EP0723793A2 - Toy vehicle with tipping body, e.g. as a trailer for a pedal vehicle - Google Patents

Abstract

The box-shaped flatbed has a base (7), side (5) and transverse (6) walls and is supported by the chassis (1). The flatbed is mounted on the chassis near the corners so that it can be detached and locked. A lifting mechanism (9) consisting of movable elements is positioned between the transverse sides of the chassis. A steering column (14) is fixed to one element, and another steering column (14') to the other element. The facing ends of the steering columns form a joint swivel axle (21) on which is a slide element (23) mounted in a guide on the underside of the loading surface.

Description

The invention is directed to a children's play vehicle in the form of a tipper for a pedal crank vehicle, e.g. can be used as a trailer tipper for such a pedal crank vehicle, but also on another pedal crank vehicle for children, e.g. can be mounted in the form of a dumper or truck. Its main parts are a frame or chassis and a loading platform mounted on the chassis.

The invention was based on the task of providing the child playing with a tipper, which, with a constructive simplification, imitates the model from the adult world as well as possible and the special task of creating a tipper with simple means, which on all four sides , that is to say forward and backward, as well as being tiltable to both sides.

The invention includes a lifting mechanism consisting of two mutually displaceable elements with two links which are pushed together when one element is displaced in relation to the other in such a way that the distance between the pivot axes assigned to each link is shortened and their common pivot axis increases. A sliding element is attached to this common pivot axis, which lifts against one another when the elements are displaced and slides in a channel-like guide on the underside of the loading platform. The loading platform is mounted on the frame in its four corners so that two non-diagonally opposite bearings remain locked and two opposite can be released. When the platform is raised by the lifting mechanism, the loading platform then tilts forward or backward around the two locked bearings or to one of the two sides. An expedient form of the lifting mechanism is a telescopic lifting mechanism, consisting of a spindle sleeve to which the lower ends of one pair of links are articulated, and from a spindle on the spindle nut of which laterally displaceable spindle nut, the lower ends of the other pair of links are pivotally mounted.

Fig. 1

eine Unteransicht eines Rahmens eines erfindungsgemäßen Kinderspielfahrzeuges in verkleinertem Maßstab;

Fig. 2

die Seitenansicht des Rahmens nach Fig. 1;

Fig. 3

die Seitenansicht einer zum erfindungsgemäßen Kinderspielfahrzeug gehörenden Ladepritsche im Maßstab der Fig. 1 und 2;

Fig. 4

eine Vorder- oder Rückansicht der Ladepritsche nach Fig. 3;

Fig. 5

die Unteransicht der Ladepritsche nach den Fig. 3 und 4;

Fig. 6

einen Schnitt nach der Linie VI-VI in Fig. 4 mit in Fig. 1 nicht dargestellter zugehöriger Hülse der Ladepritsche;

Fig. 7

einen Schnitt durch einen Endkantenbereich der Ladepritsche, geschnitten längs der Linie VII-VII der Fig. 4;

Fig. 8a

einen Schnitt durch die Bodenplatte einer Ladepritsche, geschnitten längs der Linie VIIIa-VIIIa in Fig. 3;

Fig. 8b

einen Schnitt durch den Endbereich der Bodenplatte einer Ladepritsche mit angeformtem Scharnierstück, geschnitten längs der Linie VIIIb-VIIIb in Fig. 3;

Fig. 9

einen Schnitt durch einen Teil einer nach unten abgeklappten Seitenwand mit angeformtem Scharnierstück, geschnitten längs der Linie IX-IX in Fig. 3;

Fig. 10

eine Fig. 5 entsprechende Unteransicht mit einer teilweise abgewandelten Hülsenform in einem gegenüber Fig. 5 weiter verkleinertem Maßstab;

Fig. 11a bis 11d

eine besondere Art der Sicherung der Kipplagerung der Ladepritsche.

The invention is explained below using exemplary embodiments with reference to the drawings. They represent:

Fig. 1

a bottom view of a frame of a children's toy vehicle according to the invention on a reduced scale;

Fig. 2

the side view of the frame of FIG. 1;

Fig. 3

the side view of a loading platform belonging to the children's play vehicle according to the invention on the scale of FIGS. 1 and 2;

Fig. 4

a front or rear view of the loading platform of Fig. 3;

Fig. 5

the bottom view of the loading platform according to Figures 3 and 4.

