EP1081327B1 - Winding roller - Google Patents

Abstract

The cord to be wound is guided onto the core (30) and its axial position depends upon the angle position of the core. The roller incorporates an eccentric disk (20) located rotatably movably coaxially to the winding core (30) and which has a cylinder surface (23) coaxial to the winding core. In the cylinder surface is an all-round guide groove (24) inclined to the axis of the winding core. A step gear is available, which converts the continuous rotary movement of the winding core into a staged linear movement of the cord guide member. The winding core has a bearing (33) for a driver component movable between rest and engagement positions, preferably an axially movable pin. The eccentric disk has at least one recess (12) in which the driver component secures in the engagement position.

Description

The present invention relates to a winding roll according to the preamble of claim 1 and a Roman blind, a pleated curtain, a blind, a Venetian blind or other, to be operated by drawstrings window decoration.

A winding roll of the type mentioned is known from DE 297 06 686 U1, which discloses a Raffvorhang with several vertically extending over the height of the curtain drawstrings, which are diverted horizontally at the top curtain edge and wound together on a laterally mounted winding roll. By winding the drawstrings on the winding roll they are shortened and therefore pull up the curtain by pulling it together. The winding roll consists of a winding core and laterally arranged on the winding core cheeks. In a frame of the winding core and the cheeks are designed in a special way, thereby preventing tangling of the pull cords. The disadvantage here is that the special bobbins are expensive to produce and are generally optimized for a certain number and size of the pull cords.

GB 2 156 393 A discloses a device for uniformly winding a redrawn electric cable onto a cable reeling drum mounted on a mining vehicle. The mine vehicle is supplied with power via this cable. The device itself comprises a rotatable cylindrical cam which is rotated in a predetermined ratio to the rotational speed of the drum. The cable passes through a reversible cable guide to the drum which is mounted on a pivoting, swingable assembly which includes a cam follower which engages a cam track formed in the surface of the cam disk. This will cause the cable guide to swing when the Cam rotates, on a flat arc, approximately a straight line which is parallel to the axis of rotation of the drum, whereby the guide is moved at a predetermined constant speed over the entire axial extent of the drum parallel to the drum axis. The cam track on the rotatable cam is configured to cause an immediate change of direction in the movement of the cable guide when the cable guide arrives at one of the ends of the cable reeling drum.

The CH 325 762 A has a device for actuating a blind, which comprises a plurality of pull cords that hold the blind at its base and allow it to regulate its propagation. This venetian blind actuator comprises a plurality of pull cords which hold the blind at its base and allow it to regulate its propagation, comprising separate take-up reels for each drawstring, and means for simultaneously driving these different reels and which reels are of identical shape and on one common shaft are arranged. The winding roll has divided by cutting discs sections on the winding core, so that the pull cords are kept separate from each other for all revolutions of the roll.

EP 0 162 025 A discloses an operating mechanism for a folding door which has a flexible plate which can be raised by means of operating cables which run downwards on the plate and are fastened to its lower edge. An upper cross member, which can be fixed to a wall or a ceiling, carries the plate and the actuating cables run over rollers which are arranged in this cross member, and are rolled up on a drum, which is rotationally rigidly connected to a toothed roller, into which a Endless chain engages. This sprocket and the drum are rotatably mounted in a housing which can be attached to the upper cross member and with means for blocking the movement of the chain in the direction the lowering of the store plate is provided. In this actuating mechanism, the winding roll is provided with grooves, which can each accommodate one of the pull cords and thus keep them separately from each other. The disadvantage of this is that the furrows are filled after one revolution of the role of the drawstrings and therefore lose their ordering effect for subsequent revolutions of the winding roll.

EP 0 355 244 A relates to a device for raising and lowering package blinds and folding blinds provided with means for neatly winding up the store driving ropes, comprising a drive rod rotated by drive means with which torsionally rigid and axially slidably connected at least one externally threaded sleeve which engages a nut formed in a solid support post to axially displace the sleeve when the rod is rotated.

The invention has for its object to ensure at a winding roll of the type mentioned that the drawstrings to be wound are wound without interference and evenly and orderly distributed over the winding core trouble-free. Furthermore, the winding roll should be used universally with various embodiments of a Roman blind and allow easy removal and attachment of the drawstrings.

This object is solved by the features of claim 1.

