Foldable transport device for bicycles

Abstract

Disclosed are a transport device for a bicycle with a central section and two side sections, wherein the side sections can be folded upwards from a lying position into an upright position, preferably into a standing position, wherein a multi-part backrest is provided and lateral backrest sections can be folded away from the side sections to the rear, and a bicycle with such a transport device.

Description

[0001] Disclosed is a foldable transport device, in particular for bicycles, according to the preamble of claim 1 and a bicycle.

[0002] Bicycle carriers, such as front racks for safely transporting bulky items like crates of drinks and bags, are usually mounted on the head tube and have a minimum width that far exceeds the conventional width of rear carriers. A problem with these carriers is that their width makes it difficult to park the bicycle, for example, against bike racks, walls, or fences, as the carrier protrudes significantly beyond the bicycle frame.

[0003] Rear carriers are known to have side panels that hang downwards when not in use. A disadvantage of this design is that it can only be applied to front carriers to a limited extent, specifically when the front carrier is attached to the bicycle fork and thus moves with the steering of the front wheel. However, attaching a front carrier to the head tube is advantageous, as this has a stabilizing effect on the bicycle both while riding and when stationary.

[0004] DE202021104509U1 shows a front frame-mounted support structure whose transport area can be enlarged by means of a screw-on U-shaped extension.

[0005] The prior art is known from DE 31 14 823 A1. This document describes a foldable bicycle basket for rear mounting on a luggage rack. The luggage rack can be raised from a hanging position to a transport position in which it can then hold goods. However, such a basket is not suitable for mounting on the head tube side, as it hangs down on both sides of the wheel when folded.

[0006] Furthermore, a transport device for attachment to a bicycle luggage carrier is known from FR 942 215 A. This document describes a system in which side sections are attached to both sides of a central section. The side sections can each be pivoted about a pivot axis extending in the longitudinal direction of the bicycle from an outer, horizontal position, to an upright position, and finally to an inner horizontal position. In the outer horizontal position, the transport surface consists of the central section and the horizontal side sections. In the upright position, the transport surface is formed by the central section and bounded laterally by the upright side sections. Front and rear boundaries are formed by spring-loaded brackets, so that the transport device then functions as a basket.Two cross arms prevent the side panels from tipping out of their upright position. Each cross arm is firmly connected to one of the brackets and has a hook section at its free end for partially gripping the side panels. In the inner, reclining position, the central section also forms a transport surface, but without lateral boundaries from the side panels.

[0007] WO 2008 / 028 380 A1 shows a foldable and removable bicycle basket. CN 2 936 900 Y shows a foldable basket for a scooter. Further transport devices for bicycles can be found at www.fahrradteile-katalog.de.

[0008] Furthermore, a transport device for a bicycle is known from the applicant's German patent DE 10 2023 103 476.6, the side sections of which, with bottom and back sections, are pivotably mounted on a longitudinal side of a central bottom section. The side sections can be folded upwards from a lying position about a pivot axis extending in the longitudinal direction into a preferably upright or nearly upright standing position. At least one side section, in addition to pivoting inwards in the longitudinal (axial) direction, is also displaceable such that, when both side sections are pivoted inwards, their back sections can pass each other without collision.

[0009] The purpose of the invention is to create an alternative foldable transport device.

[0010] The problem is solved by a transport device having the features of claim 1.

[0011] A transport device for a bicycle according to the invention has a central section, two side sections forming a transport surface, and a multi-part back section for the rear boundary of the transport surface. The side sections are each pivotally mounted on the central section about a pivot axis extending along the longitudinal axis. A back section is assigned to each of the central section and side sections. The side back sections are each pivotally mounted on the central back section from their boundary position or load-securing position, either rearward or forwardward, about a pivot axis extending in the vertical direction.

