JP2023118450A - tray - Google Patents

Abstract

To provide a tray in which an upper tray can be easily pulled out with respect to a lower tray, from a condition that the trays are vertically piled.SOLUTION: A tray 100 can be vertically piled by inserting a tip end of a leg part 20 to an opening of a leg part 20 of the other tray located at a position below the tray 100. The leg part 20 of the tray 100 has a leg part bottom wall 21, a leg part outer wall 22, and a leg part inner wall 23. Further, in the opening 25 side of the leg part 20, a first expanded part 40 expanded outward from a center of a board part 10 is provided. The leg part inner wall 23 extends upward from the leg part bottom wall 21 with an incline larger than the leg part outer wall 22.SELECTED DRAWING: Figure 3

Description

The present invention relates to technology for trays that can be stacked one above the other.

Patent Literature 1 describes a tray that includes a plate portion and legs extending downward from the plate portion. Openings are formed above the legs, and by inserting the ends of the legs of the upper tray into the openings of the legs of the lower tray, the trays can be stacked vertically. .

Japanese Utility Model Laid-Open No. 7-040452

When pulling out the upper tray from among the vertically stacked trays, the outer edge side of the tray may droop downward. In this case, the outer periphery of the leg of the upper tray may interfere with the inner periphery of the leg of the lower tray into which the leg is inserted, making it difficult to pull out the upper tray from the lower tray.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tray in which an upper tray can be easily pulled out from a lower tray when the trays are stacked vertically.

In order to solve the above problems, the invention according to claim 1 is a substantially rectangular plate portion in a plan view having a pair of first sides and a pair of second sides extending in a direction intersecting the first sides. and a hollow leg portion extending downward from a plate portion and having an opening upward. The trays can be stacked vertically by inserting the tips of the legs into the openings of the legs of other trays positioned below the tray, and the legs are formed by the leg bottom walls, A leg outer wall extending upward from the leg bottom wall facing the direction from the center to the outer periphery of the plate, and a leg inner wall extending upward from the leg bottom wall on the opposite side of the leg outer wall. , and the leg inner wall extends upwardly from the leg bottom wall at a steeper slope than the leg outer wall. A first bulging portion is provided that extends upward from the outer wall of the leg portion and bulges from the center of the plate portion toward the outer periphery of the tray.

In the above configuration, the trays can be vertically stacked by inserting the tip of the leg of the tray into the opening of the leg of another tray located below this tray. When the upper tray and the lower tray are stacked vertically, a first gap is formed between the outer wall of the leg portion of the upper tray and the first protrusion of the lower tray. , a second gap is formed between the inner leg wall of the upper tray and the inner leg wall of the lower tray. Therefore, even if the outer edge of the tray hangs downward when the upper tray is pulled out from the lower tray, the trays will not be separated from each other. The first gap between the outer wall of the leg and the second gap between the inner wall of the leg relieve the contact between the trays. This allows the upper tray to be easily pulled out from the lower tray.

The invention according to claim 2 is the tray according to claim 1, wherein the leg outer wall further comprises a lower outer wall extending upward from the leg bottom wall, the lower outer wall and the first bulging portion. and a second bulging portion extending between and bulging in the same direction as the direction in which the first bulging portion protrudes. The first bulging portion bulges outward more than the second bulging portion in the direction from the center of the plate portion toward the outer circumference of the tray. In the above configuration, when the trays are stacked vertically, the third gap is formed between the lower outer wall of the upper tray and the second protrusion of the lower tray, and the upper tray and the lower tray It is possible to reduce the contact area between the outer walls of the leg portions. As a result, when the upper tray is pulled out upward, contact between the outer walls of the leg portions is alleviated, and the tray can be pulled out more easily.

The invention according to claim 3 is the tray according to claim 1 or 2, wherein the leg extends horizontally, is above the bottom wall of the leg, and is below the first protrusion. The inner leg wall extends from the leg bottom wall to the leg inner wall. In the above configuration, since the inner wall of the leg portion is positioned below the bulging portion, the insertion amount of the tip of the leg portion of the upper tray into the lower tray is reduced. This makes it easier to pull out the tray when pulling out the upper tray upward.

