EP0333229A2 - Carrying handle - Google Patents

Abstract

The carrying handle has two carrying bars (12) and (32) which form a hinge (46) at their ends, which hinge allows the carrying bars (12, 32) to engage on one another, on the one hand, and, on the other hand, allows an attachment, which is secure against being pulled out, even in the case of a heavily loaded bag, welded onto the carrying bars (12, 32). <IMAGE>

Description

The invention relates to a handle assembly for plastic bags, according to the preamble of claim 1, and a reusable bag according to the preamble of claim 10.

For plastic bags that are suitable for carrying larger and / or heavier parts and can be used several times, instead of the usual pure polyethylene plastic bags without a handle, those with a welded-on handle are used. The carrying handle uniformizes the introduction of force into the bag material, so that the carrying capacity of the bag is improved.

It is known to use two almost identical support brackets, which are welded to the plastic bag on both sides of the loading and unloading opening.

When loading such bags with comparatively bulky and / or heavy objects, however, there is a risk that the objects push apart the support beams, so that the handles on the support brackets are more difficult to handle and also on the support bracket ends due to the stiffness jumps from the comparatively strong support bracket material to the comparatively soft bag material there is a risk of tearing and detachment of the bag material from the carrying handle. Accordingly, it is known to either connect the carrying brackets in the closed state to one another by clips or to provide the ends with pins / eyelet connections, so that the carrying brackets can bend apart in the center without the ends of the carrying brackets loading the bag material.

While the connection of the carrying brackets via clips is now quite widespread in reusable plastic bags, the pin / eyelet connection has due to the manufacturing technical difficulties never became more important. To create the vertical pivot axis with the vertical mounting of the eyelet around the pin, it is namely necessary to create an undercut that is difficult to produce by injection molding. The dividing line of the molds lies essentially in the middle along the longitudinal plane of each support bracket, so that the end area of the eyelet requires an undercut. On the other hand, the alignment of the axes with respect to the carrier cannot be changed without the end connection losing its essential function.

In order to overcome these disadvantages, it has already been proposed to use a film hinge instead of the pin / eyelet connection, which was incorporated into a tab, the end of the tab remote from the bracket being provided with a clip connection which was designed to snap into the other bracket.

The problem here, however, was that users misunderstood the importance of the tabs with the film hinges in that they were opened when the bag was loaded, so that the desired effect was again negated. In order to maintain the most favorable load condition, the support brackets could also be clipped together in this solution.

In contrast, it is an object of the invention to provide a handle assembly according to the preamble of claim 1 and a reusable bag according to the preamble of claim 10, which on the one hand is inexpensive to manufacture and on the other hand allows optimal force transmission from the handle to the bag even under unfavorable load conditions.

This object is achieved by claims 1 and 10, respectively. Advantageous further developments result from the subclaims.

By providing a true joint function with a joint socket and a joint head, the swivel joint according to the invention can be loaded in a wide range in a cleanly guided manner. It is immediately clear to the buyer that he should leave the end connection as a hinge if possible and not dismantle it. On the other hand, the design with an articulated socket and articulated head also offers advantages in terms of production technology, since it is possible to produce the support brackets with injection molds which do not require pulling wedges or the like.

It is particularly expedient if the joint head is designed as a transverse pin which can be pushed into the joint socket through an opening provided in the slideway of the joint socket. The cogging force is dimensioned so that it is impossible to disengage under normal load conditions. Here, the effect can be exploited favorably that the opening lies with its opening plane in the longitudinal direction of the support bracket, while when the support bracket is bent apart, the tensile force of the joint head against the socket joint increasingly moves away from the normal to the opening plane and finally acts completely perpendicular to inclined surfaces, which are attached to the side of the opening in the socket.

This provides a pull-out force that corresponds to the breaking load of the material used for the support bracket. The swivel range of the socket and joint head against each other is up to 180 °, with a circular cross-sectional configuration of the joint head being favorable for large swivel paths.

In contrast, a more blocking effect in the position of the worst force application angle can be achieved with an oval or elliptical design of the cross section of the joint head. This makes it possible to measure the excess of the diameter of the joint head relative to the opening in the joint socket by pivoting the support bracket against one another, for example in the 90 ° position.

The manufacture of the support bracket arrangement according to the invention is fairly simple in terms of injection molding, since no complicated shapes are required. For the acetabular support bracket, the dividing line between the upper and lower molds in the region of the swivel joint can be pulled down to the level of the opening in a manner known per se in order to be able to keep the two injection molds free of undercuts.

It is advantageous if the thickness of the joint does not exceed twice the thickness of a support bracket. Then it is possible to achieve a flat outer surface in abutting condition of the carrying bracket, which promotes the attachment of the carrying bag material by welding or, if necessary, by gluing.

