JP4748596B2 - Dunage - Google Patents

Description

  The present invention relates to a plane-shaped substantially square dunnage provided with a plurality of bulged leg portions formed by bulging a part of a plate-like member downward and constricting the lower side.

Conventionally, as this type of dunnage, a plurality of bulging legs can be placed in contact with a flat surface such as a floor surface or an upper surface of a pallet, for example. In addition, the dunnage is generally arranged between the stacked packages when used, and a plurality of dunnages themselves are stacked when not in use (see, for example, Patent Documents 1, 2, and 3).
Japanese Patent Laying-Open No. 2002-205761 (paragraph [0004], FIG. 1) Japanese Patent Laid-Open No. 2000-289741 (FIG. 1) JP 11-278453 A (FIG. 4)

  By the way, as shown in FIG. 12, in the dunnage 2 in which the work 1 having the processing surface 1A on a part of the upper surface is used as a load, the baggage provided in the dunnage 2 is provided so as not to damage the processing surface 1A. There may be a demand for a configuration in which the contact portion 3 is brought into contact with the non-processed surface 1B of the workpiece 1 and the dunnage 2 can be held in a state where it floats upward from the processing surface 1A. In such a dunnage 2, when the processing surface 1A of the workpiece 1 is disposed at the corner portion 2C of the dunnage 2, the load contact portion 3 and the bulging leg portion 4 are disposed at the tip of the corner portion 2C. I can't. For this reason, the corner portion 2C is cantilevered and receives its own weight. Then, as shown in FIG. 13, when a plurality of dunnages 2 are stacked and time elapses, as shown in FIG. 14, the corner portion 2C of the lower dunnage 2 among the plurality of stacked dunnages 2 hangs down by its own weight. The state can be plastically deformed or creep deformed. In particular, in the dunnage 2 having a step at the corner 2C, as shown in FIG. 15, the lower step portion 5B of the step wall in the upper dunnage 2 is in contact with the upper step portion 5A of the step wall in the lower dunnage 2. The corner portion 2C can be bent greatly.

  When the corner portion 2C of the dunnage 2 is deformed into a hanging state, as shown in FIG. 16, the corner portion 2C of the dunnage 2 is processed by the workpiece 1 when the dunnage 2 is disposed between the stacked packages. There arises a problem of contacting the surface 1A.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a dunnage capable of preventing the corner portion from being deformed.

  The dunnage according to the invention of claim 1 made to achieve the above object is a planar shape comprising a plurality of bulged leg portions in which a part of the plate-like member is bulged downward and the lower side is narrowed. A substantially rectangular dunnage, which is arranged between the stacked loads when in use, and a load contact portion formed at a position relatively far from the corner portion of the dunnage is in contact with the load from above and the corner portion In a dunnage where a plurality of bulging legs are fitted in the vertical direction, the bulging legs that are relatively close to the corner are It is characterized in that the fitting depth is smaller than the fitting depth between the bulging legs relatively far from the corner.

  According to a second aspect of the present invention, in the dunnage according to the first aspect, the bulging leg portion that is relatively far from the corner portion has an inclination angle that the side wall of the bulging leg portion that is relatively close to the corner portion is inclined with respect to the vertical direction. It is characterized in that the side wall of this is smaller than the inclination angle inclined with respect to the vertical direction.

  According to a third aspect of the present invention, in the dunnage of the first or second aspect, a part of the side wall of the bulging leg portion that is relatively close to the corner portion is inclined toward the front end side of the corner portion so that the inclination angle becomes large. It is characterized in that it is bulged to form a corner reinforcement.

  According to a fourth aspect of the present invention, in the dunnage according to any one of the first to third aspects, the tip end side of the corner portion is raised stepwise, and the inclination angle of the step wall with respect to the vertical direction is set to the side wall of the bulging leg portion. It is characterized by being larger than the inclination angle.

