DK170717B1

DK170717B1 - Rotary brush for sweepers

Info

Publication number: DK170717B1
Application number: DK59793A
Authority: DK
Inventors: Kresten Spedtsberg
Original assignee: Kresten Spedtsberg
Priority date: 1993-05-24
Filing date: 1993-05-24
Publication date: 1995-12-18
Also published as: DK59793A; DK59793D0

Description

i DK 170717 B1in DK 170717 B1

Den foreliggende opfindelse angår en roterende kost til en fejemaskine omfattende en central valse og derpå anbragte ringformede børster.The present invention relates to a rotary broom broom comprising a central roller and annular brushes applied thereto.

Roterende koste til fejemaskiner er velkendte. De anvendes hyppigst 5 som traktordrevne koste. Sådanne fejemaskiner skal kunne klare mange opgaver. Om efteråret benyttes de til at feje blade op, og om vinteren benyttes de til at feje sne væk. Om foråret og gennem sommeren benyttes fejemaskinen til opfejning af grus og andet. Fejemaskinen anvendes således til renholdelse af veje, fortove, cykelstier, parkeringspiad-10 ser og lignende arealer. Fejemaskinen kan være ophængt på en traktor som et frontmonteret redskab eller et bugseret redskab. Fejemaskinen kan være drevet hydraulisk eller mekanisk. Fejemaskinen kan være indrettet for en fast vinkel indstilling for altid at feje sne, jord, støv, blade osv. til den ene side i forhold til traktoren eller for en 15 svingning for en vinkel indstilling for den modsatte side i forhold til traktoren.Rotary sweeper costs are well known. They are most commonly used 5 as tractor-driven costs. Such sweepers must be able to handle many tasks. In autumn they are used to sweep leaves, and in winter they are used to sweep away snow. In the spring and summer, the sweeper is used to sweep gravel and other things. The sweeper is thus used for cleaning roads, sidewalks, bike paths, parking paths and similar areas. The sweeper may be mounted on a tractor such as a front-mounted implement or a towed implement. The sweeper may be hydraulically or mechanically driven. The sweeper can be arranged for a fixed angle setting to always sweep snow, soil, dust, leaves, etc. to one side relative to the tractor or to a pivot for an angle setting for the opposite side relative to the tractor.

Den roterende kost på de kendte fejemaskiner består af en central valse med en fast og veldefineret bredde. På denne valse er der fast-20 spændt et antal ringformede børsteelementer, som hver er forsynet med en medbringer, således at de medbringes i rotation, når den centrale valse bringes i rotation.The rotary broom of the known sweepers consists of a central roller with a fixed and well-defined width. On this roller, a plurality of annular brush elements are fastened tightly, each of which is provided with a carrier so that they are rotated as the central roller is rotated.

Til trods for at en anvendelse af en fejekost med variabel længde kan 25 være ønskelig i mange situationer, hvor der fejes på fortove, cykelstier, busholdepladser og lignende, hvor en forbikørsel forbi skilte, træer, standere og lignende kan ske med traktoren men ikke med kosten, som rager uden for traktorens bredde, så har man hidtil ikke anvist en breddevariabel fejemaskine med en roterende kost. Den nærmeste kendte 30 teknik findes fra US patentskrift nr. 1.544.662, der er udstedt i 1921.Despite the use of a variable-length sweeping brush, 25 may be desirable in many situations where sweeping on sidewalks, bike paths, bus stops and the like, where passing by signs, trees, stands and the like, can happen with the tractor but not with the broom, which extends beyond the width of the tractor, has so far not been used a width-variable sweeper with a rotating broom. The closest known technique is found in U.S. Patent No. 1,544,662, issued in 1921.

I dette skrift beskrives en fejemaskine, der består af to rette koste-rækker, som kan vinkel indstilles for fejning af veje med forskellige bredder. Den kendte konstruktion omfatter imidlertid ikke en roterende kost.This publication describes a sweeper consisting of two straight cost rows, which can be set angle for sweeping roads of different widths. However, the known construction does not include a rotary diet.

3535

Det er formålet med den foreliggende opfindelse at anvise en roterende kost til en fejemaskine, som har en variabel længde.It is an object of the present invention to provide a rotary broom for a variable length sweeper.

