Transport container

Abstract

To provide a conveying container that is unlikely to generate noise when conveying with a roller conveyor.SOLUTION: A conveying container is a box-like container including a bottom wall 2. The bottom wall 2 has a plurality of bulges 3 that bulge to protrude downwardly and open upwardly. The plurality of bulges 3 includes a plurality of first bulges 3a arranged at intervals in one direction D1. The lowest surface of the bottom wall 2 includes a first contact surface 4 that is configured with a lower surface 30a of the plurality of first bulges 3a and a second contact surface 5 that is configured with a surface different from the lower surface 30a. At least one of the first contact surface 4 and the second contact surface 5 is located on the lowest surface of the bottom wall 2 on a line perpendicular to the one direction D1 over the entire length of the one direction D1 of the first contact surface 4.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a shipping container. [Background technology]

[0002] Patent Document 1 describes a foldable container used for transporting goods and the like.

[0003] The foldable container has a bottom wall portion on the lower surface thereof provided with lattice-shaped ribs that protrude downward. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6029999 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the folding container described in Patent Document 1 has problems in that when transported by a roller conveyor, the lattice-shaped ribs on the bottom wall repeatedly collide with the numerous rollers of the roller conveyor, which can easily cause noise and deformation of the lattice-shaped ribs.

[0006] In view of the above circumstances, an object of the present disclosure is to propose a transport container that generates less noise when transported by a roller conveyor. [Means for solving the problem]

[0007] In order to solve the above problems, one aspect of the transport container according to the present disclosure is a box-shaped transport container having a bottom wall. The bottom wall has a plurality of bulging portions that bulge outwardly and open upwardly. The plurality of bulging portions include a plurality of first bulging portions arranged at intervals in one direction. The lowermost surface of the bottom wall includes a first abutment surface formed by the lower surfaces of the plurality of first bulging portions, and a second abutment surface formed by a surface separate from the lower surface. At least one of the first abutment surface and the second abutment surface is located on the lowermost surface of the bottom wall, along the entire length of the first abutment surface in the one direction, on a line perpendicular to the one direction.

[0008] In order to solve the above-mentioned problems, another aspect of the present disclosure provides a transport container having a box-like shape and a bottom wall. The bottom wall has a lattice-shaped rib protruding downward and at least one horizontally extending protrusion protruding downward from the rib. The lowermost surface of the bottom wall is formed by the lower surface of the at least one protrusion.

[0009] In order to solve the above-mentioned problems, another aspect of the present disclosure provides a transport container having a box-shaped bottom wall. The bottom wall includes a bottom wall body constituting an upper surface of the bottom wall, a lattice-shaped rib protruding downward from the bottom wall body, and at least one abutment member fixed to at least one of the bottom wall body and the rib and extending horizontally. The lowermost surface of the bottom wall is formed by the lower surface of the at least one abutment member. [Effects of the Invention]

[0010] The transport containers of one aspect and another aspect according to the present disclosure are less likely to generate noise when transported by a roller conveyor. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1A is a perspective view showing a bottom wall of a transport container of embodiment 1 as viewed from below, and FIG. 1B is an enlarged perspective view of part A of FIG. 1A. [Figure 2]2A is a perspective view showing the bottom wall of the same as seen from above, and FIG. 2B is an enlarged perspective view showing part B of FIG. 2A. [Figure 3] 3A is a bottom view showing the bottom wall of the same, and FIG. 3B is a bottom view showing an enlarged view of part C of FIG. 3A. [Figure 4] FIG. 4 is a plan view showing the bottom wall of the same. [Figure 5] 5A is a cross-sectional view taken along line DD in FIG. 4, and FIG. 5B is a cross-sectional view taken along line EE in FIG. [Figure 6] FIG. 6 is a perspective view showing an example of a transport container having the above bottom wall. [Figure 7] FIG. 7 is an exploded perspective view showing an example of the transportation container of the same. [Figure 8] Figure 8A is a bottom view schematically showing bottom wall variation 1, Figure 8B is a bottom view schematically showing bottom wall variation 2, Figure 8C is a bottom view schematically showing bottom wall variation 3, Figure 8D is a bottom view schematically showing bottom wall variation 4, and Figure 8E is a bottom view showing bottom wall variation 5. [Figure 9] FIG. 9 is a bottom view showing a sixth modified example of the bottom wall. [Figure 10] FIG. 10 is a cross-sectional view schematically showing the bottom wall of the second embodiment. [Figure 11] FIG. 11A is a cross-sectional view schematically showing the bottom wall of embodiment 3, FIG. 11B is a cross-sectional view schematically showing bottom wall variation 7, FIG. 11C is a cross-sectional view schematically showing bottom wall variation 8, and FIG. 11D is a cross-sectional view schematically showing bottom wall variation 9. [Figure 12] FIG. 12A is a bottom view schematically showing a bottom wall variation 10, FIG. 12B is a bottom view schematically showing a bottom wall variation 11, and FIG. 12C is a bottom view schematically showing a bottom wall variation 12. DETAILED DESCRIPTION OF THE INVENTION

[0012] (Embodiment 1) 1. Overview The transport container 1 (hereinafter simply referred to as "container 1") of embodiment 1 shown in FIGS. 1A, 2A, and 6 is a box-shaped container having a bottom wall 2. The bottom wall 2 has a plurality of bulging portions 3 that bulge outward and open upward. The plurality of bulging portions 3 include a plurality of first bulging portions 3a that are arranged at intervals in one direction D1. The lowermost surface of the bottom wall 2 includes a first contact surface 4 formed by the lower surfaces 30a of the plurality of first bulging portions 3a, and a second contact surface 5 formed by a surface different from the lower surface 30a. At least one of the first contact surface 4 and the second contact surface 5 is located on a line perpendicular to the one direction D1, over the entire length of the first contact surface 4 in the one direction D1.

[0013] In the container 1 of embodiment 1 having the above configuration, when the container 1 is transported by the roller conveyor, by placing the container 1 on the roller conveyor so that the longitudinal direction (one direction D1) of the first contact surface 4 is parallel to the transport direction of the roller conveyor, at least one of the first contact surface 4 and the second contact surface 5 can be constantly in contact with each roller of the roller conveyor. Therefore, in the container 1 of embodiment 1, when the container is transported by the roller conveyor, repeated collision of each roller with the bottom wall 2 can be prevented, and noise is less likely to be generated.

[0014] 2.Details Next, the container 1 of this embodiment will be described in more detail with reference to the drawings. The container 1 is a box-shaped container having a bottom wall 2 shown in Figs. 1 to 5. In this embodiment, the bottom wall 2 is a rectangular plate. In the following, each component will be described with the longitudinal direction of the bottom wall 2 defined as the left-right direction, the lateral direction of the bottom wall 2 defined as the front-rear direction, and the thickness direction of the bottom wall 2 defined as the up-down direction.

[0015] 6 and 7 show an example of a container 1 according to this embodiment. The container 1 includes a box-shaped container body 6 having an opening 60 on its top surface, and a pair of lids 7 rotatably connected to the container body 6 so as to open and close the opening 60. First, the remaining structure of the container 1, excluding the bottom wall 2, will be described below.

