JP3221917U - Composites and skid-type pallets - Google Patents

Abstract

An object of the present invention is to provide a composite applied to a skid-type pallet, which has an elastic function and a durability against deflection. The composite material 10 includes a base material 11 formed of a square-shaped resin member and a metal reinforcing material 12 attached to the base material 11. The reinforcing material 12 is a base material 11. It extends along at least one longitudinal surface 113 of the longitudinal surfaces 112, 113, 114, 115 which extend along the longitudinal direction of the. [Selected figure] Figure 2

Description

  The present invention relates to composites and skid-type pallets.

  DESCRIPTION OF RELATED ART A load is loaded and the skid used for the cargo handling operation | work by a crane, a forklift, etc. is known. The skid is provided with a support girder and a receiving girder. The support girder is provided at a predetermined distance on the side of contacting the ground, and the receiving girder is provided at a predetermined distance crossing the support girder at a right angle.

  For example, there is known a skid-type pallet formed by assembling a support girder (base member) and a load receiving girder (skid member) of a square pipe made of steel in a grid shape (see, for example, Patent Document 1). The steel skid-type pallet is expected to have high strength because it can be lifted by a crane with the load placed thereon.

Utility model registration 3110445 gazette

  By the way, in the case of steel skid type pallets, the problem of strength can be easily solved by design considerations. However, a steel skid-type pallet is susceptible to permanent deformation due to impact or damage due to a drop collision, and may sometimes be damaged due to corrosion depending on the use environment and material. When steel materials are used, the overall weight tends to increase if it is intended to improve the strength, and the burden on the user increases and the product cost also increases.

  On the other hand, there are also wooden skid-type pallets that use wood for the support girder and the receiving girder. In the case of wood, the weight of the pallet can be significantly reduced compared to steel, and the pallet can be manufactured at low cost, but the strength and durability will be inferior to the steel pallet, Depending on the weight of the load, it may not be able to withstand the weight and may be damaged and may not be suitable for use in cargo handling operations.

  It is also considered to use a resin support girder and a receiving girder for a skid-type pallet. However, when the consignment girder on which the wire ropes are put on both ends at the time of cargo handling operation by a crane is formed of an elastic resin, the consignment girder exhibits elastic deformation behavior. Therefore, when the weight of the load is several tens of tons, the receiving girder has a large deflection. It is assumed that the wire rope will come off the end as a result of deflection of the consignment girder, so it is necessary to carry out the cargo handling operation with significantly reduced weight or to abandon the use of the resin material for the skid-type pallet Absent.

  Then, this invention is made in view of the said subject, and it aims at providing the technique provided with the tolerance with respect to bending, having an elastic function.

  In order to solve the above-mentioned subject, a composite material concerning the present invention is a composite material provided with a substrate made of a square-shaped resin member, and a metallic reinforcing material attached to the substrate, The reinforcing member extends along at least one longitudinal surface of a longitudinal surface extending along a longitudinal direction of the substrate.

  In addition, the base material is formed on the at least one longitudinal surface so as to be concave toward the side of the longitudinal surface opposite to the longitudinal surface, and has a storage portion extending along the longitudinal direction, and the reinforcement The material may be housed in the housing portion.

  Further, the reinforcing material may be fixed to the base material by a fixing member at a position 1/6 to 1/2 from one end of the base material in the width direction intersecting the longitudinal direction.

  Further, the base material has a second housing portion extending along another longitudinal surface perpendicular to the longitudinal surface having the housing portion, and the reinforcing member is formed in an L-shaped cross section. And the second housing portion may be housed in the housing portion.

  Further, the base material may have a load receiving surface that is one longitudinal surface in a positional relationship perpendicular to the longitudinal surface on which the housing portion is formed.

Also, the elastic modulus may be in the range of at least 60000 to 120000 N / mm ² .

  The elastic modulus of the base may be 1/100 or less of that of the reinforcing material.

  Furthermore, in order to solve the said subject, the skid type | mold pallet which concerns on this invention is characterized by being equipped with the said composite material.

  According to the present invention, it is possible to provide a technology having resistance to deflection while having an elastic function.