The invention according to claim 4 is the tray according to any one of claims 1 to 3, wherein a holding part capable of being held by a transfer device is provided in the center of the plate part, and the leg part is the plate part The holding portion includes a holding upper wall having a surface facing upward, a holding lower wall positioned below the holding upper wall, and a holding lower wall from the holding lower wall. holding side walls extending toward the holding upper wall, the holding side walls being formed on the pair of first side sides at positions different from the first holding side walls in the direction in which the first side extends. a second retention sidewall extending from the retention bottom wall toward the retention top wall at a greater slope than the second retention sidewall. In the above configuration, when the upper tray is stacked on the lower tray, the difference in gradient between the first holding side wall and the second holding side wall causes the first wall portion of the upper tray and the lower tray to fall apart in the holding portion. A gap is formed between the first wall portion of the As a result, when the upper tray is pulled upward while the holder is held by the transfer device, the upper tray can be easily pulled out from the lower tray.

The invention according to claim 5 is the tray according to claim 4, wherein the holding upper wall is formed with a locking hole that penetrates the holding upper wall in the vertical direction and can be locked by the transfer device. ing. If the portion of the holding upper wall that continues to the first holding side wall in the direction in which the first side extends is the inclined upper wall portion, the locking hole is formed at least in the inclined upper wall portion. In the above configuration, when the upper tray and the lower tray are stacked, the locking hole formed in the inclined upper wall portion is aligned with the first retaining sidewall of the upper tray and the first holding sidewall of the lower tray. It communicates with the gap formed between it and the holding side wall. As a result, when the upper tray is pulled upward from the lower tray, air flows into the gap between the trays through the locking holes, making it easier to pull out the trays.

The invention according to claim 6 is the tray according to any one of claims 1 to 5, comprising a side wall extending upward from the plate along the direction in which the four sides of the plate extend, The leg portion has a leg portion side wall extending between the leg portion outer wall and the leg portion inner wall. and a curved portion that curves and connects at least one of the side walls, and as the curved portion extends upward, the curved portion has the same gradient as the outer wall of the leg portion in the horizontal direction from the center of the plate portion toward the outer periphery of the tray. extended. In the above configuration, when the upper tray is stacked on the lower tray, the curved portions of the trays contact each other, so that the amount of insertion of the leg of the upper tray into the opening of the leg of the lower tray is reduced. is restricted. This makes it easier to form a gap at the outer wall of the leg portion and a gap at the inner wall of the leg portion between the vertically stacked trays. In addition, it is possible to prevent the legs of the upper tray from being too caught in the openings of the legs of the lower tray. These make it easier to pull out the tray.

The invention according to claim 7 is the tray according to any one of claims 1 to 6, wherein in a state in which the trays are stacked vertically, the first bulging portion of the lower tray and the upper A first gap is formed between the outer leg wall of the tray and a second gap is formed between the inner leg wall of the lower tray and the inner leg wall of the upper tray.

According to the present invention, it is possible to provide a tray that can suppress an increase in storage space by being vertically stacked during storage, and that allows the upper tray to be easily pulled upward from the lower tray during use.

It is the perspective view which looked at the tray from the upper side. It is the perspective view which looked at the tray from the downward side. It is a sectional view of a tray. It is a figure which expands and shows a holding|maintenance part. FIG. 5 is a cross-sectional view taken along line AA in FIG. 4; FIG. 5 is a cross-sectional view taken along line BB in FIG. 4; It is a figure which expands and shows a bending part. FIG. 8 is a cross-sectional view taken along line CC of FIG. 7; FIG. 9 is a cross-sectional view taken along line DD of FIG. 8; FIG. 4 is a diagram for explaining trays in a nesting state; FIG. 10 is a cross-sectional view showing the displacement of the legs when the upper tray is pulled out from the lower tray;

(First Embodiment) An embodiment of the tray of the present invention will be described with reference to the drawings. The tray according to the present embodiment is for storing or transporting articles on which they are placed. FIG. 1 is a perspective view of the tray viewed from above. FIG. 2 is a perspective view of the tray viewed from below.

