JP6009345B2 - palette - Google Patents

Description

  The present invention relates to a pallet used for transportation of articles.

  In general, a pallet used for transporting articles and the like includes a plurality of support columns, and an upper deck and a lower deck that connect between the upper ends and the lower ends of the support columns. It has a fork insertion part into which a hand lift fork can be inserted.

  By the way, many instruments and devices (such as a carrier with a caster and a conveyor) for storing and transporting a pallet support only the outer peripheral edge portion and the outer engaging portion of the lower surface of the pallet. For example, when a pallet is placed on an instrument having a pair of support portions extending in parallel with each other, the pallet is placed so as to be placed horizontally between the pair of support portions. In this case, a large burden is easily applied to the center portion of the pallet, and in some cases, the center portion may be loosened downward.

  On the other hand, there is a pallet provided with a reinforcing structure that increases the strength of the center of the pallet (see, for example, Patent Document 1).

JP 2010-132319 A

  By the way, it is the actual condition that a pallet having a stronger central portion structure than the pallet disclosed in Patent Document 1 is required.

  The present invention has been made to solve the above-described problems and the like, and an object thereof is to provide a pallet having a stronger central portion structure.

  In the following, each means suitable for solving the above-mentioned purpose will be described in terms of items. In addition, the effect etc. peculiar to the means to respond | correspond as needed are added.

Means 1. A pallet having a substantially rectangular shape in plan view,
Four corner pillars at the four corners of the pallet;
An intermediate column provided at an intermediate point between the pair of corner columns arranged along the side of the pallet;
A central pillar provided in the center of the pallet;
An upper deck connecting between the corner pillars, the intermediate pillars, and the upper ends of the central pillars;
The corner pillar, the intermediate pillar, and a lower deck connecting between the lower ends of the central pillar,
An upper deck surface on which an article can be placed is configured by the corner column, the intermediate column, the central column, and the upper surface of the upper deck.
The corner column, the intermediate column, the central column, and the lower deck surface to be grounded to the installation surface is configured by the lower surface of the lower deck,
The central pillar is
It extends toward the lower deck surface from the upper deck surface, and the outer cylindrical portion of a substantially rectangular inner dimensions that a wider in the longitudinal direction of the pallet to correspond to the outer peripheral shape of the pallet,
A general surface that extends from the upper deck surface to the lower deck surface, is disposed on the inner peripheral side of the outer tube portion, and extends in parallel with each inner surface of the outer tube portion, and a corner portion formed by the general surfaces. An inner cylinder portion having a substantially octagonal cross section having a corner surface formed so as to bevel chamfered diagonally,
The overall height extending from the upper deck surface to the lower deck surface is connected between the boundary portion of the general surface with the corner surface and the outer cylinder portion so as to be substantially orthogonal to the general surface. Ribs are provided, and
Out of the lower surface constituting ribs constituting the lower deck on the outer circumferential side of the outer cylinder portion, the lower surface constituting ribs extending along the longitudinal direction of the pallet and connected to the outer cylinder portion are arranged on the inner circumferential side of the outer cylinder portion. A pallet, characterized in that it is formed so as to extend substantially straight and provided with connecting ribs connected to the entire height rib.

  According to the means 1, the central column has a two-layer structure of the outer cylinder part and the inner cylinder part, and the inner cylinder part has a substantially octagonal cross section, and each corner part of the inner cylinder part and the outer cylinder part Are connected substantially perpendicularly to the general surface of the inner cylinder part and the inner surfaces of the outer cylinder part over the entire range from the upper deck surface to the lower deck surface. Thereby, the intensity | strength of center pillar itself can be raised significantly.

  Further, according to this means, among the lower surface constituting ribs constituting the lower deck of the pallet, those extending along the longitudinal direction of the pallet and connected to the outer cylinder part are extended to the inner peripheral side of the outer cylinder part. Connection ribs are formed and connected to all the height ribs. Thereby, the rigidity of the site | part connected with the full height rib by the connection rib among outer cylinder parts can be improved, and the rigidity of the lower surface structure rib connected with the said site | part can also be improved as a result. Therefore, the rigidity of the pallet central part (particularly the lower part) can be further increased, and the situation where the pallet central part is deformed so as to be loosened can be more reliably prevented. In particular, the connection ribs are provided corresponding to the longitudinal direction of the pallet as in this means, so that the pallet central portion can be more effectively loosened when supported only by the outer peripheral edge (both sides) of the pallet. Can be prevented.

