HUE034681T2

HUE034681T2 - Vonórúd és azt tartalmazó targonca

Info

Publication number: HUE034681T2
Application number: HUE14194220A
Authority: HU
Inventors: Jack Groenholm
Original assignee: Hartwall K Oy Ab
Priority date: 2014-11-21
Filing date: 2014-11-21
Publication date: 2018-02-28
Also published as: KR20170075789A; PL3023316T3; US20170349013A1; ES2643060T3; MX362261B; US10118450B2; CN107000773A; BR112017010623B1; BR112017010623A2; WO2016079377A1; KR101919117B1; EP3023316B1; JP6355847B2; CN107000773B; MX2017006496A; EP3023316A1; JP2017538617A

Description

(12) EUROPEAN PATENT SPECIFICATION (45) Date of publication and mention (51) Int Cl.: of the grant of the patent: B62B 5100 <2006 01> 19.07.2017 Bulletin 2017/29 (21) Application number: 14194220.1 (22) Date of filing: 21.11.2014 (54) Tow bar assembly and dolly comprising the same

Schleppstangenanordnung und Rollwagen damit

Chariot et ensemble de barre de remorquage comprenant celui-ci (84) Designated Contracting States: (72) Inventor: Gronholm, Jack AL AT BE BG CH CY CZ DE DK EE ES FI FR GB 01150 Soderkulla (FI)

GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (74) Representative: Seppo Laine Oy

Itamerenkatu 3 B (43) Date of publication of application: 00180 Helsinki (FI) 25.05.2016 Bulletin 2016/21 (56) References cited: (73) Proprietor: K. Hartwall Oy AB EP-A1- 2 778 015 WO-A1-2012/072856 01150 Soderkulla (FI) FR-A1-2 876 957 FR-A1-2 966 120

Description

FIELD OF THE INVENTION

[0001] The present invention relates to transporting goods. In particular, the invention relates to dollies, on which parceled goods are transported and stored temporarily. To be precise, the invention relates to a tow bar assembly according to the preamble portion of claim 1 and to a dolly comprising the same.

BACKGROUND ART

[0002] There is known a vast variety of different devices used for transporting parceled goods. Typically pieces or stacks thereof are loaded onto a wheeled platform, on which they are conveyed to shop floor or storage. These wheeled platforms are called dollies. Some dollies are equipped with a tow bar for transporting a plurality of dollies in a chained fashion. When the tow bar for pulling the dolly is temporarily not used, it is typically pivoted in an upright position for saving space. US 4856810 proposes one solution to providing a space saving tow bar for a dolly. The tow bar known from US 4856810 must be manually manipulated into the vertical space saving position.

[0003] A solution for biasing the tow bar to the vertical position is proposed by EP 277 8015, which discloses a biasing mechanism, which connects the tow bar to the dolly. The biasing mechanism includes an axle fixed to the dolly and a spring arranged around the axle and tensioned between the tow bar and the chassis of the dolly. The spring biases the tow bar to rotate it about the fixed axle towards an upright position. The biasing mechanism known from EP 277 8015 has the additional benefit of assisting coupling between the tow bar and the receiving socket of another dolly.

[0004] The tow bars known from US 4856810 and EP 277 8015 are both permanently fixed to the dolly. Detachable tow bars are also known for retrofitting a tow bar to a dolly. Such tow bars typically feature a quick coupling between a plug on the tow bar and a corresponding socket, which is to be fixed to the dolly for receiving the tow bar. While detachable tow bars improve modularity of dollies, they lack the benefit of saving space by biasing the tow bar to an upright position.

[0005] It is therefore an aim of the present invention to provide a tow bar assembly, which may be retrofitted to a dolly while maintaining convenient space saving properties of permanently fitted tow bars. Document FR2876957 discloses the preamble of claim 1.

SUMMARY

[0006] The aim of the present invention is achieved with aid of a novel tow bar assembly including a tow bar, a shaft and a biasing member, such as aspring, for biasing the tow bar towards an upright orientation about an axis of revolution. The shaft has a first end and a second end, which opposes the first end. The shaft connects the tow bar to the dolly from the opposing ends so as to provide rotation of the tow bar in respect to the dolly about the axis of revolution. The shaft features an inner cavity, which extends along the axis of revolution. The biasing member is arranged into the cavity of the shaft and rotationally secured thereto. The shaft also features a first end plug at the first end of the shaft for enclosing the biasing member to the cavity. The first end plug rotationally locks the biasing member to the dolly.

[0007] More specifically, the tow bar assembly according to the present invention is characterized by the characterizing portion of claim 1.

[0008] The aim of the present invention is on the other hand achieved with aid of a dolly including such a novel tow bar assembly.

[0009] Considerable benefits are gained with aid of the present invention. The proposed tow bar assembly may be conveniently retrofitted to a dolly thus significantly improving modularity. Because the assembly contains a biasing mechanism, the tow bar will spring to an upright position automatically thus saving space when detached from another dolly without manual user interference. The spring action of the biasing mechanism also aids the coupling of the hitch of the tow bar to the socket of another dolly.

BRIEF DESCRIPTION OF DRAWINGS

[0010] In the following, exemplary embodiments of the invention are described in greater detail with reference to the accompanying drawings in which:

Fig. 1 presents an isometric top view of a dolly with a tow bar assembly according to one embodiment, wherein the castor mount plates have been omitted for illustrative purposes,

Fig. 2 presents a detailed view of the highlighted section of the tow bar assembly of Fig. 1,

Fig. 3 presents a type E view of Fig. 2 showing the hidden outlines of internal components of the tow bar assembly,

Fig. 4 presents a detailed bottom view of the highlighted section of the tow bar assembly of Fig. 1,

Fig. 5 presents a detailed explosion view of the tow bar dolly and tow bar assembly of Fig. 1,

Fig. 6 presents a detailed view of the second end of the shaft, i.e. the proximal end, of the tow bar assembly of Fig. 5, and

Fig. 7 presents a detailed view of the first end of the shaft, i.e. the distal end, of the tow bar assembly of Fig. 5. DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

