JP2018103997A - Pallet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pallet that is light weight, easy to handle, excellent in waterproof, movable by hand, and capable of enhancing safety and work efficiency of a carrying operation.SOLUTION: A pallet includes a pallet body 2 including a foamed resin material, and a caster unit 4 with a caster wheel 3. The pallet body 2 includes a placing surface S1 on which baggage is mounted, and a bottom surface S2 on an opposite side thereof. A recess portion 5 is formed on the bottom surface S2 and the caster unit 4 is detachably mounted on the recess portion 5.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a pallet used for storing and transporting luggage (particularly fruits such as strawberries and peaches).

  Conventionally, a resin pallet (for example, refer to Patent Document 1) or a paper pallet (for example, refer to Patent Document 2) is applied in addition to a wooden pallet for the storage and transport of cargo using a cargo handling vehicle. ing.

  However, a wooden or resin pallet has a heavy weight of 10 kg and is not easy to handle. Moreover, since wooden or resin pallets have poor cushioning properties, when used for transporting delicate fruits such as strawberries and peaches, the surface of the fruits may be damaged by the impact of transport. Also, since the paper pallet has poor water resistance, when the fruit is stored in a low temperature warehouse while being placed on the paper pallet, the strength is remarkably reduced due to condensation, and there is a risk of destruction due to load.

  On the other hand, when a pallet loaded with luggage is transported in a warehouse (including a factory) or the like, it is usually performed using a cargo handling vehicle such as a forklift. However, when a cargo handling vehicle is used, a sufficient space for traveling is required, and there is a risk of contact with a person or a stored luggage during traveling. In addition, the forklift waiting time is wasted. Therefore, depending on the type of luggage, it is desirable that it can be easily moved and transported manually without using a cargo handling vehicle.

JP, 2015-101341, A Japanese Patent Laid-Open No. 07-187188

  The present invention has been devised in view of the actual situation as described above, is lightweight and easy to handle, has excellent cushioning properties, is excellent in water resistance, can be moved manually, and can be transported safely and easily. Its main purpose is to provide a pallet that can increase efficiency.

The present invention is a pallet,
Including a pallet body made of foamed resin material and a caster unit having caster wheels,
The pallet body includes a placement surface for placing a load and a bottom surface on the opposite side.
A concave portion is formed on the bottom surface,
The caster unit is detachably attached to the recess.

In the pallet according to the present invention, the caster unit includes a base plate and a caster wheel rotatably supported by the base plate,
The base plate is preferably mounted in the recess.

In the pallet according to the present invention, it is preferable that the base plate is press-fitted into the recess.

  In the pallet according to the present invention, the base plate can be formed from a plate material having higher bending rigidity than the pallet body, or can be formed from a foamed resin material.

  In the pallet according to the present invention, it is preferable that a retaining member for preventing the caster unit from dropping from the pallet body is further provided.

In the pallet according to the present invention, the retaining member is detachably attached to the recess from the bottom side of the pallet body,
The retaining member is preferably a ring-shaped body that has an opening that exposes the caster wheel and that sandwiches the outer periphery of the base plate with the bottom of the recess.

  In the pallet according to the present invention, it is preferable that a retaining protrusion for holding the retaining member is provided on an inner surface of the recess.

In the pallet according to the present invention, the base plate has a rectangular plate shape having first and second sides parallel to each other and third and fourth sides orthogonal to the first and second sides,
The concave portion includes first and second inner side surfaces that contact the first and second sides, a third inner side surface that contacts the third side, and a fourth inner side that is spaced from the fourth side by a distance D. It is desirable to have side surfaces.

In the pallet according to the present invention, a retaining protrusion for holding the retaining member is formed on the third and fourth inner surfaces of the recess,
On the outer surface of the retaining member, there are provided engaging protrusions that engage with the retaining protrusions, and one engaging protrusion has a protrusion for preventing rattling that is inserted into the gap D. It is desirable to

  The pallet of the present invention includes a pallet body made of a foamed resin material. Therefore, the weight can be reduced and the handling becomes easy. In addition, since the total weight including the loaded cargo is reduced, the transportation cost especially during air transportation is greatly reduced.

  Even when the surface of the pallet is wetted by condensation, the strength of the pallet is maintained by the excellent water resistance of the foamed resin. Furthermore, the cushioning property of the foamed resin as the material of the pallet makes it possible to protect the delicate luggage from the impact caused by the conveyance. Furthermore, the excellent heat insulation property of the foamed resin makes it possible to store the luggage in a heat-insulated state. Thereby, even when a baggage such as fruit is transported and stored in a high-temperature area, the deterioration of the baggage is suppressed, and the merchantability is maintained high.

