EP3935999A1 - Central locking system for cleaning, sweeping, grinding or polishing segments - Google Patents

Abstract

The present invention relates to a central locking system for the detachable fixing of at least a first cleaning, sweeping, grinding or polishing segment (40) and a second cleaning, sweeping, grinding or polishing segment (40') on an axis of rotation (1) rotatably mountable support (12) to form a disc brush (11) or to form a cleaning, sweeping, grinding or polishing disc, with:- a central locking element (100) which is stable under tension and which, in relation to the axis of rotation (1), at a radially outwardly facing first abutment (101) of the first cleaning, sweeping, grinding or polishing segment (40) and at a radially outwardly facing second abutment (101') of the second cleaning, sweeping, grinding or polishing segment (40' ) can be brought into radial contact and is designed to exert a radially inwardly directed holding force on the first segment (40) and the second segment (40').

Description

technical field

The present invention relates to a central locking system for releasably fixing at least a first and a second cleaning, sweeping, grinding or polishing segment to a rotatable support to form a disc broom or to form a cleaning, grinding or polishing disc, which can typically be driven mechanically is. In addition, the present development relates to a carrier for forming a disc broom or for forming a cleaning, sweeping, grinding or polishing disc as well as a cleaning, sweeping, grinding or polishing device, which such a carrier, at least two cleaning, sweeping - Has grinding or polishing segments as well as a central locking system for this.

background

The use of so-called circular brooms for cleaning paved surfaces is well known. Common cleaning, sweeping, grinding or polishing machines or devices typically had a motor-driven and therefore rotatable head, for example in the form of a driving head, on which a carrier for a cleaning, sweeping, grinding or polishing device, such as a Carrier for a circular broom is arranged in a rotationally fixed manner.

Known and hitherto customary cleaning, sweeping, grinding or polishing discs have a disc-shaped disc body or a corresponding carrier disc, on the underside of which a large number of bristles, an abrasive grain and/or a fiber structure for surface treatment is typically arranged or formed.

For transport purposes in particular, it can prove advantageous to divide or segment disc brooms with a comparatively large diameter into individual segments and to detachably arrange several segments, each of which is provided with bristles, an abrasive grain or a fiber structure, on the disc body.

From the U.S. 3,766,589 A For example, a circular broom is known with an upper and a lower plate, which are connected to one another by means of several bolts. Individual segment bodies, each equipped with bristles, can be arranged between the plates. A bolt is provided for each of the individual segment bodies, by means of which the individual segment bodies can be detachably fastened between the upper and lower plates and replaced if necessary. However, replacing individual disc broom segments requires the use of tools that interact with the bolts. Consequently, the lower plate may have to be completely removed and dismantled, which in practice should only be possible with a disc broom that has been completely dismantled from a sweeping or cleaning machine.

In contrast, the present further development is based on the task of providing an improved carrier or plate for forming a cleaning, sweeping, grinding or polishing plate and corresponding segments for this, which can be mounted on the carrier as simply and intuitively as possible and can also be replaced as easily as possible if necessary . The assembly and/or disassembly of individual segments should be possible without the use of tools, ie without the aid of fastening tools. Furthermore, it is an objective to provide the quickest and easiest possible exchange of segments on the carrier of a disc broom or on the carrier of a corresponding cleaning, sweeping, grinding or polishing disc.

Advantageous configurations

This object is achieved with a central locking system, a support for forming a cleaning, sweeping, grinding or polishing disc or a circular broom, and with a cleaning, sweeping, grinding or polishing device according to one of the preceding claims. Advantageous configurations are the subject matter of dependent patent claims.

According to a first aspect, a central locking system for releasably fixing at least a first cleaning, sweeping, grinding or polishing segment and a second cleaning, sweeping, grinding or polishing segment on a carrier that can be mounted so as to be rotatable with respect to an axis of rotation to form a circular broom or intended to form a cleaning, sweeping, grinding or polishing disc. The central locking system has a zugstabiles central locking member, which, based on the axis of rotation, on a radially outward facing first plant of the first cleaning, sweeping, grinding or polishing segment and on a radially outward facing second plant of the second Cleaning, sweeping, grinding or polishing segment can be brought into radial contact and is designed to exert a radially inwardly directed holding force on the first segment and the second segment.

By means of the tension-stable central locking element, it is possible to fix at least two cleaning, sweeping, grinding or polishing segments on a carrier of a disc broom or on the carrier of a cleaning, grinding or polishing disc. In this way, at least two or a large number of typically identical and/or functionally designed segments can be releasably fixed to the carrier of the disc broom or to the carrier of the cleaning, grinding or polishing disc with a single locking element with stable tension. In particular, several or a large number of cleaning, sweeping, grinding or polishing segments can be attached to the carrier and releasably fixed at the same time with a single central locking element.

It is advantageous here if only a single central locking system for a large number of cleaning, sweeping, grinding or polishing segments is or is provided for each carrier to form a disc broom or to form a cleaning, grinding or polishing disc must in order to detachably fix those cleaning, sweeping, grinding or polishing segments on the carrier.

Due to the fact that the tension-stable central locking element can be brought into contact with a radially outwardly facing first system of the first cleaning, sweeping, grinding or polishing segment and also with a second system of the second cleaning, sweeping, grinding or polishing segment , a radially inwardly directed holding or fixing force can be exerted simultaneously on the first and second cleaning, sweeping, grinding or polishing segments by means of the central locking element with high tensile strength.

Furthermore, it is possible in a particularly simple manner by means of the tension-stable central locking element to fix several or all of the cleaning, sweeping, grinding or polishing segments to a carrier or to detach them from the carrier at the same time and together.

Typically, the central locking member can be converted from a release configuration to a locking configuration and vice versa. In the release configuration of the tension-stable central locking element, this is spaced apart from the radially outward-facing first and second abutments of first and second cleaning, sweeping, grinding or polishing segments.

By transferring from the release configuration to the fixing configuration, the tension-stable central locking element typically comes to rest radially with first and second systems of the first and second cleaning, sweeping, grinding or polishing segment, so that the central locking element typically has a radially inwardly directed holding or can exert fixing force on the relevant cleaning, sweeping, grinding or polishing segments. The pull-stable design of the central locking member is advantageous here. By shortening or reducing the circumference of the central locking element, for example when transferring the central locking element from the release configuration to the fixing configuration, a radially inward holding or fixing force can be exerted on the first and second cleaning, sweeping -, grinding or polishing segment are exercised.

The central locking system can be suitable for almost any number of cleaning, sweeping, grinding or polishing segments and designed accordingly. With the pull-stable central locking element, up to four, up to six, up to eight, up to ten, up to twelve, up to fifteen or even up to sixteen and more individual segments can be easily attached to the carrier of a cleaning, sweeping, grinding or Polishing plate attached and / or fixed.

Based on the radial symmetry of the carrier, the individual segments can typically be arranged adjacent to one another in the circumferential direction on the carrier. The respective radially outward facing abutments of the individual segments are typically similar or widely spaced from the radial center or axis of rotation of the carrier. By means of the tension-stable central locking element enclosing all radially outward-facing systems of all segments, a particularly even mechanical load and/or force distribution can also be achieved on the individual segments, so that each of the individual segments mounted on the carrier can, for example, have a largely identical holding or fixing force on the Carrier can be fixed.

According to a further embodiment of the central locking system, the central locking element has an inner edge directed radially inwards, by means of which the central locking element can enclose the first abutment and the second abutment in the circumferential direction. The inner edge of the central locking member typically mechanically engages a radially outwardly facing abutment surface of the first abutment and the second abutment. Viewed in the radial direction, the central locking element is typically designed to be hollow, so that it can be attached to the first contact radially on the outside in a particularly simple manner and the at least second abutment of the at least first and second segments can easily nestle against or come to rest against.

Typically, the inwardly directed or inwardly pointing inner edge of the central locking element defines an inner cross section or inner diameter of the central locking element, which is larger in the release configuration than a correspondingly designed outer circumference of the first and second contact of the at least first and second cleaning, sweeping , grinding or polishing segments. In the central locking member fixing configuration, the inwardly facing inner edge of the central locking member engages or abuts both the first abutment of the first segment and the second abutment of the second segment to fix the segments at least radially to the carrier.

According to a further embodiment, the central locking element has a structure that is closed in the circumferential direction. A structure of the central locking element that is closed in the circumferential direction enables, in particular, a radial enclosing of all segments provided on the carrier and their respective systems. A structure that is closed in the circumferential direction can in particular provide a high degree of stability and holding power.

