KR20080079498A - Pallet and a manufacturing device thereof and a manufacturing method thereof - Google Patents

Abstract

A pallet using a danpla sheet, a manufacturing apparatus thereof, and a manufacturing method thereof are provided to allow stable combination among the components of the pallet and to support sufficient heavy weight. A pallet comprises: an upper plate(110) and a lower plate(120) made of a danpla sheet with multiple cords; and multiple supporting plates(130) having insertion holes into which a fork of a fork-lift truck is inserted, which are formed by folding and depositing the danpla sheet in multiple stages and assembled to be crossed each other in a lattice shape. A manufacturing apparatus of the pallet comprises: a cutting part to cut the upper and the lower plate, and the supporting plates; a folding part to fold the supporting plate in multiple stages; the first deposition part to perform deposition of folding surfaces of the supporting plates; an incision part to incise the deposited supporting plates as much as the height corresponding each other; an assembling part performing crossing and assembling each of the supporting plates; the second deposition part; and a piercing part.

Description

A pallet and a manufacturing apparatus using the short plastic sheet and a manufacturing method thereof

1 is an exploded perspective view showing the structure of a pallet according to a preferred embodiment of the present invention

Figure 2 is a perspective view of the combination shown to explain the structure of the pallet according to a preferred embodiment of the present invention

Figure 3 is a perspective view showing for explaining the coupling state between each support plate of the pallet according to an embodiment of the present invention

Figure 4 is an enlarged exploded perspective view of the main portion shown to explain the coupling structure between each support plate of the pallet according to an embodiment of the present invention

Figure 5 is a schematic block diagram showing for explaining a pallet manufacturing apparatus according to a preferred embodiment of the present invention

6 to 8 are perspective views schematically showing a process of forming a fusion hole in the support plate during the pallet manufacturing process according to a preferred embodiment of the present invention

9 to 11 are perspective views schematically showing a process of forming a molten slit to join the upper plate and the lower plate to the support plate during the pallet manufacturing process according to a preferred embodiment of the present invention

12 to 14 is a perspective view schematically showing a process of forming the insertion hole in the support plate of the pallet manufacturing process according to a preferred embodiment of the present invention

15 is a schematic flowchart illustrating a pallet manufacturing process according to a preferred embodiment of the present invention.

Explanation of symbols for main parts of the drawings

110. Top plate 120. Bottom plate

130. Support plate 131. Welding hole

132. Melt slits 133. Insertion holes

134. Incision 210. Cutout

220. Folding part 230. First welding part

231. Heated heater 240. Incision

250. Assembly part 260. Second fusion part

261.Fin Heater 270.Through

271.Hot Knife

The present invention relates to a pallet, and more particularly, to a new type of pallet capable of supporting a sufficient weight while allowing a simple manufacturing and stable coupling between the components.

In general, a pallet is a series of components that are transported by a forklift or the like in which various cargoes are placed.

Since the pallet is usually manufactured by combining a plurality of wooden bars or wooden panels, the overall cost is inevitably high, and the weight is also heavy.

In addition, the above-described conventional wooden pallets are inconvenient to separate all the nails from the wooden pallets in order to be recycled when they are discarded due to the damage because the components are bonded to each other by nails or the like.

Of course, the pallet is also made of a synthetic resin, such as plastic as a whole, but also the overall weight is not only heavy, but also consumes a lot of raw materials for the manufacturing, there is a problem that is extremely vulnerable to torsional strength.

In recent years, as described in the Korean Patent Publication No. 10-0396194, the pallet is manufactured by using a synthetic resin corrugated sheet (short plastic sheet) instead of wood, thereby minimizing weight and reducing the price.

The pallet using the above-mentioned short plastic sheet had to be able to maintain its folded state because the structure of the support plate, which is interposed between the upper plate and the lower plate, was formed by folding the short plastic sheet a plurality of times. Provided.