[0016] 2-1. Container body In this embodiment, the container body 6 is a foldable, approximately rectangular box. The container body 6 includes a bottom wall 2, a plurality of foldable side walls 8 (four in detail) that are erected relative to the bottom wall 2, and a mouth frame 9 that is attached to the upper ends of the side walls 8 in an engageable manner. The bottom wall 2, the plurality of side walls 8, and the mouth frame 9 are each made of synthetic resin.

[0017] The four side walls 8 are composed of a pair of first side walls 8a erected at the ends along the two short sides of the bottom wall 2 (i.e., the left and right ends), and a pair of second side walls 8b erected at the ends along the two long sides of the bottom wall 2 (i.e., the front and back ends).

[0018] Each of the pair of first side walls 8a is made of a single plate material. Each of the pair of first side walls 8a is engageable with the front and rear ends of the bottom wall 2 and is also engageable with the mouth frame 9. One end (lower end) of each of the pair of first side walls 8a is provided with an engagement structure (more specifically, a recess) used for engagement with the bottom wall 2.

[0019] Each of the pair of second side walls 8b is composed of two plate materials rotatably connected to each other. Each of the pair of second side walls 8b is switchable between an assembled state in which the two plate materials are arranged like a single plate, and a folded state in which the two plate materials are stacked in the thickness direction. Each of the pair of second side walls 8b is engageable with the front and rear end portions of the bottom wall 2 and is also engageable with the opening frame 9. In the assembled state, each of the pair of second side walls 8b is erected at the front and rear end portions of the bottom wall 2. A fitting structure (more specifically, a protrusion) used for fitting with the bottom wall 2 is provided at the lower end of each of the pair of second side walls 8b.

[0020] The mouth frame 9 integrally includes a pair of short-side frames 90 engageably connected to the upper ends of the pair of first side walls 8 a, and a pair of long-side frames 91 engageably connected to the upper ends of the pair of second side walls 8 b. The upper end opening of the mouth frame 9 forms the opening 60 in the top surface of the container body 6.

[0021] A connecting portion 92 to which the pair of lids 7 are rotatably connected is provided on the upper surface of each of the pair of long-side frames 91. A protrusion 93 is provided on the upper surface of each of the pair of short-side frames 90. In this embodiment, two protrusions 93 are provided on the upper end of each of the pair of short-side frames 90.

[0022] The container body 6 can be assembled into a box shape by erecting four side walls 8 (side walls 8a, 8b) on the outer periphery of the upper surface of the bottom wall 2, engaging or fitting the bottom wall 2 with the four side walls 8, and fitting a mouth frame 9 into the upper ends of the four side walls 8.

[0023] The container body 6 can be assembled in a folded state by folding the four side walls 8 and storing them in a space surrounded by the bottom wall 2 and the opening frame 9 placed thereon.

[0024] 2-2.Pair of lids Each of the pair of lids 7 is in the shape of a substantially rectangular plate. Each of the pair of lids 7 has a connecting portion 70 that is rotatably connected to a connecting portion 92 of the mouth frame 9, a fitting hole 71 into which a protrusion 93 of the mouth frame 9 fits, and an overlapping portion 72 that overlaps the other lid 7. Each of the pair of lids 7 is formed, for example, from synthetic resin.

[0025] The pair of lids 7 are rotatably connected to the front and rear connecting portions 92 of the opening frame 9, thereby opening and closing the entire opening 60.

[0026] 2-3. Bottom wall Next, the bottom wall 2 of this embodiment will be described in more detail. FIGS. 1 to 5 show the bottom wall 2 of this embodiment. As shown in FIG. 2A , the bottom wall 2 integrally includes a rectangular plate-shaped bottom wall main body 20 constituting the main body, a rectangular frame-shaped lower frame 21 protruding upward from the outer periphery of the bottom wall main body 20, and an engagement structure 220 and a fitting structure 221 provided on the outer periphery of the top surface of the bottom wall main body 20 (the inner portion of the lower frame 21). The engagement structure 220 is provided at each of the front and rear ends of the top surface of the bottom wall main body 20. The fitting structure 221 is provided at each of the left and right ends of the top surface of the bottom wall main body 20. In this embodiment, the bottom wall 2 is an injection-molded product formed by injecting heated and molten resin material into a pair of upper and lower molds and then cooling and solidifying it.

[0027] 2A, 2B, and 4, the bottom wall 2 has a plurality of bulging portions 3 that bulge out so as to protrude downward and open upward. The plurality of bulging portions 3 are formed by bulging out a portion of the bottom wall main body 20.

[0028] The multiple bulging portions 3 include multiple first bulging portions 3a arranged at intervals in one direction D1. The multiple bulging portions 3 further include multiple second bulging portions 3b arranged at intervals in one direction. In this embodiment, the multiple first bulging portions 3a and the multiple second bulging portions 3b are arranged at both end portions (front and rear end portions) in the short side direction of the bottom wall 2. The multiple first bulging portions 3a are positioned further outward in the long side direction than the multiple second bulging portions 3b. In this embodiment, the arrangement of the multiple bulging portions 3a, 3b at one end portion in the short side direction of the bottom wall 2 is the same as the arrangement of the multiple bulging portions 3a, 3b at the other end portion in the short side direction of the bottom wall 2.

[0029] The plurality of bulging portions 3 includes a bulging portion 3c having a parallelogram shape in a plan view. The plurality of bulging portions 3 further includes a bulging portion 3d having a rectangular shape in a plan view and a bulging portion 3e having a trapezoid shape in a plan view. In this embodiment, each of the plurality of bulging portions 3 has a parallelogram shape in a plan view, a rectangular shape in a plan view, or a trapezoid shape in a plan view, that is, a quadrangle shape in a plan view.

[0030] In this embodiment, the multiple first bulge portions 3a are composed of a total of five bulge portions 3, arranged from left to right, including one bulge portion 3d that is rectangular in plan view, three bulge portions 3c that are parallelogram-shaped in plan view, and one bulge portion 3e that is trapezoidal in plan view.

[0031] In this embodiment, the multiple second bulge portions 3b are composed of a total of five bulge portions 3, arranged from left to right, including four bulge portions 3c that are parallelogram-shaped when viewed from above and one bulge portion 3d that is rectangular when viewed from above.

[0032] 2B, 5A, and 5B, each of the multiple bulging portions 3 has four side wall portions 31 protruding downward from the bottom wall main body 20 and a bottom wall portion 32 connecting the lower ends of the four side wall portions 31. Each of the four side wall portions 31 and the bottom wall portion 32 is a flat plate with a uniform thickness. The bottom wall portion 32 is thinner than the side wall portions 31.

[0033] The four side walls 31 are composed of two first side walls 31a facing each other in the front-rear direction and two second side walls 31b facing each other in the left-right direction. Each of the four side walls 31 is slightly inclined in the vertical direction so that the area of ​​the internal space formed by the four side walls 31 is wider at the top.

[0034] The lower wall portion 32 has a quadrangular shape (more specifically, a parallelogram, a trapezoid, or a rectangle) in a plan view. Four side wall portions 31 extend upward from each of the four sides of the outer periphery of the lower wall portion 32. The upper surface 320 of the lower wall portion 32 has a quadrangular shape that is one size smaller than the lower surface 321 of the lower wall portion 32. The lower surface 321 of the lower wall portion 32 constitutes the lower surface 30 of the bulge portion 3.