Dette opnås ifølge den foreliggende opfindelse med en roterende kost DK 170717 B1 2 af den indledningsvis nævnte type, som er særpræget ved, at den centrale valse omfatter to indbyrdes teleskopérbare elementer, og at de ringformede børster er. indbyrdes adskilt af fjederelementer, der i brug udøver en trykkraft på de nærliggende ringformede børster.This is achieved according to the present invention with a rotary broom DK 170717 B1 2 of the type mentioned initially, which is characterized in that the central roller comprises two mutually telescopable elements and that the annular brushes are. separated by spring elements which in use exert a compressive force on the adjacent annular brushes.

55

For at opnå en variation af kostens længde forskydes de to teleskopérbare elementer i forhold til hinanden for indstilling af en ønsket bredde. Under en indstilling af de to teleskopérbare elementer, som udgør den centrale valse, sikres en jævn fordeling af de ringformede 10 børster over hele længden af kosten på grund af fjederelementerne. Idet fjederelementerne udøver en trykkraft på de nærliggende ringformede børster, vil en teleskopisk forskydning for at øge kostens længde blot give en større afstand mellem de ringformede børsteelementer. I praksis har det imidlertid vist sig, at den større bredde, som optræ-15 der, ikke påvirker kostens fejeevne væsentligt, da de ringformede børster har en vis spredning i forhold til et børsteplan vinkelret på kostens rotationsakse. Ved at forskyde de to teleskopérbare elementer ind i hinanden med henblik på at formindske kostens længde, sker der en sammenklemning af fjederelementerne, således at der stadig optræder 20 en jævn fordeling af de ringformede børster over kostens længde.In order to achieve a variation in the length of the diet, the two telescopable elements are displaced relative to each other for setting a desired width. During an adjustment of the two telescopable elements constituting the central roller, an even distribution of the annular 10 brushes is ensured over the entire length of the diet due to the spring elements. As the spring elements exert a compressive force on the adjacent annular brushes, a telescopic displacement to increase the length of the broom merely provides a greater distance between the annular brush elements. In practice, however, it has been found that the larger width which occurs does not significantly affect the sweeping ability of the broom, since the annular brushes have some spread over a brush plane perpendicular to the axis of rotation of the broom. By displacing the two telescoping elements with one another in order to reduce the length of the broom, the spring elements are clamped together so that an even distribution of the annular bristles still occurs over the length of the broom.

Det er indlysende, at en bæreramme, hvorpå kosten er monteret, ligeledes skal kunne bibringes en breddevariation, således at lejringen af hver akselende for den roterende kost forskydes i det mindste i den 25 ene side af kosten. En sådan teleskopisk forskydning af kostens ramme sammen med den teleskopiske forskydning af kosten vil imidlertid ikke blive forklaret nærmere, da det må antages at ligge inden for fagmandens muligheder i lyset af nærværende opfindelse.It is obvious that a support frame on which the broom is mounted should also be able to provide a width variation so that the bearing of each shaft end of the rotary broom is displaced at least on one side of the broom. However, such a telescopic displacement of the diet frame together with the telescopic displacement of the diet will not be explained further, since it is presumed to be within the scope of one skilled in the art in the light of the present invention.

30 Ifølge en foretrukket udførelsesform for opfindelsen vil fjederelementerne være ringformede fjederelementer, der har et V-formet tværsnit eller et andet tværsnit, og som fortrinsvis langs hele omkredsen er i tætnende anlæg med de tilstødende børster for derved at undgå, at * snavs, fugt og lignende trænger ind mellem de ringformede børster og 35 den centrale valse. Dette ville kunne give anledning til slitage og funktionssvigt.According to a preferred embodiment of the invention, the spring elements will be annular spring elements having a V-shaped cross-section or other cross-section, and preferably along the entire circumference, sealing abutment with the adjacent brushes so as to avoid any dirt, moisture and similar penetrates between the annular brushes and the central roller. This could give rise to wear and tear and malfunction.

Fjederelementerne kan udgøres af elastiske manchetter, hvori en fjeder er anbragt løst eller indstøbt for at opnå trykkraften på de nærlig- DK 170717 B1 3 gende ringformede børster.The spring elements can be constituted by elastic cuffs in which a spring is placed loosely or molded to obtain the compressive force on the adjacent annular brushes.

