EP2835181B1 - Device for dispensing flowing substances - Google Patents

Description

The invention relates to a device for dispensing flowable substances, in particular adhesives, paints, varnishes and release agents.

Such devices are used, for example, to apply in portions adhesives on a substrate. The application of the adhesives is controlled by a metering valve, in particular a line, dot, spray, spiral or surface application is possible.

A problem in the processing of flowable substances with metering valves that residues of the substance can accumulate at the outlet of the metering valve and, especially if they harden there, can interfere with the subsequent operation of the device or even bring to a standstill.

To avoid such difficulties is in the DE 41 13 445 A1 a device proposed, which is formed according to the features of the preamble of claim 1.

In this device, the actuating means has a slide whose end is slidably formed via an outlet opening of the nozzle and this opens or closes immediately. The slider is a rectangular cross-section, elongated metal plate which is arranged in a slide housing in which there is a return spring which holds the slider in the closed position. The actual closure thereby forms a closure piece located in a recess on the closure-side end of the slide, which consists of a silicone sponge soaked in oil or non-stick agent or of a wedge-shaped plastic part inclined towards the outlet opening of the nozzle. The slider housing is fixedly connected to a support arm on which a receiving holder for a metering valve, which has the nozzle, is attached. On the support arm there is also a compressed air connection, the admission of which the slide is pushed into the open position and thereby the opening in the slide passes under the outlet opening, whereby the substances can be applied to the substrate. When transferring the closure piece in its closed position, a leading edge of the closure piece initially comes into contact with the free end of the nozzle before the closure piece with its surface facing the nozzle end faces the free end of the nozzle and closes the outlet opening of the nozzle. This action of the free nozzle end on the leading edge during each closing operation of the closure piece leads to increased wear of the leading edge and thus to a reduced service life of the device. Apart from this, the actuating means used in the device requires relatively large Space. This is particularly disadvantageous when several devices, thus several nozzles are relatively close to each other side by side to be arranged and therefore there is little space in this direction of the arrangement of devices available.

A device for dispensing flowable materials is further in the DE 199 36 670 C1 described. This device comprises a fixed support, a metering valve with discharge nozzle for the flowable substances which is connected to the carrier, and also an outer closure part for closing the outlet opening of the nozzle. Here, the closure part is arranged stationary and it is the metering valve or the nozzle pivoted relative to the closure part. In this design too, a leading edge of the closure part contacts the nozzle in the region of the free nozzle end during the respective closing operation, with the described disadvantage of increased wear of the closure part in the region of the leading edge. This device also builds compact because of the pivotal arrangement of the metering valve.

A device for dispensing flowable substances with a nozzle and a closure member for the nozzle is further from the EP 0 719 592 A2 known. Also in this device contacted a leading edge of the closure member when transferring the closure member in its closed position, the nozzle in the region of the free nozzle end.

The object of the present invention is to further develop a device for dispensing flowable substances, which has the features of the preamble of patent claim 1, in such a way that the closure part can be transferred in a non-linear movement from the open position to the closed position in a more compact manner Design of the actuating means in the direction perpendicular to the direction of movement of the closure part.

The object is achieved by a device which is designed according to the features of patent claim 1.

• einen Rahmen,
• ein Formschluss erzeugendes, Räder aufweisendes Übertragungsmedium, das eine Winkelsynchronität von im Rahmen schwenkbar gelagerten Rädern erzeugt,
• einen Antrieb für das Übertragungsmedium, zum Schwenken des jeweiligen Rades in einer Schwenkrichtung und einer hierzu entgegengesetzten Schwenkrichtung,
• ein in Rädern schwenkbar gelagertes Lagerelement für das Verschlussteil, wobei das Lagerelement um Schwenkachsen in diesen Rädern gelagert ist, wobei diese Schwenkachsen parallel zu den Schwenkachsen dieser Räder im Rahmen angeordnet sind,

wobei das Verschlussteil im Lagerelement gelagert ist.According to the invention, it is provided that the adjusting means comprises:

• a frame,
• a form-fitting generating, wheels having transmission medium which generates an angular synchronism of pivotally mounted wheels in the frame,
• a drive for the transmission medium, for pivoting the respective wheel in a pivoting direction and a pivoting direction opposite thereto,
• a pivotally mounted in wheels bearing element for the closure part, wherein the bearing element is mounted about pivot axes in these wheels, said pivot axes are arranged parallel to the pivot axes of these wheels in the frame,

wherein the closure part is mounted in the bearing element.

