A packaging device for a sink

Abstract

The utility model belongs to the packaging technical field, concretely relates to a kind of packaging device for sink, including the fixed card seat and corner guard piece made of corrugated paperboard.Fixed card seat is hollow cuboid shell, and the opening for the groove body of sink is passed is opened in its top, bottom surface center, for setting and fixing sink panel, limit transport displacement.Corner guard piece is right-angled, and inlay inside end angle of fixed part, and the sandwich cavity formed by its upper / lower resistance top and middle support part is buckled panel end angle, provides protection and fixed.Both synergies, panel is stabilized in the cavity of fixed part.Compared with prior art, the packaging device of the utility model can effectively absorb transport impact;Full paper base material can degrade, and environmental protection advantage is remarkable;Folding forming process reduces cost and greatly reduces storage volume;Special opening supports sink longitudinal stable layering transport, improves space utilization;At the same time, the unpacking debris problem of traditional foam packaging is avoided, and user experience is improved.

Description

Technical Field

[0001] This utility model belongs to the field of packaging technology, specifically a packaging device for water tanks. Background Technology

[0002] Kitchen sinks (such as stainless steel and ceramic sinks) generally consist of a sink body and a connecting panel around the upper perimeter of the sink body. They are typically large, heavy, have sharp edges, and are easily scratched, with some having irregular curved surfaces or rounded corners. If transported directly in a cardboard box, they are easily damaged by vibration or drops, resulting in edge damage, surface scratches, or even breakage. Therefore, traditional packaging commonly uses foam packaging (such as EPS foam or EPE pearl cotton) as cushioning material. Its elasticity absorbs impact energy, and through customized molding designs, it can tightly wrap the sink, preventing shaking and protecting the surface. However, foam materials have significant drawbacks: Firstly, in terms of recycling, foam packaging is bulky and lightweight, resulting in high transportation costs for recycling. Furthermore, it requires complex processing after recycling before reuse, leading to extremely low recycling value and an actual recycling rate of less than 10%. Secondly, in terms of environmental protection, its non-degradability easily leads to "white pollution," with landfill disposal occupying large amounts of land resources and incineration potentially producing harmful gases such as dioxins. In terms of cost, the large volume of foam increases warehousing and logistics costs, and as a petroleum-based product, its raw material prices are significantly affected by fluctuations in international oil prices. In terms of user experience, the unpacking process is cumbersome and generates a large amount of debris, affecting the cleanliness of the usage environment and the user experience. Existing alternatives such as molded pulp or honeycomb cardboard, while environmentally friendly, lack sufficient cushioning performance and structural stability, making them unsuitable for heavy-duty sinks. The high cost of some biodegradable materials also hinders their widespread adoption.

[0003] In summary, there is an urgent need to develop a new packaging solution that combines high protection, environmental friendliness, and low cost. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems of existing water tank packaging components that are difficult to balance environmental protection, stability and cost, and to provide a packaging device for water tanks.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A packaging device for a water tank includes corner protectors and a fixing bracket; the fixing bracket is a hollow shell with a first opening in the center of its top surface and a second opening in the center of its bottom surface; the corner protectors can be fitted into the inner corners of the fixing bracket, and the corner protectors include an upper abutment, a lower abutment, and a support part; the upper abutment is located at the top of the corner protector and is in the shape of a flat right-angled plate, and the lower abutment is located at the bottom of the corner protector and is in the shape of a flat right-angled plate, and is symmetrical to the upper abutment; the support part includes an outer support part and an inner support part; the outer support part connects the upper abutment and the lower abutment, and the inner support part is located inside the outer support part and leaves a gap between it and the upper abutment and the lower abutment to form a sandwich cavity.

[0006] This invention provides a packaging device for water tanks. The fixing bracket is a hollow shell that fits over the water tank panel for protection and fixation, limiting its displacement relative to the side wall of the packaging box during transportation. Openings on its top and bottom surfaces allow the water tank body to pass through. The right-angle corner protectors achieve a dual function through a unique sandwich cavity design: firstly, they fit over the corners of the water tank panel through the sandwich cavity, protecting and fixing the panel, and their symmetrical arrangement on both sides makes assembly more convenient and efficient; secondly, they fix the water tank panel within the cavity of the fixing bracket. Compared with existing technologies, the fixing bracket and corner protectors of this invention have a simple structure and can be formed by cutting and folding cardboard, thereby reducing costs and improving environmental friendliness. During batch transportation and storage, the specially designed opening structure allows multiple water tanks to be stably stacked longitudinally, significantly improving space utilization. When transporting individual packages, the downward-facing installation method of the water tank opening, combined with the clamping design of the packaging device, ensures transportation safety. Furthermore, the all-paper-based structure avoids the debris problem during unpacking of traditional foam packaging, significantly improving the user experience. This solution excels in terms of protection, environmental friendliness, and economy, and is particularly suitable for the packaging needs of heavy-duty water tanks.

