JP2007297139A - Freely foldable cargo pallet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the load bearing of panels positioned on both sides of a cargo pallet stackable in a folded state. <P>SOLUTION: Back and forth ends of both sides of a carrier 1 keep a support member 13 for stacking a folded pallet upright outside a panel 2 on both sides of the cargo pallet. A laying member 15 of the carrier 1 is laid on a frame 14 of the carrier 1 inside apart from the lower side of the panel 2 so as not to support the lower side of the panel 2. Depth members 16a of both sides composing the frame 14 of the carrier 1 have panel support members 21a that directly support the lower end of the panel 2. An engaging member 24 adjacent to the panel support member 21a is positioned in order to pinch the lower end of the panel 2 between the support member and the support member 13 for stacking the folded pallet. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a foldable cargo handling pallet.

As a foldable cargo handling pallet, as described in Patent Document 1, a cargo bed, a back panel foldably connected to the cargo bed so as to be foldable on the cargo bed, and stacked inside the back panel The left and right side panels are slidably connected to the vertical side of the back panel so as to be foldable freely, and the loading platform has lower sides of the left and right side panels that extend forward from the standing back panel at right angles. It is known that a panel support portion to be supported and an upward projecting member that prevents the left and right side panels supported by the left and right panel support portions from opening outward, that is, a folding pallet stacking support portion is provided. ing.
JP 2000-53132 A

  In this type of foldable cargo handling pallet, folding the left and right side panels so that they overlap the outside of the back panel is a hindrance to the folding pallet stacking support that protrudes outside the left and right side panels. Therefore, as disclosed in Patent Document 1, the left and right side panels are folded so as to overlap the back panel. In such a configuration, as is known in a foldable cargo handling pallet of a type that does not have a folding pallet stacking support, a protruding piece that is fitted and supported in the depth material of the loading frame frame is provided. Since it cannot project from the lower sides of the left and right side panels, as disclosed in Patent Document 1, the left and right side panels are laid on panel support portions formed on the left and right sides of the cargo bed, for example, on the frame of the cargo bed. It will be supported on the left and right sides of the installed laying material. In such a conventional configuration, the vertical load acting on the left and right side panels during stacking causes the lower side of the left and right side panels to slide outward and cause a positional shift. Even though it can be prevented by the stacking support, there is no way to prevent the bottom sides of the left and right panels from slipping inward and causing misalignment. For this reason, the load bearing performance at the time of stacking was supposed to be lowered.

  The present invention aims to provide a foldable cargo handling pallet capable of solving the above-mentioned conventional problems. In the present invention according to claim 1, the means is described later. When the reference numeral of the form is attached, the loading platform 1, the back panel 4 foldably connected to the loading platform 1 so as to be folded over the loading platform 1, and the inner side of the back panel 4 are overlapped. The left and right side panels 2 and 3 are foldably connected to the vertical side of the back panel 4 so as to be foldable, and the left and right side panels extend from the standing back panel 4 to the front side at right angles. Panel support portion 21a for supporting the lower sides of 2, 3 and an upward projecting member (vertical member 29) for preventing the left and right side panels 2, 3 supported by the left and right panel support portions 21a from opening outward. And left and right panel support 2 It is supported right and left side panels 2 and 3 has a configuration in which the left and right positioning engagement portion 24 that engages the lower edge of each side panel 2 when closing the inside provided with a.

  In carrying out the present invention having the above-described configuration, when the leg bodies 12 are projected at two front and rear positions on both the left and right sides of the loading platform 1, the upward projecting member (vertical member) as described in claim 2 29) can also be used as the folding pallet stacking support portion 13 for supporting the legs 12 of the upper pallet when stacking the folded cargo handling pallets.

  Moreover, when the said loading platform 1 is comprised from the bone frame 14 and the laying material 15 laid on this, the said panel support part 21a is left and right rather than the said laying material 15, as described in Claim 3. It can be provided on the depth members 16a and 16b of the bone frame 14 projecting on both sides. In this case, as described in claim 4, the positioning engagement portion 24 can project from the depth members 16 a and 16 b of the bone frame 14.

