JP4540534B2 - Box pallet - Google Patents

Description

  The present invention relates to a so-called foldable box pallet in which four side walls are formed so as to surround the upper surface of the pallet and each side wall can be folded so as to overlap the pallet. .

  Conventionally, as an example, Patent Document 1 discloses a box pallet configured so that a side wall in a state where the side wall is tilted so as to overlap with the pallet is set substantially vertically.

JP-A-7-89546

  In the conventional box pallet, when a load is applied to the side wall from the outside in a state where the side wall is set up substantially vertically, the load is applied only to the shaft constituting the hinge connecting portion between the side wall and the pallet, and the shaft is There was a problem of deformation or damage.

  In addition, in a state where the side wall is tilted in a substantially horizontal state so as to overlap the pallet, there has been a problem that the side wall moves up and down due to external force and vibration and flutters.

  An object of the present invention is to solve the problems of the above-described conventional box pallet.

In order to achieve the above-described object, the present invention provides a box pallet in which side walls disposed so as to surround the pallet can be folded so as to overlap the pallet. A locking projection is provided at the lower end of the male hinge portion formed on the opposite side wall that is tilted in the direction, and the side wall is substantially on the bottom plate of the female hinge portion formed on the lower bank of the upper deck. A contact ridge is formed to contact the locking ridge when standing upright, and a through hole is formed in the inner wall of the female hinge formed on the lower bank of the upper deck. When the opposing side wall that is first tilted in the pallet direction from the substantially vertically standing state is tilted so as to overlap the upper deck, the locking protrusion protruding from the male hinge portion is provided. Is in contact with or in contact with the upper edge forming the through hole. It is obtained by construction so as to lie.

  A locking ridge protrudes from the lower end of the male hinge portion formed on the opposite side wall that is tilted in the pallet direction from the state where it is erected substantially vertically, and the female formed on the lower bank of the upper deck. The bottom plate of the hinge portion is provided with an abutting ridge that abuts the locking ridge when the side wall is erected substantially vertically, so that a load is applied from the outside to the side wall that is erected substantially vertically. When applied, the load can be borne by the locking ridge and the contact ridge, so that the load applied to the male hinge portion is reduced, so that the male hinge portion may be deformed or damaged. This can prevent anything.

  A through-hole is formed in the back wall of the female hinge part formed on the lower bank of the upper deck, and when the side wall is tilted so as to overlap the upper deck, the locking protrusion protruding from the male hinge part Since the strip is configured to be in contact with or close to the upper edge forming the through hole, the side wall in the collapsed state is not lifted, and the side wall in the collapsed state is not Shaking can be prevented.

  First, the overall configuration of the box pallet of the present invention will be described with reference to FIGS.

  The box pallet has an upper deck 1a, a lower deck 1b, and a girder 1c that connects the upper deck 1a and the lower deck 1b, and a fork insertion opening 1d is formed between the girders 1c. . In this embodiment, as an example, the beam 1c includes four corner beams 1c1 connecting the corners of the upper deck 1a and the lower deck 1b, and an upper deck 1a and a lower deck 1b positioned between the corner beams 1c1. An example is shown in which four intermediate girders 1c2 to be connected and one central girder 1c3 to connect the central portions of the upper deck 1a and the lower deck 1b are shown.

  A lower bank 2 is erected on one opposite side of the upper deck 1a, and a height higher than that of the lower bank 2 is provided on the other opposite side of the upper deck 1a. Department bank 3 is erected. Both ends of the high bank 3 extend in the direction of the low bank 2 and are formed with vertical end extensions 4 at the same height as the high bank 3. The fitting recess 4a is formed so that the lower bank 2 side is opened.

  An appropriate number of female hinge portions H1 are formed on the lower bank 2, and as shown in FIG. 4, the female hinge portion H1 is located on the inner surface of the lower bank 2 (inside the box pallet). A rear wall h1 parallel to and substantially perpendicular to 2a, a side wall h2 and a bottom plate h3 which are substantially perpendicular to the rear wall h1, and an opening h4 is formed in a portion facing the rear wall h1. ing. Further, a vertical fitting groove h2a is formed in each of the opposite side walls h2, and furthermore, the bottom plate h3 located on the inner surface 2a side of the lower bank 2 is in contact with the inner surface 2a in parallel. A protrusion h3a is provided to protrude. Furthermore, a rectangular through hole h1a is formed in the lower part of the back wall h1. In the present embodiment, as an example, an example in which six female hinge portions H1 are formed is shown.

  A female hinge part H2 similar to the female hinge part H1 described above is formed in the vicinity of both ends of the high bank 3 and the female hinge part H2 is also formed on the substantially vertical back wall h1 and the back wall h1. It has a vertical opposing side wall h2 and a bottom plate h3, and an opening h4 is formed in a portion facing the back wall h1. Further, a vertical fitting groove h2a is formed in the opposite side wall h2. The female hinge portion H2 differs from the female hinge portion H1 formed on the low bank 2 in the depth (distance from the upper surface of the low bank 2 or the high bank 3 to the bottom plate h3) and the bottom plate. The contact ridge h3a projecting from h3 and the through hole h1a formed in the back wall h1 are not formed.

  A fitting space portion C1 is formed in the high portion bank 3 located between the female hinge portions H2 formed near both ends of the high portion bank 3, and the fitting space portion C1 is shown in FIG. As shown, the inner wall (the surface located on the inner side of the box pallet) 3a of the high bank 3 is parallel to the substantially vertical wall c1 and the opposite side wall c2 and the bottom plate c3 substantially perpendicular to the deep wall c1. The inner wall 3a of the partial bank 3 has an inner wall c4 that is substantially flush and has a predetermined height. Further, an opening c5 defined by the opposing side wall c2 and the inner wall c4 is formed in a portion facing the back wall h1. A fitting recess C1 'formed by the side wall c2, the bottom plate c3, and the inner wall c4 facing the back wall c1 is formed in the lower part of the fitting space C1. In this embodiment, as an example, an example in which two female hinge portions H2 and two fitting space portions C1 are formed is shown.

  As shown in FIG. 3, the rear surface 1b1 of the lower deck 1b of the box pallet is formed with a substantially rectangular fitting protrusion 5 located inside the lower deck 1b. Is formed of a peripheral wall 5a and a bottom surface 5b. Further, on the peripheral wall 5a of the fitting protrusion 5 located in the vicinity of the four intermediate girders 1c2, the fitting protrusion 5 is extended to the outer surface 1c2 'in the direction of the outer surface 1c2' of the intermediate girder 1c2. Two substantially rectangular auxiliary projections 6 are formed.

  Further, a pair of fitting projections 7 are provided at the center of the upper surface 2b of the lower bank 2 formed on the upper deck 1a at a predetermined interval, and are formed on the upper deck 1a. A fitting recess 8 is formed at the center of the upper surface 3 b of the raised bank 3.

  Next, using FIGS. 6 to 9, of the side walls constituting the box pallet, the opposed side walls (hereinafter simply referred to as “below”) that are first tilted so as to overlap the upper deck 1 a from the vertically standing state. (Referred to as a pre-tilt side wall).

  The pre-tilt side wall 10 is formed at a substantially square plate portion 10a, an upper end flange 10b formed at the upper end of the outer surface (surface located outside the box pallet) 10a ′ of the plate portion 10a, and a lower end of the plate portion 10a. The lower end flange 10c and the opposite side end flanges 10d formed at the left and right ends of the plate portion 10a are provided.

  On the outside of the side end flange 10d of the pre-tilt side wall 10, a vertically long strip-shaped male frame portion 10e is formed by extending the plate portion 10a while leaving the lower portion of the side end flange 10d. An appropriate number of plate-like fitting protrusions 10e1 are formed along the vertical end on the outer surface near the vertical end of the frame portion 10e (the surface located outside the box pallet). In the present embodiment, as an example, an example in which four fitting protrusions 10e1 are formed is shown.

  Further, the outer surface of the side end flange 10d of the pre-tilt side wall 10 located below the male frame portion 10e (a surface positioned substantially perpendicular to the plate portion 10a and opposite to the plate portion 10a). A box-shaped lifting prevention block 10f that is substantially perpendicular to the outer surface 10d1 of the side end flange 10d protrudes from 10d1. The lifting prevention block 10f is configured to be fitted into the fitting recess 4a of the end extension 4 formed on the upper deck 1a described above when the pre-tilt side wall 10 is erected.

  Further, the auxiliary protrusion 6 formed on the back surface of the lower deck 1b described above is fitted into the substantially central portion of the upper end flange 10b of the preceding inclined side wall 10 by denting the upper end flange 10b downward. A recess 10g is formed. The fitting recess 10g is formed in a substantially inverted trapezoidal shape from opposing inclined side portions 10g1 and a bottom portion 10g2 extending in directions away from each other. As will be described later, the length of the bottom portion 10g2 is an auxiliary protrusion. It is formed substantially the same as the length of the portion 6 (the length along the peripheral wall 5a of the fitting protrusion 5).