Accordingly, the winding roll in a known manner a fixed housing and a rotatably mounted therein winding core for receiving at least one drawstring on. It is characterized in that an axially movable thread guide member is arranged on the winding roll, through which the drawstring to be wound is guided on the winding core and its axial position depends on the angular position of the winding core, wherein the winding roll includes an eccentric, the coaxial rotatable is mounted to the winding core and which has a coaxial with the winding cylinder arranged cylindrical surface in which an inclined to the axis of the winding core circumferential guide groove is arranged and wherein the thread guide member for the purpose of axial positional displacement engages with a pin in the guide groove. In addition, a step transmission is provided, which converts the continuous rotational movement of the winding core into a stepped linear movement of the thread guide member.

With such a winding roll an orderly winding and unwinding of the pull cords is ensured, since the thread guide member moves in accordance with a structurally predetermined program in the axial direction and thereby predetermines the feed point of the pull cord to the winding core. This also guarantees that the distribution of the drawstring occurs evenly over the winding core, which prevents tangling and ensures as gentle as possible loading of the winding roll. The rotational movement of the winding core can be exploited for the drive of the axial movement of the thread guide member, thereby ensuring at the same time that such axial movement takes place only in case of need.

There are various possibilities for the realization of the winding roll according to the invention. Thus, the conversion of the rotational movement of the winding core into an axial displacement movement of the thread guide member is preferably carried out with the aid of an eccentric disc. This is coaxial rotatably mounted to the winding core and has a coaxial with the winding core arranged cylindrical surface. In the Cylinder surface is arranged an inclined to the axis of the winding core circumferential guide groove, wherein the thread guide member engages for the purpose of axial positional displacement with a pin in the guide groove.

During operation of the winding roll, the eccentric disk can be rotated with the winding core. In this way, the cylindrical surface rotates, whereby in turn the pin of the thread guide member is axially displaced by the guide groove in the cylindrical surface, since the guide groove is inclined relative to the axis of the winding core. The axial course of the guide thus determines the "program", after which the thread guide member moves axially. In the simplest case, the guide groove extends in a (inclined to the axis of the winding core) plane, so that during a full rotation of the eccentric disc, the thread guide member performs a complete back and forth movement along an axial trajectory. However, other programs are conceivable in which the thread guide member runs back and forth several times during a full rotation of the eccentric disc.

Preferably, a step transmission is provided, which converts the continuous rotational movement of the winding core into a stepped linear movement of the thread guide member. That is, the rotation of the winding core is not constantly, but only in phases transmitted to the thread guide member and leads to its axial displacement. In particular, such a stepping operation has the advantage that a movement period (back and forth) of the thread guide member is not necessarily completed after one movement period (full rotation) of the winding core. The axial movement can therefore be slower in this sense than the rotation of the winding core. This leads to a better position and distribution of the drawstring or the drawstrings on the winding core.

If, as stated above, an eccentric disc is present, the indexing gear is preferably designed so that during a first rotation angle interval of preferably 60 °, the eccentric disc is taken from the rotation of the winding core while it stops for the remainder of the full rotation of the winding core. This means that six complete revolutions of the winding core are required to rotate the eccentric disk once by a total of 360 °. If the guide groove on the eccentric disc as explained above lies in one plane, one complete revolution of the eccentric disc corresponds to a complete axial movement period of the thread guide member. A back and forth movement of the thread guide member thus requires six full turns of the winding core, or in other words, per full revolution of the winding core, the yarn guide member moves to one sixth of its total path (round trip) or one third of its axial amplitude of motion (back and forth).

• a.) der Wickelkern ein Lager für ein zwischen einer Ruheposition und einer Eingriffsposition bewegliches Mitnehmerelement aufweist,
• b.) das Gehäuse eine Führungsfläche aufweist, auf der das Mitnehmerelement bei einer Drehung des Wickelkerns gleitet, wobei mindestens ein Versatz in der Führungsfläche eine Bewegung des Mitnehmerelementes von der Ruheposition in die Eingriffsposition und/oder umgekehrt bewirkt,
• c.) das Mitnehmerelement nur in der Eingriffsposition mit der Exzenterscheibe gekoppelt ist und dadurch die Drehbewegung des Wickelkerns auf die Exzenterscheibe überträgt.

A stepper drive of the eccentric disc can preferably be realized in that

• a.) the winding core has a bearing for a movable between a rest position and an engagement position driver element,
• b.) the housing has a guide surface on which the driver element slides during rotation of the winding core, wherein at least one offset in the guide surface causes a movement of the driver element from the rest position into the engaged position and / or vice versa,
• c.) the driver element is coupled only in the engaged position with the eccentric disc and thereby transmits the rotational movement of the winding core on the eccentric disc.