According to a further embodiment, the central locking element has a dimensionally stable ring. The ring can be a closed ring or a ring that is open in the circumferential direction. The dimensionally stable ring can in particular be made of a dimensionally stable material, for example a metal such as steel or aluminum. The essentially dimensionally stable ring can be placed around the outer circumference of first and second first and second abutments, each facing radially outwards, of first and second segments or of all other segments provided on the carrier. The dimensionally stable and tension-stable ring then causes a radial fixation of all cleaning, sweeping, grinding or polishing segments arranged with their systems inside the ring. The inner edge of the ring prevents individual segments from breaking out radially outwards, in particular when the carrier fitted with segments or the cleaning, sweeping, grinding or polishing disc is rotated about the axis of rotation.

The dimensionally stable ring can have a U-shaped cross-sectional profile, for example, with the receptacle formed by the U-shaped cross-section pointing radially inwards. The clear width between the opposing legs of the U-shaped cross-sectional profile of the ring can be dimensioned approximately so large that the outer edge of a segment or the outer edge of a segment body can be accommodated therein. In other words, the ring can be dimensioned and configured in such a way that it at least partially surrounds or encloses a radially outer edge of a segment body, in particular in the fixing configuration on the carrier. In this case, the outer edge of the segment body can also form the respective outwardly directed abutment of the respective segment.

In other embodiments, the first and second abutments of the first and second segments can be offset radially inwards from the outer edge of the segment body. This enables the central locking element to be arranged radially on the inside of the outer edge of the cleaning, sweeping, grinding or polishing plate, the outer edge of which can generally collide with third-party objects when a corresponding cleaning, sweeping, grinding or polishing device is used. Relocating the central locking member to an area within the outer edge or periphery of the cleaning, sweeping, sanding, or polishing pad may increase the durability and/or life of the central locking member. Located radially on the inside, it is typically exposed to a lower collision or hazard potential.

In further embodiments or developments thereof, the first and the second abutment of the first and second segment can also be offset axially from the outer edge of the segment or the segment body, for example on the upper side of the segment body and/or protrude axially from it. This enables in particular an arrangement of the central locking system, and consequently the central locking element, on the upper side of the carrier and thus on the side of the carrier facing away from the bristles, the abrasive grain or the fiber structure of the individual segments

The dimensionally stable ring can be designed to be interrupted in the circumferential direction. As far as its inner circumference or its inner cross-section is concerned, it can be configured variably. The ring designed as a central locking element can have a larger inner cross-section or inner diameter in its release configuration than in its fixing configuration.

According to a further embodiment of the central locking system, the central locking element has a flexible strap, a flexible loop or a flexible cable. The flexible and therefore not necessarily dimensionally stable design of the central locking element enables a particularly simple and space-saving as well as intuitive handling of the central locking element on the carrier of the cleaning, sweeping, grinding or polishing disc.

Although the central locking element has a flexible strap, a flexible sling or a flexible cable, it can be designed to be equally stable under tension. Any tensile forces applied to the webbing, sling, or rope at a first portion may be transmitted over and through the webbing, sling, or rope unaltered and unaltered.

The design as a flexible band, as a flexible sling or as a flexible rope also proves to save weight and space.

The band, the sling or the rope, like the previously described dimensionally stable ring, can be brought to bear radially on the outside on the first bearing of the first segment and on the second bearing of the second segment. A shortening or reduction in the effective length of the strap, sling or rope then leads to a corresponding reduction in the inner diameter or the inner cross-section of a strap, sling or rope formed into a circumferential loop, for example, so that a radially inward-pointing holding or Fixing force can be exerted on the respective cleaning, sweeping, grinding or polishing segments.

The design of the central locking member in the form of a flexible belt, a flexible sling or a flexible cable is particularly advantageous for those embodiments of the cleaning, sweeping, grinding or polishing segments which have a first or second system on their radially outward-facing first or second system Have a groove, a notch or a comparable undercut, for example in the form of a hook, into which the tape, the sling or the rope can be threaded or passed.

In this respect, it is conceivable that, for example, a groove or notch running in the circumferential direction is provided on the outer edge of the segments or the respective segment body for receiving the strap, the sling or the cable. Alternatively or additionally, it is conceivable that the segments have an axial projection with an undercut accessible from radially outside, for example on the top or bottom of a respective segment body, into which the band, the loop or the cable can be inserted from radially outside to radially inside . In this way, holding and fixing forces directed radially inwards can be transmitted from the central locking element to the individual cleaning, sweeping, grinding or polishing segments.

According to a further embodiment, the central locking element has a tensioning element, by means of which the effective length or the effective circumference of the central locking element can be changed, in particular can be shortened. The tensioning element serves in particular to transfer the central locking element from the release configuration to the fixing configuration. The tightening member can be provided both in the case of a dimensionally stable ring and in the case of a central locking member which is embodied flexibly, for example as a band, as a sling or as a cable, and can be implemented accordingly. The biasing member may have a first end connected to and fixed to a first portion of the central locking member. Furthermore, the clamping member can be connected or fixed to a second portion of the central locking member with a second end. The tensioning element itself is variable in length or it has a length-changing effect on the central locking element. In the case of a tensioning element variable in length, the distance between the first and second section of the central locking element can be changed as required by actuating the tensioning element accordingly.

In particular, it is provided and within the scope of what is possible that the tensioning element performs a kind of lever function and that, due to the geometric connection of the tensioning element to the central locking element, the forces that can be exerted by the tensioning element on the central locking element in the circumferential direction act radially inward on the systems of at least the first and second Cleaning, sweeping, grinding or polishing segment transferred and possibly also reinforced. In particular, the central locking element can be transferred from the release configuration to the fixing configuration by means of the tensioning element that is connected to it or is in an operative connection with it. By means of the clamping element, corresponding holding and fixing forces can be exerted or introduced, initially acting in the circumferential direction, on the central locking element. Due to the radially inward contact of the central locking element with the first and second or further systems of first and second or further segments, the force originally emanating from the tensioning element can be transferred to the individual segments in a holding and fixing force acting radially inward.

According to a further embodiment, the clamping element has a turnbuckle or a clamping bracket. The turnbuckle or the tension bracket can be variably arranged there, that is to say at different but fixed positions, on the central locking element and fixed thereto. In this respect, a type of pretension can be set by means of a variable fixing or arrangement of the turnbuckle or the tension bracket on the central locking element. The turnbuckle or the clamping bracket also provide a corresponding clamping range. As a result of actuation of the turnbuckle or the clamping bracket, the length of the clamping member, viewed in the circumferential direction, can be changed by a predetermined amount, typically shortened when transferring from the release configuration to the fixing configuration.

The effective length or the effective circumference of the central locking element is typically specified and adapted to the outer circumference of the individual systems of the segments involved in forming the cleaning, sweeping, grinding or polishing disc and their location or position in a final assembly position.

The turnbuckle or the tension bracket can interact with the central locking element configured as a dimensionally stable ring or as a flexible band, as a flexible sling or as a flexible cable, or it can be connected or fixed thereto.

According to a further embodiment, the tightening member has a rotatably mounted spool onto which the flexible band, the flexible sling or the flexible cable can be wound at least in sections. In this case, the spool can in particular be provided with a clutch and/or with a ratchet mechanism. The ratchet mechanism allows rotation of the spool in a first direction and prevents reverse rotation in a second direction. As a result of a rotation of the spool along the first direction specified by the ratchet mechanism, the flexible central locking member is wound further onto the spool, so that a remainder of the strap, sling or cable remaining for enclosing the first and second abutments is effectively shortened will.

The spool can be rotated until the flexible band, the flexible sling or the flexible cable encloses all radially outward-facing systems of all segments contributing to the cleaning, sweeping, grinding or polishing plate and comes into contact with it and/or a radially inward system directed holding force exerts on the segments. The ratchet mechanism prevents the spool from being released automatically or from being unwound in the opposite direction to the first direction of rotation.

Finally, the spool can be provided with a clutch which can be actuated, for example, by an end user, in order to at least temporarily disable the ratchet mechanism. By means of the clutch, the ratchet mechanism can be temporarily overridden and the spool rotated in the opposite second direction. As a result, the central locking member from the fixing configuration can be transferred back into the release configuration and the fixing of the individual segments on Carrier can be solved accordingly. By activating the clutch, the length of the loop formed by the flexible central locking element can be increased and the diameter of the loop increased accordingly, so that the individual segments can be detached from the carrier and removed.

