EP3210494B1 - Fastening system for brush elements - Google Patents

Description

The present invention relates to a fastening system for sweeping elements on a machine-driven sweeping machine. The invention also relates to a sweeping device equipped with such a fastening system for arrangement on a sweeping or cleaning machine. In a further aspect, the invention relates to sweeping elements specially adapted to the fastening system for tool-free arrangement on a machine-driven sweeping or cleaning machine. The sweeping device is designed in particular as a circular broom, preferably for removing weeds and / or other vegetation on paved surfaces. The fastening system provides a quick-change system for the rapid replacement of wearing sweeping elements of the sweeping device.

background

For the removal of weeds on paved surfaces, especially in the area of curbs or on paved paths or squares, sweeping devices provided separately for this purpose are used. Common sweeping devices are designed as circular brooms with a machine-driven plate that can be rotated on a cleaning or sweeping machine. On the rotatable plate, individual receptacles are provided for fastening sweeping elements designed as wire bundles or as tufts of bristles.

Such a sweeping device with interchangeably arranged on the rotatable plate sweeping elements is for example from the EP 0 740 915 A2 known. Various sockets are provided here for releasably holding individual brushes on a carrier disk, all of which are each provided with a spring-loaded stop member. The stop member, designed in the manner of a displaceable pin, can only be transferred into a release position with the aid of a special tool, in which the respective brush can be detached from the carrier disk and replaced.

The provision of a separate fastening and locking mechanism on each socket of the carrier disk is comparatively complex and costly for the production of such circular brooms. Furthermore, equipping each socket with a separate locking element, each manually operated, proves to be prone to failure and requires a lot of maintenance. The separate handling of a large number of locking elements by means of a separate tool is also very tedious and labor-intensive for the simultaneous replacement of many brushes on the plate.

In contrast, the object of the present invention is to provide an improved fastening system, an improved sweeping device and sweeping elements provided for this purpose for a sweeping or cleaning machine, which enable a particularly simple replacement of worn sweeping elements, which can be produced particularly inexpensively, which is also particularly low-maintenance and only slightly Are designed to be prone to failure.

Invention and advantageous embodiments

The subject matter of the invention is indicated by the independent claims. In one aspect, the invention relates to a fastening system for the detachable arrangement of at least one sweeping element on a machine-driven sweeping machine. The fastening system comprises a longitudinally extending fastening device and a sweeping element which can be detachably arranged on the fastening device. The fastening device itself can typically be arranged on a rotatable and mechanically driven carrier of a sweeping machine or it is arranged thereon.

The fastening device has a longitudinally extended geometry. The sweeping element, which can be detached and fastened to the fastening device without tools, has a fastening structure on a proximal end section which, when the sweeping element is in operation, faces away from a surface to be cleaned. The fastening device has a counter-fastening structure configured to correspond to the fastening structure on a distal end section which faces the sweeping element to be fastened to it. Fastening structure and counter-fastening structure can, in particular, interlock with one another in a form-fitting manner and can be brought into operative connection with one another.

The fastening structure and the counter-fastening structure have in particular positively interlocking geometries, by means of which the elongated sweeping element can be releasably fastened with its proximal end section on the distal end section of the fastening device.

The fastening system furthermore has a securing element which is guided on the fastening device so that it can be longitudinally displaced between a distal securing position and a proximal release position. The mutual engagement of the fastening structure and the counter-fastening structure can be fixed and secured by means of the securing element. With the securing element in the securing position, a loosening of the fastening structure and the counter-fastening structure is effectively prevented.

A reciprocal release of the fastening structure and the counter-fastening structure is only possible with the securing element in the release position.

In its securing position, the securing element encloses the counter-fastening structure at least in sections. The securing element preferably encloses or encompasses at least that partial area of the counter-fastening structure which can be brought into and / or disengaged from the fastening structure of the sweeping element. With a fastening structure held by the counter-fastening structure or in engagement with the counter-fastening structure, the securing element in the closed position can prevent the sweeping element from being released from the fastening device.

The counter-fastening structure of the fastening device is accessible from the outside when a securing element is in the release position. The counter-fastening structure is particularly accessible to the fastening structure of the sweeping element when the securing element is in the proximal release position.

The sweeping element or its fastening structure has a radially symmetrical geometry, for example in the form of an approximately cylindrical locking bush. In the present context, an axial direction is to be equated with the longitudinal direction of the sweeping elements or with the longitudinal direction of the fastening devices provided for this purpose. The axial or longitudinal direction can, but does not have to, coincide with an axis of rotation of the rotatable and machine-driven carrier. It is provided that the fastening device is inclined outwards at a predetermined angle and extends downwardly away from the rotatable plate-like carrier. However, configurations are also conceivable in which a longitudinal axis of the fastening devices and the sweeping elements fastened to them extend parallel to the axis of rotation of the carrier.

