US3041029A - Collapsible pallets - Google Patents

Description

June 26, 1962 D. c. BROWN 3,0 29

COLLAPSIBLE PALLETS Filed May 2a. 1956 2 Sheets-Sheet 1 INVENTOR DWIGHT C. BROWN ATTORNEY June 26, 1962 D. C. BROWN COLLAPSIBLE PALLETS 2 Sheets-Sheet 2 Filed May 23. 1956 IN VENTOR ATTORNEY 3,041,029 COLLAPSIBLE PALLETS Dwight C. Brown, Arlington, Va. Filed May 23, 1956, Ser. No. 586,889 11 Claims. (Cl. 248-120) (Granted underTitle 35, US. Code (1952), sec. 266) This invention described herein may be manufactured and used by or for the Government of the United States for governmental purposes without the payment to me of any royalty thereon in accordance with the provisions ofTitle 35, United States Code, section 266.

This invention relates to folding or collapsible type pallets for use in shipping equipment and supply items and is designed to provide for unitized handling by the use of fork lift and pallet lift trucks in shipping and storage operations.

The invention has specific reference to pallets made chiefly of paperboard material of the expendable or disposal type used for initial shipment, distribution and storage, and reuse where desired, for transporting, handling and storing materials in unit loads.

Because of its economical cost as compared with conventional rigid type wood and metal pallets, the collapsible paperboard type of pallet as embodied in this invention may be expended after final distribution or consumption of the materials stored and shipped thereon.

While all the modifications are suitable adapted to fabrication from paperboard material, they can also be fabricated either wholly or in part from metal, plywood, veneer and laminated material having a wood veneer core with paper or paperboard on one or both sides.

The term paperboard as used herein refers to and includes corrugated board, fibreboard and other paper and fibrous products that are capable of supporting relatively medium and heavy weight loads. The paperboard material may wholly or in part be treated with resins, inorganic silicates, glues, synthetic rubber compounds, insecticides, corrosion inhibitors, moisture proofing materials, plastics and similar type materials for stiffening and strengthening.

One of the objects of the invention is to provide an inexpensive, light weight, substantially flat type pallet with novel folding and collapsible features embodied in the support members which provides a secure, simple, quick and easy means of setting up the pallet for use from a knock-down position and collapsing to a substantially flat form for return shipment or storage for reuse, if so desired.

Another object is to provide a pallet having a substantially flat shape when not set up for use, with folding or collapsible support members so designed and constructed as to enable instantaneous setup when needed for use with fork lift and pallet truck equipment with no additionalfabrication, stapling or other assembly, fastening or insertion of component parts required for such setup.

A further object is to provide a pallet with support members so designed and constructed as to be folded or collapsed against the top and underside of the pallet deck enabling the furnishing and distribution of a complete pallet in substantially fiat form. This avoids the disadvantages of permanently setup rigid pallets which take up or displace considerably more cubic space during transportation and storage by the manufacturer, dis-tributor and user prior to use or during return shipment or storagepending reuse.

Referring to the drawings for a more complete dis-' closure of the invention:

FIGURE 1 is a top side perspective view of one form of the invention in partially setup position;

3,641,029 Patented June 26, 1962 FIGURE 2 is a top side perspective view of the form shown in FIGURE 1 in a collapsed or folded position;

FIGURES 3 and 4 are detailed perspective views of the cellular support members;

FIGURE 5 is an underside fragmentary perspective view of a modified form;

FIGURE 6 is an underside perspective View of another modified form; and FIGURE 7 is a fragmentary perspective view of the near end of FIGURE 6 with the support members in a partially folded position.

Referring to FIGURE 1, 1 is the top supporting surface or deck of the pallet. Fastened in a hinged-like arrangement at one end is a honeycomb collapsible cell supporting member 2 and a similar collapsible supportingmember 3 extends from the other end of the pallet.

' Hinged to the underside of the deck 1 is a collapsible supporting member 4 similar in construction to themembers 2 and 3. The exterior side of both end supporting members may be a continuation of the deck scored to provide a hinge-like arrangement.

In the folded position shown in FIGURE 2, the supportingmembers 2 and 3 are folded flat on top of the deck 1 and the supporting member 4 is folded fiat on the underside of the deck 1. In shipping the pallet in this flat folded position for subsequent use, the minimum amount of cubic space is used.

1 an intermediate position on its way to the same supporting position as support 2, FIGURE 1.

The supports 2, 3 and 4 in their unfolded, open, supporting position are as shown in FIGURE 3 and consist of cells 5 formed by sides 6 and 7 andends 8 and 9 hinged to the sides 5 and 7. Thepartition 10 has slots 13 that engageslots 14 in the partitions 11. Thesides 12 are fixedly secured to the sides 6 and 7. All intersecting sides and pantitions are hinged together at the intersections by scoring or other means.

In the folded position, FIGURE 2, theend 8 overlies the side 7 and is in a plane parallel to the side 7 and the end 9 underlies the side 6 and is in a plane parallel to the side 6. Thepartition 10 is parallel with and interposed between the sides 6 and 7. The partitions 11 are interposed between the sides 6 and 7 and are substantially parallel with theends 8 and 9.

