JPH0676052U - palette - Google Patents

Abstract

(57) [Abstract] [Purpose] A synthetic resin foam having a high expansion ratio is used as a deck board to provide a lightweight pallet that is excellent in light weight and has a high joint strength between the legs and the deck board. [Structure] The leg portion 3 is joined to the back side reinforcing material layer 6 surface of the deck board 2 in which the reinforcing material layers 5 and 6 are provided on both sides of a synthetic resin foam having a foaming ratio of 7 times or more, and the deck board 2 is formed. Leg 3
Is a pallet 1 in which the
, A reinforcing material 6a having a through hole having an end shape of the leg portion 3 at the leg mounting position and a reinforcing material 6b having no through hole are laminated to provide a leg mounting concave portion, and the leg portion is provided in the concave portion. Insert the end of 3 and join. A tubular member or the like can be used as the leg portion 3. In the case of a tubular leg member, the joining assisting material 7 is inserted into the inner surface of the leg portion 3, and the leg portion 3 is joined.
With it, it can be joined to the deck board 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pallet, and more particularly to a pallet using a synthetic resin foam plate for a deck board.

[0002]

[Prior art]

 Conventionally, wooden pallets have been mainly used as a pallet for the purpose of loading and moving the product when storing or shipping the products produced in factories, but compared to wooden pallets. In recent years, pallets made of synthetic resin foam have been widely used because of their light weight, ease of handling, stain resistance and hygiene.

As a pallet made of synthetic resin foam, for example, a plurality of tubular legs are sandwiched at appropriate intervals between deck boards made of two synthetic resin foams having an expansion ratio of about 2 to 5 times. The pallet (actually No. 47-26852), which is adhered with, and fixed with bolts and nuts that penetrate the hollow parts of the cylindrical legs from the upper and lower deck board surface sides, synthetic resin with a foaming ratio of 1 to 6 times. A mating recess is provided on the back layer side of a deck board having a honeycomb structure in which a honeycomb core material is sandwiched between a front surface layer and a back surface layer made of a foam plate, and the fitting convex portion of the leg is provided in the fitting recess. There is known a pallet having a structure in which two deck boards and legs are integrally formed by fitting and heat-sealing (Saikai Sho 57-196642) and the like.

In the above-mentioned conventional synthetic resin foam pallet, in order to further increase the bonding strength between the deck board and the legs, adhesion and heat fusion, fixing with bolts and nuts, and legs in the fitting recesses are performed. The means for fitting the fitting convex portion of the section are also used.

[0005]

[Problems to be solved by the device]

 However, in the conventional synthetic resin foam pallet in which the legs are directly bonded or heat-sealed to the synthetic resin foam that constitutes the deck board, fixing with bolts and nuts, fitting, etc. Even if the means are used together, sufficient bonding strength can be obtained when the foam has a low expansion ratio of about 6 times or less, and when a foaming body having a higher expansion ratio is used, the pallet When a load was applied to the foam, there was a problem that the joint of the foam and the leg was easily damaged. Therefore, in the conventional synthetic resin foam pallet, it is unavoidable to use a foam having a low expansion ratio, and therefore the lightness characteristic of the synthetic resin foam pallet has not been fully utilized. .

Further, as in the pallet described in Japanese Utility Model Application Laid-Open No. 47-26852, if a fixing means such as a bolt and nut is used in addition to the adhesion, there is a problem that the work of assembling the pallet becomes complicated.

The present invention has been made in view of the above points, and uses a synthetic resin foam body having a higher expansion ratio than that of a conventional one for a deck board, which is excellent in lightness and is excellent in the bonding strength between the deck board and the legs. The purpose is to provide an excellent and robust pallet.

[0008]

[Means for Solving the Problems]

 The pallet of the present invention is integrated with a deck board in which a reinforcing material layer is provided on both sides of a synthetic resin foam plate having a foaming ratio of 7 times or more, and by bonding or heat fusion to the reinforcing material layer surface on the back surface of the deck board. Also, it is characterized by comprising a plurality of legs. In the pallet of the present invention, a reinforcing member provided on the back side of the deck board is provided with a non-penetrating leg mounting recess having a leg end shape, and the leg end is inserted into the recess so that the leg end is inserted. The part can be joined and integrated with the deck board. In this case, the leg mounting recess provided in the reinforcing material layer on the back side of the deck board has a reinforcing material having a through hole having a leg end shape in the leg mounting portion and a through hole in the leg mounting portion. It is preferably formed by laminating a reinforcing material which is not provided.