During storage, the tray 100 can be stacked vertically and stored by inserting the tip of the leg portion 20 into the opening of the leg portion of another tray located below this tray. On the other hand, at the time of use, the upper tray of the vertically stacked trays is pulled out and used. Hereinafter, a state in which a plurality of trays are vertically stacked is also referred to as a “nesting state”.

The tray 100 includes a plate portion 10 , a leg portion 20 , a first bulging portion 40 , a holding portion 50 , a first side wall 60 , a second side wall 61 and a curved portion 70 . The tray 100 is formed by molding a resin such as polypropylene, for example.

The plate portion 10 is a substantially rectangular portion in plan view, and has a placement surface 13 , a back surface 14 and an insertion portion 15 . The plate portion 10 is a portion having four sides, a pair of first sides 11 that are long sides and a pair of second sides 12 that are short sides extending in a direction intersecting the first sides 11 . The placement surface 13 is a surface that faces upward when the tray 100 is in use, and is a surface on which articles are placed. The back surface 14 is a surface that faces downward when the tray 100 is in use, and is also a surface that faces the opposite side to the placement surface 13 .

Below, the direction in which the first side 11 extends in the plate portion 10 is described as a first direction D1, and the direction in which the second side 12 extends is described as a second direction D2. The direction in which the mounting surface 13 and the back surface 14 of the plate portion 10 face is referred to as a height direction D3.

A plurality of insertion portions 15 are formed in the plate portion 10 . The insertion portion 15 is a recess that opens on the placement surface 13 side and into which a part of the article placed on the placement surface 13 is inserted. A plurality of insertion portions 15 are formed in the plate portion 10 on the outer peripheral side of the tray from the center of the mounting surface 13 where the holding portion 50 is positioned. In the present embodiment, the insertion portion 15 extends in the first direction D1 and the second direction D2, and has an L-shaped opening in plan view. The shape of the insertion portion 15 is not limited to this, and can be formed in a shape suitable for a part of the article to be placed on the placement surface 13, such as elliptical, square, triangular, and rod-like.

A fitting protrusion 16 extending downward from the plate portion 10 is provided on the back surface 14 side of the plate portion 10 . The fitting protrusion 16 is a part for holding the tray 100 on the deck surface of the pallet, and more specifically, is a part inserted into an opening formed in the deck surface of the pallet. In this embodiment, the fitting protrusion 16 extends downward from the holding portion 50 on the rear surface 14 side of the plate portion 10 .

A first side wall 60 and a second side wall 61 extend upward from the edge of the plate portion 10 on the first side 11 side and the edge on the second side 12 side. The first side wall 60 and the second side wall 61 are connected by curved portions 70 positioned above the four corners of the plate portion 10 . The shape of the curved portion 70 will be described later. In the tray 100 , the outer circumference of the tray 100 is formed by the upper ends of the first side wall 60 , the second side wall 61 and the curved portion 70 . The first and second side walls 60 and 61 do not have to extend continuously in the first and second directions D1 and D2, respectively, and may be partially discontinuous.

As shown in FIG. 3, the first bulging portion 40 is a portion that extends upward from the leg portion 20 (more specifically, the leg portion outer wall 22, which will be described later). The first bulging portion 40 is a portion that bulges more than the leg portion 20 from the center of the plate portion 10 toward the outer periphery of the tray 100 in the first direction D1. Specifically, a portion 40</b>A of the first bulging portion 40 connected to the leg portion 20 extends upward with a greater gradient than the leg portion outer wall 22 of the leg portion 20 , which will be described later. In this embodiment, the "gradient" is determined by an angle opening outward or inward from the height direction D3, with the height direction D3 as a reference (that is, 0 degrees). Thereby, the leg portion 20 has a shape that is narrowed from the outer peripheral side of the tray 100 with respect to the first bulging portion 40 toward the center of the plate portion 10 . In addition, "from the outer peripheral side of the tray 100 toward the center of the plate portion 10" means that, when the leg portion 20 extends downward on the second side 12 side of the plate portion 10, the tray is positioned in the first direction D1. It is the direction from the upper end of the second side wall 61 forming the outer circumference of the plate portion 100 toward the center of the plate portion 10 .