The tensioning element can in particular be arranged radially inwardly or radially inwardly spaced from the outer edge of the carrier on the carrier or can be arranged thereon. An arrangement of the tensioning member spaced apart from the outer edge of the carrier or from the outer edge of the individual segments enables, on the one hand, a relatively short configuration of the central locking element. On the other hand, this causes the tensioning element to be displaced from the radially outer area of the cleaning, sweeping, grinding or polishing plate. During operation of the cleaning, sweeping, grinding or polishing device, it is exposed to far less mechanical wear than would be the case with an arrangement on the outer edge.

According to a further aspect, the present development also relates to a carrier for forming a disc broom or for forming a cleaning, sweeping, grinding or polishing disc. The plate in question can be mounted so that it can rotate with respect to an axis of rotation. The carrier has a carrier disk or plate body with a bottom, with an opposite top and with an outer edge. At least a first cleaning, sweeping, grinding or polishing segment with a first contact pointing radially outwards and at least a second cleaning, sweeping, grinding or polishing segment with a second contact pointing radially outwards can be detached from the underside of the carrier disc arrangeable. The carrier also has a central locking system as described above, or the carrier is provided with a pull-stable central locking element which, in relation to the axis of rotation, can be brought into radial contact with the first contact of the first segment and with the second contact of the second segment and to exert a radial inwardly directed holding and/or fixing force is formed on the first segment and on the second segment. The pull-stable central locking element can be arranged on the carrier or assigned to the carrier. It can be permanently connected to the carrier or detachably arranged on the carrier.

The tension-stable central locking element of the carrier can be the central locking element previously described in connection with the central locking system. In this respect, all the features, properties and advantages of the central locking element described above also apply equally to the carrier described here with such a tension-stable central locking element.

According to a further embodiment, the central locking element is arranged on the upper side or on the outer edge of the carrier disc or it can be arranged accordingly. In an arrangement on the outer edge of the carrier disk, the central locking element can have a dimensionally stable ring, which encloses the segments arranged on the carrier, for example by means of a U-shaped profile at its outer edge. In this case, the central locking element can only enclose, at least in certain areas, the respective abutments of the segments arranged on the carrier, which face radially outwards.

In other configurations it is conceivable that the central locking element also encloses or encompasses the outer edge of the carrier disk in addition to the radially outwardly facing abutments or outer surfaces of the cleaning, sweeping, grinding or polishing segments. With such a configuration, the radially outer areas or edges of the cleaning, sweeping, grinding or polishing segments can also be secured and fixed axially on the carrier or on its carrier disk by means of the central locking member. In this respect, the central locking element has a dual function with regard to a combined axial and radial fixation of segments.

By arranging the central locking element on the outer edge of the carrier disc and/or on the radially outer edges of the cleaning, sweeping, grinding or polishing segments arranged thereon, a central locking system that is comparatively flat or low in the axial direction can be implemented. This is particularly advantageous if the carrier or its carrier disk is attached to a machine and if the area above the carrier should be difficult or hardly accessible due to structural conditions.

With an arrangement of the central locking element on the upper side of the carrier disk, an arrangement of the central locking element offset radially from the outer edge of the carrier disk can be implemented. In this case, it is provided in particular that the central locking element is offset radially inwards at a predetermined distance from the outer edge of the carrier disc. The central locking element can be shifted inwards from the radially outer area of the carrier and the carrier disk. During operation of a cleaning, sweeping, grinding or polishing device equipped with the carrier and with several segments, damage and functional impairment of the central locking member and the central locking system can occur Collisions of the wearer with third-party objects can be largely avoided. The central locking system and its central locking element can be kept largely free of damage due to the arrangement offset radially inwards with respect to the outer edge of the carrier disc.

According to a further embodiment, in the area of the first cleaning, sweeping, grinding or polishing segment, the carrier disc has a recess designed as a through opening for a securing element protruding from an upper side of the first cleaning, sweeping, grinding or polishing segment. The first contact that can be brought into contact with the central locking element is formed on the securing element. The securing element of the cleaning, sweeping, grinding or polishing segment protrudes so far from the top of the segment body that it penetrates the recess or the through-opening of the carrier disc axially, so that a region of the securing element protruding from the top of the carrier disc is connected to the central locking element can be engaged.

Passing through the recess on the carrier side by means of the securing element protruding upwards from the upper side of the segment enables the central locking element or the entire central locking system to be arranged radially inward relative to the outer edge of the carrier disk. The securing element can, for example, have a hook which is open radially outward and which forms an undercut region into which the central locking element can be inserted, directed radially inward, and brought into contact with it, directed radially inward.

However, the securing element can also be designed in the form of a projection protruding upwards from the segment body, which has a groove or similar undercut for the central locking element, for example for the flexible strap, the flexible loop or the flexible cable, on a radially outward-facing outside .

According to a further embodiment, the carrier has a carrier guide which is designed to correspond to a segment guide configured on the cleaning, sweeping, grinding or polishing segment, in order to move the cleaning, sweeping, grinding or polishing segment by means of a displacement movement directed radially inwards to move relative to the carrier in a final assembly position on the carrier. In the final assembly position, the cleaning, sweeping, grinding or polishing segment can be fixed by means of the central locking element. In particular all cleaning, sweeping, grinding or polishing segments arranged on the carrier and typically of the same or identical design can be fixed together on the carrier by means of the central locking member. The central locking element encloses the first system of the first segment, the second system of the second segment, the third system of a third segment, etc. At least the central locking element encloses a radially outwardly directed system of each cleaning, sweeping, grinding or polishing segment.

The carrier guide and the segment guide can have mutually corresponding or complementary profiles, by means of which each cleaning, sweeping, grinding or polishing segment can be mounted radially displaceably on the carrier and can be displaced along the carrier guide into the final assembly position.

According to a further embodiment, at least a first end stop for the cleaning, sweeping, grinding or polishing segment and a second end stop for the second cleaning, sweeping, grinding or polishing segment are provided or formed on the carrier disc or carrier. The first cleaning, sweeping, grinding or polishing segment can be fixed at the first end stop and the second cleaning, sweeping, grinding or polishing segment can be fixed at the second end stop by means of the central locking element with high tension stability. In particular, all cleaning, sweeping, grinding or polishing segments that come into contact with a carrier-side end stop provided for this purpose can be fixed radially by means of the central locking element. An axial and/or tangential fixation can be provided in particular via the carrier and segment guides of the carrier and the respective segments, which are in engagement with one another.

The end stop provided on the carrier or its carrier disk can have a radially outwardly directed stop surface or stop contour, which can be brought into radial contact with a radially inner counter-stop surface of the segment. By means of the central locking member, which typically exerts a radially inwardly directed holding or fixing force on the segment or on all segments, the relevant segment or all segments can be held in the contact position at the respective end stop.

According to a further embodiment, it is conceivable that the several segments form mutual end stops with one another. This can be achieved, in particular, if the side edges lying on the outside in the circumferential direction of adjacent segments or segment bodies that abut one another in the circumferential direction are radially inward Directed displacement movement relative to the carrier directly come to rest in the circumferential direction. This is the case in particular in the case of segment bodies designed in the manner of a piece of cake or in the manner of a circle segment or circular ring segment. As a result of a radially inward displacement of segments or segment bodies that are adjacent to one another in the circumferential direction, the side edges or side walls of the segment bodies that come into direct contact with one another act as an end stop if they come into contact with a side wall or side edge of a respectively adjacently arranged segment body that has a corresponding design.

Instead of a carrier-side end stop pointing radially outwards, it is also conceivable that, for example, the carrier guide tapers radially inwards, for example conically tapering, and that the segments to be arranged thereon with their segment guide or their segment bodies have a corresponding or complementary conical or tapering structure on their have opposite outer edges in the circumferential direction. As a result of a radially inward displacement movement of the segments or the segment bodies relative to the carrier, an end stop configuration acting in the radial direction can likewise be achieved.

According to a further embodiment, the recess configured on or in the carrier disc can also function as an end stop. The recess can namely have a limit directed radially inwards, against which the axially upwardly protruding securing element of the respective segment comes to rest directly. In this respect, the securing element of each segment can be brought into contact with a radially inner delimitation of the recess of the carrier disk and thereby provide a radially inner stop or end stop for the respective segment on the carrier. The recess also has a dual function, namely, on the one hand, to shift a radially outwardly directed contact of a segment onto the upper side of the carrier and, on the other hand, to form a radial end stop for the relevant segment.

According to a further aspect, the present further development relates to a cleaning, sweeping, grinding or polishing device which has a carrier as described above and a first cleaning, sweeping, grinding or polishing segment and at least a second cleaning, sweeping, grinding or or has a polishing segment. The individual segments each have a segment body, which is typically formed in the manner of a partial circle or a partial circular ring. The individual cleaning, sweeping, grinding or polishing segments typically form a circular ring and, together with the carrier or its carrier disc a disc broom or, depending on the design of the segments, also a grinding, polishing or cleaning disc, in particular for processing or cleaning paved surfaces or floors.

