KR102602930B1 - Prefabricated plastic pallet - Google Patents

Abstract

The present invention discloses a prefabricated plastic pallet manufactured by assembling plastic extrusion molded parts and injection molded parts. The prefabricated plastic pallet of the present invention consists of a plurality of support beams, at least two plates, and first and second reinforcement plates. The support beams have an "I"-shaped cross-section, have an upper flange, a lower flange, and a web connecting the upper flange and the lower flange, and have a plurality of through holes formed in the web, and are spaced apart from each other along the width direction. It is placed with . The plates are fixed to the upper and lower flanges, respectively. The first reinforcement plate is disposed on one side of the web to reinforce the web, and a plurality of snap fits are formed on the side opposite to one side of the web to pass through some of the through holes, and the through holes A plurality of coupling holes are formed on one side of the web and on the other side to align with some of the through holes. The second reinforcing plate is disposed on the other side of the web to face the first reinforcing plate, and passes through the remaining through holes and is elastically coupled to each of the coupling holes of the first reinforcing plate. A plurality of snap fits are formed on the side facing one side, and a plurality of coupling holes are formed on the side facing the other side of the web so that each of the snap fits of the first reinforcement plate is elastically coupled. According to the present invention, each of the support beam and plate is extruded using one or two molds and then cut into unit lengths, allowing pallets of a large number of specifications to be produced in small quantities at low cost. In addition, the rigidity of the support beam is structurally reinforced by the first and second reinforcement plates, preventing damage to the pallet due to overload or external impact.

Description

Prefabricated plastic pallet {PREFABRICATED PLASTIC PALLET}

The present invention relates to a pallet, and more specifically, to a prefabricated plastic pallet manufactured by assembling plastic extrusion molded parts and injection molded parts.

Pallets are used to load, unload, store, and transport cargo in a certain quantity. Pallets are made of various materials such as wood, plastic, metal, and paper. Additionally, pallets are standardized to increase logistics efficiency.

Wooden pallets are easy to manufacture in a variety of sizes, but they are easily damaged and prone to rotting in damp places. In addition, wooden pallets destroy the environment due to logging, require quarantine to remove pests present in the wood, and have the disadvantage of being difficult to recycle. Metal pallets are sturdy and are widely used for unloading heavy objects, but they are easily corroded by moisture, which limits their use in various environments.

Plastic pallets are light and do not rot, so they can be used for a long time. However, since they are manufactured by plastic injection molding, a mold is required. However, since plastic injection molding molds are expensive, they increase the manufacturing cost of the pallet. In addition, it is difficult to manufacture plastic pallets of various sizes due to the time and cost required to manufacture the mold.

Recently, with the diversification of products, the demand for plastic pallets other than standardized specifications is steadily increasing. Additionally, there is a market demand for plastic pallets that are easy to assemble and disassemble to reduce logistics costs.

Republic of Korea Patent Publication No. 10-2109526 discloses a prefabricated plastic pallet that is easy to assemble and disassemble. The plastic pallet disclosed in this patent consists of a plate on which cargo is loaded, a beam frame that supports the loaded cargo, and a joining member to join the plate and beam frame. It also includes a locking panel to prevent the coupled plate and beam frame from being separated, and an unlocking pin to facilitate disassembly. The beam frame has an “I”-shaped cross-section, and a plurality of coupling member insertion holes are formed along the longitudinal direction on the upper and lower surfaces.

The prefabricated pallet in the above patent document has a problem of increasing the overall manufacturing cost due to an increase in mold cost due to the large number of parts such as beam frame, plate, coupling member, locking panel, and unlocking pin. Components such as mating members, locking panels and unlocking pins require a minimum operating length to secure and release the beam frame and plate. Therefore, although standardized products can be produced, there are many limitations in producing and assembling pallets of small size or various sizes required in industrial sites.

In addition, the plate coupled to the lower and upper surfaces of the beam frame has both ends exposed, so when it receives an external impact, there is a problem that the beam frame and the plate easily spread apart. In addition, the beam frame is thin and long, so when the forks of a forklift are inserted into the pallet to transport the pallet, there is a problem that the beam frame or plate is easily damaged when the forks collide with the beam frame and give impact.

The purpose of the present invention is to provide a new prefabricated plastic pallet that can solve the above problems.