  Mean 2. 2. The pallet according to claim 1, further comprising a connecting rib for connecting the connecting rib and the full height rib extending substantially parallel to the connecting rib.

  According to the means 2, the rigidity of the connection rib can be increased, and the deformation or the lateral collapse of the connection rib itself can be prevented more reliably.

  Means 3. Out of the lower surface constituting ribs constituting the lower deck on the outer circumferential side of the outer cylinder portion, the lower surface constituting ribs extending along the short direction of the pallet and connected to the outer cylinder portion are arranged on the inner circumferential side of the outer cylinder portion. The pallet according to claim 1 or 2, further comprising connecting ribs that are formed so as to extend substantially straight to each other and that are connected to the entire height ribs.

  According to the means 3, the connection ribs are provided not only in the longitudinal direction of the pallet but also in the short direction, so that the pallet central portion when supported only by the outer peripheral edge (both sides) of the pallet is provided. It is possible to prevent the slack more reliably.

  It should be noted that “the connecting ribs connecting the (first) connecting ribs extending along the longitudinal direction of the pallet and the (first) full height ribs extending along the longitudinal direction of the pallet are along the short direction of the pallet. It may be used as a part of the (second) connecting rib extending. In this case, the strength can be increased by effectively connecting the ribs without increasing the number of ribs as much as possible. Therefore, it is possible to avoid a situation in which the mold for molding the space surrounded by the ribs of the pallet becomes too small and the mold is easily damaged.

  In addition, among the upper surface constituting ribs constituting the upper deck on the outer peripheral side of the outer cylinder portion, the upper surface constituting ribs extending along the longitudinal direction of the pallet and connected to the outer cylinder portion are provided inside the outer cylinder portion. It may be provided with a connecting rib formed so as to extend substantially straight on the peripheral side and connected to the entire height rib. In this case, connecting ribs are provided not only on the lower deck side of the pallet but also on the upper deck side, so that loosening of the pallet central part when supported only by the outer peripheral edge (both sides) of the pallet can be ensured Can be prevented.

  Means 4. The pallet according to any one of means 1 to 3, wherein the thickness of the lower deck is thinner than the thickness of the upper deck.

  When the pallet is of a type in which the thickness of the lower deck is thinner than that of the upper deck as in the means 4, the lower part is a part where the lower part is likely to be deformed particularly in the central part of the pallet. Therefore, by applying the above-described reinforcing structure such as the connecting rib to the lower part of the pallet central part, the effect of preventing the deformation of the pallet central part is more reliably achieved.

It is the perspective view which looked at the pallet from the upper surface side. It is the perspective view which looked at the pallet from the lower surface side. It is a fragmentary perspective view including the partial cross section which shows the center part of the pallet seen from the upper surface side. It is a fragmentary perspective view including the partial cross section which shows the center part of the pallet seen from the lower surface side. It is a top view of the pallet center part containing the cross section of a center pillar. FIG. 6 is a perspective view of FIG. 5. It is a fragmentary perspective view including the partial cross section which shows the center part of the pallet seen from the upper surface side. It is a fragmentary perspective view including the partial cross section which shows the center part of the pallet seen from the lower surface side.

  Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIGS. 1 and 2, the pallet 1 has a substantially rectangular shape in plan view. The pallet 1 includes four corner pillars 2 provided at the four corners of the pallet 1, an intermediate pillar 3 provided at an intermediate point between the pair of corner pillars 2 arranged along the side of the pallet 1, The central column 4 provided in the central portion, the corner column 2, the intermediate column 3, and the upper deck 5 connecting the upper ends of the central column 4, the corner column 2, the intermediate column 3, and the lower end of the central column 4 The lower deck 6 which connects between parts is provided. In addition, a fork insertion portion 8 into which a fork of a handlift (not shown) can be inserted is formed between each corner column 2 and the intermediate column 3.