  According to the foldable cargo handling pallet according to the present invention having the above-described configuration, the lower sides of the left and right panels supported by the panel support portion on the cargo bed side are the upward projecting members on the cargo bed side (vertical member 29 in the embodiment). It is possible to prevent the lower sides of the left and right side panels from sliding in either the inside or outside direction. Therefore, the load bearing performance during pallet stacking can be significantly improved. In addition, it is not necessary to project the engaging piece that fits into the recessed groove portion on the loading platform side downward from the lower side of the left and right side panels as in the prior art, and the lower side of the left and right side panels can be configured to be flat. Therefore, when folding, the left and right side panels can be easily and simply moved by tilting the back panel slightly backward and lifting the left and right side panels until the lower side reaches a level slightly higher than the positioning engaging portion. Can be folded over to the inside of the back panel. In other words, even if the height of the upward protruding part that prevents the left and right side panels from opening outwards is sufficiently high, and the double pallet stacking support part is also used, or the safety is improved, Since the panel can be folded, it can be used practically without problems.

  According to the configuration of the second aspect, the upward projecting member (vertical member 29 in the embodiment) that prevents the left and right side panels from moving outward can also be used as the folding pallet stacking support portion. Therefore, the present invention can be easily applied to a conventional foldable cargo handling pallet having folding pallet stacking support portions.

  When the loading platform is composed of a bone frame and a laying material laid on the bone frame, according to the configuration of claim 3, panel support portions are generally provided on the left and right sides of the laying material having a mesh structure. The support strength of the left and right side panels can be increased as compared with the case of configuring the left and right side panels, and local deformation of the laying material on the left and right side panels and the loading platform side can be easily suppressed during stacking. In this case, according to the configuration described in claim 4, when the left and right side panels supported by the left and right panel support portions close inward, the positioning engagement that engages with the lower sides of the left and right side panels. Compared with the case where the portion is projected on the laying material on the loading platform side, it is easy to carry out even when another member is attached to configure the positioning engaging portion, and of course, the depth material of the bone frame of the loading platform. Is formed of a formed steel material, the positioning engagement portion can be formed integrally with the depth material.

  A specific embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 and 2, 1 is a loading platform, 2 and 3 are left and right side panels that stand up from the left and right sides of the loading platform 1, and 4 is a loading platform 1 A back panel 5 rising from the rear side of the rear door 5 is a door panel rising from the front side of the loading platform 1. The left and right side panels 2 and 3 are swingably connected to the left and right side sides of the back panel 4 by coil hinges 6 and 7 having rotation axes along the left and right side sides of the back panel 4, The back panel 4 is swingably connected to the loading platform 1 at the front end side of the inward bent portion 4a by a coil hinge 8 having a rotation axis along the front end side of the inward bent portion 4a. The lower side of the panel 5 is connected to the front side of the loading platform 1 by a coil hinge 9 having a rotation axis along the front side of the loading platform 1 so as to be swingable. In the illustrated example, the door panel 5 includes a lower half portion 5a and an upper half portion 5b that are swingably connected to each other by a coil hinge 10 having a horizontal rotation axis, and each door panel lower half portion 5a. The upper half 5b is locked to the front side of the left and right side panels 2 and 3 by the locking means 11 at a closed position where the front side sides of the left and right side panels 2 and 3 are closed.

  The cargo handling pallet having the above structure is folded so that the lock means 11 is released and the door panel 5 is stacked on the loading platform 1, and the left and right side panels 2 and 3 are folded on the inside of the back panel 4. By folding the back panel 4 so as to be superimposed on the loading platform 1 together with the left and right side panels 2 and 3 superimposed on the inside, the bulk can be reduced.

  Further, leg bodies 12 are attached below the front and rear ends of the left and right sides of the loading platform 1. These four legs 12 form a space for inserting a fork of a forklift at the lower side of the loading platform 1 and, as shown in FIGS. 4A and 5A, when stacking the cargo handling pallets, A lower opening fitting portion 12a for fitting the upper and lower ends of the left and right side panels 2, 3 to prevent the upper and lower cargo handling pallets from being displaced from front to back and left and right, And a grounding portion 12b that is landed inside the fitting portion 12a. Further, folding pallet stacking support portions 13 are provided at both front and rear ends of the left and right sides of the loading platform 1 of the cargo handling pallet. Specifically, these four folding pallet stacking support portions 13 are continuously connected upward from the respective leg bodies 12 and arranged outside the left and right side panels 2 and 3. When the pallets folded so that the panels 2 to 5 are stacked on the loading platform 1 are stacked as shown in FIGS. 4B and 5B, the legs 12 of the upper pallet are supported by the fitting portions 12 a.