It is particularly expedient if the diameter of the joint head in the projection onto the opening in the joint socket in the pivoted-apart position of the support bracket is larger than in the abutting position of the support bracket. This opens up the possibility of giving the support bracket arrangement in the pivoted-down position an improved hold compared to the adjacent position of the support bracket.

It is also particularly expedient if the joint head has laterally projecting transverse pins which are slidably guided on inclined surfaces of the joint socket, in particular on projections. As a result, the forces occurring can be intercepted symmetrically, the direction of the force introduction can advantageously be set in certain areas by angling the inclined surfaces.

Furthermore, it is particularly expedient for the swivel joint to have a thickness in the abutting state of the support bracket which corresponds at most to twice the thickness of a support bracket and in particular is equal to the sum of the thicknesses of the support bracket. This prevents the joint from projecting outwards, which would be disadvantageous for a variety of reasons.

By means of a cranked design of the joint head towards the socket support bracket, the forces introduced can be better controlled, which also opens up the possibility of increasing the blocking forces with the pivoting angle of the bracket apart. This can take into account the fact that the plastic materials used show a certain resilience, so that it is favorable that the parts of the joint which support the form fit with increasing application of force, as is done by pulling the bag open under load, the resistance to the forces introduced oppose.

According to a further, particularly advantageous embodiment, the joint socket is formed essentially on one side, so that the joint head extends towards the center of the support bracket in the pivoted-off state. This provides a particularly large contact surface for the joint, which is stable even under unfavorable load conditions.

Further details, features and advantages are explained in more detail from the following description of several embodiments with reference to the drawing.

• Fig. 1A eine Seitenansicht von innen auf das Ende eines Gelenk­pfannen-Tragbügels;
• Fig. 1B eine Seitenansicht von innen auf das Ende eines erfin­dungsgemäßen Gelenkkopf-Tragbügels;
• Fig. 2A eine Seitenansicht von außen auf das Ende des Trag­bügels gemäß Fig. 1a;
• Fig. 2B eine Seitenansicht von außen auf das Ende des Trag­bügels gemäß Fig. 1b;
• Fig. 3 einen Schnitt durch ein Drehgelenk am Ende einer erfindungsgemäßen Tragbügelanordnung, gesehen in Richtung der Pfeile III-III gemäß Fig. 1A;
• Fig. 4A einen Schnitt durch eine weitere Ausführungsform eines erfindungsgemäßen Drehgelenks, wobei die Trag­bügel aneinander anliegen, wobei die Schnittebene derjenigen von Fig. 3 entspricht;
• Fig. 4B den Schnitt gemäß Fig. 4A, wobei die Tragbügel im Win­kel von etwa 90° voneinander abgeschwenkt sind;
• Fig. 5 einen Schnitt durch eine weitere Ausführungsform eines erfindungsgemäßen Drehgelenks, wobei der Schwenkzustand gemäß Fig. 4B dargestellt ist; und
• Fig. 6 eine schematische Ansicht eines erfindungsgemäßen wiederverwendbaren Beutels.

Show it:

• 1A is a side view from the inside of the end of an acetabular support bracket;
• 1B is a side view from the inside of the end of a joint head support bracket according to the invention;
• 2A shows a side view from the outside of the end of the carrying bracket according to FIG. 1a;
• FIG. 2B shows a side view from the outside of the end of the carrying bracket according to FIG. 1b;
• 3 shows a section through a swivel joint at the end of a support bracket arrangement according to the invention, viewed in the direction of the arrows III-III according to FIG. 1A;
• 4A shows a section through a further embodiment of a swivel joint according to the invention, the support brackets abutting one another, the section plane corresponding to that of FIG. 3;
• FIG. 4B shows the section according to FIG. 4A, the support brackets being pivoted away from one another at an angle of approximately 90 °;
• FIG. 5 shows a section through a further embodiment of a swivel joint according to the invention, the swivel state being shown in FIG. 4B; and
• Fig. 6 is a schematic view of a reusable bag according to the invention.

In FIG. 1A, one end 10 of a joint socket support bracket 12 is shown in a side view, in a view from the inside, ie from the side of the joint head support bracket, not shown. The end 10 has an opening 14 which is delimited at the end by a crossbar 16 and at the top and bottom by two joint half-shells 18 and 20, the detailed design of which is shown in FIG. 3, and by a support bracket body 22. The joint half-shells 18 and 20 together form a joint socket 21, the more precise design of which will be explained further below.

