AU2018317258B2

AU2018317258B2 - Corrugated plate for container and container having same

Info

Publication number: AU2018317258B2
Application number: AU2018317258A
Authority: AU
Inventors: Chunjian Dong; Feng Wang; Yimei WU; Qi Zhang
Original assignee: China International Marine Containers Group Co Ltd; Nantong CIMC Special Transportation Equipment Manufacture Co Ltd; CIMC Containers Holding Co Ltd
Current assignee: China International Marine Containers Group Co Ltd; Nantong CIMC Special Transportation Equipment Manufacture Co Ltd; CIMC Containers Holding Co Ltd
Priority date: 2017-08-15
Filing date: 2018-06-29
Publication date: 2021-06-24
Anticipated expiration: 2038-06-29
Also published as: DE112018004168T5; WO2019033861A1; AU2018317258A1; CN109398986A; CN109398986B; AU2018317258C1

Abstract

A corrugated plate for a container and a container having the plate. The corrugated plate for a container comprises multiple trough portions (23) and multiple crest portions (21). The crest portions and the trough portions are disposed alternately along a lengthwise direction of the container, and each crest is connected to an adjacent trough by a slope portion (22). The corrugated plate for a container comprises multiple connected corrugations. Each corrugation comprises, sequentially connected, a slope portion, a crest portion, a slope portion, and a trough portion. An average length of the multiple corrugations is 300-600 mm. The total length of the trough portions is 0.8-1.2 times the total length of the crest portions, or the total length of the crest portions is 0.8-1.2 times the total length of the trough portions. The lengths of the crest portions and/or the trough portions of the corrugated plate for a container are adjusted to reduce the number of corrugations, reducing the weight of a container. The total length of the trough portions is substantially equal to the total length of the crest portions, improving flatness and bending-resistant rigidity, and reducing steel consumption and pressing workload.

Description

CORRUGATED PLATE FOR CONTAINER AND CONTAINER HAVING SAME TECHNICAL FIELD

[0001] The present disclosure relates to the field of mechanics, and particularly relates to a corrugated plate for container and a container having same.

BACKGROUND

[0002] Containers, as a means of intermodal transportation for international logistics, are applied in increasingly wider fields and relate to increasingly more industries. The

requirements on containers are becoming increasingly higher, and the container bodies are

desired to have a smaller self-weight and a larger load capacity. However, the current relevant

standards of container transportation lay relative limitations on the shapes and dimensions of

containers, which affects the further optimization of containers.

[0003] In accordance with the requirements by the relevant standards such as ISO, the strength, flexural rigidity and so on of the container body of containers must conform to the

transportation conditions of relevant sea transportation, highway transportation, railway

transportation and so on. On the basis of that, containers have been always developing in the

trend of light weight and maximum carrying capacity. However, currently most of the four

corrugated plates of containers employ the wave-shaped structure (for short the wave plate

structure) to improve the strength of the four corrugated plates and the esthetics of the formed

corrugated plates (for example increasing the flatness), but the conventional wave plate

structures are not the optimum corrugated plate structure, the quantities of the corrugations

are excessively large, and the weights are excessively large.

[0004] Therefore, it is required to provide a container corrugated plate and a container having it, to at least partially solve the above problems.

SUMMARY

[0005] A series of concepts in the simplified form are introduced into the section of

SUMMARY, which will be described in further details in the section of DETAILED

DESCRIPTION. The section of SUMMARY of the present disclosure is not intended to attempt to limit the critical features and essential technical features of the claimed technical solutions, and is not intended to attempt to define the protection scopes of the claimed technical solutions.

