JP2009262934A - Shock-absorbing plate for transporting cargo - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shock-absorbing plate for transporting cargoes which is capable of effectively demonstrating a shock-absorbing action, hardly damaged, repeatedly usable, lightweight, and excellent in handling properties. <P>SOLUTION: In the shock-absorbing plate for transporting cargoes having a rectangular plate-like shape, a reinforcing film 7 as a PET film is affixed via an adhesive to the entire surface of a surface side 5 and a back side 6 of a shock-absorbing substrate 3 with six foam plates 2 of closed cell polyolefin resin being layered on and integrated with each other. A polyethylene film 12a is affixed via an adhesive over the entire surface 11 of the reinforcing film 7. An end face cover sheet 19 is affixed via an adhesive so as to cover an edge portion 20 of the shock-absorbing substrate 3 including an end face 17 of the shock-absorbing substrate. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a shock-absorbing shock-absorbing plate. More specifically, the load-carrying shock-absorbing plate prevents a load collapse or a collision between loads when the load is loaded on a truck bed. The present invention relates to a shock-absorbing shock-absorbing plate that can be easily handled.

  When transporting with a load on the truck bed, it has been conventional to install a buffer plate between the loads to prevent the cargo from collapsing or colliding with each other during transport. Yes.

  As this buffer plate, a plate made of polystyrene foam is often used. However, the plate made of polystyrene foam is damaged by cracking or chipping due to an impact during loading or unloading of luggage. In addition to being easy to use repeatedly, there was a problem that debris or powder generated due to damage became trash or easily adhered to luggage. In addition, since the surface is hard, the buffering property may be insufficient.

  In view of such problems, JP-A-2004-75115 discloses a plate-shaped buffer plate made of a polyolefin resin foam that is resistant to repeated use and is lightweight and excellent in buffering properties.

  Although the buffer plate is excellent in buffering properties, when its length (height) is large, large deflection is likely to occur. For this reason, there are problems inferior in handling properties, such as being difficult to carry and being difficult to interpose because the upper portion is bent when interposing between packages.

JP 2004-75115 A

  The present invention has been developed in view of the above-mentioned conventional problems, can exhibit a buffering effect effectively, can be used repeatedly without being damaged, is lightweight and excellent in handleability, and has a plate-like form. It is an object of the present invention to provide a baggage transporting shock absorber that is stably held and has improved handling during transportation and use.

In order to solve the above problems, the present invention employs the following means.
That is, the load carrying shock plate according to the present invention is a load carrying shock plate having a rectangular plate shape or a square plate shape, and is provided between the front and back surfaces of the buffer substrate made of a closed-cell foamed plate of polyolefin resin. A reinforcing film selected from a pet film, a polypropylene film, and a polyethylene film is bonded to the entire surface of each.

  Adhering an adhesive film as a polyethylene film or an ethylene-vinyl acetate copolymer film, which can be an adhesive to be bonded to the buffer substrate by being partially melted, to the back surface of the reinforcing film. Good.

  When the reinforcing film is made of a pet film or a polypropylene film, the polyethylene film is preferably adhered to the entire surface of the reinforcing film via an adhesive.

  When the reinforcing film is a biaxially stretched pet film or a polypropylene film, the reinforcing film is attached to each of the front surface and the back surface in accordance with the extending direction of each side of the buffer substrate. It should be configured as a thing.

  A plastic end face cover sheet is preferably bonded over the entire end face of the buffer substrate.

  The buffer substrate may be configured with a single foam plate, or may be configured by stacking and integrating a plurality of closed-cell foam plates of the polyolefin resin.

The present invention has the following excellent effects.
Since the present invention adopts the above-described configuration, it can effectively exhibit a buffering effect, is difficult to be damaged and can be used repeatedly, is lightweight and excellent in handleability, and the plate-like form is stably maintained. In addition, it is possible to provide a load carrying shock-absorbing plate having improved handling properties during carrying and use.
Hereinafter, this will be described more specifically.

