EP2152113B1 - Free-arm canopy - Google Patents

Abstract

The invention originates with a mast on the upper end of which a locking and tiltable jib support is arranged. A jib is guided in the jib support such that said jib can be slid and fastened and carries a roof construction on the outer end thereof, wherein said roof construction can be extended like a canopy, fan, or frame. To make the extension and retraction of the jib easier, it is proposed that the jib support be designed with at least four guide and locking rollers, of which at least two engage in a left-handed track and two in a right-handed track of the jib.

Description

Technical area

The invention relates to a Freiarmschirm according to the preamble of claim 1.

State of the art

A Freiarmschirm of the type mentioned is from the WO 98/08411 A1 known. Moving, ie extension and retraction of a boom on a boom support arranged at the upper end of the mast poses difficulties, since the boom canted and jammed with increasing extension length on the boom bracket, so that the boom can be moved practically only by lifting. These problems are exacerbated by the fact that the screen is connected by means of a ball joint on the boom, whereby a further adjustment and adjustment of the screen is possible. However, this increases the risk of lateral tilting of the boom during displacement. Incidentally, similar problems also arise when height adjustment of a telescopic mast of such a free-arm umbrella. DE 29906116 U also discloses a free-arm umbrella with a mast.

There are various designs of Freiarmschirmen known that can be adapted to the wandering position of the sun. From the WO 2005/018369 A1 is known a free-arm screen, wherein the boom is connected to the mast with a height-adjustable slide. A support strut connects the upper mast end to the middle portion of the cantilever. A disadvantage is that the support strut defines a guide curve and the boom thus can not be set independently of a guide post arbitrarily in the horizontal direction. This design is not height adjustable, weight intensive and bulky in shipping.

Experiments have shown that the guidance of the boom by means of rollers does not solve the problem a priori. If the rollers are placed below and above the boom, the extension movement begins to stutter with increasing export length. In order to allow a soft complete extension, it is also necessary in this design to raise the screen part slightly and pull the boom from the screen part forward or push back again. Additional problems arise when the boom is designed as a bow, as this training favors the lateral tilting and clamping. In addition, the boom of the shield side is usually difficult to access because of the protection of the umbrella set up furniture.

Presentation of the invention

The object of the invention is to make the adjustment steps of a Freiarmschirmes of the type mentioned smoothly.

The object of the invention is achieved by a Freiarmschirm according to claim 1. The measures of the invention have the consequence that the boom of the screen - after loosening a lock - can move smoothly over its entire length and without lateral tilting, that is, the boom without additional supports off and can be retracted. These measures are in particular for a screen after WO 98/08411 1 A suitable. In this case, the boom does not have to be straight, but the advantages arise in particular when the boom is formed with its guideways in the form of a bow. This arc need not be circular segment-shaped, but may also correspond to the section of another conical shape (ellipse segment, hyperbola segment or parabola segment) or a synthetic form of juxtaposed pieces with a varying radius of curvature.

Advantageous embodiments are specified in claims 2 to 13.

A particularly advantageous embodiment with rollers as holding and guiding members is set forth in claim 2, since then the roles - when they are loaded transversely to the axis of the roller - prevent that the front sides of the rollers to the base surfaces of the groove-like guideway braking and pending damage, as they have a corresponding distance from the base.

With appropriate coordination of the forms of holding and guiding member and guide track, the guide member can be formed to the brake pad.

Advantageously, the embodiment of the Freiarmschirms when the central axis of the guideways coincide approximately with the center axis of the mast and / or the boom together, at least not more than 15%, preferably not more than 10% of the thickness of the corresponding profile of the mast and / or of the cantilever deviate from its central axis (claim 4).

The solution according to the invention is of particular advantage in the design of the free-arm umbrella according to claim 5, according to which the boom support is formed with at least four rollers, two of which engage in a left and a right-hand guideway of the cantilever. It is advantageous in terms of stability and load distribution, if the axial distance between the front and rear rollers 7 to 15%, preferably about 10% of the extension length of the boom measures (claim 6).