Further, it is preferable to use hollow cylindrical ones as the leg portions in the pallet of the present invention. In addition, a tubular leg with at least one end open or a tubular leg with both ends open can be used. In this case, insert a joining aid into the inner space of the leg and join the open side of the leg. The deck board and the legs can be integrated by joining them to the back of the deck board together with the auxiliary material.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

1 to 3 show one embodiment of the pallet 1 of the present invention, in which 2 is a deck board and 3 is a leg portion.

As shown in FIG. 2, the deck board 2 is formed by providing reinforcing material layers 5 and 6 on both surfaces of a synthetic resin foam body 4. As shown in FIG. 2, a plurality of leg portions 3 are joined to the back surface of the deck board 2 at appropriate intervals. As shown in FIG. 3, the leg portion 3 has a non-penetrating leg mounting recess having a leg end shape in the reinforcing material layer 6 on the back surface side of the deck board 2, and the leg portion 3 is provided in the recess. The ends of the are fitted and joined together.

As the synthetic resin constituting the synthetic resin foam 4, a hard or semi-hard synthetic resin is preferable, and examples thereof include polystyrene, styrene / maleic anhydride copolymer, styrene / acrylic acid copolymer, and styrene / Styrenic resins such as methacrylic acid copolymers, styrene / ethylene copolymers, styrene / acrylonitrile copolymers, styrene / butadiene copolymers, styrene / acrylonitrile / butadiene copolymers; polypropylene, propylene / ethylene random copolymers Polymers, propylene / butene-1 random copolymers, propylene / ethylene / butene-1 random terpolymers, propylene-based resins such as propylene / ethylene block copolymers; polyethylene terephthalate, polybutylene terephthalate, etc. Saturated polyester resin A polyvinyl chloride resin and the like can be mentioned.

In the pallet 1 of the present invention, it is essential that the expansion ratio of the foam 2 is 7 times or more. If the expansion ratio is less than 7 times, the lightness of the pallet 1 is impaired. The expansion ratio of the foam 2 is preferably 10 to 50 times, particularly preferably. ． ． ~. ． ． Double. The foam 2 preferably has a thickness of 10 to 100 mm. As the foam 2, those obtained by a known extrusion foaming method, in-mold molding method of pre-foamed particles or the like can be used.

The reinforcing material layers 5 and 6 provided on both front and back surfaces of the foam body 2 can be provided by laminating a sheet-shaped or plate-shaped reinforcement material on the foam body 2 by a method such as adhesion or heat fusion. Such a reinforcing material may be one made of a single material, a plurality of sheets and / or plates made of the same material, or a plurality of sheets and / or sheets made of different materials. It may be a laminate of plate materials.

The leg mounting recesses in the reinforcing material layer 6 provided on the back surface side of the foam 2 can be formed by subjecting the above sheet-shaped or plate-shaped reinforcing material to a hollowing process or the like. As shown, stack a reinforcement 6a having a through hole having the shape of the end of the leg at the leg attachment position and a reinforcement 6b having no through hole at the leg attachment position. It is possible to form the concave portion by this method, as compared with the hollowing process or the like. Either or both of the reinforcing materials 6a and 6b may be a laminated body. Further, the reinforcing member 6b need not have a through hole at the leg mounting position, and may have a through hole in other portions.

As the reinforcing material, a non-foamed sheet or the like made of the same synthetic resin as the base material of the foamed body 2, various papers such as cardboard, or a laminated body of these can be used. The reinforcing material forming the reinforcing layer 5 on the surface side of the foam 2 may be a synthetic resin foam sheet, or a laminated body of a synthetic resin foam sheet and a non-foamed sheet of the above synthetic resin, paper, or the like. Further, when the reinforcing material layer 6 on the back surface side is made of a laminated material as shown in FIG. 2, a foamed sheet can be used as the reinforcing material 6a for providing the through holes having the end shape of the leg portion 3. As the reinforcing material 6b having no through hole at the leg portion, a non-foamed material such as a synthetic resin sheet or paper is used, or when a foamed sheet is used, it is preferable to use a foamed sheet having a foaming ratio of 7 to 30 times. .

The thickness of the reinforcing material layer 5 on the front surface side is preferably about 0.1 to 5 mm, and the thickness of the reinforcing material layer 6 on the back surface side is preferably about 0.3 to 15 mm.

