Note: Descriptions are shown in the official language in which they were submitted.
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STORAGE AND TRANSPORT BOX
SPECIFICATION
The present invention relates to a reinforcement system for storage and/or
transport boxes, particularly
for reinforcing the connection between the wall and the lid of said box.
Furthermore, the invention
relates to a storage and transport box which incorporates said reinforcement
system, particularly in
boxes with thermal insulation of the interior space for the storage and/or
transport of food that require
special storage conditions, for example, storage and/or transport of fish.
BACKGROUND
Currently there are various solutions aimed at boxes for the storage and/or
transport of fresh food,
which require special storage conditions, for example, to avoid losing the
cold chain.
As a general rule, boxes for storing and/or transporting this type of food
have a base body and a lid,
both rigid components made of a material that favors the thermal insulation of
the inside of the box.
For example, the most widely used storage and transport boxes in the industry
are made of expanded
polystyrene (EPS), since this material is inexpensive, it facilitates the
manufacturing process, is light
and has a low coefficient of thermal conductivity which for densities between
12 to 30 gr/1 it ranges
from 0.030 to 0.045 W/(mK), providing good thermal insulation properties at
low weight.
Although storage and/or transport boxes made of EPS are the most used in the
industry, said boxes
have several disadvantages mainly derived from the low mechanical resistance
of the material with
which they are manufactured, mainly against bending stresses which usually
result in the box faces
breaking due to impacts during handling whether on the sides, bottom and/or
lid. In addition,
resistance to compression stresses in EPS boxes is mainly due to the use of
high-density EPS and the
management of wall thickness, an issue that limits the potential for reducing
the weight of current
boxes.
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Therefore, the need arises for a box that maintains the advantages of the
current boxes used by the
industry mainly with regard to thermal insulation and resistance to
compression but improving impact
resistance and reducing the weight of the box.
In the prior art there are various solutions that claim to obtain an optimal
combination of benefits
improving resistance, optimizing weight, providing thermal insulation
according to storage
requirements, lid sealing to avoid liquid leakage and other advantages
associated with the storage and
transport of food with cold chain. For example, GB 2337044 discloses a box for
the storage and
transport of fish comprising a base body and a lid arranged to provide a
closure that reduces leakage
of liquid from inside the box, for example from melting ice. To this end, the
base body of the box
comprises an edge with a projection and the lid comprises an edge with a
groove arranged to receive
said projection establishing a pressure connection between body and lid.
Furthermore, the box in GB
2337044 comprises elements intended to favor the stacking of boxes for
transport. In this context,
although document GB 2337044 defines optimal sealing and stacking qualities
for an EPS box, it does
not propose improvements to prevent breakage by impact of the box face (s) nor
does it seek to reduce
weight of the same.
On the other hand, document WO 2011/062502 discloses an EPS box for food
transport wherein one
of the objectives is to achieve a good combination of low weight and lower
exterior volume while
maintaining the same interior volume. To this end, the box in WO 2011/062502
replaces the EPS lid
with a thin film which would maintain sealing properties and, considering the
transport of stacked
boxes, it would not significantly affect the thermal insulation properties
taking advantage of the
insulation provided by the upper case in contact with the thin film of the
lower case. In this context,
although document WO 2011/062502 seeks to reduce the weight of the EPS box the
approach used in
said document considerably reduces the thermal insulation performance,
particularly when the boxes
are not in stacked format.
Finally, document FR 2286068 defines an EPS box of which base has
perpendicular sides with internal
reinforcing projections on which the lid rests in its closed position.
Although it is expected that the
internal reinforcements in the walls of the box disclosed in FR 2286068
improve the mechanical
resistance of the box, said document does not disclose an integral solution
that seeks to increase
resistance and at the same time to reduce the weight of the box. Furthermore,
in FR 2286068 it is
established that the cover rests on the internal reinforcement projections
without considering a special
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mechanism aimed at communicating the forces exerted on the cover, such as
compression towards
said reinforcement projections.
Considering the above, it is necessary to have a reinforcement system and a
box that solve the
problems presented by the prior art, particularly providing greater impact
resistance and reducing the
weight of the box.
DESCRIPTION OF THE INVENTION
An objective of the present invention is to solve the problems existing in
current boxes for storage
and/or transport of goods, preferably food, said boxes being preferably made
of a material that favors
thermal insulation, such as EPS.