[0007] Furthermore, the corner protector is formed by folding a first cardboard, and the fixing bracket is formed by folding a second cardboard, both of which are corrugated cardboard. Compared with the prior art, this utility model, through the synergistic cooperation of the corrugated cardboard fixing bracket and the corner protector, combined with the elastic properties of corrugated cardboard, can effectively absorb the impact energy during transportation, preventing damage to the water tank from collisions and scratches during disassembly, assembly, and transportation. Simultaneously, the device uses all-paper-based biodegradable materials, fully complying with domestic and international environmental regulations, with a recycling rate of over 90%, offering significant environmental advantages over traditional foam solutions. Furthermore, the optimized folding and forming process not only reduces material costs but also decreases storage volume.

[0008] Furthermore, the inner corners of the upper and lower top abutments are rounded. In this design, the rounded transition disperses the concentrated folding stress, preventing the corrugated cardboard from cracking and extending the service life of the packaging.

[0009] Furthermore, both the first and second cardboard sheets are E-flute cardboard. The use of E-flute cardboard in this solution combines functionality and economy: firstly, its ultra-thin flute profile adapts to complex creases, ensuring folding precision; secondly, it provides triple impact protection—surface layer resistance to crushing, flute vibration absorption, and secondary cushioning through the interlayer cavity; its lower basis weight significantly reduces costs while maintaining a high recyclability rate, enhancing its environmental advantages.

[0010] Furthermore, the support portion includes a first support portion and a second support portion; the first support portion includes a first inner support portion and a first outer support portion, and the second support portion includes a second inner support portion and a second outer support portion. The first inner support portion is cuboid in shape, and the second inner support portion is cube in shape. The first inner support portion and the second support portion abut against each other to form an "L"-shaped inner support portion, and the first outer support portion and the second outer support portion are connected to form an "L"-shaped outer support portion.

[0011] Furthermore, the first cardboard includes a first folding area, a second folding area, a third folding area, and a fourth folding area arranged from left to right and connected in the middle. Creases are pre-pressed on the first, second, third, and fourth folding areas. The first inner support is folded through the first folding area, and the second inner support is folded through the fourth folding area. The second and third folding areas each have a central connecting surface, an upper connecting surface on the upper side, and a lower connecting surface on the lower side. Dividing lines are provided between the upper connecting surfaces of the second and third folding areas, and between the lower connecting surfaces of the second and third folding areas, and are used for cutting and separation via these dividing lines. The upper abutment is formed by stacking two upper connecting surfaces, and the lower abutment is formed by stacking two lower connecting surfaces. The outer support is formed by the central connecting surface, and the upper and lower ends of the central connecting surface protrude beyond the first and second inner support areas, thus forming a sandwich cavity between the outer support, the inner support, and the upper and lower abutments.

[0012] Furthermore, the fixing bracket includes a base, a side support, and an upper support. The base is rectangular, and the second opening is located on the base. The side support is longitudinally connected to the four sides of the base. The upper support protrudes radially inward from the upper side of the side support and forms the first opening. The second cardboard includes a base area, a longitudinal connecting area, and a transverse connecting area. The base area constitutes the base. The longitudinal connecting area and the transverse connecting area are respectively connected to the four sides of the base area. The longitudinal connecting area has a first fixing member forming surface and a second fixing member forming surface. The transverse connecting area has a third fixing member forming surface and a fourth fixing member forming surface. A base area intersection fold is provided between the base area and the longitudinal and transverse connecting areas. A side area fold is provided between the first and second fixing member forming surfaces. The side support is folded towards the base along the base area intersection fold through the first and third fixing member forming surfaces. The upper support is folded towards one side of the base along the side area fold through the second and fourth fixing member forming surfaces.

[0013] Furthermore, a latch is provided between the two sides of the base area and the longitudinal connecting area. The latch and the fold line of the base area are collinear. The opposite sides of the fourth fixing member are provided with snap-fit ​​protrusions, which are adapted to the latch. In this solution, the fixing bracket achieves multiple advantages through corrugated paper integrated cutting and snap-locking design: the base area and the connecting area unfold without excess material and are folded in four directions to achieve zero material waste; the longitudinal / transverse connecting area is folded and interlocked to form a gapless composite structure, improving the space compression rate; the collinear locking mechanism of the latch and the snap-fit ​​protrusion, combined with the E-flute layering and compaction, achieves a static load-bearing capacity of 80kg; and when superimposed with the corner protector, it constructs a full-area impact-resistant system.

[0014] Furthermore, the upper support portion of the fixed bracket has a snap-fit ​​structure with respect to the base portion.

[0015] Furthermore, the fastening protrusion is provided with rounded corners, so that the fastening protrusion and the body of the fourth fixing member forming surface are connected by an arc.

