JP4914665B2 - Non-slip material for synthetic resin pallet and synthetic resin pallet formed by fixing the anti-slip material - Google Patents

Description

  The present invention relates to an anti-slip material as an anti-slip means used for a synthetic resin pallet and a synthetic resin pallet formed by fixing the anti-slip material.

  In recent years, pallets made of synthetic resin have been used as pallets for carrying and storing cargo. And as a synthetic resin material of this synthetic resin pallet, in particular, a polypropylene resin excellent in weather resistance, impact strength and bending strength is often used. However, the polypropylene resin has a drawback that the surface is slippery and the load placed on the deck board is likely to collapse due to slippage. In order to prevent such slipping of the deck board, a non-slip material made of a long flexible material is fixed to the pallet surface as an anti-slip material.

  FIG. 8 is an explanatory perspective view showing an example of a synthetic resin pallet having a non-slip material fixed to the surface. The pallet 1 connects an upper deck board 2 and a lower deck board 3 by a four-corner column 4, an intermediate column 5 provided in the middle, and a column provided in the center, and the columns 4, 5 and the upper and lower deck boards. This is a four-way pallet with a fork insertion hole 6 in the space surrounded by 2 and 3. A synthetic resin tape 7, which is a flexible material, is fixed to the surface of the pallet 1 as an anti-slip material. The upper surface side of the synthetic resin tape 7 protrudes slightly from the pallet surface, but the lower surface side is fitted into a tape groove provided on the pallet surface, and the back surface of the synthetic resin tape 7 and the tape groove These surfaces are fixed to the synthetic resin pallet by heat welding.

As the synthetic resin tape 7 which is a flexible material, for example, Japanese Patent Publication No. 63-38293 and Japanese Patent Laid-Open No. 11-35703 include an ethylene-vinyl acetate copolymer, a crosslinked ethylene propylene rubber, a modified polyolefin. Alternatively, it is described that a material comprising a blend of two or more of these and polypropylene, low density polyethylene, or ethylene / ethyl acrylate copolymer can be used.
Japanese Examined Patent Publication No. 63-38293 JP 11-35703 A

  The material used as the anti-slip material as described above is expensive, and has been a factor that increases the cost of the synthetic resin pallet to which the anti-slip material is fixed. Therefore, the inventors tried to reduce the cost by reducing the width dimension of the tape, which is an anti-slip material, or by reducing the thickness.

  However, in order to fix the tape, which is an anti-slip material, to the pallet, hot air is blown while fitting into the tape groove formed on the pallet surface, and the tape and the groove surface of the tape are heated and melted. Is done by pressing in. Therefore, if the width of the tape, which is a non-slip material, is reduced or the wall thickness is reduced, the amount of heat from the hot air is too much and the tape becomes too soft and meanders, and protrudes from the fitting groove. It could not be fixed linearly inside. Further, when changing the width and thickness of the tape, the width and depth of the groove for the tape must also be changed. Therefore, it is necessary to modify the mold of the manufactured synthetic resin pallet.

  Accordingly, the present invention provides a non-slip material for a synthetic resin pallet that can be fixed linearly without meandering while reducing the cost of the anti-slip material, and a synthetic resin pallet formed by fixing the anti-slip material. Is to provide.

The anti-slip material for a synthetic resin pallet according to the present invention is a tape-like anti-slip material that is fixed to at least a load placing surface of a synthetic resin pallet, and the tape-like core material on the tape-like main body portion serving as a surface layer The tape-shaped main body portion is formed with a soft synthetic resin such as a thermoplastic elastomer or a synthetic rubber to have a width dimension of 10 to 30 mm and a wall thickness dimension of 1 to 3 mm, and the tape-shaped core material is thin. It consists of a tape-like body and ridges provided on the lower surface of the tape-like body, and is formed of a hard synthetic resin such as a polyolefin resin.
Further, the anti-slip material for a synthetic resin pallet according to the present invention is formed by embedding a tape-shaped core material in a tape-shaped main body portion serving as a surface layer, and the tape-shaped main body portion is made of a thermoplastic elastomer, a synthetic rubber, or the like. A soft synthetic resin is formed with a width dimension of 10 to 30 mm and a wall thickness dimension of 1 to 3 mm, and the tape-shaped core material is formed into a T-shaped cross-section in which a protrusion for fitting is provided at the center of the tape-shaped body, A tip end portion of the fitting protrusion is protruded from the main body portion and embedded, and is formed of a hard synthetic resin such as a polyolefin resin.
And the synthetic resin pallet formed by fixing the anti-slip material according to the present invention can be formed by fixing any of the anti-slip materials having the above-described configuration.