  Furthermore, on the back surface of the lower end flange 10c, as shown in FIG. 7, a male hinge portion H1 ′ is formed corresponding to the female hinge portion H1 formed on the lower bank 2 described above. . The male hinge portion H1 ′ has a fitting base h5 that is perpendicular to the back surface of the lower end flange 10c and can be inserted into the opening h4 of the female hinge portion H1, and the fitting base h5 is semicircular. A plurality of strip-shaped plate portions h5a having a tip portion h5a ′ having a shape, and a connecting plate portion formed by extending the plate portion 10a of the preceding inclined side wall 10 to the semicircular tip portion h5a ′ of the strip-shaped plate portion h5a. h5b. Further, a short shaft h5c that is fitted into a fitting groove h2a formed on the opposite side wall h2 of the female hinge part H1 is projected from the lower end part of the strip-like plate part h5a located on the outer side. A locking protrusion h5d protrudes along the length direction of the lower end flange 10c at the lower end of the semicircular tip portion h5a ′ of the strip-shaped plate portion h5a.

  As shown in FIGS. 8 and 9, a side end flange 10 d and a side end flange are disposed in the vicinity of the opposite upper corners of the outer surface 10 a ′ of the substantially rectangular plate portion 10 a constituting the leading inclined side wall 10. It is surrounded by an end-side vertical rib 10h parallel to 10d, an upper horizontal rib 10i parallel to the upper end flange 10b, and a lower horizontal rib 10j located below the upper horizontal rib 10i and parallel to the upper horizontal rib 10i. Lock member insertion spaces A1 are respectively formed.

  By forming a pair of horizontal slits s1 and a vertical slit s2 connecting the ends of the pair of horizontal slits s1 on the side end flange 10d side in the plate portion 10a located in the lock member insertion space A1, the lock member is inserted. An elastic tongue piece 11 (hereinafter referred to as an elastic tongue piece for preventing the lock member from falling off) 11 is formed to prevent a lock member, which will be described later, disposed in the space A1 from dropping out of the lock member insertion space A1. On the outer surface of the free end of the elastic tongue 11 for preventing the lock member from falling off (the surface located outside the box pallet), the surface located on the side end flange 10d side is a vertical surface 11a substantially parallel to the side end flange 10d. And a protrusion 11a having two inclined surfaces 11a "inclined downward toward the elastic tongue 11 for preventing the lock member from falling off.

  A reinforcing block 12 is connected to the side end flange 10d located in the lock member insertion space A1, and a vertically long lock portion insertion through hole s3 is formed in the side end flange 10d and the reinforcing block 12. Yes. In addition, on the back surface of the upper horizontal rib 10i and the upper surface of the lower horizontal rib 10j located in the lock member insertion space A1, guide ridges 13 are formed so as to face each other and parallel to the plate portion 10a. Further, by forming a cut recess 10d3 in the inner surface s3a positioned on the distal end side of the side end flange 10d among the inner surfaces forming the lock portion insertion through hole s3, the inner surface s3a has a substantially same shape as the side end flange 10d. Parallel locking surfaces 10d3 'are formed. The inner surface s3b facing the inner surface s3a in which the cut recess 10d3 is formed (the inner surface located on the plate portion 10a side and parallel to the plate portion 10a) s3b is parallel to the plate portion 10a with a predetermined interval. Guide ridges 14 are formed.

  A holding member L of the lock member U described later is formed by the elastic tongue piece 11 for preventing the lock member from dropping, the guide protrusion 13, the lock portion insertion through hole s3, and the like described above.

  Next, the lock member U disposed in the lock member insertion space A1 will be described with reference to FIGS.

  The lock member U has a rectangular tube portion u1 formed in a substantially rectangular tube shape by a vertically long rectangular vertical sidewall u1a and a horizontal wall u1b facing each other, and the middle of the rectangular tube portion u1. And a partition wall u1 ′. Further, one vertical side wall u1a of the opposing vertical side walls u1a forming the rectangular tube portion u1 has a substantially thick plate-like lock portion u2 which is perpendicular to the vertical side wall u1a and along the vertical direction of the vertical side wall u1a. Is formed. In addition, the other vertical side wall u1a of the opposing vertical side wall u1a that forms the rectangular tube portion u1 is detached from the lock member formed in the plate portion 10a located in the lock member insertion space A1 of the preceding inclined side wall 10 described above. A notch u3 through which the protrusion 11a of the preventing elastic tongue 11 can pass is formed. Further, an elastic tongue piece u4 is formed by forming a pair of horizontal slits s4 and a vertical slit s5 connecting the ends of the pair of horizontal slits s4 located on the distal end side of the lock part u2 in the lock part u2. A locking projection u4a projects from the free end of the elastic tongue piece u4. Furthermore, horizontal protruding pieces u5 project from the opposing horizontal side walls u1b forming the rectangular tube portion u1 along the lock portion u2. Still further, the back surface of the lock portion u2 (the surface facing the plate portion 10a of the preceding tilted sidewall 10 when the lock member U is disposed in the lock member insertion space A1 of the preceding tilted sidewall 10) has a pair of A fitting horizontal groove u2a is formed. Note that u6 is a reinforcing horizontal rib that connects the vertical side wall u1a where the notch u3 is formed and the vertical side wall u1a where the notch u3 is not formed, and the reinforcing horizontal rib u6 is the notch u3. It is configured not to project inside. It should be noted that an appropriate number of horizontal grooves u2b similar to the above-described fitting horizontal grooves and substantially parallel to the fitting horizontal grooves u2a may be formed on both surfaces of the lock portion u2 as necessary. it can.

  Next, attachment of the above-described lock member U to the preceding inclined side wall 10 will be described with reference to FIGS.

  The locking protrusion u4a of the elastic tongue piece u4 constituting the lock member U is located on the front side (opposite side to the plate portion 10a of the preceding inclined side wall 10), and is a notch formed in the vertical side wall u1a. The lock member U is disposed in the lock member insertion space A1 formed in the preceding tilted side wall 10 so that u3 is located on the back side (side facing the plate portion 10a of the preceding tilted side wall 10). Thus, when the lock member U is disposed in the lock member insertion space A1 formed in the preceding tilted side wall 10, the tip of the lock portion u2 of the lock member U is formed in the preceding tilted side wall 10. A vertical side wall u1a which is located near the opening on the lock member insertion space A1 side of the lock portion insertion through hole s3 formed in the side end flange 10d and the reinforcing block 12 and in which the notch portion u3 is not formed is locked. It is comprised so that it may be located in the edge part side vertical rib 10h side from the latching protrusion u4a of the elastic tongue piece u4 which comprises the member U. FIG. This state is shown in FIGS.

  Next, the lock member U is inserted into the side end flange 10d of the pre-tilt side wall 10 and the lock portion insertion through hole s3 formed in the reinforcing block 12 so that the lock member U2 is inserted into the side end flange 10d. Move in the flange 10d direction. In the process of moving the lock member U in the direction of the side end flange 10d, the horizontal protrusions u5 formed on the opposite horizontal side wall u1b of the lock member U are connected to the back and bottom surfaces of the upper horizontal rib 10i of the preceding inclined side wall 10. It is configured so as to be positioned on the back side of the guide ridge 13 formed on the upper surface of the horizontal rib 10 j and close to the guide ridge 13. Further, in the process of moving the lock member U in the direction of the side flange 10d, a vertical side wall u1a in which the notch u3 of the lock member U is not formed is formed in the plate portion 10a located in the lock member insertion space A1. The lock member falling-off preventing elastic tongue 11 is brought into contact with the protruding portion 11a, and the lock member falling-off preventing elastic tongue 11 is elastically deformed in a direction away from the lock member U. When the vertical side wall u1a in which the part u3 is not formed moves along the inclined surface 11a ″ of the protrusion 11a and exceeds the protrusion 11a, the elastic tongue 11 for preventing the lock member from dropping is elastic. By returning to the original position substantially flush with the plate portion 10a by the elastic restoring force resulting from the deformation, the inner surface (substantially rectangular tube-like shape) of the vertical side wall u1a where the notch portion u3 is not formed. The surface u1a ′ located on the inner side of the body U1 is configured so as to be positioned close to the substantially vertical tip end surface 11a ′ of the protrusion 11a of the elastic tongue 11 for preventing the lock member from falling off. When the lock part u2 of the lock member U is inserted into the side end flange 10d of the pre-tilt side wall 10 and the lock part insertion through hole s3 formed in the reinforcing block 12, a pair formed in the lock part u2 In the fitting horizontal groove u2a, the guide protrusion 14 protruding from the side end flange 10d of the pretilt side wall 10 and the inner surface s3b of the lock portion insertion through hole s3 formed in the reinforcing block 12 is inserted. It is comprised so that.