Another objective of the present invention is to provide a reinforcement
system to be implemented in
a box, particularly between at least one wall and the lid increasing the
resistance to bending and/or
damage by impacts on the faces of the box.
Another objective of the present invention is to provide a box that
incorporates the reinforcement
system, preferably integrated in the same material of the box which favors the
reduction of the weight
.. of the box compared to current solutions.
Another objective of the invention is to provide a box made of EPS for the
storage and/or transport of
fish, preferably salmon, which favors thermal insulation, control of the
fluids inside the box, resistance
to bending and/or impacts, resistance to compression and weight reduction
compared to current boxes,
integrating the reinforcement system of the present invention.
In order to meet the above objectives, the present invention proposes a wall-
lid reinforcement system
for reinforcing a storage and/or transport box of goods wherein the box
comprises:
a base body formed by side walls and a bottom wall, each one comprising
interior and exterior faces
wherein the interior faces define an interior space with an opening; and
a lid with an inner face, an outer face and a peripheral edge to close the
opening of the base body and
to define a closed configuration of the box.
The wall-lid reinforcement system for the box with the above elements
comprises:
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at least one wall reinforcing body arranged on at least one face of at least
one side wall of the base
body of the box wherein said wall reinforcing body comprises a wall supporting
area arranged towards
the opening of the base body; and
at least one lid reinforcing body arranged on the inside face of the lid
wherein the lid reinforcing body
comprises a lid support area that faces the wall support area when the box is
closed;
wherein the wall reinforcement body and the lid reinforcement body define at
least one reinforcement
assembly.
The objective of the reinforcement assembly is to provide a resistant element
that not only allows to
obtain an adequate resistance to compression that can be exerted on the box
during use, but also seeks
to avoid the damage that the box receives mainly on its lateral, upper and
lower faces, because of
impacts or its manipulation, a question that usually results in the breaking
of the affected face
considering the low resistance to bending that the material usually used in
this type of boxes has.
According to one embodiment, the wall reinforcing body is arranged on the
inner face of at least one
side wall of the base body and the lid reinforcing body is arranged towards
the inside of the peripheral
edge of the lid. In this way, it is possible to maintain the outer volume of
the box that affects the
stacking and storage conditions of the boxes according to the needs of the
industry, achieving a
balance between resistance and maintenance of the inner volume of the box
which is affected in a way
that is not meaningful to the interests of the industry. Notwithstanding this,
as an alternative the
present invention contemplates that the reinforcement assembly is arranged
towards the exterior of
the peripheral edge of the box.
According to one embodiment, the wall reinforcement body and/or the lid
reinforcement body have a
curved surface wherein preferably the edges of the curved surface of the wall
reinforcement body
and/or the lid reinforcement body are arranged tangentially to the wall and/or
lid, respectively.
Through this configuration a smooth interior finish is achieved which prevents
the undesired waste
accumulation inside the box and facilitates cleaning. Furthermore, the
internal configuration of the
box seeks to avoid damage to the stored goods and to increase the rigidity of
the side faces.
According to another embodiment, the reinforcement system comprises at least
one reinforcement
assembly arranged on each side wall of the box wherein reinforcement
assemblies on opposite side
walls of the box can be arranged facing each other, forming a pair of opposite
reinforcement
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assemblies. According to an alternative embodiment, the reinforcement system
comprises an upper
reinforcement element for each pair of opposite reinforcement assemblies,
wherein said upper
reinforcement element joins said opposite reinforcement assemblies and wherein
said upper
reinforcement element is arranged on the inner face of the lid. This
configuration allows a compressive
integration of the different reinforcing elements that the system has, forming
an arrangement of
reinforcing elements that cooperate to allow the resistance of the box to be
maintained at a lower
weight. Notwithstanding the foregoing, it is relevant to note that the
invention also contemplates the
alternative that each reinforcing element operates independently, in effect,
according to an
embodiment the reinforcing system comprises at least one reinforcing element
arranged on the inner
face of the lid, joining opposite portions of the peripheral edge of the lid
not necessarily being related
to a wall-lid reinforcement assembly.