The anti-slip material having the above structure is soft as a whole because the core material blocks the heating to the upper surface side even when hot air is blown onto the pallet surface and the core material retains hardness. The predetermined shape can be maintained without passing too much. Therefore, even if pressed by the roller, the tape can be linearly fixed in the fitting groove without meandering. Further, since the shape can be held by the core material even in the case of overheating, the overall thickness of the anti-slip material can be the same as that of the prior art or can be made thinner than the conventional one.
Moreover, in the synthetic resin pallet to which the anti-slip material according to the present invention is fixed, excellent effects were obtained in the welding strength of the anti-slip material and in the peeling by sliding on the roller conveyor.

  Hereinafter, the present invention will be described based on illustrated embodiments. FIG. 1 shows a first embodiment of the present invention, and an anti-slip material 10 is formed by embedding a core material 12 in a longitudinal direction in a main body 11 serving as a surface layer. The dimensions such as the width and thickness of the main body 11 can be the same as those of the conventionally used anti-slip tape, or rather smaller than the conventional one. The size of the main body 11 is a thin tape-like body formed with a width dimension of about 10 to 30 mm and a thickness dimension of about 1 to 3 mm in consideration of insertability of the core material 12 and prevention of meandering during heat welding. Or it is preferable to set it as a strip.

  As the material for forming the main body 11, the same soft synthetic resin as conventionally used can be used. For example, low density polyethylene, ethylene / vinyl acetate copolymer (EVA), ethylene / ethyl acrylate A synthetic elastomer such as a thermoplastic elastomer such as a copolymer (EEA), a styrene-butadiene rubber, or an acrylonitrile-butadiene rubber can be used.

  The core material 12 is a thin tape-like body and is embedded so as to be wrapped in the main body portion 11, and is formed of a hard synthetic resin such as a polyolefin resin such as polyethylene or polypropylene. What is necessary is just to determine the magnitude | size of the core material 12 suitably with the magnitude | size of the main-body part 11. FIG. In order to embed the core material 12, it can be molded and bonded separately, or co-extrusion molding is possible, but the material of the main body and the material of the core material are selected to be compatible. Coextrusion is preferred.

  Thus, by burying the core material 12 made of hard synthetic resin, even if hot air is sent and heated between the lower surface of the anti-slip material 10 and the pallet surface when heat-welding to the pallet surface, the core The material 12 does not heat the upper surface side of the main body 11 more than necessary. Accordingly, the anti-slip material 10 does not meander and protrude from the fitting groove when being pressed and welded by the roller.

  FIG. 2 shows a second embodiment, and only the cross-sectional shape of the core material 13 is different from the core material 12 of the first embodiment. That is, the anti-slip material 10A is formed by embedding the core material 13 which is provided with protrusions 13b at both end portions of the thin tape-like body 13a and is formed into a concave section as a whole. In the case of the first embodiment, when the upper surface of the anti-slip material 10 is loaded or unloaded, the upper surface side of the core material may be peeled off by the dragged luggage.

  However, by using the core member 13 with both ends protruding and the center recessed as in the second embodiment, the upper surface of the anti-slip material 10A is dragged when loading or unloading the load. Even if it is damaged by the above, the protruding portion 13b at both ends serves as a protective wall, and the main body portion 11 remains in the recessed portion in the central portion. Therefore, the remaining portion can function as a slip preventing material.

FIG. 3 shows the third embodiment, and shows a case where the core material 15 is constituted by a core material 15a made of a plurality of linear bodies, instead of the tape-shaped core material as in the first and second embodiments. That is, slip material 10B is formed by formed by embedding a core material 15 made by multiple parallel at appropriate intervals sectional circular line Article body 15a. As described above, even when the core member 15 is formed by arranging the linear members 15a in parallel, even if the upper surface of the anti-slip material 10B is damaged by luggage or the like, each of the linear members 15a is similar to the core member 13. Since the main body 11 remains in between, it can function as an anti-slip material. In addition, the cross-sectional shape of the filament 15a may be a triangle, a quadrangle, or the like.