The movement of the closure part from the open position to the closed position and from the closed position to the open position is thus accomplished by means of the transmission medium. This requires in the direction perpendicular to the direction of movement of the closure part little space, since it is designed compact in this direction. This makes it possible to arrange a plurality of devices, thus having a plurality of nozzle metering units relatively close to the side by side. The transmission medium is a robust, permanently safe drive for moving the closure part. By means of wheels of the transmission medium, the bearing element is defined pivotally mounted in these wheels, whereby a precise guidance of the bearing element is ensured. This ensures a precise process of the closure part between open position and closed position.

The bearing of the bearing element in the wheels causes the bearing element and thus the locking element mounted in the bearing element to perform a non-linear movement when the drive is actuated. The bearing axes of the bearing element in the wheels move, according to the pivoting movements the wheels on a circular path, whereby the closure part moves on a circular path. This basically makes it possible to position the closure part with respect to the nozzle such that a leading edge of the closure part does not come into contact with the nozzle but is moved past the nozzle, so that the closure part only hangs flat on the outlet opening of the nozzle behind the leading edge ,

The device according to the invention allows a simple movement of the closure part from the open position to the closed position and vice versa. This movement is due to the driving of the transmission medium in opposite directions, whereby wheels, for transferring the closure part from the open position to the closed position, in a pivoting direction and, for transferring from the closed position to the open position, in the opposite pivoting direction are moved.

According to a particular embodiment of the invention, it is provided that the drive has a linear-acting actuator and a spring. By means of the actuator, the transmission medium can be delivered in one direction of travel and by means of the spring the transmission medium in the opposite direction can be reset. In particular, it is provided that the closure part is adjustable by means of the actuator in its open position and by means of the spring in its closed position. The actuator is designed for example as a pneumatically acting cylinder.

In the context of the drive for the transmission medium is preferably stored. In this case, the drive in particular has a reciprocable connecting element which is connected to the transmission medium. With this connecting element, the drive acts together. For example, the pneumatic cylinder, when exposed to air, acts on the connector in the sense that it is being moved in one direction of travel. If the pneumatically effective cylinder is depressurized, the spring acts in particular directly on the cylinder, so that the cylinder is reset and in this case the connecting element is returned to the starting position.

Preferably, the connecting element is connected to a straight portion of the transmission medium and can be moved rectilinearly in opposite directions. The connecting element thus engages in that region of the transmission medium to this, in which a connecting element of the associated portion of the transmission medium is formed in a straight line.

The drive for the transmission medium can for example also be designed as a pivot drive, which drives in particular directly one of the wheels of the transmission medium.

Structurally particularly compact device is formed when the frame has two mutually parallel plate-shaped frame sections, between which the transmission medium is arranged. The two frame sections are used for storage of the transmission medium and can therefore be designed with a relatively small wall thickness. This results in a particularly compact design of the frame in the region of the frame sections in the direction of extension of the axes of the wheels of the transmission medium.

The transmission medium has, in particular, a belt drive or a rod connecting the wheels and pivotally mounted in the wheels or a set of gears. For example, in the case of the belt drive, a belt, in particular a toothed belt, steel belt, chain or the like wraps around the wheels of the belt drive. Alternatively, the transmission medium on two wheels which are connected by means of the rod as part of the transmission medium or with a common, forming part of the transmission medium rack, or, when formed as a gear set, three intermeshing, the transmission medium forming wheels, of which the first and third wheel have the same pivoting direction and in which the bearing element is mounted.

This design ensures a clear kinematic relationship between the wheels receiving the bearing element.

From the aspect of a particularly favorable investment of the closure part to the outlet opening of the nozzle, it is considered particularly advantageous if, based on a pivot axis of wheels in the frame connecting line, the pivot axes of the bearing element are arranged in the wheels such that the pivot axes of the Bearing element are arranged in the open position on one side of the straight line and in the closed position on the other side of the straight line. The consequence is that the bearing element and thus the closure part connected to the bearing element can be moved from an over-center position, which correlates with the open position of the closure part, into a dead center position and beyond this into an over-center position that correlates with the closed position of the closure part. This makes it possible in a kinematically simple manner to close the outlet opening of the nozzle when the closure part is placed directly on the outlet opening, thus without initially contacting the nozzle in the region of the leading edge of the closure part.

In particular, the arrangement of the bearing of the bearing element in the wheels is selected such that, in the closed position, a connecting line between the pivot axis of the respective wheel and the pivot axis of the bearing element in this wheel at an angle to the straight line connecting the pivot axis of the wheels of 5 to 25 °, preferably 10 to 20 °, in particular 15 °. Consequently, the bearing element and thus the closure part is pivoted over an angle of 5 to 25 °, preferably 10 to 20 °, in particular 15 ° beyond the dead center in the Übertotpunktlage.

