DE202005008098U1 - Dolly - Google Patents

Abstract

Dolly with a frame (3) and a plurality of pivotable casters (5, 6), which have a receiving region (12) for a deflector ring (13), characterized in that the trolley (1) has a controllable Securing device (2) for inhibiting the pivoting movement of at least a pivoting roller (5, 6), wherein the securing device (2) a drive (15) and one or more driven actuators (18) arranged with a in the receiving area (12) Inhibiting element (19) cooperate.

Description

The The invention relates to a trolley with the features in the preamble of the main claim.

Such a dolly is out of the DE 81 09 855 U1 known. It consists of a frame with four freely pivoting and freely rotatable casters, each having a deflector and have a receiving area for this deflector ring. Such trolleys or shopping carts can be moved everywhere by the operators or shopkeepers and also brought in an undesirable manner from the shop area and taken home.

The DE 203 14 705 U1 shows an anti-theft device for such a dolly, with the two or more casters can be fixed in predetermined steering positions. The fixation is achieved by spring-loaded bolts that engage in a recess on the roller. This arrangement requires major modifications to the trolley and is not very suitable for retrofitting existing trolley.

From US-A-4,591,175 and the US 6,362,728 B1 However, other anti-theft devices are known in which, however, the rolling movement of the roller or the wheel is blocked by a brake built into the reel body. This has an increased role wear and maintenance costs with corresponding cost disadvantages result.

The DE 40 08 855 A1 discloses a transport container having a landing gear with a plurality of conventionally formed casters pivotally mounted on the container bottom, which can be blocked in two ways. On the one hand, a rolling brake is present, which consists of a wheel brake body with an external toothing, which can be brought into engagement with a counter toothing on the wheel and blocks its rotational movement. In addition, a swivel block is present, wherein a drag shoe made of rubber or the like is pressed against the back bearing of the associated roller and blocks the pivotal movement by frictional engagement.

The DE 297 04 204 U1 deals with a caster or castor whose rotation can be locked with a blocking element. A pivotal block of the roller is not addressed.

In the DE 84 11 933 U1 is a blocking brake for rollable containers, especially trolley, addressed. The casters are operated together with a rod mechanism, each roller is associated with an adjustable against the tread brake plate, which is actuated against spring force by the linkage. As a result, the rolling motion of the roller is blocked.

The DE 83 24 703 U1 shows essentially the same locking brake as the aforementioned font and is from the same applicant.

The EP 0 678 438 B1 is concerned with a braking system for driving containers, where, as in the cited references, the aim is to jointly actuate all the brakes by means of a pedal or other triggering device, whereby brake pads are pressed against the running surfaces of the rollers.

It Object of the present invention, a better way to the equipment a trolley with a controllable security device show.

The Invention solves this task with the features in the main claim.

The Arrangement of a locking device belonging to Hemmelements in the receiving area of a Abweisrings on one or more casters has the advantage a low construction cost and also allows the cost-effective and easy retrofitting existing transport or shopping cart with a security device. It is inhibited the pivoting movement of at least one swivel caster, being the driving and maneuverability the transport or shopping cart and thus the unwanted entrainment is considerably impeded by a customer or the like, which is contrary to excessive role wear acts.

in this connection offers the claimed solution different design options. On the one hand, the deflector ring itself can be designed as an inhibiting element be and fulfill a dual function. On the other hand lets replace the existing deflector ring by an inhibitor, which at said receiving area and thus at a prepared assembly point can be attached. In this version is the inhibitory function in the foreground, with the rejection effect in whole or in part can be waived. In a further variant can on the Hemmelement a deflector be rotatably arranged, so that in turn a double function exists, in which, however, in a modification to first variant of the deflector receives an additional rotation.

The inhibitor can be connected by means of drivers or the like rotationally connected to the castor and in particular with its roll holder. This also offers easy and cost favorable design options.

Existing Abweisringe can supplemented with such a driver become. For original equipment may be a driver to a deflector or to another inhibitor molded or otherwise connected to this. For the fulfillment of Inhibition function can be said connection between driver and Swivel castor with positive locking or non-positively or a combination of positive and non-positive.