According to one aspect of the present invention, a prefabricated plastic pallet is provided. The prefabricated plastic pallet according to the present invention has an “I”-shaped cross-section, has an upper flange, a lower flange, and a web connecting the upper flange and the lower flange, and has a plurality of through holes formed in the web, A plurality of support beams arranged at intervals from each other along the width direction; At least two plates fixed to each of the upper flange and the lower flange; It is disposed on one side of the web to reinforce the web, and a plurality of snap fits are formed on the side facing one side of the web to pass through some of the plurality of through holes, and some of the plurality of through holes. A first reinforcing plate having a plurality of coupling holes formed on a side facing one side of the web to align with the through hole of; It is disposed on the other side of the web to face the first reinforcing plate, and passes through the remaining through holes among the plurality of through holes to be elastically coupled to each of the plurality of coupling holes of the first reinforcing plate. A second reinforcing plate having a plurality of snap fits formed on the opposing side, and a plurality of coupling holes formed on the side facing the other side of the web so that each of the plurality of snap fits of the first reinforcing plate is elastically coupled. Includes.

In the prefabricated plastic pallet according to the present invention, each of the two support beams disposed on both edges of the plurality of support beams extends from each of the upper flange and the lower flange so as to block each of both ends of at least two or more plates. It is further provided with an upper cover plate portion and a lower cover plate portion. In addition, one of the first and second reinforcement plates further includes a cover plate portion extending from one edge so as to cover the ends of each of the plurality of support beams. Therefore, it is possible to prevent the ends of the plates and the ends of the support beams from being damaged by impact.

Each of the first and second reinforcement plates of the prefabricated plastic pallet according to the present invention is sandwiched between the upper flange and the lower flange to support the lower surface of the upper flange and the upper surface of the lower flange. Therefore, the rigidity of the support beam is structurally reinforced by the first and second reinforcement plates, preventing damage to the pallet due to overload or external impact.

The prefabricated plastic pallet according to the present invention can be manufactured by extruding each of the support beam and plate using one or two molds. Therefore, the minimum number of molds can be used compared to the number of parts, which has the effect of reducing production costs by reducing mold costs and improving productivity. In addition, each of the support beams and plates can be extruded and then cut into unit lengths to easily manufacture pallets of various specifications. Therefore, it is effective in producing small quantities of a wide variety of pallets of the large size required in industrial sites at low cost. In addition, the rigidity of the support beam is structurally reinforced by the first and second reinforcement plates to prevent damage to the pallet due to overload or external impact, thereby improving the durability and reliability of the pallet.

Figure 1 is a perspective view showing a prefabricated plastic pallet according to the present invention.
Figure 2 is a cross-sectional view taken along line II-II of Figure 1.
Figure 3 is a front view showing the plastic pallet according to the present invention in a separated state.
Figure 4 is a perspective view showing a support beam disposed at one edge of a plastic pallet according to the present invention.
Figure 5 is a perspective view showing a support beam disposed on the other edge of a plastic pallet according to the present invention.
Figure 6 is a perspective view showing a support beam disposed in the center of a plastic pallet according to the present invention.
Figure 7 is a perspective view showing a plate of a plastic pallet according to the present invention.
Figure 8 is a perspective view showing the first and second reinforcement plates of a plastic pallet according to the present invention.
Figure 9 is a perspective view showing another embodiment of a prefabricated plastic pallet according to the present invention.
Figure 10 is a perspective view showing the first and second reinforcement plates of a plastic pallet of another embodiment according to the present invention.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In explaining the present invention, the size or shape of components shown in the drawings may be exaggerated or simplified for clarity and convenience of explanation. Additionally, terms specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or operator. These terms should be interpreted as meanings and concepts consistent with the technical idea of the present invention based on the content throughout this specification.

Hereinafter, preferred embodiments of the prefabricated plastic pallet according to the present invention will be described in detail based on the attached drawings.