[Inventions of Claims 1 and 2]
According to the configuration of claim 1, when a plurality of dunnages are stacked and stacked, the bulging legs are fitted between the upper and lower dunnages. Here, in the present invention, the depth at which the bulging legs relatively close to the corner portion can be fitted is smaller than the depth at which the bulging legs relatively far from the corner portion can be fitted. The part of the dunnage that is relatively far from the corner sinks and warps when the corner is lifted up by the bulging legs near the corner. This eliminates or reduces the load applied to the corner portion of the lower dunnage from the corner portion of the upper dunnage, and prevents the corner portion from being deformed into a drooping state.

  As described above, the thickness of the side wall of the bulging leg portion that is relatively close to the corner portion is set as the structure for providing the depth that can be fitted between the bulging leg portions. It may be larger than the thickness, or a separate member for the bottom may be placed on the inner bottom of the bulging leg that is relatively close to the corner. In addition, as in the configuration of claim 2, the side wall of the bulging leg portion relatively close to the corner portion is inclined with respect to the vertical direction, and the side wall of the bulging leg portion relatively far from the corner portion is the vertical direction. The angle of inclination may be smaller than the angle of inclination.

[Invention of claim 3]
According to the structure of Claim 3, the amount of bending deformation to the downward direction of a corner part can be suppressed by a corner reinforcement part.

[Invention of claim 4]
According to the configuration of the fourth aspect of the present invention, the top end side of the corner portion is raised stepwise, and the inclination angle of the step wall with respect to the vertical direction is made larger than the inclination angle of the side wall of the bulging leg portion. The contact between the step portions is avoided, and the load that the corner portion of the lower dunnage receives from the corner portion of the upper dunnage can be eliminated.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the dunnage 10 of the present embodiment has a tray structure in which the planar shape is substantially square and the outer edge wall 17 is provided upright on the entire outer edge portion. The dunnage 10 is manufactured by, for example, vacuum forming. Specifically, a molding die having a plurality of forming protrusions (not shown) is heated, and a synthetic resin plate member is laid thereon. Next, the suction hole provided in the molding die is set to a negative pressure to remove air between the plate-like member and the molding die, and a plurality of bulging projections 11 corresponding to the molding projections (FIG. 1B). )) Is formed into a plate-like member. And after cooling a plate-shaped member with a shaping die, the plate-like member is removed from a shaping die, and the dunnage 10 of this embodiment is completed.

  As shown in FIG. 1A, the dunnage 10 is divided into four regions R1 that are divided into two equal parts in the vertical and horizontal directions, and each of the regions R1 has the same uneven shape. And the workpiece | work 50 (refer FIG. 3) as a load is accommodated for every area | region R1. Further, at a plurality of locations including the corner portion 20 of the dunnage 10, a shelf portion 16 having a stepped height is formed, and the main plate portion 14 lowered by one step from the shelf portion 16 has a planar shape at the lower end portion of the work 50. Matched shape. When the workpiece 50 is placed on the main plate portion 14, the step wall 15 between the shelf portion 16 and the main plate portion 14 faces the side surface of the workpiece 50, and the workpiece 50 is positioned in the horizontal direction.

  Part of the upper surface of the workpiece 50 is provided with a specially processed surface 52 (see FIG. 3) that has been processed and / or surface-treated. Further, when the workpiece 50 is placed on the dunnage 10, a part of the special processing surface 52 is arranged at the corner portion 20 in the dunnage 10.

  As shown in FIG. 1B, a part of the plurality of bulging projections 11 provided in the dunnage 10 constitutes a plurality of bulging legs 13 according to the present invention. The entire lower end surface is flush. For example, when the dunnage 10 is placed on the flat placement surface 30 of the pallet, for example, the lower end surfaces of the bulging legs 13 are in contact with the placement surface 30, and the entire dunnage 10 is placed. The corner portion 20 of the dunnage 10 is held in a cantilever shape while being kept floating from the placement surface 30.

