JP4640110B2 - Method of manufacturing base panel for cargo carrying pallet - Google Patents

Description

The present invention relates to a method for manufacturing a base panel for a load carrying pallet in which legs are disposed at both front and rear ends of the left and right sides of a base panel in which a mesh structure is laid on a bone frame .

As a base panel of a load carrying pallet, a mesh structure that constitutes a load supporting surface on a bone frame composed of a depth material in the front-rear direction on both left and right sides and a plurality of frontage members laid between the depth materials. For example, Japanese Patent Application Laid-Open No. H10-133707 discloses a structure that is laid. The conventional base panel of this kind of cargo carrying pallet is constructed by assembling a bone frame by welding the depth material, which is made of a channel material, etc., and the T-shaped joints between the frontage materials, and on the bone frame. The mesh structure was placed and the contact points of both were fixed by electric resistance welding, and each leg was attached by welding to the depth material and the frontage material of the bone frame.
JP 2005-47575 A

  In the base panel of the conventional load carrying pallet as described above, two depth members and at least three or more frontage members are attached before the mesh structure is welded and the four legs are welded. It was necessary to assemble the bone frame by welding work at least at six T-shaped joints between the two and the base panel, and it took a lot of welding costs to assemble the base panel.

The object of the present invention is to provide a method of manufacturing a base panel for a load carrying pallet that can solve the above-mentioned conventional problems, and the features thereof are denoted by reference numerals of embodiments to be described later. As shown in the figure, legs 12 are disposed at both front and rear ends of the left and right sides of the base panel 1, and the base panel 1 is constructed by the depth members 16a and 16b in the front and rear direction of the left and right sides and the depth members 16a and 16b. A base panel for a cargo carrying pallet comprising a bone frame 14 composed of a plurality of front members 17a to 17e laid in between, and a mesh structure 15 laid on the bone frame 14 and constituting a load supporting surface. And a fitting portion (tongue piece 27a) is provided at both ends of each of the front ends 17a to 17e of the bone frame 14, and the fitting portions (tongues) are provided on both depth members 16a and 16b. The piece 27a) fits a certain depth Fitted portion that may be may be provided a (slit 25a), both depth material 16a, 16b and the respective frontage material 17 a - 17 e, and the fitted portion both of the fitting portions (tongues 27a) (slit 25a) Are assembled so that the distance between the two depth members 16a and 16b is restricted by the lengths of the frontage members 17a to 17e. In this state, the four legs 12 are connected to the legs in plan view. By welding the gap members 17a, 17b, 17d, and 17e adjacent to or overlapping the body 12 and the depth members 16a and 16b, the gap members 17a, 17b, 17d, and 17e adjacent to or overlapping each leg. The depth members 16a and 16b are connected and integrated with each other via the legs 12, but the intermediate gap member 17c disposed between the front and rear legs 12 is not welded to the depth members 16a and 16b to manufacture the bone frame 14. And this bone frame The mesh structure 15 disposed over 4, characterized in that welded to at least the frontage material 17 a - 17 e.

  In carrying out the present invention with the above-described configuration, specifically, as described in claim 2, each of the frontage members 17a to 17e of the bone frame 14 has parallel both side plate portions 26a and 26b along the length direction. It is configured by a groove-shaped section, and the fitting portion is constituted by a pair of tongue pieces 27a and 27b extending integrally from the parallel side plate portions 26a and 26b, and the depth members 16a and 16b are fitted. The portion can be composed of a pair of slits 25a and 25b into which the pair of tongue pieces 27a and 27b are inserted.

  Further, as described in claim 3, as the opening members 17 a to 17 e of the bone frame 14, four opening members 17 a, 17 b, 17 d, and 17 e that are respectively disposed at both front and rear ends of the base panel, At least one intermediate front member 17c is arranged, and each leg 12 is provided between two front and rear front members (between 17a, 17b and 17d, 17e) arranged at both front and rear ends of the base panel 1. Protruding portions 34 that are fitted upward and come into contact with the front and rear two frontage materials (17a, 17b and 17d, 17e) and the depth members 16a, 16b are provided, and each leg 12 includes at least the protruding portion 34 and the It can be attached by welding the front and rear two front materials (17a, 17b and 17d, 17e) and the depth materials 16a, 16b in contact with the protrusion 34.