The driver element, which is preferably an axially movable pin, thus provides for the phase-wise coupling of the eccentric disc to the winding core. In these coupling phases, the eccentric disc thus makes the rotational movement of the winding core, while it remains outside of the coupling phases. The number and duration of the coupling phases is determined in a simple manner by the design of the guide surface on the housing, d. H. by the number and angular extent of the offset (s) in this area. An offset is to be understood as meaning an axial projection or recess, depending on which direction the driver element has to be moved in order to engage the engagement position. If the angular extent α of the offset is an integer fraction of 360 °, z. B. α = 360 ° / n, the movement of the thread guide member has completed its axial movement period after n revolutions of the winding core. The relationship between a full revolution of the winding core and the associated traversing distance of the thread guide member is ultimately reflected in the pattern in which the string is deposited on the winding core. In this way, the shape and uniformity of this pattern can thus be influenced.

The eccentric disc has at least one recess into which the driver element can engage in the engaged position. The engagement of the driver element in a recess ensures a secure coupling of eccentric disc and winding core, so that it can not come as a friction coupling to slippage between these elements.

In this case, the eccentric disc a plurality, preferably six, arranged at equal angular intervals around the axis recesses for the engagement of the driver element. An arrangement of n equidistant recesses advantageously acts with a guide surface on Housing together, which has an offset of length α = 3600 ° / n. Then, namely, the driver element is brought during a full rotation of the winding core during a rotation angle α into engagement with a recess of the eccentric disc, ie the eccentric is further rotated by α. At the end of the rotation are thus again n recesses of the eccentric disc in the same position as at the beginning of the rotation. At the next full revolution of the winding core is therefore again a recess in a suitable position for engagement of the driver element.

The invention further relates to a Venetian blind, a pleated blind, a blind, a Venetian blind or other, to be operated by drawstrings window decoration, consisting of a curtain and a number of drawstrings, which are attached to one end of the curtain and extend to a winding roll, the window decoration characterized in that the winding roll is configured in the manner described above according to the invention. The proper and tangle-free winding is especially important in the drawstrings of a window decoration, since the winding roll is usually inaccessible to the user and thus this can not observe or influence the winding process. It is therefore important that nevertheless a proper and trouble-free winding is guaranteed.

Further advantageous embodiments of the invention are the subject of the dependent claims.

Fig.1

eine Vorderansicht, einen senkrechten Schnitt, eine Rückansicht und eine Draufsicht des Gehäuses der Wickelrolle in einer ersten erfindungsgemäßen Ausführungsform,

Fig. 2

eine Vorderansicht, einen senkrechten Schnitt und eine Seitenansicht einer Exzenterscheibe der Wickelrolle,

Fig.3

eine Vorderansicht, einen senkrechten Schnitt und eine Rückansicht des Wickelkerns der Wickelrolle,

Fig. 4

eine Vorderansicht und einen senkrechten Schnitt eines Kettenrades der Wickelrolle,

Fig. 5

eine Vorderansicht und einen senkrechten Schnitt einer Abdeckkappe,

Fig. 6

eine Vorderansicht, eine Seitenansicht und einen senkrechten Schnitt eines Fadenführungsgliedes,

Fig. 7

einen senkrechten Schnitt und eine seitliche Draufsicht eines Zapfens,

Fig. 8

eine Vorderansicht und einen senkrechten Schnitt einer Scheibe,

Fig. 9

eine Explosionsansicht der Wickelrolle,

Fig. 10

eine Vorderansicht einer Fensterdekoration mit einer Wickelrolle und

Fig. 11

eine Vorderansicht eines Raffvorhanges mit einer Wickelrolle nach einer weiteren Ausführungsform.

In the following the invention will be explained by way of example with reference to FIGS. Show it:

Fig.1

a front view, a vertical section, a rear view and a top view of the housing of the Winding roll in a first embodiment according to the invention,

Fig. 2

a front view, a vertical section and a side view of an eccentric disc of the winding roll,

Figure 3

a front view, a vertical section and a rear view of the winding core of the winding roll,

Fig. 4

a front view and a vertical section of a sprocket of the winding roll,

Fig. 5

a front view and a vertical section of a cap,

Fig. 6

a front view, a side view and a vertical section of a thread guide member,

Fig. 7

a vertical section and a lateral plan view of a pin,

Fig. 8

a front view and a vertical section of a disc,

Fig. 9

an exploded view of the winding roll,

Fig. 10

a front view of a window decoration with a winding roll and

Fig. 11

a front view of a Roman shade with a winding roll according to another embodiment.