The cleaning, sweeping, grinding or polishing segments typically have an essentially flat segment body designed in the manner of a partial circle or segment of a circle, on the underside of which several bristles, an abrasive grain or a fiber structure are arranged or formed. Depending on the design of the segment, it is a cleaning segment, a sweeping segment, a grinding segment or a polishing segment to form a corresponding cleaning, sweeping, grinding or polishing disc.

The cleaning, sweeping, grinding or polishing device is designed in particular as a circular broom for a street sweeper. Depending on the design, the carrier can have a diameter of more than 40 cm, more than 50 cm, more than 60 cm or even more than 80 cm.

According to a further embodiment of the cleaning, sweeping, grinding or polishing device, it has at least one end stop against which the cleaning, sweeping, grinding or polishing segments come into contact in the radial direction or in the circumferential direction when they reach a radially inner final assembly position on the carrier reach. The central locking element is designed here to press the first and the at least second cleaning, sweeping, grinding or polishing segment against the end stop or to hold them in a contact position against the end stop.

The end stop can be configured on the carrier or its carrier disc. It can, for example, protrude axially from an underside of the carrier disc and have one or more radially outwardly directed stop surfaces for the individual segments. Furthermore, several individual end stops are conceivable, each with a radially outward-pointing stop surface for the corresponding radially inward-pointing counter-stop surfaces of the respective segments. However, the end stop can also be formed in or by a cutout in the carrier disk designed as a through opening, which can typically be pushed through by a securing element of a segment.

According to a further embodiment, the individual cleaning, sweeping, grinding or polishing segments that can be arranged on the carrier can themselves, typically with their in the circumferential direction external side edges form mutual end stops. This is possible and intended in particular when the side edges of the respective segments which are on the outside in the circumferential direction extend approximately in the radial direction.

According to a further aspect, the present development also relates to a cleaning, sweeping, grinding or polishing segment for arrangement on a carrier to form a disc broom or to form a cleaning, sweeping, grinding or polishing disc. The cleaning, sweeping, grinding or polishing segment has an essentially planar segment body. The segment body has a bottom and an opposite top. The segment body is designed to be arranged on an underside of a carrier described above or a carrier plate described above. The underside of the segment body has either several bristles, an abrasive grain or a fiber structure in order to function accordingly as a sweeping, grinding or polishing segment for the formation of a corresponding cleaning, sweeping, grinding or polishing disc.

A securing element is arranged or formed on the upper side of the segment body. In relation to the later arrangement on the carrier to be mounted rotatably with respect to an axis, the securing element protrudes in the axial direction from the upper side of the segment body. In particular, the securing element extends along a surface normal of the upper side of the segment body.

The securing element is typically located at a distance from the radially outer outer edge of the segment body. It is preferably also located tangentially or circumferentially spaced from the lateral or circumferentially outer side edges of the segment body.

Based on the intended arrangement on the carrier to be mounted with respect to an axis of rotation, the securing element has an undercut or it forms an undercut which is accessible radially from the outside and into which a previously described central locking element can be inserted. The undercut of the securing element has an opening pointing radially outward, so that the central locking element can be inserted into the securing element from radially outside to radially inside, in order to be able to exert a holding or fixing force directed radially inward on the securing element and the segment body connected to it .

The cleaning, sweeping, grinding or polishing segment is provided in particular for a central locking system as described above as well as for a carrier as described above or for a cleaning, sweeping, grinding or polishing device as described above. In this respect, all of the features, advantages and possible applications presented for the objects described above also apply equally to the cleaning, sweeping, grinding or polishing segment; and vice versa.

Finally, according to a further aspect, a disc broom or a cleaning, grinding or polishing disc is provided for arrangement on a cleaning, sweeping or polishing machine, which has a carrier described above and at least one segment arranged thereon. The disc broom is basically for use in street and sidewalk cleaning, a cleaning, grinding or polishing disc is preferably used for interior cleaning.

Instead of a brush segment equipped with bristles, it is also conceivable that no bristles are arranged on the underside of the segment body, but only a cleaning structure, for example in the form of a woven fabric, a knitted fabric or an abrasive grain, which comes into contact with a surface to be cleaned. The arrangement of bristles protruding from the underside of the segmented body is purely exemplary and, in principle, the segmented body can also be designed as a segment of a grinding or polishing segment, with the segmented body having a grinding, polishing or abrasive surface on its underside.

It should also be noted that all the features and advantages described in relation to a segment, such as a brush segment, also apply in the same or analogous manner to the carrier of the circular broom and to the circular broom; and vice versa.

Brief description of the figures

Fig. 1

eine schematische Darstellung einer Reinigungs-, Kehr-, Schleif- oder Poliervorrichtung mit einem Zentralverriegelungssystem und mit mehreren hieran angeordneten Reinigungs-, Kehr-, Schleif- oder Poliersegmenten,

Fig. 2

eine perspektivische Darstellung der Vorrichtung gemäß Fig. 1,

Fig. 3

eine stark vereinfachte Darstellung eines Querschnitts durch die Vorrichtung gemäß Fig. 2,

Fig. 4

eine weitere stark vereinfachte Darstellung einer abgewandelten Ausführung der Vorrichtung gemäß Fig. 2,

Fig. 5

eine Darstellung einer weiteren Ausführungsform einer Reinigungs-, Kehr-, Schleif- oder Poliervorrichtung von oben betrachtet,

Fig. 6

eine Explosionsdarstellung sämtlicher Einzelteile der Vorrichtung gemäß Fig. 5,

Fig. 7

eine Querschnittsdarstellung durch den Träger und die Segmente der Vorrichtung gemäß der Fig. 5 und 6,

Fig. 8

eine vergrößerte Darstellung eines Ausschnitts der Fig. 7,

Fig. 9

eine isolierte Darstellung einer an der Unterseite der Trägerscheibe anzuordnenden Halterung für mehrere Segmente,

Fig. 10

eine isolierte Darstellung eines Segmentkörpers zur Anordnung an der Halterung gemäß Fig. 9,

Fig. 11

eine weitere perspektivische Darstellung der Vorrichtung gemäß Fig. 5,

Fig. 12

einen vergrößerten Ausschnitt der Vorrichtung gemäß Fig. 11,

Fig. 13

eine weitere Ausgestaltung eines Zentralverriegelungssystems für eine Reinigungs-, Kehr-, Schleif- oder Poliervorrichtung,

Fig. 14

eine weitere Ausführung einer Reinigungs-, Kehr-, Schleif- oder Poliervorrichtung,

Fig. 15

eine Explosionsdarstellung der Einzelteile der Reinigungs-, Kehr-, Schleif- oder Poliervorrichtung gemäß Fig. 14,

Fig. 16

eine isolierte perspektivische Darstellung eines Segments der Ausführungsform gemäß Fig. 14 und 15,

Fig. 17

eine Draufsicht von außen auf einen Segmentkörper gemäß Fig. 16,

Fig. 18

einen Querschnitt durch den Segmentkörper gemäß Fig. 17 in Endmontagestellung am zugehörigen Träger und

Fig. 19

eine vergrößerte Darstellung eines Ausschnitts der Fig. 14.

Further features, goals and advantages of the present invention are explained in the following description of an exemplary embodiment with reference to the figures. All features disclosed for one exemplary embodiment also apply equally to other exemplary embodiments as disclosed and combined herewith, insofar as this is technically possible. Here show:

1

a schematic representation of a cleaning, sweeping, grinding or polishing device with a central locking system and with several cleaning, sweeping, grinding or polishing segments arranged thereon,

2

a perspective view of the device according to FIG 1 ,

3

a highly simplified representation of a cross section through the device according to FIG 2 ,

4

a further greatly simplified representation of a modified embodiment of the device according to FIG 2 ,

figure 5

a representation of a further embodiment of a cleaning, sweeping, grinding or polishing device viewed from above,

6

according to an exploded view of all individual parts of the device figure 5 ,

7

a cross-sectional view through the carrier and the segments of the device according to the figure 5 and 6 ,

8

an enlarged view of a section of the 7 ,

9

an isolated representation of a holder for several segments to be arranged on the underside of the carrier disc,

10

an isolated representation of a segment body for arrangement on the bracket according to FIG 9 ,

11

a further perspective view of the device according to FIG figure 5 ,

12

according to an enlarged section of the device 11 ,

13

a further embodiment of a central locking system for a cleaning, sweeping, grinding or polishing device,

14

another version of a cleaning, sweeping, grinding or polishing device,

15

according to an exploded view of the individual parts of the cleaning, sweeping, grinding or polishing device 14 ,

16

an isolated perspective view of a segment according to the embodiment 14 and 15 ,

17

a plan view from the outside of a segment body according to FIG 16 ,

18

according to a cross section through the segment body 17 in the final assembly position on the associated carrier and

19

an enlarged view of a section of the 14 .