In the present embodiment, the first bulging portion 40 forms part of the second side wall 61 by extending along the second direction D2. In other words, in the present embodiment, the portion of the second side wall 61 where the leg portion 20 extends is the first swelling portion 40 . Alternatively, the first bulging portion 40 may not form part of the second side wall 61, in which case the first bulging portion 40 extends toward the second side wall 61 in the second direction D2. It extends discontinuously.

The leg portion 20 is a portion that supports the plate portion 10 . In this embodiment, the tray 100 has six leg portions 20 extending downward from the back surface 14 of the plate portion 10 . Each leg portion 20 extends downward from the second side 12 side, which is the short side, on the back surface 14 of the plate portion 10 . Each leg 20 is positioned side by side along the second direction D2 in which the second side 12 extends.

As shown in FIG. 3 , the leg 20 includes a leg bottom wall 21 , a leg outer wall 22 , a leg inner wall 23 and a leg inner wall 24 . The leg portion 20 is a hollow portion having an opening 25 on the upper side by connecting the walls 21 , 22 , 23 , and 24 .

The leg outer wall 22 is a portion that faces the outer periphery of the tray 100 from the center of the plate portion 10 in the first direction and extends upward from the leg bottom wall 21 . Specifically, the leg outer wall 22 is inclined in the first direction D1 from the center of the plate portion 10 toward the outer periphery of the tray as it extends upward. The leg outer wall 22 has a lower outer wall 31 and a second bulging portion 32 . In this embodiment, the slope of the outer leg wall 22 is at the same angle as the slopes of the first sidewall 60 and the second sidewall 61 .

The lower outer wall 31 is a portion extending upward from the leg bottom wall 21 . The second bulging portion 32 is a portion that extends from the lower outer wall 31 to the first bulging portion 40 and bulges outward from the lower outer wall 31 in the first direction D1. Specifically, a portion 32</b>A of the second bulging portion 32 connected to the lower outer wall 31 extends upward with a greater gradient than the lower outer wall 31 . Thereby, the lower outer wall 31 has a shape that is narrowed from the outer peripheral side of the tray 100 toward the center of the plate portion 10 with respect to the second bulging portion 32 . The outer wall 22 of the leg part is narrowed from the outer peripheral side of the tray 100 toward the center of the plate part 10 in the first direction D1 so as to shift from the upper side to the lower side in the order of the second bulging part 32 and the lower outer wall 31 . It has a well-defined shape.

The leg inner wall 23 is a portion extending upward from the leg bottom wall 21 on the opposite side of the leg outer wall 22 in the first direction D1. The leg inner wall 23 is inclined in the first direction D1 from the outer peripheral side of the tray 100 toward the center of the plate portion 10 as it extends upward. Specifically, the leg inner wall 23 extends upward from the leg bottom wall 21 with a greater gradient than the leg outer wall 22 .

The leg inner wall 24 is a portion extending horizontally from the upper end of the leg inner wall 23 . The leg middle wall 24 is located above the leg bottom wall 21 and below the first swelling portion 40 . More specifically, the leg middle wall 24 is located above the leg bottom wall 21 and below the second swelling portion 32 .

The leg outer wall 22 , the leg inner wall 23 and the leg inner wall 24 are connected by a leg side wall 27 . The leg sidewall 27 is a portion that curves and extends in the first direction D<b>1 between the leg inner wall 23 and the leg inner wall 24 and the leg outer wall 22 .

In the leg portion 20 configured as described above, the leg portion outer wall 22 and the leg portion inner wall 23 extend upward from each end of the leg portion bottom wall 21 in the first direction D1, thereby forming an opening 25 on the upper side. It has a hollow shape. The inner leg wall 23 and the lower outer wall 31 of the outer leg wall 22 form an insertion space 26 into which the tip of the leg 20 of the tray 100 can be inserted in the nesting state.

The holding portion 50 is a portion held by the transfer device when the upper tray 100 is pulled out from the nested trays. FIG. 4 shows an enlarged view of the holding portion 50 of the nested trays. As shown in FIG. 4, the holding portion 50 includes a holding upper wall 51 having a surface facing upward, a holding lower wall 52 positioned below the holding upper wall 51, and a lower holding wall 52 extending in the height direction D3. and a retention side wall 53 extending from 52 toward retention top wall 51 .