According to the method of manufacturing a base panel for a load carrying pallet according to the present invention having the above-described configuration, when the four legs are attached to the bone frame by welding, the depth materials on both the left and right sides constituting the bone frame and the frontage materials are It is only assembled in a state in which both the fitting portion and the fitted portion are fitted and the distance between both depth members is regulated by the length of each frontage member . By welding four legs to the bone frame to the gap material and the depth material adjacent to or overlapping the leg body in plan view, at least the gap material near the front and rear ends of the base panel and the left and right sides The depth material is fixed integrally with the leg body, and the other front material such as an intermediate front material that is not welded to the leg body is sandwiched and positioned between the left and right depth materials. And finally, by the mesh structure that is placed on the bone frame and welded to each of the front materials, the front material that is not welded to the depth material is also welded to the mesh structure and the legs. It is fixed and integrated with the depth material via the. Therefore, it is not necessary to weld the depth member and each frontage member in order to assemble the frame of the base panel, and the manufacturing cost of the base panel having four legs can be greatly reduced. In addition, the frontage material that is not fixedly integrated with the depth material via the legs is finally fixed and integrated with the depth material via the mesh structure, so that there is no backlash during use.

  In addition, according to the structure of Claim 2, the fitting part required for each frontage material can be comprised easily, and also a pair of tongue piece of a frontage material is inserted in a pair of slit of a depth material. The frontage material can be positioned stably. Further, according to the configuration of the third aspect, the front and rear of the projecting portions of the legs are fitted in the recesses formed between the front and rear two frontage materials and the depth material and are completely positioned. Since it can be welded to the two front members and the depth member, even if the width of the leg is reduced, the leg can be stably fixed and integrated with the bone frame of the base panel. The strength of the frame can also be increased.

  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 base panel, 2 and 3 are left and right side panels 4 standing from the left and right sides of the base panel 1, and 4 is A back panel 5 stands from the rear side of the base panel 1, and a door panel 5 stands from the front side of the base panel 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 base panel 1 at the tip side of the inwardly bent portion 4a by a coil hinge 8 having a rotation axis along the tip side of the inwardly bent portion 4a. The lower side of the door panel 5 is connected to the front side of the base panel 1 by a coil hinge 9 having a rotation axis along the front side of the base panel 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 box-type pallet having the above structure is folded so that the lock means 11 is released and the door panel 5 is overlaid on the base panel 1, and the left and right side panels 2 and 3 are folded on the inside of the back panel 4, respectively. Further, the back panel 4 can be reduced in volume by being folded so as to be superimposed on the base panel 1 together with the left and right side panels 2 and 3 superimposed on the inside thereof.

  Legs 12 are attached below the front and rear ends of the left and right sides of the base panel 1. These four legs 12 form a space for inserting a fork of a forklift on the lower side of the base panel 1, and when stacking the box-type pallets, the upper sides of the left and right side panels 2, 3 of the lower pallet are arranged. A fitting portion 12a that is open on the lower side to prevent the upper and lower box-type pallets from being displaced from front to back and right and left by being fitted to both front and rear ends, and the floor is placed inside the fitting portion 12a when placed on the floor. And a grounding portion 12b. Further, folding pallet stacking support portions 13 are provided at both front and rear ends of the left and right sides of the base panel 1 of the box-type 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 base panel 1 are stacked, the legs 12 of the upper pallet are supported by the fitting portions 12a.

  The configuration of the base panel 1 will be specifically described. As shown in FIG. 3, the base panel 1 includes a bone frame 14 and a mesh structure 15. The bone frame 14 is composed of depth members 16a and 16b disposed on the left and right sides of the base panel 1, and left and right frontage members 17a to 17e installed between the depth members 16a and 16b. The mesh structure 15 is configured by electrically resistance-welding a lower front-rear direction wire 18 and an upper left-right direction wire 19 arranged in a lattice shape to each other at the crossing portion thereof. 14 between the depth members 16a and 16b on both the left and right sides. 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 mesh structure 15 by the coil hinge 9, and the tip side of the inwardly bent portion 4a of the back panel 4 is The coil structure 8 is connected to the second horizontal wire 19b from the rear side of the mesh structure 15.