[0016] Furthermore, the support portion includes a first support portion and a second support portion; the first cardboard includes a first folding area, a second folding area, a third folding area, and a fourth folding area arranged from left to right and connected sequentially in the middle, the first folding area has a first set of creases, the second folding area has a second set of creases, the third folding area has a third set of creases, and the fourth folding area has a fourth set of creases; the first support portion includes a first inner support portion and a first outer support portion, the first inner support portion is folded from the first folding area along the first set of creases, the first outer support portion covers the rear side of the first inner support portion, and the first support portion is connected to the upper and lower tops through the first outer support portion; the second support portion... It includes a second inner support and a second outer support. The second inner support is formed by folding along the fourth set of creases in the fourth folding area. The second outer support covers the rear side of the second inner support. The second support is connected to the upper and lower abutments through the second outer support. The middle of the second and third folding areas is provided with a middle connecting surface, the upper side is provided with an upper connecting surface, and the lower side is provided with a lower connecting surface. There are dividing lines between the upper connecting surfaces of the second and third folding areas and between the lower connecting surfaces of the second and third folding areas, and they are separated by cutting through the dividing lines. The upper abutment is formed by stacking two upper connecting surfaces, and the lower abutment is formed by stacking two lower connecting surfaces. In this solution, the corner protectors achieve the following through the integrated design of corrugated cardboard and the creases of the four-fold area: zero-waste molding (precise cutting of the dividing lines allows for the reuse of overlapping connecting surfaces), 50kg static load-bearing capacity (the first inner support / second inner support and the double-layer top form a three-dimensional skeleton), and extreme space compression—while reducing material usage and the risk of breakage, the compact structure meets the rigid transportation protection requirements of the heavy-duty water tank. Attached Figure Description

[0017] Figure 1 This is an exploded view of the packaging device. Figure 2 Schematic diagram of the fixed card holder structure Figure 1 ; Figure 3 Schematic diagram of the fixed card holder structure Figure 2 ; Figure 4 This is a schematic diagram showing the assembly of the corner protectors and the sink. Figure 5 Assembly diagram of the fixed bracket and water tank Figure 1 ; Figure 6 Assembly diagram of the fixed bracket and water tank Figure 2 ; Figure 7 Assembly diagram of the fixed bracket and water tank Figure 3 ; Figure 8 This is a schematic diagram of the initial state of the first cardboard. Figure 9 A diagram illustrating the folding of the first cardboard. Figure 1 ; Figure 10 A diagram illustrating the folding of the first cardboard. Figure 2 ; Figure 11 A diagram illustrating the folding of the first cardboard. Figure 3 ; Figure 12 A diagram illustrating the folding of the first cardboard. Figure 4 ; Figure 13 A diagram illustrating the folding of the first cardboard. Figure 5 ; Figure 14 A diagram illustrating the folding of the first cardboard. Figure 6 ; Figure 15 This is a structural diagram of the corner protector; Figure 16 This is a schematic diagram of the initial state of the second cardboard. Figure 17 A diagram illustrating the folding of the first cardboard. Figure 1 ; Figure 18 A diagram illustrating the folding of the first cardboard. Figure 2 ; Figure 19 A diagram illustrating the folding of the first cardboard. Figure 3 ; Figure 20 Schematic diagram of the fixed card holder structure Figure 3 .

[0018] Label Explanation: Corner protector (first cardboard) 1: Top abutment 3, Bottom abutment 4, Support part 5, First support part 51, First inner support part 511, First outer support part 512, Second support part 52, Second inner support part 521, Second outer support part 522, Interlayer cavity 6, Fixing bracket (first cardboard) 2: Base 7, Second opening 71, Side support part 8, Upper support part 9, First opening 91, First folding area 101, First cuboid connecting surface, First cuboid folding surface a1, Second cuboid folding surface a2, Third cuboid folding surface a3, Fourth cuboid folding surface a4, Cuboid overlapping surface a5, First cuboid mating surface a6, Second cuboid mating surface a7, Second folding area 102, Middle connecting surface c2, Upper connecting surface c1, Lower connecting surface c3, Third Folding area 103, first cube connecting surface 1031, first cube folding surface b1, second cube folding surface b2, third cube folding surface b3, fourth cube folding surface b4, cube overlapping surface b5, first cube mating surface b6, second cube mating surface b7, fourth folding area 104, first set of creases 111, second set of creases 112, third set of creases 113, fourth set of creases 114, first intersection crease 121, second intersection crease 122, third intersection crease 123, base area 13, longitudinal connecting area 14, first fastener forming surface e1, second fastener forming surface e2, transverse connecting area 15, third fastener forming surface e3, fourth fastener forming surface e4, bayonet 16, fastening protrusion 17, water tank body 10, floor mat 20. Detailed Implementation

