SHADING DEVICE

Abstract

The invention relates to a shading device comprising a cloth that can be spread out in a cloth plane and is connected to a lead bar that is slidably guided in guides. The guides run horizontally or at a slight inclination to a horizontal. A blocking device has a displaceable stop part which can be displaced between a stop position, in which it can be brought into contact with the lead bar, and a release position. The blocking device is arranged below the cloth plane and below the lead bar and has a displace-ably mounted switching part which can be displaced by means of the lead bar, the switching movement of which switching part can be conveyed to the stop part by means of a transmission device in order to adjust said stop part between the stop position and the release position.

Claims

1. Shading device, comprising a cloth that can be spread out in a cloth plane and is connected to a lead bar, the lead bar being slidably guided in guides, the guides running horizontally or at an inclination of at most 30° to a horizontal, and comprising at least one blocking device that has a displaceable stop part which can be displaced between a stop position, in which it can be brought into contact with the lead bar, and a release position, characterized in that the blocking device is arranged below the cloth plane and below the lead bar and has a displaceably mounted switching part which can be displaced by means of the lead bar, the displacement movement of which switching part is conveyed to the stop part by means of a transmission device (20) in order to displace said stop part between the stop position and the release position.

2. Shading device according to claim 1, wherein the switching part can be brought into contact with a control part formed on the lead bar.

3. Shading device according to claim 2, wherein the control part is arranged on the underside of the lead bar.

4. Shading device according to claim 2, wherein the control part carries a control cam.

5. Shading device according to claim 2, wherein the control part is arranged at a distance from the axial end of the lead bar.

6. Shading device according to claim 1, wherein the switching part is arranged downstream of the stop part in an extension direction of the lead profile.

7. Shading device according to claim 1, wherein the stop part is mounted so as to be slidable and/or pivotable.

8. Shading device according to claim 1, wherein the switching part is mounted so as to be slidable and/or pivotable.

9. Shading device according to claim 1, wherein each guide has a blocking device.

10. Shading device according to claim 1, wherein each guide has a plurality of blocking devices arranged at an axial distance.

11. Shading device according to claim 1, wherein the stop part, the switching part, and the transmission device are mounted on a carrier part and can be removed from the guide together with said carrier part as a modular unit.

12. Shading device according to claim 11, wherein the carrier part can be selectively attached to different portions of the guide.

13. Shading device according to claim 1, wherein the switching part has a rotatably mounted roller which can be brought into contact with the control cam of the lead profile.

14. Shading device according to claim 1, wherein the transmission device has a gear mechanism and/or a lever and/or a toothed drive and/or a belt drive.

15. Shading device according to claim 14, wherein the transmission device comprises a push-push mechanism.

16. Shading device according to claim 1, wherein the switching part is prestressed by means of a spring.

17. Shading device according to claim 1, wherein the stop part can also be manually displaced between the stop position and the release position.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus, are not limitive of the present invention, and wherein:

[0031] FIG. 1 is a schematic view of a shading device according to the invention,

[0032] FIG. 2 is the section II-II from FIG. 1,

[0033] FIGS. 3a and 3b show the activation of the blocking device when extending the lead bar,

[0034] FIG. 4 shows a representation corresponding to FIG. 2, with the lead bar abutting the stop part,

[0035] FIGS. 5a and 5b show the individual phases of the deactivation of the blocking device,

[0036] FIG. 6 shows a view corresponding to FIG. 1 of a shading device according to a first modification,

[0037] FIG. 7 shows a view corresponding to FIG. 1 of a shading device according to a second modification,

[0038] FIG. 8 shows a view corresponding to FIG. 1 of a shading device according to a third modification, and

[0039] FIG. 9 shows the side view IX in FIG. 8.

DETAILED DESCRIPTION

[0040] A shading device 10 shown schematically in FIG. 1 has two guides 11 in the form of straight guide rails which run parallel to one another and are arranged at a mutual distance from one another, between which rails a lead bar 14 is arranged, which bar is guided in the guides 11 at its respective end portions and is displaceable along the guides 11, as indicated by the double arrow A.

[0041] At the rear end of the guides 11, which is the upper end according to FIG. 1, a cloth shaft housing 16 is arranged in which a cloth shaft 13 (shown only schematically) is accommodated. A cloth 12 can be wound up on the cloth shaft 13 and unwound from the cloth shaft 13. The front long side of the cloth 12, which is the lower long side according to FIG. 1, is connected to the lead bar 14.

[0042] The lead bar 14 can be moved along the guides 11 by means of a drive device (not shown), and in the process moved away from the cloth shaft 13. This is referred to as the extension movement. The extension movement of the lead bar 14 pulls the cloth 12 off the cloth shaft 13 and spreads it out between the cloth shaft 13 and the lead bar 14.

[0043] The cloth shaft 13 is assigned a cloth shaft motor (not shown) by means of which the cloth shaft 13 can be rotated so that the cloth 12 is wound up on the cloth shaft 13 and the lead bar 14 is retracted along the guides 11 toward the cloth shaft 13.

[0044] Near the outer end of the guides 11 that faces away from the cloth shaft housing 16, a blocking device 15, which is shown in particular in FIG. 2, is attached to said guides on their mutually facing inner sides. The blocking devices 15 are arranged below the cloth 12 and the lead bar 14 can move over them.

[0045] The blocking device 15 comprises a housing-like carrier part 19 which is releasably attached to the guide 11 and can be positioned on the guide 11 in various positions. A stop part 17 is arranged on the carrier part 19 and can be displaced between a stop position, in which it protrudes into the movement path of the lead bar 14, and a release position, as indicated by the double arrow B. In the release position, the lead bar 14 can move over the stop part 17 without coming into contact with it.