10 shows the exemplary use of the winding roll 100 according to the invention on a Roman blind 90 of a window decoration. Several drawstrings 91 extend vertically over the height of the curtain, are redirected horizontally at the top curtain edge and wound together on a laterally mounted winding roll 100. By winding the drawstrings on the winding roll they are shortened and therefore pull up the curtain by pulling it together. The rotation of the winding roll via an endlessly circulating and accessible to the user pull chain 92nd

With such a winding roll 100 on a window decoration, it is particularly important that the pull cords are laid without tangling and as evenly as possible on the winding core, so that it does not interfere with the operation of the curtain.

The winding roll 100 ensures such trouble-free operation by their particular configuration with a yarn guide member 60. The structure of the essential parts of the winding roll is shown in an exploded view in Fig. 9, wherein the individual components shown in FIGS. 1 to 8 in different views separately are.

As a fixed and z. B. to be connected to the window decoration element, the winding roll initially comprises a housing 10. This is shown in Fig. 1 in the view from the back, in section along the central axis, in the view from the front and in the view from above. Evident is a cylindrical bearing 13, in which the rotatable elements of the winding roll are received and whose axis coincides with the axis of rotation of the winding core. Further, at the top of hole guides 11 can be seen, through which the strings are passed from the side to the winding core. Furthermore, the housing 10 includes two opposing grooves 12 in which the yarn guide member 60 can be axially displaceable (i.e., parallel to the axis of rotation of the winding core 30).

On the outside of the cylindrical bearing 13, the eccentric disc 20 is arranged coaxially and rotatably. The eccentric disc 20 is shown in Fig. 2 in the view of vome, in section and in side view. Evident is the structure with a disk body, which in the middle has a circular hole 22 through which the bearing 13 can be performed. Furthermore, six equidistant recesses 21 in which the pin 60 can engage extend on the edge of the hole 22 in the radial direction. From the cut and the Side view of the eccentric disc 20 is a cylindrical coaxial surface 23 can be seen, which is cut off obliquely with respect to the axis of the eccentric disc. In the guide surface 24, the pin 63 of the thread guide member 60 engage, whereby the latter is displaced in the axial direction upon rotation of the eccentric disc 20. The extent and the sequence of this displacement is determined by the surface 23 and the course of the guide groove 24.

The next element is arranged on the axis of the winding roll, the actual winding core 30, which is shown in Fig. 3 in a view from the front, in section and in a view from behind. It consists of a cylindrical bearing surface 31 on which the cord material comes to rest. To the sides, this bearing surface 31 is closed by cheeks, which prevent slipping of the string. With the core 32, the winding core extends through the hole 22 of the eccentric disk 20 into the cylindrical bearing 13 on the housing 10. Of importance is the recess 33 which is arranged parallel to the axis of the winding core 30 on the inner wall of the bearing surface 31. Herein, the pin 70 is supported so that it can move axially in the recess 33 back and forth. Due to the spring 71 of the pin 70 tends to be pushed out of the recess 33.

Furthermore, the sprocket 40 is arranged on the axis, which is shown in Fig. 4 in the view from behind and in section. About the sprocket 40, the pull chain 92 is guided, with which a user can put the winding roll or the winding core in rotation. The sprocket 40 is coupled to the winding core so that its rotation is transmitted to it.

Further elements for completing the winding roller are the cap 50 shown in FIG. 5 and the disc 80 shown in FIG. 8.

The invention essential thread guide member 60 is shown in Fig. 6 in the view from above, from the side and in section. About the side guide rails 62, it engages in the grooves 12 on the housing 10 and is mounted so axially displaceable. In this arrangement, a protruding from the thread guide member pin 63 down and thus can be brought into engagement with the guide groove 24 on the eccentric disc 20. The thread guide member then follows in the axial direction of the position of the guide groove 24. Furthermore, the thread guide member has a thread opening 61, through which the strings to be wound are guided. Due to the axial displacement of the thread guide member 60, the thread opening 61 and thus the cord is displaced axially, which leads to the desired uniform winding.

In principle, the eccentric disk 20 could be firmly and permanently coupled to the winding core 30 or the sprocket 40, so that they would constantly participate in their rotation. However, the coupling is preferably carried out via a step transmission. As a result, the rotations and displacements are decoupled in their period and it is particularly not necessary that each full revolution of the winding core automatically causes a complete reciprocating motion of the thread guide member 60.