[0011] As shown in Fig. 1, the tow bar assembly 120 may be retrofitted to a dolly 100 having a typical construction including a chassis 110 with two mutually parallel longitudinal peripheral beams 111 and two mutually parallel transversal peripheral beams 112 connected by the longitudinal peripheral beams 111 to form a rectangular frame. Castors 130 are connected to the underside of the rectangular chassis 110 through mount plates, which have been omitted from the drawings for showing details of connecting the tow bar 120 to the dolly 100. The castors 130 include swivel castors arranged to the front end of the dolly 100, which features the tow bar assembly 120, and fixed castors arranged to the rear end of the dolly 100, which features a female counterpart of a hitch (not shown) for receiving a male counterpart of a hitch of a tow bar of another dolly (not shown). The longitudinal peripheral beams 111 extend in the main travelling direction of the dolly 100, i.e. in the direction steered to by the fixed castors. Accordingly, the transversal peripheral beams 112 extend in a direction perpendicular to the longitudinal peripheral beams 111 and therefore to the main travelling direction. The chassis 110 also includes at least two mutually parallel longitudinal cross beams 113, which are distanced from each other in the transversal direction. The longitudinal cross beams 113 extend parallel to the longitudinal peripheral beams 111 and connect the transversal peripheral beams 112 within the rectangular frame of the chassis 110.

[0012] Turning now to Figs. 2 to 4, which show the relationship between the tow bar assembly 120 and the chassis 110 of the dolly 100. The longitudinal cross beams 113 contain pivot points for providing an axis of revolution R for the tow bar assembly 120 (Fig. 2). The tow bar assembly 120 contains a tow bar 121 and a shaft 122, which is fixed thereto. The shaft 122 spans between the longitudinal cross beams 113 within the periphery of the frame of the chassis 110, whereby the shaft 122 is protected by the frontal transversal peripheral beam 112 (Fig. 4). More specifically, the shaft 122 has a first end 122Aand a second end 122B, which opposes the first end 122A, whereby the shaft 122 is connected to the longitudinal cross beams 113 from the ends 122A, 122B. The axis of revolution R is therefore formed between and through the first and second end 122A, 122B of the shaft 122 (Fig. 2).

[0013] Figs. 1 and 3 show how the tow bar 121 includes two sections, where the terminal end of a first section features a male counterpart of a hitch and where a second section extends from the first section in an angled manner. The shaft 122 is fixed to said second section of the tow bar 121. The shaft 122 is used to house the biasing mechanism of the tow bar assembly. The components housed inside the shaft 122 are illustrated by dotted lines in Fig. 3 and by solid lines in the explosion view of Fig. 5. To facilitate the housing of the biasing mechanism the shaft 122 includes an inner cavity, which extends along the axis of revolution R. Firstly, the biasing mechanism includes a biasing member 123, which is provided to the inner cavity of the shaft 122. In the embodiment shown in the Figs, the biasing member 123 is a spring, more specifically a coil spring.

[0014] The biasing mechanism also includes two end plugs 124, 125 for closing the ends 122A, 122B of the shaft 122 and for enclosing the biasing member 123 to the inner cavity of the shaft 122. A first end plug 124 is connected to the first end 122A of the shaft 122 through a sliding fit, whereby rotation between the first end plug 124 and shaft 122 is allowed. The first end plug 124 has three functions: 1. to enclose the biasing member 123 to the inner cavity of the shaft 122, 2. to enable pre-tensioning of the biasing member 123 and to 3. to rotationally lock the biasing member 123 to the dolly 100 in the fully assembled state.

[0015] The features of the first end plug 124 enabling the three functions are discussed in greater detail hereafter.

[0016] The second end plug 125 is fixed to the second end 122B of the shaft 122 for enclosing the biasing member 123 to the cavity. The end plugs 124, 125 are connected by the biasing member 123. The first end 122A of the shaft 122 is rotatable in respect to the dolly 100 by means of the sliding fit between the shaft 122 and the first end plug 124, which in turn is angularly locked to the dolly 100. On the other hand the second end 122B of the shaft 122 may be rotated in respect to the dolly 100 by means of the sliding fit between the dolly 100 and second end plug 125, which in turn is fixed to the shaft 122. To facilitate this function the second end plug 125 rotationally locks the biasing member 123 to the shaft 122. The features of the second end plug 125 enabling the three functions are discussed in greater detail hereafter. It is to be, however, understood that the angular displacement between the first end plug 124, which is angularly fixed to the dolly 100 but rotatable connected to the shaft 122, and second end plug 125, which is rotatably connected to the dolly 100 but angularly fixed to the shaft 122, causes the biasing member 123 there between to undergo winding. Accordingly, the biasing member 123 preferably contains spring properties to resist winding and more preferably also compression. Such spring properties may be achieved by means of a coil spring.

[0017] Turning now to Figs. 5 to 7, which show the details of the end plugs 124, 125 of the shaft 122 and the interface between tow bar assembly 120 and the dolly 100. As can be seen from Fig. 5, the longitudinal cross beams 113 feature pivot points 113a, 113b for receiving the end plugs 124, 125, respectively. The axis of revolution R passes through the pivot points 113a, 113b which are aligned accordingly. For providing a rotational lock between the first end 122Aof the shaft 122 and the dolly 100, the first pivot point 113a is formed as a rotationally non-symmetrical opening 113a. It is to be understood that all references to rotationally symmetrical or non- symmetrical shapes are viewed as rotation about the axis of revolution R, i.e. as rotation about the longitudinal direction of the shaft 122. The rotationally non-symmetrical opening 113a is dimensioned to receive the first end plug 124 in two stages, which are discussed in greater detail hereafter. The second pivot point 113b in the opposing longitudinal cross beam 113 is formed as a rotationally symmetrical opening for receiving the second end plug 125 in a rotatable manner.