[0006] In order to at least partially solve the above problems, the present disclosure discloses a container corrugated plate for a 20' container, wherein the container corrugated plate comprises a plurality of trough portions and a plurality of crest portions, and the crest portions and the trough portions are provided sequentially in a length direction of the container and neighboring crest portion and trough portion are connected by bevel portions, wherein the container corrugated plate comprises a plurality of connected corrugations, each of the corrugations comprises one of the trough portions, one of the bevel portions, one of the crest portions, one of the bevel portions and one of the trough portions, all of which are sequentially connected, lengths of the neighboring trough portions of two neighboring corrugations are equal, an average length of the plurality of corrugations is 300-600mm, and one of a total length of the trough portions and a total length of the crest portions is 0.8-1.2 times the other of the total length of the trough portions and the total length of the crest portions, and a height difference between the crest portion and the trough portion that neighbors the crest portion is 20mm-60mm, and the container corrugated plate has 15 of the corrugations.

[0007] The container corrugated plate according to the present disclosure, by adjusting the length of the crest portions and/or the trough portions, reduces the quantity of the corrugations, and correspondingly reduces the weight of the container body. Moreover, the substantially equal total lengths of the trough portions and the crest portions result in better control on the flatness, which increases the flexural rigidity and so on, and reduces the consumption of steel and the labor for pressing.

[0008] Optionally, the average length of the plurality of corrugations of the container corrugated plate is 330-450mm.

[0009] Optionally, the crest portion and the trough portion are parallel.

[0010] Optionally, the bevel portion forms an obtuse angle with a crest portion that neighbors the bevel portion, and the bevel portion forms an obtuse angle with a trough portion that neighbors the bevel portion.

[0011] [intentionally deleted]

[0012] Optionally, height differences between different crest portions and the respective trough portion that neighbors the respective crest portion are not totally equal.

[0013] Optionally, the crest portion, the bevel portion and the trough portion are formed integrally by pressing.

[0014] Optionally, in each of the corrugations a length of the crest portion and a length of the trough portion are equal.

[0015] Optionally, the total length of the plurality of crest portions of the container corrugated plate is equal to the total length of the trough portions of the container corrugated

plate, lengths of the crest portions in different ones of the corrugations are not totally equal,

and lengths of the trough portions in different ones of the corrugations are not totally equal.

[0016] Optionally, an average length of the corrugations is 372mm.

[0017] According to another aspect of the present disclosure, there is provided a container, comprising the above-described container corrugated plate.

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings of the embodiments of the present disclosure serve as

part of the present disclosure and are used for the understanding of the present disclosure.

The drawings show the embodiments of the present disclosure and the description thereon,

which are used to interpret the principle of the present disclosure. In the drawings,

[0019] Fig. 1 is a schematic section view of a conventional container corrugated plate;

[0020] Fig. 2 is a schematic section view of the container corrugated plate wherein the length of the trough portions has been changed;

[0021] Fig. 3 is a schematic section view of the container corrugated plate according to the first embodiment of the present disclosure; and

[0022] Fig. 4 is a schematic section view of the container corrugated plate according to

the second embodiment of the present disclosure.

DETAILED DESCRIPTION

[0023] In the following description, a large quantity of particular details are given so as

to provide a more thorough understanding of the present disclosure. However, it is apparent to a person skilled in the art that the embodiments of the present disclosure can be implemented without one or more of those details. In some other examples, in order to avoid confusion with the embodiments of the present disclosure, some technical features that are well known in the art are not described.

[0024] In order to thoroughly know the embodiments of the present disclosure, detailed structures will be proposed in the following description. Apparently, the implementing of the embodiments of the present disclosure is not limited to the particular details that are well known by a person skilled in the art. The preferable embodiments of the present disclosure are in detail described as follows, but besides those detailed descriptions, the present disclosure can also have other embodiments.

[0025] As shown in Fig. 3, the present disclosure provides a container corrugated plate. The container corrugated plate comprises a plurality of trough portions and a plurality of crest portions. The crest portions and the trough portions are provided sequentially in the length direction of the container and neighboring crest portion and trough portion are connected by a bevel portion. The container corrugated plate comprises a plurality of connected corrugations. Each of the corrugations comprises the bevel portion, the crest portion, the bevel portion and the trough portion that are sequentially connected. The average length of the plurality of corrugations is 300-600mm. One of the total length of the trough portions and the total length of the crest portions is 0.8-1.2 times the other of the total length of the trough portions and the total length of the crest portions.