However, since the conventional folding retaining structure is made of a structure in which the two components are coupled to each other, it is difficult to bind to the folded short sheet in a folded state, and thus there is a problem that the manufacturing time may take a long time. In addition, when the pallet is discarded, it is also inconvenient to remove each of the folding retainer for recycling.

In addition, the above-mentioned conventional pallets have to rely on ultrasonic fusion or adhesive bonding process between the upper plate, the lower plate and the support plate, but this bonding method causes problems such as easy separation as the bonding area between each other is small. It became.

In addition, the above-described conventional pallet has been added to the process of cutting a portion of the bottom surface of the support plate for inserting a fork, such as a forklift to form an insertion hole, the above-described cutting is usually made by a cutter (cutter) The problem arises that the time will be long.

In addition, when the fork is inserted and lifted into the insertion hole, the load of the pallet is substantially concentrated at the junction between the lower plate and the portion where the insertion hole is not formed in each portion of the support plate. There was a problem that caused separation.

The present invention has been made to solve the various problems of the prior art described above, one object of the present invention is to make the operation for maintaining the folding of the support plate is formed in a folded state many times as quickly and simply as possible In addition, it is to provide a new type of pallet with a structure that can be made stably and a manufacturing apparatus and a manufacturing method thereof.

In addition, another object of the present invention is to provide a short plastic sheet fusion device that allows the contact between the two separately configured short plastic sheet to proceed stably and quickly.

Pallet according to one embodiment of the present invention for achieving the above object is a top plate and a bottom plate made of a synthetic resin material of a single plastic sheet having a plurality of valleys, so that a plurality of intersecting in a lattice form while interposed between the top plate and the bottom plate It is assembled, the surface comprises a plurality of support plates formed with an insertion hole for inserting a fork, such as a forklift, wherein each support plate is formed by folding the short plastic sheet in multiple stages, so that each folded surface is fused and bonded to each other Characterized in that configured.

Here, the end of each of the portions of the support plate folded is characterized in that the fusion hole is formed to be fused between the folding surface while penetrating in the folding direction.

In addition, a plurality of molten slits are formed on the contact surface between the support plate and the upper plate and the lower plate to be melted while penetrating the corresponding portions, and the molten slits are inclined with respect to the longitudinal direction of the support plate. do.

In addition, the support plate is formed through the insertion hole through which the fork of the forklift is inserted, the insertion hole is formed in a position spaced apart from the lower plate and formed through the high-temperature heat to form a surface folded in multiple stages are fused to each other do.

In addition, the pallet according to another aspect of the present invention for achieving the above object is a top plate and a bottom plate made of a synthetic resin material of a single plastic sheet having a plurality of valleys, a plurality of lattice type while being interposed between the top plate and the bottom plate And a support plate having an insertion hole into which a fork such as a forklift is inserted, and the contact surface between the support plate and the upper plate and the lower plate is fused and bonded to each other so that the contact surface between the support plate and the upper plate and the lower plate is formed on the surface thereof. It is characterized in that a plurality of molten slit is formed so as to penetrate through the site to be bonded to each other.

Here, each of the molten slit is characterized in that it is formed inclined with respect to the longitudinal direction of the support plate.

In addition, the pallet manufacturing apparatus of the present invention for achieving the above object is a cutting portion for cutting the upper plate and the lower plate and the support plate by cutting the short plastic sheet of synthetic resin material having a plurality of bone; A folding unit that receives a support plate in a flat state cut by the cutting unit and folds it in multiple stages; A first welding portion composed of a rod-shaped hot rod heater passing through the folded portions of each of the danfra sheets while being thermally fused to each folded portion of the support plate folded in multiple stages by the folding portion, and being heated by providing power; An incision that cuts cross-assembled portions between the respective support plates to which the folded portions are joined by the first fusion portion by a height corresponding to each other; An assembly unit for cross-assembling each of the support plates; The upper plate and the lower plate are thermally fused to each support plate assembled by the assembling unit, and are bonded to each other. A second fusion portion composed of a fin heater; And, through the insertion hole formed in each of the support plate, characterized in that it comprises a through portion consisting of elliptical-shaped hot knife end is formed by the blade while being heated by the power supply.

