DE3033732A1 - DETECTABLE STEERING WHEEL FOR MOVABLE DEVICES, e.g. WASTE CONTAINER OR THE LIKE - Google Patents

Description

PATENT AGENCIES ^ --- DIPL-PHYS. H, STURiES 0 _{) f]} 0.0 _{) 7}

DI PL.-1 NG. P. EIGHLER ^V ~

BRAHMSSTRASSE 29, 5600 WUPPERTAL 2

Berthold Hausseis, era Krupin 15, 5678 Wermelskirchen-Tente

Lockable swivel castor for mobile devices, e.g. rubbish bins ο. like ...

The invention relates to a lockable Castor for mobile devices, e.g. garbage cans or the like., rait a swivel bearing pot to be attached to the underside of the device and a pivoted steering fork connected to it, supported by ball bearing rims, which carries a roller wheel fitted with tires as well as a brake body which is used to lock it against rotation, the one with its brake shoe by a located in the pivot axis and by means of one on the pivot bearing pot

ORIGINAL INSPECTED

arranged actuating lever axially displaceable against spring pressure The adjusting bolt must be pressed against the wheel.

With known lockable castors of the above type, e.g. according to DE-OS 27 49 568, but also with others Lerik rollers of a comparable design are housed in the steering fork cavity and as a leaf spring or simpler Swivel lever designed brake body arranged above the roller wheel and running in the direction of travel, with the adjusting bolt in its firing position more or less firmly from above against the circumference of the Roller wheel or its tires is printed. In order to ensure a permanently good braking of the roller wheel reach, it is because of the ongoing wear and tear of the tire, which is mostly made of rubber or caoutchouc necessary to provide an adjustment option for the brake. For this purpose, either the adjusting bolt is on its lower end is provided with an adjustable adjusting head or the brake lever is constructed in several parts and provided with a correspondingly adjustable, e.g. screw-adjustable brake shoe. That requires not only a corresponding additional structural effort, but is also disadvantageous insofar as the readjustment the wheel braking associated with difficulties because of the concealed, difficult-to-access arrangement of the adjustment means is and is therefore not infrequently completely omitted. This then leads to insufficient wheel braking and the resulting braking accident risk.

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To get away from the disadvantageous power requirement, it is with a non-generic swivel castor the US-PS 30 02 589 known to Radbremsunq in the riding cheeks of the steering fork axially parallel to the roller wheel axis, Use flattened brake bolts that are worked into the wheel disc body with all around distributed extensions provided, ring-shaped brake groove protrude and through each outside of the steering fork side cheeks located, hydraulically operated brake arms are to be rotated in such a way that they are by Ouerstellen Block the roller wheel in one of the brake groove extensions. Apart from the fact that this is only one Blocking of the roller wheel in individual, the number of Braking groove extensions corresponding rotary positions is possible, this wheel blocking also requires a considerable structural effort, with the fact that due to the external arrangement of the brake control arm on the steering fork Appearance of the swivel castor is significantly impaired and, moreover, there is an increased risk of pinching and contamination.

The invention is based on the object of providing a lockable swivel castor of the type mentioned at the beginning create which, with a simple structure, enables a wheel braking that is always effective and possible in every rotational position of the wheel without the need for a brake readjustment is. This object is achieved according to the invention in that the brake body than around one in the running direction of the roller.

BATH ORIGINAL

wheel eccentrically extending axis pivotably mounted, multiple angled brake lever formed is, which crosses the roller wheel circumference freely, overlapping and whose brake shoe lies on the side of the roller wheel opposite its pivot axis. In this way you come to a swivel castor in which the castor wheel is not attached to the wheel circumference as before, but instead by the brake lever the wheel side wall, in particular on the tire side. This remains the same with increasing operating time Wear on the tire circumference has no effect on the effectiveness of the wheel brake, which means that there is no adjustment whatsoever requirement.

