A DEVICE FOR CASSETTES FOR SPRING MEMBERS IN A ROTOR FOR E.G. A SWEEPING MACHINE

Abstract: A device for cassettes (3) for spring members (4) for a machine intended i.a. for cleaning of streets and roads, wherein the cassettes (3) are arranged in a bracket (2) around the periphery of a roller (1) and extending mainly in the longitudinal direction of the roller (1) and including spring members (4), such as radially projecting bristles, the ends of which are brought in contact with the ground at the rotation of the roller (1), wherein each cassette (3) includes a longish bar (9), which can be arranged in facing grooves (8) in brackets (2), extending along the roller (1), wherein each spring member is bended double around a locking means (10), extending in the longitudinal direction of the bar (9), and wherein the bar (9) shows a mainly U-shaped cross section with two facing sides (9.1) and a bottom between them. The facing sides (9.1) in the bar (9) are mutually connected by connecting means (11) extending across the cross section of the bar (9) at a distance from each other along the bar (9), wherein the bar (9) is divided into cells (9.4).

Description: A DEVICE FOR CASSETTES FOR SPRING MEMBERS IN A ROTOR FOR E.G. A SWEEPING MACHINE TECHINCAL FIELD The present invention concerns a device at cas¬ settes for spring members for a machine intended i.a. for cleaning of streets and roads, wherein the cassettes are arranged in brackets around the periphery of a roller ex¬ tending mainly in- the longitudinal direction of the rol- ler. The cassettes include spring members, such as radi¬ ally projecting bristles, which ends are brought in con¬ tact with the ground at the rotation of the roller. BACKGROUND TECHNICS A great number of solutions are known for faste- ning of cassettes for bristle bunches arranged around the periphery of a bristle roller, which in its turn is rota- tably mounted on a sweeping machine or the similar. The patent publication US 4 302 863 describes a bristle rol¬ ler showing longish cassettes, in which bunches of brist- les are arranged in openings along the extension of each cassette. Each cassette is accomodated in a groove exten¬ ding along the length of the bristle roller and is con¬ stituted by two facing U-shaped sheet profiles, which show facing openings, in which bristle bunches are ar- ranged with radially projecting bristles. The bristle bunches include spring members, which are bended double at the bottom of each bunch around a locking wire, which is arranged underneath the sheet profile located close to the bristle roller and fixed by a loop-shaped projection at the under side of the profile. The cassettes are given a sufficiant rigidity in that the two sheet profiles engage and constitute a closed cross section. A single U-shaped profile open outwards would have a too low rigidity to be practially used. Another embodiment of a bristle roller is known from the patent publication US M M98 210. In this a cas¬ sette is arranged in brackets, which in its turn are attached upon a longitudinally extended roller. The brac¬ kets show sliding grooves in which the cassettes are brought. The spring members in each cassette are arranged along the full extension of the cassette and are bended double around a locking wire extending along the bottom of the cassette. The spring members are kept in the cas¬ sette in that this is plastically as well as elastically deformed after that the spring members are mounted in that way that the locking wire is kept at the bottom of the cassette and the spring members are jammed along the extension of the cassette. A drawback with cassettes of this design is that the locking wire is not.fixed in an exact position sideways or vertically along the extension of the cassette. Cassettes according to this embodiment also are sensitive for water and dirt penetrating into the inner of the cassettes as well as the brackets for the same. DESCRIPTION OF THE INVENTION The purpose with the present invention is to bring about a device at cassettes for spring members for a machine intended i.a. for cleaning of streets and roads, and wich do not show the drawbacks which are pre¬ sent at up to now known cassettes. The cassettes accor¬ ding to the invention are arranged in brackets around the periphery of a roller extending mainly in the longitudi¬ nal direction of the roller. Each cassette include spring members such as radially projecting bristles, the ends of which are brought in contact with the ground at the rota¬ tion of the roller. Each cassette include a longish bar, which can be arranged in facing grooves in brackets, ex¬ tending along the extension of the roller. The spring members are arranged bended double around a locking means, extending in the longitudinal direction of the bar. The bar shows a mainly U-shaped cross section inclu- ding two facing sides and a bottom them between. The de¬ vice accordning to the invention is characterized in that the two facing sides in the bar are mutually connected by connecting means extending across section of the bar in a distance from each other along the extension of the bar, by which the bar is divided into