Within this context, each upper reinforcing element can be configured as an
arched profile beam, with
a wider cross section towards the peripheral edge of the lid. This
configuration seeks to increase the
bending resistance of the lid and to better integrate the reinforcement
elements in the lid with the wall-
lid reinforcement assemblies. In addition, this configuration protects the lid
against impacts and
compression.
According to an alternative embodiment, each lid reinforcing body projects
outward the inner face of
the lid entering the opening of the base body in the closed configuration of
the box. Through this
configuration it is sought that the lid reinforcement body, in addition to
increasing the strength of the
lid-wall joint, facilitates the fitting of the lid into the base body when the
box is configured in its closed
state.
According to a preferred embodiment of the invention, the wall support area
and the lid support area
facing said wall support area, are at least partially in contact. By means of
said contact the
reinforcement components in the lid communicate with the reinforcement
components in the base
body, generating a continuous reinforcement body in a closed configuration.
According to this
embodiment, the strength of the box is substantially improved.
According to another embodiment of the invention the wall reinforcement body
and the lid
reinforcement body are arranged substantially vertically. In this way, the
resistance provided by the
reinforcement body and the material necessary to make it, are optimized. In
this context, it should be
noted that a preferred embodiment of the invention contemplates that the
reinforcement system is
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integrated into the box and it is made of the same material of the box.
Preferably, also the material of
the box is selected from the group consisting of materials that promote
thermal insulation, preferably
the material is expanded polystyrene (EPS).
On the other hand, as stated above, the present invention also relates to a
box for the storage and/or
transport of goods, comprising:
a base body formed by side walls and a bottom wall, each one comprising
interior and exterior faces
wherein the interior faces define an interior space with an opening; and
a lid with an inner face, an outer face and a peripheral edge to close the
opening of the base body and
define a closed configuration of the box.
Said box is configured to additionally comprise a wall-lid reinforcement
system according to the
qualities and characteristics described above.
According to one embodiment of the box, the opening of the base body comprises
a perimeter edge
with a first connection means and the inner face of the lid comprises a
perimeter edge with a second
connection means, said first and second connection means being complementary
to each other.
Preferably, the first connecting means corresponds to a connecting edge
projecting up from the
opening and the second connecting means corresponds to a connecting groove
arranged to receive the
connecting edge.
On the other hand, the inner face of the bottom of the base body of the box
may comprise an
arrangement of grooves particularly arranged for the accumulation of fluids
inside the box either as a
result of the melting of a cooling medium such as ice or from the stored
goods. According to an
embodiment, the grooves allow storage of at least 88 cc of fluid separating it
from the stored goods.
Said grooves also favor thermal damping, improving thermal insulation
performance of the case.
According to another embodiment of the box, the outer face of the bottom of
the base body comprises
a configuration of recesses and stacking grooves wherein said stacking grooves
are configured to
receive stacking projections arranged on the outer face of the lid. In this
regard, the recesses on the
bottom outer face of the base body make it possible to substantially reduce
the weight of the box and,
at the same time, increase the resistance of the bottom of the box against
impacts. Furthermore, the
arrangement of the recesses is designed to avoid substantially affecting the
thermal insulation
properties. On the other hand, the arrangement of stacking grooves on the
outer face of the bottom of
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the box and of stacking projections on the outer face of the lid which
interact cooperatively during
stacking, makes it possible not only to favor the regular stacking of the box
one on top of the other in
the same direction, thus avoiding relative lateral displacement between
stacked boxes, but rather it
favors cross-stacking or substantially orthogonal stacking between boxes,
usually used when
transporting this type of boxes wherein a first level is arranged with boxes
in a first direction and a
second level is arranged with the boxes in a second direction substantially
orthogonal to the first
direction of the boxes on the first level.
According to another embodiment, the base body comprises four side walls, two
major side walls and
two minor side walls wherein the wall-lid reinforcement system comprises at
least one reinforcement
assembly arranged on each minor side wall and at least two reinforcement
assemblies arranged on
each major side wall. Through this configuration, it is sought to have an
adequate number of
reinforcement assemblies on each face of the box wherein the major lateral
faces could have more
than one reinforcement assembly. In this context, we must emphasize that the
reinforcement
assemblies not only seek to favor compression resistance but also seek to
avoid the breakage of the
faces caused by blows or manipulation, due to the low resistance to bending of
the material usually
used.