  The upper deck 5 is an upper connection that straightly connects between the upper ends of the corner pillar 2, the intermediate pillar 3, and the central pillar 4 that are arranged along the longitudinal direction or the lateral direction of the pallet 1. A crosspiece 11 and an upper auxiliary crosspiece 12 that connects the four upper connection bars 11 so as to cover an area surrounded by the upper connection bars 11 are provided. Further, the lower deck 6 is a lower deck that straightly connects the lower ends of the corner pillars 2, the intermediate pillars 3 and the central pillar 4 that are aligned with each other along the longitudinal direction or the short direction of the pallet 1. A connecting bar 13 and a lower auxiliary bar 14 for connecting the lower connecting bars 13 on the four sides so as to cover an area surrounded by the lower connecting bars 13 are provided.

  In the present embodiment, an “upper deck surface 15” on which an article can be placed is constituted by the corner pillar 2, the intermediate pillar 3, the central pillar 4, and the upper surface of the upper deck 5. Further, a “lower deck surface 16” that contacts the installation surface such as a floor surface is formed by the corner pillar 2, the intermediate pillar 3, the central pillar 4, and the lower surface of the lower deck 6. In addition, the pallet 1 of this embodiment is integrally injection-molded with polypropylene.

  In addition, the upper deck 5 on which the article is placed is made more robust, and the lower deck 6 on which the wheel of the handlift gets over when the handlift fork is inserted into the fork insertion portion 8 is lifted up. In order to facilitate, the thickness of the lower deck 6 is made thinner than the thickness of the upper deck 5 (see FIGS. 3 and 4).

  Now, as shown in FIGS. 5 to 8, the central column 4 of the present embodiment includes an outer cylinder part 21 and an inner cylinder part 22 arranged on the inner peripheral side of the outer cylinder part 21. The outer cylinder portion 21 has a substantially rectangular cross section (substantially similar to the outer shape of the pallet 1) corresponding to the outer peripheral shape of the pallet 1, and the inner dimension is increased in the longitudinal direction of the pallet 1. Moreover, the inner cylinder part 22 is opposed to each inner surface of the outer cylinder part 21, and a general surface 23 extending in parallel with each inner surface of the opposed outer cylinder part 21 and a corner part formed by the general surfaces 23 are slanted. And a corner surface 24 formed so as to be chamfered, and has a substantially octagonal cross section.

  In addition, the boundary between the general surface 23 and the corner surface 24 (eight corners of the inner cylindrical portion 22) and the outer cylindrical portion 21 are connected to each other in a straight line substantially perpendicular to the general surface 23, and Full height ribs 26 extending from the deck surface 15 to the lower deck surface 16 are provided (see FIGS. 6 and 7). Hereinafter, for convenience, the full height ribs 26 extending along the longitudinal direction of the pallet 1 are also referred to as “first full height ribs 27”, and the full height ribs 26 extending along the short direction of the pallet 1 are also referred to as “second full height ribs 28”. I will do it.

  Furthermore, in this embodiment, as shown in FIGS. 5, 6, and the like, among the lower surface constituting ribs 31 constituting the lower deck surface 16 (the lower connecting beam 13 of the lower deck 6) on the outer peripheral side of the outer cylinder portion 21, The one extending along the longitudinal direction of the pallet 1 and connected to the outer cylinder part 21 is formed so as to extend almost straight toward the inner peripheral side of the outer cylinder part 21, and the inner cylinder part 22 or A first reinforcing rib 32 and a first connecting rib 33 that are connected to the second full height rib 28 are provided. Of the lower surface constituting ribs 31, those extending along the longitudinal direction of the pallet 1 and connected to the outer cylinder portion 21 should have the first reinforcing ribs 32 corresponding to the lower surface constituting ribs 31. In some cases, the first full height rib 27 extends at a position. In this case, the first full height rib 27 also serves as the first reinforcing rib 32.