Det foretrækkes at fremstille de to teleskopérbare elementer af runde rør, som er forsynet med indgrebsorganer for samtidig medbringning af 5 begge rør, når den roterende kost på traditionel måde drives ved drivorganernes indgreb med den ene aksel tap. Herved vil det ene rør drives og medbringe det andet rør. Alternativt kan de teleskopérbare elementer fremstilles af mangekantede rør. Dette kan i visse situationer også være ønskeligt af hensyn til styrken i den centrale valse.It is preferred to produce the two telescoping elements of round tubes, which are provided with engagement means for simultaneously carrying both tubes when the rotary broom is traditionally driven by the engagement of the drive means with the one shaft pin. This will drive one tube and bring the other tube along. Alternatively, the telescopable elements may be made of multilayered tubes. This may also be desirable in certain situations for the strength of the central roller.

1010

Opfindelsen vil herefter blive forklaret nærmere under henvisning til den medfølgende tegning, hvor fig. 1 viser et skematisk billede til illustration af en fejemaski-15 ne omfattende en roterende kost ifølge opfindelsen, fig. 2 et partielt snit gennem en del af den i fig. 1 viste roterende kost, fig. 3 et billede til illustration af den centrale valse til en kost ifølge opfindelsen, 20 fig. 4-8 forskellige snit gennem den i fig. 3 viste centrale valse, og fig. 9 et partielt snit gennem et fjederelement ifølge opfindelsen.The invention will now be explained in more detail with reference to the accompanying drawing, in which fig. Figure 1 is a schematic view illustrating a sweeper comprising a rotary broom according to the invention; 2 is a partial section through a portion of the device shown in FIG. 1; FIG. Figure 3 is a view illustrating the central roller for a broom according to the invention; 4-8 different sections through the embodiment of FIG. 3, and FIG. 9 is a partial section through a spring element according to the invention.

r I fig. 1 ses en roterende kost 1 ifølge opfindelsen. Den roterende 25 kost 1 er opbygget af en central valse 2 samt et antal ringformede børster 3, som er monteret omkring den centrale valse 2. Kosten 1 er monteret i en ramme 4, som omfatter en tilkoblingsanordning 5 for tilkobling til en traktor eller andet (ikke vist) drivende køretøj. Rammen omfatter endvidere en tværbjælke 6, der understøtter to sidekon-30 soller 7,8, som hver er forsynet med et leje til understøtning af akseltappe 9 i hver ende af kosten 1.r In FIG. 1 shows a rotating broom 1 according to the invention. The rotating broom 1 is made up of a central roller 2 as well as a plurality of annular brushes 3 mounted around the central roller 2. The broom 1 is mounted in a frame 4 which includes a coupling device 5 for coupling to a tractor or other ( not shown) driving vehicle. The frame further comprises a crossbeam 6 supporting two side brackets 7,8, each provided with a bearing for supporting shaft pin 9 at each end of the broom 1.

Kosten 1 kan bibringes en større længde. Således kan sidekonsollerne 8,9 udskydes til stillingerne 8',9'. Alternativt kan kun én af side-35 konsollerne være forskydelig. Sidekonsollerne 8,9 kan forskydes, da tværbjælken 6 udgøres af en ydre tværbjælke 10 og en inde i denne teleskopisk lejret indre tværbjælke 11 i hver side. En dobbeltvirkende hydraulisk cylinder 12.er tilvejebragt ved hver side af kosten. Den hydrauliske cylinder er monteret på en tap 13, der er fast forbundet DK 170717 B1 4 med den ydre tværbjælke 11. Ved den anden ende er cylinderen 12 monteret på en tap 14 i sidekonsollen 7,8. Cylinderen 12 har et indløb og et udløb 15,16, som muliggør en sammentrækning respektivt en udstrækning af cylinderens stempelstang 17 ved en formindskelse henholdsvis 5 forøgelse af kosten l's bredde.The diet 1 can be given a greater length. Thus, the side brackets 8,9 can be extended to positions 8 ', 9'. Alternatively, only one of the side-35 brackets may be slidable. The side brackets 8,9 can be displaced as the transverse beam 6 is constituted by an outer transverse beam 10 and an inner transverse beam 11 within each of these telescopes. A double acting hydraulic cylinder 12. is provided at each side of the diet. The hydraulic cylinder is mounted on a pin 13 which is firmly connected to the outer cross bar 11. At the other end, the cylinder 12 is mounted on a pin 14 in the side bracket 7,8. The cylinder 12 has an inlet and an outlet 15,16, which allows for a contraction and an extension of the piston rod 17 of the cylinder, respectively, by reducing and increasing the width of the diet 1, respectively.

