FI107904B - Pallet - Google Patents

Description

107904

Pallet This invention relates to a pallet made mainly of recyclable cardboard and comprising beams of cartonboard cores perpendicularly perpendicular to the plane of the pallet and of corrugated cardboard surrounding them, arranged in parallel and at least one element facing one of the beams.

Pallets are traditionally made of wood with high load-bearing capacity. A wooden pallet usually takes a number of applications, but in practice the pallets end up in landfills quite quickly.

It is also known to make a pallet of cardboard which after use can be recycled back to the production of recycled pulp. This avoids the waste problem caused by pallets. However, the drawback of cardboard pallets compared to wooden pallets has been their lower strength and load capacity.

U.S. Patent Application No. 923261 describes a cardboard pallet mainly intended for disposable use, comprising beams of parallel tubular carton cores and surrounding cardboard located on a pallet such that the axes of the cores contained therein are perpendicular to the plane of the pallet. The cores, which are commonly used as cores for paper rolls, are made by gluing spirally wound cardboard layers on top of a thick tube having a plurality of cardboard layers. The solution utilizes high compressive strength in the axial direction of the cores to improve the load-bearing capacity of the cardboard, recyclable pallet.

It is an object of the present invention to improve the design of a pallet formed of beams comprising carton core pieces so as to improve the strength of the beams. The invention is characterized in that each beam * :: has a rigid cardboard support between the carton core pieces and the corrugated board layer beneath them, and that there is a second cardboard support board under each of the beams, with the two supports - ..VV 30 between the plates.

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. In the structure according to the invention, the support plate between the carton core pieces and the auxiliary board • * · * · ['] serves as a stiffener to facilitate the handling of the beams during the pallet assembly step. The function: *: * placed under the corrugated board further provides a sandwich-type structure in which tensile stress is applied to the lower plate and compression stress to the upper plate when the pallet is loaded. According to the invention, the support boards are preferably board made by gluing and pressing, whereby it is essential that their strength exceeds that of the sandwich corrugated board. Corrugated board forms a light and inexpensive layer 5 in the sandwich structure, which serves mainly to increase the thickness of the structure. Thickness increases the bending strength of the structure and the ability to bear especially the point load.

Said support plates, whose width substantially corresponds to the width of the beam and which extend uniformly from end to end of the beam, are preferably substantially identical to each other. The tiles may be rigid, glued and pressed board having a thickness of about 1-10 mm.

In the pallet according to the invention, the element that binds the parallel beams together can be formed by a uniform, pallet-covering top panel, which is preferably multilayer corrugated board. In addition to the topsheet, the pallet may comprise a continuous washer under the beams 15, which may also consist of corrugated board. The washer is preferably in the pallet as the lowest element so that the lower support plate under each beam is between the beam and the washer. The washer then protects the support plates from tearing due to impact.

According to a preferred embodiment of the invention each pallet 20 of the pallet comprises adjacent opposing core pieces at the center and at each end of the beam, leaving between the core pieces a top plate or similar element on the top of the beams, on both sides of the beam center. the apertures of the telescopic lifting device. The hoist can then catch a rectangle. . shaped pallet from any side of the pallet, i.e.. said openings on the sides parallel to the beams * \ 25 or on the sides perpendicular to the beams.

The fork lifting device can be a forklift or pump trolley pushing into openings or beams. For the pump trolley, the pallet washer may be provided with apertures located between the beams of the beams and said beams made of the beams • ·; at the intersections of the lines formed by the openings. The trolley can then lift and move the pallet with the wheels of the trolley in contact with the ground through the openings in the washer, such as: the ground or the floor.

The invention will now be described in more detail by way of example with reference to the accompanying drawings, in which Figure 1 shows a pallet of the invention, consisting of parallel beams and baseplates and top plates 35. Fig. 2 shows a pallet in horizontal section ΙΙ-, in Fig. 1, Fig. 3 shows a semi-finished beam in which a cardboard support plate and a plurality of carton cores are placed around the corrugated cardboard wrapping around them, Fig. 4 shows a beam and base and top plates at beams opening in section IV-IV in Fig. 1, Fig. 5 shows beam and base and top plates in beams of bar included in section VV in Fig. 1, Fig. 6 shows longitudinal section VI-VI in Fig. 2, 10 Fig. 7 on a larger scale, Figure 8 shows another embodiment of the invention a lane pallet in which the parallel beams are surrounded by a single bent sheet member, and Fig. 9 is a sectional view taken along the line IX-IX in Fig. 8.

Figure 1 illustrates a disposable pallet 1 of mainly disposable cardboard recyclable carton 1. The pallet comprises three parallel beams 4 of corrugated cardboard cores 2 consisting of mainly tubular carton cores 2 and surrounding cardboard overlay 5 and a pallet underneath the beams. 2, as shown in Figure 2, comprises three adjacent carton sleeve pieces 2 in the center of the beam and two adjacent carton sleeve caps 20 at each end of the beam. There are thus apertures 7 on both sides of the center of each beam 4, which are adjacent to the top plate 5 of the pallet. In addition, four apertures 8 are provided at the intersections between the parallel beams 4 and the transverse lines defined by the beams 7.