  As shown in FIGS. 8 and 9, the depth members 16a and 16b of the bone frame 14 are open to the lower side having left and right side plate portions 20a and 20b and an upper plate portion 21 connecting the upper ends of the side plate portions 20a and 20b. In the outer plate portion 20a, ribs 22 projecting inward at an intermediate height and bent pieces 23 bent inward from the lower side are respectively formed on the outer plate portion 20a. The side panel positioning protrusions 24 are 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 mesh structure 15 is laid). The lower sides of the left and right side panels 2 and 3 are formed between the side panel positioning projections 24 of the depth members 16a and 16b and the folding pallet stacking support portion 13 and the upper plates of the depth members 16a and 16b. Supported by part 21 It is.

  Further, the depth members 16a and 16b are provided with a set of two slits 25a and 25b as mating portions at locations corresponding to the frontage materials 17a to 17e of the inner plate portion 20b. On the other hand, each of the frontage members 17a to 17e is composed of a groove material having an open upper side provided with parallel both side plate portions 26a and 26b and a bottom plate portion 26c, and depth members 16a and 16b are provided at both ends in the length direction. Tongue pieces 27a, 27b that can be inserted into a set of two slits 25a, 25b are projected from the edges of the parallel side plate portions 26a, 26b as fitting portions.

  As shown in FIGS. 4 to 7, each leg 12 is connected to the upper side of the leg bottom plate 30 that forms the fitting portion 12 a and the grounding portion 12 b, 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 base panel 1 to constitute 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 bone frame 14, and is 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 protrude slightly outward. From the columnar member 28, in order to increase the buckling strength against a vertical load, Cylindrical reinforcing ribs 31 projecting inward are formed on both sides of the upper portion, and reinforcing ribs 32 projecting in a mountain shape are formed on the outer side at a substantially central position in the width direction over the entire height. It is. 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 the folding pallet stacking support portion 13 formed by the vertical member 29 is used. Stacking to prevent the fitting portion 12a of the leg body 12 of the upper pallet from coming off in the front-rear direction from the upper end of the vertical member 29 (the upper end of the folding pallet stacking support portion 13) when the folded pallets are stacked. A folding pallet positioning projection 33 is formed.

  The width of the columnar member 28 in the leg 12 having the above-described configuration is substantially the same as the interval between the front and rear two front materials 17a and 17b and the rear front and rear two front materials 17d and 17e of the bone frame 14. A protrusion 34 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 is formed in a substantially half region inside the upper end. The upper end of the columnar member 28 (the upper ends of the parallel side plate portions 28b and 28c) between the portion provided with the cylindrical reinforcing rib 31 below the intermediate bent portion and the protruding portion 34 is the depth material support surface 28d. It has become. 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 base panel 1 will be described. First, the frontage members 17a to 17e are provided between the pair of left and right depth members 16a and 16b, and the tongue pieces 27a and 27b (fitting portions) at both ends of the frontage materials 17a to 17e are used as the depth material. They are inserted into the slits 25a and 25b (fitting parts) provided in 16a and 16b. 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, the depth members 16a and 16b and the frontage members 17a, 17b, 17d, and 17e can be directly welded 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 at right angles to complete a bone frame 14 including four legs 12. At this time, the intermediate gap member 17c is not fixed to the depth members 16a and 16b. Next, the mesh structure 15 assembled in advance by the lower front and rear direction wire 18 and the upper left and right direction wire 19 is placed on the frontage materials 17a to 17e between the depth members 16a and 16b, and each lower front and rear The base panel 1 including the four legs 12 is completed by fixing the crossing portions of the directional wire 18 and the parallel side plate portions 26a and 26b of the frontage members 17a to 17e to each other by electric resistance welding. In addition, the intermediate front member 17c that is not fixed to the depth members 16a and 16b is fixed to the bone frame 14 via the mesh structure 15 by welding with the lower front and rear wires 18 of the mesh structure 15. That's right.

  Each panel 2-5 with respect to the base panel 1 is assembled | attached as it is well-known conventionally. The foldable box-type pallet assembled in this way uses the left and right side panels 2 and 3 of the lower pallet and the four legs 12 (fitting portions 12a) of the upper pallet as described above. The pallets that are stacked or folded so that the panels 2 to 5 are stacked on the base panel 1 are provided with four folding pallet stacking support portions 13 (each leg) protruding upward from the base panel 1 of the lower pallet. 12 and the four legs 12 (fitting portions 12a) of the upper pallet can be stacked.