Det er muligt at fremstille kosten, således at de to cylindre 12 akti- * veres samtidigt for samtidig udskydning af de to konsoller 7,8. Alternativt kan cylindrene 12 være indrettet for individuel aktivering, 10 således at brugeren valgfrit kan udskyde sidekonsollen 7 eller side-konsollen 8. Dette gør kosten mere fleksibel ved en passage forbi smalle steder, hvor traktoren eller et andet drivredskab kan passere, men hvor kosten kun kan passere med den reducerede bredde i den ene eller begge sider af kosten.It is possible to prepare the diet so that the two cylinders 12 are activated simultaneously for simultaneous release of the two brackets 7,8. Alternatively, the cylinders 12 may be arranged for individual activation 10 so that the user can optionally extend the side bracket 7 or the side bracket 8. This makes the broom more flexible by a passage past narrow places where the tractor or other drive can pass, but where the broom only can pass with the reduced width in one or both sides of the diet.

1515

For at opnå kostens længdevariation er den centrale valse 2 fremstillet af to teleskopérbare elementer. I den viste udførelsesform udgøres disse af et rundt indre rør 18 og et derom teleskopérbart forskydeligt rundt ydre rør 18'.To achieve the length variation of the diet, the central roller 2 is made of two telescopable elements. In the illustrated embodiment, these are constituted by a round inner tube 18 and a telescopably displaceable round outer tube 18 '.

2020

Fig. 2 viser et partielt billede, der primært tjener til at illustrere den måde, hvorpå de ringformede børster 3 er monteret på den centrale valse 2. I fig. 2 ses yderrøret 18', der afsluttes af et endedæksel 19, hvorpå akseltappen 9 er monteret. Hvert af de ringformede børste-25 elementer 3 består af et antal børstehår 20, som er indlejret i en ringformet stort set U-formet skål 21. I bunden af den U-formede skål 21 er der anbragt en medbringertap 22. Medbringertappen 22 sikrer børsternes rotation sammen med den centrale valse 2, idet der på ydersiden af røret 18 er fastsvejst eller fastskruet ydre medbringere 23 i 30 form af en række fladjern. Fladjernene 23, der også tjener til medbri ngn i ng af yderrøret 18' ved drivning af inderrøret 18, forløber i det væsentlige parallelt med en midtakse 24 for den centrale valse 2.FIG. 2 is a partial view which primarily serves to illustrate the manner in which the annular brushes 3 are mounted on the central roller 2. In FIG. 2, the outer pipe 18 'is terminated by an end cap 19 on which the shaft pin 9 is mounted. Each of the annular brush elements 3 consists of a plurality of bristles 20 embedded in an annular substantially U-shaped bowl 21. A carrier pin 22 is provided at the bottom of the U-shaped bowl 21. rotation along with the central roller 2, the outer carrier 23 being welded or screwed to the outside of the tube 18 in the form of a series of flat irons. The flat irons 23, which also serve to engage the outer tube 18 'in driving the inner tube 18, extend substantially parallel to a central axis 24 of the central roller 2.