  Moreover, the pallet of the present invention includes a caster unit that is detachably attached to the pallet body. Therefore, it can be easily transported manually without using a cargo handling vehicle. for that reason. Space for the cargo handling vehicle to travel is not required. In addition, there is no possibility of coming into contact with luggage or people being stored during traveling, and there is no need to wait for a cargo handling vehicle. Accordingly, safety can be improved, workability can be improved, and work can be shortened. Since the caster unit is detachable, it can be used as a normal pallet when the caster unit is removed.

It is a bottom view which shows the pallet of 1st Embodiment of this invention. (A), (b) is the AA sectional view taken on the line of FIG. 1, and the BB sectional drawing. It is a bottom view which shows the principal part of the pallet of FIG. (A) is the disassembled perspective view which looked at the principal part of the other example of the pallet of 1st Embodiment from the bottom face side, (b) is the bottom view of the said principal part. (A) is the disassembled perspective view which looked at the principal part of the pallet of 2nd Embodiment from the bottom face side, (b) is the bottom view of the said principal part. It is a perspective view which shows the recessed part of the pallet of FIG. FIG. 6 is an exploded cross-sectional view of a main part of the pallet in FIG. 5. It is sectional drawing of the principal part of the pallet of FIG. (A), (b) is the perspective view which shows the other example of the caster unit 4, and its disassembled perspective view. It is a perspective view which shows the integrally molded product for baseplates.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a bottom view showing an example of a pallet according to a first embodiment of the present invention, and FIGS. 2A and 2B are cross-sectional views taken along lines AA and BB in FIG. It is. In order to clarify the structure of the pallet, in FIGS. 1 to 9, the pallet is drawn upside down.

  1-2 (a) and (b), the pallet 1 includes a pallet body 2 made of a foamed resin material and a caster unit 4 including a caster wheel 3.

  Although it does not restrict | limit especially as a foamed resin material, a foamed polystyrene, a foamed polyethylene, a foamed polypropylene, etc. can be employ | adopted suitably. Moreover, in order to ensure high chip resistance, the foamed resin material is preferably a low foaming material having a foaming ratio of, for example, 30 to 40 times.

  The pallet body 2 includes a placement surface S1 for placing a load and a bottom surface S2 on the opposite side, and a plurality of recesses 5 are formed on the bottom surface S2.

  Specifically, the pallet body 2 of the present example includes a base 6 having a rectangular plate shape with the upper surface (lower surface in FIG. 2) as the mounting surface S1, and a lower surface of the base 6 (upper in FIG. 2). And a reinforcing frame portion 8 composed of ribs 7 protruding from the surface. In this example, the reinforcing frame portion 8 is formed in a lattice frame shape by a plurality of vertical and horizontal ribs 7 extending in parallel with the side surface of the base portion 6. In FIGS. 1, 3, 4 (b) and 5 (b), a dot pattern is added to the bottom surface S2 for easy understanding.

  The bottom surface S2 is formed by the lower surface of the rib 7. Further, the concave portion 5 is formed in a rectangular shape between the ribs 7. On the lower surface of the rib 7 of this example, a recess 9 is arranged to enhance the air permeability of the pallet 1 by conducting between the recesses 5. The recess 9 can also be used for inserting the binding band. In this case, the recess 9 is arranged in a straight line in the vertical and horizontal directions.

  Next, the caster unit 4 is detachably attached to the recess 5. The caster unit 4 of this example includes a base plate 10 and caster wheels 3 that are rotatably supported by the base plate 10. As the caster wheel 3, various types having a well-known structure can be used. In this example, the caster wheel 3 is attached by screwing a wheel holder mounting seat 3A (shown in FIGS. 1 and 3) to the base plate 10.

  The base plate 10 of this example is made of, for example, a non-foamed synthetic resin material, a wood material, a metal material, or the like, and has a higher bending rigidity than the pallet body 2. Thereby, the caster wheel 3 is firmly fixed. Further, the base plate 10 having a high bending rigidity can reinforce the pallet body 2 and increase the strength of the pallet 1 by being mounted in the recess 5. In this example, a case where the base plate 10 has a rectangular plate shape is shown. As will be described later, the base plate 10 can also be formed of a foamed resin material.

  In the pallet 1 of the first embodiment, the caster unit 4 is attached by fitting the base plate 10 into the recess 5. On the other hand, in the pallet 1 of the second embodiment, the base plate 10 is loosely fitted in the recess 5, and the caster unit 4 is attached by a retaining member 12 fitted in the recess 5.

  Below, it demonstrates in order from 1st Embodiment. In this example, since the concave portion 5 is formed in a horizontally long rectangular shape, three of the four sides of the base plate 10 are press-fitted and fitted to the inner side surface of the concave portion 5.