Here, the fin heater is formed of a plurality of thin plates, characterized in that the inclined so as not to be the same as or perpendicular to the contact direction of the upper plate and the support plate, or the contact direction of the lower plate and the support plate.

In addition, the pallet manufacturing method of the present invention for achieving the above object is a cutting step of forming a top plate and a lower plate and a support plate by cutting the short plastic sheet of synthetic resin material having a plurality of bone; A folding step of receiving a support plate in a flat state cut through the cutting step and folding it in multiple stages; A first fusion step of joining each other by heat-sealing the folded portions of each support plate folded in multiple stages by the folding step; An incision step of cutting the cross-assembled portions between the respective support plates to which the folded portions are joined by the first fusion portion by a height corresponding to each other; An assembly step of cross-assembling each other by matching the cut portions of the support plates; A second fusion step of bonding the upper and lower plates to each support plate assembled by the assembling step, respectively, and bonding the upper and lower plates to each other; Then, the step of forming a through-hole through which the fork of the forklift is inserted into each of the support plates: characterized in that the progress made sequentially.

In addition, the short plastic sheet fusion apparatus of the present invention for achieving the above another object is a device for fusion of two short plastic sheets of synthetic resin material having a plurality of bone, the device is heat generated by the power supply of the two short plastic sheet It is characterized by consisting of a pin heater penetrating the contact portion of the liver.

Here, the fin heater is formed of a plurality of thin plates, it characterized in that the inclined so as not to be the same or perpendicular to the contact direction between the two short plastic sheet.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a pallet, a pallet manufacturing apparatus and a manufacturing method of the present invention will be described with reference to FIGS.

First, a pallet according to a preferred embodiment of the present invention will be described with reference to FIGS. 1 to 4.

1 to 4, the pallet according to the embodiment of the present invention includes a top plate 110 and a bottom plate 120 and a plurality of support plates 130.

Here, the upper plate 110 and the lower plate 120 is a portion forming the upper and lower surfaces of the pallet.

The upper plate 110 and the lower plate 120 is formed of a flat plate, in particular, a polypropylene copolymer (PP Copolymer) is formed of a danpla sheet (danpla sheet) having a plurality of bones by forming a corrugated structure.

In addition, the upper plate 110 and the lower plate 120 may be formed in the same shape with each other, but the portion of the lower plate 120 that is not bonded to each support plate 130 is formed to be more open. desirable. This is to allow the moisture or foreign matter, which may be accumulated inside the pallet, to be smoothly discharged through the opened portion and to minimize the overall weight.

In addition, the support plate 130 is a series of configurations interposed between the upper plate 110 and the lower plate 120, as shown in Figures 3 and 4 attached to be assembled so as to overlap while overlapping the lattice.

In particular, the support plate 130 is a configuration formed by folding the short plastic sheet. In this case, the support plate may be formed so that both ends are folded only once in any one direction as shown in the embodiment, but if necessary, the support plate may be formed to be folded at least twice. have.

In addition, the folded surfaces of the support plate 130 are configured to be fused and bonded to each other.

In this case, a fusion hole 131 is formed at the end of each of the portions of the support plate 130 in which the folding surface is fused while penetrating in the folding direction. Of course, the above-mentioned fusion hole 131 is a portion which is formed for fusion between each folded surface, the shape and size do not matter. That is, the forming part of the fusion hole 131 is melted in the process of forming the fusion hole 131, and after the fusion hole 131 is formed, the molten portion is fused to each other while being firmly bonded to each other It is to maintain the state.