  A lower end portion of a part of the plurality of bulging projections 11 is a load contact portion 12. These load contact portions 12 are located above the lower end surface of the bulging leg portion 13. As shown in FIG. 3, when the dunnage 10 is disposed between a plurality of stacked workpieces 50, the load contact portion 12 abuts on the non-processed surfaces 51 </ b> A and 51 </ b> B of the workpiece 50, and the entire dunnage 10 is It is held in a state of floating upward from the workpiece 50. Note that the heights of the load contact portions 12 are different depending on the height difference between the non-processed surfaces 51A and 51B.

  In FIG. 2, one region R1 of the dunnage 10 is shown enlarged. As shown in the figure, in the region R1, a plurality of bulging leg portions 13 and load contact portions 12 are arranged in a scattered manner. And the bulging leg part 13 arrange | positioned nearest to the front-end | tip of the corner part 20 of the dunnage 10 makes a planar shape a rectangle, and a pair of side walls 13B and 13B which comprise the long side are the corner part 20. Are opposed in a substantially diagonal direction. In addition, the side wall 13B of the bulging leg portion 13 is integrally formed with a bulging groove portion 13C that protrudes slightly downward from the main plate portion 14. The bulging groove portion 13 </ b> C extends from the side wall 13 </ b> B to the step wall 15 in front of the shelf portion 16 in the corner portion 20.

  The other bulging legs 13 other than the above-mentioned bulging legs 13 are arranged in a scattered manner at positions relatively far from the corner 20 in each region R1. Among them, one bulging leg portion 13 disposed at a position closer to the center of the dunnage 10 has an intermediate portion of the truncated cone protruding downward from the main plate portion 14 as shown in the right side portion of FIG. A structure with a reduced diameter is formed, and the stepped portion is a load contact portion 12. As shown in FIG. 2 (A), the other bulging legs 13 have a substantially quadrangular planar shape.

  FIG. 4 shows an enlarged part of the cross section of the dunnage 10. As illustrated in the figure, all the bulging legs 13 have a narrowed shape (tapered shape) toward the lower end. The inclination angle θ1 at which the side wall 13B of the bulging leg portion 13 that is relatively close to the corner portion 20 is inclined with respect to the vertical direction is greater than the inclination angle θ2 of the side wall 13A of the bulging leg portion 13 that is relatively far from the corner portion 20. It is getting smaller. Further, the side walls of the bulging protrusions 11 (see FIG. 2B) other than the bulging leg portions 13 are also inclined with respect to the vertical direction, and their inclination angles are relatively far from the corner portion 20. The inclination angle θ2 of the side wall 13A of the portion 13 is substantially the same.

  As a result, when the dunes 10 and 10 are stacked and stacked, as shown in FIG. 5, the depth (that is, the bulging legs) between the bulging legs 13 and 13 that are relatively close to the corner portion 20 can be fitted. The depth at which the upper surface side concave portion 13X of the portion 13 can be fitted to the other bulging leg portion 13) is smaller than the depth at which the bulging leg portions 13, 13 that are relatively far from the corner portion 20 can be fitted to each other. . As a result, in the portion relatively close to the corner portion 20, the lifting amount L <b> 1 between the dunnages 10 and 10 (for example, the interval between the main plate portions 14 and 14) becomes relatively large, and in the portion relatively far from the corner portion 20, The amount of lift L2 between the dunnages 10 and 10 is relatively small.

  This completes the description of the configuration of the dunnage 10 of the present embodiment. Next, the effect of the dunnage 10 will be described. When the dunnage 10 is used, the dunnage 10 is placed on, for example, a flat placement surface 30 of a pallet, and the workpiece 50 is placed on each of the four regions R1 of the dunnage 10.

  Next, as shown in FIG. 3, another dunnage 10 is placed on the upper surface of the work 50 placed on the dunnage 10. Then, the load contact portion 12 of the dunnage 10 comes into contact with the workpiece 50, and the corner portion 20 of the dunnage 10 has a cantilever shape so as to cover the special processing surface 52 of the workpiece 50 from a position apart from the upper side. Further, the bulging leg portion 13 (the bulging leg portion 13 at the right end in FIG. 3) having a truncated cone shape and integrally including the load contact portion 12 among the plurality of bulging leg portions 13 is provided in the work 50. Thus, the dunnage 10 is positioned in the horizontal direction with respect to the lower workpiece 50. In this way, the plurality of workpieces 50 are stacked with the dunnage 10 interposed therebetween, and can be transported together with the pallet and the dunnage 10.