  As described above, the lock portion u2 of the lock member U is inserted into the side end flange 10d of the pre-tilt side wall 10 and the lock portion insertion through hole s3 formed in the reinforcing block 12, and the notch portion of the lock member U is inserted. The inner surface u1a ′ of the vertical side wall u1a on which u3 is not formed is a substantially vertical tip end surface of the protrusion 11a of the elastic member 11 for preventing the lock member falling off formed on the plate portion 10a located in the lock member insertion space A1. In the state of being in contact with or close to 11a ′, as shown in FIG. 14, the distal end of the lock portion u2 of the lock member U exceeds the side end flange 10d and is outside (male type). The frame portion 10e side) is configured not to protrude. It should be noted that an appropriate number of fitting protrusions 10e1 formed on the male frame portion 10e of the pre-tilt side wall 10 do not interfere with the lock portion u2 of the lock member U protruding outward from the lock portion insertion through hole s3. It is not formed near the lock portion insertion through hole s3.

  Next, using FIG. 15 and FIG. 16, from the side wall that constitutes the box pallet, from the vertically standing state, first, to the opposite leading inclined side wall 10 that is tilted so as to overlap the upper deck 1 a. A side wall 20 that is tilted in the direction of the upper deck 1a (hereinafter simply referred to as a trailing tilt side wall) 20 will be described.

  The rearwardly inclined side wall 20 having a substantially U-shaped front surface has opposing vertical side wall portions 20a arranged at a predetermined interval and a lower horizontal side wall portion 20b connecting the lower portions of the vertical side wall portions 20a. A door fitting recess A2 is formed by the opposing vertical side wall portion 20a and the lower horizontal side wall portion 20b.

  A vertical strip-shaped female frame portion 20c substantially perpendicular to the vertical side wall portion 20a is formed at a vertical end located on the opposite side to the door fitting recess A2 of the vertical side wall portion 20a, and a pair of female dies are formed. A fitting protrusion formed on the male frame portion 10e of the above-described pre-tilt side wall 10 on the opposing surface of the frame portion 20c (a surface substantially perpendicular to the plate portion 20a1 forming the vertical side wall portion 20a). A fitting recess 20c1 into which 10e1 is fitted is formed, and the leading end surface of the female frame portion 20c (a surface substantially parallel to the plate portion 20a1 forming the vertical side wall portion 20a) is preceded by the above-described precedent. A lock portion fitting recess 20c2 into which the lock portion u2 of the lock member U disposed on the inclined side wall 10 is fitted is formed.

  Further, an upper horizontal rib 20e1 positioned below the upper end flange 20d formed on the upper end of the outer surface (surface located outside the box pallet) 20a1 ′ of the plate portion 20a1 forming the vertical side wall portion 20a, and the vertical side wall portion 20a. A vertical flange 20f formed at the vertical edge of the door fitting recess A2 side, a female frame portion side vertical rib 20g parallel to the vertical flange 20f and formed on the female frame portion 20c side, and an upper horizontal A lock member insertion space A3 similar to the lock member insertion space A1 described above, which is positioned below the rib 20e1 and surrounded by the lower horizontal rib 20e2 parallel to the upper horizontal rib 20e1, is formed in the vertical side wall portion 20a. Yes.

  Also in the lock member insertion space A3 formed in the vertical side wall portion 20a described above, the elastic tongue piece 11 for preventing the lock member from falling off, the guide protrusion 13 and the lock portion insertion through hole s3 formed in the preceding tilted side wall 10 described above. A holding member L of the lock member U made of, for example, is formed. Also in the door fitting recess A3 of the vertical side wall portion 20a, the lock member U is disposed by the same attachment means as the lock member U to the lock member insertion space A1. The lock portion insertion through hole s3 is formed in the vertical flange 20f and the reinforcing block 12 connected to the vertical flange 20f.

  By extending the plate portion 20a1 of the vertical side wall portion 20a constituting the trailing inclined side wall 20 beyond the vertical flange 20f and into the door fitting recess A2, a vertically long female frame portion 20h is formed. An appropriate number of fitting recesses 20h1 are formed on the outer surface (surface located outside the box pallet) 20h ′ of the female frame portion 20h. In the present embodiment, an example in which three fitting recesses 20h1 are formed is shown as an example.

  Further, in the vicinity of both end portions of the back surface of the lower end flange 20b1 of the lower horizontal side wall portion 20b constituting the trailing inclined side wall portion 20, corresponding to the female hinge portions H2 formed in the vicinity of both end portions of the high bank 3 described above. A male hinge portion H2 ′ including a fitting base h5, a short axis h5c, and the like similar to the male hinge portion H1 ′ formed on the back surface of the lower end flange 10c of the preceding inclined side wall 10 is formed.

  Further, an appropriate number of thick plate-like fitting blocks E are suspended from the back surface of the lower end flange 20b1 of the lower horizontal side wall portion 20b located between the male hinge portions H2 'described above. The fitting block E is configured to be fitted into a fitting space C1 formed in the high bank 3, and is formed at the lower end of the fitting space C1 at the tip of the fitting block E. A fitting tip E ′ to be fitted into the fitted recess C1 ′ is formed. The inner surface (surface located inside the box pallet) e1 other than the fitting tip E ′ is substantially flush with the inner surface (surface located inside the box pallet) 20b2 of the lower horizontal side wall 20b. In addition, by forming a step e2 at the boundary between the inner surface e1 of the fitting block E other than the fitting tip E 'and the fitting tip E', the fitting tip E 'is thin. Is formed. As will be described later, when the trailing inclined side wall 20 is tilted in the direction of the upper deck 1a, the fitting block E is inserted into the opening c5 of the fitting space C1 formed in the high bank 3. It is configured to be.

  A concave portion 20i is formed at a predetermined interval on the upper flange 20b3 side of the lower horizontal side wall portion 20b constituting the trailing inclined side wall 20, and a hinge is provided between the opposite side walls 20i1 forming the concave portion 20i. The shaft 20j is cross-linked. In this embodiment, as an example, an example in which three recesses 20i are formed is shown.

  Further, by fitting the inner surface 20b2 located in the vicinity of the hinge shaft 20j, out of the inner surface 20b2 of the lower horizontal side wall portion 20b constituting the trailing inclined side wall 20, the front shape is fitted into a substantially inverted trapezoidal shape. A depression 20k is formed. The substantially inverted trapezoidal fitting recess 20k is formed of an opposing inclined surface 20k2 that is opposed to the rear wall surface 20k1 and that is inclined away from each other as it goes upward, and a bottom surface 20k3. Furthermore, by forming the fitting depression 20k as described above, a substantially trapezoid fitting fitting 20m is formed on the inner surface 20b2 of the lower horizontal side wall 20b located between the fitting depressions 20k. Yes. In the present embodiment, since three substantially inverted trapezoidal fitting recesses 20k are formed, two substantially trapezoidal fitting protrusions 20m are formed.

  Next, the door D fitted in the door fitting recessed part A2 formed in the backward inclined side wall 20 will be described with reference to FIGS. 17 and 18.

  The door D has a substantially square plate portion d1, and an upper end flange d2 is formed at the upper end of the outer surface (surface located outside the box pallet) d1 ′ of the plate portion d1, and the plate portion A lower end flange d3 is formed at the lower end of the outer surface d1 ′ of d1, and opposed side end flanges d4 are formed at the left and right ends of the outer surface d1 ′ of the plate part d1.

  The door D is formed with an elongated strip-shaped male frame portion d5 by extending the plate portion d1, and is located on the inner surface near the vertical end of the male frame portion d5 (located inside the box pallet). A suitable number of plate-like fitting protrusions d5a are formed on the surface) along the vertical ends. In this embodiment, as an example, an example in which three fitting protrusions d5a are formed is shown. Further, an end side surface (a surface perpendicular to the plate portion d1) d5b of the male frame portion d5 is disposed in a lock member insertion space A3 formed in the vertical side wall portion 20a constituting the trailing tilt side wall 20. A lock portion fitting recess d6 into which the tip of the lock portion u2 of the lock member U is inserted is formed.

  Further, the lower end flange d3 of the door D is formed with a recess d7 at a predetermined interval, and the hinge shaft d8 is bridged between the opposite side walls d7a forming the recess d7. In the present embodiment, an example in which three concave portions d7 are formed is shown as an example. The hinge shaft d8 is formed to have the same length and the same diameter as the hinge shaft 20j formed on the trailing inclined side wall 20 described above.