The securing element is also guided in the axial direction or in the longitudinal direction between the release position and the securing position on the fastening device. In contrast, the fastening structure and the counter-fastening structure can be brought into engagement and disengaged along a direction deviating therefrom. The fastening structure and the counter-fastening structure are typically designed as form-locking means that can be brought into engagement and / or disengaged with one another in relation to the axial or longitudinal direction of the fastening device in the radial direction and / or in the tangential, i.e. in the circumferential direction.

An engagement or disengagement of the fastening structure and the counter-fastening structure is only possible when the securing element is in the release position, that is to say in the proximally retracted position. The fastening device and the counter-fastening structure are designed in particular to form a form-fitting connection that acts in the axial direction. In the axial direction, i.e. in the longitudinal direction of the fastening device or in the longitudinal direction of the sweeping element, forces acting on the sweeping element during operation of the sweeping machine are introduced via the fastening structure into the counter-fastening structure which is engaged therewith and which is fixedly arranged on the rotatable carrier of the sweeping machine.

Any centrifugal forces acting on the fastening system during operation of the sweeper ensure that the securing element remains in its distal securing position. In that locking position, any tangential or radial movement of the sweeping element relative to the fastening device is blocked. The securing element can only be transferred from the securing position to the proximal release position when the sweeping machine is at a standstill, in which a radial and / or tangential movement of the sweeping element, i.e. a radial and / or tangential movement of the fastening structure and the sweeping element relative to the fastening device or counter-fastening structure, is now released is.

An assembly or disassembly movement for the sweeping elements on the fastening device typically extends perpendicularly or obliquely to the longitudinal direction of the Fastening device or perpendicular or oblique to the axial guidance of the securing element on the fastening device.

According to a further embodiment, the securing element has a securing sleeve that is displaceable on the outside and on the distal end section of the fastening device. In the securing position, a distal end of the securing sleeve typically encloses the counter-securing structure of the securing device which is in engagement with the securing structure. Since the securing sleeve at least at its distal end encloses an overlap area of the fastening device and sweeping element, or an overlap area of the fastening structure and counter-fastening structure in the circumferential direction, detachment, in particular disengagement of the fastening structure from the counter-fastening structure is effectively prevented.

The securing sleeve is designed in particular as a cylindrical or oval sleeve. At its distal end section, that is to say facing the sweeping element mounted on the fastening device, it has a securing space which tightly encloses the counter-fastening structure, and consequently also the fastening structure which is in engagement therewith. That enclosing in the circumferential direction effectively prevents any relative movement of the fastening structure relative to the counter-fastening structure in the plane perpendicular to the longitudinal direction of the sweeping element or perpendicular to the longitudinal direction of the fastening device.

According to a further embodiment, the securing element, in particular the securing sleeve, can be moved from the securing position into the release position against the force of a spring. In other words, the securing element is held in the securing position by the force of the spring. In this way, unintentional loosening of the sweeping element from the fastening device is blocked. The spring can be designed as a compression spring or as a tension spring. For example, it can have a helical geometry.

It can in particular be arranged in a radial space between the outside of the fastening device and an inside of the securing element. The spring can be fixed with opposite axial end sections once on the fastening structure and once fixed on the securing element and / or come to rest on corresponding projections extending outward or inward in the radial direction in order to move the securing element approximately in the distal direction opposite the fastening device to press.

By means of the spring, a fastening system that is particularly intuitive and easy to use can be provided, which enables tool-free assembly and disassembly of sweeping elements on corresponding fastening devices.

One of the fastening structure and counter-fastening structure has a shaft section and a radially widened head adjoining it in the longitudinal direction. The head can be inserted into a receptacle provided on the other of the fastening structure and the counter-fastening structure. There are two different embodiments for this. If the radially expanded head is located on the fastening structure, the counter-fastening structure is provided with a receptacle corresponding to it. If the radially expanded head is located on the counter-fastening structure, the fastening structure is provided with a receptacle corresponding to it.

For a releasable fastening of the sweeping element to the fastening device, either the sweeping element or the fastening device has a radially widened head. The other partner of the fastening device and the sweeping element has the receptacle provided for receiving the head.

The shaft section axially adjoining the head has a smaller diameter or a smaller radial extent than the head. Depending on the embodiment, the head is located either on a distal end section of the counter-fastening structure or on a proximal end section of the fastening structure. The shaft section is spaced from the axial end of the respective fastening structure or counter-fastening structure by the axial extent of the head.

If, for example, the fastening structure of the sweeping element is equipped with the head and the shaft section, the head at the same time forms the proximal end section of the sweeping element. Conversely, however, it is also conceivable that a distal end of the counter-fastening structure is provided with the radially widened head.

