DE1900743U - ROLLER WITH LOCKING DEVICE TO BLOCK THE ROTATION AND / OR PIVOTING MOVEMENT OF THE IMPELLER. - Google Patents

Description

Ii reel with locking device to block the Rotary movement and / or swivel movement of the impeller »

The invention relates to a castor with a locking device for blocking the rotary movement and / or swiveling = movement of the running wheel »Preferably, it is a swivel castor in which the locking device is used to block both the rotary motion and the swiveling movement of the running wheel and is used in particular for Hospital »and doctor's furniture _s 2» Bo hospital beds and equipment cabinets, usable isto.

Castors with locking devices for locking the steering fork and wheel are known in various designs. In general, to block the pivoting and rotating movement of _{the wheel, a pawl articulated in the cavity of the wheel fork is provided 9} which can be pressed against the wheel and its rotational movement hemmtj, and which can be brought on the other hand with a Terzahnung the roller bracket into engagement and thereby ο locks the Yerschwenkbarkeit the swiveling roller bracket and hence the supported therein impeller can for this purpose at Lenfcrollen which are means found a suitable operating mechanism by eccentric or wedge _s Caster holder an s »B, the steering

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Rollesi fastening pin through the blocking bolt, which has a toothing at its lower end and can be brought into engagement with the pawl pivotably mounted in the fork _9, which generally has a corresponding counter-toothing for this purpose, as shown by the Utility model documents 1 76Ό 345 and 1 808 047 is known »

If - a single _{blocking of the castors is sufficient 9} they are usually equipped with a locking _lever} which can be tightened with the tip of the foot and then released Bracing of the wheel with the rotatable rope of the fork by toggle levers?

Deflection levers or pull wedges in the form of mudguards require a large number of individual parts _5, which makes the role considerably more expensive "In addition, the locking mechanism has to be readjusted repeatedly with increasing wear, especially of the impeller, which I can rarely do by laypeople without the help of skilled workers."

To avoid these laughable parts, a particularly simple swivel castor with regard to the locking of the swivel and rotary movement has already been proposed, in which the locking device consists of a minimum of individual parts, which causes a safe blocking of the swivel and rotary movement and no loading position even after prolonged use and wheel wear makes necessary = For this purpose, an expansion body or expansion wedge or a wedge-shaped bent spring clip is arranged in the cavity of the roller fork _? which is spread apart by a spreader toggle and pressed on the one hand against the running surface of the impeller and on the other hand against a toothing of the roller bracket

j where the Spreiakixebel is expediently designed as a foot actuation love = it is known ₉ to store the Spreissgebel in a leaf spring clip in such a way that the angled leaf-shaped spring handles enclose the Spreisknebel with a powerful spring preload and furthermore bast places for the locking of the Spreissknebel's in his Tightened position and in its loose position., For this purpose, the expansion toggle can have a Spreissohwinge.aufwinge as an expanding organ, which consists for example of a small tiltable plate, which is mounted with its lower edge in a joint socket formed by the lower leaf fiber handle and with an upper rabbit ₉ engages in a guide slot arranged in the upper leaf spring leg, which engages the pivoting movement of FIG. 3B. plate-shaped spreading rocker, as is known from utility model specification 1 842 465 ₀

In this known construction, which consists of only a few individual parts and in which the expansion toggle is mounted in the expansion body and is movable with it ₉ , the disadvantage is that the locking mechanism solilifts during the process on the impeller and also causes noises after wear ₅ especially when the Spreizknebel is formed as Fußbetätigungshebel, the weight of the expander permanently against the Badbereifung presses "Besides, there is a risk ₉ that is besehädigt in a violent songs contact of Fußbetätigungsliebels the tires of the impeller" Ss has therefore already been proposed to "the Spreizschwinge on an axis or with the aid a hoe in the fork housing so that the locking mechanism no longer grinds on the wheel tires during the process and the clamping pressure exerted on the spreader arm with the expansion toggle is transmitted through the pivot axis into the fork housing wall and as a result

Jö sea die. Badbereif.ung is scnonted ₉ as is known from the utility _{model specification 1 887 886 or similar}