[0035] The bulging portion 3c, which has a parallelogram shape in a plan view, has a pair of opposite sides that are parallel to the left-right direction. In other words, in the bulging portion 3c, the two first side walls 31a that face each other in the front-rear direction are each parallel to the left-right direction. In the bulging portion 3c, the two second side walls 31b that face each other in the left-right direction are each inclined with respect to the front-rear direction so that the outer portions of the bulging portion 3c are positioned to the left in the front-rear direction.

[0036] The bulging portion 3d has a rectangular shape in a plan view and has a pair of opposite sides parallel to the left-right direction and a pair of opposite sides parallel to the front-rear direction. In other words, in the bulging portion 3d, the two first side walls 31a facing each other in the front-rear direction are each parallel to the left-right direction, and the two second side walls 31b facing each other in the left-right direction are each parallel to the front-rear direction.

[0037] The bulging portion 3e, which is trapezoidal in plan view, has a pair of opposite sides (the upper and lower bases of the trapezoid) parallel to the left-right direction, a side parallel to the front-rear direction, and a side inclined relative to the front-rear direction. In other words, in the bulging portion 3e, two first side walls 31a facing each other in the front-rear direction are parallel to the left-right direction. In the bulging portion 3e, of two second side walls 31b facing each other in the front-rear direction, the left second side wall 31b is inclined relative to the front-rear direction so that the outer portion of the left second side wall 31b is positioned further left in the front-rear direction, while the right second side wall 31b is parallel to the front-rear direction. The inclination of the left second side wall 31b of the bulging portion 3e relative to the front-rear direction is the same angle as the inclination of the two second side walls 31b of the bulging portion 3c relative to the front-rear direction.

[0038] In this embodiment, as shown in Figure 4, the multiple bulges 3a, 3b are arranged so that the first side wall portion 31a on the inner side in the front-to-rear direction of the first bulge 3a and the first side wall portion 31a on the outer side in the front-to-rear direction of the second bulge 3b are arranged alternately one by one to form a single rib extending in a straight line in the left-to-right direction.

[0039] The second side wall portion 31b on the left side of the bulging portion 3c of the plurality of first bulging portions 3a that is shaped like a parallelogram in plan view and the second side wall portion 31b on the right side of the bulging portion 3c of the plurality of second bulging portions 3b that is shaped like a parallelogram in plan view are continuous in a straight line. The second side wall portion 31b on the right side of the bulging portion 3c of the plurality of first bulging portions 3a that is shaped like a parallelogram in plan view and the second side wall portion 31b on the left side of the bulging portion 3c of the plurality of second bulging portions 3b that is shaped like a parallelogram in plan view are continuous in a straight line.

[0040] The second side wall portion 31b on the left side of the bulging portion 3e that is trapezoidal in plan view among the plurality of first bulging portions 3a and the second side wall portion 31b on the right side of the bulging portion 3c that is located at the right end of the plurality of second bulging portions 3b are continuous in a straight line. The second side wall portion 31b on the right side of the bulging portion 3e that is trapezoidal in plan view among the plurality of first bulging portions 3a and the second side wall portion 31b on the left side of the bulging portion 3d that is located at the right end of the plurality of second bulging portions 3b are continuous in a straight line.

[0041] Although the side wall portions 31 of the first bulging portion 3a and the second bulging portion 3b are continuous, the internal spaces thereof are not in communication with each other.

[0042] The lower surfaces 30a, 30b (lower surface 321 of the lower wall portion 32) of the plurality of bulging portions 3a, 3b are at the same position in the up-down direction and are positioned on the same plane (see FIG. 5B).

[0043] The lower surfaces 30a, 30b of the plurality of bulging portions 3a, 3b are arranged on the bottom wall 2 as shown in FIGS. 1A, 1B, 3A and 3B.

[0044] The lowermost surface of the bottom wall 2 includes a first contact surface 4 formed by the lower surfaces 30a of the plurality of first bulging portions 3a, and a second contact surface 5 formed by a surface separate from the lower surface 30a. In this embodiment, the second contact surface 5 is formed by the lower surfaces 30b of the plurality of second bulging portions 3b. The first contact surface 4 is located outward of the second contact surface 5 in the front-to-rear direction.

[0045] The first contact surface 4 and the second contact surface 5 are disposed at both ends (front and rear ends) in the short direction of the bottom wall 2. The contact surfaces 4, 5 at one end in the short direction of the bottom wall 2 and the contact surfaces 4, 5 at the other end in the short direction of the bottom wall 2 are disposed line-symmetrically.

[0046] At least one of the first contact surface 4 and the second contact surface 5 is located on the lowermost surface of the bottom wall 2, along the entire length of the first contact surface 4 in the direction D1, on a line perpendicular to the direction D1.

[0047] One direction D1 (i.e., the longitudinal direction) of the first abutment surface 4 is parallel to the longitudinal direction (i.e., the left-right direction) of the bottom wall 2. The first abutment surface 4 is located from one end to the other end in the longitudinal direction of the bottom wall 2. In this embodiment, the first abutment surface 4 is located away from one end (the edge of one end) and the other end (the edge of the other end) of the bottom wall 2 in the longitudinal direction.

[0048] The first abutment surface 4 and the second abutment surface 5 are parallel to each other. The second abutment surface 5 is located from one end to the other end in the longitudinal direction of the bottom wall 2. In this embodiment, the second abutment surface 5 is located away from one end (the edge of the one end) and the other end (the edge of the other end) in the longitudinal direction of the bottom wall 2. The first abutment surface 4 and the second abutment surface 5 have the same length in the left-right direction and the same position in the left-right direction.

[0049] In this embodiment, the first contact surface 4 and the second contact surface 5 are positioned continuously in the front-rear direction. That is, there is no gap between the first contact surface 4 and the second contact surface 5.

[0050] The first contact surface 4 and the second contact surface 5 have a portion that is continuous in a direction (i.e., the front-rear direction) perpendicular to the direction D1 of the first contact surface 4. In this embodiment, the obtuse-angled corners of the lower surfaces 30a of the plurality of first bulging portions 3a and the lower surfaces 30b of the plurality of second bulging portions 3b are continuous in the front-rear direction.

[0051] In this embodiment, the lower surfaces 30a of the first bulging portions 3a and the lower surfaces 30b of the second bulging portions 3b are continuous with each other not only at obtuse-angle corners but also at acute-angle corners, corners perpendicular to acute-angle corners, and right-angle corners. These corners are continuous in a direction inclined relative to the front-rear direction.

[0052] 1A and 3A, the bottom wall 2 further has downwardly protruding lattice-shaped ribs 23. The ribs 23 protrude downward from the bottom wall main body 20 (see FIG. 5A). The ribs 23 are arranged over the entire area between the two rows of bulging portions 3a, 3b at the front end of the bottom wall 2 and the two rows of bulging portions 3a, 3b at the rear end of the bottom wall 2.

[0053] In this embodiment, the ribs 23 are composed of a plurality of first ribs 230 extending in a direction inclined at an angle of 45 degrees relative to the front-rear direction, and a plurality of second ribs 231 intersecting (specifically, perpendicular to) the plurality of first ribs 230. The plurality of first ribs 230 are positioned parallel to one another at equal intervals. The plurality of second ribs 231 are positioned parallel to one another at equal intervals.