  If the structure of the loading platform 1 is demonstrated concretely, as shown in FIG.3 and FIG.4, the loading platform 1 is comprised from the bone frame 14 and the laying material 15. FIG. The bone frame 14 is composed of depth members 16a and 16b arranged on the left and right sides of the loading platform 1, and left and right frontage members 17a to 17e constructed between the depth members 16a and 16b. The laying material 15 is of a mesh structure configured by electrical resistance welding of the lower front-rear direction wire 18 and the upper left-right direction wire 19 arranged in a lattice shape to each other at the intersection of the two, Between the depth members 16a and 16b on both the left and right sides of the bone frame 14, it is laid and fixed on the frontage members 17a to 17e. Each left and right direction wire 19 has a length that slightly protrudes from the front and rear direction wire 18 positioned at both ends in the left and right direction, and each front and rear direction wire 18 is positioned in the left and right direction at both ends in the front and rear direction. It has a length that overlaps the end of the wire 19. Thus, the lower side of the door panel 5 is connected to the left and right wire 19a located on the front side of the laying material 15 by the coil hinge 9, and the tip side of the inwardly bent portion 4a of the back panel 4 is laid. The coil 15 is connected to the second horizontal wire 19b from the rear side of the material 15 by the coil hinge 8.

  As shown in FIG. 10, the depth members 16a and 16b of the loading frame frame 14 are lower open mold members having left and right side plate portions 20a and 20b and an upper plate portion 21 connecting between the upper ends of both side plate portions 20a and 20b. In the outer plate 20a, ribs 22 that are bent inward at an intermediate height and bent pieces 23 that are bent inward from the lower side are respectively provided over the entire length of the outer plate 20a. The positioning engagement portion 24 is integrally formed over the entire length by bending the upper plate portion 21 on the inner side of the upper plate portion 21 (the side on the side where the laying material 15 is laid). The upper surface of the upper plate portion 21 outside the positioning engagement portion 24 forms a panel support portion 21a composed of a flat surface that directly supports the lower sides of the left and right side panels 2 and 3. The positioning engagement portion 24 has a substantially right-angled cross section having a side surface 24a rising at a steep angle on the outside of the panel support portion 21a and a slope 24b rising at a gentle angle on the inside.

  Further, as shown in FIGS. 10 and 11, the depth members 16a and 16b are provided with a set of two slits 25a and 25b, respectively, at locations corresponding to the frontage members 17a to 17e of the inner plate portion 20b. ing. On the other hand, each of the frontage members 17a to 17e is made of a groove material that is open on the upper side, and a tongue piece that can be inserted into a pair of slits 25a and 25b of depth members 16a and 16b at both ends in the longitudinal direction. When 27a and 27b protrude from the end edges of the parallel side plates 26a and 26b and the tongue pieces 27a and 27b are inserted into the slits 25a and 25b, as shown in FIG. The bottom plate portion 26c is configured to be flush with the lower ends of the depth members 16a and 16b.

  As shown in FIGS. 6 to 9, each leg 12 is connected to the upper side of the leg bottom plate 30 that forms the fitting portion 12a and the grounding portion 12b, and is opened laterally outward. A planar U-shaped columnar member 28 is attached to a corner between the columnar member 28 and the outer end of the leg bottom plate 30 by welding so as to close the laterally outward opening of the columnar member 28. The vertical member 29 extends upward from the depth members 16 a and 16 b of the loading platform 1 and constitutes the folding pallet stacking support portion 13. The columnar member 28 includes a vertical plate portion 28a that is bent from the inner side of the leg bottom plate member 30, and parallel side plate portions 28b and 28c that are bent from both sides of the vertical plate portion 28a. The leg bottom plate 30 and the columnar member 28 are formed by bending a single plate.

