DE1486218A1 - Hinged-lid folding box with the box body that can be expanded before closing - Google Patents

Description

Hinged lid folding box The invention relates to a hinged lid folding box with laterally hinged to the lid, which can be connected to the side walls of the box base Lid citizen flaps and a corner lock located at the corners of the box base of pairs of folding triangles with the side walls of the lower part of the box by means of external ones T-shaped locking tongues and internal recesses corresponding to the T-shaft.

In the case of bulk packaging of food by means of automatic devices, especially when it comes to packaging products that are relatively naughty have moderately high liquid content, such as, for example Fruits and pre-cooked groceries become boxes with pairs of folding triangles the corners because of the tightness and drip resistance preferred by the box body as a result of this corner construction.

Health packaging regulations make a seal the Packaged food required to prevent external contamination. this will generally by wrapping the box with a paper or plastic sheet caused which is then glued tightly at the edges, the wrapping is because of the additional material and expensive because of the wrapping and gluing processes, When filling and closing boxes in an automatic line it is important that ß the surface of the contents below the top of the box body lies, so that when the lid is subsequently closed there is a disruption.

For this purpose, facilities are often used that the content compress, for example stamps or blades, which open the box contents squeeze the desired height below the top of the box body. It is important that the shovel or the punch touches the edges of the body of the Sahach lbody Do not touch it, otherwise crushing one or two will break the box body Box walls is damaged.

Filling the box is made considerably easier when during the filling of the chaohtel body is stretched in the direction of the length and the side, i.e. when the box body is expandable and when the expansion of the box body then be removed again before sealing or during sealing can to bring the box body to the correct size.

The previously known folding boxes with corner folding triangle pairs allow no such expansion and contraction.

There are hinge-lid folding boxes are known, the lid with the side provided with lid side flaps connectable to the box bottom part side walls are. The corner construction of the known boxes faces outside the box base lying pairs of folding triangles, which are arranged in the middle on the outer folding triangles T-shaped locking tongues with the corresponding T-shaft in the box wall provided recesses are lashed.

Of the The box base of the well-known boxes is not expandable, as the outer pairs of folding triangles prevent expansion, furthermore, there is a step-like @ da the folding triangle pairs in the known boxes on the Eclsen protrude outwards by at least twice the thickness of the paperboard.

This prevents the lid flaps from sticking to the box walls, and the well-known Klappdekkelfaltsohachtel is for this reason with slots in the Nesting part provided with insertable tongues, the connection of the lid flaps with the box bottom part walls by means of tongues and slots then normally requires another processing of the box.

A hinged lid folding box with hinged on the lid at the side @, top side flaps connectable to the box bottom part side walls and one at the corners of the lower part of the schaohtel there are corner locks of pairs of folding triangles with the side walls of the lower part of the shell by means of external T-shaped Locking tongues and internal recesses corresponding to the T-shaft is improved according to the invention in that the locking tongues are made of the box wall material cut out and provided the recesses in the folding triangle on the inside are.

Expediently Appropriately, the middle one @ Old triangle left out for the locking tongue neck part, by the invention a Schaohtel structure is thus created, which makes it possible that the folding box blank Erected and locked with considerable strength in the expandable state can be, through the arrangement of the locking tongues used and of the folding triangle pairs, whereby the inherent stiffness of the cardboard supports the expansion, The expanded box is automatically closed when the lid is closed reduced to its proper size.

The new training has the further advantage that three Deokel flaps with completely flat side walls of the bottom part of the box without impairment can be glued on the part of the Faltdreieokpaare. This leads to a sure liquid-tight box that does not have to be wrapped in order to meet the tightness requirements Sufficient for food boxes, In the drawing is an embodiment of the invention, namely Fig. 1 is a plan view of a blank for the folding box with hinged lid according to the invention, FIG. 2 fig. 2 a perspective view of a locked, but expanded folding box, which is erected from the blank shown in Fig. 1, Fig. 3 is a plan view in the enlarged wet stick on the left front corner of the box shown in Fig. 2, ring. an external view of the box shown in Fig. 3, Fig. 5 is a sectional view the box that shows the contraction that occurs when the corner gussets are opened occurs and FIG. 6 is a perspective view of the heat-sealed box, The blank B shown in Fig. 1 is. preferably with a layer of one thermally bondable thermoplastic adhesive coated. Such a coating also serves to make the cardboard moisture-proof, the blank has a bottom 11, on the sides of which side walls 12 and 13 along fold lines 14. and 15 are hinged. Bndwandungen 16 and 17 are at .. the ends of the floor 11 hinged along fold lines 18 and 19.

