JP7429026B2 - pallet container - Google Patents

Description

The present invention relates to pallet containers.

Patent Document 1 describes a prefabricated container that includes a bottom plate, four side plates standing upright around the four peripheries of the bottom plate, and outer walls that are L-shaped in plan view and provided at the four corners of the bottom plate. ing.

Each of the four side plates rotates around a shaft protruding from the bottom of both ends, allowing it to rotate between a state in which it stands up on the bottom plate and a folded state in which it lies down on the bottom plate and is stacked on top of each other. It is.

Patent No. 3294556

By the way, in the assembly type container described in Patent Document 1, when the container is transported in a folded state, there is a possibility that the shaft portion of the side plate may come off from the bottom plate.

In view of the above circumstances, an object of the present invention is to provide a pallet container that can prevent the shaft portion of the side plate from coming off the bottom portion when being transported in a folded state.

A pallet container according to one aspect of the present invention is rotatable between a bottom portion having a fork insertion portion, an upright posture in which it stands up so as to surround the space above the bottom portion, and a collapsed posture in which it lies down and is stacked on the bottom portion. and a plurality of side plates. The plurality of side plates include a first side plate and a second side plate that are adjacent to each other in the upright position. The bottom portion is provided with a connecting portion in which a first shaft portion of the first side plate and a second shaft portion of the second side plate are rotatably connected. The connecting portion includes a first longitudinal groove portion in which the first shaft portion is rotatably accommodated, and a second longitudinal groove portion in which the second shaft portion is rotatably accommodated. The first groove has an upper opening that opens upward, and the second groove has a side opening that opens laterally. The first shaft portion has a cross-sectional shape that is horizontally long when the first side plate is in the collapsed position, and vertically long when the first side plate is in the upright position, and The second shaft portion has a cross-sectional shape that is vertically long when the second side plate is in the collapsed position, and horizontally long when the second side plate is in the upright position. When the first side plate is in the laid down position, the upper opening is narrower than the first shaft when viewed from above, and when the second side plate is in the laid down position, the upper opening is narrower than the first shaft part when viewed from above, and when the second side plate is in the laid down position, As seen, the side opening is narrower than the second shaft.

Further, a pallet container according to another aspect of the present invention has a bottom portion having a fork insertion portion, an upright posture in which the container stands up so as to surround the space above the bottom portion, and a lying posture in which the pallet container lies down on the bottom portion and is piled up. A plurality of side plates rotatable therebetween. The plurality of side plates include a first side plate and a second side plate that are adjacent to each other in the upright position. The bottom portion is provided with a connecting portion in which a first shaft portion of the first side plate and a second shaft portion of the second side plate are rotatably connected. The connecting portion includes a first longitudinal groove portion in which the first shaft portion is rotatably accommodated, and a second longitudinal groove portion in which the second shaft portion is rotatably accommodated. The first groove has an upper opening that opens upward. The second groove includes a wide space located at the bottom, a narrow space located at the top and whose groove width is narrower than the wide space, and a side opening laterally from the narrow space. and an opening. The first shaft portion has a cross-sectional shape that is horizontally long when the first side plate is in the collapsed position, and vertically long when the first side plate is in the upright position. The second shaft portion has a cross-sectional shape that is horizontally long when the second side plate is in the collapsed position, and vertically long when the second side plate is in the upright position. When the first side plate is in the laid-down position, the upper opening is narrower than the first shaft portion when viewed from above, and when the second side plate is in the laid-down position, the upper opening is narrower than the first shaft portion. The space portion is narrower than the second shaft portion.

According to the pallet container of one aspect and another aspect of the present invention, it is possible to suppress the shaft portion of the side plate from coming off from the bottom portion when the pallet container is transported in a folded state.

FIG. 1 is an exploded perspective view showing the pallet container of the first embodiment. FIG. 2 is an exploded perspective view showing essential parts of the pallet container as described above. FIG. 3 is another exploded perspective view showing essential parts of the same pallet container as above. FIG. 4 is a plan view showing the main parts of the pallet container in the folded state. FIG. 5 is a perspective view showing the main parts of the pallet container in an assembled state. FIG. 6 is a plan sectional view showing the main parts of the pallet container in an assembled state. FIG. 7A is a sectional view showing the main parts of the pallet container when the second side plate is in the upright position, and FIG. 7B is a cross-sectional view showing the main parts when the second side plate is in the upright position and is floating upward. FIG. FIG. 8 is a sectional view showing a main part of the pallet container when the second side plate is lifted up from the collapsed position. FIGS. 9A to 9D are cross-sectional views of main parts sequentially showing how the second side plate is connected to the connecting portion provided in the pallet container described above. FIG. 10 is an exploded perspective view showing essential parts of the pallet container of Embodiment 2. FIG. 11 is another exploded perspective view showing essential parts of the same pallet container as above. FIG. 12A is a sectional view showing the main parts of the pallet container when the second side plate is in the upright position, and FIG. 12B is a cross-sectional view of the main parts when the second side plate is in the upright position and is floating upward. FIG. FIG. 13 is a sectional view showing the main parts when the second side plate same as above is lifted up from the collapsed position. FIGS. 14A to 14D are cross-sectional views of main parts sequentially showing how the second side plate is connected to the connecting portion provided in the pallet container described above.

1. Pallet container of Embodiment 1 1-1. Outline FIG. 1 shows an exploded view of the pallet container 1 of the first embodiment. The pallet container 1 includes a bottom portion 2 having a fork insertion portion 20, and a plurality of side plates that are rotatable between an upright position that stands up so as to surround the space above the bottom portion 2, and a collapsed position that lies on the bottom portion 2 and is stacked. 3.

The plurality of side plates 3 include a first side plate 4 and a second side plate 5 that are adjacent to each other in an upright position. The bottom portion 2 is provided with a connecting portion 6 in which the first shaft portion 40 of the first side plate 4 and the second shaft portion 50 of the second side plate 5 are rotatably connected.

As shown in FIG. 2, the connecting portion 6 includes a first vertically long groove portion 60 in which the first shaft portion 40 is rotatably accommodated, and a second vertically long groove portion 61 in which the second shaft portion 50 is rotatably accommodated. . The first groove 60 has an upper opening 62 that opens upward, and the second groove 61 has a side opening 63 that opens laterally.

The first shaft portion 40 has a cross-sectional shape that is horizontally long when the first side plate 4 is in the collapsed position, and vertically long when the first side board 4 is in the upright position. The second shaft portion 50 has a cross-sectional shape that is vertically long when the second side plate 5 is in the collapsed position and horizontally long when the second side plate 5 is in the upright position.

When the first side plate 4 is in the laid-down position, the upper opening 62 is narrower than the first shaft portion 40 when viewed from above (see FIG. 4), and when the second side plate 5 is in the laid-down position, When viewed from the side, the side opening 63 is narrower than the second shaft portion 50 (see FIG. 8).

In the pallet container 1 having the above configuration, when the first side plate 4 is in the collapsed position, the first shaft portion 40 of the first side plate 4 is prevented from coming out upward from the upper opening 62 of the first groove portion 60 of the connecting portion 6. Can be suppressed. Further, in this pallet container 1, when the second side plate 5 is in the collapsed position, the second shaft portion 50 of the second side plate 5 can escape laterally from the side opening 63 of the second groove portion 61 of the connecting portion 6. can be suppressed.

Therefore, in the pallet container 1, even if the side plates 4 and 5 are lifted up when the side plates 4 and 5 are transported in a folded state in which they are laid down on the bottom 2, the shaft portions 40 and 50 of the side plates 4 and 5 are , it is possible to prevent it from coming off the connection part 6 provided on the bottom part 2.

1-2. Details Next, each structure of the pallet container 1 of this embodiment shown in FIG. 1 will be explained in more detail. The plurality of side plates 3 included in the pallet container 1 include a pair of first side plates 4 facing each other in the upright position, and a pair of second side plates 5 facing each other in the upright position. In the following description, the direction in which the pair of first side plates 4 in the standing position face each other is referred to as the direction D1, the direction in which the pair of second side plates 5 in the standing position face each other is referred to as the direction D2, and the thickness direction of the bottom portion 2 is referred to as the up-down direction. Each configuration will be explained in terms of direction. The direction D1 and the direction D2 are directions parallel to the horizontal direction and orthogonal to each other. Note that the term "horizontal" used in the text is not limited to a strict meaning, and includes the term "horizontal."

1-2-1. Bottom Part The bottom part 2 has a rectangular outer shape in plan view. The bottom part 2 is made of synthetic resin. Note that the bottom portion 2 is not limited to being made of synthetic resin, and may be made of metal or wood.

The bottom portion 2 has four circumferentially continuous side surfaces. Two fork insertion portions 20 are formed on each of the four side surfaces at intervals in the horizontal direction. Each fork insertion part 20 is a part into which a fork of a forklift is inserted.

Two insertion holes 21 are provided in each of the four corner portions of the bottom portion 2, penetrating in the vertical direction. The lower part of the insertion hole 21 is a large-diameter hole portion having a longer hole diameter than the upper part of the insertion hole 21. A mounting hole 22 that opens upward is provided on the outer periphery of the upper surface of the bottom portion 2 . The attachment holes 22 are located in the center of the bottom 2 in the direction D2 at both ends in the direction D1, and in the center in the direction D1 at both ends in the direction D2.