1 is a perspective view of a skid-type pallet according to an embodiment of the present invention. It is a figure which expands and shows the one end side of the compound girder in the skid type | mold pallet shown in FIG. It is sectional drawing in the cross section which crosses the extension direction of the composite girder of the skid type pallet concerning this embodiment, and Fig.3 (a) is a sectional view of the substrate of a composite girder, and FIG.3 (b) is a substrate Fig. 8 is a cross-sectional view of a composite girder having a reinforcing member attached thereto. It is sectional drawing which shows the modification of a composite girder. It is sectional drawing which shows another modification of a composite girder. It is sectional drawing which shows another modification of a composite girder. It is a figure which shows the outline of a test method.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The composite material according to the present invention is used for a receiving girder of a pallet on which a load such as a long steel plate is placed, and is applied to a skid-type pallet. The construction of the skid-type pallet to which the composite according to the present invention is applied is the same as the construction of the known skid-type pallet, and is not limited to a specific pallet.

  For example, the composite material according to the embodiment of the present invention is applied to the skid-type pallet 100 shown in FIGS. FIG. 1 is a perspective view of the skid-type pallet 100, and FIG. 2 is an enlarged view of one end portion of the receiving girder 1 in the skid-type pallet 100 shown in FIG. The skid-type pallet 100 is used for cargo handling operations such as lifting and hanging by a crane via a wire rope hung at both ends in the longitudinal direction in a state where a load is placed (see FIG. 7). ).

  The skid-type pallet 100 to which the composite material according to the embodiment of the present invention is applied comprises three receiving girder 1 and three supporting girder 3. The three receiving girders 1 are arranged parallel to each other at an interval. Three support girders 3 cross each other with respect to the respective receiving girders 1 and are connected to each other in a grid form, and are bridged between the receiving girders 1 at both ends. The number of digits 1 and 3 in the skid-type pallet 100 is not limited to this, and is appropriately changed according to the size of the skid-type pallet 100.

  The consignment girder 1 has two composite girder 10 and one simple girder 20. The composite girder 10 is formed of the composite material according to the present embodiment. The composite girder 10, ie, the composite material, has members formed of different materials. The composite girder 10 has a base material 11 formed of a square-shaped (rectangular column) -shaped resin member, and a metal reinforcing material 12 attached to the base material 11.

  Conventionally, when the receiving girder is formed only from a base material formed of a resin member having high elastic deformation behavior, for example, to suppress the deflection due to the weight of the load even if trying to change the cross sectional shape and increase the cross sectional rigidity. There was a limit. As a result of intensive studies by the present inventors, it was found that it is significant to attach a metal reinforcing material 12 to the substrate 11 in order to suppress the deflection of the resin member. Below, the structure of the compound girder 10 which concerns on this invention is demonstrated concretely.

  The substrate 11 has two end surfaces 111 and four longitudinal surfaces 112-115. The end surface 111 is a surface facing the longitudinal direction (axis) L of the base material 11. The longitudinal surfaces 112 to 115 extend in the longitudinal direction L perpendicular to the end surface 111. In the present embodiment, although the cross-sectional shape of the base material 11 is a square, the cross-sectional shape of the base material 11 is not limited thereto, and may be a rectangular shape or another polygonal shape. Since the cross-sectional shape of the base material 11 is a square, adjacent longitudinal surfaces 112 to 115 are in a positional relationship perpendicular to each other.

  Of the longitudinal surfaces 112 to 115 of the base material 11, for convenience of explanation, the longitudinal surface 112 of the composite girder 10 on which the load is to be placed is referred to as "receiving surface" and is in a positional relationship perpendicular to the receiving surface 112, The surface on which the reinforcing material 12 is attached is referred to as “longitudinal surface 113”, the surface parallel to the longitudinal surface 113 is referred to as “longitudinal surface 114”, and the surface parallel to the receiving surface 112 is referred to as “longitudinal surface 115”. The “cross-section” is a plane intersecting the longitudinal direction L of the substrate 11, and the “plane” is a plane along the longitudinal direction of the substrate 11. The composite girders 10 provided at both ends of the skid-type pallet 100 are arranged such that the longitudinal surfaces 112 of each other, that is, the reinforcing members 12 face each other.

  FIG. 3 (a) is a cross-sectional view of the base 11 of the composite girder 10, and FIG. 3 (b) is a cross-sectional view of the composite girder 10 in which the reinforcing material 12 is attached to the base 11. The base material 11 is a square member which is rectangular in a cross sectional view and rectangular in a plan view formed of a high elastic resin. Here, the base material 11 formed of a high elastic resin is preferably, for example, a synthetic resin body formed by the manufacturing method described in Japanese Patent No. 2766801.