[0026] The container corrugated plate according to the present disclosure, by adjusting the length of the crest portions and/or the trough portions, reduces the quantity of the corrugations, and correspondingly reduces the weight of the container body. Moreover, the substantially equal total lengths of the trough portions and the crest portions result in a better control on the flatness, which increases the flexural rigidity and so on, and reduces the consumption of steel and the labor for pressing. The container corrugated plate may be a side-wall structure, a local side-wall-plate structure (for example, maybe a single four-wave plate), an end-wall plate, a local end-wall-plate structure, a door-plate structure, a top-plate structure, and so on, of the entire body. Furthermore, the corrugated-plate structure may also be the top-plate structure of a similar pressing die.

[0027] It should be noted that, the trough portion in the corrugations used herein refers to the trough portion between two bevel portions, and because the two ends of the container

corrugated plate are shorter trough portions, the length of the non-complete corrugation that

is more outer than the last one complete corrugation (that is, a bevel portion, a trough portion,

a bevel portion and the shorter trough portion) may be added to the length of the shorter

trough portion located at one end of the first complete corrugation, which is deemed to form a

complete corrugation length.

[0028] Optionally, the total length of the crest portions may be equal to or approximately equal to the total length of the trough portions. Accordingly, the strength of the

container corrugated plate can be increased.

[0029] As shown in Fig. 3, in order to facilitate the manufacturing and increase the strength, the crest portion may be parallel to the trough portion. Moreover, the bevel portion

forms an obtuse angle with a crest portion that neighbors the bevel portion, and the bevel

portion forms an obtuse angle with a trough portion that neighbors the bevel portion.

[0030] In the alternative embodiment shown in Fig. 3, optionally, the average length WI of the plurality of corrugations of the container corrugated plate is 372mm, and average

lengths of the corrugations in the range of 330-450mm can optimize the structure of the

container corrugated plate. Furthermore, in the present embodiment, the height difference H

between the crest portion and the trough portion neighboring it (that is, the corrugation depth)

is 36mm, and in an embodiment not shown, the height difference between the crest portion

and the trough portion neighboring it may be 20mm-60mm, whereby different corrugations

can be obtained. Furthermore, optionally, the height differences between different crest

portions and the respective trough portion that neighbors the respective crest portion are not

totally equal. In other words, the container corrugated plate may have at least two height

differences, that is, at least two corrugations of different heights.

[0031] Optionally, the crest portion, the bevel portion and the trough portion are formed by integrally pressing.

[0032] By comparing Fig. 1 to Fig. 4, description is made by taking the container

corrugated plate (side-wall plate) of a 20' container as the example, wherein the container

corrugated plate has a corrugation depth H of 36mm and a plate thickness t of 2mm, and the length of the bevel portions is constant.

[0033] As shown in Fig. 1, a conventional container corrugated plate has 20 corrugations, and in each of the corrugations the length of the crest portion is equal to the

length of the trough portions in the corrugation.

[0034] Particularly, the first corrugation of the container corrugated plate in Fig. 1 comprises four parts: a bevel portion 2 (of a length of 68mm), a crest portion 1 (of a length of 71.5mm), a bevel portion 2 (of a length of 68mm) and a trough portion 3 (of a length of

71.5mm) that are sequentially connected. Therefore, the length of the corrugation is 279mm.

Furthermore, the total length of the crest portions 1 (20*71.5mm) and the total length of the trough portions (20*71.5mm) of the entire container corrugated plate are also equal. In other

words, the average corrugation span of the corrugated plate is 279mm, and the value of its

moment of inertia is II(see the following table).

[0035] As shown in Fig. 2, a container corrugated plate wherein merely the length of the trough portions has been changed has 15 corrugations, wherein the length of the trough

portion in each of the corrugations is larger than the length of the trough portions of the

container corrugated plate shown in Fig. 1 by 93mm. For example, the length of the trough portion in each of the corrugations is 164.5mm.