The connecting portion 6 is attached to each of the four corner portions of the bottom portion 2 by a bolt 23 inserted into the insertion hole 21 and a nut 24 screwed onto the bolt 23. The nut 24 fits within the large diameter hole at the bottom of the insertion hole 21 .

1-2-2. First side plate The pair of first side plates 4 have a common structure. Below, a common structure of the pair of first side plates 4 will be explained. Moreover, below, description will be made with reference to the first side plate 4 in the upright position.

The first side plate 4 is a plate-shaped member having a longitudinal direction along the direction D2, a short direction along the up-down direction, and a thickness direction along the direction D1. The first side plate 4 is integrally molded by injection molding.

The first side plate 4 has first shaft portions 40 that protrude outward in the direction D2 at the lower end portions of both ends in the direction D2. The first shaft portion 40 has an elliptical shape, so sink marks are less likely to occur during molding, and dimensional accuracy is easily ensured. The first shaft portion 40 is provided in an elliptical cylindrical shape and is hollow.

In this embodiment, the first side plate 4 has a side plate main body 41 made of synthetic resin. As shown in FIG. 3, the side plate main body 41 includes a flat main body 410, a large number of vertical ribs 411 that protrude outward from the main body 410 in a direction D1 and are spaced apart in a direction D2, and a main body. 410 to the outside in the direction D1 and located at intervals in the vertical direction. The large number of vertical ribs 411 and the large number of horizontal ribs 412 form a lattice. The main body portion 410 is provided with a large number of holes 413 penetrating in the direction D1.

As shown in FIG. 1, in the side plate main body 41, the lower part 41a is shorter in length in the direction D2 than the upper part 41b. The lower part 41a has a plurality of (five in this embodiment) leg parts 42 located at intervals in the direction D2. From the lower end of the outer end in the direction D2 (the surface facing outside in the direction D2) of the two leg parts 42a located at both ends in the direction D2 among the plurality of leg parts 42, the first shaft part 40 protrudes outward in direction D2.

A shaft portion 43 that protrudes inward in the direction D2 is provided at the lower part of the inner end in the direction D2 (the surface facing inward in the direction D2) of each of the two leg portions 42a. The shaft portion 43 has the same shape as the first shaft portion 40 . That is, the shaft portion 43 has an elliptical cross-sectional shape, and its length in the vertical direction is longer than the length in the direction D1.

Among the plurality of legs 42, a protruding strip 44 for fitting is provided at the lower end of the remaining legs 42b excluding the two legs 42a located at both ends in the direction D2.

Locking portions 45 are provided at both ends of the upper portion 41b of the side plate main body 41 in the direction D2. The locking portion 45 is used for connection with the end of the second side plate 5 in the direction D1 when the second side plate 5 is in the upright position.

On the lower surface of the upper part 41b of the side plate main body 41, a convex portion 46 that projects downward is provided in a portion between the adjacent leg portions 42. The side plate main body 41 has a plurality of (four in this embodiment) convex portions 46 .

A first convex portion 47 that protrudes downward is provided in a portion of the lower surface of the upper portion 41b of the side plate main body 41 that is located outside the leg portion 42a in the direction D2. The first convex portions 47 are provided at both ends of the lower surface of the upper portion 41b of the side plate main body 41 in the direction D2. The first convex portion 47 is provided in a hexagonal shape in plan view (see FIG. 3).

1-2-3. Second Side Plate The pair of second side plates 5 have a common structure. Below, a common structure of the pair of second side plates 5 will be explained. Although the second side plate 5 is shown in FIG. 1 when it is in the collapsed position, the description will be made based on the second side plate 5 when it is in the upright position, in conjunction with the first side plate 4.

The second side plate 5 is a plate-shaped member having a longitudinal direction along the direction D1, a short direction along the up-down direction, and a thickness direction along the direction D2. The second side plate 5 is integrally molded by injection molding.

As shown in FIGS. 1 to 3, the second side plate 5 has second shaft portions 50 protruding outward in the direction D1 at the lower end portions of both ends in the direction D1. The second shaft portion 50 has an elliptical shape, so sink marks are less likely to occur during molding, and dimensional accuracy can be easily ensured. The second shaft portion 50 is provided in an elliptical cylindrical shape and is hollow.

In this embodiment, the second side plate 5 has a side plate main body 51 made of synthetic resin. The side plate main body 51, like the side plate main body 41 of the first side plate 4, includes a flat main body 510 and a large number of vertical ribs that protrude outward from the main body 510 in the direction D2 and are spaced apart in the direction D1. 511, and a large number of horizontal ribs 512 that protrude outward from the main body portion 510 in the direction D2 and are positioned at intervals in the vertical direction. The large number of vertical ribs 511 and the large number of horizontal ribs 512 form a lattice. The main body portion 510 is provided with a large number of holes 513 penetrating in the direction D2.

As shown in FIG. 1, the side plate main body 51 has a recess 52 at the lower end of the outer surface (the upper surface in FIG. 1). The recess 52 is a portion in which the locking portion 45 of the first side plate 4 is accommodated when the second side plate 5 and the first side plate 4 are stacked in this order on the bottom 2 in a laid-down position.

In the side plate main body 51, the lower part 51a is shorter in length in the direction D1 than the upper part 51b. The second shaft portion 50 protrudes outward in the direction D1 from the lower end portions of both end surfaces in the direction D1 of the lower portion 51a of the side plate main body 51. At both ends of the upper portion 51b of the side plate main body 51 in the direction D1, locked parts 53 are provided to which the locking parts 45 of the first side plate 4 are locked.

As shown in FIG. 3, a second convex portion 54 protruding downward is provided on the lower surface of a portion of the upper portion 51b of the side plate main body 51 located outside the lower portion 51a in the direction D1. The second convex portion 54 is a pentagonal protrusion in plan view.

The second side plate 5 includes a fall prevention piece 55 that protrudes outward in the direction D1 from an inner end in the direction D2 of both end faces in the direction D1 of the lower part 51a of the side plate main body 51, and a fall prevention piece 55 in the vertical direction. It further includes a protrusion 56 that protrudes outward in the direction D2 from the central portion.

The fall prevention piece 55 is located above the second shaft portion 50 and forms a gap S1 therebetween. The upper end of the fall prevention piece 55 is integral with the lower surface of the upper part 51b. The fall prevention piece 55 is located inside the second convex portion 54 in the direction D1.

The protrusion 56 includes a horizontal piece 560 that extends linearly in the direction D1, a vertical piece 561 that extends linearly upward from the center of the horizontal piece 560 in the direction D1, and a vertical piece 561 that extends in the direction D1. It has a plurality of horizontal ribs 562 projecting outwardly. The plurality of horizontal ribs 562 are positioned at intervals in the vertical direction. The horizontal piece portion 560 and the vertical piece portion 561 are continuous in a T-shape, and therefore have strong strength.

The horizontal piece portion 560 is located over the entire length of the fall prevention piece 55 in the direction D1. The horizontal piece portion 560 is integral with the end surface of the lower portion 51a of the side plate main body 51 in the direction D1. Each of the vertical piece portion 561 and the plurality of horizontal ribs 562 is integral with the fall prevention piece 55.

Note that the horizontal piece portion 560 and the vertical piece portion 561 may be formed in an L-shape. For example, the horizontal piece 560 is formed to be located in a part of the fall prevention piece 55 in the direction D1, and the vertical piece 561 extends upward in a straight line from the outer end of the horizontal piece 560 in the direction D1. It may be formed as follows. Further, the protruding portion 56 may be composed of only the horizontal piece portion 560.

1-2-4. Connection Portions As shown in FIG. 1, the pallet container 1 includes four connection portions 6 provided at each of the four corner portions of the bottom portion 2. As shown in FIG. In this embodiment, the two connecting portions 6 aligned in the direction D2 are integrated with an auxiliary wall 9 interposed therebetween. The two integral connecting parts 6 and the auxiliary wall 9 form a lower frame member 10.

The lower frame member 10 is attached on both ends of the bottom portion 2 in the direction D1. The length of the lower frame material 10 in the direction D2 is the same as the length of the bottom part 2 in the direction D2. The lower frame material 10 is, for example, a resin molded product.

The auxiliary wall 9 is a wall that assists in maintaining the upright posture of the first side plate 4. A plurality of (five in this embodiment) grooves 90 are provided in the auxiliary wall 9 at intervals in the direction D2. Each of the plurality of grooves 90 opens inward and upward in direction D1.

Among the plurality of grooves 90, the remaining grooves 90b located between the two grooves 90a located at both ends in the direction D2 are provided with grooves 900 at their bottom portions. The convex portion 44 of the first side plate 4 is fitted into the concave portion 900 .

A long groove-shaped groove portion 901 is provided on the wall located inside each of the two grooves 90a in the direction D2. The groove portion 901 has a symmetrical shape with respect to the first groove portion 60 of the connecting portion 6. That is, the groove portion 901 is a long groove whose longitudinal direction is the vertical direction, and has an upper opening 902 at the upper end. The groove portion 901 has the shortest width in the direction D1 at the upper opening 902 at the upper end, and the width in the direction D1 in the remaining portion excluding the upper end is longer than the width of the upper opening 902 and is constant in the vertical direction. be.