The said inhibitory effect means that the caster does not necessarily completely blocked and in one or more specific steering positions must be fixed. It is sufficient, when the free pivoting of the caster around its bearing axis limited to the frame and insofar is inhibited. A dolly and in particular a Shopping cart with one or more only limited pivoting Casters make the vehicle unwieldy and difficult to move, what for the Sufficient fuse effect. A fixation or blockage is alternatively also possible. By the controllability of the safety device occurs the inhibitory effect the driving movement only in certain and by the owner of the Transport cart in predetermined situations, such as when a customer with the transport cart the surrounding area of a shop, e.g. the parking lot and / or the surrounding sidewalks, wants to leave. In such a case, the safety device is remotely controlled fires e.g. by radio signal, magnets, induction loops or the like

to Achieving the inhibitory effect, there are also different execution options. On the one hand is a form-fitting Intervention of a movable actuating element of the securing device a corresponding receptacle of the hemmelement or rejection ring, e.g. possible in a local hole. On the other hand, the inhibitory effect can also be frictionally by braking and one of the pivoting movement opposed friction torque can be generated. Therefor a sanding track can be used. The braking effect can be increased by friction linings. Furthermore the grinding track may have a curved path, by means of which the Caster in certain pivot positions snaps, from which they Although it can be moved out again, which requires an increased effort conditionally and because of the adjoining curves also immediately snap back into the next curve recess and corresponding pivoting position brings with it.

In the dependent claims are further advantageous embodiments specified.

The The invention is for example and schematically in the drawings shown. In detail show:

1 : a fragmentary plan view of a trolley with casters and a safety device,

2 a longitudinal section through the securing device according to section line II-II of 1 and

3 : An enlarged and broken plan view of the safety device and the castors with several design variants of the Hemmelements.

1 shows in a broken plan view of a trolley ( 1 ), which is, for example, a shopping cart or another manually operated transport device. The trolley ( 1 ) has a broken illustrated frame ( 3 ), on which several casters ( 5 . 6 ) in normal operation, preferably freely pivotable by means of pivot bearings ( 9 ) and pivot axes ( 10 ) are stored. The castors ( 5 . 6 ) are also freely rotatably mounted for the rolling and driving movement. 1 shows the front area of the trolley ( 1 ) with the two front casters ( 5 . 6 ). The longitudinal struts of the frame ( 3 ) are by a cross strut ( 4 ) connected and stiffened.

The frame ( 3 ) of the trolley ( 1 ) may include a basket, platform or other suitable receptacle for purchases and merchandise. Furthermore, the frame has ( 3 ) at a suitable location, for example at the back, a handle or bracket with which the trolley ( 1 ) can be pushed. For the sake of clarity, these car parts are just as little represented as the rear castors. In the embodiment shown, the trolley ( 1 ) four swivel castors. The number may alternatively be smaller or larger.

The trolley ( 1 ) has a controllable safety device ( 2 ) for inhibiting the pivoting movement of the castors ( 5 . 6 ) in special cases. The safety device ( 2 ) can in particular an anti-theft device ( 2 ) be. In addition, other applications are possible. By the safety device ( 2 ) can be prevented, for example, that a trolley ( 1 ) enters the areas of a building or facility for which it is not intended. A preferred application is the aforementioned theft protection ( 2 ), with which it can be prevented that the trolley ( 1 ), in particular in the form of a shopping trolley ( 1 ), from the area of a shop, a mall or the like, is spent by customers. This is for example prevented or by the said inhibition at least considerably more difficult, that the transport vehicle ( 1 ) is moved and removed from the parking lot area or from the immediately adjacent walkways.

The safety device ( 2 ) has a drive for this purpose ( 15 ) and one or more thereof driven and movable control elements ( 18 ), with an inhibitor ( 19 ) acting together in a receiving area ( 12 ) for a deflector ring ( 13 ) is arranged. By the inhibitor element ( 19 ), the pivoting movement of the impinged casters ( 5 . 6 ) impedes or blocks, which also leads to an inhibition of the driving movement. This means that at least the maneuverability of the trolley ( 1 ) and thus makes handling uncomfortable or even impossible.

The safety device ( 2 ) has a trigger (not shown), with which it can be remotely controlled and triggered only when needed. For such a trigger there are a variety of execution options. For example, stationary magnetic sleepers, induction loops or the like may be recessed in the ground or elsewhere at the edge of a parking space or other area cleared for unhindered transport carriage movement, which in transit or passing by means of a corresponding sensor, not shown in the drawing Safety device ( 2 ), by means of a suitable control (not shown) the safety device ( 2 ) and their inhibitory function triggers. The inhibition function can be reversed and resolved by a counter signal. The circuit possibilities for such an inhibition function are described, for example, in US Pat. No. 4,591,175 and US Pat US 6,362,728 B1 to find. Alternatively, a triggering by radio or the like. Be given if, for example, the trolley ( 1 ) leaves a radio area and the safety device ( 2 ) responds to the absence of the radio signal.