  Furthermore, on the back surface of the lower end flange d3 of the door D, a fitting protrusion d9 having a substantially inverted trapezoidal shape is provided so as to straddle the above-described recess d7. Still further, a wide recess d10 into which the auxiliary protrusion 6 formed on the back surface of the lower deck 1b is inserted is formed at the center of the upper end flange d2 of the door D. The wide concave portion d10 is formed of opposed inclined side portions d10a and a bottom portion d10b extending in directions away from each other, and the width W1 of the bottom portion d10b is equal to the width of the auxiliary projection 6 (the peripheral wall of the fitting projection 5). (Length along 5a) is wider than W2 and is preferably more than twice as wide. As described above, a substantially trapezoidal fitting recess d11 is formed between the substantially inverted trapezoidal fitting protrusions d9 by forming the substantially inverted trapezoidal fitting protrusions d9. The present embodiment shows an example in which three substantially inverted trapezoidal fitting protrusions d9 are vertically provided, and therefore, the approximate formed between the generally inverted trapezoidal fitting protrusions d9. Two trapezoidal fitting recesses d11 are formed.

  The interval W3 between the lower ends of the substantially trapezoidal fitting recesses d11 described above is the width of the upper end of the substantially trapezoidal fitting protrusion 20m formed on the inner surface 20b2 of the lower horizontal side wall 20b constituting the trailing inclined side wall 20. The width W3 ′ of the upper end of the substantially trapezoidal fitting recess d11 is formed substantially the same as the width W4 of the upper end of the substantially trapezoidal fitting protrusion 20m. The lower end interval W3 of the substantially trapezoidal fitting recess d11 is formed to be substantially the same as the width W4 ′ of the lower end of the substantially trapezoidal fitting protrusion 20m.

  Further, an interval W5 between the upper ends of the substantially inverted trapezoidal fitting recesses 20k formed on the inner surface 20b2 of the lower horizontal side wall 20b constituting the trailing inclined side wall 20 is formed on the back surface of the lower end flange d3 of the door D. The substantially inverted trapezoidal fitting protrusion d9 is formed wider than the lower end width W6, and the interval W5 ′ between the lower ends of the substantially inverted trapezoidal fitting recess 20k is substantially inverted trapezoidal fitting protrusion. The width W6 of the upper end of the substantially inverted trapezoidal fitting recess 20k is set to be approximately the same as the width W6 of the lower end of the piece d9. It is formed almost the same as'.

  Next, the connecting member N for attaching the door D to the door fitting recess A2 formed in the trailing inclined side wall 20 will be described with reference to FIGS. 19 and 20.

  The connecting member N is formed of a pair of box-shaped halves N ′ having the same configuration, and the halved portion N ′ has a substantially rectangular substrate n1 and a peripheral substantially perpendicular to the substrate n1. The peripheral side wall n2 is comprised from the opposing long side part n2a and the opposing short side part n2b. In addition, a long side partition wall n3 having the same height as the peripheral side wall n2 is formed in the halved portion N ′ so as to bisect the halved portion N ′ along the long side portion n2a. A short side partition wall n4 having the same height as the peripheral side wall n2 is formed along the short side part n2b so as to divide the half part N ′ into two equal parts. By forming such a long side partition wall n3 and a short side partition wall n4, the halved portion N 'is partitioned into four compartments n5a, n5b, n5c, and n5d.

  A pair of compartments n5b located on one diagonal line and a substrate n1 located in the compartment n5c are opposed to each other at a predetermined interval and substantially parallel to the short side portion n2b and the short side partition wall n4. The thick plate-shaped bearing portion n6 is erected, and the bearing portion n6 is connected to the long side portion n2a and the long side partition wall n3. Further, the distance between the pair of bearing portions n6 facing each other is substantially the same as the diameter of the hinge shaft d8 formed on the door D and the hinge shaft 20j formed on the trailing inclined side wall 20 described above. At the same time, the height of the bearing portion n6 (height from the upper surface of the substrate n1) is formed approximately twice the height of the peripheral side wall n2 (height from the upper surface of the substrate n1). Further, a locking through hole n6a is formed in the lower part of the pair of opposing bearing parts n6, and the long side part n2a and the long side partition wall n3 located between the pair of opposing bearing parts n6 A semicircular recess n7 into which approximately half of the hinge shafts d8 and 20j are fitted is formed.

  The compartment n5a located on the other diagonal line and the substrate n1 located in the compartment n5d are substantially parallel to the short side portion n2b and the short side partition wall n4 with a predetermined distance therebetween. A pair of elastically deformable thick plate-like elastic locking portions n8 are provided upright, and locking protrusions n8a are provided projecting from upper ends of opposing side surfaces of the pair of opposing elastic locking portions n8. Yes. The elastic locking part n8 is not connected to the long side part n2a and the long side partition wall n3, and the elastic locking part n8 and the long side part n2a and the elastic locking part n8 and the long side partition wall n3 are not connected. A gap is formed between them. Moreover, the space | interval of a pair of opposing elastic latching | locking part n8 is formed in the space | interval which can fit the above-mentioned pair of opposing bearing parts n6. In other words, the inner width W7 between the opposing inner walls of the pair of opposing elastic locking portions n8 is substantially the same as the outer width W8 between the opposing inner walls of the pair of opposing bearing portions n6 and the outer wall on the opposite side. Is formed. Furthermore, the center line located between the pair of opposing elastic locking portions n8 is arranged to coincide with the center line located between the pair of opposing bearing portions n6 located across the long side partition wall n3. In addition, the height of the elastic locking portion n8 (height from the upper surface of the substrate n1) is the same as the height of the bearing portion n6 (height from the upper surface of the substrate n1). Note that the plurality (eight) through holes n9 formed in the substrate n1 are die holes formed in order to integrally mold the halved portion N ′ of the connecting member N with synthetic resin. .

  Next, attachment to the door fitting recess A <b> 2 formed on the rearwardly inclined side wall 20 of the door D will be described using the connecting member N composed of the above-described pair of halved portions N ′.

  First, the door D is fitted into a door fitting recess A2 formed in the trailing tilt side wall 20 so as to be substantially flush with the trailing tilt side wall 20. Next, as shown in FIG. 21, below the hinge shaft d8 formed on the door D and the hinge shaft 20j formed on the rearward inclined side wall 20 located at a predetermined interval from the hinge shaft d8. Are inserted so that the short side portion n2b of one half portion N ′ is substantially parallel to the hinge shafts d8 and 20j, and then the hinge shaft d8 on the door D side and the hinge shaft on the trailing tilt side wall 20 side. 20j is fitted between a pair of opposing bearings n6 formed in the compartment n5b and the compartment n5c at the diagonal positions, respectively, and the hinge shaft d8 on the door D side and the trailing tilt side wall 20 The side hinge shaft 20j is fitted into a semicircular recess n7 formed in the opposing long side portion n2a and the long side partition wall n3, respectively.

  Next, the other half portion N ′ is divided into a pair of bearing portions n6 opposed to one half portion N ′ and a pair of elastic locking portions n8 opposed to the other half portion N ′. Are arranged on the hinge shaft d8 on the door D side and the hinge shaft 20j on the trailing tilt side wall 20 side so as to face each other. Thereafter, the hinge shaft d8 on the door D side and the hinge shaft 20j on the trailing inclined side wall 20 side are fitted between a pair of opposing bearing portions n6 formed in the other half portion N ′, and The other half-split portion N ′ is fitted to one half-split portion N so as to fit into the long side portion n2a of one half-split portion N ′ and the semicircular recess n7 formed in the long side partition wall n3. 'Close to. Thus, when the other half part N ′ is brought close to one half part N ′, as shown in FIG. 22, a pair of bearing parts opposed to one half part N ′ n6 is fitted between a pair of opposing elastic locking parts n8 of the other half part N ′ facing the bearing part n6, and a pair of opposing bearing parts n6 is opposed to each other. In the process of fitting between the elastic locking portions n8, the outer wall of the bearing portion n6 contacts the locking projection n8a of the elastic locking portion n8, and the tip ends of the pair of opposing elastic locking portions n8 are mutually connected. It will be elastically deformed in the direction of separating. Further, when the other half portion N ′ is brought closer to the other half portion N ′, the locking protrusion n8a of the elastic locking portion n8 is locked to the lower portion of the bearing portion n6. The elastic locking portion n8 that has reached the through-hole n6a and has been elastically deformed in the direction away from each other moves its tip portions in a direction approaching each other due to the elastic restoring force resulting from the elastic deformation. (In FIG. 23, the hinge shaft d8 on the door D side and the hinge shaft 20j on the trailing inclined side wall 20 side are omitted.) As shown in FIG. 23, the locking protrusion n8a of the elastic locking portion n8. However, it fits into the locking through-hole n6a drilled in the lower part of the bearing part n6. In this way, as shown in FIG. 22 and FIG. 24, the connecting member in which the hinge shaft d8 on the door D side and the hinge shaft 20j on the trailing inclined side wall 20 side are formed of a pair of halves N ′. Therefore, the two shafts of the hinge shaft d8 on the door D side and the hinge shaft 20j on the trailing inclined side wall 20 side are hinge-connected by the connecting member N. Will be formed.