According to a further embodiment of this, the receptacle has a radially tapered, partially circular neck section, which is designed to receive the shaft section, at a front end of the counter-fastening structure or the fastening structure. If the receptacle is located, for example, on the fastening device, thus on the counter-fastening structure, then the distal end of the fastening structure has the neck section with a tapered diameter. The clear diameter of the neck section is at least as large as the outer radius or the outer diameter of the shaft section.

When an assembly position is reached, the radially tapered shaft section is located inside the radially tapered part-circular neck section. Radially tapered here means an internal form-fit structure of the relevant counter-fastening structure or fastening structure.

Said neck section merges in the longitudinal direction into a radially widened head section which is designed to receive the head of the other fastening or counter-fastening structure.

If the radially expanded head is located on the fastening structure on the sweeping element side, the receptacle is formed on the fastening device to be provided on the carrier side. In the transition from the shaft section to the radially expanded head, a contact surface pointing in the distal direction is formed, which can be brought into contact in an undercut or on a contact surface pointing in the proximal direction in the transition area of the neck section and head section of the receptacle.

The mutual contact position of those distal and proximal contact surfaces causes an axial securing of the fastening structure on the counter-fastening structure, and consequently an axial securing of the sweeping element on the fastening device.

Conversely, however, it is also conceivable that the fastening device is provided with the radially widened head and the shaft section adjoining it, while the sweeping element has a receptacle corresponding to it. The securing element is always arranged displaceably on the fastening device.

According to a further embodiment, a side wall which radially delimits the receptacle has a lateral recess which is designed to receive the head and the shaft section. Viewed in the axial direction, the recess extends over the entire neck section and at least in some areas also or even completely over the head section of the receptacle. The provision of a lateral recess, for example in a side wall of the counter-fastening structure or fastening structure that forms the receptacle, for example in a side wall of the sleeve-like fastening device, enables a particularly simple form-fitting insertion of the head and shaft section into the receptacle when they are retracted in the release position Fuse element. The recess also extends into an end wall at the longitudinal end of the fastening structure or counter-fastening structure having the receptacle.

In the release position, the securing element is withdrawn at least so far that it exposes the recess at least as far as the head section. The securing element can be withdrawn so far in the proximal direction until the release position is reached that it makes the recess in the area of the neck section and in the area of the head section of the receptacle accessible from the outside and to that extent releases it.

The lateral recess has a clear diameter or a partial circle section in the side wall of the receptacle, which is larger in the tangential or radial direction than the respective outer diameter of the head or the axially adjoining shaft section. In this way, lateral or radial insertion of the head and shaft section into the receptacle is made possible.

According to a further embodiment, it is provided in particular that the head is formed on the fastening structure and the receptacle is formed on the counter-fastening structure. Accordingly, the shaft section is also located on the fastening structure, that is to say on the proximal end section of the sweeping element. The neck portion of the receptacle is located at a distal end and thus axially adjacent to the head portion of the receptacle of the fastening device.

Since the sweeping element is a wear part, it proves to be particularly advantageous to provide the geometrically comparatively easy to manufacture head and the shaft section on the sweeping element and to design the counter-fastening structure equipped with a receptacle on the fastening device. In principle, however, reverse arrangements of fastening structure and counter-fastening structure are also conceivable, the fastening structure provided with the head and the shaft section being formed on the fastening device and the counter-fastening structure provided with the receptacle being formed on the proximal end section of the sweeping element.

According to a further embodiment, the securing element, in the closed position, covers or closes the lateral recess of a side wall of the fastening device that radially delimits the receptacle. In the secured position, the securing element covers and closes the lateral recess. In the securing position, the securing element blocks a movement of the head and shaft section in the radial direction. The sweeping element is thus fixed to the fastening device in a form-fitting manner.

In a modified embodiment with a fastening structure provided on the fastening device, it can analogously also be provided that the securing element, in the closed position, encloses the head and the shaft section of the fastening structure axially adjacent thereto. When the securing element is withdrawn and in the proximal release position, the head and the axially adjoining shaft section of the counter-fastening structure are equally accessible from the outside and for the fastening structure. In this case, the fastening structure of the sweeping element has the receptacle provided with a lateral opening or recess.

For every conceivable configuration, in the securing and securing position of the securing element, a side wall of the counter-securing structure that closes off the receptacle radially outward is always enclosed by an inner side of the distal end section of the securing element.

According to a further embodiment, the securing sleeve has, axially offset from a distal end section, a flange section which protrudes radially inward and is axially guided on the outside of the fastening device. The flange section can fulfill a double function here. On the one hand, by means of the flange section protruding radially inward from the inside, the securing sleeve can be guided axially at a predetermined radial distance on the outside of the fastening device without tilting. Axially offset from the flange section, an annular gap can be formed between the inside of the securing sleeve and an outside of the fastening device, which is also approximately sleeve-shaped or rod-shaped. In that annular gap, for example, the spring can be arranged, by means of which the securing element is held in the securing position.