[0036] Particularly, the first corrugation of the container corrugated plate in Fig. 2 comprises four parts: a bevel portion 12 (of a length of 68mm), a crest portion 11 (of a length of 71.5mm), a bevel portion 12 (of a length of 68mm) and a second trough portion 13 (of a

length of 164.5mm) that are sequentially connected. The length of the corrugation is 372mm, and the value of its moment of inertia is12 (see the following table).

[0037] As shown in Fig. 3, the container corrugated plate according to the first embodiment of the present disclosure has 15 corrugations, wherein the length of the crest portion in each of the corrugations is larger than the length of the crest portion in each of the

corrugations in the prior art by 46.5mm, and the length of the trough portion in each of the

corrugations is larger than the length of the trough portion in each of the corrugations in the prior art by 46.5mm.

[0038] For example, the length of the crest portion in each of the corrugations is 18mm, and the length of the trough portion in each of the corrugations is 18mm.

[0039] Particularly, the first corrugation of the container corrugated plate in Fig. 3 comprises four parts: a bevel portion 22 (of a length of B2), a crest portion 21 (of a length of

A2), a bevel portion 22 (of a length of B2) and a trough portion 23 (of a length of C2) that are

sequentially connected. The length of the corrugation is B2+A2+B2+C2. In a condition

wherein A2 is 71.5mm and B2 is 68mm, the length of the corrugation W2 is 372mm, and the

value of its moment of inertia is13 (see the following table).

[0040] As shown in Fig. 4, the container corrugated plate according to the second embodiment of the present disclosure has 15 corrugations, wherein the total length of the

plurality of crest portions of the container corrugated plate is equal to the total length of the

trough portions of the container corrugated plate, the lengths of the crest portions in different

ones of the corrugations are not totally equal, and the lengths of the trough portions in

different ones of the corrugations are not totally equal. In other words, in different

corrugations, the length of a crest portion may be greater than, equal to or less than the length

of the trough portions in the corrugation.

[0041] Particularly, the length wl of the first corrugation of the container corrugated plate in Fig. 4 is 68+al+68+bl, the length of the second corrugation is 68+a2+68+b2, and the

length wl5 of the fifteenth corrugation is 68+a15+68+bl5. In the condition wherein N=15,

al+a2+....+a15=bO+bl+b2+....+bl5, wherein bO is the length of the shorter trough portion

located at one end of the first complete corrugation. Preferably, the average length of the

corrugations of the container corrugated plate is 372mm, and the value of its moment of

inertia is 14 (see the following table).

Ratio (total Moment length of of Serial number of Average Total length of crest Total length of crest inertia number corrugations length portions mm trough portions mm portions/total ofcross mmlength of section trough 4 portions) 20 279 1430 (71.5*20) 1430 (71.5*20) 1 2243310 1 (11) 15 372 1072.5 (71.5*15) 2467.5 (164.5*15) 0.4346 2300410 2

15 372 1770(118*15) 1770 (118*15) 1 2489730 3 4 15 372 1770 (al+...+a15) 1770 (bl+...+bl6) 1 2489730

(14)

[0042] Regarding the container corrugated plate shown in Fig. 2, the increasing of its I value is limited. Furthermore, as compared with the container corrugated plate shown in Fig.

1, by merely increasing the length of the trough portions (or the crest portions), the length of

a single trough or crest is too large, whereby the flatness cannot be effectively controlled.

[0043] The result of the comparison of the moments of inertia of the 4 corrugation structures is Il < 12 < 13 = 14. In conclusion, it can be obtained that when the average

corrugation span of a corrugation is increased, its moment of inertia is increased, and the

corresponding flexural rigidity (flexural rigidity refers to the product of the moment of inertia

of the cross section and the elasticity modulus) is increased, and on the basis of that, when the

total length of the crest portions and the total length of the trough portions are equal, it has

the largest moment of inertia and the best flexural rigidity.

[0044] The corrugation structure may also be a side-wall structure, a local

side-wall-plate structure (may be a single four-wave plate), an end-wall plate, a local

end-wall-plate structure, a door-plate structure, a top-plate structure, and so on, of the entire

body.

[0045] Furthermore, according to another aspect of the present disclosure, there is provided a container, comprising the above-described container corrugated plate.