  The base 11 has an accommodation recess (housing portion) 13. The housing recess 13 is formed on the side of the longitudinal surface 113. The housing recess 13 is formed in a substantially central portion of the base 11 between the receiving surface 112 and the longitudinal surface 115. The housing recess 13 is formed concave from the longitudinal surface 113 to the side of the longitudinal surface 114 and extends along the longitudinal direction L. The housing recess 13 is mainly defined by the mounting surface portion 131 and the two opposing surface portions 132, and has a slit portion (second housing portion) 133.

  The mounting surface portion 131 is a portion facing the side on which the longitudinal surface 113 faces, and extends along the longitudinal direction L of the base 11. The reinforcing material 12 is fixed to the base 11 at the mounting surface portion 131. The two opposing surface portions 132 extend perpendicularly from the end of the mounting surface portion 131 on the side of the receiving surface 112 and the longitudinal surface 115 to the side of the longitudinal surface 113 and extend along the longitudinal direction L. The slit portion 133 extends along the longitudinal surface 115, extends from the end of the mounting surface portion 131 on the side of the receiving surface 112 toward the longitudinal surface 114, and extends along the longitudinal direction L.

  The cross-sectional shape of the reinforcing member 12 is substantially L-shaped, and is formed of, for example, a metal plate such as iron, steel, stainless steel, or aluminum. The reinforcing material 12 is accommodated in the accommodation recess 13. The reinforcing member 12 has a mounting plate portion 121 and an entrance plate portion 122. The reinforcing material 12 is fixed to the base material 11 by a fixing member 14 described later at a substantially central position of the base material 11 in the width direction intersecting the longitudinal direction L. In addition, the position where the reinforcing material 12 is fixed is not limited to this, and is at a position of 1/6 to 1/2 from one end (for example, the longitudinal surface 115) of the base material 11 in the width direction intersecting the longitudinal direction L It may be fixed to the substrate 11 by the fixing member 14. The mounting plate portion 121 is formed with a plurality of through holes (not shown). The through holes are formed at equal intervals in the longitudinal direction L. The dimension in the width direction of the mounting plate portion 121 is substantially the same as the dimension between the pair of facing surface portions 132 of the accommodation recess 13.

  The reinforcing member 12 is in contact with the mounting surface portion 131 of the housing recess 13 at the mounting plate portion 121, and is fixed to the base material 11 by the fixing member 14 such as a screw, a nail, or a screw nail through the through hole. The plate thickness of the mounting plate portion 121 is such that it can be completely accommodated in the accommodation recess 13. As a result, the reinforcing material 12 is embedded in the base material 11 and does not protrude outward from the base material 11, so the composite girder 10 has excellent designability.

  The entry plate portion 122 is formed by bending the attachment plate portion 121 substantially at a right angle. The entry plate portion 122 enters into the slit portion 133. The entry plate portion 122 extends substantially parallel to the receiving surface 112 in a state of entering the slit portion 133. The thickness of the entry plate portion 122 is substantially the same as the width of the slit portion 133.

  Returning to FIG. 1, the simple girder 20 is located just halfway between the two composite girder 10. The simple girder 20 is a long rectangular block having a square cross section. The simple girder 20 is made of a high-elastic resin synthetic resin body similar to the base 11 of the composite girder 10.

  Each support girder 3 is arranged to cross each receiving girder 1 at equal intervals. The support girders 3 at both ends of the three support girders 3 are provided at positions shifted inward from both ends in the longitudinal direction L of the receiving girder 1. As a result, at both ends in the longitudinal direction L of the composite girder 10, it is possible to secure a portion to be hooked with a wire rope that is necessary when lifting the skid-type pallet 100. At a portion to which the wire rope is hooked, a plate member 200 made of, for example, aluminum, which is substantially L-shaped in cross section, is attached. The surface 30 of the support girder 3 facing the same side as the receiving surface 112 of the composite girder 10 is located on the side of the longitudinal surface 115 with respect to the receiving surface 112.

  When the wire rope is hung on the skid-type pallet 100 according to the present embodiment on which the load is placed and lifted, a load is applied to the receiving girder 1 of the skid-type pallet 100 in the longitudinal direction L. Since the wire rope is hung near the both ends, the cargo support girder 1 is bent with the position where the wire rope is hung as a fulcrum.