According to the above embodiment, a reinforcement assembly on the minor side
wall can be arranged
at 1/2 the length of the minor side wall and two reinforcement assemblies on
the major side wall can
be arranged at 1/3 and 2/3 of the length of the major lateral wall. Other
configurations of reinforcement
assemblies are also encompassed by the present application particularly with
regard to the major side
wall, for example comprising three reinforcement assemblies located 1/4, 1/2
and 3/4 the length of
the major lateral wall or 1/3, 1/2 and 2/3 the length of the major lateral
wall.
On the other hand, according to alternative embodiments of the invention, the
base body can comprise
vertical perforations towards the corners of the base body generating a
vertical space in the corners
which seeks to reduce the weight of the box by removing material without
sacrificing resistance and
thermal insulation capacity. These perforations can be substantially
cylindrical, generated for example
by corresponding modifications in the mold during the manufacturing of the
box.
According to one embodiment, the base body comprises at least one corner
recess arranged towards
the upper corners of the base body defining an area for removal of the lid
when it is in a closed
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configuration. The corner recess allows the exposed edge of the lid to be
grasped with ease, in order
to facilitate lid removal when in closed configuration.
According to one embodiment of the invention, the base body comprises at least
one lateral recess
arranged on the outer face of at least one lateral wall defining a surface for
a label. This configuration
allows any labeling to be placed on one or more of the side faces of the box
or even on the lid, in an
area specially designed for the label which has a minimum recess that prevents
damage to the labels
by contact, protecting them with the general wrapping of the box.
Furthermore, the base body comprises at least one lower recess arranged on the
outer face of at least
two side walls towards the bottom of the base body defining a gripping
surface. Preferably, the lower
grip recess is provided on the opposite side walls of the box.
On the other hand, the outer face of the lid comprises clamping zones arranged
towards the peripheral
edge of the lid. Preferably, said clamping zones are in a position aligned
with each lid reinforcing
body. The clampling zone corresponds to an indication on the lid of the box
which is intended for the
implementation of straps, winches or tightening bands that are used to keep
the lids closed, exerting
compression between the lid and the base body. Usually the implementation of
said bands or straps is
carried out in any area of the box damaging the box when said area is not
sufficiently resistant to the
stresses implied by the implementation of the closure bands. Additionally,
considering that the
implementation of the straps is carried out on the production line after
closing the box and when they
already contain the goods to be stored and/or transported, any damage
resulting from the application
of the straps which results in making it impossible the use of the box,
generates a delay in the
production line due to the replacement of the box in question.
In this sense, the tightening zone contemplated by the invention provides a
clear indication to the
operator about the zone where each strap must be applied wherein said zone,
being aligned with the
reinforcing bodies, is configured to resist the tightening force exerted by
the strap and avoids the
damages caused by it on the box, at least those that require its replacement,
making it impossible to
use.
According to a preferred embodiment of the invention, the box is made of a
material selected from
the group of materials that favors thermal insulation preferably the material
is expanded polystyrene
(EPS). Moreover, the density of the material is less than 23.7 gr/1 and
greater than 16.7 gr/l, more
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preferably approximately 18.6 gr/l, considering variations of +- 10% as a
result of the manufacturing
process.
On the other hand, the thickness of the side walls of the base body is between
20 and 40 mm, preferably
between 23 and 37 mm and the thickness of the lid is between 18 and 30 mm,
preferably between 20
and 27 mm. Furthermore, the thickness of the bottom of the base body is
between 20 and 30 mm,
preferably it is 26 mm. Based on this configuration, the weight of the box is
less than 420 grs,
preferably 365 grs. In addition, the compressive strength of the box is at
least 602 kg, equaling or even
improving on current boxes which reach compression loads of around 600 kg, but
substantially
reducing the overall weight of the empty box which usually is over 450 grs.
All this while maintaining
a minimum variation in terms of thermal insulation equating the thermal
performance of current boxes.
Finally, it is relevant to highlight that the box in question serves for
thermal insulation of the interior
space of the base body, preferably for the storage and/or transport of food
that requires maintaining a
cold chain and/or being kept fresh towards the destination, for example, any
type of marine food such
as fish. Indeed, one embodiment of the box is specially designed for storing
salmon.