A plurality of (four in this embodiment) recesses 91 are provided on the upper surface of the auxiliary wall 9. The plurality of recesses 91 are recesses that open upward. The plurality of grooves 90 and the plurality of recesses 91 are arranged alternately one by one in the direction D2. The auxiliary wall 9 further includes a protrusion 92 that protrudes downward from the lower surface of the auxiliary wall 9 and is used for attachment to the bottom 2.

The two connecting parts 6 have a symmetrical structure. Below, the connecting portion 6 shown in FIGS. 2 and 3 will be explained in detail.

The connecting portion 6 has a substantially L-shape in plan view. The connecting portion 6 is located between a first wall portion 64 extending along the direction D2, a second wall portion 65 extending along the direction D1, and between the first wall portion 64 and the second wall portion 65. , and a third wall portion 66 forming a corner portion of the L-shaped connecting portion 6 in plan view. The third wall portion 66 includes an inner corner wall portion 660 having an arc shape in a plan view, and an outer corner wall portion 661 located outside the inner corner wall portion 660 and having an arc shape in a plan view.

The first wall portion 64 is a portion to which the first side plate 4 is connected, and the second wall portion 65 is a portion to which the second side plate 5 is connected.

The first wall portion 64 is a wall having a longitudinal direction along the up-down direction, a lateral direction along the direction D2, and a thickness direction along the direction D1. A first groove 60 and a first recess 67 are formed in the first wall 64 .

The first groove portion 60 is a long groove whose longitudinal direction is the vertical direction, and has an upper opening 62 at the upper end. The first groove portion 60 also opens inside in the direction D2. In the first groove portion 60, an opening width L1 in the direction D1 at the upper opening 62 is shorter than an opening width L2 in the direction D1 below it. In the first groove portion 60, the opening width L2 of the remaining portion excluding the upper opening 62 at the upper end is constant in the vertical direction.

The opening widths L1 and L2 correspond to the width dimension of the first shaft portion 40 of the first side plate 4 in the direction D1. The first shaft portion 40 having an elliptical cross section has a long axis with a width dimension L3 and a short axis with a width dimension L4. The length of the first shaft portion 40 in the vertical direction when the first side plate 4 is in the upright position is the width dimension L3. The length of the first shaft portion 40 in the direction D1 at this time is the width dimension L4. In other words, the length of the first shaft portion 40 in the direction D1 when the first side plate 4 is in the collapsed position is the width dimension L3 (see FIG. 4). The opening width L1 is shorter than the width dimension L3 and longer than the width dimension L4. The opening width L2 is slightly longer than the width dimension L3.

As shown in FIG. 6, the first recess 67 has an inner circumferential surface that follows the shape of the first convex portion 47, and in this embodiment is a hexagonal recess in plan view. As shown in FIGS. 3 and 4, the connecting portion 6 further includes a first through hole 68 extending downward from a portion of the bottom surface (specifically, the center portion) of the first recess 67. As shown in FIGS.

The first recess 67 and the first through hole 68 penetrate the first wall 64 in the vertical direction. A bolt 23 for attaching the connecting portion 6 to the bottom portion 2 is inserted into the first recess 67 and the first through hole 68 . The shape of the head of the bolt 23 is hexagonal, and the shape of the inner peripheral surface of the first recess 67 is a shape that also follows the shape of the head of the bolt 23. The head of the bolt 23 is received by the bottom surface of the first recess 67, and its rotation is restricted by the inner peripheral surface of the first recess 67. The shaft portion of the bolt 23 is passed through the first through hole 68 and the insertion hole 21 in the bottom portion 2 .

As shown in FIGS. 2 and 3, the second wall portion 65 has a longitudinal direction along the up-down direction, a lateral direction along the direction D1, and a thickness direction along the direction D2. It is. The second wall portion 65 is provided with a second groove portion 61, a second recess portion 69, a recess 70, and a retaining portion 71.

The second groove portion 61 is a long groove whose longitudinal direction is the vertical direction, and has a side opening 63 opening outward in the direction D2 at the upper end. The second groove portion 61 is also open inside in the direction D1. The second groove portion 61 is provided from the center portion of the second wall portion 65 in the vertical direction to the lower end portion. In the second groove portion 61, an opening width L5 in the vertical direction of the side opening 63 is narrower than an opening width L6 in the direction D2. The second groove portion 61 has a constant opening width L6 in the direction D2 over the vertical direction.

The opening widths L5 and L6 correspond to the width dimension of the second shaft portion 50 of the second side plate 5. The second shaft portion 50 having an elliptical cross section has a long axis with a width dimension L7 and a short axis with a width dimension L8. The length of the second shaft portion 50 in the direction D2 when the second side plate 5 is in the upright position is the width dimension L7. The length of the second shaft portion 50 in the vertical direction at this time is the width dimension L8. In other words, the length of the second shaft portion 50 in the vertical direction when the second side plate 5 is in the collapsed position is the width dimension L7. The opening width L5 is shorter than the width dimension L7 and longer than the width dimension L8. The opening width L6 is slightly longer than the width dimension L7.

As shown in FIG. 6, most of the shape of the inner peripheral surface of the second recess 69 follows the shape of the second convex part 54, and in this embodiment, it is a hexagonal recess in plan view. . As shown in FIGS. 3 and 4, the connecting portion 6 further includes a second through hole 72 extending downward from a portion of the bottom surface (specifically, the center portion) of the second recess 69. As shown in FIGS.

The second recess 69 and the second through hole 72 penetrate the second wall 65 in the vertical direction. A bolt 23 that fixes the connecting portion 6 to the bottom portion 2 is inserted into the second recess 69 and the second through hole 72 . The shape of the head of the bolt 23 is hexagonal, and the shape of the inner peripheral surface of the second recess 69 is a shape that follows the shape of the head of the bolt 23. The head of the bolt 23 is received by the bottom surface of the second recess 69 , and rotation is restricted by the inner peripheral surface of the second recess 69 . The shaft portion of the bolt 23 is passed through the second through hole 72 and the insertion hole 21 of the bottom portion 2 .

As shown in FIG. 2, the recess 70 is located above the second groove portion 61 and is open both inside in the direction D1 and inside in the direction D2. A retaining portion 71 is located within the recess 70 . The retaining portion 71 projects downward from the inner end in the direction D1 of the inner surface 700 facing downward of the recess 70.

The retaining portion 71 includes a vertical piece portion 710 projecting downward from the inner surface 700 and a plurality of horizontal ribs 711 projecting inward from the vertical piece portion 710 in the direction D1. The plurality of horizontal ribs 711 are positioned at intervals in the vertical direction. Each of the plurality of horizontal ribs 711 is a protrusion extending along the direction D2. Each of the vertical piece portion 710 and the plurality of horizontal ribs 711 has an outer end in the direction D2 that is integral with a surface of the recess 70 facing inward in the direction D2. The vertical piece portion 710 is continuous with the inner surface 700 in a T-shape, and therefore has high strength.

Note that the retaining portion 71 may be formed in an L-shape by consisting only of a vertical piece portion 710 and one horizontal rib 711 protruding inwardly in the direction D1 from the lower end thereof. Further, the retaining portion 71 may be composed of only the vertical piece portion 710, or may be composed of only one horizontal rib 711 located at the lower end.

The side plates 4 and 5 are connected to a connecting portion 6, as shown in FIG. FIG. 5 shows how the side plates 4 and 5 are connected to the connecting portion 6 when they are in the upright position.

At this time, in the first side plate 4, as shown in FIG. It fits. Note that FIG. 6 shows a cross section at the same level as the top surface of the connecting portion 6.

Further, at this time, in the second side plate 5, as shown in FIG. 7A, the second shaft portion 50 fits within the second groove portion 61 of the connecting portion 6, and the protruding portion 56 fits within the recess 70 of the connecting portion 6. At this time, the horizontal piece 560 of the protruding part 56 is located below the retaining part 71 of the connecting part 6, and the fall prevention piece 55 has its lower part facing the direction D2 of the second wall part 65 of the connecting part 6. Located on the inside. At this time, the distance L9 in the vertical direction from the horizontal piece part 560 of the protruding part 56 to the retaining part 71 is shorter than the distance L10 in the vertical direction from the second shaft part 50 to the upper wall 610 of the second groove part 61. The distance L9 is longer than the vertical length L11 (FIG. 7B) of the second convex portion 54. The second side plate 5 is located inside in the direction D1 from the outer end of the first side plate 4 in the direction D2.

By connecting the side plates 4 and 5 to the connecting portion 6 in this manner, the first side plate 4 is prevented from falling down from the standing position to both sides in the direction D1, and the second side plate 5 is prevented from falling down from the standing position. This prevents the robot from falling to both sides in the direction D2.

Further, when the second side plate 5 in the upright position is lifted up due to vibrations caused during conveyance of the pallet container 1, the horizontal piece 560 of the protruding portion 56 is moved to the retaining portion 71 of the connecting portion 6, as shown in FIG. 7B. By hitting the second side plate 5, upward movement is restricted. At this time, as shown in FIG. 7A, since the distance L9 is shorter than the distance L10, the second side plate 5 in the upright position reaches the position where the second shaft portion 50 faces the side opening 63 of the second groove portion 61. Prevented from moving. This can prevent the second shaft portion 50 from slipping out of the second groove portion 61 of the connecting portion 6 when the second side plate 5 is in the upright position. Note that since the distance L9 is longer than the vertical length L11 (FIG. 7B) of the second convex portion 54, the second side plate 5 in the upright position can be moved to a position where the second convex portion 54 comes out of the second concave portion 69. It is.