[0054] Each of the plurality of first ribs 230 and the plurality of second ribs 231 protrudes downward from the bottom wall main body 20. Each of the plurality of first ribs 230 and the plurality of second ribs 231 is shaped like a long plate, and is thinner toward the lower end (see FIG. 5A). The position of the lower end of each of the plurality of first ribs 230 and the position of the lower end of each of the plurality of second ribs 231 are the same. The lower ends of the ribs 230 and 231 are located above the contact surfaces 4 and 5. In other words, each of the first contact surface 4 and the second contact surface 5 is located below the lower end of the rib 23. Each of the contact surfaces 4 and 5 is located 0.1 to 1.0 mm below the rib 23, and more preferably 0.3 to 0.7 mm below the rib 23.

[0055] The bottom wall 2 further has lattice-shaped end ribs 24 that are provided on the left and right ends of the bottom wall main body 20 and extend in the front-to-rear direction, and lattice-shaped end ribs 25 that are provided on the front and rear ends of the bottom wall main body 20 and extend in the left-to-right direction. The end ribs 24 are provided at positions slightly spaced apart from the left and right edges of the bottom wall main body 20, and the end ribs 25 are provided at positions slightly spaced apart from the front and rear edges of the bottom wall main body 20. A plurality of bulges 3 and ribs 23 are located within the area surrounded by the left and right end ribs 24 and the front and rear end ribs 25.

[0056] The end rib 24 is composed of two vertical ribs 240 extending in the front-rear direction and multiple horizontal ribs 241 extending in the left-right direction and connecting the two vertical ribs 240. Of the two vertical ribs 240, the lower surface of the vertical rib 240a located on the inner side in the left-right direction is located lower than the lower surface of the vertical rib 240b located on the outer side in the left-right direction. In this embodiment, the lower surface of the vertical rib 240a is at the same vertical position as the lower surfaces 30 of the multiple bulging portions 3 and forms the lowermost surface of the bottom wall 2. The lower surfaces of the multiple horizontal ribs 241 are continuous with the lower surfaces of the vertical ribs 240a and 240b, forming an inclined surface that is positioned lower toward the inner side in the left-right direction. Note that the lower surfaces of some of the multiple horizontal ribs 241 may be configured to be continuous with the lower surfaces 30a and 30b of the bulging portions 3a and 3b via the lower surface of the vertical rib 240a.

[0057] 1B and 2B, the end rib 25 is composed of one horizontal rib 250 extending in the left-right direction and multiple vertical ribs 251 extending in the front-rear direction and connecting the horizontal rib 250 to an opposing rib (connecting horizontal rib 26a, described in detail later) or bulging portion 3. The lower surface of the horizontal rib 250 is located higher than the lower surfaces 30 of the multiple bulging portions 3. The lower surfaces of the multiple vertical ribs 251 are continuous with the lower surface of the horizontal rib 250 and the lower surfaces of the opposing ribs or bulging portions 3, and form an inclined surface that is positioned lower as it approaches the inner portion in the front-rear direction.

[0058] The bottom wall 2 further has a plurality of connecting horizontal ribs 26 that protrude downward from the bottom wall main body 20 and connect the plurality of bulging portions 3 adjacent in the left-right direction, and a plurality of connecting vertical ribs 27 that connect the connecting horizontal ribs 26 to the bulging portions 3 facing them. Each of the multiple connecting horizontal ribs 26 is a rib that extends in the left-right direction, and each of the multiple connecting vertical ribs 27 is a rib that extends in the front-rear direction.

[0059] The plurality of connecting lateral ribs 26 include a connecting lateral rib 26a connecting two adjacent first bulging portions 3a, and a connecting lateral rib 26b connecting two adjacent second bulging portions 3b.

[0060] The connecting horizontal rib 26a is aligned in the same line as the first side wall portions 31a on the outer sides in the front-to-rear direction of two adjacent first bulging portions 3a, connecting these two first side wall portions 31a. The lower surface of the connecting horizontal rib 26a is located at the same height as the lower surface 30a of the first bulging portions 3a, and forms the lowermost surface of the bottom wall 2.

[0061] The connecting horizontal rib 26b is aligned in the same line as the first side wall portions 31a on the inner side in the front-to-rear direction of two adjacent second bulging portions 3b, connecting these two first side wall portions 31a. The lower surface of the connecting horizontal rib 26b is located at the same height as the lower surfaces 30b of the second bulging portions 3b, and forms the lowermost surface of the bottom wall 2.

[0062] The multiple connecting vertical ribs 27 include multiple (two in this embodiment) connecting vertical ribs 27a that connect the connecting horizontal rib 26a to the opposing first side wall portion 31a on the front-to-rear outer side of the second bulging portion 3b. The multiple connecting vertical ribs 27 further include multiple (two in this embodiment) connecting vertical ribs 27b that connect the connecting horizontal rib 26b to the opposing first side wall portion 31a on the front-to-rear inner side of the first bulging portion 3a. The lower surfaces of the multiple connecting vertical ribs 27a, 27b are located higher than the lower surfaces 30a, 30b of the bulging portions 3a, 3b.

[0063] 3. Effects In the container 1 of the present embodiment described above, at least one of the first abutment surface 4 and the second abutment surface 5 is located on the lowest surface of the bottom wall 2, on a line perpendicular to the longitudinal direction from one end to the other end of the longitudinal direction of the bottom wall 2. Therefore, in the container 1 of the present embodiment, when transported by a roller conveyor, by placing the container 1 on the roller conveyor so that the longitudinal direction of the bottom wall 2 is parallel to the transport direction of the roller conveyor, at least one of the first abutment surface 4 and the second abutment surface 5 can be constantly in contact with each roller of the roller conveyor. As a result, in the container 1 of the present embodiment, repeated collisions of the rollers with the bottom wall 2 can be prevented when transported by the roller conveyor, and noise is less likely to be generated.

[0064] Furthermore, in the container 1 of this embodiment, the contact surfaces 4, 5 are configured by the lower surfaces 30a, 30b of multiple bulging portions 3a, 3b that protrude downward and open upward. Therefore, in the container 1 of this embodiment, the openings of the bulging portions 3a, 3b formed on the upper surface of the bottom wall 2 can be made smaller than when the contact surfaces 4, 5 are configured by the lower surfaces of long bulging portions. As a result, in the container 1 of this embodiment, contents contained in the container 1 are less likely to enter the bulging portions 3a, 3b.

[0065] Furthermore, in the container 1 of this embodiment, the multiple bulges 3a, 3b include a bulge 3c that is parallelogram-shaped when viewed in a plane, and therefore the opening narrows at the acute corners of the bulge 3c, making it difficult for contents contained in the container 1 to enter the bulge 3.

[0066] In addition, the container 1 of this embodiment is provided with abutment surfaces 4, 5 at both ends of the lower surface of the bottom wall 2 in the short direction, so that when transported by a roller conveyor, the two sets of abutment surfaces 4, 5 are likely to be in constant contact with each roller, reducing noise generation.

[0067] Furthermore, in the container 1 of this embodiment, the contact surfaces 4, 5 are located below the ribs 23, so that contact between each roller and the ribs 23 can be prevented during transport by the roller conveyor, thereby suppressing noise generation and deformation of the ribs 23 due to contact with the ribs 23.