[0012] Because the side back panels can be pivoted around a vertical axis, the side panels can be folded from a lying position upwards to an upright position without any axial displacement of at least one of them. The width of the transport device is adjustable, allowing for convenient parking of a bicycle equipped with the device on bicycle racks, in bicycle garages, etc. The transport device can be made narrower. This also enables it to be taken on public transport or transported on a bicycle carrier for cars and motorhomes. Even in the folded position, goods can still be transported, meaning the transport device has a size-adjustable base or transport surface that can be transformed from a maximum transport area (lying side panels) to a minimum transport area (standing side panels) and vice versa.In the upright position, the side panels simultaneously act as the outer boundaries of the transport area. Additionally, the central back panel creates an outer boundary towards the rider. Because the side panels each have their own corresponding back panels, the transport device has a back panel that extends across its entire maximum transport area. This prevents transported goods from sliding against and damaging the head tube, steering cables, gear cables, wires, and / or brake cables.

[0013] The side rear sections can form a positive connection with the side sections in their limited position on the floor side. This relieves the load on the floor-side pivot joints when the side sections are in the lying position, as the positive connection can at least partially absorb the load acting on the transport surface during loading. The positive connection is thus preferably load-bearing. The positive connection can be designed such that it is automatically released when the side rear sections pivot backward around their vertical axis into their folded-away release position, and automatically re-established when they pivot back forward into their limited position. The load on the pivot joints can be further reduced if pivot stops are arranged on the central section to support the side sections in the lying position. Furthermore, the pivot stops can be used to define the downward pivot range of the side sections.

[0014] To laterally delimit the transport area, a side railing can be provided on each side. In one embodiment, this railing is pivotally mounted on the side back panels. In an alternative embodiment, the railings are pivotally mounted on the side panels. Because the railings are pivotally mounted, the transport area can be opened laterally. Additionally, shelves can be provided on the side panels to hold the railings in their release position, preventing them from accidentally swinging down when locking or securing them to the side panels.

[0015] In one embodiment, locking pins are provided that are mounted in the railing and, in the railing's limited position, engage with the side back panels in a releasable manner. In their released position, the locking pins engage with the side panels in a releasable manner. The locking mechanism in the limited position prevents the side back panels from accidentally pivoting backward out of their limited position. Since the positive fit between the side back panels and the side panels is preferably load-bearing, the respective locking / safety mechanism can be free of a load-bearing function, which simplifies the locking process and reduces stress on the locking elements. By locking the railings in the released position, the locking pins secure them to the side panels, ensuring that the railings are secured to the side panels when they are folded up or down.Storing the locking pins within the respective railing prevents them from being lost.

[0016] To secure the side back panels in their restricted position even when the railings are in their released position, the locking pins can be engaged with a positive-locking section of the back panels. This prevents the side back panels from accidentally pivoting backward from their restricted position into their released position when the railing is open. Simultaneously, the side panels and the swung-away railing are fixed in position. In other words, the positive locking mechanism via the respective locking pin secures each back panel and side panel, including the railing, relative to each other. Each side back panel is positively engaged with its respective side panel, allowing the side panel to bear weight while the locking pin is free of any load-bearing function.The locking pins are secured in the side panels during assembly and simultaneously fix the side back panels in their limit position. Since the positive fit of the side back panels to the side panels is preferably load-bearing, the respective locking / securement can be free of a load-bearing function, which simplifies the locking process and reduces stress on the locking elements. In one embodiment, the locking pins have a rotationally symmetrical projection for this purpose.

[0017] The railings can each have at least one sliding mechanism, such as a slot. This allows the railings to be moved relative to the side panels or back panels.

[0018] Each railing's pivot axis can be guided through the elongated holes, allowing the railing to be moved from its locked position to its unlocked position and vice versa. The locking pins can then each be mounted in a bore that allows the locking pin to move along its longitudinal axis. This secures the locking pins with a shaft section in corresponding through-holes in the railings, simplifying the locking and unlocking process. In an alternative embodiment, the locking pins are mounted within the elongated holes.

[0019] A front bar can be provided to limit the front of the transport area. This bar extends laterally across the transport device and can be folded down. This action moves the front bar into a release position, opening the front of the transport area.

[0020] The front bar can be releasably locked in its limited position to prevent accidental folding down. The front bar can, for example, have at least one leg with a sliding track, such as an elongated slot extending transversely, in which a transverse pivot axis is guided. The pivot axis is located in the central section to allow the side panels to be folded in and to maintain a front boundary of the transport area even when the side panels are folded (folded up). The elongated slot allows the front bar to be raised and lowered. For this purpose, a corresponding recess can be provided in the central section, extending from the at least one leg. The locking mechanism is achieved by the at least one leg being inserted into the recess.The elongated hole preferably has a length such that when one end of the elongated hole is positioned on the axis of rotation, the front bar can pivot, and when the opposite end of the elongated hole is positioned on the axis of rotation, the front bar is locked in its limited position. If the bar has only one leg, it is T-shaped. Preferably, the front bar is U-shaped with two legs.