Furthermore, the side plates 4 and 5 are connected to a connecting portion 6, as shown in FIG. In addition, in FIG. 4, the side plates 4 and 5 are displayed in different colors in order to make them easier to understand. FIG. 4 shows how the side plates 4 and 5 are connected to the connecting portion 6 when they are in the collapsed position.

At this time, the first shaft portion 40 of the first side plate 4 fits within the first groove portion 60 of the connecting portion 6 . The width dimension L3 of the first shaft portion 40 in the direction D1 is longer than the opening width L1 of the upper opening 62 of the first groove portion 60. The first side plate 4 is located above the second side plate 5.

Further, at this time, the second shaft portion 50 of the second side plate 5 fits within the second groove portion 61 of the connecting portion 6 . The vertical width dimension L7 of the second shaft portion 50 is longer than the opening width L5 of the side opening 63 of the second groove portion 61 (see FIG. 8).

By connecting the side plates 4 and 5 to the connecting part 6 in this way, even if the side plates 4 and 5 in the lying position are lifted up due to vibrations generated during transportation, the first shaft part 40 can be connected to the connecting part 6. can be suppressed from slipping out upwardly from the upper opening 62. Further, it is possible to suppress the second shaft portion 50 from slipping out laterally from the side opening 63 of the connecting portion 6.

1-3. Assembly Method Next, an example of a method for assembling the above-mentioned pallet container 1 will be described.

First, the lower frame member 10 is attached on both ends of the bottom portion 2 in the direction D1. The lower frame material 10 is fixed to the bottom part 2 by inserting bolts 23 from above into the recesses 67, 69, through holes 68, 72, and insertion holes 21, 21 of the connecting part 6, and inserting nuts 24 into the lower part of the bolts 23. This is done by tightening the screws.

Next, the second side plate 5 is connected to the two connecting parts 6 aligned in the direction D1. As shown in FIGS. 9A and 9B, the second side plate 5 is in a position where the second side plate 5 is slightly tilted from the upright position, and the gap between the second shaft portion 50 of the second side plate 5 and the fall prevention piece 55 is The upper part of the second wall part 65 of the connecting part 6 is passed through S1. Next, as shown in FIGS. 9C and 9D, the second shaft part 50 of the second side plate 5 is inserted into the second groove part 61 through the side opening 63, and the second side plate 5 is stacked on the bottom part 2. Note that in FIGS. 9A to 9D, illustrations of the bottom portion 2, the first side plate 4, and the walls 64 and 66 of the connecting portion 6 are omitted.

By doing as described above, the second side plate 5 is stacked on the bottom part 2 in a lying position. Each of the pair of second side plates 5 is connected to the connecting part 6 in a similar manner and stacked on the bottom part 2 in a lying position. The pair of second side plates 5 are stacked on the upper surface of the bottom portion 2 and are located apart from each other in the direction D2.

Next, the first side plate 4 in the upright position is dropped into the lower frame member 10 from above. At this time, the first shaft portion 40 of the first side plate 4 in the upright position is inserted into the first groove portion 60 through the upper opening 62 of the first groove portion 60 of the connecting portion 6, and the plurality of legs 40 of the first side plate 4 are inserted into the plurality of grooves 90 of the auxiliary wall 9. Further, the shaft portion 43 of the first side plate 4 is inserted into the groove portion 901 through the upper opening 902 of the groove portion 901 of the auxiliary wall 9, and the convex strip portion 44 of the first side plate 4 is inserted into the groove portion 900 of the auxiliary wall 9. Fitted in. Further, the first convex portion 47 of the first side plate 4 fits into the first concave portion 67 of the connecting portion 6, and the plurality of convex portions 46 of the first side plate 4 fit into the plurality of concave portions 91 of the auxiliary wall 9. As a result, the first side plate 4 is supported in an upright position by the lower frame member 10, that is, the two connecting portions 6 and the auxiliary wall 9. At this time, the plurality of convex parts 46 of the first side plate 4 fit into the plurality of recesses 91 of the auxiliary wall 9, so that the central part of the first side plate 4 in the direction D2 protrudes outward or inward in the direction D1. It is possible to suppress the swelling.

The first side plate 4 in the upright position is moved upward from the state supported by the lower frame member 10 and rotated inward in the direction D1 around the shaft parts 40 and 43, thereby changing the second side plate 5 in the collapsed position. It can be placed in a prone position, stacked on top of each other.

Each of the pair of first side plates 4 is connected to the connecting portion 6 (lower frame member 10) in a similar manner, and can be rotated from an upright position to a collapsed position. The pair of first side plates 4 are stacked on the pair of second side plates 5 and are located apart from each other in the direction D1. At this time, the locking portions 45 of the pair of first side plates 4 fit into the recesses 52 of the pair of second side plates 5, so that the pair of first side plates 4 and the pair of second side plates 5 are stacked in parallel. The height is suppressed, and the positional shift of the first side plate 4 with respect to the second side plate 5 is suppressed.

As described above, the pallet container 1 can be brought into a folded state in which the side plates 4 and 5 are stacked on the bottom 2 in a lying down position.

Next, an example of a method for assembling the folded pallet container 1 into a box shape will be described.

First, each of the pair of first side plates 4 in the collapsed position is rotated outward in the direction D1 around the first shaft portion 40 to stand up on the lower frame member 10. Each of the pair of first side plates 4 stands up as the first convex portion 47 of the first side plate 4 fits into the first recess 67 of the connecting portion 6, and the standing posture is maintained. Also, at this time, the protruding strips 44 of the plurality of legs 42 of the first side plate 4 are fitted into the concave strips 900 of the auxiliary wall 9, and the plurality of protrusions 46 of the first side plate 4 are fitted into the plurality of protrusions 46 of the auxiliary wall 9. By being accommodated in the recess 91, the maintenance of the standing posture is assisted.

Next, the pair of second side plates 5 in the collapsed position are rotated outward in the direction D2 around the second shaft portion 50, and the second convex portion 54 of the second side plate 5 is inserted into the second concave portion 69 of the connecting portion 6. Contain. By rotating the second side plate 5 from the collapsed position to the upright position, the locked parts 53 at both ends of the second side board 5 are connected to the locking parts 45 at both ends of the pair of first side plates 4. It is locked. Thereby, the side ends of the first side plate 4 and the second side plate 5 in the upright position are directly connected to each other.

As described above, the pallet container 1 can be assembled into a box-like state in which the pair of first side plates 4 and the pair of second side plates 5 stand up on the outer periphery of the bottom part 2.

In the assembled pallet container 1, the horizontal piece portion 560 of the protruding portion 56 of the second side plate 5 in the upright position is located below the retaining portion 71 of the connecting portion 6 (see FIG. 7A). Therefore, even if the second side plate 5 lifts upward due to vibrations caused when the pallet container 1 is transported, the horizontal piece 560 of the protruding portion 56 of the second side plate 5 will not hit the retaining portion 71 of the connecting portion 6. Thus, upward movement of the second side plate 5 is restricted (see FIG. 7B). As a result, in this pallet container 1, the second shaft portion 50 of the second side plate 5 in the upright position can be prevented from reaching the side opening 63 of the connecting portion 6, and the second shaft portion of the second side plate 5 can be prevented from reaching the side opening 63 of the connecting portion 6. 50 can be prevented from coming off from the connecting portion 6. Also, at this time, since the first side plate 4 is connected to the second side plate 5 by the locking part 45, the first shaft part 40 of the first side plate 4 in the upright position is connected to the first groove part 60 of the connecting part 6. It can also be suppressed from slipping out upward from the upper opening 62.

1-4. Effects In the pallet container 1 of the first embodiment described above, as shown in FIG. , which is narrower than the first shaft portion 40 of the first side plate 4.

Therefore, in the pallet container 1 of the first embodiment, when the pallet container 1 in the folded state is transported, the first shaft portion 40 of the first side plate 4 in the collapsed position 62 can be prevented from slipping upward.

Further, in the pallet container 1 of the first embodiment, as shown in FIG. 8, when the second side plate 5 is in the collapsed position, the side opening 63 of the second groove 61 of the connecting portion 6 is It is narrower than the second shaft portion 50 of the second side plate 5.

Therefore, in the pallet container 1 of the first embodiment, when the pallet container 1 in the folded state is transported, the second shaft portion 50 of the second side plate 5 in the collapsed position It is possible to prevent it from slipping out laterally from the opening 63.

In addition, in the pallet container 1 of Embodiment 1, when the second side plate 5 is in the collapsed position, there is a wall (upper wall 610) above the second shaft portion 50 of the second side plate 5; The wall 610) can restrict the upward movement of the second side plate 5 in the collapsed position.

In addition, in the pallet container 1 of Embodiment 1, since the first side plate 4 in the laid-down position is located above the second side plate 5 in the laid-down position (see FIG. 4), the second side plate 5 in the laid-down position is It is suppressed by the first side plate 4 in the lying position and is difficult to lift up.