To ensure even wheel braking on both sides, are advantageous two symmetrically opposite with regard to the common adjusting bolt and the roller wheel, corresponding angled brake levers are provided, which cross each other like scissors at the level of the roller wheel circumference and with the brake shoes present at their angled free ends grip the tires of the roller wheel like pliers. When the adjusting bolt is actuated accordingly, both opposing brake shoes grip the Sidewalls of the tire, whereby a proper braking of the roller wheel in each of its rotational positions even after a sufficiently long period of operation without any readjustment work can be achieved.

The upper ends of the Brr.mn lever crossing there advantageously have horizontally extending bends, on the inner edges of which the common adjusting bolt engages, while the Breras lever pivot bearing means are located on the outer edges. In the simplest way, these can consist of one tongues present on the outer edges of the horizontal angles of the brake levers, which are located in corresponding recesses in the steering fork side wall
to store. The crossing brake levers can expediently also be mounted in a bearing bush fastened in the steering fork cavity, whereby the adjustment path of the brake shoes is correspondingly increased with the same adjustment stroke of the adjusting bolt. This allows anything
Avoid dragging the brake shoes in the release position of the adjusting bolt.

Finally, the invention also provides that in the swivel bearing pot for swivel locking of the steering fork an externally toothed locking disk connected to its back via a connecting bush surrounding the adjusting bolt in a rotationally fixed manner
and one with in theirs. Tooth gaps retractable locking bolt provided, on the adjusting bolt axially immovable "attached locking plate is present, which is provided with the pivot bearing pot wall penetrating, with the actuating lever in engagement actuating tabs
and is covered by a spring washer which presses on the locking pin heads and which is located on the outside of the pivot bearing pot

BATH ORIGINAL

is supported and connected inside with the locking bolt that it seeks to hold in the release position. This ensures a secure swiveling fixation of the steering fork simultaneous braking of the roller wheel is achieved even if the gaps between the teeth on the locking disc do not match align with the locking pin of the locking plate above, as the locking pin is then initially on the teeth of the locking disc Sit on and secure when the steering fork is then swiveled slightly through the spring washer be pressed into the then aligned tooth gaps. The spring washer is advantageously located on its outer circumference existing support tabs in the inner edge of the swivel bearing pot existing crankings and is inside provided with a keyhole-like recess through which you can access the upper, button-like end of the Adjusting bolt is to be pushed laterally. That makes one simple design and extremely convenient mounting option.

In the drawing, two exemplary embodiments are shown according to the invention Procured castors shown. It shows

Fig. 1 shows a first embodiment of the new swivel castor in partially sectioned front view,

FIG. 2 shows the side view belonging to FIG. 1, FIG. 3 shows a plan view of the steering roller and

BATH ORIGINAL

Fig. 4 shows the second embodiment of the castor in partially sectioned front view of the steering fork and its brake lever.

The lockable shown in Figs The swivel castor has one on the underside of the device, for example on a garbage can via the screw fastening holes 1 to be attached thick-walled swivel bearing pot 2, which has a downward arched bottom 2 '. With this swivel bearing pot 2 is the steering fork which carries the roller wheel 4, which is provided with rubber tires 3 5 pivotally connected. For this purpose, with the steering fork back 5 'via the one central opening 2' '' in the bottom of the swivel bearing pot 2 * freely penetrating connection bushing 6 secures the upper ball bearing shell 7 located in the swivel bearing pot connected, which is supported via the upper ball ring 8 on the pivot bearing pot base 2 '. Between the latter and the steering fork back 5 'is another ball ring 9 available as a support pivot bearing.

The upper ball bearing shell 7 also serves as a locking disk for the swivel locking of the steering fork 5 and is for this purpose provided with a corresponding external toothing 7 ″. In the connecting bush 6 is the adjusting bolt 10 axially inadvertently mounted .. Its upper end is button-like, namely with a neck 10 ' and a flat head 1.0 ". On. the adjusting bolt

ORIGINALINSPECTED

Neck 10 'supports the with a corresponding central Blocking plate 11 provided with a bore, which penetrates with corresponding slots .2 '' in the wall of the pivot bearing pot Actuating tab 11 'is provided. Their ends engage in correspondingly located recesses of two on the pivot bearing pot 2 at the points 12 articulated and along the inner edge of the pivot bearing pot 2 extending operating lever 13, at the freely movable ends of which a common foot-operated lever 15 via the hinge pin 14 is hinged. This lever 15 engages around the ends of the two actuating levers 13 in the shape of a fork and lies with them its correspondingly raised fork cheeks 15 'on the underside of the pivot bearing pot 2. In the locking plate 11, two locking bolts 16 are still supported in corresponding bores, with their heads 16 * on rest on the locking plate and with the external toothing 7 'present on the locking disc 7 below work together in a descriptive manner.