Detailed description

In the Figures 1 to 5 an example of a cleaning, sweeping, grinding or polishing device 10 is shown schematically, which in the present case is designed as a circular broom. The device 10 has an essentially planar carrier 12 with a carrier disc 14 . The carrier disk 14 typically has a central through-opening 13, for example for receiving a shaft provided for driving the carrier 12. Consequently, the carrier 12 and the entire sweeping or cleaning device 10 can be mounted so as to be rotatable with respect to an axis of rotation 1 on a machine, for example on a sweeper, a polishing or grinding machine.

The cleaning, sweeping, grinding or polishing device has a plurality of segments 40, 40', which are each designed in the manner of part circles or part circular rings. The segments 40, 40' can typically be releasably fastened to an underside 15 of the carrier disk 14. The individual segments 40, 40' each have a segment body 42 which is essentially planar or plate-like. The segment bodies 42 have an underside 41 and an opposite upper side 49 . In the exemplary embodiment shown, individual bristles 6 protrude downwards in the axial direction on the underside 41 of the segment bodies 42 . The bristles 6 can also extend obliquely outwards at a predetermined angle, that is to say obliquely radially outwards. The free end of the bristles 6 lies in an axial projection, such as in figure 5 shown radially outward of an outer edge 17 of the carrier 12.

The individual segments have an inner edge 44 lying radially on the inside and an outer edge 46 lying opposite. Lateral side edges 43, 45 extend between the inner edge 44 and the outer edge. As in FIG 1 shown, for example eight segments 40, 40' can be arranged on the underside 15 of the carrier 12 to form a largely closed ring. Each individual segment 40 can, for example, interact with a carrier guide configured on the carrier by means of a segment guide to be described in greater detail, in order to fasten and fix the respective segment 40 on the carrier 12 with respect to the circumferential direction u and with respect to the axial direction Z.

A central locking system 102 is provided for radially fixing at least a first segment 40 and a second segment 40'. The central locking system 102 has a central locking member 100 which can be brought into contact with a first radially outward-facing first contact 101 of a first segment 40 and with a second radially outward-facing contact 101' of a second segment 40 and for exercising a radially inward directed holding or fixing force on the first segment 40 and the second segment 40 'is formed. The central locking element 100 can in particular interact with all segments 40, 40' arranged on the carrier 12 in order to secure and fix all segments 40, 40' radially on the carrier 12.

The central locking member 100 has an inner edge 105, by means of which all segments 40, 40' can be brought into radial contact with the radially outward-facing systems 101, 101' at the same time in order to exert a corresponding radially inward-directed holding and fixing force on all segments 40, 40' to exercise.

The central locking member 100 has in the representation according to FIG Figures 1 to 5 a structure 110 which is closed in the circumferential direction u and which extends in the circumferential direction around all segments 40, 40' or around parts thereof.

The circumference of the central locking element 100 is variably adjustable, preferably continuously adjustable, in order in particular to variably change the inner cross-section of its inner edge 105 . In this respect, the central locking element 100 can have a tensioning element 120 or can be coupled to a tensioning element 120 . By means of the clamping element, the central locking element 100 is made of an in 1 shown release configuration, in which it has an inside diameter or an inside cross-section which is larger than the outside diameter or outside cross-section of all segments 40, 40' in an in 1 Fixing configuration 100' shown in dashed lines can be converted, in which the central locking element 100 on the segment bodies 42 or on the radially outward-facing systems 101, 101' of the segments 40, 40' bears radially.

The clamping member 120 can be designed, for example, in the form of a clamping bracket 122 or have a clamping bracket, as is the case, for example, in FIG Figures 1, 2 and 5 is shown. The clamping member 120 can be arranged with a first end 125 fixed to a first section 126 of the central locking member 100 and fixed thereto. A second end 127 of the clamping member 120 can be fixedly connected to a second section 128 of the central locking member 100, with first and second sections 126, 128 of the central locking member 100 being spaced apart from one another in the circumferential direction u. The tensioning member 120 can, for example, have an actuating lever 129 which is connected to a tensioning bracket 122 in a pivotable but tension-resistant manner. The operating lever 129 can be connected to the end section 128 . The clamping bracket can engage with a hook 123 provided at the first end 125, so that by actuating, for example by depressing the actuating lever 129 via the clamping element 120, a tensile force directed towards one another can be exerted between the first and the second section 126, 128 of the central locking element 100 . The consequence of this is that the distance between the sections 126, 128 is shortened, which results in a reduction in the circumference of the central locking element 100 and, consequently, in a reduction in its diameter or its internal cross section.

Im in the Figures 1 to 4 shown embodiment, the central locking member 100 on a dimensionally stable ring 111, which is designed in cross-section U-profile. The profile of the ring 111 can be dimensioned in such a way that the radially outer edges 46 of the individual segments 40 can be inserted into the U-profile of the ring 111 .

In this respect, the ring 11, which can be designed as a so-called barrel ring, for example, can accommodate the entire outer edges 46 of all segments 40 and not only fix them in the radial direction, but also stabilize them in the axial direction as soon as the ring assumes its fixing configuration 100', such as this one, for example in the 1 and 3 is shown in dashed lines.

Here, as in the Figures 1 to 3 shown schematically, it can be provided that the outer edges 46 of the individual segments 40, 40' protrude from the outer edge 17 of the carrier 12. Radially on the inside, as shown schematically in 3 shown, an end stop 90 for each of the segments 40, 40' can be provided on the carrier 12. The end stop 90 can in particular protrude axially from the underside 15 of the carrier disc 14 and radially limit inward insertion or assembly movement of the individual segments 40, 40 'radially inward.

Instead of such end stops 90, it is also conceivable for the side edges 43, 45 of segments 40, 40' arranged adjacent in the circumferential direction to reach the contact position alternately in the circumferential direction when a final assembly position on the carrier 12 is reached. Due to the approximately conical design of the segment bodies 42, the side edges 43, 45 of segments 40, 40' that are adjacent in the circumferential direction and come to rest alternately in the circumferential direction also represent a kind of end stop in the 3 indicated carrier-side end stops 90 are not absolutely necessary.

In the alternative embodiment according to 4 It is provided that the dimensionally stable ring 111 of the central locking member 100 is dimensioned in the axial direction such that its radially inwardly open U-profile-like cross-sectional contour is designed both to accommodate the outer edge 46 of the segment body 42 and to accommodate the outer edge 17 of the carrier disk 14. In this way, by means of the central locking member 100, an axial fixation of all segments 40, 40' on the support 12 can also be provided at the edge.

Instead of a U-profile-like, dimensionally stable ring 111, the other way round, a groove running in the circumferential direction can be provided in the outer edges 46 of the individual segments, in which groove a circumferential central locking member 100 can be inserted or received. It is conceivable to design the central locking element as an encircling band-like ring, as a flexible band, as a flexible sling or flexible cable, which runs in a radially outwardly open groove in the outer edge 46 of the individual segments 40, 40'.

In the figure 5 , 11 and 12 Another embodiment of the central locking system 102 is shown. Here, too, a dimensionally stable ring 111 is provided. However, this is not on the radially outer outer edges 46 of the segment body 42, but on securing elements 80 of the individual segments 40, 40 ', which protrude from the top 49 of the individual segment body 42 upwards, ie relative to the axis of rotation 1 axially. The securing elements 80 have, as in particular in 6 shown, a hook-like shape. In particular, they can be designed as U-shaped safety hooks 86, which are designed to be open radially outward and are thus designed to accommodate a central locking member 100 that can be moved radially from the outside to the radial inside.

For each segment 40, the carrier 12 or the carrier disk 14 has a recess 18 designed as a through-opening. In the embodiment of Figures 5 to 13 those recesses 18 extend to the outer edge 17 of the carrier disk. They are in the form of recesses 18 on the edge, so to speak. In this respect, the individual segments 40, 40' can be attached to the carrier along a radially inward displacement movement with their upper side 49 sliding along the underside 15 of the carrier 12, with the securing elements 80 projecting upwards being guided radially inwards into the recess 18. The radially inner inner edge of each recess 18 can also function as an end stop 90 for the individual segments. As in particular in the enlarged view according to 12 shown, the ring 111 of the central locking member 100 can have a radially inwardly directed edge fold 114 which can be inserted with a precise fit into the outwardly open securing hooks 86 of the individual securing elements 80 . By actuating the clamping element 120, the inside diameter or the inside cross section of the ring 111 can be reduced in such a way that the ring 111 exerts a holding force directed radially inward on the securing elements 80 and thus on the segment bodies 42 connected thereto.