The holding part 50 has two holding upper walls 51 . The holding upper walls 51 are arranged in the first direction D1 and are connected in the first direction D1 by connecting portions 59 . The connecting portion 59 is located below each holding upper wall 51 and above the holding lower wall 52 in the height direction D3. Each holding upper wall 51 is formed with a locking hole 56 that penetrates through the holding upper wall 51 and can be locked when the transfer device holds the holding portion 50 . The shape of the locking hole 56 will be described later.

The retention sidewall 53 has a first retention sidewall 54 and a second retention sidewall 55 . In the holding portion 50, the first holding side wall 54 and the second holding side wall 55 are formed at different positions in the first direction D1. In this embodiment, the two first holding side walls 54 are positioned on both sides of the connecting portion 59 in the first direction D1. Also, the two second holding sidewalls 55 are located outside the first holding sidewalls 54 in the first direction D1.

FIG. 5 is a cross-sectional view of the holding portion 50 in the nesting state, taken along line AA in FIG. The holding portion 50 includes a pair of first holding side walls 54 having surfaces facing outward in the second direction D2. Each first holding side wall 54 extends upward from the holding lower wall 52 in the height direction D3, and extends from the upper end side of the first side wall 60, which is the outer periphery of the tray 100, to the center of the plate portion 10 in the second direction D2. extending towards.

FIG. 6 is a cross-sectional view of the holder 50 in the nesting state, taken along line BB in FIG. The holding portion 50 includes a pair of second holding side walls 55 having surfaces facing outward in the second direction D2. Each second holding side wall 55 extends upward from the holding lower wall 52 in the height direction D3, and extends from the upper end side of the first side wall 60, which is the outer periphery of the tray 100, to the center of the plate portion 10 in the second direction D2. extending towards.

The first retention sidewall 54 extends from the retention bottom wall 52 toward the retention top wall 51 at a steeper slope than the second retention sidewall 55 . In the present embodiment, as shown in FIG. 6, the first holding side wall 54 protrudes further outward than the second holding side wall 55 in the second direction D2, and the position of the surface facing the second direction D2 is , is different from the second retaining sidewall 55 .

The positional relationship between the first holding side wall 54 and the second holding side wall 55 in the holding side wall 53 is not limited to the above configuration. For example, the second holding side wall 55 may bulge outward in the second direction D2 more than the first holding side wall 54 . The two second holding sidewalls 55 are located on both sides of the connecting portion 59 in the first direction D1, and the two first holding sidewalls 54 are positioned outside the second holding sidewalls 55 in the first direction D1. may be located.

A portion of the holding upper wall 51 that is connected to the first holding side wall 54 is referred to as a first upper wall portion 57 , and a portion that is connected to the second holding side wall 55 is referred to as a second upper wall portion 58 . The holding upper wall 51 is formed with substantially rectangular locking holes 56 extending in the first direction D1 and the second direction D2. Of the opening ends of the locking hole 56 in the first direction D1, the end on the connecting portion 59 side (that is, the center side of the plate portion 10) is located up to the first upper wall portion 57, The opposite end of the open end extends to the second upper wall portion 58 . In this embodiment, the first upper wall portion 57 is an example of the inclined upper wall portion.

In the nested trays, the holding portion 50 of the upper tray 100 and the holding portion 50 of the lower tray 100 are vertically stacked. Here, since the first holding side wall 54 of the holding portion 50 has a steeper slope than the second holding side wall 55, as shown in FIG. , a gap T4 is formed between the first holding side walls 54 . Further, since the locking hole 56 penetrates the first upper wall portion 57 of the holding upper wall 51, the locking hole 56 communicates with the gap T4 formed between the first holding side walls 54. . Although no gap is formed between the second holding side walls 55 of the upper tray 100 and the lower tray 100 in FIG. 6, a slight gap may be formed.