Above the locking plate 11, a spring washer 17 is arranged, which is also present on its outer circumference Support tabs 17 'in on the inner edge of the pivot bearing pot

IV
existing crankings 2 and is provided on the inside with a keyhole-like recess 17 ", via which it can be pushed laterally onto the upper, button-like end 10 ', 10" of the adjusting bolt 1.0. The spring washer 17 is at the same time on the heads 16' of the lock -

bolt 16, which you can find in the Pig. 1 seeks to keep the position shown in the locking plate 11.

To brake the roller wheel 4 are used in the steering fork 5 pivotably mounted, multiple angled brake lever 20, 20 ', which is at the level of Cross the roller wheel circumference like scissors and with brake shoes 21 at their angled free ends, 21 'grip around the tires 3 of the roller wheel 4 like pliers. The brake levers 20, 20 'have horizontal at their upper ends extending bends 22, 22 ', on the inner edges of which here with a corresponding constriction 10 '' 'provided common adjusting bolt 10 engages and on the outer edges of the brake lever pivot bearing means are located. These consist of the horizontal bends 22, 22 'of the brake levers 20, 20 " Insertion tongues 23, 23 'which are stored in corresponding recesses 24 and 24 "in the steering fork side wall. The two crossing brake levers 20, 20 'are thus around the axes S thus formed and running eccentrically in the running direction of the roller wheel 4 (see Fig. 2) pivotally mounted.

In the release position shown in FIGS of the locking mechanism, the steering fork 5 is freely pivotable and the roller wheel 4 is freely rotatable. To the When the castor is locked, the foot control lever is pressed down, whereby the inner lever ends 15 '

Support on the pivot bearing pot 2 and thereby pivot the actuating lever 13 downwards. As a result, the locking plate 11 and with it the adjusting bolt 10 and the spring washer 17 are pressed downwards. The locking bolts either immediately move into the corresponding tooth gaps 7 · ^{1 of} the locking disk 7 or they first touch the locking teeth 7 'in order to move the steering fork 5 and the locking disk 7, which is connected to it, into the tooth gaps 7 ^{11 with the slightest subsequent pivoting movement} reach. This is ensured by the spring washer 17 pressing on the heads 16 'of the locking bolts. At the same time as the downward movement of the adjusting bolt 10, it also swivels the crossing brake levers 20, 20', which thereby firmly against the tire sides 3 ^{1 with their opposing brake shoes 21, 21 '} Press and thus fix the roller wheel 4 accordingly. Since there is practically no wear and tear on the side walls 3 ′ of the wheel tire 3, this always results in effective braking of the roller wheel without the brake levers 20, 20 ′ having to be readjusted. If the castor lock is to be canceled again, the foot control lever 15 only needs to be swiveled back upwards. As a result, the lever ends 15 'slide from the underside of the swivel bearing pot 2, whereby the spring washer 17, the actuating lever 1.3 and the adjusting bolt 10 and over in the latter

the locking plate 11 also lifts into the release position. As a result, the locking pins 16 move out of the tooth gaps 7 ^{11 of} the locking disk 7, whereby the pivot lock is released. At the same time, the lifting movement of the adjusting bolt 10 moves the brake levers 20, 20 'into their release position in which the brake shoes 21, 21 "lift off the tire.