Furthermore, the flange section of the locking sleeve, which protrudes radially inward, can at the same time also form an axial end stop. The axial end stop can be designed as a distal end stop which holds the securing element in the distal securing position. If the securing element reaches the securing position by applying the spring force emanating from the spring, the inwardly protruding flange section of the securing element can interact with a corresponding end stop on the outside of the fastening device, so that the securing element cannot be moved beyond the securing position in the distal direction relative to the fastening device is.

According to a further embodiment, a distal end of the spring is supported on a proximal side of that flange section of the securing element. The spring is typically designed as a compression spring. It is axially compressible against a restoring force. The spring can have a helical or helical geometry. It can be located within a cylindrical annular gap formed between the fastening device and the securing element.

According to a further embodiment, it is also provided that a proximal end of the spring is supported on the bottom of a securing bushing. This encloses at least one axial section of the fastening device. The securing bushing can also form an approximately cylindrical annular gap with the fastening device. It can be open in the distal direction. The securing socket itself can be fastened axially to the fastening device. It can also be releasably fixed to the fastening device for the purpose of assembly or disassembly.

Because of the interaction with the spring, it is sufficient if the securing bushing is only secured in one direction, namely in the proximal direction opposite or on the fastening device. For this purpose, the provision of a securing element, for example in the form of a securing pin or a securing ring, at the proximal end of the securing bushing can already be sufficient. It is conceivable, for example, that the rod-shaped fastening device has a radial through opening or an annular groove through which a locking pin can be inserted or in which it can be fixed in the locking ring.

The securing element can function as a proximal end stop for the securing bushing, which is otherwise axially displaceably mounted on the outside of the fastening device. The spring extending axially between the securing bushing and securing element ensures a certain prestress, so that on the one hand the securing element with its radially inwardly protruding flange section on a distal one End stop of the fastening device rests and on the other hand the securing bushing is pressed by the spring in the proximal direction against the securing element. This also provides a particularly simple assembly, but also dismantling of the fastening device, which may be provided for the maintenance case.

According to a further embodiment, the securing element is guided axially on a radial outside of the securing bush. It is provided here in particular that a region of the securing element lying on the proximal side of the flange section overlaps radially with the securing bushing both in the release position and in the securing position of the securing element. In this respect, a displacement movement of the securing element from the securing position into the release position can be guided not only by the flange section, but also by the securing bushing. The securing element is guided on the fastening device twice and axially spaced, so that it is mounted on the fastening device so that it can be moved longitudinally between the release position and the securing position so that it is largely free of tilting and without tilting.

According to a further aspect, the invention finally relates to a sweeping device for arrangement on a machine-driven sweeper. The sweeping device has a support which can be rotatably arranged on the sweeping machine and on which a plurality of longitudinally extending fastening devices are arranged for the detachable fastening of one longitudinally extending sweeping element in each case. The sweeping elements each have a fastening structure on a proximal end section. The fastening devices each have a counter-fastening structure configured to correspond to the fastening structure on a distal end section.

A securing element each of a distal securing position and a proximal release position is mounted or guided on the fastening devices so as to be longitudinally displaceable. In the securing position, the securing element encloses the counter-fastening structure at least in sections. In the release position, however, the counter-fastening structure is accessible from the outside.

The sweeping device is almost identical to the fastening system described above. The sweeping device comprises all components of the fastening system described above that are to be permanently arranged on the sweeping machine, that is to say the carrier which is rotatably arranged on the sweeping machine and several in turn on the Carrier either fixed and non-releasable or possibly also releasably arranged fastening devices. The sweeping device is used for the detachable and tool-free fastening of individual sweeping elements, which as such are only temporarily the object of the sweeping device due to their replacement due to the closure.

All of the features and advantages described above in relation to the fastening system also apply equally to the sweeping device, in particular to its fastening devices.

According to a further aspect, a sweeping element is finally provided for releasable attachment to a fastening device of a previously described sweeping device. The sweeping element has a longitudinally extending tuft or wire bundle and a socket socket. A proximal end of the brush or wire bundle is fixed in the socket. On a proximal end section facing away from the tuft or wire bundle, the socket socket has a fastening structure which is designed to correspond to a counter-fastening structure of the fastening device. The fastening structure of the sweeping element has either a head and an axially adjoining shaft section, the head being expanded radially with respect to the shaft section, or the fastening structure has a receptacle with a neck section and an axially adjoining head section, the head section having a larger radial one Having cross section than the neck portion.

According to a variant in which the head forms a proximal end of the socket socket, the shaft section can represent a radial taper or a radial groove in the socket socket, which is otherwise cylindrical or oval. For the detachable fastening of the sweeping element to a fastening device, an undercut area in the transition between head and shaft section is decisive in order to be able to transmit or absorb forces acting in the axial direction.