The known lock constructions have several disadvantages ο A very important disadvantage is _s that drive to re-release the tensioned locking device with the Fußspitae among Eußbetätigungshebel and then ate lußbetätigungshebel must lift the foot ₅ which particularly lightweight women's footwear damage suffered ρ especially if the Fußbetätigungshebel for blocking the roller had been kicked down hard. There are awar castors with a rocker-like foot actuation device known, but these known devices either do not guarantee a safe blocking ₉ or the ihzßbetätwippe is arranged on the side of the roller and thus harbors the risk of getting stuck "or even sound ankle injuries for the operators o Another important one The disadvantage is that with swivel castors the foot control lever regularly points in the direction of travel during and after the process, so that it cannot be operated on the side from which the hospital bed or device is pushed and the operator can block the swivel castor with the The foot has to reach around the device or bed post and it is difficult to block the swivel castor Acting foot control lever is damaged * It is already known to wedge a lateral foot control lever on a pin protruding laterally through the fork housing in such a way that when the swivel castor is unblocked it protrudes backwards opposite to the direction of travel _s, however, such a lateral control lever is in many Cases too bulky and. dangerous for the operator »

The invention eliminates these disadvantages and provides a roller, in particular a steering roller, whose IFeststelleinricii device is particularly simple and can be operated in a particularly convenient manner.

The invention is initially based on the not previously known idea s, in the case of a castor or swivel castor equipped with a blocking member - which therefore has a locking device for blocking the rotational movement and / or the pivoting movement of the running wheel xm.ö. in which a blocking member is arranged in a known manner in the cavity of the caster fork5, which can be actuated by a foot switch and, for example, by spreading leaf springs on the wheel and / or a toothing of the caster holder can have a blocking effect - the blocking organ through the foot switch Mediation of a push rod stored in the fork cavity to be operated »By means of the push rod drive j, namely by interposing a horizontally movable push rod, for example, between the foot control lever and the spreader 5, you are free with regard to the direction of the foot control lever and can use this, for example, on castors against the direction of travel Arrange above the impeller, so the unblocking of the pest control no longer needs to be done by lifting the foot switch lever with the tip of your foot, rather both the blocking and releasing of the locking device can be done by stepping down the foot movement can be made ο

Such a locking device requires because of the difficult accommodation in the cavity of the caster fork Legs of individual parts, making such castors and in particular Castors are usually only suitable for more demanding use cases- The invention simplifies the Locking device of the roller and thus considerably expands its field of application, since it has rollers configured in this way and makes swivel castors much cheaper and generally usable »

The new roller, which is preferably a steering roller and which has a locking device to block the rotational movement and / or the pivoting movement of the wheel; a foot switch can be actuated and can have a blocking effect on the wheel and / or a toothing of the roller holder _? according to the invention is characterized by a pawl ₉ which blocks the push rod snap in their .Blockierungsstellung and which can be disengaged for re-release of the push rod and thus unblocking the locking device by foot pressure again "This need su be provided on the actual blocking member, a complicated Selbsthemmmeohanismus and the blocking member not to be designed sum rotating indexing, rather the blocking element can be, for example, a simple loose spreader plate, which is brought into its blocking position by the push rod and then held in this blocking position by the push rod locked by the pawl _o The important parts of the actuation mechanism are light accessible, the production is simplified and cheaper, and there is, among other things, the advantage that now the high stress exposed TeUe ₁ , namely the Schubsta nge and the expansion element as well as the pawl, made of special material and, for example, made of steel and, if necessary, can be hardened _β

The pawl is useful as a bilateral lever ge = · forms, which is pivotably mounted in or on the roller fork by means of an axis and with its locking lug designed

formed a lever arm that locks the push rod in its blocking position ₉ and that can be disengaged again to release the push rod and thereby expose the locking device by pressing the other lever arm, which is designed as a foot-operated lever »