  In addition, a connecting rib 34 that connects the first connecting rib 33 and the first full height rib 27 that extends in parallel to face the first connecting rib 33 is provided. In this embodiment, in addition to the connecting rib 34, the lower side portions of the first connecting rib 33 and the first full height rib 27 and the lower side portions of the first reinforcing ribs 32 adjacent to each other are connected. In addition, a load bearing wall 35 is provided, and an opening is formed in the load bearing wall 35 in order to improve weight reduction, resource saving, drainage, and the like.

  Further, of the lower surface constituting ribs 31 constituting the lower deck surface 16 (the lower connecting beam 13 of the lower deck 6) on the outer peripheral side of the outer cylinder portion 21, the outer cylinder portion extends along the short direction of the pallet 1. The second reinforcing rib 37 connected to the inner cylindrical portion 22 or the first full height rib 27, and the second reinforcing rib 37 formed so as to extend substantially straight to the inner peripheral side of the outer cylindrical portion 21; Two connecting ribs 38 are provided. In the present embodiment, the second connection rib 38 extends in a direction orthogonal to the first connection rib 33, and a part of the second connection rib 38 is constituted by the connection rib 34. In other words, the first connection rib 33 is also a connection rib that connects between the second connection rib 38 and the second full height rib 28 that extends in parallel to the second connection rib 38.

  The first connection rib 33 and the second connection rib 38 are basically configured at the same height as the lower surface constituting rib 31, but in the present embodiment, the first connection rib 33 among the second connection ribs 38. A portion on the opposite side of the portion configured as the connecting rib 34 across the surface extends from the upper deck surface 15 to the lower deck surface 16.

  Further, in the present embodiment, as shown in FIGS. 7 and 8, the upper deck surface 15 (the upper connecting beam 11 of the upper deck 5) is also formed on the outer peripheral side of the outer cylinder portion 21 on the upper deck surface 15 side. Of the upper surface constituting ribs 41, the one extending along the longitudinal direction of the pallet 1 and connected to the outer cylinder part 21 is formed so as to extend almost straight to the inner peripheral side of the outer cylinder part 21, and the inner cylinder The upper first reinforcing rib 42 and the upper connecting rib 43 that are connected to the portion 22 or the second full height rib 28 are provided. Further, of the upper surface constituting ribs 41 constituting the upper deck surface 15 (the upper connecting bar 11 of the upper deck 5) on the outer peripheral side of the outer cylinder portion 21, the outer cylinder portion extends along the short direction of the pallet 1. An upper second reinforcing rib 44 connected to the inner cylinder portion 22 is provided so as to extend the one connected to the inner cylinder 21 substantially straight to the inner peripheral side of the outer cylinder portion 21.

  As shown in FIG. 7 and the like, for the convenience of forming the pallet 1, the first connection rib 33 is formed at a position that does not overlap the upper connection rib 43, and the first reinforcement rib 32 is the upper first reinforcement. It is formed at a position that does not overlap the rib 42 in the vertical direction.

  As described in detail above, according to the present embodiment, the central column 4 has a two-layer structure of the outer tube portion 21 and the inner tube portion 22, and the inner tube portion 22 has a substantially octagonal cross section. The general surface 23 and the outer cylinder of the inner cylinder portion 22 are formed between the corners of the inner cylinder portion 22 and the outer cylinder portion 21 over the entire range from the upper deck surface 15 to the lower deck surface 16 by the total height ribs 26. It is connected to each inner surface of the part 21 substantially perpendicularly. Thereby, the intensity | strength of center pillar 4 itself can be raised significantly.

  Further, according to the present embodiment, the lower surface constituting rib 31 constituting the lower deck 6 (lower deck surface 16) of the pallet 1 extends along the longitudinal direction of the pallet 1 and is connected to the outer cylinder portion 21. The first connecting rib 33 is formed so as to extend toward the inner peripheral side of the outer cylinder portion 21 and is connected to the second full height rib 28. Thereby, the rigidity of the site | part connected with the 2nd full height rib 28 by the 1st connection rib 33 among the outer cylinder parts 21 can be raised, As a result, the rigidity of the lower surface structure rib 31 connected with the said site | part Can also be improved. Accordingly, the rigidity of the central part (particularly the lower part) of the pallet 1 constituted by the central pillar 4 and the lower deck 6 and the upper deck 5 in the vicinity thereof can be further increased, and the central part of the pallet 1 is deformed so as to be loosened. Such a situation can be prevented more reliably. In particular, as in the present embodiment, the first connection rib 33 is provided corresponding to the longitudinal direction of the pallet 1 so that the center part of the pallet 1 is supported only by the outer peripheral edge (both sides) of the pallet 1. Can be more effectively prevented.