  As described above, when the hinge shaft d8 on the door D side and the hinge shaft 20j on the trailing inclined side wall 20 side are hinge-connected by the connecting member N composed of a pair of halves N ′, one half A pair of bearing parts n6 opposed to the split part N ′ is configured to be fitted and sandwiched between a pair of opposing elastic locking parts n8 of the other half part N ′ facing the bearing part n6. Therefore, even if a load that presses the bearing portion n6 is applied to the hinge shafts d8 and 20j positioned between the pair of opposing bearing portions n6, a pair of elasticity facing the pair of opposing bearing portions n6 Since the load is borne by both the locking portion n8, the bearing portion n6 is deformed or damaged as compared with the case where the hinge shafts d8 and 20j are supported only by the pair of bearing portions n6 facing each other. Can be reliably prevented.

  Further, a pair of bearing portions n6 opposed to one half portion N ′ is fitted and sandwiched between a pair of opposing elastic locking portions n8 of the other half portion N ′ opposed to the bearing portion n6. Since it is comprised so that the shakiness of the hinge axis | shafts d8 and 20j can be suppressed, the opening / closing operation | work of the door D can be performed smoothly.

  Next, attachment of the leading inclined side wall 10 to the low bank 2 and attachment of the trailing inclined side wall 20 to the high bank 3 will be described.

  The fitting base h5 of the male hinge part H1 ′ formed on the back surface of the lower end flange 10c of the pre-tilt side wall 10 is inserted into the female hinge part H1 formed on the lower bank 2 and protruded from the fitting base h5. By fitting the paired short shafts h5c into fitting grooves h2a formed on the opposite side wall h2 of the female hinge part H1, the leading inclined side wall 10 is attached to the lower bank 2.

  Further, the fitting bases h5 of the male hinge part H2 ′ formed near both ends of the back surface of the lower end flange 20b1 of the lower horizontal side wall part 20b constituting the trailing inclined side wall 20 are arranged near both end parts of the high bank 3. The pair of short shafts h5c projecting from the fitting base h5 are fitted into fitting grooves h2a formed on the opposite side walls h2 of the female hinge H2 while being inserted into the formed female hinge H2. Further, the fitting block E formed on the back surface of the lower end flange 20b1 of the rearward inclined side wall 20 has a fitting tip portion E ′ having a fitting recess C1 in the fitting space C1 formed in the high bank 3. The trailing inclined side wall 20 is attached to the high bank 3 by being inserted into the fitting space C1 formed in the high bank 3 so as to be fitted to '.

  When the leading tilt side wall 10 and the trailing tilt side wall 20 are set substantially vertically, the fitting protrusion 10e1 formed on the male frame portion 10e of the leading tilt side wall 10 is formed on the trailing tilt side wall 20. A lifting prevention block 10f that is fitted in the fitting recess 20c1 formed in the female frame portion 20c and that protrudes from the outer surface 10d1 of the side end flange 10d of the preceding inclined side wall 10 is provided on the high bank 3. Are fitted into fitting recesses 4a formed in end extension portions 4 extending at both ends. Thus, the lifting prevention block 10f protruding from the outer surface 10d1 of the side end flange 10d of the pre-tilt side wall 10 is fitted in the fitting recess 4a formed in the end extension 4. Even if an attempt is made to lift the vertically inclined leading side wall 10, the leading inclined side wall 10 is not lifted from the lower bank 2, and an attempt is made to lift the vertically inclined trailing inclined side wall 20. Also, the fitting protrusion 10e1 formed on the male frame portion 10e of the preceding inclined side wall 10 is fitted into the fitting concave portion 20c1 formed on the female frame portion 20c of the trailing inclined side wall 20. Therefore, the trailing inclined side wall 20 does not lift from the high bank 3. Accordingly, it is possible to prevent the vertically inclined leading side wall 10 and the trailing inclined side wall 20 from being lifted from the low bank 2 and the high bank 3.

  Further, when the leading tilt side wall 10 and the trailing tilt side wall 20 are erected substantially vertically, the lock portion u2 of the lock member U disposed on the leading tilt side wall 10 is the female type of the trailing tilt side wall 20. It is comprised so that it may fit in the locking part fitting recessed part 20c2 formed in the frame part 20c. Therefore, the pre-tilt side wall 10 does not fall in the direction of the upper deck 1a.

  As described above, the lock part u2 of the lock member U disposed on the preceding tilt side wall 10 is fitted into the lock part fitting recess 20c2 formed on the female frame part 20c of the subsequent tilt side wall 20. In the locked state, as shown in FIG. 25, the locking projection u4a of the elastic tongue piece u4 formed on the lock portion u2 of the lock member U is formed in the side end flange 10d and the reinforcing block 12. The lock member insertion through-hole s3 is configured to be engaged with the engaging surface 10d3 ′ of the cut recess 10d3 formed in the inner surface s3a. Therefore, the lock member U is simply described above. The lock portion 20c2 is configured not to come out of the lock portion fitting recess 20c2.

  In order to tilt the vertical tilt side wall 10 and the trailing tilt side wall 20 in the vertical state so as to overlap the upper deck 1a, the lock portion u2 of the lock member U disposed on the leading tilt side wall 10 is moved to the rear tilting side wall 20. When the lock member U is discharged from the lock fitting recess 20c2 formed in the female frame portion 20c, the lock member U is moved toward the central portion of the preceding tilted side wall 10 to form the lock portion u2 of the lock member U. The engagement state between the engagement protrusion u4a of the elastic tongue piece u4 thus formed and the engagement surface 10d3 ′ of the cut recess 10d3 formed in the inner surface s3a forming the lock part insertion hole s3 described above is forcibly released. Then, the lock part u2 of the lock member U is discharged from the lock part fitting recess 20c2, and the locked state of the leading tilt side wall 10 and the trailing tilt side wall 20 by the lock member U is released.

  As described above, the lock member U is moved toward the center of the preceding tilted side wall 10, and the lock part u <b> 2 of the lock member U disposed on the preceding tilted side wall 10 is moved to the female mold of the subsequent tilted side wall 20. As shown in FIG. 14, when the locking state between the leading tilt side wall 10 and the trailing tilt side wall 20 is released from the lock portion fitting recess 20 c 2 formed in the portion 20 c and released from the locked state. In addition, the vertical side wall u1a in which the notch u3 of the lock member U is not formed is formed on the protrusion 11a of the elastic tongue piece 11 for preventing the lock member falling off formed on the plate portion 10a located in the lock member insertion space A1. The lock member U is in contact with the vertical surface 11a ′ so that the lock member U does not move further in the direction of the central portion of the preceding inclined side wall 10. Therefore, the lock member U is largely moved toward the central portion of the pre-tilt side wall 10, and the lock portion u2 of the lock member U is moved from the lock portion insertion through hole s3 formed in the side end flange 10d and the reinforcing block 12. It is possible to prevent the lock member U from coming off and coming out of the lock member insertion space A1.

  Further, when the pre-tilt side wall 10 is erected substantially vertically, as shown in FIG. 26, the lower end of the semicircular tip portion h5a ′ of the strip-shaped plate portion h5a constituting the female hinge portion H1. The locking ridge h5d projecting from the vertical wall h3a ′ on the back wall h1 side of the abutment ridge h3a formed on the bottom plate h3 located on the inner surface 2a side of the lower bank 2 (shown in FIG. 4). It is comprised so that it may contact | abut. Therefore, when a load is applied from the outside to the pre-tilt side wall 10 in the state of being set up substantially vertically, the load is brought into contact with the vertical surface h3a ′ on the back wall h1 side of the contact protrusion h3a. Since it can be borne by the locking ridge h5d, there is a load applied to the short axis h5c of the male hinge part H1 ′ fitted in the fitting groove h2a formed in the opposite side wall h2 of the female hinge part H1. Therefore, it is possible to prevent the short axis h5c from being deformed or damaged.