First, referring to FIGS. 1 to 3, the prefabricated plastic pallet 10 according to the present invention has a plurality of support beams (20: 20-1, 20-2, 20-3) arranged along the width direction. ) is provided. Each of the support beams 20 or stringers is made of plastic, for example, polypropylene (PP), by extrusion molding, and is made of a member of a required length that is cut into unit lengths. At least three or more support beams 20 are arranged at intervals from each other. The gap between the support beams 20 is maintained to form a fork hole into which the forks of a forklift can be sufficiently inserted. The support beams 20-1 and 20-2 are a pair of side support beams disposed on both edges in the width direction. The support beam 20-3 is a center support beam disposed in the center between the side support beams.

Referring to FIGS. 4 to 6, each of the support beams 20: 20-1, 20-2, and 20-3 has an “I”-shaped cross section and includes an upper flange (22) and a lower flange. (Lower flange: 24) and a web (Web: 26) vertically connecting the upper flange (22) and the lower flange (24). A plurality of through holes 28 are formed in the web 26. A plurality of fixing holes 30 are formed in each of the upper flange 22 and the lower flange 24. A pair of fork holes 32 into which forks of a forklift can be inserted are formed in the web 26 at intervals from each other. In some embodiments, fork holes 32 may be excluded.

As shown in FIGS. 4 and 5, each of the two support beams 20-1 and 20-2 disposed on both edges of the support beams 20 extends downward from the outer end of the upper flange 22. It further includes an upper cover plate portion 34 extending upward, and a lower cover plate portion 36 extending upward from the outer end of the lower flange 24.

1 to 3 and 7, the prefabricated plastic pallet 10 according to the present invention includes at least two plates 40; 40-1 coupled to each of the upper flange 22 and the lower flange 24. , 40-2) is provided. The plates 40 are made of plastic, for example, polypropylene, by extrusion molding, and are made of length members that are cut into required unit lengths. The plates 40 of the longitudinal members are arranged at intervals from each other along the longitudinal direction perpendicular to the width direction on each of the upper flange 22 and the lower flange 24.

Each of the plates 40 has a first end 42, a second end 44, an upper surface 46, and a lower surface 48. Each of the plates 40 includes a plurality of square pipe portions 50 in which a hollow is formed, and a connection plate portion 52 connecting two adjacent square pipe portions 50 among the square pipe portions 50. Consists of. A plurality of fixing holes 54 are formed in the square pipe portion 50 to be aligned with the fixing holes 30 of the support beam 20.

Among the plates 40, a plurality of plates 40-1 disposed on the upper flange 22 constitute a top deck (60) or upper plate. A plurality of plates 40-2 disposed on the lower flange 24 constitute a lower deck (Bottom deck: 62) or a lower plate. In FIG. 1, each of the upper and lower techs 60 and 62 is shown to be composed of five plates 40, but this is just an example and the number of plates 40 can be increased or decreased as needed. In some embodiments, each of the upper and lower decks 60 and 62 may be composed of a plastic panel or a plastic board instead of the plates 40.

Referring again to FIGS. 1 to 3, the prefabricated plastic pallet 10 according to the present invention includes a plurality of fastening members 70 for coupling the plates 40 to each of the upper flange 22 and the lower flange 24. Equipped with Each of the fastening members 70 is a screw (72) or nail that is coupled to the respective fixing holes 30 of the upper flange 22 and the lower flange 24 through the fixing holes 54 of the plates 40. It can be composed of various types of nails, staples, bolts, etc. Additionally, the fastening member 70 may be composed of a fastener such as a snap fit or clip. The snap fit may be formed integrally with the plates 40.

1 to 3 and 8, the prefabricated plastic pallet 10 according to the present invention includes a first reinforcement plate 80 and a second reinforcement for reinforcing the web 26 of each of the support beams 20. A plate 90 is provided. Each of the first and second reinforcing plates 80 and 90 is a square-shaped plate made of plastic, for example, polypropylene, by injection molding, and is composed of substantially the same parts and is provided on both sides of the web 26. They are arranged so that they correspond to each other on the surface.

The first reinforcement plate 80 is disposed on one side of the web 26. A plurality of snap fits 82 are formed on the surface opposite to one side of the web 26 to pass through some of the through holes 28. A plurality of coupling holes 84 are formed on the surface opposite to one side of the web 26 to align with some of the through holes 28. Each of the snap fits 82 and the coupling holes 84 are formed along the diagonal direction of the first reinforcement plate 80.