[0019] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0020] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by "left", "right", "up", "down", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] See Figure 1-20As shown, this utility model discloses a packaging device for a water tank, including a corner protector 1 and a fixing seat 2; the fixing seat 2 is a hollow shell with a first opening 91 at the center of its top surface and a second opening 71 at the center of its bottom surface; the corner protector 1 can be fitted into the inner corner of the fixing seat 2, and the corner protector 1 includes an upper abutment 3, a lower abutment 4, and a support part 5. The upper abutment 3 is located at the top of the corner protector 1 and is in the shape of a planar right-angled plate, and the lower abutment 4 is located at the bottom of the corner protector 1 and is in the shape of a planar right-angled plate. The support part 5 is symmetrical to the upper top 3. It includes a first outer support part 512, a second outer support part 522, a first inner support part 511, and a second inner support part 521. The first outer support part 512 and the second outer support part 522 connect the upper top 3 and the lower top 4. The first inner support part 511 and the second inner support part 521 are disposed inside the first outer support part 512 and the second outer support part 522 and have a gap between them and the upper top 3 and the lower top 4 to form a sandwich cavity 6.

[0022] The aforementioned corner protector 1 is formed by folding a first cardboard, and the fixing bracket 2 is formed by folding a second cardboard, both of which are corrugated cardboard. Compared with the prior art, this utility model, through the coordinated cooperation of the corrugated cardboard fixing bracket 2 and the corner protector 1, combined with the elastic properties of corrugated cardboard, can effectively absorb the impact energy during transportation, preventing damage to the tank body 10 from collisions and scratches during disassembly, assembly, and transportation. Simultaneously, the device uses all-paper-based biodegradable materials, fully complying with domestic and international environmental regulations, with a recycling rate of over 90%, offering significant environmental advantages over traditional foam solutions. Furthermore, the optimized folding process not only reduces material costs but also decreases storage volume.

[0023] The inner corners of the top 3 and bottom 4 are rounded. In this design, the rounded transition disperses the concentrated folding stress, preventing the corrugated cardboard from cracking and extending the service life of the packaging.

[0024] The first and second cardboard sheets mentioned above are E-flute cardboard. The E-flute cardboard used in this solution combines functionality and economy: First, its ultra-thin flute shape is suitable for complex creases (such as the three-dimensional right-angle prism structure of the support part 5), ensuring folding accuracy; at the same time, it provides triple impact protection—surface layer anti-stamping, flute vibration absorption, and interlayer cavity 6 secondary cushioning; lower basis weight (compared to B / C flute) significantly reduces costs, while maintaining a high recycling rate, enhancing its environmental advantages.

[0025] The aforementioned support portion 5 is formed by combining a first support portion 51 and a second support portion 52. The first support portion 51 includes a first inner support portion 511 and a first outer support portion 512, and the second support portion 52 includes a second inner support portion 521 and a second outer support portion 522. The first inner support portion 511 is cuboid in shape, and the second inner support portion 521 is cube-shaped. The first inner support portion 511 and the second inner support portion 521 abut against each other to form an "L"-shaped inner support portion. The first outer support portion 512 and the second outer support portion 522 are connected to form an "L"-shaped outer support portion. In practical applications, the first inner support part 511 is a cuboid in shape, and the second inner support part 521 is a cube in shape. However, one of its faces (such as the first cuboid mating face a6 or the first cube mating face b6) can be tilted inward relative to its main body (folded 130 degrees to tilt inward 40 degrees). The height of the two sides can be slightly smaller than its mating face (the second cuboid mating face a5 or the second cube mating face b5) to enhance the inner support strength of the support part.

[0026] The aforementioned first cardboard includes a first folding area 101, a second folding area 102, a third folding area 103, and a fourth folding area 104 arranged from left to right and connected in the middle. Creases are pre-pressed onto the first folding area 101, the second folding area 102, the third folding area 103, and the fourth folding area 104. The first inner support part 511 is folded through the first folding area 101, and the second inner support part 521 is folded through the fourth folding area 104. The second folding area 102 and the third folding area 103 each have a middle connecting surface c2 in the middle, an upper connecting surface c1 on the upper side, and a lower connecting surface c3 on the lower side. The upper part of the second folding area 102 and the third folding area 103... Dividing lines are provided between the connecting surfaces c1, and between the lower connecting surfaces c3 of the second folding area 102 and the third folding area 103, and the surfaces are separated by cutting along the dividing lines; the upper abutment top 3 is formed by stacking two upper connecting surfaces c1, and the lower abutment top 4 is formed by stacking two lower connecting surfaces c3. The first outer support part 512 and the second outer support part 522 are formed by the middle connecting surface c2, and the upper and lower ends of the middle connecting surface c2 protrude from the first inner support part 511 and the second inner support part 521, so that the first outer support part 512, the second outer support part 522, the first inner support part 511, the second inner support part 521 and the upper abutment top 3 and the lower abutment top 4 form a sandwich cavity 6.