It is considered preferable if, by means of the drive, the respective wheel serving to receive the bearing element can be pivoted through an angle of 50 to 70 °, preferably 55 to 65 °, in particular 61 °. This angle thus corresponds to the angle from the open position to the closed position of the closure part or from the closed position to the open position of the closure part.

From the point of view of the compact design of the actuating means in the direction perpendicular to the direction of movement of the closure part, it is considered to be particularly advantageous if the bearing element has two plate-shaped bearing element sections and connecting elements connecting them. Here, the bearing element sections are arranged parallel to the frame sections. This plate-shaped design of the bearing element sections ensures only a relatively small extent of these bearing element sections in the direction perpendicular to the direction of movement of the closure part.

It is considered particularly advantageous in this context if the frame sections are arranged between the bearing element sections. The frame is thus arranged substantially within the bearing element.

With regard to the design of the closure part, it is considered to be particularly advantageous if the closure part in the region of one end a bearing portion which is connected to the bearing element, and in the region of an opposite end a closure portion for contacting the outlet opening, as well as a bearing portion and the closure portion connecting portion Connecting arm has. Here, it is considered to be particularly advantageous if the closure part has spring property. This feature makes it possible to press the closure part, after contact with the outlet opening of the nozzle, with a certain bias against the nozzle and thus to allow a secure closure of the outlet opening. In principle, it is possible that the closure part is formed in one piece, thus in particular no different material properties in the region of a closure part surface, which faces in the closed position the nozzle end which closes the outlet opening and in the remaining region of the closure part, in particular a storage area of the closure part. In this case, the closure part is preferably made of metal or plastic.

It is considered preferable if a closure part section of the closure part has a base element and a plate received by the base element, the plate having on its side facing away from the base element the closure part surface which serves to close the outlet opening of the nozzle. The base member constitutes the support member for the panel having a different material property than the base member. Preferably, the plate is elastically deformable, in particular has rubber-elastic properties.

The closure part is in particular plate-shaped and has an extension in the axial direction of the wheels, which is smaller than the extension of the bearing element in this direction. This design of the closure part thus contributes to a compact design of the actuating means in the direction perpendicular to the direction of movement of the closure part.

It is particularly preferred under the aspect of the movement of the closure part of the open position of the closure member in its closed position considered when the closure member in the open position next to the nozzle and at a level upstream of the outlet opening, based on the flow direction of the substances through the nozzle arranged is, and by means of the actuating means, the closure part is movable from the open position to the closed position, that the leading edge of the closure part surface is moved past the free end of the nozzle. The nozzle is preferably designed to taper in the direction of the nozzle end.

Accordingly, when the closure part is transferred from the open position into the closed position, the closure part does not first contact the nozzle in the region of its free nozzle end with the leading edge, but the leading edge is guided past the nozzle end, whereby the closure part comes into initial contact with the nozzle behind the leading edge , This prevents damage to the leading edge when moving the closure part from the open position to the closed position. It is particularly advantageous if the closure part contacts the free end of the nozzle as extensively as possible when in contact with the nozzle, thus directly closing the outlet opening of the nozzle. By the movement of the closure part, the outlet opening of the nozzle is cleaned.

The movement of the closure part relative to the nozzle in the region of the outlet opening is preferably selected such that the closure part with a component of movement perpendicular to the flow direction of the substances is moved through this nozzle with respect to the outlet opening. As a consequence, this movement requires, with high efficiency, that the closure part entrains fabric residues that have accumulated in the area of the outlet opening of the nozzle almost completely to the side, thus freeing the nozzle in the area of the outlet opening of fabric residues.

Preferably, the closure part surface, when transferring the closure part from the open position to the closed position and vice versa, is arranged perpendicular to the straight line connecting the wheels and parallel to the pivot axes of the wheels. Consequently, the closure part, from the open position to the closed position and vice versa, moved in parallel. In particular, it is provided that the closure part is arranged perpendicular to the exit axis of the nozzle. The closure part surface is flat, for example.

Preferably, the applicator device having the nozzle is provided with an integrated guide shoe, which moves one below the nozzle Substrate leads. In this case, a narrow and thin configuration of the closure part allows a small distance between the outlet opening of the nozzle and the substrate, for example a maximum distance of 5 mm, in particular 3 mm. Furthermore, the kinematic mechanism allows the nozzle to remain in its dosing position when the preliminary part is transferred to its closed position.

Further features of the invention are set forth in the dependent claims, the description of the drawing of the figures and the figures themselves, wherein it is noted that all individual features and all combinations of individual features are essential to the invention.