  When the dunnage 10 is not used, the dunnages 10 and 10 are stacked and stacked as shown in FIG. Then, the bulging legs 13 and 13 are fitted between the upper and lower dunnages 10 and 10. Here, in this embodiment, the fitting depth between the bulging legs 13 and 13 that are relatively close to the corner portion 20 is set to the fitting depth between the bulging legs 13 and 13 that are relatively far from the corner portion 20. Since the depth is smaller than the possible depth, the stacked dunnage 10 sinks in a portion relatively far from the corner portion 20, and the corner portion 20 is lifted by the bulging leg portion 13 relatively close to the corner portion 20. Become warped. As a result, the corner portion 20 of the lower dunnage 10 is separated from the corner portion 20 of the upper dunnage 10, so that the load received from the upper dunnage 10 is eliminated, and the corner portion 20 is prevented from being deformed into a suspended state. It is. When these dunnage 10 is used again, the corner portion 20 of the dunnage 10 does not come into contact with the special machining surface 52 of the workpiece 50 as in the prior art.

[Second Embodiment]
As shown in FIG. 7, the dunnage 10 of the present embodiment tilts a part of the side wall 13 </ b> B of the bulging leg portion 13 that is relatively close to the corner portion 20 toward the front end side of the corner portion 20 so that the inclination angle becomes large. And only the point which made it bulge and formed the corner reinforcement part 13D differs from the said 1st Embodiment. Specifically, in the dunnage 10, a rectangular region extending from the upper edge to the middle in the vertical direction is formed at the lateral center of the side wall 13B of the bulging leg 13 facing the tip side of the corner 20. The wall portion corresponding to the rectangular region is tilted outward from the entire side wall 13B with the lower edge as a fulcrum, and the inclined wall 13E having a larger inclination angle with respect to the vertical direction than the entire side wall 13B is formed. Yes. And it has the structure connected by the triangular walls 13F and 13F between the edge part of the inclination wall 13E, the side wall 13B, and the main board part 14. FIG.

  According to the configuration of the present embodiment, the corner reinforcing portion 13D is arranged at the base end portion on the bulging leg portion 13 side where the bending stress is most concerned among the corner portions 20 having a cantilever shape, and below the corner portion 20 It is possible to suppress the amount of bending deformation.

[Third Embodiment]
As shown in FIG. 8, in the dunnage 10 of the present embodiment, the thickness t1 of the side wall 13B of the bulging leg portion 13 that is relatively close to the corner portion 20 is the side wall of the bulging leg portion 13 that is relatively far from the corner portion 20. It is larger than the thickness t2 of 13A. The inclination angles of the side walls 13A and 13B are the same between the bulging leg 13 that is relatively close to the corner 20 and the bulging leg 13 that is relatively far. Except for these, the configuration is the same as that of the first embodiment.

  Even in the configuration of the present embodiment, the depth at which the bulging leg portions 13 and 13 that are relatively close to the corner portion 20 can be fitted to each other is set to the fitting between the bulging leg portions 13 and 13 that are relatively far from the corner portion 20. The depth can be made smaller than possible, and the same effects as those of the first embodiment can be obtained.

[Fourth Embodiment]
As shown in FIG. 9, in the dunnage 10 of the present embodiment, a separate bottom upper member 13 </ b> J is fixed to the bottom surface of the upper surface side recess 13 </ b> X of the bulging leg portion 13 that is relatively close to the corner portion 20. And if the bulging leg parts 13 and 13 comparatively close to the corner part 20 are fitted, the lower end part of the bulging leg part 13 will contact | abut the member 13J for bottoms, and fitting will become shallow. Even with this configuration, the same effects as the first and third embodiments can be obtained.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