cells. By the connecting means is achieved that the U-shaped bar becomes a satis- factory rigidity without being designed with a closed cross section. The dividing into cells permits that spring members can be placed only in some of the cells along the extension of the bar in that way that the spring members in these cells are constituting bunches along the extension of the bar. The locking means can be fixed relative to the connecting means or constitute an integrated part of the same. By that is achieved that the locking means is fixed sideways and kept in the bar by the contact with the con- necting means, which are preferably arranged at same dis¬ tances along the extension of the bar. By that also the spring members in the bar, bended double around the loc¬ king means extending in the longitudinal direction of the bar, are fixed. Preferably the connecting means are constituted by transverse walls, extending mainly perpendicular to the long sides, showing holes for a locking means in the shape of a locking wire extending in the longitudinal direction of the bar. The bar can be manufactured from sheet metal, at which the transverse walls are constitu¬ ted by lugs, which are punched from each long side and folded to each other, preferably in such a way that the lugs are in contact and overlap. Further holes are punched from each long side at each lug in that way that the holes are congruent as the lugs are folded to each other. The brackets for the cassettes for spring members are designed in that way that a duct is consti¬ tuted between the bottom of the bracket and the bottom of the bar. The bottom of the bar also shows holes over the extensions of the bar, by which water can be drained from the bar and flow out through the duct in the bottom of the bracket. Preferably spring members are arranged in all cells along the extension of the bar and preferably in cages, preferably manufactured of plastic, which project above each long side of the bar. Each cage can be consti¬ tuted from a flat body in an initial position, which after beeing brought down into the bar will be endowed with the desired shape of the cage. However each cage also can have a finished shape showing a mainly perpen- dicular lower portion with holes for the locking means in two facing walls and a funnel-shaped, outwards sloping upper portion, to which the spring members are resting when the roller is working. The long sides of the bar show preferably out- wards directed flanges, which are in connection with the brackets on the roller of the rotor. The long sides of the bar also can show inwards directed ridges to which the outermost located spring members can rest in the cases when the bar is not provided with projecting cages. In an alternative embodiment of the invention the bar can be manufactured of plastic at which the connecting means are made as cross walls constituting portions of the bar. At mounting of spring members in a bar mainly straight spring members are arranged across the bar at cells which are to be filled with spring members. A de¬ pression tool after that is caused to move to the spring members and press the same into the cells in the bar en¬ dowing a U-shape to the spring members into a position between the holes in the connecting means of the bar and the bottom on the bar. The depression tool can show a groove at its front end parallel with the bar, permitting a locking means, e.g. in the shape of a locking wire, to be inserted through the holes in all connecting means with the depressing tool in a lowered position in that way that the spring members are kept in the cells in the bar. Alternatively a disc-shaped depression tool at first can be caused to press the spring members into the cells in the bar and after that caused to retract from the bar that the holes will be free for the locking means to be inserted through the holes in the connecting means. In the case the spring members is to be placed in a cage constituted by a flat body the spring members are arranged lying on the body across the bar at cells which are to be filled, after which the depression tool is caused to depress the body as well as the spring mem¬ bers in the bar, at which a cage is constituted and caused to surround the spring members at each cell. In the case when the cage has a finished shape from the be¬ ginning the spring members, temporarily mounted in each cage, before this is brought into a cell in the bar. In this case the spring members are depressed in the cage keeping the holes in the cage free for the locking means in that way that the locking means can be inserted after that the cage with the spring members are brought down into the bar. DESCRIPTION TO DRAWINGS Below the invention is described as an embodi¬ ment according to the enclosed drawings. Figure 1 shows a rotor according to the inven¬ tion in a cross section. Figure 2 shows a portion of the rotor according to figure 1 enlarged with two brackets and belonging cassettes for spring members. Figure 3 shows a bracket without the- cassette and not fully complete. Figure 4 shows a cassette for spring members partly in a cross section and partly in a direction