(1) The load carrying shock plate according to the present invention comprises a shock absorbing substrate made of a polyolefin resin foam plate such as polypropylene or polyethylene. It is resistant to repeated use, unlike the spacers made of
Since the baggage carrying buffer plate has a reinforcing film such as a PET film, a polypropylene film, or a polyethylene film bonded to the entire surface of the buffer substrate, the surface of the buffer substrate is damaged. Since the bending rigidity is improved by the tensile resistance of the reinforced film that is hard to stretch, it is easy to bend and deform easily when it is a buffer board alone, but it is effectively prevented from being deformed, and the plate shape Is stably maintained. In particular, when a biaxially stretched PET film or a polypropylene film is bonded as described above, the tensile resistance of the reinforcing film is increased, so that the bending rigidity can be further improved, and both in the vertical direction and in the horizontal direction. In addition, it is possible to provide a load carrying shock absorbing plate that is more difficult to bend. Therefore, it is possible to provide a baggage transporting buffer plate that is excellent in handleability when the baggage transporting buffer plate is carried by hand or when the baggage transporting buffer plate is interposed between packages.

(2) When the adhesive film is attached to the back surface of the reinforcing film, in addition to being able to more firmly attach the reinforcing film to the buffer substrate, the reinforcing film can be made more difficult to tear, When this is broken, there is an effect that the expansion of the crack can be suppressed.

(3) In particular, when PET film or polypropylene film is used as the reinforcing film, when the polyethylene film is laminated on these bonded reinforcing films, the surface will be torn or damaged even when subjected to impact such as impact impact. It is possible to provide a shock-absorbing shock-absorbing plate.

(4) In addition, when a plastic end face cover sheet is bonded to the end face of the buffer substrate, the end face can be effectively protected from damage, and the end face can be prevented from being soiled. It is possible to provide a load carrying shock absorbing plate excellent in durability, which can prevent a reinforcing film or the like adhered to the back surface from being peeled off at the edge of the end surface and contributes to an improvement in the bending rigidity of the buffer substrate. become.

(5) In particular, when the buffer substrate is formed by stacking and integrating a plurality of foam plates, there is an advantage that a buffer substrate having a desired thickness can be easily manufactured according to the number of stacked sheets.

  1-4, the load carrying shock-absorbing plate 1 according to the present invention has a vertically long rectangular plate shape, and is composed of one piece of a closed-cell foamed plate 2 of polyolefin resin, or a plurality of such pieces are stacked and integrated. A reinforcing film 7 is attached to the entire surface 5 and back surface 6 of the buffer substrate 3 formed through an adhesive. The foam plate 2 may be made of a bead foam or an extruded foam.

  As the reinforcing film 7, a pet film 7a, a polypropylene film 7b, or a polyethylene film 7c can be adopted. In this embodiment, as shown in FIG. 5, an adhesive 9 having a melting point lower than that of the reinforcing film 7, such as a polyethylene resin or an ethylene-vinyl acetate copolymer, is provided on the back surface 8 of the reinforcing film 7. Thus, an adhesive film as an polyethylene film or ethylene-vinyl acetate copolymer film (for example, colored in blue or the like having a thickness of about 30 μm, which can be used as an adhesive for the buffer substrate 3 by being partially melted. Thing) 10 is stuck. When the reinforcing film 7 is a pet film 7a or a polypropylene film 7b, a polyethylene film 12a as a cover film 12 is formed over the entire surface 11 of the reinforcing film 7 as shown in FIGS. In some cases, it is attached via an adhesive.

  This will be described in more detail mainly with respect to the load carrying buffer plate 1 shown in FIG. However, for convenience of explanation, in the figure, the reinforcing film 7 and the cover film 12 are shown to be thicker than actual.