Figur 1

für ein erstes Ausführungsbeispiel, eine Seitenansicht der erfindungsgemäßen Vorrichtung, wobei mit strichlierter Linie ein Gehäuse eines eine Düse aufweisenden Dosierventils mit veranschaulicht ist (in einer Ansicht I gemäß Figur 2), wobei ein Verschlussteil der Vorrichtung in einer Öffnungsstellung veranschaulicht ist,

Figur 2

eine Ansicht der Vorrichtung gemäß Pfeil II in Figur 1,

Figur 3

eine Ansicht der Vorrichtung gemäß Pfeil III in Figur 1,

Figur 4

die Vorrichtung in einer geschnittenen Darstellung gemäß der Linie IV-IV in Figur 3,

Figur 5

die Vorrichtung in einer Darstellung gemäß Figur 1, somit ohne Gehäuse des Dosierventils veranschaulicht, allerdings veranschaulicht für das in Schließstellung befindliche Verschlussteil,

Figur 6

die Vorrichtung gemäß Figur 5 in einer Schnittdarstellung gemäß Figur 4,

Figuren 7 bis 10

die Vorrichtung, somit ohne Gehäuse des Dosierventils gezeigt, bei in Öffnungsstellung befindlichem Verschlussteil, in unterschiedlichen räumlichen Ansichten veranschaulicht,

Figur 11

eine Detaildarstellung des Verschlussteils im Bereich dessen dem Verschließen der Austrittsöffnung der Düse des Dosierventils dienenden Endes, veranschaulicht in vergrößerter Darstellung für die Öffnungsstellung und die Schließstellung des Verschlussteils, in Bezug zu dem dem Verschlussteil zugewandten Ende der Düse,

Figur 12

eine Seitenansicht der Anordnung gemäß Figur 1, mit zusätzlich veranschaulichtem Führungsschuh,

Figur 13

die Anordnung gemäß Figur 12 in einer Ansicht gemäß Pfeil 13 in Figur 12,

Figur 14

für ein zweites Ausführungsbeispiel die Vorrichtung, somit ohne Gehäuse des Dosierventils gezeigt, bei in Öffnungstellung befindlichem Verschlussteil, in einer räumlichen Ansicht gemäß der Darstellung der Figur 7 betreffend das erste Ausführungsbeispiel veranschaulicht,

Figur 15

eine Schnittdarstellung der Vorrichtung gemäß Figur 14, veranschaulicht für das in Öffnungsstellung befindliche Verschlussteil der Vorrichtung,

Figur 16

eine Schnittdarstellung der Vorrichtung gemäß Figur 14, veranschaulicht für das in Schließstellung befindliche Verschlussteil der Vorrichtung,

Figur 17

für ein drittes Ausführungsbeispiel die Vorrichtung, somit ohne Gehäuse des Dosierventils gezeigt, bei in Öffnungstellung befindlichem Verschlussteil, in einer räumlichen Ansicht gemäß der Darstellung der Figur 7 betreffend das erste Ausführungsbeispiel veranschaulicht,

Figur 18

eine Schnittdarstellung der Vorrichtung gemäß Figur 17, veranschaulicht für das in Öffnungsstellung befindliche Verschlussteil der Vorrichtung,

Figur 19

eine Schnittdarstellung der Vorrichtung gemäß Figur 17, veranschaulicht für das in Schließstellung befindliche Verschlussteil der Vorrichtung,

In the figures, the invention is illustrated by preferred embodiments, without being limited thereto. It shows:

FIG. 1

for a first embodiment, a side view of the device according to the invention, wherein a housing of a nozzle having a metering valve is illustrated with a dashed line (in a view I according to FIG FIG. 2 ), wherein a closure part of the device is illustrated in an open position,

FIG. 2

a view of the device according to arrow II in FIG. 1 .

FIG. 3

a view of the device according to arrow III in FIG. 1 .

FIG. 4

the device in a sectional view along the line IV-IV in FIG. 3 .

FIG. 5

the device in a representation according to FIG. 1 , thus illustrated without housing of the metering valve, however illustrates for the closing part in the closed position,

FIG. 6

the device according to FIG. 5 in a sectional view according to FIG. 4 .

FIGS. 7 to 10

the device, thus shown without the housing of the metering valve, in the opening position located in the closure part, illustrated in different spatial views,

FIG. 11

a detail view of the closure part in the region of the closing of the outlet opening of the nozzle of the metering valve serving end, illustrated in an enlarged view of the open position and the closed position of the closure part, with respect to the closure part facing the end of the nozzle,

FIG. 12

a side view of the arrangement according to FIG. 1 , with additionally illustrated guide shoe,

FIG. 13

the arrangement according to FIG. 12 in a view according to arrow 13 in FIG. 12 .