The securing elements 80 or the securing hooks 86 form a radially outwardly directed abutment 101 for a respective segment 40 which can interact with the central locking member 100 .

Since the securing hooks 86 also enclose the bevel 114 in the axial direction, an axial securing for the individual segments 40, 40' can be achieved in the same way.

In 13 a further embodiment of a central locking system 102 with a further variant of a central locking member 100 is shown. The arrangement of the segments 40 on the carrier 12 essentially corresponds to that of FIG Figures 5 to 12 . Instead of a dimensionally stable ring 11, however, the central locking element 100 has a flexible strap 112 or a flexible cable 115 here. Here, too, the flexible central locking element 100 has a closed structure 110 and can be placed around all the securing elements 80, optionally around their securing hooks 86.

In order to convert the central locking element 100 from a release configuration into a fixing configuration and to exert a holding or fixing force directed radially inwards on all segments 40, 40', the flexible central locking element 100 can be 13 may likewise be provided with a tendon 120 or structurally coupled thereto. In principle, the clamping element 120 can also be designed as a clamp or as a turnbuckle. In the embodiments of 13 and 14 the tensioning member 120 has a rotatably mounted spool 124 onto which the flexible central locking member, and consequently the cable 115 or the belt 112, can be wound up.

In particular, the spool 124 can be provided with a ratchet mechanism and a clutch or have a ratchet mechanism and a clutch. A directional lock for the spool can be implemented by means of the ratchet mechanism. In particular, by means of the ratchet mechanism, the spool can be rotated in a first direction in which the flexible central locking member 100 is wound onto the spool 124 . The ratchet mechanism provides a rotation lock for the spool in the opposite direction, ie in a second direction of rotation. That is, the spool 124 can only be rotated along the first direction, that is, in the winding direction, in order to exert a tension on the central locking element 100 that is stable under tension.

The spool 124 may also be provided with a clutch operable by the end user to temporarily override or disable the ratchet mechanism, for example. By actuating the clutch, the spool can be moved counter to the winding direction, i.e. in a second direction of rotation, in particular in order to convert the central locking element 100 from the tensioned fixing configuration into the relaxed release configuration, in which a corresponding radially inwardly directed holding and fixing force is reduced or cancelled.

In the further embodiment of individual segments according to Figures 15 to 19 are formed or provided on the top 49 of the segments 40 or the respective segment body upwardly protruding projections 61. Each segment 40 has a projection 61 that protrudes upwards from the upper side 49 and, like the safety hooks 86 described above, passes through a recess 18 designed as a through opening. The projection 61 of the segment 40 is located radially on the inside of the outer edge 46 of the segment 40. In particular, it can adjoin the inner edge 44 of the segment body 42. The area of the projection 61 protruding axially from the upper side 49 has a rear side 65 facing radially outwards, which at the same time acts as an abutment 101 for the central locking element 100 .

In the example in 14 and 19 In the final assembly position shown, the central locking member 100 can be guided radially outside of all the projections 61 of segments 40, 40', which extend through the corresponding recesses 18 of the carrier 12 from below.

By exerting a clamping force and by contracting the flexible central locking element 100, a holding and fixing force directed radially inwards can be exerted on all projections 61 of the segments 40, 40' arranged on the carrier 12. For secure guidance and retention of the flexible central locking element 100 on the projections 61, the projections 61 each have a groove 103 on their radially outward-facing rear side 65, which forms an undercut for receiving the strap 112 or the cable 115. A head section 67 of the projection 61 that protrudes radially outward beyond the groove 103 can also enclose the central locking element 100 axially, so that the central locking element can provide not only a radial but also an axial fixation for the respective segment 40, 40′ on the carrier 12.

The provision of at least one securing element 80 on the top 49 of each segment 40 or segment body 42 makes it possible to arrange the central locking element 100 on the top 49 of the carrier 12 . In this way, an arrangement of the central locking element 100 on the carrier 12 that is displaced radially inwards in relation to the outer edge 17 is also possible. During operation of the cleaning, sweeping, grinding or polishing device 10, the central locking element 100 and the optional tensioning element 120 are located outside the working area of the cleaning, sweeping, grinding or polishing device 10. The central locking element 100 and/or the tensioning element 120 can thus be protected particularly well and easily against mechanical damage. In addition, the central locking element 100 arranged on the upper side 49 and a corresponding tensioning element 120 for replacing individual segments 40, 40' are particularly easily and intuitively accessible. In order to replace individual segments, it is not absolutely necessary to dismantle or remove the carrier 12 from a machine that usually drives the carrier.

The mounting and management of individual segments on a carrier 12 is shown below using the example of Figures 14 to 19 explained in more detail.

The segment bodies 42 arranged on the underside 15 of the carrier 12 adjoin one another in the circumferential direction u and complement one another to form a full circle or a circular ring when they are arranged on the carrier 12 as intended. The carrier 12 has, for example, a circular or ring-shaped, largely planar carrier disk 14 . On the carrier 12, in particular in its carrier disk 14, several so-called carrier guides 130 are provided. The carrier guides 130 each have a recess 18 designed as a through opening, which extends in the longitudinal direction, in the present case along the radial direction r of the carrier disk 14 . Complementary to the carrier guides 130 each of the segments has a segment guide 60 . In the present case, the projections 61 already mentioned belong to the segment guides 60 or are formed by them.

The projection 61 can be inserted or pushed into the carrier guide 130 in the longitudinal direction, that is to say in the radial direction r. In the present case, the segment guides 60 are arranged radially on the inside, on the inner edge 44 of the segments. However, they can also be arranged at a radial distance from the inner edge 44 . The projection 61, and therefore the segment guide 60, is located, in relation to the circumferential direction u, centered on the top 49 of each segment 40.

A plurality of carrier guides 130 with recesses 18 extending longitudinally in the radial direction are distributed over the carrier 12 . The projection 61 of each segment is dimensioned and designed in such a way that it penetrates the recess 18 on the carrier 12 in the axial direction z. The recesses 18 each have a first side edge 132 and an opposite second side edge 133 . The side edges 132, 133 can also be considered or referred to as side walls. The side edges 132, 133 extend approximately parallel to the longitudinal axis of the respective recess 18. On the radially inner side, the side edges 132, 133 merge into an end face 135, which extends essentially in the circumferential direction. The end face 135 forms a radial end stop 90.

The end stop 90 can, as for example in 15 shown, can optionally be provided with a projection 137 projecting radially outwards, namely into the recess 18 . The projection 137 can taper or taper towards its free end. The projection 137 forms a mechanical coding 136 here. It is designed to complement a mechanical counter-coding 76 on a front side 64 of the projection 61 of the segment guide 60 . The counter-coding 76 has a recess or a receptacle 77 for the projection 137 . By means of mutually complementary coding 136 and counter-coding 76, an incorrect or unsuitable assembly of segments can be largely avoided. Only those segments 40 that are intended or approved for a specific carrier 14 can be arranged as intended on the carrier. On the other hand, assembly is not possible for other, unsuitable segments that have a correspondingly unsuitable coding. The segment body 42 can also have a mechanical coding 52 in the form of a corresponding receptacle or notch, axially aligned with the receptacle 77 of the counter-coding.

Irrespective of a coding 136 and counter-coding 76 , the cutout 18 has a receiving widening 138 opposite the end stop 90 . The cutout 31 transitions into the widened receiving area 138 in particular in the longitudinal direction and radially outwards. The receiving widening 138 has a first side edge 148 and a second side edge 149 . The first side edge 148 may extend substantially parallel to the first side edge 132 . The second side edge 149 can extend substantially parallel to the second side edge 133 . The radially outer end of the receiving enlargement 138 is provided with an end face 147 which forms a mechanical connection between the radially outer ends of the first and second side edges 148 , 149 . In this respect, the carrier 12 can be designed to be continuous and free of recesses at its outer edge 17 . Any risk of injury, which could tend to emanate from such recesses, can be reduced in this way and at the same time the mechanical stability of the carrier 12 and the carrier disc 14 can be increased.

The segment guide 60 or the projection is designed and dimensioned in such a way that it can be passed axially from below through the carrier 12 in the area of the widening of the receptacle and can then be displaced in the radial direction inwards into the area of the recess that tapers in the circumferential direction u, in which the segment guide is the axial direction z and the circumferential direction u is positively fixed to the carrier.