[0018] In Fig. 5, the biasing member 123 is retracted from the inner cavity of the shaft 122 for showing that according to the illustrated embodiment, the biasing member 123 provided in the form of a coil spring terminates at both ends to a straight portion for coupling to the end plugs 124,125. In other words, according to a particular embodiment, the biasing member 123 is a coil spring, which includes a first coupling portion 123a. The first coupling portion 123a may take the shape of a straight terminal. The other end of the coil spring terminates to a second coupling portion 124c, which is similar to the first coupling portion 123a, wherein the first and second coupling portions 123a, 123c are joined by a spiral section 123b. In other words, according to one embodiment the biasing member 123 is a flat-ended coil spring.

[0019] The connection between the biasing member 123 and the end plugs 124, 125 is provided through cooperating form-locking shapes at the terminal ends of the biasing member and at ends of the end plugs 124, 125 proximal to the biasing member 123. In the illustrated example of Fig. 5, the form locking shape 124d of the first end plug 124 is a groove for receiving the first coupling portion 123a of the biasing member 123. The second end plug has a similar groove (not shown) for receiving the second coupling portion 123c of the biasing member 123.

[0020] As described above, the second end plug 125 at the second end 122B of the shaft 122 is fixed thereto to close the second end 122B of the shaft 122. The end plug 125 may be welded to the shaft 122, for example, to ensure strong hold. To facilitate welding, the second end plug 125 includes a rotationally non-symmetrical engagement portion 125b, such as a racetrack oval shape, for engaging with a wrench or similar tool for maintaining the second end plug 125 in a desired angular position in respect to the shaft 122 during welding. Alternatively, the rotationally non-symmetrical engagement portion 125b may be used to dial in the second end plug 125 provided with a male thread (not shown) to the shaft 122 having a receiving female thread in the inner cavity (not shown).

[0021] The terminal end tip 125a of the second end plug 125 is rotationally symmetrical for providing rotation in respect to the dolly 100, more specifically to the second pivot point 113b of the longitudinal cross beam 113. According to the illustrated example of Fig. 6, the terminal end tip 125a is cylindrical for sturdy rotation in the cylindrical opening of the pivot point 113b.

[0022] Turning now to Fig. 7, which shows the first end plug 124 in greater detail. In essence, the first end plug 124 includes four portions 124a to 124d shaped to provide the three functions mentioned above. Looking at the surface in closest proximity to the biasing member 123 (see Fig. 5), the first end plug 124 includes a form-locking shape 124d, such as a groove, for locking the first end plug 124 angularly to the biasing member 123. The body portion 124c of the first end plug 124 extends from the surface proximal to the biasing member 123 along the axis of revolution R. The body portion 124c is preferably cylindrical and dimensioned to establish sliding fit in respect to the inner cavity of the shaft 122 for providing rotation there between about the axis of revolution R as well as for axial displacement along the axis of revolution R.

[0023] Extending from the cylindrical body portion 124c is a rotationally non-symmetrical shape 124b. The rotationally non-symmetrical shape 124b in the embodiment illustrated in the Figs, takes the shape of a blunt cam. The rotationally non-symmetrical shape 124b may, however, be a different rotationally non-symmetrical shape, such as a quadrangle, triangle, star, oval, etc. According to a preferred embodiment, the rotationally non-symmetrical shape 124b is designed to be engaged with a tool, such as a wrench, for rotating the first end plug 124 in respect to the shaft 122 during installation.

[0024] Extending from the rotationally non-symmetrical shape 124b along the axis of revolution R is a terminal end tip 124a, which has a rotationally symmetrical shape. Similarly to the terminal end tip 125a of the second end plug 125, the terminal end tip 124a of the first end plug 124a is preferably cylindrical for sturdy rotation in the opening of the pivot point 113a.

[0025] The opening of the pivot point 113a as well as the a terminal end tip 124a and rotationally non-symmetrical shape 124b of the first end plug 124 are dimensioned such that the rotationally non-symmetrical opening 113a in the longitudinal cross beam 113 is configured to receive the rotationally symmetrical terminal end tip 124a of the first end plug 124 in a rotatable manner in a retracted axial position of the first end plug 124, and on the other hand to receive the rotationally non-symmetrical shape 124b of the first end plug 124 in a non-rotatable manner in an extended axial position of the first end plug 124. Such a dimensioning principle is due to the intended installation procedure described below.

[0026] The tow bar assembly 120 is intended to be installed to the dolly 100 partially preassembled. The tow bar 121 is preformed to include the mutually angled portions and the hitch at the end of the longer portion. Also, the shaft 122 is attached to the shorter portion of the tow bar 121 and the second end plug 125 is fixed into the inner cavity of the shaft 122 by welding, for example. Dollies which have been designed to receive such a tow bar assembly 120 are ready as is, whereas conventional dollies would be provided with openings 113a, 113b by drilling and machining or filing suitable holes into the longitudinal cross beams 113.

[0027] In the installation procedure, the biasing member 123 is firstly inserted into the inner cavity of the shaft 122 so that the second coupling portion 123c of the biasing member 123 locks into place to the receiving groove (not shown) on the second end plug 125. With the biasing member 123 in place, the first end plug 124 is inserted into the inner cavity of the shaft 122 by simply sliding the first end plug 124 in by virtue of the sliding fit there between. The first end plug 124 is rotated in the inner cavity of the shaft 122 so as to lock the first coupling portion 123a into place to the receiving formlocking shape 124d, i.e. groove, in the first end plug 124.

[0028] With the biasing member 123 enclosed by the shaft 122 and end plugs 124, 125, the biasing member 123 is compressed by pressing the first end plug 124 inward into the inner cavity of the shaft. With the first end plug 124 in the retracted axial position, the tow bar assembly 120 is positioned in respect to the dolly 100 by inserting the terminal tip 125a of the second end plug 125 into the receiving opening 113b in the longitudinal cross beam 113. The terminal tip 124a of the first end plug 124 is thereafter aligned with the rotationally non-symmetrical opening 113a in the opposing longitudinal cross beam 113. The rotationally non-symmetrical opening 113a is dimensioned such that the terminal tip 124a of the first end plug 124 may rotate therein. Expelled by the axial spring-back factor of the biasing member 123, the first end plug 124 is driven outward along the axis of revolution R such that the terminal tip 124a is inserted into the rotationally non-symmetrical opening 113a along the axial length of the terminal tip 124a.