  However, as shown in FIGS. 4A and 4B, the base plate 10 and the recess 5 are formed in substantially the same shape, and all four sides of the base plate 10 are pressed against the inner surface of the recess 5, The base plate 10 can also be fitted. In this case, it is possible to further prevent the caster unit 4 from dropping from the pallet body 2 as compared with the fitting on the three sides.

  The pallet main body 2 can be elastically deformed to the compression side by being made of a foamed resin material, and thus can be repeatedly fitted / removed.

  In order to prevent the pallet body 2 from falling off, a retaining member 12 (shown by a one-dot chain line in FIG. 4A) can be further provided. The retaining member 12 is detachably attached to the recess 5 from the bottom surface S2 side of the pallet body 2. In this example, the retaining member 12 is attached by being press-fitted (fitted) into the recess 5.

  The retaining member 12 is a ring-shaped body provided with an opening 12A for exposing the caster wheel 3 in the center. The caster unit 4 is prevented from falling off by sandwiching the outer peripheral portion of the base plate 10 between the retaining member 12 and the bottom 5S of the recess 5. The retaining member 12 is preferably formed of the same foamed resin material as that of the pallet main body 2, thereby increasing the frictional force with the inner surface of the recess 5 and making it more difficult to come off.

Next, the pallet 1 of 2nd Embodiment is shown by FIGS.
As shown in FIGS. 5A and 5B, in the second embodiment, the base plate 10 of the caster unit 4 is loosely inserted into the recess 5, and is detached from the pallet body 2 by the retaining member 12. Is prevented.

  The base plate 10 has a rectangular plate shape having first and second sides E1 and E2 that are parallel to each other, and third and fourth sides E3 and E4 that are orthogonal to the first and second sides. The recess 5 separates the first to third inner side surfaces W1 to W3 contacting the first to third sides E1 to E3 and the fourth side E4 with a distance D (shown in FIGS. 7 and 8). A fourth inner surface W4 is provided.

  As shown in FIG. 6, a retaining member 12 is provided on the inner peripheral surface of the recess 5, in this example, the third and fourth inner side surfaces W <b> 3 and W <b> 4 (collectively referred to as “inner side surface W”). A retaining projection 23 for holding is formed. For convenience, the direction in which the inner side surfaces W3 and W4 face each other may be referred to as the X direction, the width direction of the inner side surfaces W3 and W4 may be referred to as the Y direction, and the depth direction of the recess 5 may be referred to as the Z direction.

The retaining protrusion 23 is formed on the center side in the width direction (Y direction) of the inner surface W. Retaining projection 23 extends in the X direction from the inner surface W, has a locking surface 23S _A facing the bottom 5S of the recess 5, and a chamfered 23S _B which is inclined toward the bottom 5S from the bottom surface S2. The addition pallet body 2, slits 24 extending in the Z direction from the mounting surface S1 to the locking surface 23S _A is formed. The slit hole 24 is electrically connected to the recess 5 and functions as a vent hole. The slit hole 24 is useful for simplifying the mold structure for forming the retaining protrusion 23. Slit 24 in this example has the locking surface 23S width L1 in the same X direction as _A, and the Y direction of the length L2.

  As shown in FIG. 7, the length L3 in the X direction of the base plate 10 is smaller than the distance L4 between the inner side surfaces W3 and W4, whereby the distance between the fourth side E4 and the fourth inner side surface W4 is reached. A space D is formed. In this example, the distance D is substantially equal to the protrusion height L5 of the retaining protrusion 23 from the fourth inner surface W4. As a result, the base plate 10 can be dropped into the recess 5 without damaging the retaining protrusion 23.

The retaining member 12 includes an engaging protrusion 25 that engages with each retaining protrusion 23 on the outer surfaces K3 and K4 facing the third and fourth inner surfaces W3 and W4. The engaging projection 25 comprises the locking surface 23S _A and meshing with the engagement surface 25S _A, and said chamfer 23S _B and the chamfered 25S _B of the same slope.

Since the retaining member 12 has a rectangular frame shape having an opening 12A, its side wall can be elastically deformed. Therefore, it is possible to get over the retaining protrusion 23 and insert into the recess 5. Further, the elastic deformation enables the removal. The chamfers 23S _B and 25S _B facilitate the insertion of the retaining member 12 into the recess 5.

  The retaining member 12 of the present example includes a convex portion 26 inserted into the gap D on one engagement protrusion 25. The convex portion 26 can prevent the base plate 10 from rattling in the X direction.

  9A and 9B show another example of a caster unit 4 that can be suitably used for the pallet 1 of the first embodiment (fitting). In the caster unit 4 of this example, the base plate 10 that supports the caster wheel 3 is formed of a foamed resin material. As the foamed resin material, the same kind as that of the pallet main body 2 can be suitably used. However, in order to ensure high strength, it is preferable to set the expansion ratio, for example, 20 to 30 times lower than the pallet body 2.