[0027] The aforementioned fixing bracket 2 includes a base 7, a side support 8, and an upper support 9. The base 7 is rectangular, and the second opening 71 is provided on the base 7. The side support 8 is longitudinally connected to the four sides of the base 7. The upper support 9 protrudes radially inward from the upper side of the side support 8 and forms the first opening 91. The second cardboard includes a base area 13, a longitudinal connecting area 14, and a transverse connecting area 15. The base area 13 constitutes the base 7. The longitudinal connecting area 14 and the transverse connecting area 15 are respectively connected to the four sides of the base area 13. The longitudinal connecting area 14 is provided with a first fixing member forming surface e1 and a second fixing member forming surface e2. The transverse connecting area 15 is provided with a third fastener forming surface e3 and a fourth fastener forming surface e4. The base area 13 is provided with a first intersection crease 121 and a second intersection crease 122 between the longitudinal connecting area 14 and the transverse connecting area 15. The first fastener forming surface e1 and the second fastener forming surface e2 are provided with a third intersection crease 123. The side support part 8 is folded towards the base part 7 through the first fastener forming surface e1 and the third fastener forming surface e3 along the first intersection crease 121. The upper support part 9 is folded towards the base part 7 through the second fastener forming surface e2 and the fourth fastener forming surface e4 along the third intersection crease 123.

[0028] A latch 16 is provided between the base area 13 and the two sides of the longitudinal connecting area 14. The latch 16 is collinear with the first intersection crease 121. The opposite sides of the fourth fixing surface e4 are provided with snap-fit ​​protrusions 17, which are adapted to the latch 16. In this solution, the fixing bracket 2 achieves multiple advantages through corrugated paper integrated cutting and snap-locking design: the base area 13 and the connecting area unfold without excess material and are folded in four directions to achieve zero material waste; the longitudinal connecting area 14 / transverse connecting area 15 are folded and interlocked to form a gapless composite structure, improving the space compression rate; the collinear locking mechanism of the latch 16 and the snap-fit ​​protrusion 17, combined with the E-flute layer stacking and compaction, achieves a static load-bearing capacity of 80kg; and when superimposed with the corner protector 1, it forms a full-area impact-resistant system.

[0029] In a preferred embodiment, the first cardboard includes a first folding area 101, a second folding area 102, a third folding area 103, and a fourth folding area 104 arranged from left to right and connected in the middle. The first folding area 101 has a first set of creases 111, the second folding area 102 has a second set of creases 112, the third folding area 103 has a third set of creases 113, and the fourth folding area 104 has a fourth set of creases 114. The first support portion 51 includes a first inner support portion 511 and a first outer support portion 512. The first inner support portion 511 is folded from the first folding area 101 along the first set of creases 111. The first outer support portion 512 covers the rear side of the first inner support portion 511. The first support portion 51 is connected to the upper top 3 and the lower top 4 through the first outer support portion 512. The second support portion 52 includes... The second inner support part 521 and the second outer support part 522 are formed by folding the fourth folding area 104 along the fourth set of creases 114. The second outer support part 522 covers the rear side of the second inner support part 521. The second support part 522 is connected to the upper abutment top 3 and the lower abutment top 4 through the second outer support part 522. The middle part of the second folding area 102 and the third folding area 103 are provided with a middle connecting surface c2, an upper connecting surface c1 on the upper side, and a lower connecting surface c3 on the lower side. There are dividing lines between the upper connecting surfaces c1 of the second folding area 102 and the third folding area 103 and between the lower connecting surfaces c3 of the second folding area 102 and the third folding area 103, and they are separated by cutting through the dividing lines. The upper abutment top 3 is formed by stacking two upper connecting surfaces c1, and the lower abutment top 4 is formed by stacking two lower connecting surfaces c3. In this solution, the corner protector 1 achieves the following simultaneously through the integrated design of corrugated cardboard and the creases of the four-fold area: zero-waste molding (precise cutting of the dividing lines allows for the reuse of the connecting surfaces), 50kg static load-bearing capacity (the first inner support 511 / second inner support 521 and the double-layer top 3 / 4 form a three-dimensional skeleton), and extreme space compression—while reducing material usage and the risk of breakage, the compact structure meets the transportation protection rigidity requirements of the tank body 10 of the heavy-duty water tank.

[0030] Furthermore, a first intersection crease 121 is provided between the first folding area 101 and the second folding area 102, a second intersection crease 122 is provided between the second folding area 102 and the third folding area 103, and a third intersection crease 123 is provided between the third folding area 103 and the fourth folding area 104. The first support part 51 is formed by rotating the first inner support part 511 along the first intersection crease 121 toward the second folding area 102, and the second support part 52 is formed by rotating the second inner support part 521 along the third intersection crease 123 toward the third folding area 103. The support part 5 is formed by folding the first support part 51 and the second support part 52 together along the second intersection crease 122. The first outer support part 512 is the left half of the middle connecting surface c2 of the second folding area 102 and the middle connecting surface c2 of the third folding area 103, and the second outer support part 522 is the right half of the middle connecting surface c2 of the third folding area 103.