The crossbar 16 and the support bracket body 22 are arranged on the same plane, which is surmounted by the raised joint half-shells 18 and 20. The joint half-shells 18 and 20 each have a U-shaped passage recess part 24 or 26, which belong to the opening 14, but the clear width of the passage recess parts 24 and 26 is less than the clear width LW of the opening 14 in the region of the crossbar 16 . Accordingly, the legs of the U-shaped passage recess parts 24 and 26 are delimited by projections 28, which are essentially symmetrical and have inclined surfaces on their undersides, not shown, which form the joint socket 21.

1B shows an end 30 of an associated joint head support bracket 32, again from the side facing the joint socket support bracket 12. The joint head support bracket 32 has a support bracket body 34, a neck 36 being formed on the end 30 and carrying a cross pin 38. This arrangement forms an articulated head 40. In this embodiment, the cross pin 38 is substantially cylindrical and has hemispherical or flat ends.

The longitudinal extent of the transverse pin 38 essentially corresponds to the longitudinal extent of the opening 14 from the base leg of the U-shaped passage recess part 24 to the base leg of the U-shaped passage recess part 26.

The diameter D of the cross pin 38 is larger than the clear width LW between the side legs of the U-shaped passage recess parts 24 and 26. However, the projections 28 on the side of these side legs are somewhat elastic. Furthermore, the cross pin 38 is also less elastic, since all parts of the support bracket 12 and 32 are made of plastic such as polyethylene or polypropylene. Accordingly, it is possible to apply a compressive force between the ends of the two brackets 12 and 32 to lock the cross pin 38 at the end 10 of the socket bracket 12.

The end 10 in the view rotated by 180 ° with respect to FIG. 1A is shown in FIG. 2A. The joint socket 21 has a guide shaft 42 which can be seen in more detail in FIG. 3 and is delimited on each joint half-shell 18 and 20 by two inclined surfaces 44 which end in the projections 28.

FIG. 2B shows the view of the support bracket 32 rotated by 180 ° compared to the illustration in FIG. 1B. The neck 36 runs in both views in the same plane as the support bracket body 34. Compared to this plane, the cross pin 38 is bent to the socket support bracket 12, so that the axis of rotation of the joint is shifted toward the center plane of the support bracket 12 and 32. In this embodiment, however, the offset is not so great that the pivoting of the support brackets 12 and 32 from one another could be impaired even at very large swivel angles such as almost 180 °.

From the illustration according to FIG. 3, which shows a swivel joint 46 consisting of the joint head 40 and the joint socket 21 in the locked state of the support brackets 12 and 32, it can be seen that the support bracket 32 can be pivoted away from the support bracket 12 by approximately 180 ° without the swivel 46 disengaging. It is particularly advantageous here that the transverse pin 38 is then no longer pressed in the direction of the opening 14 in the socket 21, but rather is pressed against the inclined surface 44a at the end. In this embodiment, the carrying brackets can accordingly be pivoted apart from one another by 180 °, which corresponds to a loading and unloading opening of a bag welded to the carrying brackets spanned up to the maximum extent, without any disengagement. The load capacity limit corresponds almost to the breaking load of the materials used for the bracket bodies 22 and 34, because the Joint half-shells 18 and 20 or the neck 36 would already have to be torn in order to enable the support bracket bodies 22 and 34 to be separated from one another by tensile force when the support bracket 12 and 32 is in the fully pivoted-away state.

Another embodiment of the support bracket arrangement according to the invention can be seen from FIG. 4A. The joint head 40 with the cross pin 38 in this case has an oval cross section, the longitudinal axis of the oval cross section extending at right angles to the longitudinal axis of the support bracket 32 and the transverse axis of the oval cross pin 38 extending parallel to the longitudinal axis of the support bracket 32. In this embodiment, in the state shown in FIG. 4A of the support brackets 12 and 32 resting against one another, the transverse pin 38 bears against the projections 28, but not against the guide shaft 42. The clear width LW is also smaller in this embodiment than the diameter D along the (shorter) transverse axis of the cross pin 38 and at the same time considerably smaller than the diameter D _{H of} the cross pin 38 along its (longer) main axis. In contrast, the width of the guide shaft 42 is at least as large as the diameter D _{H of} the cross pin 38, so that pivoting of the support bracket 32 relative to the support bracket 12 is easily possible.

In Fig. 4B it can be seen that when the support bracket 32 is pivoted through 90 ° relative to the support bracket 12, the joint head 40 bears against the inclined surfaces 44 over the entire surface and at the same time the cross pin 38 is pulled out through the opening 14 due to the comparatively large projection dimension of the projections 28 in the socket 21 is impossible.