In the other variant, it is conceivable that the socket socket has the already described receptacle with a radially tapered neck section and an axially adjoining head section for receiving a head and shaft section configured correspondingly on the fastening device.

All the features and advantages of the sweeping element described above with regard to the fastening system apply in the same way to the isolated sweeping element, which is designed as a spare and wear part. All of the features described in connection with the sweeping device and its interaction with the sweeping element also apply equally to the individual sweeping element.

Brief description of the figures

Fig. 1

eine schematische und perspektivische Darstellung einer mit mehreren Kehrelementen bestückten Kehrvorrichtung,

Fig. 2

einen Querschnitt durch ein an einer Befestigungseinrichtung angeordnetes Kehrelement mit dem Sicherungselement in Sicherungsstellung,

Fig. 3

eine Darstellung gemäß Fig. 2, jedoch mit dem Sicherungselement in Lösestellung,

Fig. 4

eine Seitenansicht einer mit einem Kehrelement versehenen Befestigungseinrichtung mit dem Sicherungselement in Sicherungsstellung,

Fig. 5

eine Darstellung gemäß Fig. 4, jedoch mit dem sich in Lösestellung befindlichen Sicherungselement,

Fig. 6

eine perspektivische Darstellung gemäß Fig. 4,

Fig. 7

eine perspektivische Darstellung gemäß Fig. 5 und

Fig. 8

eine perspektivische Darstellung eines von der Befestigungseinrichtung gelösten Kehrelements.

Further goals, features and advantageous possible applications of the invention are explained below on the basis of exemplary embodiments with reference to the drawings. Here show:

Fig. 1

a schematic and perspective representation of a sweeping device equipped with several sweeping elements,

Fig. 2

a cross section through a sweeping element arranged on a fastening device with the securing element in the securing position,

Fig. 3

a representation according to Fig. 2 , but with the locking element in the release position,

Fig. 4

a side view of a fastening device provided with a sweeping element with the securing element in the securing position,

Fig. 5

a representation according to Fig. 4 , but with the locking element in the release position,

Fig. 6

a perspective view according to Fig. 4 ,

Fig. 7

a perspective view according to Fig. 5 and

Fig. 8

a perspective view of a detached from the fastening device sweeping element.

Detailed description

In Fig. 1 a sweeping device 10 is shown in a perspective view obliquely from below. The sweeping device 10, which is typically designed as a circular broom, has a carrier 12 shaped like a disk or ring. The carrier 12 has several Fastening devices 14 which are arranged on the carrier 12 distributed over the circumference. The carrier 12 can typically be detachably screwed to a sweeping or cleaning machine. During operation, the carrier 12 is moved in a rotating manner by the sweeping or cleaning machine, which is not explicitly shown here. An axis of rotation 1 typically extends through the center of the sweeping device 10.

In a departure from the illustration shown here, the carrier can also be designed in the form of a cylindrical roller. Individual fastening devices 14 would have to be arranged on an outer circumference of the cylinder and fastened in accordance with the fastening means described here. In the assembly or working position on a sweeping or cleaning machine, the roller-shaped or cylindrical carrier would be rotatably mounted on a sweeping or cleaning machine along its cylinder longitudinal axis. The fastening devices 14 and sweeping elements 20 that can be arranged thereon would then extend radially outward essentially perpendicularly to the axis of rotation of the roller body, i.e. in relation to its cylinder geometry.

At the bottom of the in Fig. 1 The carrier 12 shown are a plurality of fastening devices 14 distributed over the circumference of the carrier 12, each for holding and releasably fastening exchangeable sweeping elements 20. The fastening devices 14 have a longitudinally extended geometry. They extend with their longitudinal axis or with their axial direction typically at a predetermined angle to the axis of rotation 1 or to the surface normal of the carrier 12 radially outward and downward. In an axial extension of the individual fastening devices 14, individual sweeping elements 20 are arranged thereon so as to be exchangeable. These also extend radially outward and downward from the underside of the carrier 12 at a predetermined angle.

The in the further representations of the Figures 2 to 8 The sweeping elements 20 shown have longitudinally extending tufts of bristles or wire bundles 24. At their proximal end section 2, that is to say facing the carrier 12 and the fastening devices 14, the individual sweeping elements 20 each have a socket socket 22. The base socket 22 is designed as a crimp or compression sleeve made of aluminum or another metal, such as steel.

It is used to securely fix and frame a proximal end of the wire bundle 24. As in particular in the perspective illustration according to FIG Fig. 8 shown, the base socket 22 has, at its proximal end 2, a head 26 that is radially widened in relation to a shaft section 28. The head 26 terminates in the proximal direction with an essentially flat end face 21. At the in Fig. 8 The underside of the head 26 facing away from the viewer is a contact surface 25 directed in the distal direction, via which the head 26 merges into the shaft section 28. The shaft section 28 can also be viewed as an annular recess 27 or as an annular groove in the outside of the base socket 22.