Furthermore, in the pallet container 1 of the first embodiment, as shown in FIG. Since the width is narrower than the upper opening 62 of the first groove part 60, it is easy to attach and detach the first groove part 60 to and from the connecting part 6.

Further, in the pallet container 1 of the first embodiment, as shown in FIG. 7A, when the second side plate 5 is in the upright position, the retaining part 71 of the connecting part 6 is located above the horizontal piece part 560 of the protruding part 56. Because of this position, upward movement of the second side plate 5 when in the upright position can be restricted.

In addition, in the pallet container 1 of Embodiment 1, as shown in FIG. 7B, the second shaft portion 50 of the second side plate 5 is lower than the side opening 63 when the protrusion portion 56 is in contact with the retaining portion 71. To position.

Therefore, in the pallet container 1 of the first embodiment, the second shaft portion 50 of the second side plate 5 in the upright position can be prevented from coming off from the side opening 63.

In addition, in the pallet container 1 of the first embodiment, the first side plate 4 and the second side plate 5 in the upright position are connected to each other by the engagement of the locking portion 45 and the locked portion 53 at their side ends. ing.

Therefore, in the pallet container 1 of the first embodiment, lifting of the first side plate 4 in the upright position can be suppressed by connection with the second side plate 5 in the upright position. Furthermore, since the side ends of the side plates 4 and 5 in the upright position are connected, the first side plate 4 can prevent the second side plate 5 in the upright position from falling inward in the direction D2.

In addition, in the pallet container 1 of the first embodiment, as shown in FIG. 6, the connecting portion 6 has a first recess 67 in which the first convex portion 47 of the first side plate 4 is accommodated when in the upright position, and It has a second recess 69 in which the second convex portion 54 of the second side plate 5 is accommodated at a certain time.

Therefore, in the pallet container 1 of Embodiment 1, the posture of the side plates 4 and 5 in the upright posture can be maintained by the connecting portion 6, and the first side plate 4 in the upright posture can be prevented from falling to both sides in the direction D1, and the first side plate 4 can be kept in the upright posture. The connecting portion 6 can prevent a certain second side plate 5 from falling to both sides in the direction D2.

Further, in the pallet container 1 of the first embodiment, as shown in FIG. 4, the through holes 68 and 72 extend downward from a part of the bottom surface of the recesses 67 and 69 of the connecting portion 6, so these configurations are as follows. It can be used as a fixing hole into which a bolt 23 for fixing the connecting part 6 to the bottom part 2 is inserted.

Therefore, in the pallet container 1 of Embodiment 1, in addition to the structure (recesses 67, 69) for supporting the convex parts 47, 54 of the side plates 4, 5, the connecting part 6 has holes for fixing them to the bottom part 2. The connecting portion 6 can be provided more compactly than when the connecting portion 6 is provided.

Further, in the pallet container 1 of the first embodiment, as shown in FIG. 7A, the second side plate 5 has a fall prevention piece located inside the second wall portion 65 of the connecting portion 6 in the direction D2 when the second side plate 5 is in the upright position. It has 55.

Therefore, in the pallet container 1 of the first embodiment, the fall prevention piece 55 hits the second wall part 65 of the connecting part 6, so that the second side plate 5 in the upright position can be prevented from falling outward in the direction D2. .

Further, in the pallet container 1 of the first embodiment, the second side plate 5 releases the connection to the connection part 6 only when it is tilted at an angle as shown in FIG. 9C with respect to the second wall part 65 of the connection part 6. Therefore, the second side plate 5 is difficult to come off from the connecting portion 6.

1-5. Modification Next, a modification of the pallet container 1 of the first embodiment described above will be described.

The pallet container 1 may not include the auxiliary wall 9, that is, the two connecting portions 6 arranged in the direction D2 may be separate from each other. In this case, the first side plate 4 can omit the plurality of leg parts 42 and the plurality of convex parts 46, and can have a simple shape such as a rectangular plate shape.

Further, the first side plate 4 and the second side plate 5 may have a structure in which the side end portions are connected to each other in the standing posture, and the structure for the connection is the locking part 45 and the locked part shown in FIG. It is not limited to section 53. For example, a lock pin that can be protruded and retracted is provided in the upper part of the side end of one of the first side plate 4 and the second side plate 5, and a lock hole into which the lock pin is caught is provided in the corresponding part of the other side plate. The side ends of the first side plate 4 and the second side plate 5 may be connected to each other by operating the first side plate 4 and the second side plate 5. In this case, each of the first side plate 4 and the second side plate 5 can omit the locking part 45, the locked part 53, and the recess 52, and can have a simple shape such as a rectangular plate shape.

Further, the method of attaching the connecting part 6 to the bottom part 2 is not limited to the method using bolts 23 and nuts 24, but also the method of providing a locking structure such as a claw on the bottom part 2 and the connecting part 6 and fixing it by locking. , it is also possible to adopt a method of fixing using a locking member other than the bolt 23 and nut 24.

Further, in the connecting portion 6, instead of the through holes 68 and 72, a through hole into which the bolt 23 is inserted is provided in a portion between the recesses 67 and 69 (third wall portion 66), so that one bolt 23 is inserted. It may be fixed to the bottom part 2 with.

The first side plate 4 is composed of a plate-shaped main body and a pair of separate corner members attached to the lower end portions of both sides of the main body. and a first convex portion 47 may be provided. Similarly, the second side plate 5 is composed of a plate-shaped main body and a pair of separate corner members attached to the lower ends of both ends of the main body, and a second shaft is attached to the pair of corner members. The portion 50 and the second convex portion 54 may be provided.

Moreover, the first side plate 4 may be a plate-shaped member having a longitudinal direction along the up-down direction and a transversal direction along the direction D2. Further, the second side plate 5 may be a plate-shaped member having a longitudinal direction along the up-down direction and a transversal direction along the direction D1.

Further, each of the side plate bodies 41 and 51 of the side plates 4 and 5 may be made of a hollow plate member having a honeycomb structure and a steel plate (aluminum plate) attached to both sides of the hollow plate member in the thickness direction. In addition, instead of the honeycomb structure, the hollow plate material has a structure in which hollow parts are formed in a line like the holes of a harmonica by extrusion molding, a structure in which many pillars are arranged side by side, and a structure in which many pyramids such as cones are arranged in a row. It is possible to adopt the structure set forth above, or it is also possible to adopt other structures. Further, the hollow plate material may have a structure in which no steel plate is attached.

Further, the first convex portion 47 is not limited to a hexagonal shape in plan view, and may be a polygon other than a hexagonal shape or a substantially circular shape. Further, the shape of the second convex portion 54 in plan view is not limited to a pentagon, but may be a polygon other than a pentagon or a substantially circular shape.

Further, the horizontal piece portion 560 may be formed thicker than the fall prevention piece 55, and in this case, the horizontal piece portion 560 can be reinforced.

Further, the second side plate 5 may include a vertically long reinforcing rib that protrudes outward in the direction D2 from a portion of the fall prevention piece 55 below the horizontal piece portion 560. The reinforcing rib is provided, for example, at the center of the fall prevention piece 55 in the direction D1. In this case, an accommodation groove in which the reinforcing rib fits is provided in a portion of the surface of the second wall portion 65 of the connecting portion 6 facing inward in the direction D2 that corresponds to the reinforcing rib.

Further, each of the first shaft portion 40 and the second shaft portion 50 may have a bottomed cylindrical shape with a closed end in the protruding direction (axial direction). In this case, the shaft portions 40 and 50 are reinforced. I can figure it out.

Further, the first shaft portion 40 may have a cross-sectional shape that is horizontally long when the first side plate 4 is in the collapsed position and vertically long when the first side plate 4 is in the upright position. , this cross-sectional shape is not limited to an ellipse. The cross-sectional shape of the first shaft portion 40 is a virtual ellipse that is horizontally long when the first side plate 4 is in the collapsed position and vertically long when the first side plate 4 is in the upright position. The shape may be such that at least a portion of the outer surface of the first shaft portion 40 is located on a virtual ellipse. For example, the cross-sectional shape of the first shaft portion 40 may be a shape in which two rectangles of different lengths cross at right angles, a shape in which two rectangles with the same length intersect in an X-shape, or a shape in which two circles cross at right angles. The shapes may be arranged at intervals in the lateral direction of the one side plate 4.

Similarly, the second shaft portion 50 has a cross-sectional shape that is elongated vertically when the second side plate 5 is in the collapsed position and elongated horizontally when the second side plate 5 is in the upright position. However, this cross-sectional shape is not limited to an ellipse. The cross-sectional shape of the second shaft portion 50 is a virtual ellipse that is elongated vertically when the second side plate 5 is in the lying position and elongated horizontally when the second side plate 5 is in the upright position. The shape may be such that at least a portion of the outer surface of the second shaft portion 50 is located on a virtual ellipse. For example, the cross-sectional shape of the second shaft portion 50 may be a shape in which two rectangles of different lengths cross at right angles, a shape in which two rectangles with the same length intersect in an X-shape, or a shape in which two circles cross at right angles. The shape may be spaced apart in the thickness direction of the second side plate 5.