FIG. 7 is an enlarged view of the curved portion 70 of the nested tray. 8 is a cross-sectional view taken along line CC of FIG. 7. FIG. 9 is a cross-sectional view taken along line DD of FIG. 8. FIG.

The curved portion 70 is a portion that connects the first side wall 60 and the second side wall 61 above the four corners of the plate portion 10 . As shown in FIGS. 8 and 9, the upward portion of the curved portion 70 has the same gradient as the leg portion outer wall 22 as it extends upward, and extends from the center of the plate portion 10 to the tray 100 in the horizontal direction. It extends toward the outer circumference.

Next, nested trays will be described. FIG. 10 is a cross-sectional view of trays in a nested state. In the trays in the nesting state, the upper tray 100 is referred to as "upper tray 100A" and the lower tray 100 is referred to as "lower tray 100B". FIG. 11 is a cross-sectional view of the trays in the nested state, showing a scene in which the upper tray 100A is drawn upward as indicated by the white arrow with respect to the lower tray 100B.

With the tips of the legs 20 of the upper tray 100A directed toward the mounting surface 13 of the lower tray 100B, the lower tray 100B is inserted into the insertion spaces 26 of the legs 20 to create a nesting state. At this time, as shown in FIG. 10, on the leg outer wall 22 side, a first gap T1 is formed between the first bulging portion 40 of the lower tray 100B and the second bulging portion 32 of the upper tray 100A. It is formed. Further, since the slope of the inner leg wall 23 is larger than the slope of the outer leg wall 22, a second gap T2 is formed between the inner leg walls 23 of the trays 100A and 100B on the side of the inner leg wall 23. .

Furthermore, in the trays in the nesting state, a third gap T3 is formed between the lower outer wall 31 of the upper tray 100A and the second bulging portion 32 of the lower tray 100B on the leg outer wall 22 side. These first to third gaps T1 to T3 can reduce the contact area between the legs of the upper tray 100A and the lower tray 100B.

On the leg inner wall 23 side, since the leg inner wall 24 is formed at a position lower than the first bulging portion 40, the tip of the leg 20 of the upper tray 100A can be inserted into the lower tray 100B. The amount is reduced, and the contact area of the leg inner wall 23 can be reduced.

Furthermore, in the nested trays, the curved portions 70 of the trays 100A and 100B interfere with each other. In this embodiment, the inclination of the curved portion 70 is the same angle as the inclination of the leg outer wall 22, the first side wall 60, and the second side wall 61. The side walls 61 abut each other and the curved portions 70 abut each other, and further fitting (press-fitting) of the leg portions 20 of the upper tray 100A into the insertion space 26 of the lower tray 100B is restricted. This makes it easier to pull out the upper tray 100A when pulling out the upper tray 100A from the lower tray 100B.

Next, as shown in FIG. 11, when the upper tray 100A is pulled upward from the lower tray 100B with respect to the trays in the nested state, the locking claws of the transfer device are inserted into the locking holes 56 of the holder 50. In the inserted state, the mounting surface 13 of the plate portion 10 is attracted to the transfer device. At this time, as shown in FIG. 5, in the holding portions 50 of the trays 100A and 100B, air enters the gap T4 formed between the first holding side walls 54 of the trays 100A and 100B from the locking holes 56. flows in and relaxes the close contact between the upper tray 100A and the lower tray 100B.

The transfer device pulls out the upper tray 100A upward. At this time, the outer peripheral edge of the upper tray 100A in the first direction D1 may droop downward. Due to the sagging of the plate portion 10, the leg portion outer wall 22 side of the tip of the leg portion 20 of the upper tray 100A moves away from the leg portion outer wall 22 of the lower tray 100B, and the leg portion inner wall 23 side moves away from the leg portion of the lower tray 100B. Approach the inner wall 23 . In FIG. 11, the directions of deformation at the tips of the legs 20 of the upper tray 100A are indicated by black arrows.

In this embodiment, even if the tip of the leg portion 20 of the upper tray 100A is deformed, the contact between the leg inner walls 23 between the trays 100A and B is relieved by the first to third gaps T1 to T3. be done. This makes it easier to pull out the upper tray 100A when the transfer device pulls out the upper tray 100A from the lower tray 100B.

