NL8201484A - Crate in thermoplastic material with corner elements - double-walled to form channels for battens inserted before welding elements together - Google Patents

Abstract

The arrangement is intended for mfg. a rectangular crate in thermo-plastic material from a number of pre-formed (injection-moulded but pref. blow-moulded) elements. Four of these are corner elements each having three integral sides at right angles to one another, the sides being double-walled such that at least two are provided with a hollow channel section. The elements are placed against one another with the channels in alignment after which strengthening members, such as wooden battens, are placed in the respective channels and the meeting sides butt-welded together or otherwise joined. Intermediate two-sides elements with similar channels may be arranged between corner elements.

Description

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HdB / MLD / 60.90.382

Dirk van der Woude in Willemstad, Curacao, Netherlands Antilles.

Method for the manufacture of a crate of thermoplastic material and box manufactured therewith.

The invention relates to a method for the manufacture of a rectangular box or crate of thermoplastic material, as well as to a box or crate manufactured in such a manner, as well as to elements which can be used for the manufacture of such a box or crate.

It is known to manufacture a box or crate from thermoplastic material.

However, a drawback here is that for larger dimensions of such a box or crate, very large molds are necessary, while the stiffness of a large-sized box or crate often leaves something to be desired.

The invention contemplates an improved method for the manufacture of a box or crate of thermoplastic material, as well as a box or crate manufactured using such a method.

The invention further contemplates simple elements from which such a box or crate can be built. ;

To this end it is proposed according to the invention to make use of a method in which the box or crate is assembled by sliding a number of preformed elements against each other, four of which consist of integral corner parts, consisting of three perpendicular surfaces, which planes are substantially double-walled in such a way that at least two% of a hollow channel is cut out and the elements are placed contiguously, 8201484 J? Reinforcements are placed in the hollow spaces, after which the wall parts of adjacent elements are joined together.

To illustrate the invention, an exemplary embodiment will now be described, wherein further details will also become apparent.

Fig. 1 schematically shows, with exploded parts, a box or crate according to the invention; Fig. 2 schematically shows a top view of a box or crate 10 composed of four parts and Fig. 3 shows a side view thereof; Fig. 4 shows in cross section: a detail of a bottom of a box or crate according to the invention; Fig. 5 shows in cross-section a detail of a side wall 15 according to the invention; Fig. 6 schematically shows in top view the connection of the reinforcing elements at the corner of a box or crate; Fig. 7 shows a dovetail joint between a horizontal reinforcement element and an upright; FIG. 8 schematically shows the formation of a channel for a reinforcing element using localized depressions in a wall.

Fig. 9 shows a variant embodiment according to the invention.

Fig. 1 shows a box or crate according to the invention with disassembled parts.

In this case, the box or crate is built up of four substantially uniform pieces 1 and 3, as well as two mirror-shaped elements 2 and 4 formed therewith.

In addition, in this example, use is made of two A intermediate elements 5 and 6. The elements are in principle ol1 constructed from full-walled thermoplastic material, so that these 1 are made in a simple manner, eg by injection molding, but for example 8201484 \. -

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It is possible to produce a selection by means of a blowing process, in which hollow channel-like passages are formed in the elements. These channel-shaped passages are located in the bottom at 7 and in the side wall at 8 and 9.

Reinforcing elements, such as of wood (10, 11 and 12) are preferably arranged in these recesses.

The elements 1, 2, 3, 4 resp. 5 and 6 are easy-to-manufacture plastic elements

The reinforcing elements - in particular of wood, although rigid plastic profiles, metal profiles and the like can also be used for this - make it possible to

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combination obtained from a light inexpensive and yet; sufficiently dimensionally stable construction.

Preferably, the bottom is reinforced by sliding the elongate-reinforcing elements 11 into the through passages 7. The walls are reinforced by the horizontal reinforcing elements 11 in the passages 8 and the horizontal reinforcing elements 12 in the passages 9.

After the elements 1, 5 and 4 have been pushed together with the reinforcing elements 10 and 11 and the elements 3, 6 and 2 with also reinforcing elements 10 and 11, the adjoining seams can be welded together or optionally in another way. be connected together.

The two composite parts can then be pushed together, whereby the reinforcing elements 12 are arranged in the passages 9 with which the adjacent seams of the two composite parts are connected to each other.

It is noted that the bottom is preferably reinforced in one direction only by means of solidification elements 11. As a result, the bottom is suitable for being picked up by means of a forklift, as is customary for pallets.

In Fig. 2, a plan view is shown in top view, in which the box is exclusively built up of 4 identical elements 1, 2, 3 and 4, without the use of intermediate elements.

Pig. 3 shows a side view of this, using three reinforcing elements 11. While in this case, blocks 13 are shown below, with which the bottom can rest on the ground.

In Fig. 2 the different seams to be welded are indicated by 14. It is also shown in Fig. 2 that the corners are chamfered at 15. If desired, vertical uprights 16 can be provided in the hollow-shaped corners as reinforcing elements, so that it is better to stack the box or crate.