2. Pallet container 1A of Embodiment 2 The pallet container 1A of Embodiment 2 is different from the pallet container 1 of Embodiment 1 in that the direction of the long axis (longitudinal direction) of the second shaft portion 50A of the second side plate 5A and the connecting portion 6A are different from each other. The shape of the second groove portion 61A is different, and the other configurations are the same. In the following description, regarding each configuration of the pallet container 1A of Embodiment 2, the same components as those of the pallet container 1 of Embodiment 1 are given the same reference numerals in the drawings, detailed explanations are omitted, and the pallet container 1A of Embodiment 1 is A structure different from that of the container 1 will be explained in detail.

As shown in FIGS. 10 and 11, the second side plate 5A has a second shaft portion 50A having an elliptical cross-sectional shape that is vertically elongated when the second side plate 5A is in the upright position. In other words, the second side plate 5A has a second shaft portion 50A having an elliptical cross-sectional shape that is horizontally elongated when the second side plate 5A is in the collapsed position (see FIGS. 13 and 14D). The second side plate 5A is different from the second side plate 5 of the first embodiment in that the direction (longitudinal direction) of the long axis of the second shaft portion 50A is different from the direction of the long axis of the second shaft portion 50 by 90 degrees, The rest of the configuration is the same.

As shown in FIG. 11, the second shaft portion 50A has a long axis with a width dimension L7 and a short axis with a width dimension L8. The length of the second shaft portion 50A in the direction D2 when the second side plate 5A is in the upright position is the width dimension L8, and the length of the second shaft portion 50A in the vertical direction at this time is the width dimension L7. be. As shown in FIG. 13, the length of the second shaft portion 50A in the direction D2 when the second side plate 5A is in the collapsed position is the width dimension L7.

As shown in FIG. 10, the connecting portion 6A has a second groove portion 61A, which is a long groove whose longitudinal direction is the vertical direction, and has a second groove portion 61A with different groove widths in the direction D2 at the upper and lower portions. The connecting portion 6A has the same configuration as the connecting portion 6 of Embodiment 1, although the shape of the second groove portion 61A is different from the shape of the second groove portion 61.

The second groove 61A includes a wide space 611 located at the bottom of the second groove 61A, a narrow space 612 located at the top of the second groove 61 and having a narrower groove width than the wide space 611, and It has a side opening 63 that opens from the top of the space 612 to the side (specifically, to the outside in direction D2).

The wide space portion 611 and the narrow space portion 612 are arranged in the vertical direction and are connected (communicated) to each other. Each of the wide space portion 611 and the narrow space portion 612 has a constant opening width in the direction D2 over the vertical direction.

As shown in FIG. 13, the opening width L12 of the wide space part 611 in the direction D2 is longer than the opening width L13 of the narrow space part 612 in the direction D2, and is wider than the width dimension L7 of the long axis of the second shaft part 50A. Slightly long. The opening width L13 of the narrow space portion 612 in the direction D2 is shorter than the width L7 of the long axis of the second shaft portion 50A and longer than the width L8 of the short axis of the second shaft portion 50A.

The side opening 63 opens outward in the direction D2 from a portion extending from the upper end of the narrow space portion 612 of the second groove portion 61A to the center portion in the vertical direction. The vertical opening width L5 of the side opening 63 is shorter than the length of the narrow space 612 in the vertical direction. Further, the opening width L5 of the side opening 63 is shorter than the width L7 of the long axis of the second shaft portion 50A, and longer than the width L8 of the short axis of the second shaft portion 50A.

FIG. 12A shows how the second side plate 5A and the connecting portion 6A are connected in the upright position. The second side plate 5A is connected to the connecting portion 6A by fitting the second shaft portion 50A into the wide space 611 of the second groove portion 61A of the connecting portion 6A and by fitting the protruding portion 56 into the recess 70 of the connecting portion 6A. has been done. At this time, a portion of the fall prevention piece 55 of the second side plate 5A that is lower than the horizontal piece portion 560 is inserted into the recess 650 provided on the inner surface in the direction D2 of the second wall portion 65 of the connecting portion 6A. It fits. The recess 650 has a vertical length corresponding to a portion of the fall prevention piece 55 below the horizontal piece portion 560. Therefore, when the second side plate 5A is in the upright position, the inner surface of the anti-falling piece 55 in the direction D2 and the inner surface of the second wall part 65 in the direction D2, a portion lower than the recess 650. are flush with each other, forming a flat surface with almost no steps.

If the second side plate 5A in the upright position is lifted up due to vibrations or the like during the transportation of the pallet container 1A, the horizontal piece 560 of the protruding portion 56 will move against the retaining portion 71 of the connecting portion 6A, as shown in FIG. 12B. By hitting this, upward movement of the second side plate 5A is restricted. Thereby, when the second side plate 5A is in the upright position, the second shaft portion 50A can be prevented from slipping out from the side opening 63 of the second groove portion 61A of the connecting portion 6A.

FIG. 13 shows how the second side plate 5A in the laid down position is connected to the connecting portion 6A when it is lifted up due to vibrations or the like generated during transport of the pallet container 1A. In the second side plate 5A, the second shaft portion 50A is accommodated within the wide space portion 611 of the second groove portion 61A of the connecting portion 6A. Here, the opening width L13 of the narrow space portion 612 of the second groove portion 61A in the direction D2 is shorter than the width dimension L7 of the second shaft portion 50A in the direction D2. In other words, when the second side plate 5A is in the collapsed position, the narrow space portion 612 is narrower than the second shaft portion 50A. Therefore, if the second side plate 5A in the collapsed position is lifted up due to vibrations generated during transportation, the second shaft portion 50A will hit the downward stepped surface located at the boundary between the wide space portion 611 and the narrow space portion 612. In this way, it is possible to suppress entry into the narrow space portion 612. As a result, it is possible to suppress the second shaft portion 50A from slipping out laterally from the side opening 63.

An example of how the second side plate 5A is connected to the connecting portion 6A is shown in FIGS. 14A to 14D. As shown in FIGS. 14A and 14B, the second side plate 5A is in a position where the second side plate 5A is slightly tilted from the upright position, and there is a gap between the second shaft portion 50A of the second side plate 5A and the fall prevention piece 55. The upper part of the second wall part 65 of the connecting part 6A is passed through S1. Next, as shown in FIG. 14C, the second side plate 5A is tilted to an angle such that the vertical length of the second shaft portion 50A is equal to or less than the opening width L5 of the side opening 63, and the second shaft portion 50A is It is inserted through the opening 63 into the narrow space 612 of the second groove 61A. Next, the second side plate 5A is rotated within the narrow space 612 to an angle at which the length of the second shaft portion 50A in the direction D2 is equal to or less than the opening width L13 of the narrow space 612. Next, the second side plate 5A is moved downward and the second shaft portion 50A is inserted into the wide space portion 611 of the second groove portion 61A. Next, the second side plate 5A is rotated to a lying position and stacked on the bottom part 2.

In the pallet container 1A of the second embodiment described above, when the second side plate 5A is in the collapsed position, the second shaft portion 50A of the second side plate 5A is wide from the wide space portion 611 of the second groove portion 61A of the connecting portion 6A. Movement into the narrow space 612 can be suppressed, and as a result, the second shaft part 50A can be suppressed from slipping out laterally from the side opening 63.

In addition, in the pallet container 1A, when the second side plate 5A is in the collapsed position, the second shaft portion 50A of the second side plate 5A and the side wall of the wide space portion 611 of the second groove portion 61A (wall in direction D2) The gap between them can be made small, and lateral displacement of the second side plate 5A can be suppressed.

In addition, in the pallet container 1A, an inner wall portion of the second wall portion 65 located inside the second groove portion 61 in the direction D2 and an outer wall portion located outside of the second groove portion 61 in the direction D2 are connected to the second groove portion 65. It is formed thicker than the lower wall portion located below 61A. Therefore, in the pallet container 1A, the strength of the portion of the second side plate 5A that is in contact with the second shaft portion 50A when the second side plate 5A is in the collapsed position is improved.

In addition, the pallet container 1A of Embodiment 2 can also have the effect similar to the effect of the pallet container 1 of Embodiment 1 mentioned above. Moreover, the same modification as the modification of the pallet container 1 of Embodiment 1 mentioned above can be employ|adopted also about 1 A of pallet containers of Embodiment 2.

In addition, in the pallet container 1A of the second embodiment, two walls of the first wall 64 located on both sides of the first groove 60 in the direction D1 are replaced with two walls of the second wall 65 located on both sides of the second groove 61A. It may be formed thicker than the two wall portions located on both sides in the direction D2. In this case, it is possible to improve the strength of the two wall portions of the first wall portion 64 that are longer in the vertical direction than the two side walls of the second wall portion 65 and do not have a curved surface (step). Further, in this case, when the first side plate 4 is in the upright position, the gap between the first shaft portion 40 of the first side plate 4 and the two walls of the first wall portion 64 can be made small, and the first side plate 4 can be suppressed. Note that the two walls of the first wall portion 64 are formed to be thicker than the two walls of the second groove portion 61A only in the portion below the vertically intermediate portion of the first groove portion 60. Good too.

In addition, in the pallet container 1A of the second embodiment, the inner wall portion of the second wall portion 65 is located inside the second groove portion 61 in the direction D2, and the outer wall portion is located outside of the second groove portion 61 in the direction D2. , the upper wall portion may be formed thicker than the upper wall portion located above the second groove portion 61A for reinforcement.