[0031] Furthermore, the first folding area 101 includes a first cuboid connecting surface 1031, a first cuboid mating surface a6, and a second cuboid mating surface a7. The first cuboid mating surface a6 and the second cuboid mating surface a7 are connected to opposite sides of the middle part of the first cuboid connecting surface 1031. Four first group creases 111 are longitudinally pressed on the first cuboid connecting surface 1031, which sequentially divides the first cuboid connecting surface 1031 into a first cuboid folding surface a1, a second cuboid folding surface a2, a third cuboid folding surface a3, a fourth cuboid folding surface a4, and a cuboid overlapping surface a5. The first to fourth cuboid folded surfaces a1-a4 form the four axial facades of the first inner support part 511 through folding. The overlapping surface a5 of the cuboid intersects with the folded surface a1 of the first cuboid; The first cuboid mating surface a6 and the second cuboid mating surface a7, after being folded, form the two radial end faces of the first inner support part 511. The third folding area 103 includes a first cube connecting surface 1031, a first cube mating surface b6, and a second cube mating surface b7. The first cube mating surface b6 and the second cube mating surface b7 are connected to opposite sides of the middle part of the first cube connecting surface 1031. Four third set of creases 113 are longitudinally pressed on the first cube connecting surface 1031, which sequentially divides the first cube connecting surface 1031 into a first cube folding surface b1, a second cube folding surface b2, a third cube folding surface b3, a fourth cube folding surface b4, and a cube overlapping surface b5. After being folded, the first to fourth cube folded surfaces b1-b4 form the four axial facades of the second inner support part 521; The overlapping surface b5 of the cube intersects with the folded surface b1 of the first cube; The first cube mating surface b6 and the second cube mating surface b7, after being folded, form the two radial end faces of the second inner support part 521.

[0032] The upper and lower sides of the aforementioned central connecting surface c2 both protrude longitudinally from the third cuboid folded surface a3 and the third cube folded surface b.

[0033] The manufacturing process of the packaging device is further explained below with reference to the accompanying drawings: See Figure 8-15 As shown, the initial state of the corner protector 1 (first cardboard) folding process is: flat corrugated cardboard (including pre-press creases). First folding stage: Rotate the first cuboid's mating surface a6 towards the third cuboid's folding surface a3 by 130°, and simultaneously rotate the first cube's mating surface b6 towards the third cube's folding surface b3 by 130° to form the first folded state.

[0034] Second folding stage: Left side operation: Fold the first to fourth cuboid folding faces a1, a2, a3, and a4 along the creases formed by the cuboid, and overlap the first cuboid folding face a1 on the outside of the cuboid overlapping face a5 to form a second folded cuboid with an opening on the right side; Right side operation: Fold the first to fourth cube folding faces b1, b2, b3, and b4 along the creases formed by the cube, and overlap the first cube folding face b1 on the outside of the cube overlapping face b5 to form a second folded cube with an opening on the left side, entering the second folding state.

[0035] Third folding stage: Fold the second folded cuboid towards the second cuboid mating surface a7 at 90° to form the first inner support part 511; fold the second folded cube towards the second cube mating surface b7 at 90° to form the second inner support part 521, and enter the third folding state.

[0036] Fourth folding stage: The first inner support part 511 is folded at 90° along the first intersection crease 121 toward the second folding area 102 to form the first support part 51, and the second inner support part 521 is folded at 90° along the third intersection crease 123 toward the third folding area 103 to form the second support part 52, thus entering the fourth folding state.

[0037] Fifth folding stage: Fold the first support part 51 and the second folding area 102 together towards the third folding area 103 at 90° along the second intersection fold 122, so that the first support part 51 and the second support part 52 form an "L" shaped combination structure, and enter the fifth folding state.

[0038] Final shaping: The upper connecting surface c1 is folded downwards at 90° to form the upper top 3; the lower connecting surface c3 is folded upwards at 90° to form the lower top 4, thus completing the three-dimensional structure of the corner protector 1.

[0039] See Figure 16-20 As shown, the folding process of the fixed card holder 2 (second cardboard) Initial state: flat corrugated cardboard (including pre-pressed creases and 16-slot structure).

[0040] First folding stage: Fold the first fastener forming surface e1 and the third fastener forming surface e3 along the intersection fold line of the base area at 90° to form the first folding state.

[0041] Second folding stage: Fold the fourth fastener forming surface e4 along the side fold line towards the side closer to the base area 13 by 90 degrees, and enter the second folding state.

[0042] Third folding stage: Fold the second fastener forming surface e2 along the side fold line towards the side closer to the base area 13 by 90° to enter the third folding state.