  The buffer substrate 3 has a thickness of about 30 mm, for example, and a short side length (lateral length as viewed in a standing state interposed between luggage) L1 is set to 700 to 1200 mm, for example, 1000 mm. At the same time, it has a rectangular plate shape with a long side length (longitudinal length as viewed in a standing state interposed between luggage) L2 of 1500 to 2300 mm, for example, 2000 mm. The buffer substrate 3 is formed by stacking a plurality of the foamed plates 2 of, for example, a 5 mm thick rectangular plate, which is a closed cell type of polyethylene, which is a kind of polyolefin resin, They are integrated through heat fusion or an adhesive.

  In the present embodiment, the buffer substrate 3 is formed by stacking a plurality of foamed plates 2 having a thickness of 5 mm and each part being in a substantially uniform foamed state, so that each part is in a substantially uniform foamed state. A certain buffer substrate 3 can be set to a desired thickness according to the number of stacked substrates. In this embodiment, the thickness of the buffer substrate 3 is set to about 30 mm as described above, for example, by stacking and integrating the six foam plates 2. The thickness of the buffer substrate 3 can be set as required according to the thickness of the foam plate 2 and the number of stacked sheets. For example, it can be set to 10-60 mm, preferably 20-50 mm.

  Further, the PET film 7a, the polypropylene film 7b, and the polyethylene film 7c (FIG. 1) as the reinforcing film 7 are 20 to 100 .mu.m thin, and in this embodiment, those having 25 to 60 .mu.m are used. Yes. The pet film 7a and the polypropylene film 7b are more preferably biaxially stretched films. In this case, as shown by an arrow in FIG. 3A, the stretching direction (X, Y) is adhered to the front surface 5 and the back surface 6 in accordance with the vertical direction and the horizontal direction of the buffer substrate 3.

  In the present embodiment, as shown in FIG. 5, the adhesive film 10 is adhered to the back surface 8 of the reinforcing film 7 via an adhesive 9. In the present embodiment, a cover film 12 as a polyethylene film 12a is adhered to the surface 11 of the reinforcing film 7 with an adhesive 16 interposed therebetween.

  For example, when the reinforcing film 7 is a pet film 7a or a polypropylene film 7b, an adhesive having a melting point lower than these, such as polyethylene or ethylene-vinyl acetate copolymer (for example, a coating applied to the reinforcing film in advance and heating). The adhesive film 10 as a polyethylene film or an ethylene-vinyl acetate copolymer film is attached via 9). When the reinforcing film 7 is a polyethylene film, an adhesive film 10 as a polyethylene film is attached via an adhesive 9 such as an ethylene-vinyl acetate copolymer having a lower melting point than this. Alternatively, the adhesive film 10 as an ethylene-vinyl acetate copolymer film is bonded by thermal fusion. A polyethylene film 12a is formed on the surface 11 of the reinforcing film 7 through an adhesive 16 such as polyethylene or an ethylene-vinyl acetate copolymer (for example, a film previously coated on the reinforcing film and exhibiting an adhesive action by heating). The cover film 12 is attached.

  When the buffer substrate 3 is made of a polypropylene foam plate, an adhesive film 10 made of, for example, an ethylene-vinyl acetate copolymer, which melts part of the buffer substrate 3 by heating and exhibits an adhesive action to the buffer substrate 3 of the polypropylene, is used. In the same manner as described above, it can be attached via an adhesive 16 such as polyethylene or ethylene-vinyl acetate copolymer having a melting point lower than that of the reinforcing film.

  Explaining the function and effect of the load carrying shock absorbing plate 1 having such a structure, the shock absorbing substrate 3 having the above structure does not absorb water because the foamed plate 2 is of the closed cell type, and is lightweight and excellent. It can exhibit a buffering action and is unlikely to be damaged unlike a conventional baggage carrying shock absorber made of polystyrene foam. And since the pet film 7a, the polypropylene film 7b, and the polyethylene film 7c (FIG. 1) which are difficult to stretch are pasted over the entire surface 5 and the back surface 6 of the buffer substrate 3, Although the buffer substrate 3 is easy to bend and deform, the bending rigidity of the buffer substrate 3 is improved by these reinforcing films 7, and the load carrying buffer plate 1 has a long side (for example, a thickness). When the short side length L1 is 1000 mm and the long side length L2 exceeds 1200 mm, etc., the tip side portion can be prevented from being bent and kept flat. Will be. In particular, when a biaxially stretched PET film or a biaxially stretched polypropylene film is attached as described above, the reinforcing film 7 is more difficult to stretch, and therefore it is more difficult to bend in the longitudinal and lateral directions. A buffer plate can be provided.