  Further, in the present embodiment, a connecting rib 34 that connects the first connecting rib 33 and the first full height rib 27 that extends substantially parallel to the first connecting rib 33 is provided. For this reason, the rigidity of the 1st connection rib 33 can be improved, and a deformation | transformation, a side-down, etc. of 1st connection rib 33 itself can be prevented more reliably.

  Further, in the present embodiment, among the lower surface constituting ribs 31 constituting the lower deck 6 (lower deck surface 16) of the pallet 1, it extends along the short direction of the pallet 1 and is connected to the outer cylinder portion 21. Is formed so as to extend to the inner peripheral side of the outer cylinder portion 21, and a second connection rib 38 that is connected to the first full height rib 27 is provided. As described above, the second connecting rib 38 is provided not only in the longitudinal direction of the pallet 1 but also in the lateral direction, so that the pallet is supported only by the outer peripheral edge (both sides) of the pallet 1. It is possible to more reliably prevent the slack at the center part.

  Furthermore, in this embodiment, since the pallet 1 is of a type in which the thickness of the lower deck 6 is thinner than that of the upper deck 5, the lower part of the pallet 1 is a part that is particularly susceptible to deformation. Therefore, the effect of preventing the deformation of the central part of the pallet 1 is more reliably exhibited by applying the reinforcing structure such as the connecting ribs 33 and 38 to the lower part of the central part of the pallet 1. . Furthermore, in this embodiment, the number of ribs is not increased unnecessarily, but a relatively low strength and easily deformable rib is connected to a relatively strong and difficult to deform rib, etc. Strength is effectively increased. In particular, in the present embodiment, the connecting rib 34 that connects the first connecting rib 33 and the first full height rib 27 is used as a part of the second connecting rib 38 so that the ribs are not increased as much as possible. Has been. Therefore, it is possible to avoid a situation in which the mold for molding the space surrounded by the ribs of the pallet 1 becomes too small and the mold is easily damaged.

  In addition, among the upper surface constituting ribs 41 constituting the upper deck 5 (upper deck surface 15) of the pallet 1, what extends along the longitudinal direction of the pallet 1 and is connected to the outer cylinder portion 21 is the outer cylinder portion. An upper connection rib 43 that is formed so as to extend to the inner peripheral side of the 21 and is connected to the second full height rib 28 is provided. In this way, the upper connection for connecting the upper surface constituting rib 41 and the full height rib 26 (first full height rib 27) not only on the lower deck surface 16 side of the pallet 1 but also on the upper deck surface 15 side. By providing the ribs 43, it is possible to more surely prevent the pallet 1 from loosening when it is supported only by the outer peripheral edge (both sides) of the pallet 1.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) In the above embodiment, the pallet 1 is a single-sided use type pallet 1 that uses one side (upper deck surface 15) as a mounting surface. It may be embodied in a pallet of a type (symmetrical shape). Further, in the above embodiment, the area surrounded by the lower connecting bars 13 on the four sides is closed by the lower auxiliary bars 14, but the area surrounded by the lower connecting bars 13 on the four sides is vertically moved. The pallet having a caster opening for grounding the wheel provided on the front end of the fork of the hand lift inserted into the fork insertion portion 8 is provided. It is also possible to

  (B) In the above embodiment, of the upper surface constituting rib 41 constituting the upper deck 5 (upper deck surface 15) on the outer peripheral side of the outer cylinder portion 21, the outer cylinder extends along the short direction of the pallet 1. What is connected to the portion 21 is formed so as to extend straight to the inner peripheral side of the outer cylinder portion 21, and an upper (second) connection rib connected to the first full height rib 27 is provided (for example, the connection rib 34 is provided). It may be extended to the upper deck surface 15).