[0043] Fourth folding stage: Fold the third fastener forming surface e3 down 90° along the intersection crease of the base area to form the complete side support part 8 structure, and enter the fourth folding state.

[0044] Final assembly: Align the snap-fit ​​protrusion 17 with the bayonet 16 and press it in to complete the three-dimensional structure of the fixed bracket 2.

[0045] III. Overall Assembly Process Preparation Stage: Fold the fixing bracket 2 to the third fold position (unclosed latch 16), completing the full folding state of the corner protector 1. Sink positioning: Place the sink with the opening facing down on the base area 13 of the mounting bracket 2, ensuring that the edge of the sink panel is aligned with the edge of the base area 13.

[0046] Corner protector installation: Insert the four corner protectors 1 into the four inner corners of the fixing bracket 2 to ensure that the cavity 6 of the corner protector 1 completely covers the corner of the sink panel.

[0047] Closing the fastener: Complete the assembly of the fastener 2 by following the fourth and fifth folding stages, and check the locking status of the fastening protrusion 17 and the bayonet 16.

[0048] Multi-layer stacking: In practical applications, the water tanks 10 packaged by the packaging device can be placed side by side on the floor mat 20, and multiple packaged water tanks 10 can be stacked vertically through the open structure.

[0049] This utility model provides a packaging device for a water tank. The fixing bracket 2 adopts a hollow cuboid shell structure and is used to fit onto the panel of the water tank, which plays a protective and fixing role and restricts its displacement relative to the side wall of the packaging box during transportation. The openings on its top and bottom surfaces allow the water tank body to pass through. The right-angled corner protector 1 achieves a dual function through a unique sandwich cavity 6 design (formed by the distance between the upper top 3 / lower top 4 and the support part 5): on the one hand, it fits onto the end corner of the water tank panel through the sandwich cavity 6, which plays a protective and fixing role on the panel, and the symmetrical arrangement on the upper and lower sides makes the assembly more convenient and efficient; on the other hand, it fixes the water tank panel in the cavity of the fixing bracket 2. Compared with existing technologies, this utility model, through the coordinated operation of the corrugated cardboard fixing bracket 2 and the corner protector 1, combined with the elastic properties of corrugated cardboard, can effectively absorb the impact energy during transportation, preventing damage to the water tank from collisions and scratches during disassembly, assembly, and transportation. Simultaneously, the device uses all-paper-based biodegradable materials, fully complying with domestic and international environmental regulations, with a recycling rate exceeding 90%, offering significant environmental advantages over traditional foam solutions. Furthermore, the optimized folding and forming process not only reduces material costs but also decreases storage volume. During bulk transportation and storage, the specially designed opening structure allows multiple water tanks to be stably stacked longitudinally, significantly improving space utilization. When transporting individually packaged water tanks, the downward-facing installation method, combined with the clamping design of the packaging device, ensures transportation safety. In addition, the all-paper-based structure avoids the debris problem during unpacking of traditional foam packaging, significantly improving the user experience. This solution excels in protection, environmental friendliness, and economy, making it particularly suitable for the packaging needs of heavy-duty water tanks.

[0050] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A packaging device for a water tank, characterized in that, Includes corner protectors (1) and fixing brackets (2); The fixed bracket (2) is a hollow shell with a first opening (91) in the center of its top surface and a second opening (71) in the center of its bottom surface. The corner protector (1) can be fitted into the inner corner of the fixing bracket (2), and the corner protector includes: The top abutment (3) is located at the top of the corner protector and is in the shape of a flat right-angled plate. The lower abutment top (4) is located at the bottom of the corner protector, and is in the shape of a flat right-angled plate, and is symmetrical to the upper abutment top (3) above and below. The support part (5) includes an outer support part and an inner support part. The outer support part connects the upper abutment (3) and the lower abutment (4). The inner support part is located inside the outer support part and has a gap between it and the upper abutment (3) and the lower abutment (4) to form a sandwich cavity (6).

2. The packaging apparatus according to claim 1, characterized in that, The corner protector (1) is formed by folding a first cardboard, and the fixing bracket (2) is formed by folding a second cardboard, both of which are corrugated cardboard.

3. The packaging apparatus according to claim 2, characterized in that, The inner corners of the upper top (3) and lower top (4) are designed with rounded arcs.

4. The packaging apparatus according to claim 2, characterized in that, The first and second cardboard sheets are E-flute cardboard sheets.

5. The packaging apparatus according to claim 2, characterized in that, The support portion includes a first support portion (51) and a second support portion (52); The first support part (51) includes a first inner support part (511) and a first outer support part (512). The second support part (52) includes a second inner support part (521) and a second outer support part (522). The first inner support part (511) is rectangular, and the second inner support part (521) is cubic. The first inner support part (511) and the second inner support part (521) abut against each other to form an "L"-shaped inner support part. The first outer support part (512) and the second outer support part (522) are connected to form an "L"-shaped outer support part.