to its inner space. Figure 5 shows a cassette according to figure 4 during mounting of spring members by means of a tool. Figure 6 shows an alternative embodiment of a cassette with spring members mounted. Figure 7 and 8 show a cage for spring members in a mounted condition and in a condition before mounting. Figure 9 shows the cage for spring members ac¬ cording to figure 7 mounted in a cassette. Figure 10 shows an alternative embodiment of a cage for spring members in a cross section and in a longitudinal section. A rotor for e.g. a sweeping machine includes a cylindric longish roller 1 carrying brackets 2 for long- ish cassettes 3 with spring members 4, which extend along the roller 1 and are arranged next to each other along the periphery of the roller 1. Each bracket 2 shows a mainly U-shaped cross section and is, in this example, manufactured from extruded aluminium and provided with a longitudinal fastening means in the shape of a dovetail 5, which is intended to be brought into a corresponding groove in the roller 1. In each of the parallel sides of the bracket 2 facing ducts 6 are arranged, by means of which sliding sleeves 7 of plastic are kept. The two mainly parallel sliding sleevs 7 in a bracket 2 show facing ducts 8, in which a cassette is intended to be mounted. Each cassette 3 include a bar 9, which in this example is manufactured of sheet steel, and which, as the bracket 2, shows a mainly U-shaped cross section, inclu¬ ding facing, mainly parallel long sides 9.1 and between them a bottom 9.2. The spring members 4 are brought down into the bar 9 bended double and arranged around a lock¬ ing means in the shape of a locking wire 10 of steel ex¬ tending along the cassette 3- The facing long sides 9.1 of the bar 9 are connected by connecting means in the shape of cross walls 11 extending across the cross sec¬ tion of the bar 9 at a distance from each other along the bar 9, by which the bar 9 is divided into cells 9.4. The cross walls 11 are made in that way that lugs 11.1 are punched from each long side 9.1 and folded to each other, at which also holes 11.2 are punched from each lug 11.1 in that way that the holes 11.2 are congruent when the lugs 11.1 are folded to each other, permitting the locking wire 10 to be brought through the cross walls 11. The long sides 9.1 of the bar 9 show outwards directed flanges 9.3, which are in connection with the grooves 8 of the sliding sleeves 7 in the bracket 2. The long sides 9.1 of the bar 9 also can show inwards directed ridges 9.5, as shown in an alternative embodiment of the bar 9 in figure 6. The bottom 9.2 of the bar 9 shows holes 12 for draining of eventually penetrating water to a duct along the bottom of the bracket 2, from which the water can flow out. At mounting of spring members 4 in a bar 9 ac¬ cording to figure 4 and 5 straight spring members are placed symmatrically across each cell 9.4 of the bar 9, after which a depression tool 13 in the shape of a disc with a rounded front edge is brought to move against the spring members 4 and down into the bar 9 and at that bend the spring members 4 into a U-shape. In figure 5 spring members 4 are shown after being bended in a position in which the depression tool 13 is moved out from the bar 9. The locking wire 10 now can be inserted in the hole 11.2 in each cross wall 11.1 and lock the spring members 4 in the bar 9. In an alternative embodiment of the invention the spring members 4 can be arranged in cages 14, prefe- rably manufactured of plastic, which project from each long side 9.1 of the bar 9. Each cage 14 can be made from a flat body in a starting position as shown in figure 8, which after beeing brought down into the bar 9 will be endowed the desired shape of the cage 14. The body can be provided with notches 14.1 constituting holes for the locking wire 10 after mounting of the cage 14. . In another alternative embodiment of the inven¬ tion each cage 14 can have a finished shape from the be¬ ginning such as shown in figure 10. The already finished cage 14 shows a perpendicular lower part with holes 14.2 for the locking wire 10 in two opposite walls which, af¬ ter mounting of the cage 14, will be close to each cross wall 11.1 in the bar 9. The cage 14 according to figure 10 also shows funnel-shaped outwards sloping walls 14.3, to which the spring members 4 are resting at sweeping with the rotor. Preferably cages 14, preferably made of plastic, are used when spring members 4 are constituted by metal bristles, e.g. steel bristles with a diameter of about 0,45 mm. The cages 14 here constitute mainly a blanking between the long sides 9.1 of the bar 9 and the spring members 4, which can vary in number and thickness. The number of bristles and the material in these spring mem¬ bers 4 are determining for the brushing characteristics of the device. However the cages 14 can be excluded in a bar if the spring members are constituted by relatively thick plastic bristles e.g. with a rectangular cross sec¬ tion of 1x2 mm. However it is within the scope of the in¬ vention to use spring members 4 of plastic bristles as well as metal bristles in the bars 9 with or without presence of cages 14.