  According to the skid-type pallet 100 provided with the composite girder 10 as described above, the composite girder 10 has the metal reinforcing material 12 attached to the base material 11 formed of the high elasticity resin along the longitudinal direction L It is done. Thereby, even when a load is applied to the composite girder 10, the presence of the reinforcing material 12 causes the compression (shrinkage) generated on the side of the receiving surface 112 of the substrate 11 and the generated tension (elongation on the longitudinal surface 115). Can be suppressed.

  Further, since the entrance plate portion 122 is provided on the side of the receiving surface 112, the resistance to compression in the composite girder 10 can be improved. In the above embodiment, the entrance plate portion 122 is provided on the side of the receiving surface 112, but the composite girder 10 is turned upside down so that the longitudinal surface 115 is opposite to the receiving surface (longitudinal surface 112) may be provided. This can improve the resistance to pulling in the composite girder 10.

  Further, since the reinforcing material 12 is to be accommodated in the accommodating recess 13 in the base material 11 and the reinforcing material 12 does not protrude outward from the base material 11, the integrity of the base material 11 and the reinforcing material 12 is obtained. Thus, the skid-type pallet 100 can have excellent design.

  The reinforcing member 12 is fixed to the base 11 at a substantially central position on the longitudinal surface 113 of the base 11 by the fixing member 14. The position at which the reinforcing member 12 is fixed to the base material 11 by the fixing member 14 is such that, in the base material 11, the neutral axis extends such that the strain on the compression side and the strain on the tension side cancel each other and the strain becomes zero. Position. The composite girder 10 having excellent rigidity can be formed while suppressing bending deformation of the base material 11. The reinforcing member 12 may be fixed by the fixing member 14 on the side opposite to the receiving surface 112 with respect to the plane including the position where the neutral axis extends.

Further, the elastic modulus of the composite spar 10, 60000~120000N / mm ^2, preferably comprised within the range of 65000~100000mm ^2. If the modulus of elasticity is less than 60000 N / mm ² , the composite girder 10 is likely to be deformed, and there is a high possibility that the wire rope may be detached when it is lifted. In addition, when the elastic coefficient exceeds 120000 N / mm ² , the impact absorption of the composite girder 10 is impaired. Furthermore, the composite girder 10 which has buffer property suitable for protection of a load as the elastic modulus of the base material 11 is 1/100 or less of the elastic modulus of the reinforcing material 12 can be obtained.

  Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, but includes all aspects included in the concept of the present invention and the claims of the utility model registration. In addition, the respective configurations may be selectively combined as appropriate so as to achieve at least a part of the problems and the effects described above. For example, the shape, material, arrangement, size, and the like of each component in the above-described embodiment can be appropriately changed according to the specific use mode of the present invention. For example, in the above embodiment, the reinforcing member 12 is L-shaped in cross-sectional view, but may be U-shaped in cross-sectional view. In this case, the slit portion may be formed on the side of the longitudinal surface 115 as well.

  The composite girder according to the modification will be described below with reference to FIGS. In addition, about the same structure as said embodiment, description of a structure is abbreviate | omitted using the same code | symbol or the same name. FIG. 4 is a cross-sectional view showing a composite girder 10A according to a first modification. The composite girder 10A has a base 11A and a reinforcing material 12A. The base 11A has an accommodation recess 13A. The housing recess 13 </ b> A is formed on one longitudinal surface 113 located at a position perpendicular to the receiving surface 112. The reinforcing material 12A is formed of a long plate material having an I shape in cross section. When the weight of the load is smaller than the weight of the load placed on the skid-type pallet 100 equipped with the composite girder 10, using the skid-type pallet 100 equipped with the composite girder 10A equipped with the reinforcement 12A It is also good.

  FIG. 5 is a cross-sectional view showing a composite girder 10B according to a second modification. The composite girder 10B has a base 11B and two reinforcing members 12B1 and 12B2. The base 11B has two accommodation recesses 13B1 and 13B2. The housing recess (housing portion) 13 B 1 is formed on the longitudinal surface 113 at a position perpendicular to the receiving surface 112. The housing recess (second housing portion) 13B2 is formed on the longitudinal surface 115 in a position parallel to the receiving surface 112. Each of the reinforcing members 12B1 and 12B2 is formed of a long steel plate having an I shape in cross section.

  The composite girder 10B may be turned over, and the side on which the reinforcing material 12B2 is attached may be used as the receiving surface. Furthermore, a slit may be formed in the housing recess 13B, and the reinforcing member 12 having an L-shaped cross sectional view may be attached to the housing recess 13B1.