[0029] At that stage, the rotationally non-symmetrical shape 124b of the first end plug 124 has not yet become recessed into the rotationally non-symmetrical opening 113a because it should not be angularly aligned. This matter is preferably taken into consideration in designing the angular position of the second end plug 125 and the coupling portions 123a, 123c of the biasing member.

[0030] Next, the biasing member 123 is pre-tensioned by rotating the first end plug 124 in respect to the shaft 122. Since the rotationally non-symmetrical shape 124b of the first end plug 124 is not embedded into the opening 113a, the rotationally non-symmetrical shape 124b is engaged with a tool, such as a wrench, and rotated. During the rotation of the first end plug 124, the biasing member 123, which is at the other end fixed to the shaft 122 via the second end plug 125, undergoes winding and thus is pre-tensioned. The first end plug 124 is simultaneously aligned with the rotationally non-symmetrical shape of the opening at the pivot point 113a on the longitudinal cross beam 113. When the rotationally non-symmetrical shape 124b of the first end plug 124 is aligned with the rotationally non-symmetrical opening 113a, the first end plug 124 - driven by the axial spring-back factor of the biasing member 123 - is expelled into the extended axial position, where the first end plug 124 locks into the rotationally non-symmetrical opening 113a.

[0031] In the fully assembled state, the tow bar assembly 120 may be removed from the dolly 100 by pressing the first end plug 124 inward axially. The first end plug 124 is accessible from underneath the dolly 100, wherein a thin object, such as a paper clip, may be used to press the terminal tip 124a of the first end plug 124. When the axial spring-back factor of the biasing member 123 is exceeded, the rotationally non-symmetrical shape 124b of the first end plug 124 is retracted from the corresponding opening 113a, where after the tow bar assembly 120 may be dis-assembled in a reverted fashion in respect to assembly.

[0032] Above, only exemplary illustrated embodiments have been described. It is, however, to be understood that the inventive concept may be executed in manners deviating from the above description. For example, the interface between the shaft and the dolly, namely the end plugs, may be inverted such that the longitudinal cross beams have a rotationally symmetrical protrusion and an opposing rotationally non-symmetrical protrusion. The protrusions would be designed to cooperate with respective recessions at the terminal end surfaces of the end plugs of the shaft. Such a tow bar assembly would be installed similarly to the illustrated example with the difference that rotationally non-symmetrical recession in the first end plug of the shaft would lock into place by rotating the end plug for aligning the rotationally non-symmetrical shapes of the end plug and the protrusion of the longitudinal cross beam.

[0033] A skilled person may foresee further deviations from the above description without departing from the invention, which is defined by the appended claims. TABLE 1: LIST OF REFERENCE NUMBERS.

Number Part 100 dolly 110 chassis 111 longitudinal peripheral beam 112 transversal peripheral beam 113 longitudinal cross beam 113a pivot point (non-circular opening) 113b pivot point (circular opening) 114 transversal cross beam 120 tow bar assembly 121 tow bar 122 shaft 122A first end 122B second end 123 biasing member 123a first coupling portion 123b spiral section 123c second coupling portion 124 first end plug 124a terminal end tip 124b rotationally non-symmetrical shape (cam) 124c body portion 124d form-locking shape (groove) 125 second end plug 125a terminal end tip 125b rotationally non-symmetrical engagement portion 130 castor R axis of revolution