The second reinforcement plate 90 is disposed on the other side of the web 26 to face the first reinforcement plate 80. The other side of the web 26 so that a plurality of snap fits 92 pass through the remaining through holes 28 and are elastically coupled to each of the coupling holes 84 of the first reinforcement plate 80. It is formed on the side facing the. A plurality of coupling holes 94 are formed on the surface facing the other surface of the web 26 so that each of the snap fits 82 of the first reinforcement plate 80 is elastically coupled.

Each of the first and second reinforcement plates 80 and 90 is sandwiched between the upper flange 22 and the lower flange 24 to support the lower surface of the upper flange 22 and the upper surface of the lower flange 24. In this way, the upper and lower flanges 22 and 24 are supported on the upper and lower surfaces of the first and second reinforcement plates 80 and 90, respectively, thereby reinforcing the rigidity of the support beams 20, and the upper and lower flanges 22 and 24 respectively Deformation of the lower flanges 22 and 24 can be prevented.

From now on, the assembly process of the prefabricated plastic pallet according to the present invention having the above configuration will be described.

1 to 3, the snap fits 82 of the first reinforcement plate 80 are inserted into some of the through holes 28 to attach the first reinforcement plate 80 to one side of the web 26. Place it on the side. On the other side of the web 26, the snap fits 92 of the second reinforcement plate 90 are connected to the coupling holes 84 of the first reinforcement plate 80 through the remaining through holes 28. At the same time as coupling the snap fit 82 of the first reinforcement plate 80 to the coupling holes 94 of the second reinforcement plate 90.

In this way, the rigidity of the support beams 20 is structurally reinforced by the first and second reinforcement plates 80 and 90 added to both sides of the web 26, thereby improving the reliability of the pallet 10. Additionally, the first and second reinforcement plates 80 and 90 of the same configuration can be easily assembled by fitting the snap fits 82 and 92, thereby improving productivity. The first and second reinforcement plates 80 and 90 can be easily separated by pulling out each of the snap fits 82 and 92 from each of the coupling holes 84 and 94.

1 to 3 and 8, when assembly of the support beams 20 and the first and second reinforcement plates 80 and 90 is completed, the support beams 20 are spaced at equal intervals along the width direction. After placement, the plates 40 are placed on the upper flange 22 at equal intervals along the longitudinal direction. At this time, the upper cover plate parts 34 of the support beams 20 arranged at both edges are arranged to cover the first and second ends 42 and 44 of the plates 40. The screws 72 are fixed to the fixing holes 30 of the upper flange 22 through the fixing holes 54 of the square pipe parts 50. When the screw 72 is composed of a self-tapping screw or a self-drilling screw, the fixing holes 30 and 54 are connected to the upper flange 22 and the square pipe portions 50. Even if they are not pre-formed, the support beams 20 and the plates 40 can be easily coupled by fastening self-tapping screws. Additionally, even when attaching the plates 40 to the upper flange 22 using nails, staples, etc., there is no need to form the fixing holes 30 and 54 in advance. Therefore, the support beams 20 and the plates 40 can be easily assembled.

Subsequently, after coupling the plates 40 to the upper flange 22, the support beams 20 are turned upside down so that the lower flange 24 faces upward. Plates 40 are disposed on the lower flange 24 at equal intervals along the longitudinal direction. At this time, the lower cover plate parts 36 of the support beams 20 arranged at both edges are arranged to cover the first and second ends 42 and 44 of the plates 40. Assembly of the pallet 10 is completed by fixing the screws 72 to the fixing holes 30 of the lower flange 24 through the fixing holes 54 of the square pipe parts 50.

In this way, the prefabricated plastic pallet 10 according to the present invention assembles the support beams 20 and the first and second reinforcement plates 80 and 90, and the upper flange 22 and the lower flange of the support beams 20. (24) Productivity can be improved by a simple process of assembling each plate 40. In addition, the support beams 20 and plates 40 can be manufactured by extrusion molding and cut into required unit lengths, so the pallet 10 can be easily manufactured by diversifying its specifications.

9 and 10 show another embodiment of a prefabricated plastic pallet according to the present invention. 9 and 10, the same configuration of the prefabricated plastic pallet 10A of another embodiment and the prefabricated plastic pallet 10 described above are assigned the same reference numerals and detailed descriptions are omitted. The difference between the prefabricated plastic pallet 10A of another embodiment and the prefabricated plastic pallet 10 described above lies in the first reinforcement plate 80A for reinforcing the rigidity of the support beams 20.