FIG. 14

for a second embodiment, the device, thus shown without housing of the metering valve, in befindlichem in opening position closure member, in a three-dimensional view according to the illustration of FIG. 7 illustrating the first embodiment,

FIG. 15

a sectional view of the device according to FIG. 14 , Illustrates for the open-ended closure part of the device,

FIG. 16

a sectional view of the device according to FIG. 14 , Illustrates for the closing part of the closure device of the device,

FIG. 17

for a third embodiment, the device, thus shown without the housing of the metering valve, in befindlichem in opening position closure member, in a three-dimensional view according to the illustration of FIG. 7 illustrating the first embodiment,

FIG. 18

a sectional view of the device according to FIG. 17 , Illustrates for the open-ended closure part of the device,

FIG. 19

a sectional view of the device according to FIG. 17 , Illustrates for the closing part of the closure device of the device,

The inventive device, with respect to the first embodiment in the FIGS. 1 to 13 is shown, serves for dispensing flowable substances, in particular adhesives, paints, varnishes and release agents for the purpose of application to a substrate. The output of the flowable materials is controlled by a metering valve, which greatly simplifies only with respect to the housing 1 by means of the dashed line and the nozzle 2 mounted in the housing 1 in the FIG. 1 is illustrated. In the other figures, the housing 1 is not shown, but only the nozzle 2.

Various types of application of adhesives to a substrate are possible via the metering valve, for example, line, dot, spray, spiral or surface application possible.

In the region of its free nozzle end 3, the nozzle has an outlet opening 4 for dispensing the substances from the nozzle 2. Outside the nozzle 2, a closure part 5 is arranged, which can be moved by an adjusting means 6. The closure member 5 is in its open position, as shown in the FIGS. 1 to 4 and FIGS. 7 to 10, the discharge opening 4 is free and closes in the in the FIGS. 5 and 6 illustrated closed position the outlet opening. 4

The adjusting means 6 has a frame 7. This frame 7 is screwed to the housing 1 by means of screws 8. The housing 1 is stationary. The frame 7 has a housing 10 of a pneumatic cylinder designed as an actuator 11 and on the side facing away from the housing 1 two mutually parallel plate-shaped frame sections 12. The actuator 11 has a connection 13 for supplying compressed air and a cylinder space 14 assigned in the housing 10 for displaceably receiving a piston 15. The piston 15 is displaceable under the action of compressed air against the force of a spring 16.

The frame sections 12 are screwed in the region of the ends of the housing 10, to which the terminal 13 and the spring 16 are assigned, with lugs 39 attached to the housing 10.

In frame 7, specifically in the two frame sections 12, a transmission medium 17 is mounted, which is designed as a belt drive. This has two wheels 18, 19 designed as gears and a belt 20 which wraps around them and which is designed as a toothed belt. The two wheels 18 and 19 are identical and it connects the bearing axles 21 of the wheels 18 and 19 a straight line 22 which is arranged parallel to the stroke direction of the piston 15. As a result, belt sections 23 run between the two wheels 18, 19 parallel to the straight line 22 and to the longitudinal axis of the piston 15.

With the piston 15, a connecting element 24 is connected, which is arranged radially and a slot 25 in the housing 10 passes through, said from the Housing 10 emerging end of the connecting element 24 with the belt 20 in the region of one, the housing 10 facing belt portion 23 is fixedly connected. Accordingly, a stroke movement of the piston 15 under the action of compressed air causes the belt 20 to be moved counterclockwise by a corresponding distance and the return movement of the piston beyond the action of compressed air and under the action of the spring 16 to return the belt 20 by the corresponding stroke distance of the piston 15. By means of the pneumatic drive or the spring thus the wheels 18 and 19 are pivoted in a pivoting direction and in a pivoting direction opposite thereto in each case by the same pivot angle.

In the two wheels 18, 19, a bearing element 26 for the closure part 5 at a distance from the pivot axes of the wheels 18, 19 is pivotally mounted. Here, the bearing member 26 is pivotally mounted about axes 27 of the wheels 18, 19, which are arranged parallel to the pivot axes 21 of the wheels 18, 19. The bearing element 26 has two plate-shaped bearing element sections 28 and these connecting connecting elements 29. The bearing sections 28 are arranged parallel to the frame sections 23, furthermore, the frame sections 23 are arranged between the bearing element sections 28. The two frame sections 12 receive the transmission medium 17 or the wheels 18, 19 with little axial play and the respective bearing element section 28 is arranged at a small distance from the associated frame section 12. This is in particular the representation of the FIG. 2 to see that illustrates the adjusting means 6 in the direction of the bearing axes 21 is designed very compact.