FIG. 4 shows a fourth embodiment, and shows a case where the core member 17 is a net-like or lattice-like body and a large number of through holes are formed. That is, the anti-slip material 10C is formed by burying the core material 17 having the through holes 17c by connecting the parallel edge members 17a at both ends with the connecting material 17b.
In addition, the shape of the through-hole 17c is not limited to a square shape or a rhombus shape as in the embodiment, and may be an arbitrary shape such as a circle or a polygon. It is also possible to omit the edge member 17a.

As described above, even in the case of the net-like or lattice-like core material 17 having through-holes, even if the top surface of the anti-slip material 10C is damaged by luggage or the like, as in the case of the core material 13 and the core material 15, Since the main body portion 11 remains between each of 17c, it can function as an anti-slip material.

  FIG. 5 is a fifth embodiment showing a modification of the embodiment shown in FIG. 4. In the anti-slip material 10D, the parallel edge members at both ends are omitted, and both ends of the connecting member 18a are connected. It is formed by embedding the core material 18 that has been buried. Also in this embodiment, the same operations and effects as those in the second to fourth embodiments can be achieved.

  Further, FIG. 6 shows a sixth embodiment, and shows a case where the core material 19 is formed in a T-shaped cross section. That is, the anti-slip material 10E is formed by embedding a cross-sectional T-shaped core material 19 composed of a thin tape-like body and a ridge 19a provided at the center of the lower surface of the tape-like body. In addition, the protruding item | line 19a should just be provided in the lower surface of a tape-shaped object, and may be provided in both ends (equivalent to what turned the core material 13 of 10 A of anti-slip | skid materials described in FIG. 2 upside down). By embedding the core material 19 provided with the protrusions 19a on the lower surface of the tape-like body in the main body 11, the anti-slip material 10E meanders when the anti-slip material 10E is welded to the surface of the synthetic resin pallet. The prevention effect can be further increased.

  The anti-slip materials 10, 10A, 10B, 10C, 10D, and 10E are such that the core materials 12, 13, 15, 17, 18, and 19 are completely inside the main body 11 except for both ends in the longitudinal direction of the anti-slip material. By embedding in the core, the core material and the main body can be made difficult to peel off. The anti-slip material 10 </ b> E may be exposed even if the lower end surface of the ridge 19 a of the core material 19 is exposed on the back surface of the main body 11. That is, by exposing the lower end surface of the ridge 19a on the back surface of the main body 11, the back and front of the anti-slip material 10E can be easily identified, so there is no risk of erroneously welding the back and front of the anti-slip material 10E to the pallet. .

  FIG. 7 shows a seventh embodiment of the present invention, in which the ridges 19a of the core member 19 in the above-described embodiment are configured to protrude from the lower surface of the anti-slip material. That is, the anti-slip material 10F has a cross-sectional T-shaped core material 20 composed of a thin tape-like body 20a and a fitting protrusion 20b provided at a substantially central portion of the tape-like body 20a, and a tip end portion of the fitting protrusion 20b protruding. Embedded in the main body 11. On the other hand, a fitting groove 21a is formed at the center of the tape groove 21 provided on the surface of the corresponding pallet.

  In the seventh embodiment, when the anti-slip material 10F is welded, when the fitting protrusion 20b is fitted into the fitting groove 21a, the fitting protrusion 20b and the fitting groove 21a are positioned accurately and without meandering. Can be welded. Further, when the anti-slip material 10F with the fitting protrusion 20b protruding is used, meandering can be surely prevented, so that the overall thickness of the anti-slip material can be further reduced.

  Next, examples of the present invention will be described. Examples 1 to 3 targeted a polypropylene pallet, and used a styrene-based elastomer for the main part of the anti-slip material and a polypropylene (PP) resin for the core material. In Example 1, the overall width of the anti-slip material was 19 mm, the thickness was 1.9 mm, the core was a tape-like body, the width was 15 mm, and the thickness was 1.3 mm. In Example 2, the overall width of the anti-slip material was 15 mm, the thickness was 1.5 mm, the core was a tape-like body, the width was 14.4 mm, and the thickness was 0.9 mm. In Example 3, the width dimension of the entire anti-slip material is 15 mm and the wall thickness is 1.5 mm. The core is a concave section shown in Embodiment 2, the width dimension is 14.4 mm, and the wall thickness is at both ends. The thickness was 0.9 mm, and the central portion was 0.6 mm.