To accommodate larger loads, it may be advantageous to use double roles with a wippfähigen balance beam (claim 7).

The boom may be rectilinear or arcuate according to claim 8.

It is an advantageous embodiment, when the boom bracket is tiltably arranged on the mast and at least one locking device for detecting and releasing the extended position of the boom and its tilting position, individually or in combination (claim 9).

Advantageously, the use of at least one wedge, which is designed and arranged so that it simultaneously via a toothing a safety latching with the mast head on the one hand and on wedge surfaces a frictional connection between the mast head and boom on the other hand causes. (Claim 10). Preferably, the locking device has two opposite, mutually braced wedges on (claim 11). The teeth of the wedge may have cams or grooves which engage in the locking operation in corresponding grooves or cams on the mast head and cause a positive locking (claim 12). For non-positive determination of the boom, the wedge wedge surfaces, which cooperate with wedge surfaces of a brake shoe which frictionally abuts the boom (claim 13).

The above-mentioned as well as the claimed and described in the following embodiments, according to the invention to be used elements are subject to their size, shape design, material usage and their technical conception no special conditions of exception, so that the well-known in the respective field of application selection criteria can apply without restriction.

Brief description of the drawings

Figur 1

eine Darstellung eines Freiarmschirms gemäss einem bevorzugten Ausführungsbeispiel der Erfindung, in aufgespanntem Zustand, in Seitenansicht

Figur 2

eine Darstellung des Freiarmschirms gemäss Figur 1, in zusammengeklapptem Zustand;

Figur 3

die Auslegerhalterung des Freiarmschirmes gemäss Figur 1 im Schnitt III-III der Figur 1 und in grösserem Massstab;

Figur 4

eine Explosionszeichnung der Auslegerhalterung gemäss Figur 3;

Figur 5a

eine Darstellung der Rollen in Laufstellung am Beispiel einer bevorzugten Ausführungsform des Ausleger- oder Mastprofils;

Figur 5b

eine Darstellung der Rollen in Laufstellung am Beispiel einer alternativen Ausführungsform;

Figur 6a

eine Darstellung der Rollen in Bremsstellung am Beispiel der bevorzugten Ausführungsform des Ausleger- oder Mastprofils;

Figur 6b

eine Darstellung der Rollen in Bremsstellung am Beispiel der alternativen Ausführungsform;

Figur 7

eine Darstellung einer - erfinderischen, aber nicht beanspruchten - Ausführungsform mit Explosionszeichnung des Verbindungsbereiches eines mit einem Mastunterteil teleskopierbaren Mastoberteiles gemäss Figur 1;

Figur 8

einen horizontalen Schnitt durch die Höhenarretierung der Figur 7.

Figur 9

die Darstellung einer Alternative der Ausführung der Erfindung mit zwei Rollen, die über einen Waagbalken eingesetzt sind, um die Lasten zu verteilen, in Sichtrichtung der Rollenachse und die Stutzachse; und

Figur 10

die Darstellung im Querschnitt quer zu den Rollenachsen gemäss Figur 9.

Further details, advantages and features of the subject matter of the present invention will become apparent from the following description of the accompanying drawings, in which - for example - free-arm umbrellas according to the invention are explained. In the drawings shows:

FIG. 1

an illustration of a Freiarmschirms according to a preferred embodiment of the invention, in the clamped state, in side view

FIG. 2

a representation of Freiarmschirms according FIG. 1 in folded state;

FIG. 3

the boom bracket of Freiarmschirmes according FIG. 1 in section III-III of FIG. 1 and on a larger scale;

FIG. 4

an exploded view of the boom bracket according to FIG. 3 ;

FIG. 5a

an illustration of the roles in running position the example of a preferred embodiment of the boom or mast profile;

FIG. 5b

a representation of the roles in running position using the example of an alternative embodiment;

FIG. 6a

an illustration of the roles in braking position on the example of the preferred embodiment of the boom or mast profile;

FIG. 6b

an illustration of the roles in braking position on the example of the alternative embodiment;