The closure part 5 has in the region of one end a bearing portion 30, which is connected to the bearing element 26 in the region of the wheel 19 adjacent connecting elements 29. In the region of the opposite end, the closure part 5 has a closure part section 31 for contacting the outlet opening 4. Furthermore, the closure part 5 has a bearing section 30 and the closure portion 31 connecting connecting arm 32. The closure member 5 is plate-shaped and has an extension in the axial direction of the wheels, thus in extension of the bearing axes 21, which is less than the extension of the bearing element 26 in this direction.

When comparing the FIGS. 1 and 5 or 4 and 6 and the detailed representation according to FIG. 11 It can be seen that the closure part surface 33, thus the surface of the closure part 31 which serves to close the outlet 4 of the nozzle 2 in the closed position of the closure part 5, is located in the open position next to the nozzle 2 and at a level upstream of the outlet 4 on the flow direction of the substances through the nozzle 2, is arranged. Furthermore, it can be seen that by means of the adjusting means 6, the closure member 5 is movable from the open position to the closed position such that a leading edge 34 of the closure member 33 is moved past the tapered, free nozzle end 3. This concludes, in the closed position of the closure member 5, a connecting line between the pivot axis of the respective wheel and the pivot axis of the bearing element in this wheel, illustrated for the one wheel 18 through the connecting line 35, an angle with the straight line 22, the pivot axes 21 of Wheels 18, 19 connects, from 5 to 25 °, preferably 10 to 20 °, in particular 15 °. This angle α is in FIG. 11 illustrated for the area of the nozzle 2, wherein the angle α there, for clarity, is shown significantly larger. Overall, by means of the drive, the respective wheel 18, 19 pivotable through an angle of 50 to 70 °, preferably 55 to 65 °, in particular 61 °. This pivot angle β is, again for the area of the nozzle 2, in FIG. 11 illustrated.

The closure portion 31 has a base member 36 and a plate 37 received by the base member 36. The plate 37 has on its side facing away from the base member 36, the closure part surface 33. The plate 37 is elastically deformable, in particular it has rubber-elastic properties on. The base member 36, the connecting arm 32 and the bearing portion 30 are made of metal and have spring characteristics.

The closure part 33 is flat. When transferring the closure part 5 from the open position into the closed position and vice versa, the closure part surface 33 is arranged perpendicular to the straight line 22 connecting the wheels and parallel to the pivot axes 21 of the wheels 18, 19. Consequently, in the process the closure part is moved parallel from the open position to the closed position and vice versa. The closure part surface 33 is arranged perpendicular to the outlet axis 9 of the outlet opening 4 of the nozzle 2.

The leading edge 34 of the closure surface 33 coincides with a leading edge 38 of the base member 36.

As the representation of FIGS. 1 and 4 can be seen, is the closure member 5 in the region of the closure member 33 in the open position next to the tapered, in particular conically tapered nozzle end 3. Due to the kinematics of the actuating means 6, starting from this open position, the closure member 5 is moved so that the leading edge 34 is moved past the free end of the nozzle. It thus sets the plate 37 only behind the leading edge 34 to the nozzle 2 in the region of the nozzle end 3 at. If the closure part surface 33 contacts the nozzle 2, the closure part 5 and thus the closure part surface 33 are moved further with a movement component perpendicular to the exit axis 9 of the exit opening 4 of the nozzle 2 relative thereto. The movement causes the plate 37 fabric remnants, which have accumulated in the region of the outlet opening 4 of the nozzle 2, to the side, thus freeing the nozzle 2 in the region of the outlet opening 4 of fabric residues.

The plate 37 is thus moved in parallel by means of the adjusting means 6 such that the closure part surface 33 is moved arcuately from the open position to the closed position, specifically, starting from an over-center position in the open position, in a dead center before contacting the nozzle 2 by means of Plate 37 and from there to an over-center position in the closed position of the plate 37. The spring property of the closure part 5 here ensures that the closure part 33 is pressed against the nozzle 2 after contact with the outlet 4 of the nozzle with a certain bias and thereby a secure closure of the outlet opening 4 is ensured. This also contributes to the elastically deformable design of the plate 37.