BRIEF DESCRIPTION OF THE FIGURES
As a part of the present invention, the following representative figures of
the same are presented
teaching preferred embodiments of the invention and therefore they should not
be considered as
limiting the definition of the claimed matter.
Figures 1A and 1B show top and bottom perspective views of the box in its
closed configuration,
respectively.
Figures 2A and 2B show top perspective views of the base body of the box
showing different
embodiments of the interior of the box.
Figure 2C shows a top plan view of the base body of the box identifying cut
line D-D.
Figure 2D shows the cutting section D-D corresponding to the base body of
Figure 2C.
Figures 2E and 2F show side views of the base body of the box from the smaller
side and the larger
side, respectively, identifying cutting lines B-B and C-C.
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Figures 2G and 2H show cutting sections B-B and C-C, respectively,
corresponding to the base body
of Figure 2F.
Figure 21 shows a bottom plan view of the base body of the box.
Figure 3A shows a bottom perspective view of the lid of the box.
Figure 3B shows a top plan view of the lid of the box, identifying the cutting
line E-E.
Figure 3C shows the cutting section E-E corresponding to the lid of Figure 3B.
Figure 3D shows a side view of the lid of the box identifying the cutting line
F-F.
Figure 3E shows the cutting section F-F corresponding to the lid of Figure 3D.
Figure 3F shows a bottom plan view of the lid of the box.
DETAILED DESCRIPTION OF AN EMBODIMENT
Figures lA and 1B show a preferred embodiment of the box 1 in its closed
configuration wherein the
lid 3 is arranged covering the opening of the base body 2, closing the box 1.
Figures 2A to 21 show different views and sections of the base body 2
identifying its characteristic
elements according to the exemplified embodiment.
Figures 3A to 3F show different views and sections of the lid 3 identifying
its characteristic elements
according to the exemplified embodiment.
Figure 2A shows an embodiment of the base body 2 comprising at least one wall
reinforcing body 4
arranged on at least one face of at least one side wall of the base body 2 of
the box 1 wherein said
reinforcing body wall 4 comprises a wall support zone 5 arranged towards the
opening of the base
body 2. Furthermore, in Figure 2A it is shown that the opening of the base
body 2 comprises a
perimeter edge with a first connection means 10 corresponding to a connecting
edge projecting
upward from the opening. Furthermore, in Figure 2A it can be seen that the
inner face of the bottom
of the base body 2 comprises an arrangement of grooves 6 to receive fluids
inside the box 1. On the
other hand, in Figure 2A it can be seen that the base body 2 comprises,
according to one embodiment,
vertical perforations 7 towards the four corners of the base body 2, corner
recesses 8 arranged towards
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the upper corners of the base body 2 and at least one lower recess arranged on
the outer face of the
base body 2 towards the bottom thereof, defining a gripping surface 9.
In Figure 2B an alternative embodiment of the arrangement of grooves 6' can be
seen, according to an
alternative embodiment of the invention.
Figure 2C shows a plan view of the base body, showing the arrangement of
grooves 6 according to
the preferred embodiment. In addition, the arrangement of the vertical
perforations 7 of the first
connection means 10 and the configuration of the wall reinforcing bodies,
especially of the wall
support zones 5 that are arranged in the base body 2, are evident.
In Figure 2D a section of the base body 2 is shown, according to the cut line
D-D in Figure 2C. Figure
2D shows the projected configuration of the first connection means 10, the
gripping surfaces 9 and
the depth of the grooves 6. Moreover, Figure 2D shows the recess 12 that the
outer face of the bottom
of the base body 2 has, as well as the stacking groove 11 arranged towards the
periphery of the outer
face of the bottom of the base body 2, and the depth of the label surface 13
on two of the faces of the
base body 2.
Figures 2E and 2F show side views of the base body 2 identifying the minor
side of the base body in
Figure 2E and the major side of the base body in Figure 2F. In both figures
the first connection means
10 of the base body 2 can be seen as well as the corner recesses 8 that said
body has. Furthermore, in
Figure 2E the label surface 13 can be seen.