Claims 1. A tow bar assembly (120) for a dolly (100), the tow bar assembly (120) comprising: - a tow bar (121), - a shaft (122) having a first end (122A) and a second end (122B) opposing the first end (122A), from which ends (122A, 122B) the shaft (122) is configured to connect the tow bar (121) to the dolly (100) so as to provide rotation of the tow bar (121) in respect to the dolly (100) about an axis of revolution (R), and - a biasing member (123), such as a spring, configured to bias the tow bar (121) towards an upright orientation about the axis of revolution (R), - the shaft (122) comprises an inner cavity extending along the axis of revolution (R), characterized in that: - the biasing member (123) is arranged into the cavity of the shaft (122) and rotationally secured thereto, and in that - the shaft (122) comprises a first end plug (124) at the first end (122A) of the shaft (122) for enclosing the biasing member (123) to the cavity, which first end plug (124) is configured to rotationally lock the biasing member (123) to the dolly (100). 2. The tow bar assembly (120) according to claim 1, wherein the shaft (122) is fixed to the tow bar (121). 3. The tow bar assembly (120) according to claim 1 or 2, wherein the first end plug (124) comprises a form locking shape (124d), such as a groove, for engaging to the biasing member (123). 4. The tow bar assembly (120) according to any of the preceding claims, wherein the end of the first end plug (124) distal to the biasing member (123) comprises a rotationally symmetrical shape (124a), such as a cylindrical shape. 5. The tow bar assembly (120) according to any of the preceding claims, wherein the first end plug (124) comprises a rotationally non-symmetrical shape (124b), such as a cam, for engaging to the dolly (110). 6. The tow bar assembly (120) according to claim 5, wherein the rotationally non-symmetrical shape (124b) for engaging to the dolly (100) is shaped to be engaged with a tool, such as a wrench. 7. The tow bar assembly (120) according to claim 1 or 2, wherein the first end plug (124) comprises: - a form locking shape (124d) for engaging to the biasing member (123) formed to the surface proximal to the biasing member (123), - a rotationally symmetrical body portion (124c) extending from the surface proximal to the biasing member (123) along the axis of revolution (R), - a rotationally non-symmetrical shape (124b) extending from the body portion (124c) along the axis of revolution (R) and - a rotationally symmetrical shape (124a) extending from the rotationally non-symmetrical shape (124b). 8. The tow bar assembly (120) according to any of the preceding claims, wherein the first end (122A) of the shaft (122) is configured to be rotationally locked in respect to the dolly (100), whereas the second end (122B) of the shaft (122) is configured to be rotated in respect to the dolly (100). 9. The tow bar assembly (120) according to any of the preceding claims, wherein the first end plug (124) is arranged in the cavity of the shaft (122) through a sliding fit there between. 10. The tow bar assembly (120) according to any of the preceding claims, wherein the shaft (122) comprises a second end plug (125) fixed to the second end (122B) of the shaft (122) for enclosing the biasing member (123) to the cavity, which second end plug (125) is configured to rotationally lock the biasing member (123) to the shaft (122). 11. The tow bar assembly (120) according to claim 10, wherein the second end plug (125) comprises: - a form locking shape for engaging to the biasing member (123) and - a rotationally symmetrical shape (125a) for engaging to the dolly (110) in a rotatable manner, which rotationally symmetrical shape (125a) is distal from the form locking shape for engaging to the biasing member (123). 12. The tow bar assembly (120) according to any of the preceding claims, wherein the biasing member (123) is configured to resist winding and compression. 13. The tow bar assembly (120) according to any of the preceding claims, wherein the biasing member (123) is aspring, preferably a coil spring. 14. A dolly (100), characterized by comprising the tow bar assembly (120) according to any of the preceding claims. 15. The dolly (100) according to claim 14, wherein the dolly (100) comprises a chassis (110) with at least two mutually parallel beams (113) arranged at a distance from each other, wherein one of said beams (113) comprises a rotationally non-symmetrical opening (113a) for receiving the rotationally non-symmetrical shape (124d) of the first end plug (124) and the other one of said beams (113) comprises a rotationally symmetrical opening (113b) for receiving the rotationally symmetrical shape (125a) of the second end plug (125). 16. The dolly (100) according to claim 15, wherein the rotationally non-symmetrical opening (113a) of the dolly is dimensioned to: -receive the rotationally symmetrical shape (124a) of the first end plug (124) in a rotatable manner in a retracted axial position of the first end plug (124), and to - receive the rotationally non-symmetrical shape (124b) of the first end plug (124) in a non-rotatable manner in an extended axial position of the first end plug (124). 17. The dolly (100) according to claim 14, 15 or 16, wherein the chassis (110) of the dolly (100) comprises: - two mutually parallel longitudinal peripheral beams (111), - two mutually parallel transversal peripheral beams (112) connected by the longitudinal peripheral beams (111) to form a rectangular frame, wherein: - said beams (113) for receiving the end plugs (124, 125) of the shaft (122) are longitudinal cross beams and wherein - the shaft (122) is configured to be spanned between the longitudinal cross beams (113) within the periphery of the frame of the chassis (110) and protected by either of the transversal peripheral beams (112).