2 shows in longitudinal section the safety device ( 2 ) and the design and storage of the two castors ( 5 . 6 ). The castors ( 5 . 6 ) consist of at least one role ( 7 ), which in a usually fork-shaped roll holder ( 8th ) is mounted freely rotatable about a horizontal axis. The roll holder ( 8th ) is in turn via the said pivot bearing ( 9 ) and the upright, usually vertical pivot axis ( 10 ) on a fitting ( 11 ) of the frame ( 3 ) pivotally mounted. The roll holder ( 8th ) in this case has a raised area with a plan view in the usually circular shape, the inner receiving area ( 12 ) for an attached deflector ring ( 13 ). This recording area ( 12 ) serves as a bearing head for receiving the also circular Abweisrings ( 13 ). Such a deflector ring ( 13 ) is in conventional trolley, for example, according to the DE 81 09 855 U1 are formed, usually present and possibly freely rotatable on the bearing head ( 12 ) stored.

The safety device ( 2 ) has one or more inhibiting elements ( 19 ), which are connected to said actuating elements ( 18 ) and those in the reception area ( 12 ) are arranged. By this arrangement, it is possible to use a deflector ring ( 13 ) as an inhibiting element ( 19 ), as in 1 to 3 is shown. In this case, the deflector rings ( 13 ) or inhibiting elements ( 19 ) with the swivel caster ( 5 . 6 ) connected. For this purpose, the conventional deflector ring ( 13 ), which does not normally have this rotational connection, to the inhibitor element ( 19 ) be converted and reworked or supplemented accordingly. He can, for example, the in 2 shown forked or semi-annular and downwardly projecting driver ( 14 ), the form-fitting via the roll holder ( 8th ) attacks. Due to the rotation, all pivoting movements of the castor ( 5 . 6 ) and its roll holder ( 8th ) on the inhibiting element ( 19 ) or the correspondingly adapted Abweisring ( 13 ) transfer. The deflector ring ( 13 ) or the inhibiting element ( 19 ) rotate with the roll holder ( 8th ) around the pivot bearing ( 9 ) on the fitting ( 11 ). Conversely, the inhibition of the rejection ring described below ( 13 ) or Hemmelements ( 19 ) also to an inhibition of the castor ( 5 . 6 ).

In a modification of the embodiments shown, a conventional deflector ring, for example, according to the DE 81 09 855 U1 or otherwise formed and removed by an inhibiting element ( 19 ) be replaced. For this purpose, the pivot bearing ( 9 ), whereby the conventional Abweisring deducted and the inhibitor ( 19 ) on the receiving area ( 12 ) can be plugged. The inhibitor element ( 13 ) may then be designed differently than in the embodiments shown. It can no longer, for example, in the manner shown in the embodiments via the roll holder ( 8th ) protrude laterally and exercise a rejection function. In this variant, the inhibiting element ( 19 ) and be particularly adapted to the inhibitory function.

In a third variant, it is also possible to exchange an existing deflector ring and by an inhibiting element ( 19 ), which additionally carries a smaller or thinner deflector ring, which can also be freely rotatably mounted on the inhibitor.

The said construction variants can be applied to existing transport vehicles ( 1 ) by exchange or retrofit structural alteration of existing deflector rings. With the mentioned design variants, new transport trolleys ( 1 ) are factory-equipped in the original equipment.

The inhibition function can be effected in various ways, wherein 2 and 3 specify different variants. The said inhibitor element ( 19 ) has at least one recording ( 20 ) for the interaction and preferably for the engagement of the actuating element ( 18 ). In this case, optionally on the inhibiting element ( 19 ) a single shot ( 20 ), which by the engagement of the actuating element ( 18 ) for a blockage of the impinged caster ( 5 . 6 ) in a certain and selectable pivot position provides. If this pivotal position on adjacent casters, eg on the two front casters ( 5 . 6 ), is different, the trolley ( 1 ) only very difficult to push and maneuver or steer and does not roll in the usual way. The recordings ( 20 ) are preferred for the fulfillment of the inhibition function at the periphery of the inhibition ( 19 ) arranged.