[0021] A bicycle according to the invention has a transport device according to the invention.

[0022] This measure allows the bicycle to transport loads of varying sizes and to be stored in a space-saving manner.

[0023] Advantageous embodiments of the invention are the subject of further dependent claims.

[0024] To simplify handling, and in particular to prevent bending stresses from being introduced into the railings when changing position from the limit position to the release position and vice versa, the railings can have a recess on their inner sides to accommodate the locking pins and projections. This allows the railings to be moved from one position to the other with a simple sliding-pivoting motion.

[0025] Alternatively, the side panels can have a longitudinal recess open on one side to accommodate the projection. These longitudinal recesses can facilitate insertion and reduce the thickness of the railings. For example, the railings can have a recess on their inner sides to receive the locking pins and the projection. Another option involves the railings having a recess on their inner sides to receive the locking pins, and the side panels having a longitudinal recess open on one side to accommodate the projection.

[0026] The swivel joints can be further relieved if swivel stops are arranged on the central part to support the side parts in a lying position.

[0027] For transporting small items such as bags or handbags, it is advantageous if the transport area has a relatively tight mesh in its rear section (near the back), so that these small items cannot fall through the back section. In the front section of the base, further away from the back, it is conceivable that the transport area has a larger mesh size.

[0028] Alternative or equivalent terms for "lying position" include, for example, "lying transport position," "folded-down transport position," "horizontal transport position," "flat position," "transport device in the unfolded state," and "transport device in the open state." Alternative or equivalent terms for "tilted position" include, for example, "standing position," "folded-up position," "vertical position," "upright position," "transport device in the folded-up state," and "transport device in the closed state."

[0029] The figures illustrate preferred embodiments of the invention with the aid of highly simplified schematic representations. Fig. Figures 1 to 6 are perspective views of a first embodiment of the transport device according to the invention in different transport positions. Fig. Figures 7 to 11 are perspective views of a second embodiment of the transport device according to the invention in different transport positions. Fig. 12 to 14 perspective views of a third embodiment of the transport device according to the invention in different transport positions, Fig. 15 a stabilizing strut exemplified on the left lateral back part of the second embodiment, Fig. 16 a single illustration of an exemplary locking pin, Fig. 17 a single illustration of a locking pin passage in the railing according to the first and second embodiments, Fig. 18 the locking pin passage with the locking pin in the limit position of the railing according to the first and second embodiments, Fig. 19 the locking pin guide with the locking pin in the release position of the railing according to the first and second embodiments, Fig. 20 a representation of an upper pin receptacle and a locking pin passage in the railing according to the third embodiment, Fig. 21 a representation of a lower pin receptacle in conjunction with the locking pin passage according to the third embodiment, Fig. 22 a single cross-sectional view of a front pin receptacle, Fig. 23 a single view of the front pin receptacle in longitudinal section from the front, Fig. 24 a single view of the front pin receptacle in longitudinal section from the rear, Fig. 25 a single representation of an insertion slot of the front pin receptacle in top view from the outside, Fig. 26 A detailed representation of an embodiment of a front pin receptacle in section with railing and locking pin in the release state, in which the railing can be pivoted, Fig. 27 a detailed view of the front pin receptacle in section with railing and locking pin in the locked state, Fig. 28 a detailed view of the front pin receptacle in section with railing and locking pin in the locked and secured state, Fig. 29 a representation of a rear pin receptacle, a positive locking element of the back parts and the locking pin shown separately, Fig. 30 a representation of a rear positive locking mechanism (left back part) with upright railing and locking pin in the release, and Fig. 31 a representation of the rear positive locking mechanism with upright railing and locking pin in the locked position, Fig. 32 a representation of the rear positive locking mechanism with hanging railing and locking pin in the secured position, Fig. 33 a detailed representation of an alternative form-fitting element of the back parts, Fig. 34 a front bar in its limiting position, Fig. 35 the front bar in its release position, Fig. 36 a detailed representation of the front bar in its limited position, Fig. 37 a detailed representation of the front bar in its released position, and Fig. Figures 38 to 44 show individual views of the third embodiment in an intermediate position.