[0068] Furthermore, in the container 1 of this embodiment, the lower surfaces 30a of two adjacent first bulging portions 3a are continuous via the lower surface of the connecting horizontal rib 26a, and the lower surfaces 30b of two adjacent second bulging portions 3b are continuous via the lower surface of the connecting horizontal rib 26b, and the lower surfaces of the connecting horizontal ribs 26a, 26b form the lowermost surface of the bottom wall 2. Therefore, in the container 1 of this embodiment, the lower surfaces of the connecting horizontal ribs 26a, 26 can also suppress collisions with the rollers, and noise is less likely to be generated during transport by the roller conveyor.

[0069] Furthermore, in the container 1 of this embodiment, the lower surfaces of the vertical ribs 240a of the pair of left and right end ribs 24 extend from one end to the other end in the short direction of the bottom wall 2, forming the lowest surface of the bottom wall 2. Therefore, in the container 1 of this embodiment, when the container 1 is placed on the roller conveyor so that the short direction of the bottom wall 2 is parallel to the transport direction of the roller conveyor, the lower surfaces of the vertical ribs 240a can always be in contact with each roller of the roller conveyor. As a result, the container 1 of this embodiment is less likely to generate noise when transported by the roller conveyor, regardless of the orientation of the container when placed on the roller conveyor.

[0070] Furthermore, in the container 1 of this embodiment, the lower surfaces of the horizontal ribs 241 of the left and right end ribs 24 are inclined surfaces that are continuous with the lower surfaces of the vertical ribs 240a, and the lower surfaces of the vertical ribs 251 of the front and rear end ribs 25 are inclined surfaces that are continuous with the lower surfaces 30a of the first bulging portions 3a. Therefore, in the container 1 of this embodiment, these inclined surfaces can smoothly guide each roller of the roller conveyor into contact with the contact surfaces 4, 5 or the vertical ribs 240a, reducing noise generation.

[0071] 4. Variations Next, a description will be given of modifications of the container 1 of the above-mentioned embodiment 1. The modifications described below can be combined as appropriate.

[0072] The shape and arrangement of the plurality of bulging portions 3 are not limited to those shown in FIGS. 1A and 2A.

[0073] For example, as shown in variant example 1 in Figure 8A, the multiple bulge portions 3 (bulge portions 3a, 3b) may be composed only of bulge portions 3 that are rectangular in plan view, and the lower surfaces 30a, 30b may all be rectangular (rectangular or square).

[0074] 8B, the first bulging portions 3a and the second bulging portions 3b may be arranged so as to partially overlap each other in the front-rear direction. In other words, the lower surfaces 30a and 30b of the first bulging portions 3a and the second bulging portions 3b may have a portion that is continuous in the left-right direction.

[0075] 8C, the plurality of bulging portions 3 may further include a plurality of third bulging portions 3f arranged at intervals in one direction D1 (left-right direction). The bottom wall 2 may have not only two rows but also three, four or more rows of the plurality of bulging portions 3 at each end in the short side direction.

[0076] Furthermore, as shown in variant example 4 in Figure 8D, the multiple first bulging portions 3a and the multiple second bulging portions 3b may be positioned at a distance in a direction (front-to-back direction) perpendicular to one direction D1 (left-to-right direction).

[0077] 8E, the bottom wall 2 may have a row of first bulging portions 3a at each of both ends in the short side direction, and second abutment surfaces 5 formed of band-like surfaces extending linearly in one direction D1 in front of and behind the first bulging portions 3a. The second abutment surfaces 5 may be formed by the lower surfaces of bulging portions extending from one end to the other end of the bottom wall 2 in the longitudinal direction, or may be formed by the lower surfaces of ribs extending from one end to the other end of the bottom wall 2 in the longitudinal direction.

[0078] The bottom wall 2 may also be provided with lattice-like ribs 23, as in Modification 6 shown in Fig. 9. The lattice-like ribs 23 include a plurality of horizontal ribs 232 extending in the longitudinal direction of the bottom wall 2 and a plurality of vertical ribs 233 intersecting the horizontal ribs 232 (orthogonal in this modification). The horizontal ribs 232 have a longer downward protrusion length than the vertical ribs 233. In the container 1 of Modification 6, when the container 1 is placed on a roller conveyor and transported so that the longitudinal direction of the bottom wall 2 is parallel to the transport direction of the roller conveyor, even if the contact surfaces 4 and 5 are deformed or the like and no longer constitute the lowermost surface of the bottom wall 2, the lower surfaces of the horizontal ribs 232 can always be in contact with the rollers of the roller conveyor, thereby suppressing noise generation.

[0079] The direction D1 in which the multiple first bulging portions 3a are arranged is not limited to a direction parallel to the longitudinal direction of the bottom wall 2, and may be a direction inclined relative to the longitudinal direction. The direction D1 in which the multiple first bulging portions 3a are arranged may be a direction parallel to the short-side direction of the bottom wall 2.

[0080] Furthermore, the direction in which the plurality of second bulging portions 3b are arranged is not limited to the same direction as the direction D1 in which the plurality of first bulging portions 3a are arranged, but may be a direction intersecting the direction D1.

[0081] The first contact surface 4 does not have to be located across the entire length of the bottom wall 2 from one end to the other end, and may be located on a portion of the bottom wall 2 in the length direction.

[0082] The second abutment surface 5 may be formed on a surface separate from the lower surfaces 30a of the plurality of first bulging portions 3a that constitute the first abutment surface 4, and may be formed on a surface separate from the lower surfaces 30b of the second bulging portions 3b. For example, the second abutment surface 5 may be formed on the lower surface of a rib that extends in the longitudinal direction of the bottom wall 2.

[0083] The plurality of bulging portions 3 do not necessarily have to include the bulging portion 3c having a parallelogram shape in plan view. The plurality of bulging portions 3 are not limited to a quadrangular shape in plan view, and may have other shapes.

[0084] The bottom wall 2 does not necessarily have to have the lattice-shaped ribs 23. In addition, the lower ends (lower surfaces) of the lattice-shaped ribs 23 may be at the same vertical position as the contact surfaces 4 and 5, or may form the lowermost surface of the bottom wall 2.

[0085] The container body 6 may be a box-shaped one having an opening 60 on the top surface, and is not limited to a foldable one as shown in FIGS. 6 and 7, but may also be an integrally molded product.

[0086] The container 1 may further include a cover attached to the bottom wall 2 so as to cover the upper openings of the plurality of bulging portions 3, in which case the upper surface of the bottom wall 2 can be made flat.

[0087] The bottom wall 2 may further include a cylindrical reinforcing portion (boss) that protrudes downward from the bottom wall main body 20 and is centered at the intersection of the ribs 230, 231 of the lattice-shaped ribs 23, and the underside of this reinforcing portion may be flush with the undersides of the ribs 230, 231. The center of the underside of the reinforcing portion may also be provided with a recess that is pressed by a protruding pin that presses against the bottom wall 2 during molding to release the bottom wall 2 from the mold. In this case, no step is formed between the underside of the reinforcing portion and the underside of the rib 23, which reduces noise during transport on a roller conveyor.

[0088] In addition, the bottom wall 2 does not have to have end ribs 24, 25, and in this case, it is preferable that the outer surface of each of the multiple bulge portions 3, formed by the lower wall portion 32 and the side wall portion 31, is curved or inclined rather than right-angled.