In addition, the support plate 130 is configured to be bonded to the upper plate 110 and the lower plate 120 by fusion.

That is, the contact surface between the support plate 130, the upper plate 110 and the lower plate 120 is also fused and bonded to each other.

To this end, a plurality of molten slits 132 are formed on the contact surface between the support plate 130, the upper plate 120, and the lower plate 130 to melt while penetrating the corresponding portions.

In particular, the melted slit 132 is formed to be inclined with respect to the longitudinal direction of the support plate 130, the fusion site between the support plate 130 and the upper plate 110 and lower plate 120 can be made as large as possible. It is configured to.

In addition, an insertion hole 133 into which a fork such as a forklift is inserted is formed on the surface of the support plate 130. In this case, the insertion hole 133 is formed so as to penetrate through the high temperature heat to fold the surface folded in multiple stages.

The insertion hole 133 is formed to form a long long hole in both directions, in particular in the embodiment of the present invention suggests that the insertion hole 133 is formed at a position spaced apart from the lower plate 120. This configuration is to enable more stable support by ensuring the bonding area between the support plate 130 and the lower plate 120 to the maximum.

In addition, the position of the insertion hole 133 is preferably formed to be relatively adjacent to the lower plate (120). This is to improve the bearing capacity for the area lifted by the fork of the forklift.

In addition, the support plate 130 is formed with a cutting hole 134 cut in a shape corresponding to each other at positions corresponding to each other for coupling between the support plates 130, respectively.

Next, with reference to the accompanying Figure 5 will be described a pallet manufacturing apparatus according to a preferred embodiment of the present invention.

As shown in FIG. 5, the apparatus for manufacturing a pallet according to an embodiment of the present invention has a large cutting unit 210, a folding unit 220, a first fusion unit 230, an incision unit 240, The assembly part 250, the 2nd fusion | melting part 260, and the penetration part 270 are comprised.

Here, the cut portion 210 is a series of configurations for cutting the upper plate 110 and lower plate 120 and the support plate 130 forming a pallet. That is, the cutting unit 210 is configured to cut the top plate of the synthetic resin material having a plurality of valleys to manufacture the upper plate 110 and lower plate 120 and the support plate 130.

Of course, the cut portion 210 may be divided into a cut portion for cutting the upper plate 110, a cut portion for cutting the lower plate 120 and a cut portion for cutting the support plate 130, respectively.

In addition, the folding unit 220 is a series of components that receive the support plate 130 in a flat state cut by the cutting unit 210 and folded in multiple stages.

At this time, the folding unit 220 is configured so that both ends of the support plate 130 of each of the flat state can be folded to match each other.

Of course, the folding unit 220 may be configured to be able to fold the support plate 130 more than once so that the thickness of the support plate 130 can be thicker according to the size of the pallet.

In addition, the first fusion unit 230 is a series of configurations in which each folded portion of the support plate 130 folded in multiple stages by the folding unit 220 is fused by high temperature heat.

In this case, the first fusion unit 230 includes a rod-shaped hot rod heater 231 that generates heat by providing power, and the hot rod heater 231 is the amount of the support plate 130 in the folded state. The ends are operated to penetrate each of the matching portions. This is the same as the accompanying Figures 6 to 8.

In addition, the cutout 240 is disposed in a post-process of the first fusion unit 230, and is a series of configurations in which cross-assembled portions between the support plates 130 are cut by corresponding heights.

In this case, the cutout 240 may be configured not only by a conventional cutting device but also by a device for cutting a specific portion using high temperature heat.

The assembling unit 250 is a series of components for cross-assembling the respective support plates 130. In this case, the assembly unit 250 may be configured as an automated device, but may also be configured as a process in which the assembly work is performed by a worker by hand.

The second fusion unit 260 is a series of components in which the upper plate 110 and the lower plate 120 are thermally fused to each support plate 130 assembled by the assembling unit 250 to bond each other. .