Fig. 6

a section along the line VI-VI in Figure 4 with not shown in Figure 1 associated sleeve of the loading platform.

Fig. 7

a section through an end edge region of the loading platform, cut along the line VII-VII of Fig. 4;

Fig. 8a

a section through the bottom plate of a loading platform, cut along the line VIIIa-VIIIa in Fig. 3;

Fig. 8b

a section through the end portion of the bottom plate of a loading platform with a molded hinge piece, cut along the line VIIIb-VIIIb in Fig. 3;

Fig. 9

a section through part of a folded down side wall with a molded hinge piece, taken along the line IX-IX in Fig. 3;

Fig. 10

a bottom view corresponding to FIG. 5 with a partially modified sleeve shape on a scale further reduced compared to FIG. 5;

11a to 11d

a special way of securing the tipping bed of the loading platform.

Main parts of the children's play vehicle according to the invention are a base frame (Fig. 1 and 2) and the tilting loading platform carried by this (Fig. 3 to 5 and 10).

The example shown in FIGS. 1 and 2 shows the base frame of the tipper as a trailer tipper. For this purpose, a plastic part e.g. manufactured in the blowing process, generally designated 1, provided with which the trailer fork 2 can be formed from one piece. The frame 1 also includes a wheel bearing box 4 which supports the wheel axles 3 and which, e.g. - Not shown in the drawing - can be shaped as a leaf spring package imitation.

The frame is designed as a tub or open box with two raised side bolsters 5,5 ', two raised transverse bolsters 6,6' and a bottom 7. On the Transverse cheeks 6, 6 'are attached, for example screwed, to bearing blocks 8, 8', in which the lifting mechanism, generally designated 9, is mounted and the outer ends of which are designed as ball-head bearings 10, 10'-10a-10a 'for a purpose described later.

In the exemplary embodiment shown, the lifting mechanism 9 consists of a spindle sleeve 11 with an internal thread mounted in the bearing block 8 and a spindle 12 rotatably mounted in the bearing block 8 ', which ends in a handle, suitably crank 13.

The spindle sleeve 11 is assigned a pair of links with the levers 14, 14 'and the spindle 12 a pair of links with the levers 15, 15'. The levers 14, 14 'can be pivoted about the axis 16 and the levers 15, 15' about the axis 17. The axis or axes 16 are mounted on a sleeve 18 fastened to the spindle sleeve, while the axis or axes 17 are mounted on a spindle nut 19. The ends of the links opposite the axes 16, 17 have a common pivot axis 21, two links, e.g. the links 14, 14 'are connected by a bridge 22 on which a sliding element, in the example shown a ball 23, is fastened.

If the spindle 12 is rotated in one direction with the help of the crank 13, the spindle nut 19 is displaced in the direction of arrow A in the direction of the sleeve 18 and the distance between the axes 16 and 17 is shortened, as a result of which the handlebars are inevitably raised (FIG. 2 ) and thus the sliding element, for example a ball 23, is raised. This also tilts the loading platform in a manner described later.

The loading platform shown in FIG. 3 in side view, in FIG. 4 in rear view and in FIG. 5 in bottom view consists of a base plate 24, on the outer edge of which side walls 25, 25 'and transverse walls 26, 26' by hinges 27 are articulated. On two opposite side walls, e.g. the transverse walls 26, 26 ', pins 29 are provided on the upper edge 28 in their shape and are mounted on a buffer block, and on the other side walls, e.g. the side walls 25, 25 ', hook 30, the notches 31 of which lie in the normal state of the loading platform around the pins 29, so that all side walls 25, 25'-26, 26' can thereby be locked together.

On the underside of the base plate 24, sleeves 32, 32'-32a, 32a 'which are open at the corners downward are also fastened, the spacings of which in the longitudinal and transverse directions correspond to those of the ball-head bearings 10, 10'-10a, 10a'.

6, which is a sleeve, e.g. Sleeve 32, on a larger scale compared to FIGS. 1 to 5, the sleeves have slots 33 facing one another and which are open at the bottom. With these sleeves, the loading platform is connected to the frame in which the sleeves with the slots are pushed over the ball head bearings 10 until they rest on the round intermediate pieces 34 connecting the bearing blocks 8 with the balls 5.

The loading platform is secured against lifting by easily detachable bolts inserted into the transverse bores 35 of the sleeves 32.