Patentanspriiche 1. Schleppstangenanordnung (120) fiir einen Rollwagen (100), wobei die Schleppstangenanordnung (120) umfasst: - eine Schleppstange (121); - eine Welle (122) mit einem ersten Ende (122A) und einem dem ersten Ende (122A) gegenuberliegenden zweiten Ende (122B), an welchen Enden (122A, 122B) die Welle (122) zurVerbindung der Schleppstange (121) mit dem Rollwagen (100) eingerichtet ist, um eine Rotation der Schleppstange (121) in Bezug aufden Rollwagen (100) um eine Drehachse (R) bereitzustellen, und - ein Spannelement (123), wie etwa eine Feder, diezum Spannen der Schleppstange (121) zu einer aufrechten Ausrichtung um die Drehachse (R) eingerichtet ist, - wobei die Welle (122) einen inneren Hohlraum umfasst, der sich entlang der Drehachse (R) erstreckt, dadurch gekennzeichnet, dass: - das Spannelement (123) in dem Hohlraum der Welle (122) angeordnet und daran drehgesichert ist, und dass - die Welle (122) einen ersten Endstopfen (124) am ersten Ende (122A) der Welle (122) zum EinschlieBen des Spannelements (123) in den Hohlraum umfasst, welcher erste Endstopfen (124) dazu eingerichtet ist, das Spannelement (123) drehgesichert an dem Rollwagen (100) zu verriegeln. 2. Schleppstangenanordnung (120) nach Anspruch 1, wobei die Welle (122) an der Schleppstange (121) befestigt ist. 3. Schleppstangenanordnung (120) nach Anspruch 1 Oder 2, wobei der erste Endstopfen (124) eine formschlussige Form (124d), wie etwa eine Nut, zum Eingriff an dem Spannelement (123) umfasst. 4. Schleppstangenanordnung (120) nach einem der vorhergehenden Anspmche, wobei das Ende des ersten End-stopfens (124) distal zu dem Spannelement (123) eine rotationssymmetrische Form (124a), wie etwa eine zylind-rische Form, umfasst. 5. Schleppstangenanordnung (120) nach einem der vorhergehenden Anspmche, wobei der erste Endstopfen (124) eine nicht rotationssymmetrische Form (124b), wie etwa einen Nocken, zum Eingriff an dem Rollwagen (110) auf-weist. 6. Schleppstangenanordnung (120) nach Anspruch 5, wobei die nicht rotationssymmetrische Form (124b) zum Eingriff an dem Rollwagen (100) zum Eingriff durch ein Werkzeug, wie etwa einen Schraubenschlussel, geformt ist. 7. Schleppstangenanordnung (120) nach Anspruch 1 oder 2, wobei der erste Endstopfen (124) umfasst: - eine formschlüssige Form (124d) zum Eingriff an dem Spannelement (123), geformt an der Fläche proximal zu dem Spannelement (123), -einen rotationssymmetrischen Körperteil (124c), dersich von der Fläche proximalzu dem Spannelement (123) entlang der Drehachse (R) erstreckt, - eine nicht rotationssymmetrische Form (124b), die sich von dem Körperteil (124c) entlang der Drehachse (R) erstreckt, und -eine rotationssymmetrische Form (124a), die sich von der nicht rotationssymmetrischen Form (124b) erstreckt. 8. Schleppstangenanordnung (120) nach einem der vorhergehenden Ansprüche, wobei das erste Ende (122A) der Welle (122) dazu eingerichtet ist, in Bezug auf den Rollwagen (100) drehgesichert zu sein, während das zweite Ende (122B) der Welle (122) dazu eingerichtet ist, in Bezug auf den Rollwagen (100) rotiert zu werden. 9. Schleppstangenanordnung (120) nach einem der vorhergehenden Ansprüche, wobei der erste Endstopfen (124) in dem Flohlraum der Welle (122) durch Gleitpassung dazwischen angeordnet ist. 10. Schleppstangenanordnung (120) nach einem der vorhergehenden Ansprüche, wobei die Welle (122) einen an dem zweiten Ende (122B) der Welle (122) befestigten Endstopfen (125) zum Einschließen des Spannelements (123) in den Flohlraum umfasst, welcher zweite Endstopfen (125) so eingerichtet ist, dass er das Spannelement (123) drehgesichert an der Welle (122) verriegelt. 11. Schleppstangenanordnung (120) nach Anspruch 10, wobei der zweite Endstopfen (125) umfasst: - eine formschlüssige Form zum Eingriff an dem Spannelement (123), und - eine rotationssymmetrische Form (125a) zum Eingriff an dem Rollwagen (110) auf rotierende Weise, welche rotationssymmetrische Form (125a) sich distal von der formschlüssigen Form zum Eingriff an dem Spannelement (123) befindet. 12. Schleppstangenanordnung (120) nach einem der vorhergehenden Ansprüche, wobei das Spannelement (123) dazu eingerichtet ist, Verwindung und Kompression zu widerstehen. 13. Schleppstangenanordnung (120) nach einem der vorhergehenden Ansprüche, wobei das Spannelement (123) eine Feder, bevorzugt eine Schraubenfeder, ist. 14. Rollwagen (100), dadurch gekennzeichnet, dass er die Schleppstangenanordnung (120) nach einem der vorhergehenden Ansprüche umfasst. 15. Rollwagen (100) nach Anspruch 14, wobei der Rollwagen (100) ein Fahrgestell (110) mit mindestens zwei zueinander parallelen Balken (113), die in einem Abstand voneinander angeordnet sind, umfasst, wobei einer der Balken (113) eine nicht rotationssymmetrische Öffnung (113a) zur Aufnahme der nicht rotationssymmetrischen Form (124d) des ersten Endstopfens (124) umfasst und der andere dieser Balken (113) eine rotationssymmetrische Öffnung (113b) zur Aufnahme der rotationssymmetrischen Form (125a) des zweiten Endstopfens (125) umfasst. 16. Rollwagen (100) nach Anspruch 15, wobei die nicht rotationssymmetrische Öffnung (113a) des Rollwagens dimensioniert ist zum - auf rotierbare Weise Aufnehmen der rotationssymmetrischen Form (124a) des ersten Endstopfens (124) in einer eingezogenen axialen Position des ersten Endstopfens (124), und zum - auf nicht-rotierbare Weise Aufnehmen der nicht rotationssymmetrischen Form (124b) des ersten Endstopfens (124) in einer ausgezogenen axialen Position des ersten Endstopfens (124). 17. Rollwagen (100) nach Anspruch 14, 15 oder 16, wobei das Fahrgestell (110) des Rollwagens (100) umfasst: - zwei parallel zueinander befindliche längsgerichtete Umfangsbalken (111), - zwei parallel zueinander befindliche quergerichtete Umfangsbalken (112), die durch die längsgerichteten Umfangsbalken (111) verbunden sind, sodass ein rechteckiger Rahmen gebildet wird, wobei: - die Balken (113) zur Aufnahme der Endstopfen (124, 125) der Welle (122) längsgerichtete Balken sind, und wobei - die Welle (122) dazu eingerichtet ist, zwischen den längsgerichteten Balken (113) innerhalb des Umfangs des Rahmens des Fahrgestells (110) eingespannt und durch einen der quergerichteten Umfangsbalken (112) geschützt zu werden.