In this case, the second fusion unit 260 is heat generated by the power supply, the pin passing through the contact portion between the upper surface of the upper plate 110 and the support plate 130 and the lower plate 120 and the bottom surface of the support plate 130. The heater 261 is comprised.

The fin heater 261 is formed of a plurality of thin plates, and are inclined with respect to the contact portion. This is the same as in FIGS. 9 to 11.

In addition, the through part 270 is a series of configurations to penetrate the insertion hole 133 in each of the support plates 130.

At this time, the through part 270 is composed of an elliptical heat knife 271 of the elliptical shape is formed by the blade while the heat generated by the power supply. This is the same as in FIGS. 12 to 14.

In the following, with reference to the block diagram of Figures 6 to 14 and the flowchart of Figure 15 attached to the process for manufacturing a pallet according to an embodiment of the present invention using a pallet manufacturing apparatus according to an embodiment of the present invention described above. Explain.

First, the short plastic sheet is cut at each part in the cutting part 210. (S110)

That is, the upper plate 110 and the lower plate 120 and the support plate 130 are formed by cutting the short sheet.

In addition, the support plate 130 of the upper plate 110 and the lower plate 120 and the support plate 130 cut by the cutting unit 210 is provided as a folding unit 220 and then the plate in the folding unit 220 The support plate 130 in the state is folded in multiple stages. (S120)

In this case, the support plate 130 is formed to have a different thickness depending on the size of the pallet, the thickness is determined by the number of folding. Of course, if necessary, the thickness thereof may be adjusted by inserting the short plastic sheet in a separate flat state into the folded support plate 130.

In addition, the support plate 130 forming the folded state by the above-described series of processes is provided to the first fusion unit 230, and then the folded portion is thermally fused by the first fusion unit 230. This prevents the fold from loosening.

At this time, the process of fusion welding the folded portion of the support plate 130 is to provide heat to the heating rod heater 231 constituting the first fusion unit 230 to generate heat and then the heating rod 231 is the support plate It is performed by forming a fusion hole 131 through the folded portion of 130.

That is, when the heat sealing heater 231 penetrates the support plate 130, the fusion hole 131 is formed due to the heat and the penetration force of the heat sealing heater 231, and at the same time, the forming portion of the fusion hole 131 is formed. After melting, the hot rod heater 231 is taken out from the fusion hole 131, and the melted portions in the fusion hole 131 are fixed to each other, and the folding surfaces constituting the support plate 130 are fused to each other to form a firm bonding state. Will be maintained. The process thereof is the same as that of FIGS. 6 to 8.

At this time, the fusion hole 131 is most preferably formed so that the two ends of the support plate 130 along the folded portion (that is, to form a plurality of fusion sites).

Then, when the fusion to the folded portion of the support plate 130 as described above is completed, the corresponding support plate 130 is provided to the incision 240 to correspond to the cross-assembly site between each support plate 130 Incision to be made to the height. (S140)

Thereafter, the assembly unit 250 is assembled while crossing so that the cut portions of the support plates 130 overlap each other (S150).

When the assembly of the support plates 130 is completed, the assembled support plates 130 are provided to the second fusion unit 260 and then the upper plate 110 and the second fusion unit 260. It is bonded to the lower plate 120. (S160)

That is, the upper plate 110 is bonded to the upper surface of each of the support plates 130 and the lower plate 120 is bonded to the lower surface of each of the support plates 130.

At this time, the bonding process between each of the support plate 130 and the upper plate 110 and the lower plate 120 is the contact portion of the upper surface and the upper plate 110 of each of the support plate 130 and each of the support plate 130 This is performed by forming a plurality of molten slits 132 at the contact portion between the bottom and the lower plate 120.