FIG. 7

an illustration of an - inventive, but not claimed - embodiment with exploded view of the connecting portion of a telescopic with a mast lower part mast upper part according FIG. 1 ;

FIG. 8

a horizontal section through the height lock the FIG. 7 ,

FIG. 9

the representation of an alternative embodiment of the invention with two rollers which are inserted via a balance beam to distribute the loads, in the direction of the roller axis and the support axis; and

FIG. 10

the representation in cross section transverse to the roller axes according FIG. 9 ,

Ways to carry out the invention

In FIG. 1 is a Freiarmschirm according to a preferred embodiment of the invention shown spanned from the side and designated as a whole with 2. The Freiarmschirm consists essentially of a mast 4 and a boom 6, the extension on the mast 4 and retractable, that is arranged in its longitudinal direction displaceable in the boom bracket 8, and carries a roof construction 10 of conventional construction. The roof construction is clamped in the manner of a screen, fan or clamping frame or in a similar manner. In FIG. 1 is the mast top 70 in the extended position. The FIG. 2 shows the screen of FIG. 1 , wherein the roof construction 10 is closed and the boom 6 is retracted so far in the boom bracket 8 until a stop 12 of the boom is applied to the boom bracket 8. The boom bracket 8 is also tilted about the tilting axis 14 in the closed position, so that the boom 6 is pivoted against the mast 4. In FIG. 2 is the mast top in lowered position.

The boom bracket 8 has a housing 16 of two housing halves 16a, 16b, in each of which two rollers 18 are arranged, which engage in a left-hand and a right-hand guide track 20 of the boom 6 ( FIG. 3 ). The guideways 20 are formed like a groove and have base surfaces 22 and side surfaces 24, with which the running surfaces 26 of the rollers 18 cooperate. The boom 6 and the guideways 20 may be rectilinear or curved as in the present example.

The central axis 28 of the guideways 20 should not deviate more than 15%, preferably not more than 10%, of the thickness of the cantilever 6 from its central axis 30. The lateral arrangement of the rollers 18 at the height of the central axis 30 of the boom 6 brings the desired ease. Depending on the length of the extension distance creates considerable pressure on the rollers 18. In order to avoid overloading of rollers 18 and treads, enough roll spacing is set up in the direction. Has proved a role distance of 7 to 15%, preferably of about 10% .der the extension length of the boom. 6

In the preferred embodiment, the rollers 18 - as in the FIGS. 5a and 6a shown - lateral guide contours 32, respectively, the treads 26 of the rollers 18 limit. The rollers 18 with the guide contours 32 cooperate with edge contours 34 of the guideways 20. The dimensions of the rollers 18 and the guideways 20 are designed such that, depending on the direction of force, the rollers 18 can act only as running and guiding rollers, as in FIG FIG. 5a shown, or as a braking or locking means, as in FIG. 6a shown. The rollers 18 function as pure running and guiding rollers according to FIG. 5a when they are predominantly loaded transversely to their axis 37. Then prevent the guide contours 32, which cooperate with the edge contours 34 of the guideways 20, a deeper penetration of the rollers 18 in the groove-like guideways 20. This also prevents end faces 38 of the rollers 18 come into contact with the base surfaces 22 of the guideways 20, braking act and damage them. However, if the rollers 18 are loaded in their axial direction, then the rollers 18 travel along their guide contours 32 over the edge contours 34 of the guideways 20 and thus lift off with their running surfaces 26 from the side surfaces 24 of the guideways 20 and can continue with their end faces 38 against the base surfaces 22 of the guideways are pressed and thereby cause a braking or blocking frictional engagement, as is apparent from Figure 6a.

An alternative - but basically equivalent - embodiment of the rollers and the guide contours is in the FIGS. 5b and 6b shown.

The boom bracket 8 has a locking device 40 which includes a dual function on the one hand for detecting and releasing the tilting position of the boom bracket 8 about the tilting axis 14 with respect to the mast 4 and on the other hand to secure the extended position of the boom 6. For this purpose, the boom bracket 8 contains two mirror images trained wedges 42a, 42b, by means of a bolt 44 and a screw-on handle 46 against each other be braced and detachable. The wedges 42a, 42b are disposed in the housing 16, which is arranged on a mast head 48, wherein the wedges 42, 42a for locking the tilting position between the mast head 48 and the housing 16 and for securing the position of the boom 6 between the mast head 48 and the boom 6 cooperate as follows.