While the illustrated embodiments of the support bracket arrangement according to the invention show a swivel joint 46 consisting of a joint head 40 and two joint half-shells 18 and 20, it is also possible to use a continuous joint socket 21 which encloses a transverse pin 38 which does not have a neck 36, but held over two longitudinal pins formed at the ends.

Furthermore, while in the illustrated exemplary embodiments the support bracket 12 has two joint sockets at each end 10 and the support bracket 32 has two joint heads at each end 30, it is also possible for each support bracket to have a joint head 40 at one end 30 and a joint socket 21 at the other end 10 to be provided. This is particularly favorable if center symmetrical handles are attached to the carrying brackets, since then identical shapes can be used for the production of both carrying brackets 12 and 32.

Of course, however, it is also possible to provide hooks or eyes in the center of the carrying brackets instead of the handles.

5, the joint socket 21, relative to the opening 14, is displaced on one side toward the center of the support bracket 12, so that the opening 14 is practically provided on the outside of the joint socket 21. Correspondingly, the cross pin 38 is strongly bent, so that in the pivoted-down state shown in FIG. 5, with respect to the opening 14, it also extends towards the center of the support bracket and accordingly along the fairly long inner inclined surface 44 of the socket 21 . In this embodiment, the inner inclined surface 44 is arranged practically horizontally. The width of the socket 21 is chosen to be somewhat larger than the diameter D _{H of} the cross pin 38 along its main axis. This makes it possible for the joint head 40 to pull further into the joint 46 when the support bracket 32 is pivoted further with respect to the support bracket 12, which counteracts the forces which occur.

6, a bag 50 is shown, which is attached by suitable means in the carrying brackets 12 and 32. For example, the bag 50 can be glued or welded on. With its upper edge, the bag 50 completely surrounds the carrying brackets 12 and 32, so that it beats over the ends 10 and 30 of the carrying bracket. In any manner known per se, a hanger 52 or a carrying handle can be attached to both carrying brackets 12, 32. The bag is characterized by great stability in spite of low manufacturing costs and is therefore quite suitable for reuse.

Claims (13)

1. Support bracket arrangement for plastic bags or the like., With two support brackets connected at their ends, characterized in that the end connection as a swivel joint (46) from a joint head (40) on a support bracket (32) and a joint socket (21) on the other Support bracket (12) is formed. 2. Support bracket arrangement according to claim 1, characterized in that the joint head (40) is designed as a transverse pin (38) with a substantially vertical pivot axis. 3. Support bracket arrangement according to one of claims 1 or 2, characterized in that the joint socket (21) has an opening (14) for the joint head (40). 4. Support bracket arrangement according to one of the preceding claims, characterized in that the joint head (40) in the socket (21) is rotatably mounted in a snap-in manner. 5. Support bracket arrangement according to one of the preceding claims, characterized in that the diameter (D, D _H ) of the joint head (40) in all rotational positions at least as large as the clear width (LW) of the opening (14) in the joint socket (21) is. 6. Support bracket arrangement according to one of the preceding claims, characterized in that the cross section of a cross pin (38) forming a joint head (20) is substantially oval or elliptical and that the joint socket (21) has two projections (28) delimiting the opening (14). has, the summed projecting length at least the difference between the short (D) and the long (D _H ) transverse axis of the ellipsoidal or oval cross section of the cross pin (38). 7. Support bracket arrangement according to one of the preceding claims, characterized in that the joint head (40) on the joint head support bracket (32) and the joint socket (21) on the joint socket support bracket (12) are integrally formed. 8. Support bracket arrangement according to one of the preceding claims, characterized in that the joint socket (21) to the center of the support bracket (12, 32) is enlarged and the joint head (40) from the joint head support bracket (32) on the joint socket support bracket ( 12) protrudes, in particular approximately by the thickness of the socket support bracket (12). 9. Support bracket arrangement according to one of the preceding claims, characterized in that the joint socket (21) has an oversize compared to the long transverse axis (D _H ) of the cross pin (38). 10. Reusable bag, in particular made of plastic, with a loading and unloading opening surrounded by carrying brackets (12, 32), the bag material being flat on the carrying brackets (12, 32) is fastened and the carrying brackets (12, 32) are connected at their ends, characterized in that the end connection consists of a swivel joint (46) with a joint head (40) on a carrying bracket (32) and an articulated socket (21) on the other bracket (12). 11. Bag according to claim 10, characterized in that the bag material up to the ends (10, 30) of the support bracket (12, 32) is attached to the support bracket (12, 32) and completely surrounds it horizontally. 12. Bag according to claim 10 or 11, characterized by the characterizing features of one of claims 1 to 12. 13. A bag according to claim 10 or 11, characterized in that the joint head (40) is designed as a component (40) which snaps into the socket (21).

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