Bin Teckel 20 is on the side wall 12 along a lid hinge line 21 hinged. Side flaps 22 and 23 extend along fold lines 24 and 25 from DeLrkel 20. A front flap 26 is on the lid along a front fold 27 hinged Landings 12, 17, 13 and 16 of the box base of the blank are connected to one another by folding triangles 28, 29, 30 and 31, which are attached to the corresponding @ the walls along fold lines 32, 33, 34, 35, 36, 37, 38 and 39 are hinged. Each pair of triangles has two triangles, which are hinged to each other and flat on top of each other are foldable, namely along fold lines 40, 41, 42, and 43. The triangles are with 44, 45; 46, 47; 48, 49 and 50, 51 numbered.

In the cut, precautions have been taken to avoid the pairs of folding triangles to lock with the wall. There are T-shaped locking tongues 52, 53, 54 and 55 provided in the box walls, which are arranged and designed in such a way that that these locking tongues in corresponding recesses in certain gap triangles intervention. For this purpose, incisions are arranged at a distance from one another 56, 57; 58, 59; 60, 61 and 62, 63 provided in the folding triangles 44, 47, 48 and 51, The remaining triangles 45, 46, 49 and 50 are spawned at 64, -65, 66 and @nd 67.

There.

Since the interlocks Bür the four pairs of folding triangles are the same it is sufficient to describe only the interlocks on the left front corner of the box, The T-shape tongue 54 has a wide head part 68 and a narrow shaft or neck part 69 which connects the head 68 to the remaining part of the end wall 16. The neck portion near the inner end of the incisions 70, 71 acts as a hinge for the Tongue when this out of the plane of the end wall 16 for the purpose of locking the latter with the triangle 48 is bent out. It is usually not an additional weakening the cardboard, such as a notch or fold, required around this Trigger joint action.

The distance between the outer cuts 60 and 61 is slightly larger than that Width of the neck portion 69 of the T-shaped tongues, but considerably smaller than the width of the head part of the T-shaped flap. This structural detail is basically known.

The recess 66 is provided to avoid unnecessary cardboard thickness in the Avoid locking area.

The cut-to-size can easily be done by hand or or preferably by a mechanical box forming device with stamp and Die formed into a box, this mechanical device being the Walls of the blank in a vertical or almost vertical position opposite the bottom and at the same time the pairs of folding triangles inside the box folds. A locking device then pulls the T-shaped tongues far enough into the box, around the headboards, e.g. 68, behind the edges of the incisions 60, 61 to bring.

The box thus formed is shown in FIG.

The wall 13 is because of the rigidity or the resistance to folding the cardboard is slightly arched at the bottom fold line 15. The top edges of the end walls are slightly outside the vertical position. lung. The corner fold lines 34, 35 and 36, 37 are not yet in contact with each other and the pairs of folding triangles are still not pulled together tightly, this is shown on an enlarged scale in FIG. It follows that the box body in the longitudinal direction by twice the Strekce d, e, measured at the upper edge, is extended, and is perpendicular to it the @ box length measurement enlarged by the distance d, s, as can be seen in particular from Fig. 3, the lengthening of the box is the result of the oblique AAA «. '' '' * '-'.'- & r ° @ @@ @ n, s Wt: Y r ~ ..

Position of the T-shaped tongue 54 and in particular the length of the holding part 69.

The box is locked tight enough for this to be handled and locked can be filled, after which the lid 20 is turned into its closed position g is folded and the side flaps flat against the box walls 16, 13 and 17 will.

Fig. 5 shows the left part of the box in the flattened and closed and glued state.

The folding down of the lid side flaps has the upper edge of the The end wall 16 is brought into an aligned position with respect to the cover flap fold line 24 and the two corner fold lines 36 and 37 are drawn towards one another. The hatching in the drawing indicates that the front flap 26 for the purpose of this illustration is cut off. The right side of the figure shows the offset d e of the upper edge of the end wall 17 opposite the side flap fold line 25 * The position of the flaps in Fig. 5 is only to explain the offset and the aligned position shown. In practice, the folding down of the side flaps 22 and 23 begins before the Lid 20 reaches its horizontal closed position and the alignment of the End walls 16 and 17 takes place without that the danger arises that the cardboard throws itself at the fold lines 24 and 25, so heat and pressure then act against the flaps 22, 26 and 23 and cause these flaps essentially adhere to the entire surface of the box walls 16, 13 and 17, since the Sands are flat and free ton protrusions.

The sealed box is tight and does not require any further wrapping.

Patent claims:

Claims (2)

P a t e n t a n t a n t r u c h e 1) Hinged lid folding box with on the lid laterally hinged lid side flaps that can be connected to the box bottom part side walls and one located at the corners of the Schactelunterteils corner lock of Folding triangle pairs with the side walls of the box bottom by means of lying on the outside T-shaped locking tongues and internal recesses corresponding to the T-shaft, marked by 1 that the locking tongues (e.g. 54) are made from the box wall material (16, 170 cut out and the recesses (e.g. 60, 61) in the one on the left side Folding triangles (e.g. 48) are provided. 2)) Folding box according to claim 1, characterized in that the Middle folding triangle (e.g. 49) left out for the locking tongue neck part (e.g. 69) is.