  In a state where the door fitting recess A2 of the rearwardly inclined side wall 20 standing substantially vertically is closed by the door D, it is formed on the back surface of the lower end flange d3 of the door D as shown in FIG. The substantially inverted trapezoidal fitting protrusion d9 thus formed is fitted into a substantially inverted trapezoidal fitting recess 20k formed on the inner surface 20b2 of the lower horizontal side wall 20b constituting the trailing inclined side wall 20. Therefore, when a load is applied to the door D from the inside, the load is applied to the substantially inverted trapezoidal fitting recess 20k and the approximately inverted platform fitted to the fitting recess 20k. Since the load can be borne by the fitting protrusion d9 having the shape, the load applied to the hinge shaft d8 on the door D side and the hinge shaft 20j on the trailing tilt side wall 20 side is reduced, and therefore the hinge shaft on the door D side is reduced. d8 and the hinge shaft 20j on the trailing inclined side wall 20 side may be deformed or damaged. It is possible to prevent, it is possible to prevent rattling of the door D. Further, when the door fitting recess A2 of the rearward tilting side wall 20 standing substantially vertically is closed by the door D, it is formed on the inner surface 20b2 of the lower horizontal side wall portion 20b of the rearward tilting side wall 20. Since the substantially trapezoidal fitting protrusion 20m is configured to be fitted in a substantially trapezoidal fitting recess d11 formed between the substantially inverted trapezoidal fitting protrusions d9 of the door D, Shaking of the door D can be prevented more reliably.

  In a state where the leading tilting side wall 10 and the trailing tilting side wall 20 are set substantially vertically, the leading tilting side wall 10 and the trailing tilting side wall 20 are fitted into the door fitting recess A2 formed in the trailing tilting side wall 20 to close the door fitting recess A2. In order to tilt the door D forward and open the door fitting recess A2, the locking member U disposed in the locking member insertion space A3 formed in the opposing vertical side wall portion 20a of the trailing tilt side wall 20 is moved. Then, after moving away from the door D, the lock part u2 of the lock member U is ejected from the lock part fitting recess d6 where the male frame part d5 of the door D is formed, and then the door D is moved. The door fitting recess A2 is opened by pivoting forward about the hinge shaft d8 on the door D side and the hinge shaft 20j on the trailing tilt side wall 20 side hinged by the connecting member N described above. become.

  In order to bring down the forward tilting side wall 10 and the trailing tilting side wall 20 in which the door fitting recess A2 is closed by the door D in a state of standing substantially vertically, first, a lock disposed on the leading tilting side wall 10 is used. As described above, the locking member u2 of the locking member U is moved to the central part of the preceding tilting side wall 10 to move the locking part u2 of the locking member U to the female frame portion 20c of the trailing tilting side wall 20 as described above. It is discharged from the joint recess 20c2, and the locked state by the locking member U between the preceding tilted sidewall 10 and the trailing tilted sidewall 20 is released.

  Next, one of the pre-tilt side walls 10 connected to the opposed low bank 2 is fitted into a fitting groove h2a formed in the opposed side wall h2 of the female hinge H1 formed in the low bank 2. The upper tilting side wall 10 is tilted in the direction of the upper deck 1a around the short axis h5c of the male hinge portion H1 'formed on the leading tilting side wall 10 so as to overlap the upper deck 1a. At this time, the fitting base h5 constituting the male hinge part H1 ′ formed on the preceding inclined side wall 10 is inserted into the opening h4 facing the inner wall h1 of the female hinge part H1 formed on the lower bank 2. It is configured to be. Thereafter, in the same manner, the other leading inclined side wall 10 is tilted in the direction of the upper deck 1a so that the other leading tilting side wall 10 is overlapped with the previously tilted one preceding tilted side wall 10 or the upper deck 1a. Defeat. The pre-tilt side wall 10 that has been tilted is configured to be positioned between the opposing high bank 3. In the present embodiment, the opposed leading inclined side walls 10 that are brought down are configured such that their tips overlap each other.

  Next, the rearward tilting side wall 20 is lifted up, and the fitting tip E 'of the fitting block E formed on the back surface of the lower end flange 20b1 of the rearward tilting side wall 20 is formed on the high bank 3. It is discharged from the fitting recess C1 ′ of the fitting space C1, and the tip of the fitting block E is positioned above the inner wall c4 that forms the fitting space C1 formed on the high bank 3. To. At this time, the short axis h5c of the male hinge portion H2 'formed on the back surface of the lower end flange 20b1 of the trailing inclined side wall 20 is formed on the opposite side wall h2 of the female hinge portion H2 formed on the high bank 3. So as not to come out of the fitted groove h2a. Thereafter, the opposing backward inclined side walls 20 are tilted in the direction of the upper deck 1a around the short axis h5c fitted in the fitting groove h2a so as to overlap with the preceding inclined side wall 10 which has been tilted first. Defeat. When the trailing tilt side wall 20 is tilted, the female frame portion 20c formed on the vertical side wall portion 20a constituting the trailing tilt side wall 20 is placed on the upper surface of the lower bank 2. Has been. In the present embodiment, the opposed backward inclined side walls 20 that are brought down are configured not to overlap each other.

  As described above, as shown in FIG. 28, the leading tilt side wall 10 and the trailing tilt side wall 20 in a state of being substantially vertically raised are tilted in the direction of the upper deck 1a, so that the leading tilt side wall 10 and the rear tilt side wall 20 are tilted. The row tilting side wall 20 is folded in a substantially horizontal state. At this time, the height T1 of the fitting protrusion 5 formed on the back surface 1b1 of the lower deck 1b (between the upper surface 3b of the high bank 3 and the upper surface of the tilted side wall 20 that is tilted horizontally) As shown in FIG. 3), a larger interval is formed.

  In order to assemble the preceding tilted sidewall 10 and the trailing tilted sidewall 20 into a box shape with the folded forward tilted sidewall 10 and the trailing tilted sidewall 20 folded substantially vertically as described above, the folding process described above is performed. And in reverse order. That is, first, the trailing inclined side wall 20 in a substantially parallel state is set up substantially vertically, and then the leading inclined side wall 10 is rotated in the vertical direction. The lifting prevention block 10f protruding from the outer surface 10d1 of the side end flange 10d of the tilted side wall 10 is fitted into the fitting recess 4a of the end extension 4 extended to the high bank 3. Become. Therefore, even if it is going to lift the vertically inclined leading inclined side wall 10, it is possible to prevent the leading inclined side wall 10 from being lifted from the lower bank 2.

  In order to prevent the leading tilt side wall from being lifted, conventionally, the leading tilt side wall and an appropriate portion of the deck are configured to be locked by a lock member as a separate member. Therefore, it takes time to operate the lock member. There has been a problem that the workability of assembling and folding the front tilting side wall and the trailing tilting side wall is poor. Further, there is a problem that the operator may forget to lock the pre-tilt side wall and the deck by the lock member, and the pre-tilt side wall is lifted. However, in the present invention, the lifting prevention block 10f protruding from the outer surface 10d1 of the side end flange 10d of the preceding tilting side wall 10 is provided on the high bank 3 only by rotating the leading tilting side wall 10 in the vertical direction. Since it is comprised so that it may be fitted to the fitting recessed part 4a of the extended edge part extension part 4, the workability | operativity of the assembly operation | work of the leading inclination side wall 10 and the trailing inclination side wall 20 and folding work improves. At the same time, since no locking member is used as in the prior art, there is no mistake in locking between the pre-tilt side wall and the deck, and the structure of the box pallet is simplified, which in turn reduces the manufacturing cost of the box pallet. Can be

  As shown in FIG. 29, from the state where the door D is tilted so as to overlap the trailing tilt side wall 20, the door D is connected to the hinge shaft d8 on the door D side hinged by the connecting member N. When it is rotated in the direction of the door fitting recess A2 around the hinge shaft 20j on the rearward tilting side wall 20 side, as shown in FIG. 30, first, a substantially trapezoidal shape formed on the door D The upper end of a substantially trapezoidal fitting protrusion 20m formed on the lower horizontal side wall 20b having an upper end narrower than the interval between the lower ends is inserted into the lower end of the fitting recess d11. The inner surface of the lower horizontal side wall portion 20b described above, wherein the lower end portion of the substantially inverted trapezoidal fitting protrusion d9 formed on the back surface of the lower end flange d3 of the door D has an upper end interval wider than the width of the lower end portion. Inserted into the upper end of the substantially inverted trapezoidal fitting recess 20k formed in 20b2. It will be. After that, when the door D is further rotated in the direction of the door fitting recess A2, the door D has a biaxial structure of the hinge shaft d8 on the door D side and the hinge shaft 20j on the trailing inclined side wall 20 side. In addition, even if the door D moves in the direction of the vertical side wall portion 20a constituting the trailing tilt side wall 20 or draws a complicated turning locus such as tilting with respect to the trailing tilt side wall 20, The fitting protrusion 20m is guided by the opposing inclined surfaces of the substantially trapezoidal fitting recess d11, and the substantially inverted trapezoidal fitting projection piece d9 is relative to the substantially inverted trapezoidal fitting recess 20k. Will be guided to the inclined surface. As described above, the door D is constituted by the substantially trapezoidal fitting protrusion 20m, the substantially trapezoidal fitting recess d11, the substantially inverted trapezoidal fitting projection piece d9, and the substantially inverted trapezoidal fitting recess 20k. The door D is configured to close the door fitting recess A2 formed in the trailing tilt side wall 20 while being positioned, so that the door D is configured to close the vertical side wall portion 20a and the lower horizontal portion constituting the trailing tilt side wall 20. There is no contact with the side wall portion 20b, and therefore the workability of the closing operation by the door D of the door fitting recess A2 is improved.