The first reinforcement plate 80A of the prefabricated plastic pallet 10A of another embodiment is provided with a cover plate portion 86 extending from one edge so as to cover the ends of each of the support beams 20. The cover plate portion 86 is formed on one edge of the first reinforcement plate 80A so as to be perpendicular to the first reinforcement plate 80A. In some embodiments, the cover plate portion 86 may be formed on one edge of the second reinforcement plate 90.

In the prefabricated plastic pallet 10A of another embodiment, the cover plate portion 86 blocks and protects the ends of each of the support beams 20 from being exposed to the outside. Accordingly, the ends of the support beams 20 are prevented from being damaged by external shock. In addition, the cover plate portion 86 improves reliability by maintaining the appearance of the pallet 10A by preventing the gap between the support beams 20 and the plate 40.

The embodiments described above merely describe preferred embodiments of the present invention, and the scope of the present invention is not limited to the described embodiments, and is within the scope of the technical idea and claims of the present invention. Various changes, modifications or substitutions may be possible, and such embodiments should be understood as falling within the scope of the present invention.

10, 10A: prefabricated plastic pallet 20: support beam
22: upper flange 24: lower flange
26: Web 28: Through hole
34: upper cover plate part 36: lower cover plate part
40: Plate 70: Fastening member
80, 80A: first reinforcement plate 82, 92: step fit
84, 94: coupling hole 86: cover plate part
90: second reinforcement plate

Claims (9)

The cross section has an "I" shape, and includes an upper flange, a lower flange, and a web connecting the upper flange and the lower flange, and a plurality of through holes are formed in the web, spaced apart from each other along the width direction. A plurality of support beams arranged with;
At least two plates fixed to each of the upper flange and the lower flange;
It is disposed on one side of the web to reinforce the web, and a plurality of snap fits are formed on a side opposite to one side of the web to pass through some of the plurality of through holes, and the plurality of a first reinforcing plate having a plurality of coupling holes formed on a side facing one side of the web to align with some of the through holes of;
The web is disposed on the other side of the web to face the first reinforcement plate, and is elastically coupled to each of the plurality of coupling holes of the first reinforcement plate through the remaining through holes of the plurality of through holes. A plurality of snap fits are formed on the side facing the other side of the web, and a plurality of coupling holes are formed on the side facing the other side of the web so that each of the plurality of snap fits of the first reinforcement plate is elastically coupled. It includes a second reinforcement plate formed,
Each of the plurality of support beams is a prefabricated plastic pallet made of length members manufactured by extrusion molding from plastic and cut into unit lengths. According to paragraph 1,
Each of the two support beams disposed at both edges of the plurality of support beams is an upper cover plate portion and a lower cover extending from each of the upper flange and the lower flange so as to block each end of the at least two plates. A prefabricated plastic pallet further comprising a plate portion. According to paragraph 1,
A prefabricated plastic pallet wherein one of the first and second reinforcement plates further includes a cover plate portion formed on one edge to cover an end of each of the plurality of support beams. According to paragraph 1,
Each of the first and second reinforcement plates is sandwiched between the upper flange and the lower flange to support the lower surface of the upper flange and the upper surface of the lower flange. According to paragraph 1,
A prefabricated plastic pallet comprising a fastening member that penetrates the at least two plates and couples the at least two plates to each of the upper flange and the lower flange. delete According to any one of claims 1 to 5,
The at least two plates are arranged at intervals from each other along a longitudinal direction perpendicular to the width direction on each of the upper flange and the lower flange, and are manufactured by extrusion molding from plastic and cut into unit lengths. A prefabricated plastic pallet made of materials. In clause 7,
The at least two plates are composed of a plurality of hollow square pipe parts and a plurality of connection plate parts connecting two adjacent square pipe parts among the plurality of square pipe parts, each of the plurality of square pipe parts having a plurality of square pipe parts. A prefabricated plastic pallet that is coupled to each of the upper and lower flanges by fastening screws. According to any one of claims 1 to 5,
Each of the first and second reinforcement plates is a prefabricated plastic pallet made of a square-shaped plate made of plastic by injection molding.

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