With the help of the sleeves 32, the loading platform is connected to the frame when all the sleeves are secured by bolts, but the sleeves 32 also form the pivot bearing when the platform is to be tilted. E.g. the sleeves 32a, 32a 'are unlocked, i.e. When the bolts are pulled out, the unlocked sleeves 32, 32 'serve as pivot bearings and the platform can be tilted in the direction of arrow B. On the other hand, e.g. the sleeves 32 ', 32a' are unlocked and the remaining sleeves remain secured, the platform can be tilted in the direction of arrow C and, conversely, the sleeves 32 and 32a can be unlocked in the direction of arrow D.

Here, tilting in the direction of arrow B or vice versa mainly occurs in that the sheet 33 'connecting the two vertical edges of the slot 33 rolls on the roller-shaped intermediate piece 34, while the tilting in the direction of arrow D or c, i.e. transversely to the plane of the drawing, by sliding the sleeve on the balls 10, 10a or 10 ', 10a'.

The loading platform can also be tilted in the opposite direction of the arrow B when the sleeves 32, 32 'are unlocked, but it is unusual when the transverse walls 26 of the trailer fork 2 are turned to pour the load over the fork. Therefore, a transverse wall as a rear wall without the hinges 27 could also be firmly connected to the base plate, but the embodiment shown with two hinged side walls and two hinged transverse walls has the advantage that when placing the loading platform on the frame one does not have to pay attention to which one the transverse walls is the rear wall facing the trailer fork.

When the lifting mechanism 9 is actuated, the sliding element, which is raised or lowered and also displaced by the material, slides when the loading platform is fitted in a channel-like guide formed between the webs 36, 36 'attached or formed on the underside of the base plate 24 and the part of the underside of the base plate between them. e.g. Rail 37, whereby the loading platform is raised or lowered when the lifting mechanism is actuated. Whether the loading platform is tilted backwards or to the side depends, as already described, on which of the sleeves 32 remain secured by bolts inserted through transverse holes 35 and which have been released by pulling the same. Instead of the ball 23 shown in the drawings, a slide block adapted to the rail 37 or a cylinder piece sliding in the guide 37 can of course also be used. Ball and cylinder piece have the advantage of lower friction. After tipping, the respective side or transverse wall is unlocked by lifting the hooks 30 and can then fall down to release the bulk material (FIG. 9).

Since the side walls 25, 25 'and the transverse walls 26, 26' are only connected to the base plate via the hinges 27, a construction of the vertical end edges or regions stiffening the box consisting of the folded-up side walls and transverse walls is provided according to FIG. 7 which is illustrated in section. For this purpose, the side walls of the loading platform are designed to interlock with one another at their vertical end edges. The end edge region 38 of the transverse wall 26, for example, has a step 39, into which the step 40 of the end edge region 41 of the side wall 25 is inserted when the walls are locked.

The connection of the side walls 25, 25 'and transverse walls 26, 26' with the base plate 24 is such that, when the bulk goods picked up by the loading platform are tilted, nothing of these can get into the space that occurs when the side walls are folded up after the platform has been emptied between the lower edges of the walls and the base plate the vertical position of the side walls and thus their locking to the box prevented or would require a prior cleaning of this area. 8, the hinge pieces 27a, 27a '(FIG. 5) are placed on the underside of the edges of the base plate 24 in such a way that the bore for the hinge pin 42 is half through a groove 43 on the underside of the base plate, half through the hinge pieces 27a, 27a 'are formed. One part of a wall, e.g. Side wall 25, forming hinge piece 27b merges into a rib 44, which at the same time stiffens the wall and faces inwards when the wall is folded up, which forms an inclined surface 45 when the wall is folded down. 24 'illustrates a slanted position of the base plate during the tilting process. The bulk material sliding on the outer surface of the base plate when tipping then falls onto the inclined surface 45 and can slide down from it, thereby preventing bulk material residues from entering the space 46, where, if they stick, they follow the vertical installation of the side walls prevent tipping or were made significantly more difficult.