  The vertical member 29 is composed of a vertical plate material having a plate surface parallel to the length direction of the depth members 16a and 16b of the loading platform 1, and an upper portion with respect to a portion below the upper surface of the depth members 16a and 16b. In order to avoid interference with the left and right side panels 2 and 3, a bent portion is provided at an intermediate height so as to slightly protrude outward, and above the columnar member 28 in order to increase the buckling strength against vertical load. A cylindrical reinforcing rib 31 projecting inward is formed on both sides of this portion, and a reinforcing rib 32 projecting outward in a mountain shape is formed at a substantially central position in the width direction over the entire height. is there. Further, one of the cylindrical reinforcing ribs 31 on both sides of the vertical member 29 protrudes upward from the upper end of the vertical member 29, and as shown in FIG. When the pallets in the folded state are stacked using the support portion 13, the fitting portion 12a of the leg 12 of the upper pallet is moved in the front-rear direction from the upper end of the vertical member 29 (the upper end of the support portion 13 for folding pallet stacking). A folding pallet positioning projection 33 is provided to prevent the pallet from coming off.

  The width of the columnar member 28 in the leg body 12 having the above-described configuration is substantially the same as the interval between the two front and rear front members 17a and 17b and the rear front and rear two front members 17d and 17e. In the inner half of the upper end, a protrusion 34 is formed that fits between the front and rear two frontage members 17a and 17b or between the rear front and rear two frontage members 17d and 17e. The upper end of the columnar member 28 (the upper ends of the parallel side plate portions 28b and 28c) between the protrusion 34 and the portion provided with the cylindrical reinforcing rib 31 below the intermediate bent portion 29 is the depth material support surface. It is 28d. The vertical member 29 has a portion that closes the laterally outward opening of the columnar member 28 substantially the same as the width of the columnar member 28, and includes cylindrical reinforcing ribs 31 on the upper side, that is, on both sides. The front portion is configured to be an inverted convex shape by widening the protruding portion so as to protrude from the width of the columnar member 28 to both sides.

  The assembly of the loading platform 1 will be described. First, the front ends 17a to 17e are provided between the pair of left and right depth members 16a and 16b. For example, the tongue pieces 27a and 27b at both ends of the front ends 17a to 17e are provided on the front members The slits 25a and 25b are inserted and arranged. At this time, the depth members 16a and 16b and the frontage members 17a to 17e are not welded to each other. In this state, the four legs 12 are fitted into the projections 34 of the respective columnar members 28 from the lower side between the front and rear two front members 17a and 17b and between the rear front and rear two front members 17d and 17e. In addition, the depth members 16a and 16b are fitted between the protrusions 34 of the respective columnar members 28 and the vertical members 29, and the depth members 16a and 16b are supported by the depth member support surface 28d at the upper end of the columnar member 28. The columnar member 28 including the protrusion 34 of each leg 12 is welded to the contact boundary portion between the depth members 16a and 16b and the frontage members 17a, 17b, 17d, and 17e. Further, the contact boundary portion between the outer surface of the depth members 16a and 16b and the vertical member 29 (reinforcing cylindrical rib 31) of each leg 12 is welded. When the legs 12 are welded, it is also possible to additionally weld the depth members 16a and 16b and the frontage materials 17a, 17b, 17d and 17e at positions adjacent to the columnar members 28 of the legs 12.

  As described above, the four legs 12 (including the vertical member 29) are welded to the depth members 16a and 16b and the frontage members 17a, 17b, 17d, and 17e. 16b and frontage materials 17a, 17b, 17d, and 17e are fixedly connected to each other in a perpendicular direction, and the cargo frame frame 14 including the four legs 12 is completed. At this time, the intermediate gap member 17c is not fixed to the depth members 16a and 16b. Next, the laying material 15 pre-assembled with the lower front / rear direction wire 18 and the upper left / right direction wire 19 is placed between the depth members 16a and 16b on the frontage members 17a to 17e, and each lower front / rear direction. The cross section of the wire 18 and the parallel both side plates 26a, 26b of each of the front ends 17a to 17e is fixed to each other by electric resistance welding, thereby completing the loading platform 1 having the four legs 12. It should be noted that the intermediate gap member 17c that is not fixed to the depth members 16a and 16b is fixed to the bone frame 14 via the laying material 15 by welding with the respective lower front and rear direction wires 18 of the laying material 15. become.