6. The packaging apparatus according to claim 5, characterized in that, The first cardboard includes a first folding area (101), a second folding area (102), a third folding area (103), and a fourth folding area (104) arranged from left to right and connected in the middle. Creases are pre-pressed on the first folding area (101), the second folding area (102), the third folding area (103), and the fourth folding area (104). The first inner support part (511) is folded through the first folding area (101), and the second inner support part is folded through the fourth folding area (104). The second folding area (102) and the third folding area (103) are provided with a middle connecting surface (c2) in the middle, an upper connecting surface (c1) on the upper side, and a lower connecting surface (c3) on the lower side. Dividing lines are provided between the upper connecting surfaces (c1) of the second folding area (102) and the third folding area (103) and between the lower connecting surfaces (c3) of the second folding area (102) and the third folding area (103), and are cut and separated by the dividing lines. The upper abutment (3) is formed by stacking two upper connecting surfaces (c1) on top of each other, and the lower abutment (4) is formed by stacking two lower connecting surfaces (c3). The outer support part is formed by the middle connecting surface (c2), and the upper and lower ends of the middle connecting surface (c2) protrude from the first inner support part and the second inner support part, so that an interlayer cavity is formed between the outer support part, the inner support part and the upper abutment and the lower abutment.

7. The packaging apparatus according to claim 2, characterized in that: The fixed bracket (2) includes a base (7), a side support (8) and an upper support (9). The base (7) is rectangular. The second opening (71) is provided on the base (7). The side support (8) is longitudinally connected to the four sides of the base (7). The upper support (9) protrudes radially inward from the upper side of the side support (8) and forms the first opening (91). The second cardboard includes a base area (13), a longitudinal connecting area (14), and a transverse connecting area (15). The base area (13) constitutes the base (7). The longitudinal connecting area (14) and the transverse connecting area (15) are respectively connected to the four sides of the base area (13). The longitudinal connecting area (14) is provided with a first fixing member forming surface (e1) and a second fixing member forming surface (e2). The transverse connecting area (15) is provided with a third fixing member forming surface (e3) and a fourth fixing member forming surface (e4). The side support (8) is formed by folding along the base area intersection fold between the longitudinal connection area (14) and the transverse connection area (15), and by folding along the side area fold between the first fastener forming surface (e1) and the second fastener forming surface (e2). The side support (8) is formed by folding along the base area intersection fold between the first fastener forming surface (e1) and the third fastener forming surface (e3) towards the base (7). The upper support (9) is formed by folding along the side area fold between the second fastener forming surface (e2) and the fourth fastener forming surface (e4) towards the base (7).

8. The packaging apparatus according to claim 7, characterized in that: A latch (16) is provided between the base area (13) and the two sides of the longitudinal connection area (14). The latch (16) and the fold line of the base area are collinear. The four fastener forming surface (e4) is provided with a fastening protrusion (17) on the opposite sides. The fastening protrusion (17) is adapted to the latch (16).

9. The packaging apparatus according to claim 1, characterized in that, The upper support portion of the fixed bracket (2) has a snap-fit ​​structure with the base portion (7).

10. The packaging apparatus according to claim 2, characterized in that, The support portion includes a first support portion (51) and a second support portion (52); The first cardboard includes a first folding area (101), a second folding area (102), a third folding area (103), and a fourth folding area (104) arranged from left to right and connected in the middle. The first folding area (101) has a first set of creases (111), the second folding area (102) has a second set of creases (112), the third folding area (103) has a third set of creases (113), and the fourth folding area (104) has a fourth set of creases (114). The first support part (51) includes a first inner support part (511) and a first outer support part (512). The first inner support part (511) is formed by folding the first folding area (101) along the first set of creases (111). The first outer support part (512) covers the rear side of the first inner support part (511). The first support part (51) is connected to the upper top (3) and the lower top (4) through the first outer support part (512). The second support part (52) includes a second inner support part (521) and a second outer support part (522). The second inner support part (521) is folded into shape by the fourth folding area (104) along the fourth set of creases (114). The second outer support part (522) covers the rear side of the second inner support part (521). The second support part (52) is connected to the upper top (3) and the lower top (4) through the second outer support part (522). The second folding area (102) and the third folding area (103) are provided with a middle connecting surface (c2) in the middle, an upper connecting surface (c1) on the upper side, and a lower connecting surface (c3) on the lower side. Dividing lines are provided between the upper connecting surfaces (c1) of the second folding area (102) and the third folding area (103) and between the lower connecting surfaces (c3) of the second folding area (102) and the third folding area (103), and are cut and separated by the dividing lines. The upper abutment top (3) is formed by stacking two upper connecting surfaces (c1) on top of each other, and the lower abutment top (4) is formed by stacking two lower connecting surfaces (c3).

Images