Because it is not possible in this branch of toy technology with its relatively large parts made of plastic by injection or blow molding and thus subject to a certain shrinking process, all functional parts are made to measure with the least possible To produce tolerance, a pair of sleeves, for example a pair of sleeves corresponding to sleeves 32, 32 'of FIG. 5 according to FIG. 10, can be formed as a pair of elongated sleeves 47, 47'. Production-related dimensional fluctuations of the functional parts are then absorbed by these elongated sleeves. Because the frame and loading platform are larger in the longitudinal direction than in the transverse direction and therefore errors in this direction also have a greater effect and because there must be some play between the ball heads 10 and the sleeves receiving them anyway, it is sufficient to use the sleeves 47, 47 '. to make longer than the sleeves 32a, 32a '. A different shrinkage will occur in particular if, for example, the frame (FIGS. 1 and 2) is blow-molded and the loading platform (FIGS. 1 to 5) is manufactured as a molded part. The shrinkage mainly affects in a relatively short time after the completion of the frame and / or the loading platform. Therefore, this shrinkage can also be taken into account in that one of the bearing blocks 8 or 8 'can be screwed into longitudinal slots in such a way that with four round sleeves 32 that bearing block is adapted to the longitudinal sleeve distance (arrow direction A or B), after the frame has cooled completely and Flatbed is set.

11a to 11d illustrate a modification of the invention which prevents a safety bolt from sliding out or being pulled out of the sleeves still connecting the loading platform to the frame in the tilted state. For tilting the loading platform, two non-diagonally opposite sleeves are unlocked, for example sleeves 32,32 'or 32a, 32a' for tipping forward or backward, or sleeves 32 ', 32a' or 32,32a for tipping to the side. In order to the loading platform cannot completely detach from the frame, it is assumed that the remaining sleeves remain secured on the ball heads 10 receiving them. This can be done, for example, in that the securing bolt 48 shown in FIG. 10 has a groove 50 near its end opposite the head 49, into which a slotted ring is pressed in a manner known per se, which, in order not to be lost, by a thin band is firmly connected to the bolt 48. The playing child can also forget to attach this safety device, and then there is a risk that the possibly loaded platform unintentionally detaches completely from the frame. In order to prevent this, an alternative proposal of the invention provides to equip each ball head along two meridians offset by 90 °, each with a nose 51 or 52, one of which in the tilted position of the loading platform into a longer one, approximately in the middle of the bolt shaft molded groove 53 engages and thus prevents the safety bolt from sliding out or being pulled out.

11a to 11d each show a sleeve at the end of the loading platform 54, which is only schematically indicated, in the untilted or in the laterally or rearwardly tilted position.

Fig. 11a schematically shows one end of a loading platform 54 in the untilted, horizontal position and shows a sleeve 32 projecting vertically downward from the underside of the loading platform, which is placed with its slot 33 (Fig. 6) on the cylindrical intermediate piece 34, which connects a ball head 10 to the bearing blocks 8 of the ram 1. In addition, one can see the locking bolt 48 inserted through corresponding holes in the sleeve wall, which holds the ball head received by the sleeve between itself and the underside of the loading platform and thus prevents the sleeve from lifting off the ball head. If the loading platform is to be tilted backwards, the sleeves 32, 32 '(FIG. 5) must be unlocked, while the sleeves 32a, 32a' form the pivot bearing, so to speak, and therefore must remain locked by the bolts 48. 11b, the ball head 10 belonging to the frame 1 remains in a fixed position, while the sleeves 32a, 32a 'pivot with the tilted platform on the ball head and thus also the bolt 48 is pivoted out of the central axis M, whereby the Nose 51 on the ball head reaches into the groove 53 of the bolt, which then cannot slide out or be pulled out.

Figures 11c and 11d illustrate the same principle of lateral tilt, e.g. 5 the sleeves 32, 32a remain locked and the sleeves 32 ', 32a' are unlocked, in which case the loading platform would be tilted in the direction of the arrow D. In this case, the bolt 48 with its central groove 53 can be seen from the side. 11c, the nose 52 lies in such a way that the bolt can be displaced in its central axis, while in the tilted position according to FIG. 11d the nose 52 engages lengthwise in the groove 53 of the bolt 48 and thus engages Slipping out of the bolt from the sleeve is avoided as long as the loading platform has not been returned to its horizontal, untilted position.