  In the closed state, a substantially trapezoidal fitting protrusion 20m formed on the lower horizontal side wall 20b of the trailing inclined side wall 20 is fitted into the substantially trapezoidal fitting recess d11 formed on the door D. And a substantially inverted trapezoidal fitting protrusion d9 formed on the back surface of the lower end flange d3 of the door D is formed on the inner surface 20b2 of the lower horizontal side wall portion 20b of the trailing inclined side wall 20. Since it is fitted in the fitting recess 20k having a shape, the movement of the door D in the direction of the vertical side wall 20a constituting the trailing inclined side wall 20 is suppressed, and thus rattling of the door D is prevented. Can do.

  Furthermore, when the door fitting recess A2 formed on the trailing tilt side wall 20 is closed by the door D, the fitting projection d5a formed on the male frame portion d5 of the door D tilts the trailing tilt. It is comprised so that it may be fitted by the fitting recessed part 20h1 formed in the female-type frame part 20h of the vertical side wall part 20a which comprises the side wall 20. As shown in FIG. Therefore, when a load is applied to the door D from the outside, only the lock portion u2 of the lock member U is compared with the case where the lock portion fitting recess d6 formed in the male frame portion d5 of the door D is inserted. Thus, the burden on the load of the lock portion u2 is reduced, and thus it is possible to prevent the lock portion u2 of the lock member U from being deformed or damaged, and to suppress the rattling of the door D. it can.

  Next, the case where another box pallet is stacked on the box pallet in a state where the leading tilt side wall 10 and the trailing tilt side wall 20 are set up substantially vertically will be described with reference to FIGS. 31 and 32. .

  Upper box pallet Pa (FIG. 31 shows a state in which the leading tilting side wall 10 and the trailing tilting side wall 20 of the box pallet Pa positioned above are folded as shown in FIG. The inner wall of the trailing inclined side wall 20 is opposed to the inner wall of the preceding inclined side wall 10 of the box pallet Pb located below the fitting projection 5 formed on the back surface 1b1 of the lower deck 1b. And the rear wall 1b1 of the lower deck 1b of the box pallet Pa positioned on the upper side of the lower deck 1b. One of the four auxiliary protrusions 6 formed is opposed to the fitting concave part 10 formed on the upper end flange 10b of the preceding inclined side wall 10 of the box pallet Pb located below. Fit engaged, also in the other opposing auxiliary protrusion 6 is configured to be inserted into the wide recess d10 formed at the upper flange d2 of the door D.

  The length of the bottom portion 10g2 (the length along the length direction of the upper end flange 10b; shown in FIG. 1) W9 constituting the fitting recess 10g formed in the preceding inclined side wall 10 is the auxiliary projection 6. And the lower surface of the auxiliary projection 6 is positioned in contact with or close to the bottom 10g2 constituting the fitting recess 10g. However, even if it tries to move along the pre-tilt side wall 10 of the box pallet Pb located below, the auxiliary protrusion 6 of the box pallet Pa located above constitutes the fitting recess 10g of the box pallet Pb located below. Therefore, the movement of the box pallet Pb located below the box pallet Pa located above the side wall 10g is suppressed.

  As described above, the auxiliary protrusion 6 of the upper box pallet Pa is brought into contact with the inclined side portion 10g1 constituting the fitting recess 10g of the lower box pallet Pb, whereby the upper box pallet is positioned. Since the movement of the box pallet Pb positioned below Pa along the pre-tilt side wall 10 is suppressed, the fitting formed on the back surface 1b1 of the lower deck 1b of the box pallet Pa positioned above The protrusion 5 can be prevented from coming into contact with the door D of the box pallet Pb located below. Therefore, the door D and the lower horizontal side wall 20b of the trailing inclined side wall 20 are hingedly connected. The connecting member N is deformed or damaged, or the hinge shaft d8 formed on the door D or the hinge shaft 2 formed on the lower horizontal side wall portion 20b of the trailing inclined side wall 20 It is possible to prevent j from being deformed or damaged, and the fitting protrusion 5 formed on the back surface 1b1 of the lower deck 1b of the box pallet Pa located above has the box pallet Pb located below. It is possible to prevent the vertical side wall portion 20a, which is weak in strength, coming into contact with the weak side wall portion 20a constituting the rearward inclined side wall 20 from being deformed or damaged.

  Further, when the upper box pallet Pa is about to move along the trailing inclined side wall 20 of the lower box pallet Pb, the upper side of the lower deck 1b of the upper box pallet Pa is placed on the back surface 1b1. Since the formed fitting protrusion 5 comes into contact with the inner wall of the preceding inclined side wall 10 of the box pallet Pb located below, the succeeding box pallet Pb located below the box pallet Pa located above. Movement along the tilted side wall 20 is suppressed. Even if the fitting protrusion 5 formed on the back surface 1b1 of the lower deck 1b of the upper box pallet Pa is in contact with the preceding inclined side wall 10 of the lower box pallet Pb, Unlike the rearward tilting side wall 20 in which the door fitting recess A2 is not formed and the door fitting recess A2 is formed, the leading tilting side wall 10 is deformed or damaged due to its high strength and rigidity. There is no.

  Further, an auxiliary protrusion formed on the upper box pallet Pa is formed in the wide concave portion d10 formed in the door D fitted in the door fitting concave portion A2 of the trailing inclined side wall 20 of the lower box pallet Pb. When the portion 6 is inserted, a predetermined gap W10 is formed between the lower surface of the auxiliary projection 6 and the bottom d10b of the wide concave portion d10, and the auxiliary projection 6 and the wide concave portion d10 are relative to each other. A predetermined gap W11 is formed between the inclined side portion d10a. Furthermore, the corner girder 1c1 of the box pallet Pa located on the upper side is placed on the opposite vertical side wall portion 20a of the rearwardly inclined side wall 20 of the box pallet Pb located on the lower side. It is comprised so that it may not be mounted in the door D fitted by recessed part A2. Therefore, as described above, in the state where the other box pallets Pa are stacked on the box pallet Pb located under the state in which the leading tilt side wall 10 and the trailing tilt side wall 20 are set up substantially vertically, When opening the door D of the lower box pallet Pb, the door D comes into contact with the auxiliary protrusion 6 and the corner beam 1c1 of the upper box pallet Pa, and the rotation of the door D is prevented. There is nothing.

  Next, using FIG. 33 and FIG. 34, another box pallet is stacked on the box pallet in a state where the leading tilt side wall 10 and the trailing tilt side wall 20 are tilted so as to overlap the upper deck 1a. The case will be described. FIG. 33 shows the box pallet Pa positioned on the assembled state in which the leading tilt side wall 10 and the trailing tilt side wall 20 are set up substantially vertically.

  The fitting protrusions 5 formed on the back surface 1b1 of the lower deck 1b of the upper box pallet Pa are the inner walls of the high bank 3 and the opposite ends of the high bank 3 of the lower box pallet Pb. It is formed so as to be located close to the inner wall of the end extension 4 extended to the center, and is formed at the center of the upper surface 3b of the high bank 3 facing the lower box pallet Pb. The auxiliary protrusion 6 located on the high bank 3 side of the box pallet Pa located above is fitted in the fitting recess 8.

  When the upper box pallet Pa is about to move along the lower bank 2 of the lower box pallet Pb, the upper box pallet Pa is formed on the back surface 1b1 of the lower deck 1b of the upper box pallet Pa. Since the fitting protrusion 5 is in contact with the inner wall of the high bank 3 of the box pallet Pb located below, the fitting protrusion 5 is along the low bank 2 of the box pallet Pb located below the box pallet Pa located above. The movement will be suppressed.

  Further, when the upper box pallet Pa is about to move along the high bank 3 of the lower box pallet Pb, the upper box pallet Pa is formed on the back surface 1b1 of the lower deck 1b of the upper box pallet Pa. Since the fitting protrusions 5 are in contact with the inner walls of the end extension 4 extended at both ends of the high bank 3 of the box pallet Pb located below, the box pallet Pa located above Movement along the high bank 3 of the box pallet Pb located below is suppressed. Further, an auxiliary protrusion located on the high bank 3 side of the box pallet Pa located above is fitted into the fitting recess 8 formed in the center of the upper surface 3b of the upper bank 3 facing the lower box pallet Pb. Since the part 6 is fitted, the movement along the high bank 3 of the box pallet Pb located under the box pallet Pa located above is more reliably suppressed.

  Next, the box pallet in a state where the pre-tilt side wall 10 is tilted so as to overlap the upper deck 1a will be described with reference to FIG.