That is, when the molten slit 132 is formed while penetrating the fin heater 261 at the contact portion between each of the support plates 130, the upper plate 110, and the lower plate 120, the fin heater 261 causes heat. When the inside of the molten slit 132 is melted, and then the fin heater 261 is taken out from the molten slit 132, the molten portion of the molten slit 132 is fixed and each support plate 130 and the top plate ( The contact portion between the 110 and the lower plate 120 is to be fused to each other to maintain a firm bonding state. The process thereof is the same as that of FIGS. 9 to 11.

In particular, each of the thin plates constituting the fin heater 261 is inclined at a predetermined angle with respect to the coupling direction between the respective support plates 130, the upper plate 110 and the lower plate 120, the respective support plates 130 And the junction between the upper plate 110 and the lower plate 120 is made wider, thereby allowing a more stable bonding state can be maintained.

In addition, after the above-described series of processes are completed, the manufacture of the pallet is completed by penetrating (S170) the insertion holes 133 in the respective support plates 130.

In this case, the insertion hole 133 is formed by supplying power to the heat knife 271 constituting the through part 270 to generate heat, and then sequentially passes the heat knife 271 through the support plate 130. The process thereof is the same as that of FIGS. 12 to 14.

In particular, some of the fusion hole 131 of each of the support plate 130 formed in the previous process due to the insertion hole 133 in the process of forming the insertion hole 133 is removed, but each of the support plate ( Since the insertion hole 133 of the 130 is formed is melted and then fixed, the folded state of each of the support plates 130 can be stably maintained.

As a result, the pallet formed by the above-described series of processes is lighter as the whole is formed of the short plastic sheet, and the components are firmly bonded to each other while having a stable supporting force.

On the other hand, the configuration of the second fusion unit 260 during the manufacturing apparatus and manufacturing process of the pallet according to the present invention described above is not only used for the manufacture of the pallet, but also for the manufacture of other products for fusion bonding two short plastic sheet Its application is possible.

That is, the short plastic sheet fusion apparatus may be configured by at least one or more fin heaters passing through a contact portion between the two short plastic sheets while being generated by the power supply. Of course, even at this time, the fin heater is made of a plurality of thin plates, each of the thin plates is most preferably installed to be inclined with respect to the contact portion between each short plastic sheet.

As described above, the pallet using the short plastic sheet according to the present invention, the apparatus for manufacturing the pallet and the manufacturing method thereof can be said to be useful inventions that can be applied to various fields.

As described above, the pallet using the short plastic sheet according to the present invention, the manufacturing apparatus and the manufacturing method of the pallet have various effects as described later.

First, since the pallet according to the present invention is made of a short plastic sheet, the overall weight can be minimized and the price is also low.

Secondly, the pallet according to the present invention and its manufacturing apparatus and manufacturing method is a structure for preventing the folding of the support plate formed by folding the single plastic sheet in multiple stages to form a fusion hole rather than using a separate folding holding zone. By being thermally fused through, it is possible not only to maintain a stable folded state but also to shorten the manufacturing time.

Third, the pallet according to the present invention is formed only of the same material, and because each component is configured to be bonded and fixed by fusion, it has the effect that no separate discharge of other materials is required when recycling.

Fourth, the pallet according to the present invention and the manufacturing apparatus and method for manufacturing the same to allow the process of joining the upper plate and the lower plate constituting the pallet to the support plate by fusion and the above fusion is achieved using a fin heater Since it can be made by penetrating the contact site, it is possible not only to shorten the manufacturing time but also to maintain a stable bonding state.