  (1) As conceptually shown in FIG. 10A, the inclination angle θ1 of the side wall 13B in the bulging leg portion 13 relatively close to the corner portion 20 is set to be equal to that in the bulging leg portion 13 relatively close to the corner portion 20. After making it smaller than the inclination angle θ2 of the side wall 13A, the inclination angle θ4 of the step wall 15 provided on the tip side of the corner portion 20 may be made larger than the inclination angle θ2 of the side wall 13A of the bulging leg portion 13. By doing so, as shown in FIG. 10 (B), when the dunnages 10 and 10 are stacked and stacked, the interval between the closest portions between the corner portions 20 and 20 of the upper and lower dunnages 10 and 10 is determined. The corner portions 20 and 20 can be reliably prevented from coming into contact with each other.

  Although not included in the technical scope of the present invention, as shown in FIG. 11, the depth at which the bulging leg portions 13 and 13 can be fitted to each other is uniform regardless of whether the corner portion 20 is near or far from the corner portion 20. In addition, when the dunes 10 and 10 are stacked, the corner portions 20 and 20 are separated from each other between the upper and lower dunes 10 and 10 by the contact between the side walls of the bulging legs 13 and 13. You may make it the structure hold | maintained. This configuration also prevents the corner portion 20 from being deformed into a suspended state.

  (2) In the first embodiment, the lower end portion of the bulging leg portion 13 is configured not to come into contact with the work 50 (the load). However, the lower end portion of the bulging leg portion 13 can be brought into contact with the load. You may make it the structure which served as the "luggage contact part" which concerns on this invention.

(A) A plan view of the dunnage according to the first embodiment of the present invention, (B) a side sectional view of the plan view taken along the line AA. A partial plan view of the dunnage, (B) a cross-sectional side view in the B-B cross section of the partial plan view Side view of Dunedge in use Enlarged side sectional view of the bulging leg Enlarged side sectional view of the bulging leg with the dunnage overlaid Side view of multiple Dunges stacked Partial perspective view of the dunnage of the second embodiment The expanded sectional side view of the bulging leg part of 3rd Embodiment The expanded sectional side view of the bulging leg part of 4th Embodiment (A) Side cross-sectional view of the dunnage of modification (1), (B) Side cross-sectional view of the dunnage being overlaid Side cross-sectional view of dunnage different from the present invention Side view of a conventional dunnage Side view of a stack of conventional dunes Cross-sectional side view of a conventional dunnage with its corners hanging Cross-sectional side view of a conventional dunnage with its corners hanging Side sectional view of a conventional dunnage in contact with a load

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Dungege 12 Load contact part 13 Expansion leg part 13A, 13B Side wall 13D Corner reinforcement part 15 Step wall 20 Corner part 30 Mounting surface 50 Machine parts (luggage)
θ1, θ2, θ4 Inclination angle

Claims (4)

A plane-shaped substantially square dunnage provided with a plurality of bulging leg portions swelled downward by bulging a part of a plate-like member downward,
When in use, a load contact portion that is disposed between the stacked loads and is formed at a position relatively far from the corner portion of the dunnage is in contact with the load from above, and the corner portion is moved upward from the load. Hold it away from
When not in use, in a dunnage where a plurality of bulges are stacked and stacked in the vertical direction,
The depth of fitting between the bulging legs relatively close to the corner is smaller than the depth of fitting between the bulging legs relatively far from the corner. .   The inclination angle at which the side wall of the bulging leg portion that is relatively close to the corner portion is inclined with respect to the vertical direction, and the inclination angle at which the side wall of the bulging leg portion that is relatively far from the corner portion is inclined with respect to the vertical direction. The dunnage of claim 1, wherein the dunnage is smaller.   A part of the side wall of the bulging leg portion that is relatively close to the corner portion is inclined and bulged toward the tip side of the corner portion so that the inclination angle is increased, thereby forming a corner reinforcing portion. The dunnage according to claim 1 or 2. The tip end side of the corner portion is raised stepwise, and the inclination angle of the step wall with respect to the vertical direction is made larger than the inclination angle of the side wall of the bulging leg portion. Dunage described in crab.

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