**

Mellem hver ringformet børste 3 er der anbragt et fjederelement 25. I 35 den viste udførelsesform består hvert fjederelement af en ringformet elastisk eftergive!ig manchet 26. Manchetten har et stort set V-formet tværsnit, der ender i to ben 27, som langs hele omkredsen er i tæt anlæg mod de ydre sider af de U-formede skåle 21. Det tætte anlæg mellem manchetterne 26 og skålene 21 forhindrer indtrængning af vand og snavs DK 170717 B1 5 i mellemrummet mellem den centrale valse 2 og børsteelementerne 3. En sådan indtrængning af snavs og lignende vil kunne forårsage driftsforstyrrelser og unødigt slid. Manchetten 26 udøver en trykkraft på skålene 21 på grund af en fjeder 28, som er anbragt inde i manchetten.Between each annular brush 3 is arranged a spring element 25. In the embodiment shown, each spring element consists of an annular elastic resilient sleeve 26. The sleeve has a substantially V-shaped cross-section, ending in two legs 27, which along the whole the circumference is in close contact with the outer sides of the U-shaped cups 21. The tight contact between the cuffs 26 and the cups 21 prevents the penetration of water and dirt in the space between the central roller 2 and the brush elements 3. Such an penetration dirt and the like may cause disruptions and unnecessary wear. The sleeve 26 exerts a compressive force on the cups 21 due to a spring 28 disposed within the sleeve.

5 Fjederen 28 forløber spiralformet inde i manchetten 26 og danner sammen med denne fjederelementet 25.5 The spring 28 extends helically within the sleeve 26 and forms with this spring element 25.

Ved en sammenskydning af kosten 1 vil fjedrene 28 udøve en større trykkraft imod skålene 21. Selv ved den maksimale udstrækning af kos-10 ten 1 vil fjedrene 28 stadig udøve en trykkraft, som sikrer, at de ringformede børster 3 fordeles jævnt over hele kostens længde uanset længden af kosten 1.By pushing the broom 1, the springs 28 will exert greater compressive force against the bowls 21. Even at the maximum extent of the broom 1, the springs 28 will still exert a compressive force which ensures that the annular brushes 3 are evenly distributed over the entire length of the broom. regardless of the length of the diet 1.

Fig. 3 er et billede med visse dele skåret væk og med indsatte snit 15 svarende til fig. 4 og 8 til illustration af den centrale valse 2 til en kost 1 ifølge opfindelsen. Fig. 3 illustrerer snittene A-E, som er vist i figurerne 4-8 respektivt. Den centrale valse 2 vil derfor blive forklaret under samtidig henvisning til fig. 3-8.FIG. 3 is a view with certain parts cut away and with inserted section 15 corresponding to FIG. 4 and 8 to illustrate the central roller 2 for a broom 1 according to the invention. FIG. 3 illustrates the sections A-E shown in Figures 4-8 respectively. The central roller 2 will therefore be explained with reference to FIG. 3-8.

20 Den centrale valse består som tidligere nævnt af et inderrør 18 og et yderrør 18'. Endedæksler 19 er fastboltet aftageligt ved de ydre ender af inder- og yderrøret 18,18'. Som vist i fig. 2 er der på yderrøret 18' fastsvejst en medbringer 23 i form af et fastsvejst fladjern. Medbringeren 23 fremgår tydeligt af fig. 8. Medbringeren 23 tjener ikke 25 alene til medbringning af de ringformede børster men tjener tillige til medbringning af yderrøret 18', idet inderrøret 18 i den viste udførelsesform udgør den drivende ende og drives via aksel tappen 9.20 As previously mentioned, the central roller consists of an inner tube 18 and an outer tube 18 '. End caps 19 are bolted removably at the outer ends of the inner and outer tubes 18, 18 '. As shown in FIG. 2, a carrier 23 in the form of a welded flat iron is welded to the outer tube 18 '. The carrier 23 is clearly shown in FIG. 8. The carrier 23 not only serves 25 for carrying the annular brushes but also serves for carrying the outer tube 18 ', the inner tube 18 in the illustrated embodiment constituting the driving end and being driven via the shaft pin 9.

For at etablere medbringningen af yderrøret 18' er inderrøret 18 for-30 synet med en medbringer 29, som befinder sig på samme diameter som medbringeren 23. Medbringeren 29 er ved hjælp af bolte 30 og et afstandsstykke 31 fastboltet til inderrøret 18 ved den højre ende heraf. Afstandsstykket 31 har en sådan tykkelse, at yderrøret kan passere imellem ydersiden af inderrøret 18 og indersiden af medbringerne 29.To establish the attachment of the outer tube 18 ', the inner tube 18 is provided with a carrier 29 which is of the same diameter as the carrier 23. The carrier 29 is bolted to the inner tube 18 at the right end by means of bolts 30 and a spacer 31 thereof. The spacer 31 has a thickness such that the outer tube can pass between the outside of the inner tube 18 and the inside of the carrier 29.