In a preferred embodiment of the invention, a bearing body is arranged in the cavity of the Laufrollega.be 1, in which the push rod actuatable by the foot switch lever is slidably mounted and. on which the footshift lever is articulated by means of an axle, with the bilateral ratchet lever being pivotably arranged on this axle at the same time, one lever arm of which is designed as a locking lug ₉ which, when the push rod is in the blocking position, engages in a bore of the same and thereby the push rod locks, while the other lever arm is designed as a foot control lever and can be stepped down with the foot to release the push rod and thus unblock the locking device «

The one provides its application of such supplementary features. each with individual advantages. With castors and particularly castors however have the special feature that, Video- achieved special combination effects by the simultaneous application of several measures, interlocking their effects, even if it is only in that in addition to a ^one particularly simple possibility of producing a particularly easy mounting and The possibility of handling the locking device as well as the special technical design results in a particularly pleasing appearance, because this is largely what matters for castors and thus the purpose of use and the sale of the castors is significantly increased =,

Such a combinati ons effect results in a roller and in particular in a steering roller by a development of the invention, which is characterized in that a bearing body is arranged in the cavity of the roller fork ₅ to which two leaf springs are attached and to which the pedal is articulated by means of an axis and in which can be actuated by the pedal push rod is mounted horizontally slidable, the lower leaf spring is shaped as a cup bearing and the upper leaf spring has a longitudinal slot and between the leaf spring · the loose spreader _s is arranged is mounted with its Unterlcaate in the leaf spring socket bearing and is guided with an upper plate nose in the Blattfedersehlits is -and the form of loose iron the leaf springs held 'part by means of the push rod in its blocking position ver pivotable ρ and at the same time on the bearing shaft of the shift pedal, a spring-loaded s standing two-sided ratchet love is pivotably mounted, one lever arm of which is designed as a downward-facing locking nose which engages in a hole in the push rod when the push rod is in the blocking position and thereby locks the push rod _? while the other lever arm is designed as a foot-operated lever ₉ which can be kicked down to release the push rod again and thereby unblock the locking device »

Bediexiu & gsmäßige and aiontagemäßige and functional advantages are obtained when the pedal is made fork-shaped at its bearing end and the ratchet lever between the fork legs on the same pivot axis of the Fußschal thebels stored """is" It is advantageous and _s when the pawl lift 1 in the manner It has also proven to be beneficial if the actuation surfaces for locking and releasing, namely the step surface of the control lever and the foot actuation arm of the pawl lever, are designed differently. For this purpose, a Step button _s namely a head-like elevation ^ be provided «, which protrudes over the foot switch and differs from this in Ιογίβ and Z = B. auola in a colored casing.

Further details and special features of the invention result can be derived from the following explanation of the exemplary embodiments of the invention shown schematically in the drawings

l is a Yertical sc & nitt by an inventive Swivel castor in a totally blocked state »

S ¹ Ig ο2 seigt the castor of Fig _o 1 in plan views

Pig »3 illustrates a variant of the swivel castor Fig. 1p in which the spreia serving as a blocking organ plate is kept in contact with the push rod by means of an elongated hole guide «

4 Clearly another variant of the embodiment on the swivel castor of Fig _{. 1?} in which the spreader bar serving as a blocking element is mounted in a leaf spring clip acting on the same side as a counterpressure ceder =

Figο5 illustrates another variant on the swivel castor of the I ¹ Xg »1, in which the splitting plate serving as a blocking organ is a toggle-like gel end plate»

The roller housing consists of the roller fork 6 holding the wheel 1 and the lexical roller back bearing ₉ which is composed of the outer spherical shell 7 and the inner spherical shell 8 and the spherical balls 9

In the cavity 3 of the castor fork 6 of the impeller 1 is arranged a special unit for locking the swiveling and rotational movement "This includes a bearing body 2, which is arranged together with above and below the bearing body 2 leaf springs 11a and 11b _s in the execution