At a distal end facing away from the head 26, the shaft section 28 merges into a radially widened contact shoulder 29. The contact shoulder 29 at the same time defines the axial end of an interior space of the base socket 22 provided for receiving the wire bundle 24.

To this extent, the base socket 22 has a fastening structure 23 by means of which the sweeping element 20 can be releasably fixed to the fastening devices 14 on the underside of the carrier 12 without the aid of tools and is particularly easy to replace.

While the proximal end section 2 of the sweeping element 20 is provided with a fastening structure 23, a distal end section 3 of the fastening device 14 has a counter-fastening structure 33 that corresponds to it. This and how it works is particularly in the Figs. 2, 3 and 8th shown. A receptacle 30 is formed on the distal end section 3 of the elongated fastening device 14. The receptacle 30 has a neck section 38 which is tapered in cross section and a head section 36 adjoining it in the axial direction and offset proximally to the neck section 38. The neck section 38 protrudes into the distal end face 39 of the fastening device 14.

The clear width or the inner cross section of the head section 36 corresponds to the outer cross section of the head 26. The clear width or the inner cross section of the neck section 38 corresponds to the outer contour of the shaft section 28. The end face 39 on the distal end section 3 of a base body 16 of the fastening device 14 comes with the in proximal direction facing shoulder 29 of the socket 22 to the plant. A contact surface 35 pointing in the proximal direction inside the receptacle 30, namely in the transition from the radially tapered neck section 38 to the radially widened head section 36, comes into contact with the corresponding distal contact surface 25 of the head 26 of the sweeping element 20.

The mutually engaging contact surfaces 25, 35 and 29, 39 effect an axial securing of the fastening structure 23 on the counter-fastening structure 33. The end face 21 of the base socket 22 pointing in the proximal direction therefore also reaches a bottom 32 of the receptacle 30 pointing in the distal direction to the system. A precisely fitting insertion of the head 26 into the receptacle 30 enables the fastening structure 23 to be fixed on or in the counter-fastening structure 33 to a large extent without tilting and withstanding high mechanical loads.

As in particular in Fig. 8 As can be seen, a side wall 17 of the base body 16 delimiting the receptacle 30 is provided with a lateral recess 34 via which the head 26 with the axially adjoining shaft section 28 can be inserted laterally and radially into the receptacle 30. The lateral recess 34 or recess is only accessible if a securing element 40, which is guided longitudinally displaceably on the outside of the fastening device 14, is in a Fig. 3 , 5 , 7 and 8 shown release position L.

The securing element 40 has an approximately cylindrically shaped securing sleeve 41, the inside diameter of which is larger than the outside diameter of the base body 16. The securing sleeve 41 has a side wall 42, the outside of which is provided with a corrugation 48 in the form of ring-like projections. This corrugation facilitates gripping and the exercise of a displacement of the securing element 40 relative to the fastening device 14 in the axial direction, that is to say in the longitudinal direction. However, a knurled configuration, for example, is also conceivable.

A flange section 44 projecting radially inward is provided on the inside and at a predetermined distance from a distal end 46 of the securing sleeve 41. The flange section 44 divides the securing sleeve 41 into a proximal upper guide space 49 and into a distal lower securing space 43.

In the in Fig. 2 In the locking or securing position S shown in cross section, the side wall 42 of the securing sleeve 41 encloses the overlap area of the fastening structure 23 of the sweeping element 20 with the counter-fastening structure 33 of the fastening device 14. In that securing position S, the lateral recess 34 is closed by the securing sleeve 41, so that a radial movement the fastening structure 23 is blocked with respect to the counter-fastening structure 33. The head 26 and the shaft section 28 are fixed in the receptacle 30 in this way.

The securing element 40 is also engaged with a spring 50. In the present exemplary embodiment, a distal end 52 of the spring 50 is supported on a proximal contact surface 47 of the flange section 44. In the present case, the spring 50 is designed in a helical shape. It is axially compressible against a restoring force. In Fig. 3 the axially compressed configuration of the spring 50 'is shown schematically. The spring 50 and its contact with the flange section 44 causes a distal displacement of the securing element 40, so that it is moved into the securing position S or held in the securing position S under the action of a spring.

By manually applying a release force counteracting the restoring force of the spring 50, the securing element 40 can be moved into the position shown in FIG Fig. 3 Shown proximal release position L are shifted, in which it releases the lateral recess 34 or recess.

A proximal end 51 of the spring 50 is supported against a base 61 of a securing bushing 60, which is arranged axially offset, in particular proximally offset with respect to the flange section 44, on the base body 16 of the fastening device 14. The securing bush 60 can have a cup-shaped geometry. In particular, on its bottom 61 it can have a flange section that is set radially inward and by means of which it rests directly on the outside of the roughly rod-shaped base body 16.