35 Den indbyrdes placering af inder- og yderrøret 18,18' samt medbringerne 23,29 fremgår tydeligst af fig. 6. Snittet i fig. 6 viser, at der optræder et mellemrum mellem inderrøret 18 og yderrøret 18'. Dette mellemrum vil, således som det fremgår af snittet i fig. 7, indeholde et gi ideelement i form af et friktionsreducerende materiale 32. I den DK 170717 B1 6 viste udf ørel sesf orm er materialet 32 tilvejebragt med form som bøsninger 33,34. Alternativt kan materialet 32 være tilvejebragt i form af langsgående strimler. Materialet 32 er fortrinsvis et teflonmateriale.35 The mutual positioning of the inner and outer tubes 18,18 'as well as the carriers 23,29 is most clearly shown in FIG. 6. The section of FIG. 6 shows that there is a gap between the inner tube 18 and the outer tube 18 '. This gap, as shown in the section in FIG. 7, contain a non-ideal element in the form of a friction-reducing material 32. In the embodiment shown in DK 170717 B1 6, the material 32 is provided in the form of bushings 33,34. Alternatively, the material 32 may be provided in the form of longitudinal strips. The material 32 is preferably a Teflon material.

55

Af fig. 5 ses, at medbringerne 29, som er forbundet med det drivende inderrør 18, over en vis afstand er frit svævende. Det bemærkes, at fig. 3 indikerer, at frembringerne 29 har en større radial dimension end frembringerne 23. Dette skyldes imidlertid forskellige vinkelstil-10 linger for medbringerne 29 og 23, således som det er illustreret i de snitbilleder, som er indlagt i fig. 3.In FIG. 5 it is seen that the carriers 29, which are connected to the driving inner tube 18, are freely suspended over a certain distance. It should be noted that FIG. 3 indicates that the generators 29 have a larger radial dimension than the generators 23. However, this is due to different angular positions of the drivers 29 and 23, as illustrated in the sectional images shown in FIG. Third

Fig. 3 viser den centrale valse 2 set i en stilling for maksimal længde af kosten 1 ifølge opfindelsen. Kosten 1 kan have en længde på 1750 15 mm, medens kosten i sin minimale længde har en længde på 1250 mm. I en kost af denne størrelse behøver bøsningerne 33,34 af friktionsreducerende materiale 32 blot at have en aksial udstrækning på ca. 150 mm. I kosten anvendes to bøsninger 33,34, som henholdsvis er fastgjort til inderrøret 18 og yderrøret 18'.FIG. 3 shows the central roller 2 seen in a position for maximum length of the broom 1 according to the invention. The broom 1 can have a length of 1750 15 mm, while the broom in its minimum length has a length of 1250 mm. In a diet of this size, the bushings 33, 34 of friction-reducing material 32 need only have an axial extension of about 10 inches. 150 mm. In the diet, two bushings 33,34 are used which are respectively attached to the inner tube 18 and the outer tube 18 '.

20 I fig. 3 indikerer 35 den afstand, som inderrøret 18 og yderrøret 18' kan sammenskydes. Dette er afstanden 35, der er afstanden mellem enden 36 af afstandsstykkerne 31 og enden 37 af yderrøret 18'. Afstanden 38 indikerer den afstand, hvor den ydre medbringer 29 fra inderrøret 18 25 kan hvile uden på yderrøret 18'.In FIG. 3 indicates the distance at which the inner tube 18 and the outer tube 18 'can be pushed together. This is the distance 35 which is the distance between the end 36 of the spacers 31 and the end 37 of the outer tube 18 '. The distance 38 indicates the distance at which the outer carrier 29 from the inner tube 18 25 can rest outside the outer tube 18 '.

Endedækslerne 19 er monteret aftageligt på rørene 18,18' af hensyn til en adskillelse af kosten, for eksempel med henblik på at udskifte bøsningerne 33,34 eller for at udskifte de ringformede børster 3 og/eller 30 fjederelementerne 25.The end covers 19 are removably mounted on the tubes 18, 18 'for a separation of the broom, for example, in order to replace the bushings 33, 34 or to replace the annular brushes 3 and / or the spring elements 25.