[0089] (Embodiment 2) Next, the container 1 of the second embodiment shown in Fig. 10 will be described in detail with reference to the drawings. In the following, the components of the container 1 of the second embodiment that are common to those of the first embodiment will be denoted by the same reference numerals in the drawings and detailed description thereof will be omitted, and components that differ from those of the first embodiment will be described in detail.

[0090] In the container 1 of the second embodiment, the bottom wall 2 has downwardly protruding lattice-shaped ribs 23 and at least one protruding strip 10 that protrudes downward from the ribs 23 and extends horizontally. The lowermost surface of the bottom wall 2 is formed by the lower surface 100 of the at least one protruding strip 10. The bottom wall 2 has at least one protruding strip 10 instead of multiple bulging portions 3.

[0091] In this embodiment, three protrusions 10 are formed on each of both short-side ends (front and rear ends) of the bottom wall 2. The three protrusions 10 are parallel to one another and extend in the longitudinal direction of the bottom wall 2. Each of the three protrusions 10 protrudes downward from the bottom wall main body 20 and is a solid plate. Each of the three protrusions 10 has a thickness in the front-rear direction. The thickness of the protrusions 10 may be the same as or thicker than the thickness of the ribs 230, 231 of the lattice-shaped ribs 23. Each of the multiple protrusions 10 protrudes downward from the rib 23 by 0.1 to 1.0 mm, more preferably by 0.3 to 0.7 mm.

[0092] The bottom wall 2 further includes a plurality of inclined longitudinal ribs 28 that protrude downward from the bottom wall main body 20 and have an inclined lower surface 280 that is continuous with the lower surface 100 of the protrusion 10 .

[0093] In this embodiment, the multiple inclined vertical ribs 28 include multiple first inclined vertical ribs 28a that are continuous with the protruding stripe 10 located at one end (the outer end in the front-rear direction) of the three protruding stripes 10, and multiple second inclined vertical ribs 28b that are continuous with the protruding stripe 10 located at the other end (the inner end in the front-rear direction) of the three protruding stripes 10. Note that the bottom wall 2 is provided with multiple first inclined vertical ribs 28a instead of the front and rear end ribs 25.

[0094] The lower surfaces 280 of the plurality of first inclined vertical ribs 28a are inclined so that the portions closer to the protrusion 10 (the inner portions in the front-to-rear direction) are positioned lower, and are continuous with the lower surfaces 100 of the protrusion 10. The lower surfaces 280 of the plurality of second inclined vertical ribs 28b are inclined so that the portions closer to the protrusion 10 (the outer portions in the front-to-rear direction) are positioned lower, and are continuous with the lower surfaces 100 of the protrusion 10.

[0095] The left and right ends of each of the three protrusions 10 are continuous with the vertical rib 240b (see FIG. 1A) of the end rib 24. Therefore, the lower surfaces 100 of the three protrusions 10 are continuous with the inclined lower surfaces of the horizontal ribs 241 of the end rib 24 via the lower surfaces of the vertical ribs 240b.

[0096] In the container 1 of the second embodiment described above, the lower surfaces 100 of a total of six protrusions 10 are located on the lowest surface of the bottom wall 2, from one end to the other end in the longitudinal direction of the bottom wall 2. Therefore, in the container 1 of this embodiment, when transported by a roller conveyor, the container 1 is placed on the roller conveyor so that the longitudinal direction of the bottom wall 2 is parallel to the transport direction of the roller conveyor, so that the lower surfaces 100 of the six protrusions 10 can always be in contact with each roller of the roller conveyor. This prevents the rollers from repeatedly colliding with the ribs 23 of the bottom wall 2 when transported by the roller conveyor, reducing noise generation.

[0097] The container 1 of the second embodiment described above can adopt, for example, the following modified examples as appropriate.

[0098] The number of protrusions 10 provided on the bottom wall 2 is not limited to three on each end as long as it is at least one, and may be any other number.

[0099] Furthermore, the extending direction of the protrusions 10 is not limited to the longitudinal direction of the bottom wall 2, but may be the lateral direction of the bottom wall 2, or may be a direction intersecting the longitudinal or lateral direction of the bottom wall 2.

[0100] Furthermore, the plurality of protrusions 10 provided on the bottom wall 2 do not have to be parallel to each other.

[0101] Furthermore, the at least one protrusion 10 provided on the bottom wall 2 is not limited to being located at both ends in the short side direction of the bottom wall 2, and may be located at other positions on the bottom wall 2. Furthermore, the at least one protrusion 10 may be located not only at both ends in the short side direction of the bottom wall 2, but also at the center in the short side direction of the bottom wall 2. In this case, even if the bottom wall 2 is deflected, one of the protrusions 10 can easily come into contact with each roller of the roller conveyor.

[0102] Furthermore, at least one protrusion 10 does not have to be located across the entire length of the bottom wall 2 from one end to the other, and may be located only in a portion of the length of the bottom wall 2.

[0103] Furthermore, the at least one protrusion 10 is not limited to a solid plate shape, but may have a hollow structure with an internal space.

[0104] (Embodiment 3) Next, the container 1 of embodiment 3 shown in Fig. 11A will be described in detail with reference to the drawings. In the following, among the container 1 of embodiment 3, the components common to embodiment 1 will be denoted by the same reference numerals in the drawings and detailed description will be omitted, and the components different from embodiment 1 will be described in detail.

[0105] In the container 1 of the third embodiment, the bottom wall 2 includes a bottom wall main body 20 that forms the upper surface of the bottom wall 2, lattice-shaped ribs 23 that protrude downward from the bottom wall main body 20, and at least one abutting member 11 that is fixed to at least one of the bottom wall main body 20 and the ribs 23 and extends horizontally. The lowermost surface of the bottom wall 2 is formed by a lower surface 110 of the at least one abutting member 11. The bottom wall 2 includes at least one abutting member 11 instead of multiple bulging portions 3.

[0106] In this embodiment, the bottom wall 2 is provided with two abutment members 11 extending in one horizontal direction (specifically, the left-right direction). The two abutment members 11 are fixed by welding to portions of the lattice-shaped ribs 23 that are located at both ends (front and rear ends) in the short direction of the bottom wall 2. In this embodiment, the upper surfaces of the abutment members 11 are welded to the lower surfaces of the ribs 23.

[0107] The two abutment members 11 are parallel to each other and extend in the longitudinal direction (left-right direction) of the bottom wall 2. Each of the two abutment members 11 is flat. The thickness of the abutment member 11 may be the same as or thicker than the thickness of the ribs 230, 231 of the lattice-shaped ribs 23. Each of the two abutment members 11 protrudes downward from the ribs 23 by 0.1 to 1.0 mm, and more preferably by 0.3 to 0.7 mm.

[0108] In the container 1 of the third embodiment described above, the lower surfaces 110 of the two abutment members 11 are located on the lowest surface of the bottom wall 2, spanning from one end to the other end in the longitudinal direction of the bottom wall 2. Therefore, in the container 1 of this embodiment, when transported by a roller conveyor, the container 1 is placed on the roller conveyor so that the longitudinal direction of the bottom wall 2 is parallel to the transport direction of the roller conveyor, so that the lower surfaces 110 of the two abutment members 11 can be constantly in contact with each roller of the roller conveyor. As a result, in the container 1 of this embodiment, when transported by the roller conveyor, repeated collisions of each roller with the ribs 23 of the bottom wall 2 can be prevented, and noise is less likely to be generated.