[0030] Specifications such as "front and rear", "sideways and width", as well as "top, bottom, height and flat" refer to a longitudinal direction x (front and rear), a transverse direction y ("sideways and width") and a vertical direction z (top, bottom, height and flat) of a bicycle receiving the transport device on the head tube.

[0031] The coordinate system shown in each figure refers to the transport device (x longitudinal direction, y transverse direction, and z vertical direction). When mounted on a bicycle, the longitudinal direction x, the transverse direction y, and the vertical direction z correspond (essentially) to the three directions x, y, and z of the bicycle.

[0032] For the sake of clarity, functionally equivalent elements in the figures are occasionally given a reference number, or in the case of several equivalent elements, only one element is numbered.

[0033] In the Fig. Figures 1 to 6 schematically show a first embodiment of the transport device 1 according to the invention in different transport positions and views. The transport device 1 is, for example, a front luggage carrier (front carrier) of a bicycle (front carrier), which is attached to the head tube or steering tube of a bicycle, scooter, e-scooter, and the like for transporting goods. Of course, the transport device 1 can also function as a rear carrier, in which case it is preferably arranged with its back facing forward in the direction of travel.

[0034] The transport device 1 has a central section 2 and two side sections 4, 6, which are pivotally attached to opposite longitudinal sides of the central section 2 by means of base joints 8, 10 about pivot axes x1, x2 extending in the longitudinal direction x. Attachment to the bicycle's head tube is achieved via retaining tabs 12 and the like, guided by screws, which establish a fixed but detachable mechanical connection between the central section 2 and the head tube. The central section 2 is rigidly mounted to the head tube.

[0035] The central section 2 and the side sections 4, 6 form a transport surface for receiving goods. Thanks to the base hinges 8, 10, the side sections 4, 6 can be individually pivoted from their horizontal position to an upright position, thereby reducing the transport surface accordingly. To relieve stress on the base hinges 8, 10 and to create a defined horizontal position for the side sections 4, 6, pivot stops 14 can be provided below the base hinges 8, 10 on the central section 2 (see, for example, [reference]). Fig. 14).

[0036] The central section 2 and the side sections 4, 6 are each assigned a back section 16, 18, 20 of the transport device's back. The back serves as a rear support for the goods to prevent them from falling backward and from colliding with the control tube, control cables, Bowden cables, cables, and the like. The side back sections 18, 20 are each pivotally mounted on the central back section 16 by means of back joints 22, 24 about a pivot axis z1, z2 extending in the vertical direction z. The side back sections 18, 20 can thus be moved from their limit position ( Fig. 1 to 4) backwards into their release position ( Fig. 5 and Fig. 6) be pivoted. To relieve the bottom joints 8, 10 of the side panels 4, 6, the lateral back panels 18, 20 are engaged with the side panels 4, 6 in their limit position via a positive locking mechanism (FS) located away from the bottom joints 8, 10 and the back joints 22, 24. The positive locking mechanism is automatically released when the lateral back panels 18, 20 are pivoted into their release position and automatically re-established when they are pivoted back into their limit position. The positive locking mechanism (FS) is load-bearing, so that the side panels are also held at their rear outer end in the horizontal position. A detailed explanation of the positive locking mechanism (FS) follows in the Fig. 29 to 33.

[0037] Side railings 26, 28 are provided to define the lateral boundaries of the transport area. These railings have an elongated, strut-like shape. In addition to providing lateral boundaries, the railings 26, 28 also serve to support the side panels 4, 6 in their horizontal position. In this embodiment, the upper end 30 of each railing 26, 28 is pivotally connected to the side back panels 18, 20 by means of a railing joint 33 about a pivot axis y1, y2 extending in the transverse direction y. A slot 34 is provided in the lower end 32 of the railing, in which a locking pin 36 is guided. This locking pin can be releasably engaged with a front pin receptacle 38 and a rear pin receptacle 40 of the side panels 4, 6.The elongated holes 34 each allow the railings 26, 28 to be shifted, so that a difference in length from the axis of rotation y1, y2 of the railings 26, 28 to the respective front pin receptacle 38 and to the respective rear pin receptacle 40 can be compensated for. Each elongated hole 34 has a minimum length corresponding to the difference in length.

