plate packaging pallet according to claim 1 or 2, wherein: A distance from a front end of the bottom surface to a rear end of the bottom surface in a side view is greater than a distance from a front end of the bottom support portion to a rear end of the back support portion in a side view. 5. The glass plate packaging pallet according to claim 4, wherein: The front end of the bottom surface is located forward of the front end of the bottom receiving portion. 6. The glass plate packaging pallet according to claim 1 or 2, wherein: A ratio H/D of a height dimension H of the glass plate packaging tray to a distance D from a front end to a rear end of the bottom surface in a side view is 0.9 or more and 3 or less. 7. The glass plate packaging pallet according to claim 1 or 2, wherein: The back receiving portion includes: a back cushioning member that contacts the main surface of the glass plate; and a back supporting surface that supports the back cushioning member. The back surface cushion material is disposed detachably from the back surface support surface without being bonded thereto. 8. A glass plate package, comprising: a glass plate laminated body obtained by laminating a plurality of glass plates on the glass plate package tray according to claim 1 or 2; It is characterized in that The center of gravity of the glass plate package is located rearward of the intermediate position. 9. The glass plate package according to claim 8, wherein The center of gravity of the glass plate package is located between the middle position and a position that is 1/4 of the distance between the front end and the rear end of the bottom surface when viewed from the side away from the middle position toward the rear. 10. The glass plate package according to claim 9, wherein The center of gravity of the glass plate package is located between the middle position and a position that is 1/5 of the distance between the front end and the rear end of the bottom surface when viewed from the side away from the middle position toward the rear.