To this extent, the securing bushing 60 forms an annular or cylindrical intermediate space 62, which is open towards the bottom or in the distal direction, with the outside of the base body 16, in which at least a proximal region of the spring 50 is guided. On the outside, the securing bushing 60 has a circumferential, approximately cylindrical guide surface 63. This is located radially on the inside on the inside of a proximal section of the securing sleeve 41.

As from a comparison of the Figs. 2 and 3 As can be seen, the inner wall of the guide space 49 of the securing sleeve 41 slides along the outside of the guide surface 63 of the securing bushing 60. The securing element 40, and therefore the securing sleeve 41, is guided in a longitudinally displaceable manner on the outer circumference of the base body 16 of the fastening device 14 in a double and axially spaced manner over the securing bushing 60 and also over the flange section 44. That multiple axial guidance is made possible a tilt-free displacement of the securing element 40 relative to the fastening device 14.

The securing bush 60 can be fixed to the fastening device 14 in a particularly simple manner by means of a securing element 64, for example in the form of a securing pin or securing ring. The security element, which is in the Figs. 2 and 3 is only indicated schematically, the base body 16 can penetrate, for example, in the radial direction. However, it can also be releasably fixed in the form of a securing ring in an annular groove on the outside of the base body.

The securing element 64 protrudes at least slightly from the outer circumference of the base body 16. With a proximal end section 65, the securing bushing 60 is pressed proximally against the securing element under the action of the spring 50. In this way, the securing bushing 60 and also the spring 50 are fixed in the proximal direction on the base body 16. The flange section 44 of the securing sleeve 41, in particular its contact surface 45 pointing in the distal direction, comes to rest in the securing position S with a contact surface 31 of the base body 16 pointing in the proximal direction, as can be seen from a comparison of FIG Figs. 2 and 3 emerges. The contact surface 31 of the base body can be designed as a radially widened shoulder. This is located at a proximal distance from the receptacle 30. The base body 16 can have a rod-shaped geometry in a proximal region and a geometry that is radially tapered compared to a distal region. The contact surface 31 in the transition from the proximal, radially tapered area to the radially expanded distal area having the receptacle can serve as an end stop for the flange section 44 of the securing sleeve 41. This consequently cannot be moved beyond the securing position S in the distal direction.

In this way, the securing sleeve 41 and thus also the spring 50 are fixed in the distal direction on the base body 16 and thus also on the fastening device 14. For assembly or maintenance purposes, the securing bush 60 can be pressed downward in the distal direction and against the spring force, so that the securing element can be removed. The entire arrangement of base body 16, spring 50, securing element 40 and securing bush 60 can then be dismantled.

From the representations according to Figs. 2 and 3 it can also be seen that the fastening device 14 itself can be fastened detachably to the carrier 12 of the sweeping device 10. The carrier 12 can have a plurality of through openings 15 through which a proximal extension 11 at the proximal end of the fastening device 14 or the base body 16 can be inserted through. The extension 11 coming to rest on the upper side of the carrier 12 in this way can be provided with an external thread which can be screwed to a corresponding screw nut 13.

In this way, individual fastening devices 14 can be releasably fastened to the carrier 12, in particular screwed on. Thus, individual fastening devices 14 can be individually exchanged, for example for maintenance purposes or for repair purposes, and / or subjected to a maintenance procedure. Deviating from this, it is also conceivable that the fastening devices 14 or some of the fastening devices 14 are permanently and cohesively connected to the carrier 12. In particular, it is conceivable that the fastening devices 14 or that individual fastening devices 14 shown here are welded or glued to the carrier 12.

List of reference symbols

1

Axis of rotation

2

proximal end section

3

distal end section

10

Sweeping device

11

Appendix

12th

carrier

13th

Screw nut

14th

Fastening device

15th

Through opening

16

Base body

17th

Side wall

20th

Sweeping element

21

Face

22nd

Socket

23

Fastening structure

24

Wire bundles

25th

Contact surface

26th

head

27

Recess

28

Shaft section

29

shoulder

30th

admission

31

Contact surface

32

ground

33

Counter fastening structure

34

Recess

35

Contact surface

36

Head section

38

Neck section

39

Face

40

Fuse element

41

Locking sleeve

42

Side wall

43

Fuse room

44

Flange section

45

Contact surface

46

distal end

47

Contact surface

48

Corrugation

49

Leadership room

50

feather

51

proximal end

52

distal end

60

Fuse socket

61

ground

62

Space

63

Guide surface

64

Fuse element

65

proximal end section

Claims (15)

1. Fastening system for releasably disposing at least one sweeper element on a mechanically driven sweeping machine, having:

   - at least one elongate fastening installation (14) which configured to be disposed on a rotatable support (12) of the sweeping machine,