Figures 2G and 2H show cross-sectional areas of the base body 2 shown in
Figure 2F, both sections
according to lines B-B and C-C of Figure 2F. By comparing both cutting
sections it can be seen that
both represent the depth of the grooves 6, the recess 12 and the stacking
grooves 11, as well as the
projection of the first connecting means 10 which configures a connecting
edge. Additionally, when
comparing the cutting sections in Figures 2G and 2H it is possible to notice
that at different distances
from the major side of the base body 2, the cross sections vary according to
the elements present at
said distances. For example, in Figure 2B, section B-B crosses the wall
reinforcing bodies 4 which is
identified by the greater thickness of the wall of the base body in said
section B-B. On the other hand,
Figure 2H shows section C-C wherein the cut crosses an area that does not
comprise a wall reinforcing
body identifying a smaller thickness of the wall in said section. On the other
hand, it is also appreciated
that the section C-C comprises additional stacking grooves 11' arranged
towards the center of the
section.
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Figure 21 shows in more detail the different elements or characteristics of
the outer face of the bottom
of the base body 2, showing the spatial arrangement of the recess 12 and of
the stacking grooves 11
and 11' wherein the first corresponds to a groove that runs the entire
perimeter of the base body 2 and
the second corresponds to four grooves, two of them arranged towards each
minor lateral end of the
base body 2. Furthermore, it is shown that the center of the box in its lower
part, also has stacking
grooves 11" arranged in a portion of the outer face of the bottom that does
not include recess 12.
On the other hand, Figure 3A shows a perspective view of the lid 3 of the box
being possible to
appreciate the arrangement of the lid reinforcement bodies 4' and the lid
support areas 5' which are
arranged in addition to the wall reinforcement bodies 4 and wall reinforcement
zones 5 according to
the preferred embodiment. Moreover, Figure 3A shows the arrangement of the
second connection
means 10' of the lid complementing the first connection means 10 of the base
body, the reinforcement
elements 13 arranged on the inside face of the lid 3 and the arrangement of
the clamping zones 14 on
the outer face thereof.
Figure 3B shows a top plan view of the lid 3 showing its outer face. This
Figure shows the spatial
configuration of the clamping zones 14 and of the stacking projections 15 that
the lid 3 has, the latter
complementary to the stacking grooves 11, 11' and 11" that the outer face of
the bottom of the base
body 2 has.
Figure 3C shows section E-E corresponding to the cut of the lines E-E in
Figure 3B. In Figure 3C it
is possible to see the arrangement of the second connection means 10' in the
lid as a peripheral groove
that surrounds the perimeter edge of the lid 3. Furthermore, it is posible to
appreciate the arrangement
of reinforcing elements 13 and the arrangement of the body of the lid
reinforcement 4' as an outward
projection of the inner face of the lid, entering the opening of the base body
2 in the closed
configuration of the box 1.
In Figure 3D a lateral face of the lid 3 can be seen, showing the cut line F-
F. Furthermore, Figure 3D
shows the lid reinforcement bodies 4', the reinforcement elements 13, the
clamping zones 14 and the
stacking projections 15, all of which are elements of the lid 3. In this
Figure it can be seen that the
clamping zones 14 are aligned with the lid reinforcement bodies 4',
reinforcing the clamping zone
where the straps are placed during the packaging of the boxes.
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Figure 3E shows section F-F of Figure 3D, wherein a cut of the lid 3 is
characterized, with which the
beam shape with an arched profile of the reinforcing elements 13 is evidenced,
wherein said
reinforcing element 13 has a wider cross section towards the peripheral edge
of the lid.
Figure 3F shows a bottom plan view of the lid 3, showing its inner face. In
said Figure it is possible
to see the second connection means 10' as a connection groove that surrounds
the entire edge of the
lid 3. Furthermore, it can be seen that the configuration of reinforcing
elements comprises at least one
longitudinal reinforcing element 13' and at least two cross sectional
reinforcing elements 13", all of
them joining opposite lid support zones 5'.
According to the embodiment illustrated in the Figures of the present
invention the wall reinforcement
bodies 4 and the lid reinforcement bodies 4' comprise a curved surface,
resulting in a configuration of
ondulating interior walls inside the base body 2 as seen in Figures 2A to 2C
and on the inner face of
the lid 3 as seen in Figure 3F. Additionally, this configuration provides a
configuration of walls that
have a variable cross section, as shown in Figures 2G and 2H, a configuration
that makes it possible
to reinforce the box and at the same time to reduce the loss of interior
volume.
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