  Note that the base panel according to the present invention is not only applicable to the foldable pallet as shown in the above embodiment, but the pallet for carrying cargo that each panel standing around the base panel cannot fold, and the base Each of the panels erected around the panel can be folded, but the pallet for pallet stacking has a structure that does not have the folding pallet stacking support portion 13, and for other plate-shaped loads that do not have the panel erected around the base panel It can also be used for pallets. Furthermore, the structure of each leg 12 and the mesh structure 15 are not limited to those shown in the above embodiment. For example, as shown in Patent Document 1, the leg body may be arranged so as to overlap with the T-shaped intersection of the depth member and one gap member in plan view, or the mesh structure may be It may be one that overlaps the entire area of the bone frame 14 including the depth members 16a and 16b.

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 base panel of a pallet. It is a top view explaining the structure of the base panel provided with the leg body, Comprising: The right half is a top view (a partial expanded cross-sectional view is included) which shows the state which excluded the mesh structure. Fig. A is a side view showing the leg portion of the base panel from the outside, and Fig. B is a vertical side view showing the leg portion of the base panel from the inside. FIG. 4B is a front view of FIG. 4A. FIG. 4B is a partially cutaway plan view of FIG. 4A. It is a perspective view of the leg body in which the support part for folding pallet stacking was provided continuously. FIG. 6 is an enlarged vertical sectional view of a main part of FIG. 5. It is a perspective view of the principal part which shows the structural member of the bone frame of a base panel in an exploded state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base panel 2, 3 Left and right both sides panel 4 Back panel 5 Door panel 12 Leg 12a Fitting part 12b Grounding part 13 Folding pallet stacking support part 14 Base panel frame 15 Base panel mesh structure 16a, 16b Bone Frame depth members 17a to 17e Bone frame opening material 18, 19 Mesh structure wire rods 25a, 25b A set of two slits (fitting portion)
27a, 27b A pair of tongue pieces (fitting part)
28 Planar U-shaped columnar member 28d Depth material support surface 29 Vertical member 30 Leg base plate material 34 Projection of columnar member

Claims (3)

Legs are arranged at both front and rear ends of the left and right sides of the base panel, and the base panel is composed of a depth material in the front-rear direction of the left and right sides and a plurality of frontage members laid between the depth materials. A method of manufacturing a base panel for a load carrying pallet comprising a bone frame and a mesh structure laid on the bone frame and constituting a load supporting surface, and fitted to both ends of each frontage material of the bone frame In addition, the two depth members are provided with fitted portions to which the fitting portions can be fitted to a certain depth, and both the depth materials and the frontage materials are fitted to the fitting portions of the two depth materials. Are assembled so that the distance between the two depth members is regulated by the length of each frontage member, and in this state, four legs are connected to the legs in plan view. by welding to the adjoining or overlapping frontage material and depth material, or overlapping or adjacent each leg The mouth member and the both depth material connecting integrated via the respective leg, but intermediate frontage member disposed between the front and rear legs will produce bone frame not weld the depth material, the bone frame A base panel manufacturing method for a load carrying pallet, characterized in that a mesh structure disposed above is welded to at least each frontage. Each of the front members of the bone frame has a cross-sectional groove shape having parallel both side plates along the length direction, and the fitting portion includes a pair of tongue pieces extending integrally from the parallel side plates. The base part manufacturing method of the pallet for cargo transportation according to claim 1 , wherein the fitted portion of the depth member is configured by a pair of slits into which the pair of tongue pieces are inserted. As the frame material of the bone frame, four front materials arranged at two front and rear ends of the base panel and at least one intermediate front material are arranged, and each leg is provided with the front and rear of the base panel. Protruding portions that are fitted upwards between the front and rear two front members arranged at both ends and are in contact with the front and rear two front members and the depth member are provided , and at least the projecting portions of the respective leg bodies are projected. The base panel manufacturing method for a load carrying pallet according to claim 1 , wherein welding is performed to two front and rear gap members and a depth member in contact with the portion.

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