Revendications 1. Ensemble de barre de remorquage (120) pour un chariot (100), l’ensemble de barre de remorquage (120) comprenant : - une barre de remorquage (121), - un arbre (122) présentant une première extrémité (122A) et une seconde extrémité (122B) en regard de la première extrémité (122A), à partir desquelles extrémités (122A, 122B) l’arbre (122) est configuré pour relier la barre de remorquage (121) au chariot (100) de sorte à fournir la rotation de la barre de remorquage (121) par rapport au chariot (100) autour d’un axe de révolution (R), et - un élément d’inclinaison (123) tel qu’un ressort, configuré pour incliner la barre de remorquage (121) vers une orientation verticale autour de l’axe de révolution (R), - l’arbre (122) comprend une cavité intérieure s’étendant le long de l’axe de révolution (R), caractérisé en ce que : - l’élément d’inclinaison (123) est agencé dans la cavité de l’arbre (122) et fixé en rotation à celle-ci, et en ce que - l’arbre (122) comprend un premier bouchon d’extrémité (124) sur la première extrémité (122A) de l’arbre (122) pour renfermer l’élément d’inclinaison (123) dans la cavité, lequel premier bouchon d’extrémité (124) est configuré pour verrouiller en rotation l’élément d’inclinaison (123) au chariot (100). 2. Ensemble de barre de remorquage (120) selon la revendication 1, dans lequel l’arbre (122) est fixé à la barre de remorquage (121). 3. Ensemble de barre de remorquage (120) selon la revendication 1 ou 2, dans lequel le premier bouchon d’extrémité (124) comprend une forme de verrouillage deforme (124d) telle qu’une rainure, pour la mise en prise dans l’élément d’inclinaison (123). 4. Ensemble de barre de remorquage (120) selon l’une quelconque des revendications précédentes, dans lequel l’extrémité du premier bouchon d’extrémité (124) distal à l’élément d’inclinaison (123) comprend une forme symétrique en rotation (124a), telle qu’une forme cylindrique. 5. Ensemble de barre de remorquage (120) selon l’une quelconque des revendications précédentes, dans lequel le premier bouchon d’extrémité (124) comprend une forme non symétrique en rotation (124b), telle qu’une came, pour la mise en prise dans le chariot (110). 6. Ensemble de barre de remorquage (120) selon la revendication 5, dans lequel la forme non symétrique en rotation (124b) pour la mise en prise dans le chariot (100) est formée pour être mise en prise avec un outil, tel qu’une clé. 7. Ensemble de barre de remorquage (120) selon la revendication 1 ou 2, dans lequel le premier bouchon d’extrémité (124) comprend : - une forme de verrouillage de forme (124d) pour la mise en prise dans l’élément d’inclinaison (123) formé dans la surface proximale à l’élément d’inclinaison (123), - une partie de corps symétrique en rotation (124c) s’étendant depuis la surface proximale à l’élément d’inclinaison (123) le long de l’axe de révolution (R), - une forme non symétrique en rotation (124b) s’étendant depuis la partie de corps (124c) le long de l’axe de révolution (R) et - une forme symétrique en rotation (124a) s’étendant depuis la forme non symétrique en rotation (124b). 8. Ensemble de barre de remorquage (120) selon l’une quelconque des revendications précédentes, dans lequel la première extrémité (122A) de l’arbre (122) est configurée pour être verrouillée en rotation par rapport au chariot (100), alors que la seconde extrémité (122B) de l’arbre (122) est configurée pour être tournée par rapport au chariot (100). 9. Ensemble de barre de remorquage (120) selon l’une quelconque des revendications précédentes, dans lequel le premier bouchon d’extrémité (124) est agencé dans la cavité de l’arbre (122) par un ajustement coulissant entre eux. 10. Ensemble de barre de remorquage (120) selon l’une quelconque des revendications précédentes, dans lequel l’arbre (122) comprend un second bouchon d’extrémité (125) fixé à la seconde extrémité (122B) de l’arbre (122) pour renfermer l’élément d’inclinaison (123) dans la cavité, lequel second bouchon d’extrémité (125) est configuré pour verrouiller en rotation l’élément d’inclinaison (123) à l’arbre (122). 11. Ensemble de barre de remorquage (120) selon la revendication 10, dans lequel le second bouchon d’extrémité (125) comprend : - une forme de verrouillage de forme pour la mise en prise dans l’élément d’inclinaison (123) et - une forme symétrique en rotation (125a) pour la mise en prise dans le chariot (110) de manière rotative, laquelle forme symétrique en rotation (125a) est distale de la forme de verrouillage de forme pour la mise en prise dans l’élément d’inclinaison (123). 12. Ensemble de barre de remorquage (120) selon l’une quelconque des revendications précédentes, dans lequel l’élément d’inclinaison (123) est configuré pour résister à l’enroulement et à la compression. 13. Ensemble de barre de remorquage (120) selon l’une quelconque des revendications précédentes, dans lequel l’élément d’inclinaison (123) est un ressort, de préférence un ressort hélicoïdal. 14. Chariot (100), caractérisé en ce qu’il comprend l’ensemble de barre de remorquage (120) selon l’une quelconque des revendications précédentes. 15. Chariot (100) selon la revendication 14, dans lequel le chariot (100) comprend un châssis (110) avec au moins deux bras mutuellement parallèles (113) agencés à une distance l’un de l’autre, dans lequel un desdits bras (113) comprend une ouverture non symétrique en rotation (113a) pour recevoir la forme non symétrique en rotation (124d) du premier bouchon d’extrémité (124) et l’autre desdits bras (113) comprend une ouverture symétrique en rotation (113b) pour recevoir la forme symétrique en rotation (125a) du second bouchon d’extrémité (125). 16. Chariot (100) selon la revendication 15, dans lequel l’ouverture non symétrique en rotation (113a) du chariot est dimensionnée pour : - recevoir la forme symétrique en rotation (124a) du premier bouchon d’extrémité (124) de manière rotative dans une position axiale rétractée du premier bouchon d’extrémité (124) et pour - recevoir la forme non symétrique en rotation (124b) du premier bouchon d’extrémité (124) de manière non rotative dans une position axiale étendue du premier bouchon d’extrémité (124). 17. Chariot (100) selon la revendication 14, 15 ou 16, dans lequel le châssis (110) du chariot (100) comprend : - deux bras périphériques longitudinaux mutuellement parallèles (111), - deux bras périphériques transversaux mutuellement parallèles (112) reliés par les bras périphériques longitudinaux (111) pour former un cadre rectangulaire, dans lequel : - lesd its bras (113) pour recevoir les bouchons d’extrémité (124,125) de l’arbre (122) sont des bras transversaux longitudinaux et dans lequel - l’arbre (122) est configuré pour être tendu entre les bras transversaux longitudinaux (113) dans la périphérie du cadre du châssis (110) et protégé par l’un ou l’autre des bras périphériques transversaux (112).

REFERENCES CITED IN THE DESCRIPTION

This list of references cited by the applicant is for the reader’s convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

Patent documents cited in the description • US 4856810 A [0002] [0004] · FR 2876957 [0005] • EP 2778015 A [0003] [0004]