In order to improve the lightness of the pallet 1, the legs 3 are preferably hollow, at least one end is open-ended or both ends are open-ended, as shown in FIG. As described above, a tubular member having both ends opened is preferable from the viewpoint of light weight. Further, the outer shape of the leg portion 3 is preferably a columnar shape or a cylindrical shape so that the tip of the fork of the forklift is unlikely to be caught.

The shape of the leg mounting concave portion is formed in the outer shape of the mounting side end portion of the leg portion 3. In the example shown in FIG. 2, a circular concave portion having a diameter matching the outer shape of the tubular leg portion is formed. Although formed, it may be an annular recess matching the inner and outer shapes of the leg 3.

As the material of the leg portion 3, synthetic resin, paper, or the like is used. In the case of a tubular leg portion as shown in FIG. 2, for example, a paper tube obtained by winding laminated paper in a tubular shape, a synthetic resin tube, or Foam synthetic resin tube or the like can be used. The distance between the legs 3 provided on the pallet 1 is appropriately selected according to the strength of the deck board, the purpose of use of the pallet, etc. Normally, the distance between the legs 3 is preferably about 20 to 80 mm.

In addition, when joining the open end of the tubular leg 3 having at least one end open or both ends open to the deck board 2, the tubular leg 3 is used as an example in FIG. As shown, it is also possible to insert the joining auxiliary material 7 into the inner space of the leg portion 3 as necessary and join the leg portion 3 to the deck board 2 together with the joining auxiliary material 7. When joining together the auxiliary material 7, the end portion of the leg portion 3 and the reinforcing material layer 6 are joined together, and the joining auxiliary material 7 and the inside of the leg portion 3 and the auxiliary material 7 are joined together. Bonding can be performed between the reinforcing material layer 6 and the reinforcing material layer 6, and as a result, the bonding strength of the legs can be further increased. When the joining auxiliary material 7 is used in combination, both ends of the joining auxiliary material 7 and the leg portion 3 as shown in FIG. It is preferable to use a tubular leg portion 3 that is open.

As the joining auxiliary material 7, the same materials as those exemplified in the above description of the reinforcing material are used. It is preferable that the joining auxiliary member 7 is thicker because the joining area with the leg portion 3 becomes wider and the joining force is enhanced, but even if it is made thicker than necessary, the corresponding improvement in joining force cannot be expected. Depending on the material of the auxiliary material 7, the weight of the pallet 1 may be increased or the material cost may be increased, so that the thickness of the auxiliary material 7 is preferably about 1 to 15 mm.

The leg portion 3 and the deck board 2 can be joined by heat fusion or adhesion when the leg portion 3 and the reinforcing material layer 6 are made of a synthetic resin or the like of the same quality. Join by. As the adhesive, a hot-melt adhesive, a polymer emulsion adhesive, a two-component mixed adhesive, a cross-linking adhesive, or the like is used depending on the material of the leg portion 3 and the reinforcing layer 6 and the like. The one with excellent power is appropriately selected and used.

FIG. 4 shows another embodiment of the pallet of the present invention. In the pallet 1 shown in FIG. 4, the leg portion mounting recess is not provided in the reinforcing material layer 6 on the back surface side. In this case, in order to increase the joining strength of the leg portion 3, it is necessary to use a tubular leg portion 3 with one end open or a tubular shape with both ends open, and jointly use the joining auxiliary material 7. .

A specific example of manufacturing the pallet 1 of the present invention is shown below. Production Example 1 A 1 mm thick cardboard was adhered to the surface side of a polystyrene extruded foam having a thickness of 25 mm, a length of 900 mm and a width of 900 mm (expansion ratio of 33 times) with a polymer emulsion adhesive to form a reinforcement layer on the surface side. Formed. On the other hand, circular through holes with a diameter of 90 mm were provided at a total of 9 points at a distance of 390 mm (center-to-center distance) in both length and width, and a 1 mm thick cardboard and a 0.5 mm thick cardboard without through holes. Laminate the sheet with the legs attached to form the recessed part, and attach it to the backside of the foam with a polymer emulsion adhesive so that the side without the recess faces the foam side. A reinforcement layer was formed on the side to make a deck board. Then, the end of the leg portion having a length of 100 mm and formed of a paper tube having a thickness of 10 mm (outer diameter 90 mm) was fitted into the leg portion mounting recess of the reinforcing material layer on the back side of the deck board, and the polymer was attached. A pallet was adhered with an emulsion adhesive.