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Variant of Fig are "4 fused into a unitary leaf spring bracket 11 _s at bending 6a of the swiveling roller bracket 6 is attached with Meten * The Lagerlcörper 2 is _s formed at its from the Gabelliöhlung 5 outwardly projecting end as a fork in the joint by means of a rotation axis 26 a Foot switch lever 4 and a pawl lever 25 are mounted »In the longitudinal direction of the eagle body 2 a channel is provided for the purpose of receiving and guiding a push rod 21 which can slide horizontally back and forth in the bearing body 2. The horizontal movement of the push rod 2 is limited to the outside by an actuating cam 4a of the foot release lever 4 and to the inside by a spreader bar ₉ which acts as a blocking element for locking the pivoting and rotating movement of the impeller 1 »The spreader plate 5 is between the upper leaf spring 11a and the The lower leaf spring 11b is clamped and held by these under all tension in which the spreader plate 15 is guided with an upper leash 17 = by the action of the push rod 21 on the spreader plate 15, the latter can be tilted into its blocking position (FIG. 1) Leaf spring 11a by means of an angled bast strip 14 in the Yerzahn 8a of the inner spherical shell 8 of the roller holder 10 engages and thus blocks the visual pivoting ability of the impeller 1; while the lower leaf spring 11b is supported against the tires 1a of the impeller 1 and thereby blocks the rotation capacity of the impeller »

The pawl lever 25 is in the _{illustrated embodiments a curved angle lever s} which is pivotably mounted on the bearing axis 26 of the Fußschalthebeis 4 and under the action of a compression spring 22 is _P which the locking arm 25a of the

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The ratchet lever 25 is constantly in contact with the push rod 21 ο This lever arm 25a is at its free one. End as downwardly facing Sperraase 27 formed _s which can snap into a bore 28 of the push rod 21 ₉ when the push rod has moved 21 by depressing the shift pedal 4, the Spreiaplatte 15 in their Bloekierungsstellung ο laughing for the automatic locking of the locking lug 27 in the Schubstangenbohrung28 remains the push rod in This blocking position locked «The other outward facing arm 25b of the pawl lever 25 is designed as a foot actuation lever and in the illustrated embodiments has a button in the form of a button-like elevation 29» For releasing the locked push rod 21 and thereby unblocking the pest control device and thus the steering roller Foot actuation arm 25b of the ratchet lever stepped down with the foot, "

Me! Locking device according to the invention works with the in the drawings shown as exemplary embodiments swivel castors as follows?

This is pressed with sides NEN Betätigungsnock'en 4a against the push rod 21 by a kick to the shift lever 4 _t which is housed horizontally displaceable in the bearing part 2 »The push rod 21 acts in turn on the Spreiaplatte 15 is a ₉ by the two leaf springs 11a and 11b are spread apart »The upper leaf spring 11a is pressed against the teeth 8a of the inner ball socket 8 belonging to the roller bracket 10 and thus .the bridge bearing of the steering roller is determined; At the same time, the locking lug 27 of the ratchet lever 25 engages in the recess 28 of the push rod 21 ₀ This locks the push rod 21 and thus also the locking plate 15 in this blocking position ₅ whereby the swiveling and driving ability of the castor are totally blocked remain"

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By stepping on the step button 29 of the pawl «.- = · hebeis 25j in which not only the friction between the locking lug 27 and the push rod 21 but also the holding force of the compression spring 22 is overcome ₉ , the push rod 21 is released again and horizontally movable by the the leaf springs 11 on the spreader bar 15 exerted spring force? which in the variant of KLg ₀ 4 is reinforced by the spring bow 11g and in the variant of Fig = 5 is promoted by the design as a hinge plate? the push rod 21 is moved back into its starting position gurüek.

-Me push rod 21 presses against the actuating cam 4a of the push-button lever 4 and lifts the push-button lever 4 back into its starting position ₉ , the pawl lever 25 with its compression spring 22 dipping into a recess 4c of the Jußschalt- = hebeis 4 and beautifully enclosed by the push-button 4 ο

Claims (1)