Further, the pallet container 1A of the second embodiment may have the following configuration so that the first side plate 4 can be slightly tilted outward in the direction D1 from the vertical upright position.

For example, a projection projecting downward may be provided at the inner end of the lower surface of the leg portion 42a in the direction D1. Further, the lower surface of the leg portion 42a may be provided on an inclined surface such that the inner part in the direction D1 is located lower. Further, the first shaft portion 40 may be provided with a protrusion that protrudes downward from the inner side in the direction D1 so as to protrude downward from the inner end of the lower surface of the leg portion 42a in the direction D1. Further, the upper surface of the bottom wall portion of the first wall portion 64 located below the first groove portion 60 may be provided as an inclined surface such that the inner side in the direction D1 is located higher. Further, these configurations may be combined.

When the above configuration is provided, it is possible to prevent the second side plate 5A, which changes the posture between the standing posture and the lying posture, from coming into contact with the first side plate 4, which is tilted outward in the direction D1 from the standing posture. can.

3. Summary The pallet container 1 of the first embodiment described above has the following first configuration.

That is, the pallet container 1 of Embodiment 1 has a bottom portion 2 having a fork insertion portion 20, an upright posture in which it stands up so as to surround the space above the bottom portion 2, and a collapsed posture in which it lies down on the bottom portion 2 and is piled up. A plurality of rotatable side plates 3 are provided.

The plurality of side plates 3 include a first side plate 4 and a second side plate 5 that are adjacent to each other in an upright position. The bottom portion 2 is provided with a connecting portion 6 in which the first shaft portion 40 of the first side plate 4 and the second shaft portion 50 of the second side plate 5 are rotatably connected.

The connecting portion 6 has a first longitudinal groove portion 60 in which the first shaft portion 40 is rotatably accommodated, and a second longitudinal groove portion 61 in which the second shaft portion 50 is rotatably accommodated. The first groove 60 has an upper opening 62 that opens upward, and the second groove 61 has a side opening 63 that opens laterally.

The first shaft portion 40 has a cross-sectional shape that is horizontally long when the first side plate 4 is in the collapsed position, and vertically long when the first side board 4 is in the upright position. The second shaft portion 50 has a cross-sectional shape that is vertically long when the second side plate 5 is in the collapsed position and horizontally long when the second side plate 5 is in the upright position.

The upper opening 62 is narrower than the first shaft portion 40 when viewed from above when the first side plate 4 is in the laid down position, and when viewed from the side when the second side plate 5 is in the laid down position. , the side opening 63 is narrower than the second shaft portion 50.

By providing the above first configuration, in the pallet container 1 of the first embodiment, when the first side plate 4 is in the collapsed position, the first shaft portion 40 of the first side plate 4 is connected to the first groove of the connecting portion 6. 60 can be prevented from slipping out upward from the upper opening 62. In addition, in the pallet container 1 of the first embodiment, when the second side plate 5 is in the collapsed position, the second shaft portion 50 of the second side plate 5 is moved laterally from the side opening 63 of the second groove portion 61 of the connecting portion 6. It is possible to prevent it from slipping out. As a result, in the pallet container 1 of the first embodiment, even if the side plates 4 and 5 are lifted up when the side plates 4 and 5 are transported in a folded state on the bottom part 2, the shaft parts 40 and 50 of the side plates 4 and 5 are However, it can be suppressed from coming off from the connection part 6 provided on the bottom part 2.

Furthermore, the pallet container 1A of the second embodiment described above has the following second configuration.

That is, the pallet container 1A of the second embodiment has a bottom portion 2 having a fork insertion portion 20, an upright posture in which it stands up so as to surround the space above the bottom portion 2, and a collapsed posture in which it lies down on the bottom portion 2 and is stacked. A plurality of rotatable side plates 3 are provided.

The plurality of side plates 3 include a first side plate 4 and a second side plate 5A that are adjacent to each other in an upright position. The bottom portion 2 is provided with a connecting portion 6A in which the first shaft portion 40 of the first side plate 4 and the second shaft portion 50A of the second side plate 5A are rotatably connected.

The connecting portion 6A has a vertically long first groove portion 60 in which the first shaft portion 40 is rotatably housed, and a vertically long second groove portion 61A in which the second shaft portion 50A is rotatably housed. The first groove portion 60 has an upper opening 62 that opens upward.

The second groove portion 61A includes a wide space portion 611 located at the bottom, a narrow space portion 612 located at the top and having a groove width narrower than the wide space portion 611, and an opening toward the side from the narrow space portion 612. It has a side opening 63.

The first shaft portion 40 has a cross-sectional shape that is horizontally long when the first side plate 4 is in the collapsed position, and vertically long when the first side board 4 is in the upright position. The second shaft portion 50A has a cross-sectional shape that is horizontally long when the second side plate 5A is in the collapsed position, and vertically long when the second side plate 5 is in the upright position.

When the first side plate 4 is in the laid down position, the upper opening 62 is narrower than the first shaft part 40 when seen from above, and when the second side plate 5A is in the laid down position, the narrow space part 612 is narrower than the first shaft part 40. is narrower than the second shaft portion 50A.

By providing the above second configuration, in the pallet container 1A of the second embodiment, when the first side plate 4 is in the collapsed position, the first shaft portion 40 of the first side plate 4 is connected to the first groove of the connecting portion 6. 60 can be prevented from slipping out upward from the upper opening 62. In addition, in the pallet container 1A of the second embodiment, when the second side plate 5A is in the collapsed position, the second shaft portion 50A of the second side plate 5A extends from the wide space portion 611 of the second groove portion 61A of the connecting portion 6A. It is possible to prevent the second shaft portion 50A from moving toward the space portion 612, and as a result, it is possible to prevent the second shaft portion 50A from slipping out laterally from the side opening 63.

Therefore, in the pallet container 1A of the second embodiment, even if the side plates 4, 5A are lifted up when the side plates 4, 5A are transported in a folded state in which they are laid down on the bottom 2 and stacked, the shafts of the side plates 4, 5A are 40, 50A can be prevented from coming off from the connection part 6A provided on the bottom part 2.

In addition, in the pallet container 1A of the second embodiment, when the second side plate 5A is in the collapsed position, the gap between the second shaft portion 50A of the second side plate 5A and the side wall of the wide space portion 611 of the second groove portion 61 is The gap can be made small, and lateral displacement of the second side plate 5A can be suppressed.

Moreover, the pallet containers 1 and 1A of Embodiments 1 and 2 are provided with the following third structure in addition to the above-mentioned first or second structure.

That is, in the pallet containers 1 and 1A of Embodiments 1 and 2, the connecting parts 6 and 6A have the retaining part 71. The second side plates 5, 5A have a protrusion 56 located below the retaining part 71 when the second side plates 5, 5A are in the upright position.

By providing the above-mentioned third configuration, in the pallet containers 1 and 1A of the first and second embodiments, even if the second side plates 5 and 5A rise above the bottom part 2 when the second side plates 5 and 5A are in the upright position, the retaining part 71 The upward movement of the second side plates 5, 5A can be stopped by the protrusion 56 coming into contact with the second side plates 5, 5A. As a result, in the pallet containers 1 and 1A of Embodiments 1 and 2, when the first side plates 4 and the second side plates 5 and 5A are transported in an assembled state standing up on the bottom 2, the second side plates 5 and 5A are lifted up. Even if this happens, the second shaft portions 50, 50A of the second side plates 5, 5A can be prevented from coming off from the connecting portions 6, 6A provided on the bottom portion 2.

Although the embodiments have been described above, the pallet container is not limited to the embodiments described above, and it is possible to make appropriate design changes or to combine known techniques.

1, 1A Pallet container 2 Bottom part 20 Fork insertion part 3 Side plate 4 First side plate 40 First shaft part 5, 5A Second side plate 50, 50A Second shaft part 6, 6A Connection part 60 First groove part 61, 61A Second groove part 611 Wide space portion 612 Narrow space portion 62 Top opening 63 Side opening 56 Projection portion 71 Retaining portion