The FIGS. 12 and 13 show that in the FIGS. 1 to 11 illustrated device is additionally provided with an integrated guide shoe 40 which is intended to guide a moving below the nozzle 2 substrate in the region of the bottom 41 of the guide shoe 40. In this case, the narrow and thin configuration of the closure part 5, in particular in the region of the closure part section 31, allows a small distance between the outlet opening of the nozzle 2 and the substrate resting against the underside 41, for example a distance of max. 5 mm, in particular 3 mm. Furthermore, the kinematics of the closure member 5 allows the nozzle 2 to remain in its metering position when the closure member is transferred to its closed position. Also, the guide shoe 40, as in particular the representation of FIG. 13 can be seen, designed quite narrow and in particular a constant strength, so that a quasi plate-shaped design of the guide shoe 40 results.

The second embodiment according to the FIGS. 14 to 16 and the third embodiment according to the FIGS. 17 to 19 differs from the first embodiment, as in the FIGS. 1 to 13 is described, only by the formation of the transmission medium 17, which generates the angular synchrony of the pivotally mounted in the frame 7 wheels 18, 19. In order to avoid repetition concerning the description of the second and third embodiments, components which correspond to the first embodiment are designated by the same reference numerals for the sake of simplicity.

In the second embodiment according to the FIGS. 14 to 16 the two wheels 18, 19 are not looped by a belt 20, but it is instead of the belt between the wheels 18 and 19, which are formed as gears, another wheel 42, which is also formed as a gear arranged. This component of the transmission medium 17 forming wheel 42 is pivotally mounted about a bearing axis 43 in the frame 7, specifically in the frame portion 12, said bearing axis 43 is perpendicular to the bearing axles 21 of the wheels 18 and 19. The wheel diameter of the wheel 42 is significantly smaller than the diameter of the respective wheel 18, 19. The wheels 18, 19 are identical, thus formed as identical gears, whereby by means of the wheel 18, the wheel 22 and by means of this wheel 22, the wheel 19 synchronously is drivable. This design of the transmission medium 17 as a gear set thus causes the same synchronous movement of the wheels 18 and 19 as the formation of the transmission medium 17 in the first embodiment, which has the belt drive.

The wheel 18 is driven by means of the actuator 11, wherein the connecting member 24 connected to the piston 15 is pivotally connected to a rod 24 which is pivotally connected to the wheel 18. The bearing axis 45 of connecting element 24 and rod 44 and the bearing axis 46 of rod 44 and wheel 18 are each arranged parallel to the bearing axes 21.

FIG. 14 and FIG. 15 show the arrangement of the actuator 11, the connecting element 24 and the rod 44 in the open position of the closure part 5.

FIG. 16 shows the arrangement of the actuator 11, the connecting element 24 and the rod 44 in the closed position of the closure part. 5

The third embodiment differs from the first embodiment in that instead of a belt 20, in particular toothed belt, which wraps around the wheels 18, 19, in particular gears, the two identically formed gears 18, 19 are in engagement with a rack 47, which forms part of the transfer medium 17. This rack is connected by means of the connecting element 24 with the actuator 11. The rack 47 causes the synchronous rotation of the wheels 18, 19. Method is the rack by means of the actuator 11 in the direction of travel of the piston 15th

Figures 17 and 18 show the rack 47 in its one end position in which the movable closure member 5 is in the open position. FIG. 19 shows the rack 47 in the other end position in which the closure member 5 is in its closed position.

LIST OF REFERENCE NUMBERS

1

casing

2

jet

3

nozzle end

4

outlet opening

5

closing part

6

actuating means

7

frame

8th

screw

9

exit axis

10

casing

11

actuator

12

frame section

13

connection

14

cylinder space

15

piston

16

feather

17

transmission medium

18

wheel

19

wheel

20

belt

21

bearing axle

22

Just

23

belt section

24

connecting element

25

Long hole

26

bearing element

27

swivel axis

28

Bearing member section

29

connecting element

30

bearing section

31

Closing part section

32

connecting arm

33

Closing part surface

34

leading edge

35

connection grade

36

base element

37

plate

38

leading edge

39

flap

40

guide shoe

41

bottom

42

wheel

43

bearing axle

44

pole

45

bearing axle

46

bearing axle

47

rack

Claims (15)

1. Apparatus for dispensing flowable materials, having a nozzle (2) which has an outlet opening (4) in the region of a free nozzle end (3) for dispensing the materials from the nozzle (2), and having a closure part (5) which is arranged outside the nozzle (2), can be moved by way of an actuating means (6), and opens the outlet opening (4) in an open position and closes the outlet opening (4) in a closed position, characterized in that the actuating means (6) has:

   - a frame (7),

   - a transmission medium (17) which generates a positively locking connection, has wheels (18, 19), and generates an angular synchronicity of wheels (18, 19) which are mounted pivotably in the frame (7),