Claims: CLAIMS 1. A device at cassettes (3) for spring members (4) for a machine intended i.a. for cleaning of streets and roads, at which the cassettes (3) are arranged in brackets (2) around the periphery of a roller (1) exten¬ ding mainly in the longitudinal direction of the roller (1) and including spring members (4) such as radially projecting bristles, which ends are brought in contact with the ground at the rotation of the roller (1), where- in each cassette (3) include a longish bar (9) which can be arranged in facing grooves (8) in brackets (2) exten¬ ding along the roller (1), wherein each spring member is bended double around a locking means (10), extending in the longitudinal direction of the bar (9), and wherein the bar (9) show a mainly U-shaped cross section with two facing long sides (9.1) and a bottom (9-2) them between, c h a r a c t e r i z e d in that the two facing long sides (9-1) of the bar (9) are mutually and firmly con¬ nected by connecting means (11) extending across the cross section of the bar (9) at a distance from each other along the bar (9), wherein the long sides (9.1) of the bar (9) are kept together by force and the bar (9) is divided into cells (9.4). 2. A device according to claim 1, c h a r a c - t e r i z e d in that the locking means (10) can be fix¬ ed relative to the connecting means (11) or constitute an integrated portion of the connecting means (11). 3. A device according to claim 1 or 2, c h a ¬ r a c t e r i z e d in that the connecting means (11) is constituted by cross walls extending mainly perpendicular to the long sides (9.1) and showing holes for a locking wire (10) longitudinally extending in the bar (9). 4. A device according to claim 3 > c h a r a c ¬ t e r i z e d in that the bar (9) is manufactured of sheet metal and that the cross walls (11) are .constituted by lugs (11.1) punched form each long side (9.1) and fol¬ ded to each other and that holes (11.2) are punched from each lug (11.1) in that way that the holes (11.2) are congurent when the lugs (11.1) are folded to each other. 5. A device according to claim 3 > c h a r a c ¬ t e r i z e d in that the bar (9) is manufactured of plastic and that the cross walls (11) are made as inte¬ grated parts of the bar (9). 6. A device according to any of the claim 1-5, c h a r a c t e r i z e d in that the bottom (9.2) of the bar (9) shows holes (12) divided along the bar (9). 7. A device according to any of the claims 1-6, c h a r a c t e r i z e d in that the spring members (4) are arranged in all cells (9.4) or some cells (9.4) only along the bar (9). 8. A device according to any of the claims 1-7, c h a r a c t e r i z e d in that the long sides (9.1) of the bar (9) show outwards directed flanges (9.3) > which are connected to the brackets (2) on the roller (1). 9. A device according to any of the claims 1-8, c h a r a c t e r i z e d in that the long sides (9.1) of the bar (9) show inwards directed ridges (9.5), to which the outermost located spring members (4) in the bar (9) are resting. 10. A device according to any of the claims 1-9, c h a r a c t e r i z e d in that the spring mem¬ bers (4) are arranged in cages (14), preferably manufac¬ tured of plastic as a blanking between the long sides (9-1) of the bar (9) and the outermost located spring members, wherein the cages (14) can project above the long sides (9.1) of the bar (9). 11. A device according to claim 10, c h a ¬ r a c t e r i z e d in that each cages (14) is made from a flat body in a starting position, which after being brought down into the bar (9) is endowed the desired shape of the cage (14). 12. A method for mounting of spring members (4) in a bar (9) in a device according to any of the preceeding claims, at which mainly straight spring mem¬ bers (4) are arranged across the bar (9) at cells (9.4), which are constituted by connecting means (11) connecting the facing long sides (9.1) of the bar (9), and which is to be filled up by spring members (4), wherein a depres¬ sion tool (13) is caused to move against the spring mem¬ bers (4) and press the same into each cell (9., ) in the bar (9), c h a r a c t e r i z e d in that a disc-shaped depression tool (13) at first is caused to press down the spring members (4) in the cells (9.4) in the bar (9), wherein the spring members (4) are given a U-shape in a position between holes (11.2) in the connecting means (11) and the bottom (9.2) of the bar (9), that the de¬ pression tool (13) after that is caused to move back that the holes (11.2) are uncovered, that the locking means (10) is brought into the holes (11.2) in the connecting means (11), and that the depression tool (13) after that is removed from the spring members (4). 1 3 - A method to claim 12 , c h a r a c t e - r i z e d in that the straight spring members (4) are arranged lying upon a flat body arranged across the bar (9) at cells which are to be filled with spring members (4), and that the depression tool (13) is caused to press down the body as well as the spring members (4) in the bar (9), wherein a cage (14) is constituted and brought to surround the spring members (4) at each cell.

Inventors: DROESER WALTER, EKHOLM HANS, DROESER, WALTER, EKHOLM, HANS
Applicants: FILIPPA I VAESTERAAS HB
Application year: 1993
Main classification: A46B7
IPC codes: A46B13