  In the present embodiment, as described above, since the polyethylene film 7c is adhered over the entire front surface 5 and back surface 6 of the buffer substrate 3, the pet film 7a and the When the object hits the surface of the polypropylene film 7b, these films may be broken, but the film can be made more difficult to break by the protective action due to the flexibility of the polyethylene film (cover film) 12a. Moreover, when it is torn, the crack can be difficult to expand. Further, in this embodiment, since the adhesive film 10 is adhered to the back surface 9 of the reinforcing film 7, the adhesive film 10 is adhered to the buffer substrate 3 by the melt when the adhesive film 10 is heated. In addition to being able to be firmly attached, the adhesive film 10 can make the reinforcing film 7 more difficult to tear, and when it is torn, there is also an effect of suppressing the expansion of the crack. When the reinforcing film 7 is a biaxially stretched pet film or a biaxially stretched polypropylene film having a particularly small stretch margin, the protective effect of preventing tearing by the polyethylene film 7a appears more remarkably.

  More preferably, as shown in FIGS. 3 and 4, the load carrying shock-absorbing plate 1 may cover the entire end surface 17 of the shock-absorbing substrate 3 with an end-face cover sheet 19. In the figure, an end face cover sheet 19 having a U-shape, for example, is attached via an adhesive so as to cover the edge portion 20 of the buffer substrate 3 including the end face 17. The sticking portion 21 of the end face cover sheet 19 has a frame shape.

  As another aspect which coat | covers the said end surface 17 with the said end surface cover sheet | seat 19, as shown, for example in FIGS. 6-7, the film 22 affixed on the surface 5 or the back surface 6 of the buffer substrate 3 is this surface 5 or Lamination is carried out by laminating from the edge of the back surface 6 (front surface 5 in the figure), and the protruding edge portion 23a is bent at one edge 25a of the end surface 17 so as to overlap and adhere to the end surface 17 Can do. In FIGS. 6 to 7, the front side portion 23 a 1 of the protruding edge portion 23 a is bent at the other edge 25 b of the end surface 17, and is attached to the other surface (back surface 6 in the figure). It adheres to the edge portion 24 of 22.

  Alternatively, as shown in FIGS. 8 to 9, the film 22 adhered to the front surface 5 or the back surface 6 of the buffer substrate 3 is laminated in a state of protruding from the edges of the front surface 5 and the back surface 6, and the protruding edge portion 23 b. , 23c are bent at the edges 25a, 25b of the end face 17 and overlapped and bonded to the end face 17. In FIG. 8, one protruding edge portion 23b is bent at the edge 25a of the end surface 17 and bonded to the end surface 17, and then the other protruding edge portion 23c is attached to the one of the adhered ones. It can be performed by overlapping and adhering to the edge portion 23b. In FIG. 9, one protruding edge portion 23 b is bent at one edge 25 a of the end surface 17, and overlapped and bonded to the end surface 17, and then the other protruding edge portion 23 c is a proximal end portion. 23c2 is bent at the other edge 25b of the end surface 17, and is overlapped and adhered to the edge portion 23b bonded to the end surface 17, and the front side portion 23c1 of the edge portion 23c is bonded to the other surface (FIG. Is adhered to the edge portion 24 of the film 22 adhered to the back surface 5).

  Furthermore, as shown in FIG. 10, the end surface cover sheet 19 having a size covering the end surface 17 can be overlapped and adhered to the end surface 17. These adhesions can also be performed by heat fusion.