To hold thesupports 2, 3, and 4 in their setup position, there are provided a plurality of flexible fastening strips, 14a, 14b and 14c carried by the top 1 and similar strips, 15a, 15b and 150, carried respectively by the supporting members, 2, 3 and 4. In the deck 1 of the pallet are a plurality of slots, 16, 17a, 17b, 18a and 18b. Thestrip 15b engages with theslot 16; thestrip 15c engages with theslot 17b, and at its end with slot 17a when threaded therethrough. Thestrip 15a engages similarly with theslots 18a and 18b. The reinforcement strips fit tightly in the slots. When threaded through one slot the holding power may be sufiicient or the strip can be threaded through an adjacent slot for additional holding power.

Thestrips 14a, 14b and are threaded into one of the cells 5 of the supporting members in sufficiently tight frictional engagement with the walls of the cell to hold the supports in setup position.

In the case of light or comparatively light pallet loads thefastening strips 14a, 14b and 14a may be omitted and the anchoring of the cell supporting members may be accomplished in other ways.

The sides 6 and-7 may have cut-outslots 22 for fork lift truck entry.

supporting members are modified in their construction.

As in FIGURE 1 there are three rows of supports, two similar end supports 19 (only one being shown) that are arranged hinge-like to fold on top of the deck 1 and an intermediate support 2t} that is hinged to and folds on the underside of the deck 1.

Each support member has a commonbottom support panel 21 running transversely of the pallet and which serves as a means for maintaining thesupport cells 23, 24 and 25 in a proper expanded support position when a load is applied to the top of the pallet deck.

Thepanel 21 is foldable along theline 26. Each support cell is hinged to thepanel 21 at 2,7 and 28 and hinged to the part 1 at 29.

The support cells in their open position are arranged as shown at 25a for theend support 19. In the folded position they are arranged as shown for theintermediate support 20.

Thecentral partition 30 is hinged to the transverse part-itions 31 at 32 and to theends 33 at 34. Thetransverse partitions 31 and theends 33 are hinged to thesides 35. Thesides 36 of the cells are integral with thesides 35.

In folded position thesides 35 are in parallel planes and the folded sides of thepanel 21 in approximately the same plane. Between thesides 35, thetransverse partitions 31, thecentral partition 30 and the folded sides of theends 33 are in planes approximately parallel to the sides 35'.

In the modification, FIGURES 6 and 7, there are threerows 36, 37 and 38 of supporting cells extending transversely of the deck 1. All the rows are on the underside of the deck 1, both in folded and supporting position.

Each of the three rows is provided with three folding cellular supporting members, 39, 40 and 41. The internal construction of each of the folding cellular supporting components is the same as in the modification, FIGURE 5, but their arrangement on the panel and mode of operation is different.

Thepanels 42 extend transversely of the underside of the deck 1 and are foldable along thelines 43. Eachpanel 42 is hinged along one longitudinal edge to the underside of the deck 1 at 44 and at the same point to the lower edge of theinner sidewall 46 of the cellular supporting member. The panel 4-2 is hinged along its other longitudinal edge to the lower edge of theouter sidewall 45 of the cellular supporting member. The upper edge of theouter sidewall 45 of the cellular supporting member is hinged to the underside :of thelongitudinal strips 48 at 49. Theside 47 of the cellular supporting member folds inwardly along theline 50 in the same manner as theend 33 as shown in FIGURE 5. A fastening tab 51 can be secured to a support for holding the pallet in setup position.

In shifting from the partly folded position of FIG- URE 7, to the supporting position of FIGURE 6, thepanel 42 rotates to the right about thehinge 44 to the flat position of FIGURE 6. Thesides 45 and 46 rotate to the right about their hinged connections from a folded superposed substantially horizontal position to a vertical open cellular position overlying thepanel 42.

The arrangement of FIGURES 6 and 7 are particularly adaptable for four-way fork lift truck entry and low lift pallet lift trucks. With this arrangement the pallet can be set up from knocked down position and held there by fastening with the tab 1 at only one point.

The arrangement of FIGURE 7 permits the simultaneous operation of all nine supporting members from the folded to the supporting position.

While three spacer strips are shown, a single panel full under-decking could be substituted for the separate strips without affecting the mode of operation.

It will be noted that the cellular supporting members are self-contained and are convertible from a folded to a supporting position without the addition of any separate reinforcing members, the integral honeycomb supporting structure being so designed as to be foldable within the sides of the members when in inoperative position.

I claim:

1. A portable materials handling accessory adapted for use in lift truck operations comprising a platform adapted to receive a load upon its upper surface and a plurality of spaced collapsible supporting units disposed beneath and elevating said platform, the supporting units having an open supporting position and a closed flat folded position, the supporting units when in an unfolded open supporting position being in the form of a rectangular receptacle, interconnected partitions fixedly secured within the sides of the receptacle when in folded and unfolded position, the units when in folded position having the sides of the receptacle in substantially parallel planes and the partitions interposed between the sides and substantially parallel therewith, the supporting units being collapsible from the open supporting position to the folded collapsed position without disassembling the units, the supporting units being pivotally connected only at one edge to the supporting platform and adapted to swing as a unit from supporting position to folded position.