The embodiment shown in Fig. 4 differs essentially only differs from the previously described one in that the two crossed brake levers here 20, 20 'not directly in the side cheeks of the steering fork 5 but in one in the steering fork cavity attached bearing bush 25 are stored, which in a suitable manner, for example via through bolts or the like., On the Steering fork 5 is attached. In this case, too, the brake levers are in corresponding manner via simple plug-in tongues 23, 23 ' Recesses 26, 26 'of the bearing bush with sufficient swivel movement play through in the direction of travel of the roller wheel 4 eccentrically extending axes S pivotable. As a result of the different leverage ratios can here the brake levers 20, 20 'with the same adjustment stroke of the adjusting bolt 10 correspondingly larger movement strokes perform, so that even with a relatively small adjustment stroke of the adjusting bolt 10, the brake shoes 21, 21 'can be lifted off the tire sides 3' with certainty or pressed firmly onto them.

Various modifications are possible within the scope of the present invention. So the brake levers 20, 20 ' for example, be angled only in an L-shape, based on the one in the Pig. I and 4 shown Front view, where they then only cross at the level of the adjusting bolt 10.

L e r s e i t e

Claims (7)

Patent Attorneys 0Β-ΙΜβ · ° 'P1-PHYS · «· ·!« «» 30 3 3 7 3 DIPL.-ING. P. EICHLER BRAHMSSTRASSE 29, 5600 WUPPERTAL 2 1. Lockable swivel castor for mobile devices, e.g. rubbish bins or the like, with one on the device filter side to be fastened swivel bearing pot and a pivotably connected to it, about Steering fork supported by Kügellaqerkräze, the roller wheel fitted with tires and a to its rotational lock serving brake body carries, which with his brake shoe by one in the Pivot axis located and by means of an operating lever present on the pivot bearing pot against Spring pressure axially displaceable adjusting bolt is to be pressed against the wheel, thereby marked ei c h η e t that the brake body as an in Running direction of the roller wheel (4) eccentric axis (S) pivotably mounted, multiple angled brake lever (20) is formed, which freely spans the roller wheel circumference crosses and its brake shoe (21) on the opposite side of its pivot axis (S) Roller wheel (4) lies. ORIGINAL WSPECTED 2. Lockable swivel castor according to claim 1, characterized in that two with respect to the common adjusting bolt (10) and the roller wheel (4) symmetrically opposite, correspondingly angled brake levers (20, 20 ') are provided, which scissors-like at the height of the roller wheel circumference cross and with the brake shoes (21, 21 ') present at their angled free ends, the Grip around the tires (3) of the roller wheel (4) like pliers. 3. Lockable swivel castor according to claims 1 and 2, characterized in that the upper ends of the crossing brake levers (20, 20 ') have horizontally extending bends (22, 22'), on the inner edges of which the common adjusting bolt (10) engages and on the outer edges of the brake lever pivot bearing means are located. 4. Lockable swivel castor according to claim 3, characterized in that the pivot bearing means from the brake levers (20, 20 ') present on the outer edges of the horizontal bends (22, 22') Insert tongues (23, 23 ') exist in corresponding recesses (24, 24') in the Store the steering fork side wall. ORIGINAL INSPECTED 5. Lockable swivel castor according to claims 1 to 4, characterized in that the crossing brake levers (20, 20 ') in one bearing bush fixed in the steering fork cavity (25) are stored. . . 6. Lockable swivel castor according to one of the claims 1 to 5, characterized in that the swivel bearing cup (2) for pivotal determining the steering fork (5) via a the adjusting bolt (10) surrounding with its back (5 ¹⁾ connecting sleeve (6) rotatably connected externally toothed locking disc (7) and a provided with retractable in their tooth gaps (7 ¹¹⁾ locking pin (16) on the locking bolt (10) axially immovable locking plate (11) is provided, which is provided with the pivot bearing pot wall penetrating, with the actuating lever (13) in engagement with the actuating flap (II ¹ ) and is covered by a spring washer (17) which presses on the locking bolt heads (16 ') and which is on the outside of the pivot bearing pot (2) is supported and internally connected to the adjusting bolt (10), which it seeks to keep in the release position. 7. Lockable swivel castor according to claim 6, characterized marked that the spring washer "(1.7) with existing support on their outer circumference flap (17 ¹ ) rests in the crankings (2) present on the inner edge of the swivel bearing pot (2) and is provided with a keyhole-like recess (17 '') on the inside, through which it is attached to the upper, button-like end (10 *) of the adjusting bolt ( 10) is to be pushed on to the side.