It should also be noted that the central reinforcing element 11 in figures 2 and 3 is accommodated in a laterally open channel-shaped space in the various elements r of the box, wherein after welding or otherwise connecting the corner elements a more or less closed channel for this middle reinforcing element is formed.

In fig. 4 a part of a wall is shown on a larger scale. In principle this consists of an inner wall 20 and an outer wall 21. If desired, foam can be applied in the cavities not used for reinforcing elements, although this is not necessary. ?

By pressing the outer wall 21 inwardly at 23, a channel 22 is formed in which one of the reinforcing elements can be received. This channel 22 corresponds to channels 8 and 10 respectively. 9 in fig. 1.

When this pressing-through of the plastic material is still plastic, a fusion of the outer and inner wall takes place in the corners at 23.

Fig. 5 shows a variant for a double-walled box element {MÊ, which also shows channel 22 for a gil reinforcement element. In this case, the element \ is closed at 25 on one side, while open at 26 is 3p. It will be clear that the inner and outer walls can also be connected to each other in the case of the 3 8201484-5 ff.

The bottom will be constructed in the same way as the walls.

Preferably, the inner wall 20 is smooth, but if desired the outer wall can also be smooth, the more profiled part being located on the inner side.

Fig. 6 is a schematic plan view of the connection of a horizontal reinforcing element 10, a horizontal reinforcing element 12, and an angle reinforcing piece or post 16. Because the horizontal reinforcement pieces 10 and 12 are chamfered at one end, and extend beyond the corner 26 of the vertical post 16, these elements join together in shape, thus preventing the horizontal reinforcement elements from drifting out, as they are supported thereby by the styles 16.

A variant of this is shown in Fig. 7, in which an upright or post 16 is interrupted and wherein the lower parts are indicated by 16 '. The horizontal reinforcement piece 12 is dovetail-shaped 27 at the ends, so that a form-fitting connection of the horizontal reinforcement piece 12 and the vertica- | The upright 16 and 16 'respectively are obtained.

25. Fig. 8 is a diagrammatic side view of a double-walled element in which the passage, in this case indicated by 28, is not delimited by a fully pressed-through wall part, but in which rib-like embossings 29 and 30 are arranged in one or both wall parts, Λ 30, the ends of which lie in one plane, such.

that passage 28 is bounded.

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In Fig. 9 a corner element is schematically seen from the inside. The vertical wall parts are herein described in accordance with the foregoing, but the third wall part perpendicular thereto is limited to an edge 31, which form one whole with the two wall parts.

After connecting 4 of such elements together, an underside open is obtained, bounded by the projecting edges 31. A bottom element can then be attached to these edges, schematically indicated by 32. Naturally, this bottom element can also be attached. are again double-walled and provided with reinforcement pieces, but for certain applications a wooden or an iron bottom or a bottom of other material could also be used.

In fig. 9 the bottom 32 is placed under the edge 31, of course the bottom 32 can also be fixed on top of the edge 31.

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Claims (10)

1. Method for the manufacture of a rectangular box or crate of thermoplastic material, wherein the box or crate is assembled by sliding a number of preformed elements, of which four elements consist of integral corner parts consisting of three perpendicular to each other surfaces, which surfaces are substantially double-walled, such that in; at least two of which a hollow-shaped channel has been cut out in the case of 10 and wherein the elements are placed next to one another, whereby reinforcement pieces are placed in the hollow-shaped spaces, after which the wall parts of adjacent elements are connected to each other. 2. Method according to claim 1, characterized in that the adjoining longitudinal edges are joined together before the elements are joined. 3. Method according to claim 1 or 2, characterized in that for the elements for the construction of a box or crate, apart from four corner parts, use is also made of at least one additional element comprising a bottom part and at least one wall part in which also continuous channels are provided for receiving reinforcing elements. K Method according to any one of the preceding claims, characterized in that the adjoining elements are fastened to each other by means of detachable connecting parts. 5. Box or crate made of thermoplastic material manufactured according to the method according to one of the preceding claims, comprising substantially double-walled elements, wherein reinforcing elements are arranged in the hollow spaces recessed in the double-walled elements. 8201484 - 8 - «r • * v Box or crate according to claim 5, characterized in that the reinforcing elements are formed by wooden pole parts arranged in the hollow channels of the bottom. 7. Box or crate according to claim 6, characterized in that reinforcing elements are arranged in the side walls of the box or crate. Box or crate according to one of Claims 5, 6 or 7, characterized in that reinforcement elements are arranged in the corners of the box or crate. j Box or crate of thermoplastic material manufactured according to the method according to any one of claims 1 to 4, characterized in that each integral corner part; consists of double-walled wall elements, which form one whole with a support for the bottom-forming inward-facing edge, wherein a separate bottom is attached after the joining of the corner parts. the integral bottom support edge is attached. 10. Elements for manufacturing a box or crate using the method of claim 1, evidently intended for a box or crate according to any one of claims 5-9. £ U 8201484