  When the pre-tilt side wall 10 is tilted so as to overlap the upper deck 1a, the semicircular shape of the strip-shaped plate portion h5a constituting the male hinge portion H1 ′ formed on the back surface of the lower end flange 10c of the pre-tilt side wall 10 A locking ridge h5d projecting from the lower end of the front end h5a 'of the upper end h1a' of the through hole h1a drilled in the lower part of the inner wall h1 of the female hinge H1 formed on the lower bank 2 It is comprised so that it may contact | abut or approach to. Therefore, the pre-tilt side wall 10 that has been tilted so as to overlap the upper deck 1a is not lifted, and rattling of the pre-tilt side wall 10 is prevented.

  Further, when the trailing tilt side wall 20 is tilted, the female frame portion 20c formed on the trailing tilt side wall 20 is configured to be placed on the upper surface of the lower bank 2, A fitting projection 7 (shown in FIG. 2) projecting from the center of the upper surface 2b of the lower bank 2 is formed at the upper end of the distal end surface of the female frame portion 20c of the trailing inclined side wall 20. It is configured to be fitted into the formed fitting projection fitting recess 20c3 (shown in FIG. 6, FIG. 27, etc.).

  As described above, when the trailing tilt side wall 20 is tilted, the fitting projection 7 projecting from the central portion of the upper surface 2b of the lower bank 2 has the female frame portion of the trailing tilt side wall 20. Since it is configured to be fitted in the fitting projection fitting recess 20c3 formed on the front end surface of 20c, the rear tilting side wall 20 can be rearward even if a load such that the fork contacts is applied. The movement of the row tilting side wall 20 is suppressed, so that the male hinge portion H2 ′ and the fitting block E formed on the back surface of the lower end flange 20b1 of the lower horizontal side wall portion 20b of the following tilting side wall 20 are deformed or damaged. This can prevent anything.

  In FIG. 15 and FIG. 16, 20 n is a pair of fitting protrusions that are suspended from the back surface of the lower end flange 20 b 1 of the lower horizontal side wall portion 20 b that constitutes the trailing inclined side wall 20. 20n is configured to be fitted into a recess or a through hole 3b1 formed in the upper surface 3b of the high bank 3 shown in FIG. 2 when the trailing inclined side wall 20 is set substantially vertically. ing. In this way, when the trailing inclined side wall 20 is erected substantially vertically, the fitting protrusion 20n that is suspended from the back surface of the lower end flange 20b1 of the lower horizontal side wall 20b is formed on the upper surface 3b of the high bank 3. Since it is configured to be fitted into the recessed portion or the through hole 3b1, it is possible to reliably prevent the trailing inclined side wall 20 from being inclined. The fitting protrusion 20n and the through hole 3b1 can be omitted as appropriate.

  FIG. 36 shows another embodiment of the locking member U. In this embodiment, the central part of the vertical side wall u1a in which the notch part u3 constituting the rectangular tube part u1 is not formed is curved in the direction of the vertical side wall u1a in which the notch part u3 is formed to bend the curved concave part u1a. And a reinforcing rib u7 connected to the lock portion u2 is formed in the curved recess u1a 'located on the lock portion u2 side. Thus, the strength of the vertical side wall u1a in which the notch u3 is not formed is formed by forming the curved recess u1a ′ and forming the reinforcing rib u7 connected to the lock portion u2 in the curved recess u1a ′. Can be improved. Therefore, as described above, even when the lock member U is repeatedly brought into contact with the vertical side wall u1a where the notch u3 is not formed, the vertical side wall u1a where the notch u3 is not formed is deformed or damaged. There is no such thing.

  In the embodiment described above, an example is shown in which doors D are provided on both of the opposite trailing inclined side walls 20, but only one of the opposing trailing inclined side walls 20 has a door. D can also be provided.

FIG. 1 is a perspective view of a box pallet according to the present invention. FIG. 2 is a perspective view from above of the pallet constituting the box pallet of the present invention. FIG. 3 is a perspective view from the back side of the pallet constituting the box pallet of the present invention. FIG. 4 is a partially enlarged perspective view of the bottom bank constituting the box pallet of the present invention. FIG. 5 is a partially enlarged perspective view of a high bank constituting the box pallet of the present invention. FIG. 6 is a perspective view of a pretilt side wall constituting the box pallet of the present invention. FIG. 7 is a partially enlarged perspective view of the pretilt side wall constituting the box pallet of the present invention. FIG. 8 is a partially enlarged perspective view of a pre-tilt side wall that also constitutes the box pallet of the present invention. FIG. 9 is a partial horizontal sectional view of the pre-tilt side wall constituting the box pallet of the present invention. FIG. 10 is a perspective view of a lock member constituting the box pallet of the present invention. FIG. 11 is a perspective view of a lock member that similarly constitutes the box pallet of the present invention. FIG. 12 is a partially enlarged perspective view of a pre-tilt side wall constituting the box pallet of the present invention in a state where the lock member is disposed. FIG. 13 is a partial horizontal cross-sectional view including the lock member of the pre-tilt side wall constituting the box pallet of the present invention in a state where the lock member is disposed. FIG. 14 is a partial horizontal cross-sectional view including the lock member of the pre-tilt side wall constituting the box pallet of the present invention in a state where the lock member similar to FIG. 13 is disposed. FIG. 15 is a perspective view of a trailing inclined side wall constituting the box pallet of the present invention. FIG. 16 is a perspective view of a trailing inclined side wall that similarly constitutes the box pallet of the present invention. FIG. 17 is a perspective view of a door constituting the box pallet of the present invention. FIG. 18 is a perspective view of a door that similarly constitutes the box pallet of the present invention. FIG. 19 is an exploded perspective view of a connecting member constituting the box pallet of the present invention. 20 is a perspective view of a halved portion constituting the connecting member shown in FIG. FIG. 21 is a partially enlarged perspective view including partial cross sections of a rearward inclined side wall, a door, and a half portion constituting the box pallet of the present invention. FIG. 22 is a partially enlarged perspective view including partial cross sections of the trailing inclined side wall, the door, and the connecting member constituting the box pallet of the present invention. FIG. 23 is a perspective view including a partial cross section of a connecting member constituting the box pallet of the present invention. FIG. 24 is a partial perspective view including a partial cross section of a door and a rearward inclined side wall constituting the box pallet of the present invention. FIG. 25 is a partial horizontal cross-sectional view including the lock member on the preceding inclined side wall constituting the box pallet of the present invention in a state where the lock member is disposed. FIG. 26 is a partially enlarged perspective view of a pallet such as a lower bank and a pre-tilt side wall constituting the box pallet of the present invention. FIG. 27 is a perspective view of a rearwardly inclined side wall and a door constituting the box pallet of the present invention. FIG. 28 is a perspective view of the box pallet of the present invention in a folded state. FIG. 29 is a perspective view of a rearward tilting side wall and a door constituting the box pallet of the present invention. FIG. 30 is a perspective view of the trailing inclined side wall and the door that also constitute the box pallet of the present invention. FIG. 31 is a perspective view showing a state in which the box pallets of the present invention are stacked. 32 is a partially enlarged perspective view of FIG. FIG. 33 is a perspective view showing a state in which the box pallets of the present invention are stacked. 34 is a partially enlarged perspective view of FIG. FIG. 35 is a partially enlarged perspective view of the pre-tilt side wall, the lower bank, etc. in a collapsed state constituting the box pallet of the present invention. FIG. 36 is a perspective view of another embodiment of the lock member constituting the box pallet of the present invention.

Explanation of symbols

C1 ..... fitting space D ..... door d8 ..... hinge shaft E .. ·········· Fitting blocks H1, H2 ·································· Stop projection h5d
h3a ··················································· Connecting member N ' ············ Bearing portion n8 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · only U1 · · · only lock member 1a・ ・ ・ Upper deck 1b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Lower deck 1c ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Girder 2 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Lower bank 3. ······························································································································ ··········································································································· ·························································································································· 2 0 ····· Trailing side wall 20j ···············································

Claims (1)

In a box pallet in which the side wall disposed so as to surround the pallet can be folded so as to overlap the pallet, the male hinge is formed on the opposite side wall that is tilted in the pallet direction first from the substantially vertical state. A locking protrusion is provided at the lower end of the portion, and the locking protrusion is formed on the bottom plate of the female hinge portion formed on the lower bank of the upper deck when the side wall is erected substantially vertically. A contact ridge on which the contact is made, and a through-hole is formed in the back wall of the female hinge portion formed on the lower bank of the upper deck, so that the above-mentioned vertical state is When the opposing side walls that are tilted in the pallet direction are tilted so as to overlap the upper deck, the locking ridges projecting from the male hinge portion come into contact with the upper edge forming the through hole. or that it is configured to be positioned in close proximity Box pallets and butterflies.

Images