[0038] The railings 26, 28 can be moved around the axis of rotation y1, y2 from their limiting position to a release position in which the transport area is laterally free of any lateral limitation ( Fig. 3 and Fig. 4) To limit the swivel angle, a guardrail stop 42 can be attached to each of the side back sections 18, 20 on the rear side of the rotation axes y1, y2. In the release position, the locking pin 36 engages in the rear pin receptacle 40 and additionally secures the respective side back sections 18, 20 against accidental swiveling backward into its release position.

[0039] A front bar 44 is provided to define the front boundary of the transport area. This bar extends in the transverse direction y of the transport device 1 and can be folded forward from its limiting position about a pivot axis y3. The pivot axis is located in the central section to allow the side sections 4, 6 to be folded in and to provide a front boundary for the transport area even when the side sections 4, 6 are folded in (folded up).

[0040] The front bar 44 is releasably locked in its upright position to prevent accidental folding down into its horizontal release position. A detailed explanation of the positive locking mechanism FS follows. Fig. 34 to 37.

[0041] In the Fig. Figures 7 to 11 schematically show a second embodiment of a transport device 1 according to the invention in different transport positions and views. In contrast to the first embodiment according to the Fig. In each of the following embodiments, a slot 34 is formed in the upper end 30 of the railing (1 to 6). The railing hinges 33 are arranged unchanged in the upper end 30 of the railing, so that the axes of rotation y1, y2 are guided through the respective slot 34. The locking pin 36 is mounted in a bore in the lower end 32 of the railing. Other functionalities correspond to the first embodiment.

[0042] In the Fig. Figures 12 to 14 show a third embodiment of a transport device 1 according to the invention in different transport positions and views.

[0043] The main difference from the first embodiment according to the Fig. 1 to 6 and to the second embodiment according to the Fig. 7 to 11, the railings 26, 28 are hinged at their lower end 32 to the side pieces 4, 6 via the pivot axis y1, y2. The pivot axis y1, y2 is guided in the elongated holes 34. The respective locking pin 36 is mounted in a bore in the respective upper railing end 30 and is thus engaged with the side back pieces 18, 20 when the railings 26, 28 are in the limit position. When the railings 26, 28 are in the release position, their locking pin 36 releasably engages with the side pieces 4, 6 and secures the side back pieces 26, 28 in their limit position (in Fig. 13 (indicated by left side panel 6). For this purpose, the side back panels 18, 20 each have an upper pin receptacle 38 and a lower pin receptacle 40, which are designed according to the front and rear pin receptacles. The railings 26, 28 then lie laterally against these and are flush with them. Additionally, shelves 43 for the railings 26, 28 in their release position can be provided on the side panels 4, 6 to prevent accidental downward swinging when locking or securing them to the side panels 4, 6.

[0044] If, as in Fig. As illustrated in Figure 14, when the side back sections 18, 20 are in their release position, the railings 26, 28 also lie laterally and flush against or on the side sections 4, 6 and are held in this position by the locking pins 36. To stabilize the side back sections 18, 20 in their release position, two back joints 22, 24 arranged one above the other in the vertical direction y are provided for each side back section 18, 20.

[0045] As in Fig. As indicated in Figure 15, in the first and second embodiments, the side back sections 18, 20 can of course also be pivotably mounted on the central back section 16 via several back joints 22, 24. For this purpose, for example, as in the third embodiment according to the Fig. 12 to 14 each have an additional strut 45 on the side back parts 18, 20.

[0046] The side panels 4 and 6 can each be swivelled upwards or backwards by at least 90°. The side back panels 18 and 20 can each be swivelled backwards or forwards by at least 90°.

[0047] The angle between the backrest and the transport surface depends on the head tube angle and the angle of the transport surface to the horizontal. A backward slope is preferred; for example, the backrest-transport surface angle lies in a range between 95° and 120°.

[0048] The locking pin 36, the front pin receptacle 38, the rear pin receptacle 40 and the positive locking FS of the side back parts 18, 20 with the side parts 4, 6 in the limiting position of the side back parts 18, 20 are explained in more detail below by means of schematic illustrations.