The recordings ( 20 ) can also be present multiple times and different angular positions with respect to the pivot axis ( 10 ), like this 3 clarified in the right half of the picture, so that a caster ( 5 . 6 ) can be blocked in several different pivot positions.

For the mentioned blockade or fixation, the recording ( 20 ) as holes ( 21 ) be formed, which as a blind hole or as a through hole in the inhibiting element ( 19 ) can be designed. The shape and size of the holes ( 21 ) is connected to the preferably plunger-type and spring-loaded actuator ( 18 ) and allow its positive engagement as soon as the caster ( 5 . 6 ) when moving the trolley ( 1 ) assumes a suitable pivoting position. The pivoting movement of the castor ( 5 . 6 ) is thereby positively locked and blocked.

In the sense of the aforementioned inhibition, it may also be sufficient to control the pivotal movement of one or more casters ( 5 . 6 ) and in particular to slow down. This is eg by friction and sliding contact by means of in 2 and 3 in the respective right half of the image shown grinding track ( 22 ) at the periphery of the inhibition ( 19 ) possible. 2 illustrates the variant of an annular, possibly to the pivot axis ( 10 ) concentric and in the outer periphery of the Hemmelements ( 19 ) recessed mounted sanding track ( 22 ). In this ringnutartigen grinding track ( 22 ) can at the groove bottom a friction lining ( 23 ) to be available. That in the sanding track ( 22 ) from the outside immersing actuator ( 18 ) presses with force against the bottom of the grinding track ( 22 ) and there optionally disposed friction lining ( 23 ). As a result, a frictional force or a friction torque is generated, which determines the pivoting movements of the impinged caster ( 5 . 6 ) brakes and thereby the maneuverability of the trolley ( 1 ) significantly impedes and inhibits.

In the embodiment shown, the plunger has ( 18 ) at the front end of a cylindrical shape, wherein the grinding track ( 22 ) has a substantially rectangular cross-section. Alternatively, corresponding wedge shapes or conical shapes on both parts ( 18 . 22 ), which in addition to a contact and a braking effect on their sloping walls lead.

3 also shows in the right half of the picture hinted at another variant of the grinding track ( 22 ), in this case as a curved path ( 24 ) is formed, which in places at the periphery of Hemmelements ( 19 ) may be present or extending there circumferentially. The curved path ( 24 ) has variable depths into which the plunger-like inhibiting element ( 18 ) can dive accordingly far. Does it by a pivoting movement of the caster ( 6 ) to a trough-shaped, concave depression in the curved path ( 24 ), the actuator snaps ( 18 ) here and can be moved out of the relatively stable engagement position again only with increased effort to pivot the pivot roller ( 6 ) around the axis ( 10 ). At the raised and convex parts of the curved path ( 24 ) results from the rounding an unstable position, so that the force of the actuating element ( 18 ) and the curved oblique force attack to a renewed pivotal movement of the caster ( 5 . 6 ) in the tub position and a snap of the actuating element ( 18 ) to lead.

In 2 is schematically a possible embodiment of the drive ( 15 ) and the control elements ( 18 ). For this purpose, below the transverse strut ( 4 ) a transverse guide ( 25 ) between the casters ( 5 . 6 ) and on the frame-fixed fittings ( 11 ) attached. In the leadership ( 25 ) are the control elements ( 18 ) axially movable and mounted in preferably aligned arrangement and linearly guided in the axial direction. At the guide ( 25 ) is also the one with a suitable engine ( 16 ) equipped drive ( 15 ) arranged. The motor ( 16 ) is eg an electric motor. But it can also be any other electrically or otherwise operated actuator. For example, the engine ( 16 ) also be an activated by the trigger mentioned above electromagnet or a magnetically released spring.

The motor ( 16 ) acts via a transformer ( 17 ) to one or more control elements ( 18 ) one. In the illustrated embodiment, the transformer ( 17 ) designed as a linkage, the two handlebars ( 17 ), which on the one hand pivoted on a rotary disk on the motor shaft and at the other end with a plunger-like adjusting element ( 18 ) are rotatably connected. By turning up to about 90 ° of the engine ( 16 ), the handlebars ( 17 ) in an extended position with axial alignment in the guide ( 25 ), in which the spring-loaded plungers ( 18 ) from the leadership ( 25 ) axially and in engagement with the recordings ( 20 ) on the inhibiting element ( 19 ) bring. By an opposite rotational movement of the engine ( 16 ), the handlebars ( 17 ) and the plungers ( 18 ) again in the in 2 shown starting position are pulled back. The pestles ( 18 ) may be formed in several parts in the manner shown. You can also interact with a sanding track ( 22 ) have friction-like front ends.