Claims (11)

Children's toy vehicle in the form of a tipper, e.g. as a trailer tipper for a pedal crank vehicle, with a chassis frame consisting of side and cross cheeks, the wheels supporting the wheels and with a box-shaped loading platform carried by the frame and consisting of a base plate and side and cross walls, characterized in that the Loading platform is hingedly locked and unlockable on the frame near its corners and a lifting mechanism consisting of mutually displaceable elements is provided between the transverse cheeks of the frame, on one element of which a link and on the other element of which another link is pivotally mounted, and that mutually facing ends of the handlebars have a common pivot axis, on which a sliding element is attached, which is slidably mounted in a guide on the underside of the loading surface and, when it is displaced by the handlebars, raises the loading platform in the direction whose bearing unlocks nd. Children's play vehicle according to claim 1, characterized in that 1. the frame (1) has four ball head bearings (10) which project laterally beyond the side cheeks (5) and are close to the corners and are connected to the frame by means of short intermediate pieces (34); 2. on the underside of the base plate (24) of the loading platform at a distance from the ball head bearings (10) sleeves (32) are arranged which on the side facing the frame have a vertical slot opening into the lower sleeve edge and taking up part of the sleeve length (33 ) have in such a way that the loading platform with the sleeves can be pushed over the ball head bearings in such a way that it sits on the intermediate pieces (34) with the slot top edges (33); 3. a lifting mechanism (9) is mounted in the frame, which consists of a spindle sleeve (11) mounted in a transverse cheek and a spindle (12) with a handle (13) and two in the other transverse cheek, rotating in the spindle sleeve (11) There are pairs of links, one pair of links (14) with one end on the spindle sleeve (11) and the other pair of links (15) with one end on a spindle on the spindle by rotating the same laterally displaceable spindle nut (19) and the opposite ends the pairs of links have a common pivot axis (21) which carries an upwardly projecting sliding element, for example a ball (23) or a sliding block; 4. In the longitudinal center plane of the loading platform on the underside between the sleeves (32) a guide, for example rail (37), is arranged, between the webs of which the sliding element (23) of the lifting mechanism (9) slides when the loading platform is tilted and lowered; 5. The ball head bearings (10) in the sleeves (32) can be held (locked) or released (unlocked) individually against sliding out. Children's toy vehicle according to claims 1 and 2, characterized in that at least two opposite side walls (25, 25 ') and a transverse wall (26 or 26') of the loading platform are connected to the base plate (24) via hinges (27) which are connected to the Outer edges of the base plate are arranged. Children's toy vehicle according to claims 1 and 3, characterized in that the vertical side edge regions (38, 41) of the side and transverse walls (25, 26) each have a step (39, 40) in horizontal cross-section and the steps when locking the side and Interlocking cross walls to the closed platform box. Children's toy vehicle according to claims 1 to 4, characterized in that each hinge (27) consists of at least one hinge piece (27a) forming part of the base plate (24) and one part of a side wall (25, 25 ') or transverse wall (26, 26 ') forming hinge piece (27b) and between each hinge piece (27a) of one hinge and the hinge piece (27a') of the adjacent hinge a groove (43) is formed in the underside of the base plate (24), the cross section of which is part of the Cross section of the hinge pin (42) corresponds. Children's toy vehicle according to one or more of claims 1 to 5, characterized in that each hinged side and transverse wall of the loading platform close to the hinge piece (27b) has an inclined surface (45) which extends across the width of the wall and, when the wall is folded down, extends outwards and downwards ) having. Children's toy vehicle according to claim 2, characterized in that for the locking of the sleeves (32) there are provided locking bolts (48) which can be inserted and extracted through two holes (35) in the sleeve wall located below the spherical head (10) accommodated by a sleeve. Children's toy vehicle according to claim 7, characterized in that the securing bolt (48) in the area which lies in the middle of the sleeve (32) when the bolt is inserted has a circumferential groove (53) into which the loading platform (54 ) caused inclination of the sleeve engages a projection, such as a nose (51 or 52) on the ball head (10). Children's toy vehicle according to claim 8, characterized in that a projection, for example a nose (51 and 52), is attached to each ball head (10) on two meridians lying at right angles to one another so that when the sleeves (32) are tilted when tilting in the one direction, for example backwards (arrow B), the one nose (51) and when tilting in the other direction, for example laterally (arrows C, D), the other lug (52) engages in the circumferential groove (53) of the securing bolt (48). Children's toy vehicle according to claim 2, characterized in that a pair of sleeves (for example, sleeve 32, 32 ') formed from two sleeves located opposite one another at short intervals consists of circular sleeves and the other pair of sleeves (for example 47, 47') consists of elongated sleeves. Children's toy vehicle according to claim 2, characterized in that at least one of the bearing blocks (8 or 8 ') in the longitudinal direction in slots for adaptation to the distance between the pairs of sleeves (32,32'-32a, 32a') on the transverse cheeks (6,6 ') the frame is screwable.

Images