- 13-vision protection claims 1 ο caster with locking device sum blocking the rotary movement and / or pivoting movement of _{the running wheel 9} in which a blocking element is arranged in the cavity of the caster fork »which can be actuated by means of a push rod mounted in the fork cavity by a foot switch lever and on the running wheel and / or a can act gearing of the roller support blocking "gekennseiehnet by a pawl (25) _s which blocks the push rod (21 snap in their blocking position and which can be disengaged again by foot pressure to Wiederfreigs.be the push rod (21) and deblocking the detecting device!. 2 ₀ caster with locking device sum blocking the rotary movement and / or pivoting movement of the impeller ₉ in which a blocking element is arranged in the cavity of the caster fork _? which can be actuated by a foot shift lever with the intermediary of a push rod mounted in the fork cavity and can have a blocking effect on the wheel and / or a toothing of the roller holder, characterized by a pawl (25) shaped as a two-sided lever, which is in or on the roller fork (6) is pivotally mounted by means of an axis (26) and with its lever arm (25a) designed as a locking lug (27) locks the push rod (21) in its bioekierungsstellung ₉ and releasing the push rod (21) and unblocking the locking device by pressure the other lever arm (25b) designed as a FuSbetätiguiigsiiebel can be disengaged again 14th J ₀ castor with locking device to block the turning and / or swiveling movement of the wheel _? in which a blocking member is arranged in the cavity of the caster fork, which can be actuated by a foot switch with the help of a push rod mounted in the fork ™ cavity and can have a blocking effect on the impeller and / or a toothing of the caster holder, characterized in that in the cavity (3) a bearing body (2) is arranged on the roller fork (6) _? in which the push rod (21) actuatable by the foot switch lever (4) is slidably mounted and on which the foot switch lever (4) is articulated by means of an axis (26), on which a bilateral pawl lever (2 5) is pivotably mounted on the same side, one lever arm (25a) of which is designed as a locking lug (2?) which engages in the blocking pitch of the push rod (21) in a bore (28) of the push rod (21) and locks the push rod (21), and its other lever arm (25b) is designed as a foot actuation lever ₉ which can only be trodden down with the foot to release the push rod (21) and unblock the locking device « 4 »Roller nacö. one of claims 1 to 5, characterized ₉ da.B is the Biockierungsorgan a spreading body (15] ₅ in a pair of leaf springs (11) is loosely mounted and can be tilted by the push rod (2T) into its blocking position and the locked push rod ( 21) is held in its blocking position. - 15 - 5o roller with locking device to block the Rotary movement and / or pivoting movement of the impeller, at which has a blocking element in the cavity of the roller fork is arranged, the intermediary of one in the fork cavity supported push rod by a foot switch can be actuated and can have a blocking effect on the running wheel and / or a toothing of the running roller holder, characterized in that a bearing body (2) is arranged in the cavity (3) of the running roller fork (6), on which two leaf-'10 springs (11a , 11b) are attached and on which the footshift lever (4) 'is articulated by means of an axle (26) and in which the push rod (21) actuatable through the footshift lever (4) is mounted so that it can slide horizontally, the lower leaf spring (Hb ) is shaped as a socket bearing (.16) ". and the upper leaf spring (11a) has a longitudinal slot (19) and a loose splice plate (15) is arranged between the leaf springs (11), which with its lower edge (15b ) is mounted in the leaf spring socket bearing (16) and is guided with an upper plate nose (1?) in the leaf spring slot (19) and, as a loose part held by the leaf springs (11), can be pivoted into its blocking division by means of the push rod (21), and being on the bearing axle (26) of the Fußsciialthebels (4) on the same side a two-sided pawl lever (25) which is under spring pressure (22) and whose one lever arm (25a) is designed as a downward-facing locking lug (2?) _? which engages in the blocking division of the push rod (21) in a hole (28) of the push rod (21) and the push rod (21) locks ^ and- its other lever arm (25b) as a foot control lever JO is designed to re-release the push rod (21) and unblocking the locking device with the foot trodden down can be" - 16 β c caster according to one or more of claims 3 to 5j, characterized in that the foot switch lever (4) is fork-shaped at its bearing end (4b) and the pawl lever (25) between the fork legs (4b ⁹ , 4b ") on the same pivot axis (26) is stored " 7 ° roller naoh one or more of claims 2 to 6, characterized in that the pawl lever (25) is a Angle lever is » 8ο roller according to one or more of claims 2 to 7 » characterized in that on the foot actuation lever arm (25b) of the pawl lever (25) has a kziopjf-like elevation (29) as Kick button is provided.