The indexing gear is essentially realized by the pin 70, which can engage in the recesses 21 on the eccentric disc 20. The pin 70 slides on the guide surface 15, which is formed by the end face of the bearing 13 on the housing 10. The pin 70 is "normally" pressed so deep into the bearing 33 on the winding core 30 that its free end does not protrude to the recesses 21 on the eccentric disc 20. On a section 14 of about 60 °, however, the guide surface jumps back in a ramp shape by an offset, so that the pin 70 can emerge further from the bearing 33 in this area. He comes to engage with a recess 21st on the eccentric 20. For the length of the offset 14 of the pin thus couples the winding core 30 with the eccentric disc 20, so that the latter is taken over 60 ° of full rotation. Thereafter, the pin 70 is pushed by the "normal" guide surface 15 back to its rest position in which he is not engaged with a recess 21. The eccentric disc 20 therefore does not participate in the further rotation. It is only pushed by 60 ° per full revolution of the winding core, whereby the yarn guide member 60 can cover a third of its axial amplitude of movement. After the full rotation of the pin 70 reaches the offset 14 again and engages in the next recess 21 on the eccentric disc 20 in order to turn them by a further 60 °, etc.

In Fig. 11, a Roman shade is shown. This consists of the actual curtain 110, which is preferably removably attached to a support rail 113. The curtain 110 is gathered by five pull cords 112. These run from the lower edge of the curtain, where they are fixed, vertically to the upper edge below the support rail 113. They are guided in guide eyelets 111. On the support rail 113, the pull cords are deflected in the horizontal direction and directed to a winding roll 100 'according to the invention. On this they can be wound up, whereby the lower edge of the curtain 110 pulled upwards, d. H. is gathered. The rotation of the winding roll 100 'via an operating chain 114, which runs over the axis of the Wickerolle. A pull on the control chain (arrows) therefore causes the winding roll to rotate so that the pull cords 112 are wound up or unwound.

In the winding roll, a suitable brake is also integrated, which prevents the winding roll from unrolling under the load of the curtain.

Claims (6)

1. Winding roller with a fixed casing (10) and a winding core (30) rotatably positioned therein for receiving at least one drawing cord (91) for a window decoration to be operated,
   characterized in
   that an axially movable thread guiding element (60) is placed on the winding roller (100) through which the drawing cord to be wound up is guided on the winding core (30) and the axial position of which depends on the angular position of the winding core (30), whereby the winding roller (100) contains an eccentric disk (20) which is positioned coaxially rotatably movable to the winding core (30) and which has a cylinder surface (23) placed coaxially to the winding core in which a peripheral guiding groove (24) inclined to the axis of the winding core is placed and whereby the thread guiding element (60) engages with a pin (63) into the guiding groove (24) for the axial position displacement and that there exists a step-by-step motion linkage which transforms the continuous motion of revolution of the winding core (30) into a gradual linear motion of the thread guiding element (60).
2. Winding roller according to claim 1,
   characterized in
   that the eccentric disk (20) is driven by the rotation of the winding core (30) during a first rotation angular interval of preferably 60° while it stands for the rest of the complete rotation of the winding core.
3. Winding roller according to any of the claims 1 or 2,
   characterized in
   that

   a) the winding core (30) has a bearing (33) for a driving element movable between a position of rest and a position of engagement, preferably an axially movable pin (70),

   b) the casing (10) has a guiding surface (15) on which the driving element (70) glides during a rotation of the winding core, whereby at least one offset (14) in the guiding surface causes a movement of the driving element from the position of rest into the position of engagement and/or inversely,

   c) the driving element (70) is coupled with the eccentric disk (20) only in the position of engagement and thus transfers the motion of revolution of the winding core to the eccentric disk.
4. Winding roller according to claim 3,
   characterized in
   that the eccentric disk (20) has at least one recess (21) into which the driving element (70) can engage in the position of engagement.
5. Winding roller according to claim 4,
   characterized in
   that the eccentric disk (20) has several recesses (21), preferably six, placed in equal angular intervals around the axis for the engagement of the driving element (70).
6. Roman shade, pleated curtain, Venetian blind, blind or another window decoration to be operated by means of drawing cords consisting of a curtain (90) and a certain number of drawing cords (91) which are fixed at the one end on the curtain and are guided to a winding roller,
   characterized in
   that the winding roller (100) is configured according to any of the claims 1 to 5.

Images