   - at least one elongate sweeper element (20) which is able to be releasably fastened to the fastening installation (14) and which, on a proximal end portion (2) that faces the fastening installation (14), has a fastening structure (23),

   - wherein the fastening installation (14), on a distal end portion (3) that faces the sweeper element, has a mating fastening structure (33) which is designed so as to correspond to the fastening structure (23), and having

   - a securing element (40), characterized in that the securing element (40) on the fastening installation (14) is guided so as to be longitudinally displaceable between a distal securing position (S) and a proximal releasing position (L),

   - wherein the securing element (40) in the securing position (S) at least in portions encloses the mating fastening structure (33), and wherein the mating fastening structure (33) is externally accessible when the securing element (40) is situated in the releasing position (L).
2. Fastening system according to claim 1, wherein the securing element (40) has a securing sleeve (41) which is displaceable on the outside and on the distal end portion (3) of the fastening installation (14) .
3. Fastening system according to one of the preceding claims, wherein the securing element (40), counter to the force of a spring (50), is able to be transferred from the securing position (S) to the releasing position (L).
4. Fastening element according to one of the preceding claims, wherein one of the fastening structure (23) and mating fastening structure (33) has a shank portion (28) and, in the longitudinal direction adjacent thereto, a radially enlarged head (26) which is configured to be introduced into a receptacle (30) provided in the respective other one of the fastening structure (23) and the mating fastening structure (33).
5. Fastening system according to claim 4, wherein the receptacle (30), on a face-side end of the fastening structure (23) or of the mating fastening structure (33), has a radially tapered segment-shaped neck portion (38) which is configured for receiving the shank portion (28).
6. Fastening system according to claim 5, wherein the neck portion (38) in the longitudinal direction transitions into a radially enlarged head portion (36) which is configured for receiving the head (26) .
7. Fastening system according to one of the preceding claims 4 to 6, wherein a side wall (17) that radially delimits the receptacle (30) has a lateral clearance (34) which is configured for receiving the head (26) and the shank portion (28).
8. Fastening system according to one of the preceding claims 4 to 7, wherein the head (26) is configured on the fastening structure (23), and the receptacle (30) is configured on the mating fastening structure (33) .
9. Fastening system according to one of the preceding claims 7 or 8, wherein the securing element (40) in the securing position (S) covers or closes the clearance (34).
10. Fastening system according to one of the preceding claims 2 to 9, wherein the securing sleeve (40) comprises a flange portion (44) axially offset to a distal end portion (46), the flange portion (44) protruding radially inwardly and being guided axially on the outside on the fastening installation (14) .
11. Fastening system according to claims 3 and 10, wherein a distal end (52) of the spring (50) is supported on a proximal side of the flange portion (44) .
12. Fastening system according to one of the preceding claims 3 to 11, wherein a proximal end of the spring (51) is supported on the base (61) of a securing bush (60) which encloses at least an axial portion of the fastening installation (14).
13. Fastening system according to claim 12, wherein the securing element (40) is guided axially on a radial external side of the securing bush (60).
14. Sweeping device for disposal on a mechanically driven sweeping machine, having:

    - a support (12) which configured to be rotatably disposed on the sweeping machine and on which a plurality of elongate fastening installations (14) for releasably fastening in each case one elongate sweeper element (20) are disposed, wherein the sweeper elements (20), on a proximal end portion (2) that faces the fastening installation (14), have in each case one fastening structure (23),

    - wherein the fastening installations (14), on a distal end portion (3) that faces the respective sweeper element (20), have in each case one mating fastening structure (33) which is designed so as to correspond to the fastening structure (23), and characterized in that

    - in each case one securing element (40) on the fastening installations (14) is guided so as to be longitudinally displaceable between a distal securing position (S) and a proximal releasing position (L),

    - wherein the securing element (40) in the securing position at least in portions encloses the mating fastening structure (33), and wherein the mating fastening structure (33) is externally accessible when the securing element (40) is situated in the releasing position (L).
15. Elongate sweeper element (20) for releasably fastening to a fastening installation (14) of a sweeping device (10) according to claim 14, having an elongate sweeper tuft or wire bundle (24), and having a base socket (22) from metal which is designed as a ferrule or a compression sleeve and in which a proximal end of the sweeper tuft or wire bundle (24) is fixed, wherein the base socket (22), on a proximal end portion (2), has a fastening structure (23) which is configured so as to correspond to a mating fastening structure (33) on a distal end portion (3) of the fastening installation (14), wherein the fastening structure (23) has:

    a) a radially symmetrical geometry, furthermore a head (26) and, axially adjacent thereto, a shank portion (28), wherein the head (26) is radially enlarged in relation to the shank portion (28), or

    b) a receptacle (30) having a neck portion (38) and, axially adjacent thereto, a head portion (36), wherein the head portion (36) has a radial cross section which is larger than the neck portion (38) .

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