Claims (11)

A top plate and a bottom plate made of a synthetic resin short plastic sheet having a plurality of valleys, While interposed between the upper plate and the lower plate is assembled to cross a plurality of lattice-shaped, on the surface is configured to include a plurality of support plates formed with an insertion hole for inserting a fork, such as a forklift, Each of the support plates is formed by folding the single plastic sheet in multiple stages, and each folded surface is fused and joined to each other by using a pallet. The method of claim 2, Pallet using a short plastic sheet, characterized in that the end of the folded portion of each of the support plate is formed in the fusion hole is fused between the folding surface while penetrating in the folding direction. The method of claim 1, A plurality of molten slits are formed on the contact surface between the support plate and the upper plate and the lower plate to penetrate the corresponding portions and to be bonded to each other. Each of the molten slit is a pallet using a short plastic sheet, characterized in that formed inclined with respect to the longitudinal direction of the support plate. The method of claim 1, The support plate is formed through the insertion hole is inserted into the fork of the forklift, The insertion hole is formed at a position spaced apart from the lower plate and formed by penetrating with high temperature heat to form a surface folded in multiple stages to be fused to each other pallets. A top plate and a bottom plate made of a synthetic resin short plastic sheet having a plurality of valleys, While interposed between the upper plate and the lower plate is assembled to form a plurality of lattice shape, the surface is configured to include a support plate formed with an insertion hole for inserting a fork, such as a forklift, The contact surface between the support plate and the upper plate and the lower plate is fused to each other so that the contact surface between the support plate and the upper plate and the lower plate is formed through a plurality of molten slit through the corresponding portion is formed so that the molten slit is bonded to each other Palette. The method of claim 5, wherein Each of the molten slit is a pallet using a short plastic sheet, characterized in that formed inclined with respect to the longitudinal direction of the support plate. Cutting section for cutting the upper plate, the lower plate and the support plate by cutting the short plastic sheet of synthetic resin material having a plurality of bone; A folding unit that receives a support plate in a flat state cut by the cutting unit and folds it in multiple stages; A first welding portion composed of a rod-shaped hot rod heater passing through the folded portions of each of the danfra sheets while being thermally fused to each folded portion of the support plate folded in multiple stages by the folding portion, and being heated by providing power; An incision that cuts cross-assembled portions between the respective support plates to which the folded portions are joined by the first fusion portion by a height corresponding to each other; An assembly unit for cross-assembling each of the support plates; The upper plate and the lower plate are thermally fused to each support plate assembled by the assembling unit, and are bonded to each other, and are heated by providing power to penetrate the contact portion between the upper surface of the upper plate and the support plate and the lower plate and the bottom of the support plate. A second fusion portion composed of a fin heater; And, An insertion hole is formed through each of the support plates, and a through part formed of an elliptical shape of a hot knife having a tip formed by a blade while being heated by power supply. The method of claim 7, wherein The fin heater is formed of a plurality of thin plates, the pallet manufacturing using a short plastic sheet characterized in that the inclined so as not to be the same as the contact direction of the upper plate and the support plate or the contact direction of the lower plate and the support plate, or not perpendicular. Device. In the apparatus for fusion of two short plastic sheet of synthetic resin material having a plurality of valleys, The apparatus of claim 1, wherein the apparatus comprises a fin heater passing through a contact portion between the two short plastic sheets while being heated by providing power. The method of claim 9, The fin heater is formed of a plurality of thin plates, the short plastic sheet fusion apparatus characterized in that the inclined so as not to be the same or perpendicular to the contact direction between the two short plastic sheets. Cutting a single plastic sheet made of synthetic resin having a plurality of valleys to form a top plate and a bottom plate and a support plate; A folding step of receiving a support plate in a flat state cut through the cutting step and folding it in multiple stages; A first fusion step of joining each other by heat-sealing the folded portions of each support plate folded in multiple stages by the folding step; An incision step of cutting the cross-assembled portions between the respective support plates to which the folded portions are joined by the first fusion portion by a height corresponding to each other; An assembly step of cross-assembling each other by matching the cut portions of the support plates; A second fusion step of bonding the upper and lower plates to each support plate assembled by the assembling step, respectively, and bonding the upper and lower plates to each other; And, Step of forming a through-hole through which the fork of the forklift, etc. are inserted into each of the support plates :: a pallet manufacturing method using a short plastic sheet, characterized in that the progress made sequentially.

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