[0046] A displaceable switching part 18 is arranged on the carrier part 19 on the side of the stop part 17 that faces away from the cloth shaft 13. In the embodiment shown, the switching part 18 is designed as a linearly displaceable pin 23 which has a rotatably mounted roller 22 at its upper end, which upper end faces the movement path of the lead bar 14. The switching part 18 has a push-push mechanism, i.e. after the switching part 18 has been displaced by coming into contact with the lead profile 4 and a switching process has been triggered, the switching part 18 returns completely or at least approximately to its starting position, as indicated by the double arrow C.

[0047] A transmission device 20 (shown only schematically), for example in the form of a gear mechanism, is arranged inside the housing-like carrier part 19. A displacement movement of the switching part 18 is converted into a linear displacement movement of the stop part 17 by means of the transmission device 20.

[0048] The lead bar 14 has a control part 24 on its underside, which part carries a control cam 21.

[0049] The activation of the blocking device 15 is explained below with reference to FIGS. 2, 3a, and 3b. The lead bar 14 is extended along the guides 11 by means of a drive device (not shown), as indicated by the arrow R in FIG. 2. The cloth 12 is pulled off the cloth shaft 13 and spread out. As the lead bar 14 moves further, it comes into the region of the blocking device 15. Since the stop part 17 is in its retracted release position, the lead bar 14 can move over the stop part 17 without coming into contact with it. This state is shown in FIG. 3a.

[0050] During the further extension movement of the lead bar 14, the control part 24 thereof comes into contact with the roller 22 of the switching part 18 and pushes the switching part 18 downwards. The movement of the switching part 18 is conveyed to the stop part 17 via the transmission device 20, so that the stop part 17 is displaced into its stop position, as indicated by the arrow D in FIG. 3b. In the stop position, the stop part 17 protrudes into the travel path of the lead bar 14.

[0051] The direction of movement of the lead bar 14 is then reversed, as indicated by the arrow S in FIG. 3b. The lead bar 14 abuts the stop part 17 so that further movement of the lead bar 14 in the direction of the cloth shaft 13 is prevented. By activating the cloth shaft 13, the cloth 12 is now tensioned and can be kept under this tension. This state is shown in FIG. 4.

[0052] By reversing the direction of movement of the lead bar 14, the control part 24 thereof is released from the switching part 18 of the blocking device 15, so that the switching part 18 returns to its starting position as a result of a spring (not shown).

[0053] FIG. 4 shows the lead bar 14 in contact with the stop part 17 of the blocking device 15, the cloth 12 being held under tension. In order to retract the shading device from this position, i.e. to wind the cloth 12 back onto the cloth shaft 13, the blocking device 15 must be deactivated. For this purpose, the lead bar 14 is first moved in the extension direction, i.e. moved away from the cloth shaft 13 and the stop part 17, as indicated by the arrow R in FIG. 5a. The lead bar 14 is displaced in this was until the control part 24 thereof comes into contact with the switching part 18 and displaces it, as a result of which the stop part 17 is displaced from its stop position into the release position, as indicated by the arrow E in FIG. 5a. Since the stop part 17 no longer impedes the movement of the lead bar 14, the lead bar 14 can be retracted in the direction of the cloth shaft 13 (arrow S), passing the stop part 17 without coming into contact with it, as is shown in FIG. 5b.

[0054] FIG. 6 shows an alternative embodiment to the shading device according to FIG. 1. According to FIG. 1, the shading device 10 has two rail-like guides 11 which guide opposite end portions of the lead bar 14 so that the cloth 12 extends between the guides 11. The embodiment according to FIG. 6 differs from this in that the guides 11 are now also arranged underneath the cloth 12, so that the cloth 12 also covers the tops of the guides when said cloth is pulled out. Alternatively, the cloth 12 can also be arranged below the guides 11.

[0055] In the embodiment according to FIG. 7, a third rail-like guide 11 is provided, with all guides being at a distance from and running parallel to one another.

[0056] In the previous embodiments of the shading device 10, each guide 11 was assigned exactly one blocking device 15. FIGS. 8 and 9 show a further embodiment in which each guide 11 is assigned two blocking devices 15.1 and 15.2, which blocking devices are attached to the respective guides 11 at an axial distance. The blocking devices 15.1 and 15.2 are each structurally and/or functionally identical and have the structure mentioned above. When the lead bar 14 is extended (arrow R in FIG. 9), it runs onto the first blocking device 15.1, as a result of which the stop part 17 is brought from the release position into the contact position in the aforementioned manner. If the user wants to tension the cloth in this position, he can retract the lead bar 14 again in the aforementioned manner and bring it into contact with the stop part 17.

[0057] Alternatively, it is also possible for the user to extend the lead bar 14 further until it runs onto the second blocking device 15.2 and brings the stop part 17 thereof into the stop position in the aforementioned manner. When the lead bar 14 is subsequently retracted, said lead bar then abuts the stop part 17.

[0058] In order to deactivate the blocking device 15.1 or 15.2, the lead bar 14 is first moved in the extension direction in the aforementioned manner, so that the stop part 17 of the second bocking device 15.2 returns to its release position so that the lead bar 14 can be retracted. If the lead bar 14 then moves onto the first blocking device 15.1, the switching part 18 thereof is actuated, whereby the stop part 17 of the first blocking device 15.1 reaches the release position, so that the lead bar 14 can be further retracted.

[0059] The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are to be included within the scope of the following claims.