2. A portable materials handling accessory adapted for use in lift truck operations comprising a platform adapted to receive a load upon its upper surface and a plurality of spaced collapsible supporting units disposed beneath and elevating said platform, the supporting units having an open supporting position and a closed flat folded po sition, the supporting units when in an unfolded open supporting position being in the form of a rectangular receptacle, interconnected partitions fixedly secured within the sides of the receptacle when in folded and unfolded position, the units when in folded position having the sides of the receptacle in substantially parallel planes and the partitions interposed between the sides and substantially parallel therewith, the supporting units being collapsible from the open supporting position to the folded collapsed position without disassembling the units, the supporting units being pivotally connected only at one edge to the supporting platform and adapted to swing as a unit from supporting position to folded position and means for securing the units in set up open supporting position against collapse to the flat folded position.

3. A portable materials handling accessory adapted for use in lift truck operations comprising a platform adapted to receive a load upon its upper surface and a plurality of spaced collapsible supporting units disposed beneath and elevating said platform, the supporting units having an open supporting position and a closed flat folded position, the units when in an unfolded open supporting position being in the form of a receptacle, reinforcing means fixedly secured within the receptacle when in folded and unfolded position, the units when in flat folded position having the reinforcing means located between the sides of the receptacle, the supporting units being collapsible from the open supporting position to the folded collapsed position Without disassembling the units, the supporting units being pivotally connected only at one edge to the supporting platform and adapted to swing as a unit from supporting position to folded position.

4. The pallet ofclaim 3 in which a plurality of units are hinged to the underside of the deck and means connecting the units for simultaneously moving them from one position to the other position.

5. The pallet ofclaim 3 in which a supporting unit is hinged to the deck along one of the edges of the unit and adapted to swing as a unit from one position to the other position.

6. The pallet ofclaim 3 in which the supporting unit is hinged to the deck along one of the edges of the unit and adapted to swing as a unit from supporting position below the deck to folded position on top of the deck.

7. The pallet ofclaim 3 in which a fastening device is provided between the unit and the deck for holding the unit in supporting position.

8. The pallet ofclaim 3 in which a supporting unit is hinged at opposite sides of the deck and at the underside of the deck, the units at the sides of the deck being in folded position on top of the deck.

9. A portable materials handling accessory adapted for use in lift truck operations comprising a platform adapted to receive a load upon its upper surface and a plurality of spaced collapsible supporting units disposed beneath and elevating said platform, the supporting units having an open supporting position and a closed flat folded position, the units when in an unfolded open supporting position being in the form of a receptacle, reinforcing means fixedly secured within the receptacle when in folded and unfolded position, the units when in flat folded position having the reinforcing means located between the sides of the receptacle, the supporting units being collapsible from the open supporting position to the folded collapsed position Without disassembling the units, the supporting units being pivotally connected only at one edge to the supporting platform and adapted to swing as a unit from supporting position to folded position and means for securing the units in set up open supporting position and against collapse to the flat folded position.

:10. A portable materials handling accessory adapted for use in lift truck operations comprising a platform adapted to receive a load upon its upper surface and a plurality of spaced collapsible supporting units disposed beneath and elevating said platform, the supporting units being in the form of a rectangular receptacle, interconnected partitions fixedly secured within the sides of the receptacle, the units having an open supporting position and a collapsed folded position, the units when in folded position having the sides of the receptacles in substantially parallel planes and the partitions interposed between the sides and substantially parallel therewith, the plane of the partitions being vertical in open supporting position of the units when in use, the units being collapsible from the open supporting position to folded position without disassembling the units, the supporting units being pivotally connected at only one edge to the supporting platform and adapted to swing as a unit from supporting position to folded position.

11. A portable materials handling accessory adapted for use in lift truck operations comprising a platform adapted to receive a load upon its upper surface and a plurality of spaced collapsible supporting units disposed beneath and elevating said platform, the supporting units being in the form of a rectangular receptacle, interconnected partitions fixedly secured within the sides of the receptacle, the units having an open supporting position and a collapsed folded position, the units when in folded position having the sides of the receptacles in substantially parallel planes and the partitions interposed between the sides and substantially parallel therewith, the plane of the partitions being vertical in open supporting position of the units when in use, the units being collapsible from the open supporting position to folded position without disassembling the units, the supporting units being pivotally connected at only one edge to the supporting platform and adapted to swing as a unit from supporting position to folded position, and means for securing the units in set up open supporting position against collapse to the flat folded position.

References Cited in the file of this patent UNITED STATES PATENTS 1,072,185 Smiley Sept. 2, 1913 1,112,859 Smiley Oct. 6, 1914 2,444,183 Cahners June 29, 1948 2,503,240 Cahners Apr. 11, 1950

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