  The end face cover sheet 19 that covers the end face 17 is formed by overlapping the polyethylene film (cover film) 12a on the reinforcing film 7 or the reinforcing film 7 in consideration of adhesive strength to the end face 17 and the like. In addition to using the film as it is, a sheet different from the film, for example, a sheet having a mesh structure in which stretch-reinforced polyolefin fibers are laminated and heat-sealed longitudinally and laterally (for example, Nisseki Wallif) "Product name") and other plastic sheets can be used.

  When the buffer substrate 3 is extruded in one direction as shown in FIG. 11, the coating of the end faces 17a and 17a on both sides is preferably according to the coating procedure shown in FIGS. The end surface 17b may be covered by the covering procedure shown in FIGS. 3B and 4B.

  When covering the end face 17 in this way, the end face 17 of the buffer substrate 3 can be effectively protected from damage, and the end face 17 can be prevented from becoming dirty. As shown in FIGS. 3 to 4 and FIGS. 6 to 9, when the reinforcing film 7 or the like is attached to the front surface 5 or the back surface 6, the attached reinforcing film 7 or the like is peeled off at the edge 26 of the end surface 17. It is possible to provide a shock-absorbing shock-absorbing plate excellent in durability without fear. Moreover, as shown in FIG. 3B, FIG. 4B, and FIGS. 6-9, when the end surface 17 is covered with the end surface cover sheet 19, it can contribute to the bending rigidity improvement of the said buffer substrate 3. FIG.

  Next, a usage mode of the load carrying buffer plate 1 having such a configuration will be described. When carrying a load carrying shock-absorbing plate 1 from a storage place to a truck while loading the load on a truck bed, the load carrying shock-absorbing plate 1 is relatively long (for example, When the thickness is 30 mm and the short side length L1 is 1000 mm, even if the long side length L2 exceeds 1200 mm, the plate-like form is well maintained and can be easily transported. . Then, as shown in FIG. 12, when the load 29 loaded on the pallet 27 is placed on the loading platform 30 of the truck, when the load carrying buffer plate 1 is interposed between the loads 29 and 29, Since the flat plate state can be maintained without causing bending even when the load carrying buffer plate 1 is in an upright state, the interposing work can be reliably performed with good workability. The load carrying buffer plate 1 may be placed upright between the truck's tilt and the load. Alternatively, the load carrying buffer plate 1 may be used by laying on the cargo bed floor of the truck or stacking the load in two stages. It is also possible to intervene between the upper and lower packages.

  The present invention is not limited to what is shown in the above-described embodiments, and it goes without saying that various design changes can be made within the scope of the claims. One example is as follows.

(1) When the reinforcing film 7 is made of the same material as the buffer substrate 3, for example, the reinforcing film 7 is bonded to the front and back surfaces of the buffer substrate 3 by thermal fusion without using an adhesive. There is also.

(2) The polyethylene film may not be adhered to the surface of the reinforcing film 7.

(3) If the shock-absorbing shock-absorbing plate 1 according to the present invention is a closed-cell foamed plate made of polyolefin resin, the above-mentioned closed-cell foamed plate made of polypropylene or the above-mentioned closed-cell foamed plate made of polyethylene is used. However, the present invention is not limited to this, and can be configured with closed-cell foamed plates of various polyolefin resins.
Among the polyolefin resins, examples of the polyethylene resins include low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, ethylene-α-olefin copolymer, ethylene-vinyl acetate copolymer, and the like. Or a mixture of two or more of these. Examples of the polypropylene resin include homopolypropylene, propylene-α-olefin copolymer, propylene-vinyl acetate copolymer, and the like, and may be a mixture of two or more of these.

(4) The load carrying buffer plate 1 is usually formed in a rectangular plate shape, but may be formed in a square plate shape.