Each of the pallet beams 4 is formed as shown in Fig. 3 • · ....: suitably cut and folded corrugated sheet 3, rigid, glued and pressed. cardboard support plate 9 and, in the case of example, seven tubular cardboard core pieces 2 arranged so that their axes are perpendicular to the plane of the pallet *. *! I, i.e. the tops and washers 5, 6. In the corrugated cardboard sheet 3, the wider brackets 10 at the locations of the core pieces 2 are bent while the beam 4 is assembled around the core pieces 2 to surround them as shown in Figures 4 and 5.

..!: * 'The narrower corrugated cardboard sheet 3 at the notches 11 between the tabs 10 are folded at the openings 7 of the beam around the support plate 9 as shown in Figure 4. The parts of the beam 4 are preferably fastened to each other during the recycling process. 35 adhesive, which can also be used for the joints between the beams and the base and top panels 5, 6.

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Figures 4, 5 and 6 further show that below each beam 4, between the beam and the lower washer 6 on the pallet, is a second rigid support plate 13 of glued and pressed cardboard which extends uniformly from end to end of the beam. The width of said lower support plate 13 is the same as the width of the beam 4, that is slightly larger than the width of the upper support plate 9 inside the beam, which is the same as the diameter of the core pieces 2. The rigid support plates 9 and 13 and the corrugated cardboard layer forming the bottom of the beam 4 therebetween form together a load-bearing sandwich structure in which the upper plate 9 is compressed and the lower plate 13 is stretched. The intermediate corrugated cardboard layer 3 acts as a lightweight element increasing the thickness of the structure, which increases the bending strength of the structure.

Fig. 7 of the pallet corner shows that the topsheet 5 is assembled from double corrugated sheets by securing three such sheets 14-16 on top of one another so that the waves in the middle sheet 15 are perpendicular to the sheets 14, 16 on the top and bottom. In the example shown, one double corrugated sheet is used for the washer 6.

The presented pallet 1 with its articles thereon can be moved by a forklift whose lifting fork can be inserted between the washers and top plates either between adjacent beams 4 in the direction of the beams or transversely of the beams 7 in the direction of the beams. Similarly, instead of a forklift truck, a pump trolley driven between the bases and the top plates can be used, the wheels of which are driven to the openings 8 in the base plate, after which the pallet and its articles are lifted onto the cart for transport. The openings: T 7 left in the core strings of the beams 4 allow the pallet 1 to be grasped from any side, while the: 1 · 1: 25 pieces in the middle and ends of the beams receive a load perpendicular to the pallet, and the structure formed by the corrugated cardboard layer and the support plates 9, 13 is:. this beams together and stiffens them against bending.

Figures 8 and 9, corresponding to Figures 1 and 5 described above, show the invention; The pallet according to claim 1, which differs from the above only in that, instead of a separate washer, it comprises a unitary piece 17, which is a simple corrugated board, bent around the beams 4. The direction of the waves in the plate: 1 · 1 17 is perpendicular to the direction of the beams 4. The pallet topsheet 5 further comprises three double corrugated sheets 14, 15, 16 as described above.

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Said corrugated board 17 has openings 7 for a pallet handling device and 35 is folded around the beams 4 so that its edges 18 are opposite to each other. 8. The supporting plates 13 are located between the beams 4 and the corrugated board 17.

It will be apparent to one skilled in the art that various embodiments of the invention are not limited to the example illustrated, but may vary within the scope of the appended claim.

For example, it is possible that the pallet comprises a plurality of overlapping beams in which the cross-beams are mutually bonded to one another. The added beam layers may then replace the washer and / or topsheet of the above example. On the other hand, it is possible for the pallet to have one or more spacers separating the beam layers in addition to the washers and top plates.

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Claims (9)

107904 A pallet (1) made essentially of recyclable cardboard, comprising 5 beams (4) of tubular cardboard cores (2) perpendicularly perpendicular to the plane of the blade and surrounding corrugated board (3) arranged at least one against the beams for bonding the beams of the element (5, 6, 17) to one another, characterized in that each beam (4) has a rigid cardboard support plate (9) disposed between the carton core pieces (2) and the corrugated cardboard layer (3) below them and further comprising a second cartonboard support plate (13) with the corrugated cardboard layer 10 disposed between said two support plates. Pallet according to Claim 1, characterized in that the support plates (9, 13) are cardboard made by gluing and pressing with a thickness of about Ι-ΙΟ mm. Pallet according to Claim 1 or 2, characterized in that it comprises a cardboard topsheet (5) on top of the beams (4) which binds the beams together. Pallet according to one of the preceding claims, characterized in that it comprises a cardboard washer (6) · »M • under the beams (4) which binds the beams together. 1 Pallet according to Claims 3 and 4, characterized in that: • · · • '. The beams (4) are connected to one another by a continuous plate (17) bent around the beams; Pallet according to claim 4 or 5, characterized in that said support plates (13) below the beams (4) are located between the beams and the washer (6, 17). 30 • »... Pallet according to one of Claims 3 to 6, characterized in that the top plate (5) and / or the washer (6) or the plate body (17) surrounding the beams consists of: corrugated board. • · · · r • · · • • • m Pallet according to any one of the preceding claims, characterized in that - each of the beams (4) comprises adjacent opposing core pieces (2) • · · · · 1 in the middle and at each end of the beam such that between the core pieces the openings (7) of the pallet handling device, which are limited to the top plate (5) or the like on the top of the beams, remain on both sides of the center of the beam 107904. Pallet according to Claim 8, characterized in that the washer (6, 5 17) is provided with openings (8) which are spaced by parallel transverse lines defined by said openings (7) in the beams.