  (C) In the above embodiment, the lower surface constituting rib 31 and the upper surface constituting rib 41 connected to the outer cylinder portion 21, and the connecting ribs 33, 38, 43 extending to the inner peripheral side of the outer cylinder portion 21 so as to be substantially continuous therewith. , And the reinforcing ribs 32, 37, 42, 44 may not completely coincide with each other in width, height, position, etc., and at least a part of the reinforcing ribs 32, 37, 42, 44 is continuous in the longitudinal direction or the short direction of the pallet 1. (For example, the side line may be slightly shifted). In this case, the lower surface constituting rib 31, the upper surface constituting rib 41, the connecting ribs 33, 38, 43, and the reinforcing ribs 32, 37, 42, 44 support each other to increase the rigidity of the center portion of the pallet 1. An effect is certainly played.

  (D) In the said embodiment, although the pallet 1 is comprised by the polypropylene, it is good also as comprising by other resin materials, such as polyethylene, PET, and polyamide.

  DESCRIPTION OF SYMBOLS 1 ... Pallet, 2 ... Corner pillar, 3 ... Intermediate pillar, 4 ... Center pillar, 5 ... Upper deck, 6 ... Lower deck, 8 ... Fork insertion part, 15 ... Upper deck surface, 16 ... Lower deck surface, 21 ... Outside Tube portion, 22 ... Inner tube portion, 23 ... General surface, 24 ... Corner surface, 26 ... Full height rib, 27 ... First full height rib, 28 ... Second full height rib, 31 ... Bottom face configuration rib, 33 ... First connection rib , 34 ... connecting ribs, 38 ... second connecting ribs, 41 ... upper surface constituting ribs, 43 ... upper connecting ribs.

Claims (4)

A pallet having a substantially rectangular shape in plan view,
Four corner pillars at the four corners of the pallet;
An intermediate column provided at an intermediate point between the pair of corner columns arranged along the side of the pallet;
A central pillar provided in the center of the pallet;
An upper deck connecting between the corner pillars, the intermediate pillars, and the upper ends of the central pillars;
The corner pillar, the intermediate pillar, and a lower deck connecting between the lower ends of the central pillar,
An upper deck surface on which an article can be placed is configured by the corner column, the intermediate column, the central column, and the upper surface of the upper deck.
The corner column, the intermediate column, the central column, and the lower deck surface to be grounded to the installation surface is configured by the lower surface of the lower deck,
The central pillar is
It extends toward the lower deck surface from the upper deck surface, and the outer cylindrical portion of a substantially rectangular inner dimensions that a wider in the longitudinal direction of the pallet to correspond to the outer peripheral shape of the pallet,
A general surface that extends from the upper deck surface to the lower deck surface, is disposed on the inner peripheral side of the outer tube portion, and extends in parallel with each inner surface of the outer tube portion, and a corner portion formed by the general surfaces. An inner cylinder portion having a substantially octagonal cross section having a corner surface formed so as to bevel chamfered diagonally,
The overall height extending from the upper deck surface to the lower deck surface is connected between the boundary portion of the general surface with the corner surface and the outer cylinder portion so as to be substantially orthogonal to the general surface. Ribs are provided, and
Out of the lower surface constituting ribs constituting the lower deck on the outer circumferential side of the outer cylinder portion, the lower surface constituting ribs extending along the longitudinal direction of the pallet and connected to the outer cylinder portion are arranged on the inner circumferential side of the outer cylinder portion. A pallet, characterized in that it is formed so as to extend substantially straight and provided with connecting ribs connected to the entire height rib.   The pallet according to claim 1, wherein a connecting rib is provided for connecting the connecting rib and the full-height rib extending substantially parallel to the connecting rib.   Out of the lower surface constituting ribs constituting the lower deck on the outer circumferential side of the outer cylinder portion, the lower surface constituting ribs extending along the short direction of the pallet and connected to the outer cylinder portion are arranged on the inner circumferential side of the outer cylinder portion. The pallet according to claim 1, further comprising a connection rib that is formed so as to extend substantially straight and is connected to the entire height rib.   The pallet according to any one of claims 1 to 3, wherein a thickness of the lower deck is configured to be thinner than a thickness of the upper deck.

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