Production Example 2 A similar reinforcing material layer was formed on the front surface side of a foam similar to that described above, and cardboard having a thickness of 1 mm was laminated on the back surface side to obtain a deck board. To the surface of the reinforcing material layer on the back side of this deck board, the leg portions similar to those in Production Example 1 were adhered with a polymer emulsion adhesive at an interval of 390 mm (center-to-center distance) in both length and width. Then, a bonding auxiliary material made of a polystyrene extruded foam sheet having a thickness of 8 mm (thickness: 8 mm, foaming ratio: 15 times), which can be fitted into the inside of the leg, was fitted into the inside of the leg, and the same method as used for bonding the leg The adhesive was used to bond the joining auxiliary material and the reinforcing material layers on the inside of the legs and on the back side of the deck board to form a pallet.

[0028]

[Effect of device]

 As described above, in the pallet of the present invention, a reinforcing material layer is laminated on both front and back surfaces of a foam having a foaming ratio of 7 times or more to form a deck board, and the reinforcing material layer on the back side of the deck board is formed with legs. Since the deck and the foam that make up the deck board have a high foaming ratio, the strength of the joint between the legs and the deck board is excellent, and the lightweight and robustness is excellent. In addition, by providing a non-penetrating leg mounting recess having the shape of the end of the leg on the back side, and inserting the leg end into the recess and joining the legs, Further, the joint strength of the legs is increased. The leg mounting recess can be efficiently formed by stacking a reinforcing material having a through hole having the shape of the end of the leg and a reinforcing material having no through hole in the leg mounting portion. .

The pallet of the present invention is preferably lightweight because it uses a hollow leg, a tubular end with one end open, or a tubular end with both ends open. Also, when using a tubular leg with one end open or a tubular leg with both ends open, and when joining the end on the opening side to the deck board, insert a joining auxiliary material into the inner space of the leg, and When the legs are joined together with the joining aid, the joining strength of the legs is further enhanced.

[Submission date] June 10, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

In the pallet 1 of the present invention, it is essential that the expansion ratio of the foam 2 is 7 times or more. If the expansion ratio is less than 7 times, the lightness of the pallet 1 is impaired. The foaming ratio of the foam 2 is preferably 10 to 50 times. The foam 2 preferably has a thickness of 10 to 100 mm. As the foamed body 2, one obtained by a known extrusion foaming method, an in-mold molding method of pre-foamed particles, or the like can be used.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction content]

As the material of the leg portion 3, synthetic resin, paper, or the like is used. In the case of a tubular leg portion as shown in FIG. 2, for example, a paper tube obtained by winding laminated paper in a tubular shape, a synthetic resin tube, or Foam synthetic resin tube or the like can be used. The distance between the legs 3 provided on the pallet 1 is appropriately selected according to the strength of the deck board, the purpose of use of the pallet, etc., but normally the distance between the legs 3 is preferably about 20 to 80 cm .

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a pallet of the present invention.

FIG. 2 is a vertical sectional view taken along the line II-II in FIG.

FIG. 3 is a rear view of the pallet of the present invention.

FIG. 4 is a vertical sectional view showing another embodiment of the pallet of the present invention.

[Explanation of symbols]

 1 Pallet 2 Deck Board 3 Leg 4 Synthetic Resin Foam 5, 6 Reinforcement Layer 6a Reinforcing Material with Through Hole 6b Reinforcing Material without Through Hole 7 Joining Assist Material

Claims (6)

[Scope of utility model registration request] 1. A deck board in which a reinforcing material layer is provided on both surfaces of a synthetic resin foam plate having a foaming ratio of 7 times or more, and a deck material on the back surface of the deck board, which is joined and integrated by adhesion or heat fusion, A pallet characterized by comprising a plurality of legs. 2. The reinforcing material layer provided on the back side of the deck board is provided with a non-penetrating leg portion mounting recess having the shape of the leg end, and the leg end is inserted into the recess, and the leg is inserted. The pallet according to claim 1, wherein the deck board and the deck board are joined and integrated. 3. The back surface of the deck board by stacking a reinforcing material having a through hole having a shape of an end portion of the leg at a mounting position of the leg portion and a reinforcing material having no through hole at the mounting portion of the leg portion. The pallet according to claim 2, wherein a non-penetrating leg portion mounting recess is formed in the side reinforcing material layer. 4. The pallet according to claim 1, wherein the legs are hollow. 5. The legs are formed in a tubular shape with at least one end open or a tubular shape with both ends open.
Pallet described in any of. 6. The deck board and the legs are integrated by inserting a joining auxiliary material into the inner space of the leg and joining the opening side of the leg to the back surface of the deck board together with the joining auxiliary material. The pallet according to claim 5.