Børsteelementerne er monteret på den centrale valse 2, således at deres medbringertap 22 ikke er fastklemt mellem medbringerne 29 og 23. *The brush elements are mounted on the central roller 2 so that their carrier pin 22 is not clamped between the carrier 29 and 23. *

Medbringertappene 22 vil således altid befinde sig ved den rotations-35 mæssige forreste sidekant af den ene af medbringerne 29,23. Der kan * alternativt være anbragt separate medbringere (ikke vist) med en med-bringningsflade eller et medbringningsspor for indgreb med medbringertappene 22.Thus, the driver pins 22 will always be at the rotational front side edge of one of the drivers 29,23. Alternatively, separate carriers (not shown) may be provided with a carrier surface or a carrier track for engagement with the carrier pins 22.

7 DK 170717 B1 I fig. 9 er der vist et partielt snit gennem et fjederelement 39 ifølge opfindelsen. Fjederelementet 39 adskiller sig fra fjederelementet 25 ved, at en fjeder 40 er indstøbt i en elastisk ringformet manchet 41.7 DK 170717 B1 In fig. 9, a partial section through a spring element 39 according to the invention is shown. The spring member 39 differs from the spring member 25 in that a spring 40 is embedded in an elastic annular sleeve 41.

55

Selv om opfindelsen ovenfor er forklaret under henvisning til de viste udførelsesformer, bemærkes det, at andre udførelsesformer er mulige inden for omfanget af de efterfølgende krav.Although the invention has been explained above with reference to the embodiments shown, it is noted that other embodiments are possible within the scope of the appended claims.

10 I stedet for anvendelsen af runde, cylindriske, teleskopérbare rør 18,18' er det således muligt i stedet at anvende mangekantede rør (ikke vist). Herved undgås behov for separate medbringere 23,29, som kræver en præcis montage for at opnå en jævn fordeling af belastningen på alle medbringerne.Thus, instead of using round cylindrical telescopable tubes 18,18 ', it is possible to use multi-angled tubes (not shown) instead. This avoids the need for separate carriers 23,29, which require precise mounting to achieve an even distribution of the load on all the carriers.

15 I den viste udførelsesform er der for hvert af rørene 18,18' anvendt fire medbringere 23 henholdsvis 29. Det er imidlertid også muligt at anvende færre eller flere medbringere for hvert af rørene 18,18'.In the embodiment shown, four drivers 23 and 29 are used for each of the pipes 18,18 ', however, it is also possible to use fewer or more carriers for each of the pipes 18,18'.

20 25 30 3520 25 30 35

Claims

A rotary broom (1) for a sweeper comprising a central roller (2) and then annular brushes (3), characterized in that the central roller (2) comprises two mutually telescoping elements (18, 18 '), and that the annular brushes (3) are separated from each other by spring elements (25, 39) which in use exert a compressive force on the adjacent annular brushes (3).

Rotary broom according to claim 1, characterized in that each spring element (25, 39) is constituted by an annular spring element having a substantially V-shaped cross-section.

Rotary broom according to claim 1 or 2, characterized in that each annular spring element (25, 39) is sealed along the entire circumference against the two adjacent annular brushes (3).

Rotary broom according to any one of claims 1-3, characterized in that the spring element (25, 39) is constituted by an annular elastic cuff in which a spring (40) is embedded.

Rotary broom according to any one of claims 1-3, characterized in that the spring element (25, 39) is constituted by an annular elastic cuff (26), in which a spring (28) is loosely arranged. 25

Rotary broom according to any one of the preceding claims, characterized in that the telescopable elements (18, 18 ') comprise an outer (18') and an inner tube (18).

Rotary broom according to claim 6, characterized in that the outer (18 ') and inner tubes (18) are cylindrical tubes and are provided with engaging means (23, 29) for simultaneous attachment of both tubes by drive thereof. one tube. '

Rotary broom according to claim 6, characterized in that the c outer (18 ') and the inner tube (18) are made of polygonal tubes.

Rotary broom according to any one of claims 6-8, characterized in that in the inner and outer tubes (18, 18 ') there are provided 9 (170) idea elements (32) which are at least fixed to one of the pipes.

Rotary broom according to claim 9, characterized in that the sliding elements (32) are made of teflon bushes (33,34). 15 20 25 30 35