[0049] As in Fig. As shown in Figure 16, the locking pin 36 has an actuating section 46 for actuation, a cylindrical shaft 48 for guidance in the railing 26, 28 in the direction of rotation and longitudinal direction of the pin, for example two opposing locking bars 50, 52, and a head section 54 in the form of a cylindrical projection opposite the locking bars 50, 52 with a conical taper in the insertion direction. The locking pin 36 can interact with spring elements (not shown) or include further locking systems. The actuating section 46 has a rectangular profile here; however, as shown in the third embodiment, it can also be designed as a round knob.

[0050] As in Fig. As shown in Figure 17, the railings 26, 28 can each have an internal recess 56 to accommodate the bars 50, 52 and the projection 54, in order to prevent the introduction of bending stresses into the railings 26, 28 when changing position from the limit position to the release position and vice versa. A through-hole 57 is provided in the center of the recess to guide the pin shaft 48.

[0051] In the first and second embodiments, the recess 56 is butterfly-shaped, so that the actuating section 46 can be operated in the same way regardless of its operative connection with the front pin receptacle 38 or the rear pin receptacle 40. Fig. Figure 18 shows the locking pin 36 in its release position relative to the front pin receptacle 38. Fig. Figure 19 shows the locking pin 36 in its release position relative to the rear pin receptacle 40. Locking via the bolts 50, 52 is achieved by rotating the locking pin 36 90° clockwise from a vertical position of the actuating section 46. The actuating section 46 is then in a horizontal orientation. Unlocking is achieved by rotating the locking pin 36 in the opposite direction. These orientations apply to interaction with both the front pin receptacle 38 and the rear pin receptacle 40.To enable this uniform orientation of the actuation section 46 regardless of whether the railings 26, 28 are in their limit position or their release position, the butterfly-shaped recess 56 (receiver) is formed in the railings 26, 28, which allows the bars 50, 52 in the railings 26, 28 to pivot by the same pivot angle as the railings 26, 28 and defines a respective starting position for the bars 50, 52.

[0052] In the third embodiment, the recess 56 is designed in the form of a rectangular groove for receiving the bolts 50, 52. To receive the pin projection 54 during a change of position, a longitudinal recess 58 open on one side is provided in the area of ​​the upper pin receptacle 38 and the lower pin receptacle 40, respectively. Fig. 20 and Fig. 21).

[0053] In the Fig. Figures 22 to 23 show an exemplary front pin receptacle 38 in several views and sections. The front pin receptacle 38 has a slot 60 for inserting the locking bars 50, 52, which is widened centrally to allow passage of the pin shaft 48. The slot 60 opens into a cavity with two arc-shaped, diametrically opposed areas 62, 64 for receiving the locking bars 50, 52. In the insertion direction behind the cavity, a central recess 66 is provided for receiving the pin projection 54.

[0054] The operating principle is as follows: Initially, the locking pin 36 is in its in Fig. 26 shown in the reset position. To lock, the locking pin 36 is then inserted through the slot 60 into the front pin receptacle 38 ( Fig. 27). By rotating the locking pin 36 after insertion, the bolts 50, 52 are turned into the cavity areas 62, 64 and thus positioned transversely to the slot 60 ( Fig. 28), thereby securing the locking pin 36 in the front pin receptacle 38 and thus achieving mutual positional fixation of the components lateral back parts 18, 20, side parts 4, 6 and railings 26, 28.

[0055] The upper pin receptacle 38 of the third embodiment is designed according to the front pin receptacle 38, except for one essential difference. The difference lies in the outer longitudinal recess 58, which is open on one side, for the sliding reception of the pin projection 54 when the operative engagement is established (see Fig. 20).

[0056] In the Fig. Figures 29 to 32 show an exemplary rear pin receptacle 40 in several model views and sections.

[0057] The rear or lower pin receptacle 40 is designed in accordance with the front pin receptacle 38 or upper pin receptacle 40. It has a slot 60 for inserting the locking pin 36 and a cavity with two diametrically opposed arcuate sections 62, 64 for receiving the bolts 50, 52. In contrast to the front or upper pin receptacle 38, a central recess 66 opens into a receiving chamber 78 for a positive locking element 80 of the lateral back parts 18, 20 in the side parts 4, 6. The positive locking element 80 and the receiving chamber 78 form the positive locking mechanism FS.