The clear width between opposite side edges 132, 133 is dimensioned such that a groove provided on the lateral outer edge of the projection 61 that can be inserted into the recess 18 can be inserted into the intermediate space between the side edges 132, 133.

As in particular in the Figures 16 to 18 As shown, the projection 61 has a neck portion 66 and a head portion 67 . The projection 61 extends in the axial direction z from a base section 158. The base section 158 can be part of the projection 61. However, the base section 158 can also be embedded flush in the segment body 42 or formed as part of the segment body 42 . The base portion 158 of the projection 61 can be structurally as an integral component or as an integral part or section of the segment body 42, while only the neck section 66 and the head section 67 protrude axially from the upper side 49 of the segment body 42.

The head section 67 and the base section 158 or the segment body 42 are widened compared to a cross section of the neck section 66 . As such, the head portion 67 and base portion 158 protrude from opposite outer sides 62, 63 of the neck portion 66. The clear width between the opposite side edges 132, 133 corresponds approximately to the cross section of the neck section 66 between the opposite outer sides 62, 63 Widespread segment bodies 42 can form a kind of double T-profile, which can be inserted in the longitudinal direction into the area between the opposite side edges 132, 133 of the recess 18 until a front side 64 of the projection 61 on the end stop 90 or on the end face 135 of the recess 18 reached the plant.

On the rear side 65 of the projection 61, the radially outward-pointing system 101 for the central locking member 100 is provided. In particular, a flexible central locking element 100 can come into contact with a groove 103 formed on the rear side 65 of the projection 61 and thus exert a holding or fixing force directed radially inwards on the segment 40 .

The rear side 65 functions as a securing element 80 or as a system 101 that interacts with the central locking element and ensures that the projection 61, and therefore the entire segment guide 60 and the segment 40 connected thereto, are fixed to the carrier 12 in the radial direction.

The projection 61 can be designed in one piece with the carrier body 42, but it can also, as in FIG 15 indicated to be attached as a separate component to the top 49 of the segment 40 . The projection 61 can be fastened to the upper side 49 as a mounting plate 156, for example. The mounting plate 156 or the projection 61 and segment body 42 can be screwed together, for example. This enables the projection 61 and segment body 42 to be produced separately. Both the mounting plate 156 and the projection 61 under the segment body 42 can each be cut out separately from a blank, cut off from a blank or designed accordingly. A material consumption can in the separate provision of the mounting plate 156 and the segment body 42 in Be significantly reduced compared to a milling of the entire segment 40 from a blank.

The multi-part configuration can prove to be advantageous in particular for the production of the undercut(s) formed by the outer sides 62, 63 of the neck section 66.

The head section 67 has outer outer edges 68, 69, which in FIG 18 assembly position shown in cross section outside of the recess 18 lie. In this respect, a first underside 70 of the head section 67 is formed adjacent to the first outer edge 68 of the head section 67 and faces the base section 158 and the first outer side 62 of the neck section 66 . On the opposite side, ie adjacent to the second outer edge 69 , the head section 67 has a second underside 72 which faces the second outer side 63 and the top side of the base section 158 . The clear distance between the undersides 70, 72 and the top 49 of the base section 158 or the segment body 42 essentially corresponds to the material thickness of the carrier 12 or the carrier disk 14.

The clear distance between the upper side 49 and the two undersides 70, 72 can be slightly larger than the material thickness of the carrier disc 14, ie than the axial thickness or extension of the side edges 132, 133. This enables a particularly simple, smooth, sliding guidance of the projection 61 on the elongated recess 18 . The projection 61, and therefore the mounting plate 156, has an essentially cuboid shape with the two lateral indentations in the area of the outer sides 62, 63 of the tapered neck section 66 adjoining the upper side 49 of the segment body 42. Instead of a rectangular or square projection 61 shown here, circular projections are also conceivable, in which case the first and second underside 70, 72 and also the first and second outer side 62, 63 can be part of a single circumferential outer side.

Another way of guiding and fixing several segments 40 on the underside 15 of the carrier 12 is in the exemplary embodiment Figures 6 to 10 shown.

In this case, a plurality of so-called carrier guides 37 are arranged or formed on the underside 15 of the carrier 12, which extend in the radial direction in relation to the axis of rotation 1. Complementary to the example in figures 6 and 8th Carrier guides 37 shown each of the segments 40, based on the axis of rotation 1 of the carrier 12 and adjoining a radially inner inner edge 44 has a segment guide 47 extending in the radial direction. The segment guide 47 is typically located at a distance from a side edge 43, 44 of the respective segment body 42 that is on the outside in relation to the circumferential direction u. The segment guide 47 is designed to interact with the carrier guide 37 provided on the carrier for arranging the segment 40 on the carrier 12.

In the embodiment of Figures 6 to 10 the segment guide 47 has in each case a receptacle 48 which extends in the radial direction r and which is designed to complement a correspondingly radially aligned or radially extending extension 38 of the carrier guide 37 . In other words, each segment 40 can be plugged with its radially inwardly directed insertion opening of the receptacle 48 onto an extension 38 of the carrier guide 37 that projects radially outward with its free end.

The segment guide 47 adjoining the inner edge 44 enables the earliest possible interaction with the segment guide 47 when the individual segments 40 are assembled from radially outward to radially inward, so that the insertion or the radially inward assembly can take place particularly easily.

As in particular in 10 shown, the receptacle 48 has two opposing side cheeks 53, 55 or side edges 53, 55. In the example shown, the side walls 53, 55 extend essentially parallel to one another. They also extend parallel to an imaginary center line or line of symmetry of the segment body 42 running in the radial direction. Complementary to this, the carrier guide 37, and thus its radially outwardly projecting extension 38, has corresponding side edges 33, 35, which during the assembly of the segment or . Also provided and formed on the underside 41 of the segment body 42 are a plurality of fastening points 50, for example in the form of blind holes for bristles 6 or tufts of bristles.

In this way, the mutually complementary side edges and side walls 33, 35, 53, 55 can function as sliding or guiding surfaces when the segment 40 is mounted on the carrier 12. Adjacent to the radially inner inner edge 44 , the side walls 53 , 55 have insertion bevels 54 that widen in the circumferential direction towards the receiving edge and that act as a centering aid and as an insertion aid for the extension 38 .

The receptacle 48 is delimited by an end wall 56 in the radial direction. The extension 38 also has an end face 36 which comes to rest against the end wall 56 when the segment 40 on the carrier 12 reaches the final assembly position. The mutual contact position of the end wall 56 and the end face 36 limits an assembly movement of the segment 40 on the carrier 12. The end face 36 can, in particular, function as a radial end stop 90 for a segment 40 on the carrier side.

The segment 40 can thus be supported on the carrier 12 in the radial direction r via the mutual contact position of the end wall 56 and the end face 36 . The width of the extension 38 in the circumferential direction u can essentially correspond to the clear width between the side walls 53, 55. However, it can also be somewhat smaller, in order in particular to enable the segment 40 to be mounted on the carrier 12 in a particularly simple manner without tilting.

The end wall 56, as in particular in the Figures 9 and 10 shown, have a coding 57, which is provided with a radial projection 58, for example. Complementary or corresponding to this, the end face 36 can also have a counter-coding 39 which positively engages with the mechanical coding 57 when the final assembly configuration is reached. Consequently, the counter-coding 39 can have a groove or recess corresponding to the shape of the extension or the projection 58 . Once the final assembly configuration has been reached, the mutual engagement of coding 57 and counter-coding 39 can be used to achieve a further precisely fitting fixation of segment 40 on carrier 12 .

In the exemplary embodiment shown, the mechanical coding has a projection 58 tapering to a point, which can be inserted into the complementary and correspondingly tapering recess of the counter coding 39 . In this way, a kind of centering with respect to the circumferential direction u can take place as soon as the segment body 42 has reached its final assembly position on the carrier 12 .

The exemplary embodiment shown of coding 57 and counter-coding 39 is merely an example. Thus, the mechanical coding 57 can also have a radial recess, in which a correspondingly configured radial extension of the mechanical counter-coding 39 of the carrier guide 37 engages.