The following effects can be obtained in this embodiment described above.
In the trays in the nesting state, a first gap T1 is formed between the outer leg wall 22 and the first bulge 40 between the trays 100A and 100B, and the inner leg wall 23 between the trays 100A and 100B is formed. A second gap T2 is formed therebetween. Therefore, even if the outer peripheral edge of the upper tray 100A hangs downward when the upper tray 100A is drawn upward from the lower tray 100B, the contact between the trays is alleviated, and the upper tray 100A is pulled downward. It can be easily pulled out from the tray 100B.

In the trays in the nesting state, a third gap T3 is formed between the lower outer wall 31 of the upper tray 100A and the second bulging portion 32 of the lower tray 100B. As a result, contact between the outer walls 22 of the leg portions is relieved, and the upper tray 100A can be pulled out more easily when the upper tray 100A is pulled out upward.

The inner leg walls 24 of the trays 100A and 100B limit the amount of insertion of the leg 20 into the lower tray 100B, thereby reducing the contact area between the trays. As a result, when pulling out the upper tray 100A upward, the tray can be pulled out more easily.

In the holding portion 50 of each tray 100A, B, a gap T4 is formed between the first holding side walls 54 of the trays 100A, 100B due to the difference in gradient between the first holding side walls 54 and the second holding side walls 55 . This makes it easier to pull out the upper tray 100A upward from the lower tray 100B when pulling out the upper tray 100A upward while holding the holding portion 50 by the transfer device.

A locking hole 56 formed in the holding portion 50 communicates with a gap T4 formed between the first holding side walls 54 of the trays 100A and 100B. As a result, when the upper tray 100A is drawn upward from the lower tray 100B, air flows into the gap T4 between the holding portions 50 through the locking holes 56, making it easier to draw out the upper tray 100A.

The contact between the curved portions 70 of the trays 100A and 100B restricts the amount of insertion of the leg portion 20 of the upper tray 100A into the lower tray 100B. As a result, the first to third gaps T1 to T3 are easily formed in the nested trays. In addition, it is possible to prevent the leg portions 20 of the upper tray 100A from getting too much into the leg portions 20 of the lower tray 100B. These make it easier to pull out the upper tray 100A.

(Other Embodiments) The technology disclosed in this specification is not limited to the above-described embodiments, and can be modified in various forms without departing from the scope of the invention. For example, the following modifications are possible. is also possible.
In the embodiment described above, the leg outer wall 22 had a second bulge 32 . Alternatively, the leg outer wall 22 may not have the second bulging portion 32 and may extend from the lower outer wall 31 to the first bulging portion 40 without bulging. Further, the leg outer wall 22 may have a third swelling portion extending from the second swelling portion 32 toward the first swelling portion 40 . As a result, in the trays in the nested state, the contact between the leg outer walls 22 of the upper tray 100A and the lower tray 100B can be further alleviated, and the upper tray 100A can be directed upward and pulled out more easily. can.

In the above-described embodiment, the holding upper wall 51 of the holding portion 50 is formed with the locking hole 56 . Alternatively, the holding portion 50 may be configured to be held by the transfer device, and the locking hole 56 may not be formed.

In the present embodiment described above, the leg portion 20 extends downward at the edge of the plate portion 10 on the side of the second side 12 at a position away from the four corners. Not limited to this, one of the leg portions 20 may extend downward from the four corners of the plate portion 10 . In this case, of the legs 20 located at the four corners of the plate portion 10, the leg sidewalls 27 extending in the first direction D1 may have the same configuration as the leg outer wall 22. Furthermore, a first bulging portion 40 extending in the first direction D1 may be formed above the leg side wall 27 .

In the case where one of the legs 20 extends downward from the four corners of the plate portion 10 , the curved portion 70 may be a portion that connects the leg portion outer wall 22 and the leg portion side wall 27 . In other words, in the leg portion 20 , the corner portion connecting the leg portion outer wall 22 and the leg portion side wall 27 may be the curved portion 70 .