[0058] The receiving chamber 78 is L-shaped, corresponding to the positive locking element, with a short leg 82 extending inwards. The receiving chamber 78 is open to the rear, allowing the positive locking element 80 to pivot into position so that, in the limit position of the lateral back sections 18, 20, a positive locking connection can be established between the lateral back sections 18, 20 and the respective side sections 4, 6. An opening 86 for receiving the pin projection 54, which forms the actual recess 66, is provided in the upright long leg 84 of the positive locking element 80.

[0059] Initially, the locking pin 36 is in its in Fig. 30 shown in the reset position. To lock, the locking pin 36 is then inserted through the slot 60 into the rear or lower pin receptacle 40 ( Fig. 31). The pin projection 54 engages in the opening 86 of the positive locking element 80 and thus secures the respective lateral back section 18, 20 in its limiting position. By rotating the locking pin 46 after insertion, the latches 50, 52 are turned into the cavity areas 62, 64 and thus positioned transversely to the slot 60 ( Fig. 32), thereby securing the locking pin 36 and thus the respective lateral back sections 18, 20 in the rear or lower pin receptacle 40. Since the locking pin 36 is guided in the railing 26, 28, this is also fixed in its release position.

[0060] Since the locking pin 36 is secured in the respective side part 4, 6 and not in the back parts 18, 20, the railings 26, 28 are also detachably fixed to the side parts 4, 6 when the back parts 18, 20 are in their release position.

[0061] As exemplified in Fig. As shown in Figure 33, the positive locking element 80 can also be T-shaped or have another geometry suitable for positive locking.

[0062] With reference to the Fig. The front bar 44 is explained in more detail in sections 34 to 37. The front bar 44 is U-shaped. It has an upper cross member 88, from which a leg 90, 92 extends at each end. The front bar 44 is pivotably mounted in the central section 2 about the axis of rotation y3 extending in the transverse direction y and can thus be moved from an upright limiting position ( Fig. 34) into a horizontal release position ( Fig. 35) are transferred, in which the transport area is open at the front.

[0063] As in the Fig. Numbered 36, in each leg 90, 92 a longitudinal guide 94 extending in the longitudinal direction of the leg is formed in the form of an elongated hole into which a pin 96 is guided to form the axis of rotation y3.

[0064] Below legs 90 and 92, a recess 100 is provided in the central section 2, the inner contour of which corresponds to an outer contour of legs 90 and 92. The depth of the recesses 100 is chosen to correspond to the length of the elongated holes 96.

[0065] In his in the Fig. 34 and Fig. In the illustrated limit position 36, the front bar 44 stands upright and its legs 90, 92 engage in the recesses 100. The front bar 44 is thus releasably locked in place. The front bar 44 is lowered and the pins 96 are now located at the upper ends of the elongated holes 102. To transfer it into its position in the Fig. 35 and Fig. In the release position illustrated in Figure 37, the front bar 44 is raised until its legs 90, 92 are released from their engagement with the recesses 100. The lower ends of their elongated holes 104 running against the pins 96 indicates that the locking mechanism is released. The front bar 44 can then be swung forward. To prevent a step formation on the transport surface in the area of ​​the front bar 44 when the front bar 42 is folded forward, two longitudinal recesses 106 are provided in the central section to accommodate the legs 90, 92 when the front support 42 is folded down. Fig. 36 and Fig. 37).

[0066] For the sake of completeness, the following is included in the Fig. Figures 39 to 44 show the third embodiment of the transport device 1 in an intermediate position with the left railing 28 folded downwards in different perspectives.

[0067] It should be noted that due to a potentially inclined mounting of the transport device on the bicycle or similar, and / or due to the tilting of the back towards the transport surface, the pivot axes x1, x2 and pivot axes z1, z2 may also be inclined to the longitudinal direction x or the vertical direction z. The phrases "a pivot axis x1, x2 extending in the longitudinal axis x" and "pivotable about a pivot axis z1, z2 extending in the vertical direction z" encompass such inclined positions.