  Each panel 2-5 with respect to the loading platform 1 is assembled | attached as conventionally well-known. As shown in FIGS. 4A and 5A, the foldable cargo handling pallet thus assembled includes left and right side panels 2 and 3 of the lower pallet and four legs 12 (fitting portions 12a) of the upper pallet. 4 folds, each of the pallets folded so that the panels 2 to 5 are stacked on the loading platform 1 are projected upward from the loading platform 1 of the lower pallet as shown in FIGS. 4B and 5B. The pallet stacking support portion 13 (vertical member 29 connected to each leg 12) and the four legs 12 (fitting portion 12a) of the upper pallet can be used for stacking, The lower sides of the left and right panels 2 and 3 of the assembled pallet are the upper surfaces of the left and right depth members 16a and 16b, that is, positioning, as shown by the phantom lines in FIGS. 4A and 7 and the phantom lines in FIG. Engaging portion 24 and It is supported directly by the panel supporting portion 21a between the Ritatami pallet stacking supporting portion 13.

  The side panels 2 and 3 have a mesh structure formed by arranging the inner horizontal wire 35 and the outer vertical wire 36 in a lattice pattern and welding the two at the crossing portions as is conventionally known. Therefore, the lowermost inner horizontal wire 35 constituting the lower side of the side panels 2 and 3 is directly supported by the panel support portions 21a of the left and right depth members 16a and 16b. Therefore, as shown in FIGS. 4A and 5A, when the pallets are stacked using the left and right side panels 2, 3, the lower side of the side panels 2, 3 is the inner side due to the vertical load acting on each side panel 2, 3. Slipping is prevented by the positioning engaging portions 24 (side surfaces 24a rising substantially vertically) of the left and right depth members 16a and 16b, and sliding the lower side of the side panels 2 and 3 to the outside It is blocked by the folding pallet stacking support portion 13 (vertical member 29 connected to each leg 12) on the loading platform 1 side standing on the outside of 2 and 3. Accordingly, the side panels 2 and 3 are not torsionally deformed by the vertical load acting on the side panels 2 and 3, and the vertical load can be received by the buckling strength of the side panels 2 and 3. .

  When folding the cargo handling pallet having the above configuration, the protrusion height of the positioning engagement portion 24 from the panel support portion 21a of the left and right depth members 16a, 16b is low, so that the back panel 4 is tilted slightly backward. The left and right side panels 2 and 3 are lifted, and the lower sides of the left and right side panels 2 and 3 are made slightly higher than the upper end level of the positioning engagement portion 24, so that the right and left side panels 2 and 3 are placed. The joint portion 24 can be moved inward and closed inward, and folded so as to overlap the back panel 4. Further, when assembling the folded pallet, even if the left and right side panels 2 and 3 are moved outward with the back panel 4 standing almost vertically, the inner side of the positioning engagement portion 24 is gently inclined. Due to the presence of the inclined surface 24b, the lower side of the side panels 2 and 3 can be easily moved over the positioning engaging portion 24 to the outside.

  In order to increase the buckling strength of the side panels 2 and 3 during pallet stacking, as shown in FIG. Thicker than the other vertical wire rods 36 can be used for the two outer vertical wire rods 36a and 36b.

  Moreover, in the said embodiment, the panel support part 21a and the positioning member which continue over the full length of the said depth material 16a, 16b to the depth material 16a, 16b of the loading frame frame 14 in the position which supports the left and right both-side panels 2 and 3 are provided. However, when the pallet is stacked, the vertical load does not act on the entire area of the side panels 2 and 3 on average, but the load concentrates on the place where the leg 12 of the upper pallet is supported. Of the total length of the depth members 16a and 16b, an area directly below a portion that supports the leg 12 of the upper pallet of the left and right side panels 2 and 3 (in the illustrated example, an area using the thick outer vertical wires 36a and 36b). You may provide the panel support part 21a and the positioning engaging part 24 only in the area | region to support. Specifically, as shown in FIG. 12, the panel support portion is provided at a required position of the depth members 16a and 16b formed of the upper open channel shape in the loading frame frame 14 of the conventional cargo handling pallet of this type. A separate member 37 having 21a and a positioning engagement portion 24 is put on and fixed by welding or the like, or the separate member 37 is provided at a required position of the depth members 16a and 16b formed of upper open channel members. It can be fitted and fixed by welding or the like.