[0109] The container 1 of the above-described third embodiment can employ, for example, the following modified examples as appropriate.

[0110] The shape, fixing method, and arrangement of the contact member 11 are not limited to those shown in FIG. 11A.

[0111] 11B, the contact member 11 may have a plate-shaped main body 111 and a plurality of (three in this embodiment) connecting portions 112 protruding upward from the main body 111. In the seventh modification, the upper surfaces of the plurality of connecting portions 112 are welded to the lower surfaces of the ribs 23.

[0112] 11C , the abutting member 11 may have a plate-shaped main body 111 and two connecting portions 112 protruding upward from front and rear end portions of the main body 111. In the eighth modification, the upper surfaces of the connecting portions 112 are welded to the lower surface of the bottom wall main body 20, and the upper surface of the main body 111 is welded to the lower surface of the rib 23.

[0113] 11D, the abutting member 11 may have a plate-shaped main body 111 and a plurality of connecting portions 112 protruding upward from front and rear end portions of the main body 111 and the portion therebetween. In the 9th modification, the abutting member 11 is positioned further outward in the front-rear direction than the rib 23. The upper surfaces of the plurality of connecting portions 112 of the abutting member 11 are welded to the lower surface of the bottom wall main body 20.

[0114] Furthermore, as in Modification 10 shown in FIG. 12A, the bottom wall 2 may include two abutment members 11 arranged at both ends of the bottom wall 2 in the short direction and two abutment members 11 arranged at both ends of the bottom wall 2 in the longitudinal direction. The four abutment members 11 are connected to each other at their longitudinal ends. In other words, the four abutment members 11 are connected in a square shape. Each of the four abutment members 11 may have any of the structures shown in FIGS. 11A to 11D.

[0115] Furthermore, as in Modification 11 shown in FIG. 12B, the bottom wall 2 may include three abutment members 11 arranged at both ends and a middle portion of the bottom wall 2 in the short direction, and three abutment members 11 arranged at both ends and a middle portion of the bottom wall 2 in the long direction. The six abutment members 11 are connected at both ends and a middle portion in the long direction. In other words, the six abutment members 11 are connected in a "D" shape. Each of the six abutment members 11 may have any of the structures shown in FIGS. 11A to 11D.

[0116] Furthermore, as in Modification 12 shown in FIG. 12C, the bottom wall 2 may include two abutment members 11 arranged at positions that divide the bottom wall 2 into thirds in the lateral direction, and two abutment members 11 arranged at positions that divide the bottom wall 2 into thirds in the longitudinal direction. The four abutment members 11 are connected to one another. More specifically, the four abutment members 11 are connected in an "I" shape. Each of the four abutment members 11 may have any of the structures shown in FIGS. 11A to 11D.

[0117] Furthermore, when the abutting member 11 has a plate-shaped main body 111 and connecting portions 112 protruding upward from both ends of the main body 111, the outer surface of the corner portion formed by the main body 111 and the connecting portions 112 may be inclined or curved rather than right-angled. Similarly, when the abutting member 11 is composed only of the main body 111, both ends of the main body 111 may be provided with inclined or curved surfaces.

[0118] The bottom wall 2 may further include a rib (a rib similar to the inclined vertical rib 28 shown in FIG. 10) having an inclined lower surface that is continuous with the lower surface 110 of the abutting member 11.

[0119] The number of contact members 11 provided on the bottom wall 2 is only required to be at least one, and may be any number other than the above-mentioned two, four, and six.

[0120] The extending direction of the abutting member 11 may be a direction intersecting the longitudinal direction or the lateral direction of the bottom wall 2.

[0121] Furthermore, the plurality of contact members 11 provided on the bottom wall 2 do not have to be parallel to each other.

[0122] Furthermore, at least one abutting member 11 does not have to be positioned across the entire length of the bottom wall 2 from one end to the other end, and may be positioned only in a portion of the length of the bottom wall 2.

[0123] Furthermore, the abutment member 11 need only extend horizontally, and is not limited to extending in one horizontal direction, but may extend in two mutually perpendicular horizontal directions, and may, for example, be arranged to cover the entire lattice-shaped rib 23.

[0124] Furthermore, the abutting member 11 may be fixed to at least one of the bottom wall main body 20 and the rib 23 by a method other than welding.

[0125] In addition, the abutment surfaces 4, 5 of the bottom wall 2 of embodiment 1 and the lower surface 100 of at least one protrusion portion 10 of the bottom wall 2 of embodiment 2 may also be arranged in a "L" shape, a "D" shape, or a "I" shape when viewed from below, as in variants 10 to 12 shown in Figures 12A to 12C.

[0126] (summary) As in the first embodiment and its modifications described above, the container 1 of the first aspect has the following configuration.

[0127] That is, the container 1 of the first embodiment is a box-shaped container having a bottom wall 2. The bottom wall 2 has a plurality of bulging portions 3 that bulge outward so as to protrude downward and open upward. The plurality of bulging portions 3 include a plurality of first bulging portions 3a that are arranged at intervals in one direction D1. The lowermost surface of the bottom wall 2 includes a first abutment surface 4 that is formed by the lower surfaces 30a of the plurality of first bulging portions 3a, and a second abutment surface 5 that is formed by a surface different from the lower surface 30a. On the lowermost surface of the bottom wall 2, at least one of the first abutment surface 4 and the second abutment surface 5 is located on a line perpendicular to the one direction D1, over the entire length of the first abutment surface 4 in the one direction D1.

[0128] In the container 1 of the first embodiment having the above configuration, when the container 1 is transported by a roller conveyor, the container 1 is placed on the roller conveyor so that the longitudinal direction (one direction D1) of the first contact surface 4 is parallel to the transport direction of the roller conveyor, thereby allowing at least one of the first contact surface 4 and the second contact surface 5 to be constantly in contact with each roller of the roller conveyor. Therefore, in the container 1 of the first embodiment, when the container 1 is transported by the roller conveyor, repeated collisions of each roller with the bottom wall 2 can be prevented, reducing noise generation. In addition, in the container 1 of the first embodiment, the first contact surface 4 is formed by the lower surfaces 30a of multiple first bulges 3a. Therefore, compared to when the first contact surface 4 is formed by the lower surface of a single elongated bulge, the opening area of ​​the bulge 3a can be made smaller, and the contents contained in the container 1 are less likely to enter the bulge 3a.

[0129] As in the above-described first embodiment and its modified examples, the container 1 of the second aspect additionally comprises the following configuration in addition to the configuration of the container 1 of the first aspect.

[0130] That is, in the container 1 of the second embodiment, the plurality of bulging portions 3 further includes a plurality of second bulging portions 3b arranged at intervals in one direction. The second abutment surface 5 is formed by the lower surfaces 30b of the plurality of second bulging portions 3b.

[0131] In the second embodiment of the container 1 having the above configuration, the second abutment surface 5 is composed of the lower surfaces 30b of multiple second bulging portions 3b, so the opening area of ​​the bulging portion 3b can be made smaller than when the second abutment surface 5 is composed of the lower surface of a single long bulging portion, and the contents contained in the container 1 are less likely to enter the bulging portion 3b.