[0068] It should also be noted that the phrase "to the rear boundary of the transport area" also covers the situation where the transport device is used as a rear carrier, rotated 180° around its vertical axis z, so that from the bicycle's perspective the back is at the front and the front bar is at the rear. "To the rear boundary" refers to the back.

[0069] Disclosed are a transport device for a bicycle with a central section and two side sections, wherein the side sections can be folded upwards from a lying position into an upright position, preferably into a standing position, wherein a multi-part backrest is provided and lateral backrest sections can be folded away from the side sections to the rear, and a bicycle with such a transport device. Reference symbol list 1 Transport device 2 Middle section 4 side panel 6 Side panel 8 Floor joint 10 Floor joint 12 retaining tab 14 Swivel stop for side panels 16 middle back section 18 side back panel 20 side back panel 22 Back joint 24 Back joint 26 railings 28 railings 30 upper end of railing 32 lower railing end 33 Railing joint 34 elongated holes in railings 36 Locking pin 38 first or front pin holder or upper pin holder 40 second or rear pin holder or lower pin holder 42 railing stop 43 Storage for railings 44 Front bars 45 strut 46 Actuation section 48 shaft 50 bars 52 bars 54 lead 56 Recess in the railing 57 Through hole 58 Longitudinal recess 60 slots of the first pin holder 62 Area of ​​the cavity of the first pin socket 64 Area of ​​the cavity of the first pin socket 66 central depression of the first pin recess 78 Recording room 80 Positive locking element 82 Short thighs 84 Long thighs 86 Opening 88 Cross brace 90 leg 92 legs 94 elongated holes in the legs 96 pens 100 In-depth study 102 upper end of elongated hole 104 upper end of elongated hole 106 Longitudinal depression FS Formschluss x Longitudinal direction x1, x2 Swivel axis of the side panels y transverse direction z Upward direction y1, y2 axis of rotation of the railings y3 axis of rotation of the front bar z1, z2 pivot axes of the back parts QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 202021104509U1

[0004] DE 31 14 823 A1

[0005] FR 942 215 A

[0006] WO 2008 / 028 380 A1

[0007] CN 2 936 900 Y

[0007] DE 10 2023 103 476.6

[0008]

Claims

[1] Transport device (1) for a bicycle with • a central part (2) and two side parts (4, 6) to form a transport surface, and with • a multi-part back (16, 18, 20) for the rear boundary of the transport area, where • the side parts (4, 6) are each pivotally mounted on the middle part (2) about a pivot axis (x1, x2) extending in the longitudinal axis (x), • one of the back pieces (16, 18, 20) is assigned to each of the middle section (2) and the side section (4, 6), and • the lateral back sections (18, 20) are each pivotable from their limiting position to the rear or to the front about a pivot axis (z1, z2) extending in the vertical direction (z) on the middle back section (16). [2] Transport device according to claim 2, wherein the lateral rear parts (18, 20) in their limiting position each form a positive locking (FS, 78, 80) with the side parts (4, 6) on the bottom side. [3] Transport device according to claim 1 or 2, wherein railings (26, 28) are pivotably mounted on the lateral back parts (18, 20) and / or the side parts (4, 6) to laterally limit the transport area. [4] Transport device according to claim 3, wherein locking pins (36) are provided which are mounted in the railings (26, 28) and which, in the limit position of the railings (26, 28), can be released to the lateral back parts (18, 20) and, in their release position, can be released to the side parts (4, 6). [5] Transport device according to claim 4, wherein in the limiting position of the lateral back parts (18, 20) the locking pins (36) are in effective engagement with a positive locking element (80) of the lateral back parts (18, 20). [6] Transport device according to one of claims 3, 4 or 5, wherein the railings (26, 28) each have at least one elongated hole (34) to enable their displacement between their limit position and their release position. [7] Transport device according to claim 6, wherein a pivot axis (y1, y2) of the respective railing (26, 28) is guided through the elongated holes (34) on the lateral back parts (18, 20). [8] Transport device according to one of the preceding claims, wherein a front bar (44) extending in the transverse direction (y) can be folded in to form the front boundary of the transport area. [9] Transport device according to claim 8, wherein the front bar (44) is releasably locked in its limiting position. [10] Bicycle with a transport device (1) according to one of the preceding claims.

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