Modifications of the embodiments shown are possible in various ways. On the one hand, this concerns the number and arrangement of the castor wheels (FIG. 5 . 6 ). Instead of the arrangement shown, the safety device ( 2 ) only one caster ( 5 . 6 ). Alternatively, it can be attached to the front and rear of the trolley ( 1 ) each influence and inhibit a castor. Furthermore, the design of the drive ( 15 ) and the control elements ( 18 ) vary as desired. In addition, a kinematic reversal is possible, wherein the control elements ( 18 ) on the inhibitor or elements ( 19 ) are arranged and activated by a suitable device, such as an electromagnet, in the inhibition position and thereby positively and / or non-positively with a corresponding receptacle on the guide ( 25 ) engage. Also variable is the structural design of the castors ( 5 . 6 ) and their parts. The arrangement and design of the inhibiting elements ( 19 ) and their recordings ( 20 ) can be changed. The design features shown in the drawings and in various embodiments can be interchanged and combined as desired.

1

Dolly, Shopping venture

2

Safety device antitheft

3

frame

4

crossmember

5

caster

6

caster

7

role

8th

roll holder

9

pivot bearing

10

swivel axis

11

fitting

12

Receiving area bearing head

13

deflector

14

takeaway

15

drive

16

engine

17

Exchanger, link mechanism

18

Control, tappet

19

inhibiting member

20

admission

21

drilling

22

Sliding track

23

friction lining

24

cam track

25

guide

Claims (15)

Dolly with a frame ( 3 ) and several pivoting casters ( 5 . 6 ), which has a receiving area ( 12 ) for a deflector ring ( 13 ), characterized in that the trolley ( 1 ) a controllable safety device ( 2 ) for inhibiting the pivoting movement of at least one caster ( 5 . 6 ), wherein the safety device ( 2 ) a drive ( 15 ) and one or more driven actuators ( 18 ) which is in contact with a 12 ) arranged inhibiting element ( 19 ) interact. Trolley according to claim 1, characterized in that the deflector ring ( 13 ) as an inhibiting element ( 19 ) is trained. Trolley according to claim 1, characterized in that the deflector ring ( 13 ) by an inhibiting element ( 19 ) is replaced. A trolley according to claim 1, characterized in that on the inhibiting element ( 19 ) a deflector ring ( 13 ) is rotatably arranged. Trolley according to one of the preceding claims, characterized in that the inhibiting element ( 19 ) with the swivel caster ( 5 . 6 ) connected is. Trolley according to one of the preceding claims, characterized in that the inhibiting element ( 19 ) a driver ( 14 ) which positively and / or non-positively with a roll holder ( 8th ) connected is. Trolley according to one of the preceding claims, characterized in that the inhibiting element ( 19 ) at least one recording ( 20 ) for an actuator ( 18 ) having. Trolley according to one of the preceding claims, characterized in that the Inhibiting element ( 19 ) several images distributed around its circumference ( 20 ) for an actuator ( 18 ) having. Trolley according to one of the preceding claims, characterized in that the receptacle ( 20 ) as a bore ( 21 ) for a plunger-like actuating element ( 18 ) is trained. Trolley according to one of claims 1 to 8, characterized in that the receptacle ( 20 ) as a sanding track ( 22 ) for a friction-type actuating element ( 18 ) is trained. Trolley according to claim 10, characterized in that at the sliding track ( 22 ) a friction lining ( 23 ) is arranged. Transport trolley according to claim 10, characterized in that the grinding track ( 22 ) a curved path ( 24 ) with variable depth. Trolley according to one of the preceding claims, characterized in that the drive ( 15 ) an electric motor ( 16 ) and a transformer ( 17 ), preferably a linkage, for connection to the linear guided actuators ( 18 ) having. Trolley according to one of the preceding claims, characterized in that on the frame ( 3 ) between the casters ( 5 . 6 ) a transverse guide ( 25 ) for the control elements ( 18 ) and the drive ( 15 ) is arranged and supported. Transport cart according to one of the preceding claims, characterized in that the securing device ( 2 ) on the front casters ( 5 . 6 ) is arranged.