Claims (8)

a bottom portion having a fork insertion portion;
comprising a plurality of side plates that are rotatable between an upright position that stands up so as to surround the space above the bottom and a laid down position that lies down and is stacked on the bottom;
The plurality of side plates include a first side plate and a second side plate that are adjacent to each other in the upright position,
The bottom portion is provided with a connecting portion in which a first shaft portion of the first side plate and a second shaft portion of the second side plate are rotatably connected;
The connecting portion has a first vertically long groove portion in which the first shaft portion is rotatably housed, and a second vertically long groove portion in which the second shaft portion is rotatably housed;
The first groove portion has an upper opening that opens upward,
The second groove has a side opening that opens laterally,
The first shaft portion has a cross-sectional shape that is horizontally long when the first side plate is in the collapsed position, and vertically long when the first side plate is in the upright position,
The second shaft portion has a cross-sectional shape that is vertically long when the second side plate is in the collapsed position and horizontally long when the second side plate is in the upright position,
When the first side plate is in the collapsed position, the upper opening is narrower than the first shaft when viewed from above,
When the second side plate is in the collapsed position, the side opening is narrower than the second shaft when viewed from the side,
When the first side plate is in the upright position, the first shaft portion is located inside the upper opening when viewed from above, and the first shaft portion is narrower than the upper opening. Features pallet containers. a bottom portion having a fork insertion portion;
comprising a plurality of side plates that are rotatable between an upright position that stands up so as to surround the space above the bottom and a laid down position that lies down and is stacked on the bottom;
The plurality of side plates include a first side plate and a second side plate that are adjacent to each other in the upright position,
The bottom portion is provided with a connecting portion in which a first shaft portion of the first side plate and a second shaft portion of the second side plate are rotatably connected;
The connecting portion has a first vertically long groove portion in which the first shaft portion is rotatably housed, and a second vertically long groove portion in which the second shaft portion is rotatably housed;
The first groove portion has an upper opening that opens upward,
The second groove includes a wide space located at the bottom, a narrow space located at the top and whose groove width is narrower than the wide space, and a side opening laterally from the narrow space. and an opening;
The first shaft portion has a cross-sectional shape that is horizontally long when the first side plate is in the collapsed position, and vertically long when the first side plate is in the upright position,
The second shaft portion has a cross-sectional shape that is horizontally long when the second side plate is in the collapsed position, and vertically long when the second side plate is in the upright position,
When the first side plate is in the collapsed position, the upper opening is narrower than the first shaft when viewed from above,
When the second side plate is in the collapsed position, the narrow space portion is narrower than the second shaft portion,
When the first side plate is in the upright position, the first shaft portion is located inside the upper opening when viewed from above, and the first shaft portion is narrower than the upper opening. Features pallet containers. a bottom portion having a fork insertion portion;
comprising a plurality of side plates that are rotatable between an upright position that stands up so as to surround the space above the bottom and a laid down position that lies down and is stacked on the bottom;
The plurality of side plates include a first side plate and a second side plate that are adjacent to each other in the upright position,
The bottom portion is provided with a connecting portion in which a first shaft portion of the first side plate and a second shaft portion of the second side plate are rotatably connected;
The connecting portion has a first vertically long groove portion in which the first shaft portion is rotatably housed, and a second vertically long groove portion in which the second shaft portion is rotatably housed;
The first groove portion has an upper opening that opens upward;
The second groove has a side opening that opens laterally,
The first shaft portion has a cross-sectional shape that is horizontally long when the first side plate is in the collapsed position, and vertically long when the first side plate is in the upright position,
The second shaft portion has a cross-sectional shape that is vertically long when the second side plate is in the collapsed position and horizontally long when the second side plate is in the upright position,
When the first side plate is in the collapsed position, the upper opening is narrower than the first shaft when viewed from above,
When the second side plate is in the collapsed position, the side opening is narrower than the second shaft when viewed from the side,
The connecting portion has a retaining portion,
A pallet characterized in that the second side plate has a protruding portion located below the retaining portion and above the side opening when the second side plate is in the upright position. container. a bottom portion having a fork insertion portion;
comprising a plurality of side plates that are rotatable between an upright position that stands up so as to surround the space above the bottom and a laid down position that lies down and is stacked on the bottom;
The plurality of side plates include a first side plate and a second side plate that are adjacent to each other in the upright position,
The bottom portion is provided with a connecting portion in which a first shaft portion of the first side plate and a second shaft portion of the second side plate are rotatably connected;
The connecting portion has a first vertically long groove portion in which the first shaft portion is rotatably housed, and a second vertically long groove portion in which the second shaft portion is rotatably housed;
The first groove portion has an upper opening that opens upward,
The second groove includes a wide space located at the bottom, a narrow space located at the top and whose groove width is narrower than the wide space, and a side opening laterally from the narrow space. and an opening;
The first shaft portion has a cross-sectional shape that is horizontally long when the first side plate is in the collapsed position, and vertically long when the first side plate is in the upright position,
The second shaft portion has a cross-sectional shape that is horizontally long when the second side plate is in the collapsed position, and vertically long when the second side plate is in the upright position,
When the first side plate is in the collapsed position, the upper opening is narrower than the first shaft when viewed from above,
When the second side plate is in the collapsed position, the narrow space portion is narrower than the second shaft portion,
The connecting portion has a retaining portion,
The pallet container is characterized in that the second side plate has a protruding part located below the retaining part and above the side opening when the second side plate is in the upright position. a bottom portion having a fork insertion portion;
comprising a plurality of side plates that are rotatable between an upright position that stands up so as to surround the space above the bottom and a laid down position that lies down and is stacked on the bottom;
The plurality of side plates include a first side plate and a second side plate that are adjacent to each other in the upright position,
The bottom portion is provided with a connecting portion in which a first shaft portion of the first side plate and a second shaft portion of the second side plate are rotatably connected;
The connecting portion has a first vertically long groove portion in which the first shaft portion is rotatably housed, and a second vertically long groove portion in which the second shaft portion is rotatably housed;
The first groove portion has an upper opening that opens upward,
The second groove has a side opening that opens laterally,
The first shaft portion has a cross-sectional shape that is horizontally long when the first side plate is in the collapsed position, and vertically long when the first side plate is in the upright position,
The second shaft portion has a cross-sectional shape that is vertically long when the second side plate is in the collapsed position and horizontally long when the second side plate is in the upright position,
When the first side plate is in the collapsed position, the upper opening is narrower than the first shaft when viewed from above,
When the second side plate is in the collapsed position, the side opening is narrower than the second shaft when viewed from the side,
A pallet container characterized in that the upper opening is located above the side opening. a bottom portion having a fork insertion portion;
comprising a plurality of side plates that are rotatable between an upright position that stands up so as to surround the space above the bottom and a laid down position that lies down and is stacked on the bottom;
The plurality of side plates include a first side plate and a second side plate that are adjacent to each other in the upright position,
The bottom portion is provided with a connecting portion in which a first shaft portion of the first side plate and a second shaft portion of the second side plate are rotatably connected;
The connecting portion has a first vertically long groove portion in which the first shaft portion is rotatably housed, and a second vertically long groove portion in which the second shaft portion is rotatably housed;
The first groove portion has an upper opening that opens upward,
The second groove includes a wide space located at the bottom, a narrow space located at the top and whose groove width is narrower than the wide space, and a side opening laterally from the narrow space. and an opening;
The first shaft portion has a cross-sectional shape that is horizontally long when the first side plate is in the collapsed position, and vertically long when the first side plate is in the upright position,
The second shaft portion has a cross-sectional shape that is horizontally long when the second side plate is in the collapsed position, and vertically long when the second side plate is in the upright position,
When the first side plate is in the collapsed position, the upper opening is narrower than the first shaft when viewed from above,
When the second side plate is in the collapsed position, the narrow space portion is narrower than the second shaft portion,
A pallet container characterized in that the upper opening is located above the side opening. a bottom portion having a fork insertion portion;
comprising a plurality of side plates that are rotatable between an upright position that stands up so as to surround the space above the bottom and a laid down position that lies down and is stacked on the bottom;
The plurality of side plates include a first side plate and a second side plate that are adjacent to each other in the upright position,
The bottom portion is provided with a connecting portion in which a first shaft portion of the first side plate and a second shaft portion of the second side plate are rotatably connected;
The connecting portion has a first vertically long groove portion in which the first shaft portion is rotatably housed, and a second vertically long groove portion in which the second shaft portion is rotatably housed;
The first groove portion has an upper opening that opens upward,
The second groove has a side opening that opens laterally,
The first shaft portion has a cross-sectional shape that is horizontally long when the first side plate is in the collapsed position, and vertically long when the first side plate is in the upright position,
The second shaft portion has a cross-sectional shape that is vertically long when the second side plate is in the collapsed position and horizontally long when the second side plate is in the upright position,
When the first side plate is in the collapsed position, the upper opening is narrower than the first shaft when viewed from above,
When the second side plate is in the collapsed position, the side opening is narrower than the second shaft when viewed from the side,
The upper surface of the connecting part has at least one recess,
A pallet container, wherein at least one of the first side plate and the second side plate has a convex portion that fits within the at least one concave portion when in the upright position. a bottom portion having a fork insertion portion;
comprising a plurality of side plates that are rotatable between an upright position that stands up so as to surround the space above the bottom and a laid down position that lies down and is stacked on the bottom;
The plurality of side plates include a first side plate and a second side plate that are adjacent to each other in the upright position,
The bottom portion is provided with a connecting portion in which a first shaft portion of the first side plate and a second shaft portion of the second side plate are rotatably connected;
The connecting portion has a first vertically long groove portion in which the first shaft portion is rotatably housed, and a second vertically long groove portion in which the second shaft portion is rotatably housed;
The first groove portion has an upper opening that opens upward,
The second groove includes a wide space located at the bottom, a narrow space located at the top and having a groove width narrower than the wide space, and a side opening laterally from the narrow space. and an opening;
The first shaft portion has a cross-sectional shape that is horizontally long when the first side plate is in the collapsed position, and vertically long when the first side plate is in the upright position,
The second shaft portion has a cross-sectional shape that is horizontally long when the second side plate is in the collapsed position, and vertically long when the second side plate is in the upright position,
When the first side plate is in the collapsed position, the upper opening is narrower than the first shaft when viewed from above,
When the second side plate is in the collapsed position, the narrow space portion is narrower than the second shaft portion,
The upper surface of the connecting part has at least one recess,
A pallet container, wherein at least one of the first side plate and the second side plate has a convex portion that fits within the at least one concave portion when in the upright position.

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