  FIG. 6 is a cross-sectional view showing a composite girder 10C according to the third modification. The composite girder 10C has a base 11C and a reinforcing material 12C. 11 C of base materials have the accommodation recessed part 13C of L-shaped cross sectional view. The accommodation recess 13 C is formed from the longitudinal surface 113 located at a position perpendicular to the receiving surface 112 to the longitudinal surface 115 located at a position parallel to the receiving surface 112. In the composite girder 10C, the accommodation recess (housing portion) on the longitudinal surface 113 side and the accommodation recess (second accommodation portion) on the longitudinal surface 115 side are continuous with each other.

  The reinforcing material 12C is formed of a long steel plate having an L-shaped cross sectional view. The reinforcing material 12C is accommodated in the accommodation recess 13C, and is fixed to the base material 11C by the fixing member 14 on each side of the longitudinal surfaces 113 and 115.

  The load of the loaded load and the like can be appropriately determined by those skilled in the art as to which of the composite materials 10 to 10C is used for the skid-type pallet 100.

Hereinafter, specific embodiments of the present invention will be described, but the present invention is not particularly limited to these embodiments. Examples 1 and 2 and Comparative Example 1 will be described below.
Example 1
Skid-type pallet provided with the composite girder 10 shown in FIG. 3 (b) (Example 2)
Skid-type pallet provided with the composite girder 10A shown in FIG. 4 (comparative example 1)
Skid-type pallet with only simple girder 20 without reinforcement

FIG. 7 is a diagram showing an outline of a test method. In each of Examples 1 and 2 and Comparative Example 1 described above, steel plates are loaded every 3750 kgf, and a wire rope is lifted by a crane. The deflection δ of the receiving girder of the skid-type pallet in a lifted state was measured, and the elastic modulus [N / mm ² ] was determined and evaluated based on the following criteria. Table 1 shows the results of the test.
The deflection δ of the composite girder 10, 10A in Examples 1 and 2 and the deflection δ of the simple girder in Comparative Example 1 were measured.

◎: The deflection δ at the receiving girder under a load of 15000 kgf is small, and there is no risk of the wire rope coming off the skid.
:: Although the deflection δ at the receiving girder under a load of 15000 kgf is a little large, there is no risk of the wire rope coming off the skid.
X: The deflection δ at the receiving girder under a load of 15000 kgf is large, and there is a risk that the wire rope may come off the skid.

  As shown in Table 1, in each of Examples 1 and 2 provided with the reinforcing material 12, the elastic coefficient is significantly larger than that in Comparative Example 1 not provided with the reinforcing material 12. This is a proof that the reinforcing material 12 enhances the rigidity of the base material 11 and is less likely to be deformed as a whole of the composite girder 10.

Reference Signs List 1 receiving girder 10 composite girder 11 base 12 reinforcing material 112 to 115 longitudinal surface 13 receiving portion (receiving recess)
14 Fixing member 20 Simple girder 3 Support girder

Claims (8)

A base material formed of a square-shaped resin member,
A metal reinforcement attached to the substrate;
A composite comprising
The composite material, wherein the reinforcing material extends along at least one longitudinal surface of a longitudinal surface extending along a longitudinal direction of the substrate. The base material is formed on the at least one longitudinal surface so as to be concave toward the side of the longitudinal surface opposite to the longitudinal surface, and has a receptacle extending along the longitudinal direction.
The composite material according to claim 1, wherein the reinforcing material is housed in the housing portion. The substrate has a second receptacle extending along another longitudinal surface perpendicular to the longitudinal surface having the receptacle.
The composite material according to claim 2, wherein the reinforcing material is formed into an L-shaped cross section and is accommodated in the accommodation portion and the second accommodation portion.   The composite material according to claim 2 or 3, wherein the base material has a load receiving surface that is one longitudinal surface in a positional relationship perpendicular to the longitudinal surface on which the housing portion is formed.   The reinforcing member is fixed to the base material by a fixing member at a position 1/6 to 1/2 from one end of the base material in a width direction intersecting the longitudinal direction. Composite according to any one of the preceding four. 6. A composite according to any one of the preceding claims, characterized in that the modulus of elasticity is at least in the range of 60000 to 120000 N / mm < ² >.   The composite material according to any one of claims 1 to 6, wherein the elastic modulus of the base material is 1/100 or less of that of the reinforcing material.   A skid pallet comprising a composite according to any one of the preceding claims.

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