[0132] As in the first embodiment and its modifications described above, the container 1 of the third aspect additionally comprises the following configuration in addition to the configuration of the container 1 of the first or second aspect.

[0133] That is, in the container 1 of the third embodiment, the first contact surface 4 is located from one end to the other end of the bottom wall 2 in the longitudinal direction.

[0134] In the container 1 of the third embodiment having the above configuration, at least one of the first abutment surface 4 and the second abutment surface 5 can be constantly in contact with each roller of the roller conveyor from one end to the other end in the longitudinal direction of the bottom wall 2, making it less likely to generate noise when transported by the roller conveyor. Additionally, in the container 1 of the third embodiment, if the longitudinal direction of the bottom wall 2 is aligned with the transport direction of the roller conveyor, the transport direction of the roller conveyor and the longitudinal direction (one direction D1) of the first abutment surface 4 can be aligned, making it easier to load the container 1 onto the roller conveyor in a manner that makes less noise.

[0135] Furthermore, like the above-described first embodiment and its modified examples, the container 1 of the fourth aspect additionally has the following configuration in addition to the configuration of the container 1 of any one of the first to third aspects.

[0136] That is, in the container 1 of the fourth embodiment, the plurality of bulging portions 3 include a bulging portion 3c having a parallelogram shape in plan view.

[0137] In the container 1 of the fourth embodiment having the above configuration, the bulging portion 3c, which is parallelogram-shaped in plan view, has acute-angled portions where the opening narrows, making it even easier to prevent the contents from entering the bulging portion 3c.

[0138] Furthermore, like the above-described first embodiment and its modified examples, the container 1 of the fifth aspect additionally has the following configuration in addition to the configuration of the container 1 of any one of the first to fourth aspects.

[0139] That is, in the container 1 of the fifth embodiment, the bottom wall 2 further has downwardly protruding lattice-shaped ribs 23. The first contact surface 4 and the second contact surface 5 are each located below the lower ends of the ribs 23.

[0140] In the container 1 of the fifth aspect having the above configuration, the rollers of the roller conveyor can be prevented from contacting the ribs 23, and noise generation and deformation of the ribs 23 due to contact with the ribs 23 can be prevented.

[0141] Furthermore, like the second embodiment and its modifications described above, the container 1 of the sixth aspect has the following configuration.

[0142] That is, the container 1 of the sixth embodiment is a box-shaped container having a bottom wall 2. The bottom wall 2 has lattice-shaped ribs 23 that protrude downward and at least one protrusion 10 that protrudes downward from the ribs 23 and extends horizontally. The lowermost surface of the bottom wall 2 is formed by the lower surface 100 of at least one protrusion 10.

[0143] In the container 1 of the sixth embodiment having the above configuration, when the container 1 is transported by the roller conveyor, the container 1 is placed on the roller conveyor so that the longitudinal direction of at least one protrusion 10 is parallel to the transport direction of the roller conveyor, so that the underside 100 of at least one protrusion 10 is always in contact with each roller of the roller conveyor. Therefore, in the container 1 of the sixth embodiment, when the container 1 is transported by the roller conveyor, repeated collisions of the rollers with the lattice-like ribs 23 of the bottom wall 2 can be prevented, and noise is less likely to be generated.

[0144] Furthermore, like the above-described third embodiment and its modified example, the container 1 of the seventh aspect has the following configuration.

[0145] That is, the container 1 of the seventh embodiment is a box-shaped container having a bottom wall 2. The bottom wall 2 has a bottom wall main body 20 that forms the upper surface of the bottom wall 2, lattice-like ribs 23 that protrude downward from the bottom wall main body 20, and at least one abutting member 11 that is fixed to at least one of the bottom wall main body 20 and the ribs 23 and extends horizontally. The lowermost surface of the bottom wall 2 is formed by the lower surface 110 of the at least one abutting member 11.

[0146] In the container 1 of the seventh embodiment having the above configuration, when the container 1 is transported by the roller conveyor, the container 1 is placed on the roller conveyor so that the longitudinal direction of at least one abutting member 11 is parallel to the transport direction of the roller conveyor, thereby allowing the lower surface 110 of at least one abutting member 11 to be constantly in contact with each roller of the roller conveyor. Therefore, in the container 1 of the seventh embodiment, when the container is transported by the roller conveyor, repeated collisions of each roller with the lattice-like ribs 23 of the bottom wall 2 can be prevented, and noise is less likely to be generated.

[0147] Furthermore, like the above-described first to third embodiments and their modifications, the container 1 of the eighth aspect additionally has the following configuration in addition to the configuration of the container 1 of any one of the first to seventh aspects.

[0148] That is, the container 1 of the eighth embodiment is provided with a plurality of foldable side walls 8 that are erected relative to the bottom wall 2, and a mouth frame 9 that is attached to the upper ends of the plurality of side walls 8 so as to be engageable with each other.

[0149] The eighth aspect of the container 1 having the above configuration can suppress noise generation, i.e., collisions, between each roller of the roller conveyor and the bottom wall 2, making it easy to prevent the individual parts of the container 1 from being unintentionally disassembled while making the container 1 foldable.

[0150] The present disclosure has been described above based on the embodiments shown in the accompanying drawings, but the present disclosure is not limited to the above embodiments, and appropriate design changes are possible within the intended scope of the present disclosure. [Explanation of symbols]

[0151] 1 shipping container 2 bottom wall 20 Bottom wall body 23 リブ 3. Bulging part 3a First bulge 3b Second bulge 3c bulge 30a below Below 30b 4 First contact surface 5. Second joint 8. Side wall 9 mouth 10. Protruding part Below 100 11 When connecting parts and materials 110 below D1 One direction

Claims

1. A box-shaped transport container having a bottom wall, The bottom wall is The housing has a plurality of bulging portions that bulge out so as to protrude downward and open upward, the plurality of bulging portions include a plurality of first bulging portions arranged at intervals in one direction, a lowermost surface of the bottom wall includes a first abutment surface formed by lower surfaces of the plurality of first bulging portions and a second abutment surface formed by a surface separate from the lower surface, At least one of the first abutment surface and the second abutment surface is located on a line perpendicular to the one direction over the entire length of the first abutment surface in the one direction on the lowest surface of the bottom wall, The first abutment surface and the second abutment surface are positioned consecutively. A transport container characterized by:

2. The plurality of bulging portions further include a plurality of second bulging portions arranged at intervals in one direction, The second abutment surface is formed by the lower surfaces of the plurality of second bulging portions.

2. The transport container of claim 1.

3. The first abutment surface is located from one end to the other end in the longitudinal direction of the bottom wall.

3. The transport container according to claim 1 or 2.

4. The plurality of bulging portions include bulging portions having a parallelogram shape in a plan view.

4. A transport container according to any one of claims 1 to 3.

5. The bottom wall further has a lattice-shaped rib protruding downward, Each of the first abutment surface and the second abutment surface is located below a lower end of the rib.

5. A transport container according to any one of claims 1 to 4.

6. A plurality of foldable side walls erected relative to the bottom wall; a mouth frame engageably attached to the upper ends of the side walls, 6. A transport container according to any one of claims 1 to 5.

Images