  The base plate 10 of this example includes a main plate portion 10A and a sub plate portion 10B that are divided into two by a dividing surface 30.

  The main plate portion 10 </ b> A includes a slit-like insertion groove 31 for inserting and holding the mounting seat 3 </ b> A of the caster wheel 3, and a U-shaped cutout portion 32 through which the wheel holder 3 </ b> B of the caster wheel 3 passes.

  The insertion groove 31 extends in parallel with the lower surface 10S (upper surface in FIG. 9) of the main plate portion 10A from the opening portion 31A opened at the dividing surface 30. The rear end of the insertion groove 31 terminates inside the main plate portion 10A. The notch 32 opens at the lower surface 10 </ b> S and extends to the insertion groove 31.

  In addition, the dividing surface 30 of the main plate portion 10A and the dividing surface 30 of the sub plate portion 10B are provided with engaging means 33 that can be engaged with each other and connected to each other. The engaging means 33 of this example includes, for example, a pin-shaped engaging convex portion 33A formed on one divided surface 30 and an engagement formed on the other divided surface 30 so that the engaging convex portion 33A can be inserted. It is comprised from the recessed part 33B. In addition, in the base plate 10, it is also preferable to adhere | attach between the division surfaces 30 and 30 using an adhesive agent, in order to raise the joining strength of 10 A of said main plate parts, and the subplate part 10B.

  As shown in FIG. 10, the main plate portion 10A and the sub plate portion 10B are connected to each other by, for example, a thin rib-like portion 35 such as the lower surface 10S of the main plate portion 10A and the lower surface 10S of the sub plate portion 10B. It is preferable to form it as a single-piece molded product. In this case, it is possible to improve the storage management of the parts by dividing the integrally molded product by the rib-shaped portion 35 at the assembly work site. Moreover, production efficiency and production cost can be reduced.

  As described above, when the base plate 10 is formed of a foamed resin material, the frictional force with the concave portion 5 is increased, so that the attachment strength by fitting can be ensured high. Note that the caster unit 4 in which the base plate 10 is formed of a foamed resin material can also be employed in the pallet 1 of the second embodiment.

  As mentioned above, although the tire of one embodiment of the present invention was explained in detail, the present invention is not limited to the above-mentioned specific embodiment, and can be carried out by changing to various modes.

DESCRIPTION OF SYMBOLS 1 Pallet 2 Pallet main body 3 Caster wheel 4 Caster unit 5 Recessed part 5S Bottom 10 Base plate 12 Retaining member 12A Opening part 23 Retaining protrusion 25 Engaging protrusion 26 Convex part E1-E4 1st-4th edge W1-W4 1st To fourth inner surface S1 mounting surface S2 bottom surface

Claims (10)

A pallet,
Including a pallet body made of foamed resin material and a caster unit having caster wheels,
The pallet body includes a placement surface for placing a load and a bottom surface on the opposite side.
A concave portion is formed on the bottom surface,
The caster unit is a pallet that is detachably mounted in the recess. The caster unit includes a base plate and a caster wheel rotatably supported by the base plate,
The pallet according to claim 1, wherein the base plate is mounted in the recess.   The pallet according to claim 1 or 2, wherein the base plate is press-fitted into the recess.   The pallet according to claim 2 or 3, wherein the base plate is made of a plate material having higher bending rigidity than the pallet body.   The pallet according to claim 2 or 3, wherein the base plate is made of a foamed resin material.   The pallet according to any one of claims 2 to 5, further comprising a retaining member for preventing the caster unit from falling off the pallet body. The retaining member is detachably attached to the recess from the bottom side of the pallet body,
The pallet according to claim 6, wherein the retaining member is a ring-shaped body that has an opening for exposing the caster wheel and sandwiches an outer peripheral portion of the base plate with a bottom of the recess.   The pallet according to claim 6 or 7, wherein a retaining protrusion for holding the retaining member is provided on an inner surface of the recess. The base plate has a rectangular plate shape having first and second sides parallel to each other and third and fourth sides orthogonal to the first and second sides,
The concave portion includes first and second inner side surfaces that contact the first and second sides, a third inner side surface that contacts the third side, and a fourth inner side that is spaced from the fourth side by a distance D. The pallet according to any one of claims 2 to 8, which has a side surface. A retaining protrusion for holding the retaining member is provided on the third and fourth inner surfaces of the recess,
On the outer surface of the retaining member, there are provided engaging protrusions that engage with the retaining protrusions, and one engaging protrusion has a protrusion for preventing rattling that is inserted into the gap D. The pallet according to claim 9.

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