(5) When the polyethylene film (cover film) 12a is adhered, the film in which the polyethylene film 12a is laminated and adhered to the polypropylene film 7b is adhered to the front surface 5 and the rear surface 6 of the buffer substrate 3; It is good also as sticking the polyethylene film 12a on the surface of this polypropylene film 7b, after sticking the polypropylene film 7b on the surface 5 and the back surface 6 of the buffer substrate 3. FIG.
These films are adhered to an adhesive that melts at a lower temperature than the reinforcing film 7, such as polyethylene or ethylene-vinyl acetate copolymer, on one surface of the pet film 7a, polypropylene film 7b, polyethylene film 7c, polyethylene film 12a. It is good to carry out using what is coated beforehand.

(6) When the buffer substrate 3 is configured by stacking and integrating a plurality of closed-cell foamed plates of the polyolefin resin, the same type of foamed plates may be stacked and integrated. In some cases, the foamed plates are integrated and stacked. For example, the polypropylene foam plate is stiff and the polyethylene foam plate is flexible, but the polypropylene foam plate is sandwiched between two polyethylene foam plates by taking advantage of the characteristics of each foam plate. The required foamed plates can be stacked as required in accordance with the purpose of use of the load carrying buffer plate.

(7) When the reinforcing film 7 is a biaxially stretched polypropylene film, the unstretched polypropylene film is placed on the entire surface of the reinforcing film 7 via an adhesive. Sometimes stuck.

It is the perspective view and partial expanded sectional view which show the shock-absorbing board for luggage conveyance which concerns on this invention. It is the perspective view and partial expanded sectional view which show the other Example of the shock-absorbing buffer board which concerns on this invention. It is the perspective view and partial expanded sectional view which show the other Example of the shock-absorbing shock-absorbing board according to the present invention. It is the perspective view and partial expanded sectional view which show the other Example of the shock-absorbing shock-absorbing board according to the present invention. It is sectional drawing which shows the reinforcement film with which the adhesive film was stuck. It is sectional drawing which shows the other aspect which coat | covers the end surface of a buffer substrate. It is sectional drawing which shows the other aspect which coat | covers the end surface of a buffer board | substrate. It is sectional drawing which shows the other aspect which coat | covers the end surface of a buffer board | substrate. It is sectional drawing which shows the other aspect which coat | covers the end surface of a buffer board | substrate. It is sectional drawing which shows the other aspect which coat | covers the end surface of a buffer board | substrate. It is explanatory drawing explaining the coating point of the end surface of both sides in the case of extruding a buffer substrate, and the cut | disconnected end surface. It is explanatory drawing which shows the use condition of the shock-absorbing buffer plate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Buffer board for carrying goods 2 Foam board 3 Buffer board 5 Front surface 6 Back surface 7 Reinforcing film 10 Adhesive film 12 Cover film 13 Abutting surface 17 End surface 19 of buffer substrate 19 End surface cover sheet

Claims (6)

  A shock carrying plate for carrying goods having a rectangular plate shape or a square plate shape, and a pet film, a polypropylene film, and a polypropylene film, A shock-absorbing shock-absorbing board, wherein a reinforcing film selected from polyethylene films is adhered.   An adhesive film as a polyethylene film or an ethylene-vinyl acetate copolymer film that can be used as an adhesive to be bonded to the buffer substrate by being partially melted is attached to the back surface of the reinforcing film via an adhesive. The load carrying buffer plate according to claim 1, wherein:   2. The load carrying buffer according to claim 1, wherein when the reinforcing film is made of a pet film or a polypropylene film, a polyethylene film is adhered to the entire surface of the reinforcing film via an adhesive. Board.   The reinforcing film is a biaxially stretched pet film or a polypropylene film, and the reinforcing film is attached to each of the front surface and the back surface so that the stretching direction thereof matches the extending direction of each side of the buffer substrate. The load carrying buffer plate according to claim 1, wherein:   2. The load carrying buffer plate according to claim 1, wherein an end cover sheet made of plastic is bonded to the entire end surface of the buffer substrate.   3. The load carrying buffer plate according to claim 1, wherein the buffer substrate is formed by stacking and integrating a plurality of closed cell foam plates of the polyolefin resin.

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