As further in the Figures 8 and 10 shown, the receptacle 48 is limited in the axial direction z, ie in the direction parallel to the axis of rotation 1, by a cover section 59 which extends up to the inner edge 44 of the segment body 42 protrudes. The cover section 59 closes the receptacle 48 at the top, towards the top 49 of the segment body 42 . The cover section 59 can be part of the upper side 49 of the segment body 42 . The cover section 59 typically extends between the opposite side cheeks 53, 55 of the receptacle 48. It closes the receptacle 48 upwards in the axial direction. The receptacle 48 is open at the bottom. This means that the side cheeks 53, 55 are not delimited downwards in the axial direction, but instead merge directly into the underside 41 of the segment body 42, which is otherwise designed to be essentially flat. The side walls 53, 55 are delimited by the cover section 59 at the top and in the opposite axial direction.

As in particular in 6 shown, a disk-like intermediate piece 20 is arranged on the underside 15 of the carrier disk 14 . On the intermediate piece 20, which has a much smaller radius than the carrier disk 14, a further mechanical coding 22 is formed on the outer edge, for example in the form of a wave pattern. Finally, on the intermediate piece 20, and therefore on the underside of the intermediate piece 20 facing away from the carrier disc 14, a holder 30 is arranged, on which the carrier guides 37 are formed. The mount 30 can also have a disk-like contour and geometry.

On the carrier plate 14, the intermediate piece 20 and on the holder 30, passage openings 81, 82, 83 which come to lie in alignment with one another and which function as screw holes can be formed. The components carrier disc 14, intermediate piece 20 and holder 30 can be firmly connected to one another via those passage openings 81, 82, 83. The outer radius or the radial outer dimensions of the holder 30 are at least slightly larger than those of the intermediate piece 20. In particular, the carrier guides 37 or the extensions 38 projecting radially outwards on the holder 30 can protrude from the radial outer edge of the intermediate piece 20, as is shown, for example, in the enlarged view of the 8 is shown.

In this respect, an axial gap 85 is formed between the underside 15 of the carrier disk 14 and an upper side of the holder 30 facing the carrier disk 14 . When the segments 40 are inserted or pushed on, the cover section 59 protruding onto the upper side 49 of the segment bodies 42 enters that gap 85 . In this way, the segment 40 in question or the segment body 42 can be clamped or axially secured with its cover section 59 in the intermediate space or in the gap 85 between the carrier disk 14 and the holder 30 . Such an axial securing is immediately upon reaching the radially inner final assembly configuration of the segment body 42 on Beam 12 reached. Finally, the segment 40 or its segment body 42 only needs to be secured or fixed on the carrier 12 in the radial direction r by means of the central locking element.

The examples shown here of holding or guiding segments on the carrier are only examples. Deviating from this, a wide range of corresponding carrier and segment guides can be implemented, by means of which a segment can be guided in a radially displaceable manner on the carrier. The central locking system described here is in principle also conceivable, for example, for securing segments, as for example in the U.S. 3,766,589 A or in the EP 3 231 322 A1 are described.

Reference List

1

axis of rotation

6

bristles

10

Sweeping or cleaning device

12

carrier

13

passage opening

14

carrier disc

15

bottom

16

top

17

outer edge

18

recess

20

spacer

22

mechanical coding

30

bracket

33

margin

35

margin

36

face

37

carrier guidance

38

extension

39

counter-coding

40

segment

41

bottom

42

segment body

43

margin

44

inner edge

45

margin

46

outer edge

47

segment guidance

48

admission

49

top

50

attachment point

52

mechanical coding

53

sidewall

55

sidewall

54

lead-in bevel

56

bulkhead

57

mechanical coding

58

head Start

59

cover section

60

segment guidance

61

head Start

62

outside

63

outside

64

front

65

back

66

neck section

67

head section

68

outer edge

69

outer edge

70

bottom

72

bottom

76

counter-coding

77

admission

80

fuse element

81

passage opening

82

passage opening

83

passage opening

85

gap

86

safety hook

90

end stop

100

central locking link

101

factory

102

central locking system

103

groove

105

inner edge

110

closed structure

111

ring

112

tape

114

edging

115

rope

120

tendon

122

clamp

123

hook

124

Kitchen sink

125

end

126

section

127

end

128

section

129

operating lever

130

carrier guidance

132

sidewall

133

sidewall

135

face

137

head Start

147

face

148

margin

149

margin

156

plate

158

base section

Claims (15)

Central locking system for releasably fixing at least a first cleaning, sweeping, grinding or polishing segment (40) and a second cleaning, sweeping, grinding or polishing segment (40') on a carrier (12 ) to form a disc broom (11) or to form a cleaning, sweeping, grinding or polishing disc, with: - a pull-stable central locking element (100) which, in relation to the axis of rotation (1), on a radially outward-facing first contact (101) of the first cleaning, sweeping, grinding or polishing segment (40) and on a radially outward-facing second Abutment (101') of the second cleaning, sweeping, grinding or polishing segment (40') can be brought into radial contact and is designed to exert a radially inwardly directed holding force on the first segment (40) and the second segment (40'). is. Central locking system according to claim 1, wherein the central locking member has a radially inwardly directed inner edge (105) by means of which the central locking member (100) can enclose the first abutment (101) and the second abutment (101') in the circumferential direction. Central locking system according to claim 1 or 2, wherein the central locking member (100) has a circumferentially closed structure (110). Central locking system according to one of the preceding claims, wherein the central locking member (100) has a dimensionally stable ring (111). Central locking system according to one of the preceding claims 1 to 3, wherein the central locking member (100) comprises a flexible strap (112), a flexible sling or a flexible cable. Central locking system according to one of the preceding claims, wherein the central locking member (100) has a tensioning member (120) by means of which the effective length or the effective circumference of the central locking member (100) can be changed. Central locking system according to claim 6, wherein the clamping member (120) comprises a turnbuckle or a clamp (122). Central locking system according to claim 6 or 7, wherein the tightening member (120) has a rotatably mounted spool (124) onto which the flexible band (112), the flexible loop or the flexible cable can be wound at least in sections. Carrier (12) for forming a disc broom (11) or for forming a cleaning, sweeping, grinding or polishing disc which can be mounted rotatably with respect to an axis of rotation (1), the carrier (12) having a carrier disc (14) with a Underside (15), with an opposite upper side (16) and with an outer edge (17), with at least one first cleaning, sweeping, grinding or polishing segment (40) on the underside (15) of the carrier disc (14). a radially outward-facing first abutment (101) and at least one second cleaning, sweeping, grinding or polishing segment (40') can be releasably arranged with a radially outward-facing second abutment (101'), and - with a pull-stable central locking element (100) which, based on the axis of rotation (1), can be brought into radial contact with the first contact (101) of the first segment (40) and with the second contact (101') of the second segment (40'). and is designed to exert a radially inwardly directed holding force on the first segment (40) and the second segment (40'). Carrier (12) according to Claim 9, in which the central locking element (100) is arranged or can be arranged on the upper side (16) or on the outer edge (17) of the carrier disc (14). Carrier (12) according to claim 9 or 10, wherein the carrier disc (14) in the region of the first cleaning, sweeping, grinding or polishing segment (40) has a recess (18) designed as a through-opening for a first cleaning, sweeping, grinding or polishing segment (40) has a protruding securing element (80) on which the central locking member (100) can be brought into contact with the first abutment (101) is formed. Carrier (12) according to Claim 11, which has a carrier guide (37) which is designed to correspond to a segment guide (47; 147; 247; 347) configured on the cleaning, sweeping, grinding or polishing segment (40) in order to cleaning, To move the sweeping, grinding or polishing segment (40) by means of a radially inward displacement movement relative to the carrier (12) into a final assembly position on the carrier (12), in which the cleaning, sweeping, grinding or polishing segment can be moved by means of the central locking element (100) can be fixed. Carrier (12) according to one of the preceding claims 9 to 12, wherein the carrier disc (14) has at least a first end stop (90) for the first cleaning, sweeping, grinding or polishing segment (40) and a second end stop (90') for the second cleaning, sweeping, grinding or polishing segment and wherein the first cleaning, sweeping, grinding or polishing segment (40) is held at the first end stop (90) and the second cleaning, Sweeping, grinding or polishing segment (40') can be fixed on the second end stop (90'). Cleaning, sweeping, grinding or polishing device (10) with a carrier (12) according to one of the preceding claims 9 to 12 and with a first cleaning, sweeping, grinding or polishing segment (40) and with at least one second cleaning -, sweeping, grinding or polishing segment (40'). Cleaning, sweeping, grinding or polishing device (10) according to claim 14 with at least one end stop (90) on which the cleaning, sweeping, grinding or polishing segments (40) on reaching a radially inner final assembly position on the carrier (12 ) come into contact in the radial direction or in the circumferential direction, and wherein the central locking element (100) is designed to move the first and the at least second cleaning, sweeping, grinding or polishing segment (40, 40') towards the end stop (90). Press or hold in a contact position at the end stop (90).

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