In the embodiment described above, tray 100 had six legs 20 . Alternatively, tray 100 may have at least four legs. Further, in the above-described embodiment, the first side 11 is longer than the second side 12, and the plurality of legs 20 are positioned farthest from the holding section 50 and are deformed when transferred by the transfer device. It extended from the edge of the second side 12 where it is easy to break. Not limited to this, the plurality of leg portions 20 may not extend from the edge of the plate portion 10 on the second side 12 side, and may extend from the edge on the first side 11 side.

In the embodiments described above, the tray 100 was provided with a curved portion 70 . Alternatively, the tray 100 may not have the curved portion 70 . Further, even if the tray 100 has the curved portion 70 , the slope of the curved portion 70 may be greater than that of the outer wall 22 of the leg portion.

DESCRIPTION OF SYMBOLS 10... Plate part 20... Leg part 21... Leg part bottom wall 22... Leg part outer wall 23... Leg part inner wall 24... Leg part middle wall 25... Opening 31... Lower outer wall 32... Second expansion Protruding portion 40 First bulging portion 50 Holding portion 51 Holding upper wall 53 Holding side wall 56 Locking hole 70 Curved portion

Claims (7)

a substantially rectangular plate in a plan view having four sides of a pair of first sides and a pair of second sides extending in a direction intersecting the first sides; A tray comprising a hollow leg having an opening,
The trays can be stacked vertically by inserting the tips of the legs into the leg openings of other trays positioned below the tray,
The legs are
a leg bottom wall;
a leg outer wall extending upward from the leg bottom wall in a direction from the center to the outer periphery of the plate;
a leg inner wall opposite the leg outer wall and extending upward from the leg bottom wall;
The leg inner wall extends upward from the leg bottom wall at a steeper slope than the leg outer wall,
a first bulging portion that extends upward from the outer wall of the leg portion and bulges in a direction from the center of the plate portion toward the outer periphery of the tray;
tray. The outer wall of the leg further comprises:
a lower outer wall extending upward from the leg bottom wall;
a second bulging portion extending between the lower outer wall and the first bulging portion and bulging in the same direction as the first bulging portion,
2. The tray according to claim 1, wherein said first bulging portion bulges outward more than said second bulging portion in a direction from the center of said plate portion toward the outer periphery of said tray. the leg extends horizontally and has a leg middle wall positioned above the leg bottom wall and below the first bulge;
3. A tray according to claim 1 or 2, wherein the leg inner wall extends between the leg bottom wall and the leg inner wall. A holding part that can be held by a transfer device is provided in the center of the plate part,
The leg portion extends downward on the outer peripheral side of the holding portion of the plate portion,
The holding part is
a retaining top wall having an upwardly facing surface;
a holding lower wall positioned below the holding upper wall;
a retention sidewall extending from the retention bottom wall toward the retention top wall;
the holding side wall has a first holding side wall and a second holding side wall formed at a position different from the first holding side wall in the direction in which the first side extends,
The tray according to any one of claims 1 to 3, wherein the first retaining sidewall extends from the lower retaining wall toward the upper retaining wall at a greater slope than the second retaining sidewall. The holding upper wall is formed with a locking hole that penetrates the holding upper wall in the vertical direction and can be locked by the transfer device,
In the holding upper wall, when a portion of the holding upper wall that is connected to the first holding side wall in the direction in which the first side extends is an inclined upper wall portion, the locking hole is formed at least in the inclined upper wall portion. 5. Tray according to claim 4. A side wall extending upward from the plate along the direction in which the four sides of the plate extend,
the leg has a leg sidewall extending between the outer leg wall and the inner leg wall;
A curved portion that curves and connects at least one of the outer wall of the leg portion, the side wall of the leg portion, and the side walls of the leg portion located above the four corners of the plate portion and located on the side of the four corners,
6. The curved portion extends in the horizontal direction from the center of the plate portion toward the outer periphery of the tray at the same gradient as the outer wall of the leg portion as it extends upward. The tray described in . When the trays are stacked vertically, a first gap is formed between the first bulging portion of the tray on the lower side and the outer wall of the leg portion of the tray on the upper side. The tray according to any one of claims 1 to 6, wherein a second gap is formed between the inner leg wall of the upper tray and the inner leg wall of the upper tray.

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