  On the other hand, Comparative Example 1 is for a polypropylene pallet, Comparative Example 2 is for a polyethylene pallet, and the anti-slip material is two layers of an upper surface layer that contacts the load and an adhesive layer that is welded to the pallet in both Comparative Examples 1 and 2. The structure. The upper surface layer of the anti-slip material is formed by EEA, the width dimension is 19 mm, the wall thickness is 1.6 mm, the width dimension of the adhesive layer is 19 mm, the wall thickness is 0.3 mm, and a comparative example for a polyethylene pallet. An adhesive resin was used for the adhesive layer 1 and a polyethylene resin was used for the adhesive layer of Comparative Example 2 for a polyethylene pallet.

  Comparative Example 3 is for a polyethylene pallet, and the anti-slip material has a two-layer structure as in Comparative Examples 1 and 2. The top surface layer of the anti-slip material is formed of EEA, the width dimension is 19 mm, The thickness was 0.9 mm, the adhesive layer was formed of polyethylene resin, the width dimension was 19 mm, and the wall thickness was 1.4 mm. Comparative Example 4 was a single-layer structure for a polypropylene pallet, and the anti-slip material was formed of a styrene-based elastomer, with a width dimension of 19 mm and a wall thickness of 1.9 mm.

  The anti-slip material having the above structure was welded to the pallet by blowing hot air as in the conventional case. About the said Examples 1-3 and Comparative Examples 1-4, the welding strength test, the roller conveyor sliding peeling test, and the sliding test were done. In the welding strength test, an anti-slip material is cut at a predetermined position and peeled off. The peeled end is held by a chuck, pulled downward against the anti-slip material, and the load when peeling is measured. The average peeling load was measured under the peeling conditions of chuck speed of 500 mm / min. In the roller conveyor sliding peel test, the anti-slipping material was checked for peeling by placing it on a horizontal roller conveyor with the anti-slip material side of the pallet carrying a load of 650 kg down and sliding it on the roller conveyor. The sliding speed was 25 cm / second. The distance until peeling is as shown in Table 1. In the sliding test, the pallets were stacked, the pallets were inclined at a rate of 45 ° / min, and the lifting angle when the pallet on the upper side of the stacked pallets began to slide was determined. This was performed according to JIS Z 0602 1988. The evaluation results are shown in Table 1.

  As apparent from Table 1 above, in each of the examples, both the welding strength test and the roller conveyor sliding peel test were extremely superior to the comparative example, and similar results were obtained in the sliding test. Further, in all of the examples, since it did not meander during hot air welding, it could be fixed linearly in the groove without protruding from the fitting groove.

It is a perspective view which shows 1st Example of the anti-slip | skid material which concerns on this invention. It is a perspective view which similarly shows 2nd Embodiment. It is a perspective view which similarly shows 3rd Embodiment. It is a perspective view which similarly shows 4th Embodiment. It is a top view which similarly shows 5th Embodiment. It is a perspective view which similarly shows 6th Embodiment. It is a perspective view which similarly shows 7th Embodiment. It is an explanatory perspective view which shows an example of the synthetic resin pallets which fixed the anti-slip | skid material on the surface.

Explanation of symbols

10, 10A, 10B, 10C, 10D, 10E, 10F: Anti-slip material
11: Main body
12, 13, 15, 17, 18, 19, 20: Core material

Claims (3)

A tape-shaped anti-slip material that is fixed to at least a load mounting surface of a synthetic resin pallet, and is formed by embedding a tape-shaped core material in a tape-shaped main body portion serving as a surface layer. A soft synthetic resin such as a plastic elastomer or synthetic rubber is used to form a width of 10 to 30 mm and a thickness of 1 to 3 mm. The tape-like core material is a thin tape-like member and a convex provided on the lower surface of the tape-like member. A non- slip material for a synthetic resin pallet made of a hard synthetic resin such as a polyolefin resin. A tape-shaped anti-slip material that is fixed to at least a load mounting surface of a synthetic resin pallet, and is formed by embedding a tape-shaped core material in a tape-shaped main body portion serving as a surface layer. A cross section in which a width dimension is 10 to 30 mm and a thickness dimension is 1 to 3 mm with a soft synthetic resin such as a plastic elastomer and a synthetic rubber, and the tape-shaped core material is provided with a projection for fitting at the center of the tape-shaped body. An anti-slip material for a synthetic resin pallet , which is formed in a T-shape, is embedded with a projecting tip of the fitting protrusion protruding from the main body, and is made of a hard synthetic resin such as polyolefin resin .   A synthetic resin pallet anti-slip material according to claim 1 or 2, wherein the anti-slip material is fixed by fitting into a fitting groove formed on the surface of the pallet. Resin pallet.

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