Claims

Vonorúd és azt tarMme# ta.rg eget Izabadaimi igénypentök %, yösiőrüd elrendezés (320) targoncához (lOö), ahol a vonorúd elrendelés'CÍM) tartalmaz; - egy vonőrudat (121), - ler^ldlytpiai, amelynek első vége (122A) és az első véggel (122A) szemközti mlpélk végé (;122B) van, amely végeknél {122Á, 1228} a tengely :{i'É2) úgy van kialakítva, hogy összeköti a vonérudat (12í) a targenoáyal (;1ÜÖ), és lehetővé teszi a vonorúd (121) elfordulását a targoncához (löö) képest agy forgástengely (R) kőről, és - egy fesziíoelemet (123), mint például regét, á!í.ókh#yzetdé kényszeríti a forgástengely (R) körük - a tengelynek (122) belső ürege ma- aíförg;ás^r^i|1íy-':;C8f mentéé:, azzal pilemezvé, hagy '• a fesgitőeiém .(.123} a tengely (122) üregében van tl^ö.dé^ye'#SxtifötddlásmentéSé«· ven rögzítve ahéozy továbbá * a tengelynek (122) első végdugója (124) van a tengely (122;) első végén (122A) a feszstőeleni (123) bezárására az üregben, ahol az első végdugo (124} elfordulasmentesén rögzíti a fesgítoelemet (123} a targoncáhozflüi},
2, Az 1. igénypont szerinti venifűd elrendezés (12ü)f amelynél a tengely (122) a vonérüiboz (12.1) van rögzítve, 3:< Az 1, vagy 2, Igénypont szerinti vonérúd elrendezés (120}, erkélynél e első vég cl ug ó na k (124) slakzáro alakja (1240) van, például egy horony formájában, amely Összekapesolddlk a feszítőelemrnei (123).
4. Az előző igénypontok bármelyike szerinti vonó rúd elrendezés (120), amelynél az első végdugö (124) feszítőelemtől (123) távoli vége forgásszimmetrikus alakú (124a), például hengeres alakú, ®. Az előző Igénypontok elrendezés (120), amelynél az első vigdugónak (124) nem 'fargásazlmmitóJeys-(1240) van, példám egy bütyök, a targoncához: (X.10} csatlakozáshoz. I, Az5, Igénypont szerinti vonórúd elrendezés (120), amelynél a targoncához (100) esatiakozé ftepklbi^sszimmetHkus alak (1.24&), egy szer^áMfnii* ..példáol esavatkulcesá! megtóghetőan: van kialakítva, '7, Az 1. vagy iJigiéoypóekazérihfci yonörudíelgsodezés (120), amelynél azeísö végdugónak (124); * d ifasaftslelemhaá (123J: közei! felületen: .^é|||ol|';:ali§kzárdvan:, a IfesaítŐeíemhez (AIB) kapcsolódáshoz, > :a::fisaitÓelemhea | 123) közel! felületbikkslndölo része: (1:14c): van,a:(öfgástédgeíy (R) mentén, - a test részből (124c) kiinduló nem forgássZImroétríkdS^llkjá (124b) van a:: forgástengely (R) mentén, és - a nem iforgásszlrnmefrlkus alektál (124'!$ l|I24a) van. 8,: Azalözö igénypontok bármelyike szerinti vonórúd elrendezés fllO), amelynél a tengely (122) első vége (122A) égy van kialakítva, hogy eifdrdoláementeson rögzítve van a targoncához (iO0)> éhül e tengely (122) második vége (122B) a targoncához CtOÓt képest eltördlthetőan ven kialakítva. 9< AZ élező Igénypontok bármelyike szerinti: voniröd elrendezée (120), amelynél ez első y%dugi (124) e tengely (122) ö»^§éÉ#%-szooiitóil:*.':öÉ$§£# Illesztéssel van elrendezve,:
10, Az előző Igénypontok bármelyike szerinti vonórúd elrendezés (120), amelynél a tengelynek :(122) a tengely (1.22) második végéhez (122©) rögzítőt második: végdugép (125) is ved, amely a feszítőeiemet|12l) bezárja az üregben, ahol a második végdugó (125) elíordoiiementesen rögzíti a feszltöelemet (123) a tengelyhez (122),
11. Az 10, igénypont szerint! vonórúd elrendezés (1.20.¾ amelynél: emásodlk végdugónak (1:25): * a feszítöeíemhez (123) csatlakozó aiakzáró alakja van, és - a taiisöncához (110) elfördíthatóan csatlakozó forgásszimmetrikus alakja (125a) van, ahol a forgassz 1 mmetrikus a I ak (125a) a feszitőelamhez (123) csátiákoaó alakzáró alaktól távol található. Ϊ2. Az éMB Igéríypöntofe Mrmelyfe mmlm vonórúő: elrendezés .(120), amelynél m «leni (113) ^l^iásénirégrn^tenátí a csavarásnak és az összenyomásnak. í I. Az előzd igénypontok bármely lka szerinti vonötúd: elrendezés (120), amelynél a mszíteelem {123} é§y fúf& előnyösen ssavarragé,: 14, targonca (10% azzal jeflemezmib ángy az előző igáoypontök bármelyike szaríni vonórúő elrendezést (120) tartalmazza. l:S, A 14, igénypont szerinti targonca Clüd}, amelynél a targoncának (IQÖ) váza (110) van iegaiipls UM egymással párhuzamos rúddal (1 :t3| egymástól adott távelságbarg ahol az egyik rúdnak (M3) nem forgásszimmetrikus nyílása (113a} van, ez első végdugó (124) nem forgásszimmetrikus alakjának (1340) befogadására, és a maik rúdnak (113) forgásszimmetrikus nyílása (113b) van, a második vágdugo (12S) forgásszimmetrikus alakjának (12Sá) befogadására,
11, Á IS, igénypont szerinti targonca (100), amelynél a targonca nem fórgásizlmmeMkus nyílása :(1 Oe) úgy van méretezve, hegy:; - tOrgafóo^nr·' befogadja az első végőugó (124) forgásszimmetrikus alakját (i24a) az, első: végdugó (124) visszahúzóit tengely irányó helyzetében, és - nem forgathatóan befogadja az első: végdugó (124) nem: forgásszimmetrikus alakját (124b} az élod yágdygó C124} kihúzott tengelyirányú helyzetében:, 12, A 14, IS, vagy 16, Igénypont szerinti targoncái (1ÖD). iemelynéi a targonca (10Ö) váza (110} tartalmaz! - két. egymással párhuzamos hosszirányú szélső rudat (111}, - hosszirányú szélső rudakkal (111) osszekitőtt két párhuzamos keresztirányú rudat (112) egy négyszög alakú keret képzéséhez, ahol: •- ο tengely (122} yégdugáit (:1:24, 12S) befogadó rudak (113:) hosszirányú keresztrudak, és ahol " 0: tengely (123} a hosszirányú keresztrudak: (113} között van;elrendezve, á váz Cll©} keretén belül és védve van az egyik keresztirányú szélső rúd (112) által.