  Furthermore, in the above embodiment, both ends of the left and right direction wire 19 of the loading platform laying material 15 are not supported by the depth materials 16a and 16b of the loading platform frame 14, so the load resistance at this location is lowered. When this is a problem, as shown in FIG. 13, a support step surface 38 that supports the end portion of the left-right direction wire 19 can be integrally formed on the inner plate portion 20 b of the depth members 16 a and 16 b. . If necessary, the end portions of the left and right wire members 19 and the support step surface 38 can be fixed together by electric resistance welding or the like.

It is a perspective view which shows the whole pallet. It is a schematic perspective view explaining the folding structure of each panel around the loading platform of a pallet. It is a top view explaining the structure of the loading platform provided with the leg, Comprising: The right half is a top view which shows the state which excluded the laying material. Fig. A is a front view of the main part showing the stacked state of the assembled pallets, and Fig. B is a front view of the main part showing the stacked state of the folded pallets. Fig. A is a side view of the main part showing the stacked state of the assembled pallets, and Fig. B is a side view of the main part showing the stacked state of the folded pallets. Fig. A is a side view showing the leg portion of the cargo bed from the outside, and Fig. B is a vertical side view showing the leg portion of the cargo bed from the inside. FIG. 6B is a front view of FIG. 6A. FIG. 6B is a partially cutaway plan view of FIG. 6A. It is a perspective view of the leg body in which the support part for folding pallet stacking was provided continuously. It is a principal part expanded longitudinal cross-sectional view of FIG. It is a perspective view of the principal part which shows the structural member of a carrier frame frame in a decomposition | disassembly state. It is a perspective view of the principal part which shows the modification of the depth material of a carrier frame. It is a vertical front view of the principal part which shows another modification of the depth material of a carrier frame.

Explanation of symbols

1 Loading platform 2, 3 Left and right side panels 4 Back panel 5 Door panel 12 Leg body 13 Folding pallet stacking support (upward projecting member)
14 Bone frame 15 Load bed laying material 16a, 16b Bone frame depth members 17a-17e Bone frame gap material 18, 19 Laying material wire 20a, 20b Depth material side plate 21 Depth material top plate 21a Panel Support portion 24 Positioning engagement portion 24a on both left and right panels Side surface 24b rising at a steep angle Slopes 25a and 25b rising at a gentle angle A pair of slits 27a and 27b

Claims (4)

  A loading platform, a back panel foldably connected to the loading platform so as to be foldable so as to overlap the loading platform, and a swingable connection to a vertical side of the back panel so as to be foldable so as to be stacked inside the back panel The left and right side panels are supported, and the loading platform is supported by a panel support portion that supports the lower sides of the left and right side panels that extend from the standing back panel toward the front at a right angle, and the left and right panel support portions. An upward projecting member that prevents the left and right side panels from moving outward, and positioning that engages the lower side of the left and right side panels when the left and right side panels supported by the left and right side panel support portions close inward A cargo handling pallet provided with an engaging portion.   The loading platform has legs projecting at two front and rear sides of the left and right sides, and the upward projecting member supports the legs of the upper pallet when stacking the folded cargo handling pallets. The foldable cargo handling pallet according to claim 1, which also serves as a folding pallet stacking support portion.   The said loading platform is comprised from the bone frame and the laying material laid on this, The said panel support part is provided in the depth material of the bone frame which protrudes in the both right and left sides from the said laying material. Alternatively, the foldable cargo handling pallet described in 2.   The foldable cargo handling pallet according to claim 3, wherein the positioning engaging portion projects from a depth member of the bone frame.

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