[0046] Unless defined otherwise, the technical and scientific terms used herein have the same meanings as those generally understood by a person in the art of the present disclosure.

The terms used herein are merely for the purpose of describing the particular implementation,

and are not intended to limit the present disclosure. The terms such as "component" used

herein may indicate a single part, and may also indicate the combination of a plurality of

parts. The terms such as "install" and "provide" used herein may indicate one component

directly attaching to another component, and may also indicate one component attaching to

another component via an intermediate component. An element that is described in one

embodiment herein may be applied to another embodiment solely or in a combination with

another element, unless the element is not applicable in the another embodiment or indicated

otherwise.

[0047] The present disclosure has been described by using the above embodiments.

However, it should be understood that the above embodiments are merely for the purpose of illustration and description, and are not intended to limit the present disclosure within the

scope of the described embodiments. A person skilled in the art can understand that more

variations and modifications can be made according to the teaching of the present disclosure, and all of the variations and modifications fall within the scope claimed by the present

disclosure.

[0048] The reference in this specification to any prior publication (or information derived from it), or to any matter which is known, is not, and should not be taken as an

acknowledgment or admission or any form of suggestion that that prior publication (or information derived from it) or known matter forms part of the common general knowledge

in the field of endeavour to which this specification relates.

[0049] Throughout this specification and claims which follow, unless the context requires otherwise, the word "comprise", and variations such as "comprises" or "comprising",

will be understood to imply the inclusion of a stated integer or group of integers or steps but

not the exclusion of any other integer or group of integers.

Claims

WHAT IS CLAIMED IS:

1. A container corrugated plate for a 20' container, wherein the container corrugated plate

comprises a plurality of trough portions and a plurality of crest portions, and the crest portions

and the trough portions are provided sequentially in a length direction of the container and

neighboring crest portion and trough portion are connected by bevel portions,

wherein the container corrugated plate comprises a plurality of connected corrugations,

each of the corrugations comprises one of the bevel portions, one of the crest portions, one of

the bevel portions and one of the trough portions, all of which are sequentially connected, an

average length of the plurality of corrugations is 300-600mm, and one of a total length of the

trough portions and a total length of the crest portions is 0.8-1.2 times the other of the total

length of the trough portions and the total length of the crest portions, and a height difference

between the crest portion and the trough portion that neighbors the crest portion is 20mm

60mm, and the container corrugated plate has 15 of the corrugations.

2. The container corrugated plate according to claim 1, wherein the average length of the

plurality of corrugations of the container corrugated plate is 330-450mm.

3. The container corrugated plate according to claim 1 or claim 2, wherein the crest portion

and the trough portion are parallel.

4. The container corrugated plate according to any one of claims 1 to 3, wherein the bevel

portion forms an obtuse angle with a crest portion that neighbors the bevel portion, and the

bevel portion forms an obtuse angle with a trough portion that neighbors the bevel portion.

5. The container corrugated plate according to any one of claims 1 to 4, wherein height

differences between different crest portions and the respective trough portion that neighbors

the respective crest portion are not totally equal.

6. The container corrugated plate according to any one of claims I to 5, wherein the crest

portion, the bevel portion and the trough portion are formed integrally by pressing.

7. The container corrugated plate according to any one of claims 1 to 6, wherein in each

of the corrugations a length of the crest portion and a length of the trough portion are equal.

8. The container corrugated plate according to any one of claims 1 to 7, wherein the total

length of the plurality of crest portions of the container corrugated plate is equal to the total length of the trough portions of the container corrugated plate, lengths of the crest portions in different ones of the corrugations are not totally equal, and lengths of the trough portions in different ones of the corrugations are not totally equal.

9. The container corrugated plate according to any one of claims I to 8, wherein an average length of the corrugations is 372mm.

10. A 20' container, wherein the container comprises the container corrugated plate

according to any one of claims I to 9.

1 3 2

H

1/4 t

Fig. 1

11 13 12

2/4 Fig. 2

21 23 22 A2 C2 B2 B2 H

3/4 t

W1

Fig. 3