   - a drive (11, 16) for the transmission medium (17), for pivoting the respective wheel (18, 19) in one pivoting direction and a pivoting direction which is opposed thereto,

   - a bearing element (26) for the closure part (5), which bearing element (26) is mounted pivotably in wheels (18, 19), the bearing element (26) being mounted such that it can be pivoted about pivot axes (27) in the said wheels (18, 19), the said pivot axes (27) being arranged in the frame (7) parallel to the pivot axes (21) of the said wheels (18, 19),

   the closure part (5) being mounted in the bearing element (26).
2. Apparatus according to Claim 1, characterized in that the drive (11, 16) has a linearly acting actuator (11) and a spring (16), it being possible for the transmission medium (17) to be fed in in one running direction by means of the actuator (11), and it being possible for the transmission medium (17) to be restored in the opposite running direction by means of the spring (16).
3. Apparatus according to Claim 1 or 2, characterized in that the drive (11, 16) for the transmission medium (17) is mounted in the frame (7), the drive (11, 16) having a connecting element (24) which can be moved to and fro and is connected to the transmission medium (17) .
4. Apparatus according to Claim 3, characterized in that the connecting element (24) is connected to a straight section of the transmission medium (17) and can be moved rectilinearly in opposite directions.
5. Apparatus according to one of Claims 1 to 4, characterized in that the frame (7) has two plate-shaped frame sections (12) which are arranged parallel to one another and between which the transmission medium (17) is arranged.
6. Apparatus according to one of Claims 1 to 5, characterized in that the transmission medium (17) has a belt drive (17), or a rod which connects the wheels (18, 19) and is mounted pivotably in the wheels (18, 19), or a rack (47) which meshes with the wheels (18, 19), or a gear set (18, 19, 42).
7. Apparatus according to Claim 6, characterized in that the transmission medium (17) is configured as a belt drive (17) and the wheels (18, 19) are configured as gearwheels and the belt (20) is configured as a toothed belt.
8. Apparatus according to one of Claims 1 to 7, characterized in that, in relation to a straight line (22) which connects the pivot axes (21) of wheels (18, 19) in the frame (7), the pivot axes (27) of the bearing element (26) are arranged in the wheels (18, 19) in such a way that the pivot axes (27) of the bearing element (26) are arranged on one side of the straight line (22) in the open position and on the other side of the straight line (22) in the closed position.
9. Apparatus according to Claim 8, characterized in that, in the closed position, a connecting straight line (35) between the pivot axis (21) of the respective wheel (18 or 19) and the pivot axis of the bearing element (26) in the said wheel (18 or 19) encloses an angle with the straight line (22) which connects the pivot axes (21) of the wheels (18, 19) of from 5 to 25°, preferably of from 10 to 20°, in particular of 15°.
10. Apparatus according to one of Claims 1 to 9, characterized in that the respective wheel (18 or 19) can be pivoted by means of the drive (11, 16) by an angle of from 50 to 70°, preferably of from 55 to 65°, in particular of 61°.
11. Apparatus according to Claim 5 or according to one of Claims 6 to 10, if dependent on Claim 5, characterized in that the bearing element (26) has two plate-shaped bearing element sections (28) and connecting elements (29) which connect them, the bearing element sections (28) being arranged parallel to the frame sections (12), and the frame sections (12) being arranged between the bearing element sections (28) .
12. Apparatus according to one of Claims 1 to 11, characterized in that the closure part (5) has, in the region of one end, a bearing section (30) which is connected to the bearing element (26) and, in the region of an opposite end, a closure part section (31) for making contact with the outlet opening (4), and a connecting arm (32) which connects the bearing section (30) and the closure part section (31).
13. Apparatus according to one of Claims 1 to 12, characterized in that the closure part (5) is of plate-shaped configuration and has an extent in the axial direction of the wheels (18, 19) which is smaller than the extent of the bearing element (26) in the said direction.
14. Apparatus according to one of Claims 1 to 13, characterized in that, in the open position, a closure part face (33) of the closure part (5), which closure part face (33) serves to close the outlet opening (4), is arranged next to the nozzle (2) and on a level upstream of the outlet opening (4), in relation to the flow direction of the materials through the nozzle (2), and the closure part (5) can be moved by means of the actuating means (6) from the open position into the closed position in such a way that a leading edge (34) of the closure part face (33) is moved past the free nozzle end (3).
15. Apparatus according to Claim 14, characterized in that, during the transfer of the closure part (5) from the open position into the closed position and vice versa, the closure part face (33) is arranged perpendicularly with respect to the straight line (22) which connects the wheels and parallel to the pivot axis (21) of the respective wheel (18 or 19).

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