For general limitation of the tilt angle of the boom bracket 8, the mast head 48 stops 50a, 50b, which limit the pivoting of corresponding stops 52a, 52b in the housing 16 of the boom bracket 8. For fixing the tilting position with extended boom ( FIG. 1 ) and with retracted boom ( FIG. 2 ) has a toothing 54, in the clamped state at each wedge 42a, 42b a cam 56 of the wedge 42a, 42b engages in a groove 58a or 58b in the mast head 48. In order to enable a change of the tilting positions, the handle 46 must be screwed so far that the cams 56 come out of the grooves 58a or 58b and can pass over the intermediate web 60 on the mast head 48 to engage in the adjacent groove for the other tilting can , By screwing the handle fixation is restored.

To fix the extended position of the boom 6, the wedges 42a, 42b each wedge surfaces 62a, 62b, on the one hand with keel surfaces 64a, 64b on the mast head 48 and on the other hand further wedge surfaces 66a, 66b, which cooperate with wedge surfaces 76a, 76b on a brake shoe 68, which is present on the boom 6. By screwing the handle 46, the brake shoe 68 is pressed against the boom 6 and holds it by adhesion, that is, frictional engagement, fixed in the selected position. By screwing the frictional engagement is released and the boom 6 can be moved. Since the frictional engagement requires a smaller solution of the handle 46 than the release of the toothing 54 of the tilting position, releasing the locking of the arm 6 does not automatically mean that the tilting position is released.

In the present embodiment, the mast 4 is formed in two parts, wherein a mast upper part 70 is telescopically arranged in a mast base 72, and fixable by means of a fixing device 74 in desired height positions. In this case, the mast upper part 70 has two-sided guideways 20, in which rollers 18 engage. The profile of the mast top 70 is identical to that of the boom 6.

The rollers 18 are arranged in a housing 80, which is formed from two housing parts 80 a, 80 b, which is connected to the mast lower part 72. The fixing device 74 is formed by a roller 18, which is mounted on a threaded bolt 81 with a thread 84 and with a press flange 86. By means of a handle 82 connected to the bolt, the roller 18 by means of the press flange 86 as in FIG. 6a or 6b shown in the axial direction in the guide track 20 are force-fitted such that the end face 38 of the roller 18 braking or blocking on the base 22 of the guideway 20 attacks.

In the FIGS. 9 and 10 an alternative embodiment of the guide members is shown in which they are not formed as individual roles, but as pairs of rollers 18 whose axes 37 are connected to a balance beam 35. The balance beam 35 is inserted with a support shaft 36 in the housing. This - somewhat more elaborate - execution has the advantage that the loads can be better distributed.

If the invention is to be applied to the mast of a Freiarmschirmes, the mast 4 is at least two parts with a mast top 70 and a mast base 72 formed and fixed in different height positions, the mast top 70 has the guideways and the guide members, preferably the rollers 18 with the mast lower part 72 are connected. The mast profile of the mast top 70 may be identical to that of the cantilever 6 as described above. Optionally, it is provided that at least one of the rollers 18 with its end face 38 as a clamping surface to a non-positive height locking and that at least one axis of the rollers 18 is formed as a clamping screw 81 with a press flange 86. This is in particular on the FIGS. 7 and 8th directed.

LIST OF REFERENCE NUMBERS

2

cantilever parasol

4

mast

6

boom

8th

arm mounting

10

roof construction

12

attack

14

tilt axis

16

casing

16a

housing halves

16b

housing halves

18

role

20

guideway

22

Floor space

24

faces

26

Role tread

28

Central axis of 20

30

Central axis of 6

32

Guide contour of the rollers

34

Edge contours of the guideways

35

balance beam

36

Sützachse

37

Axis of 18

38

Front side of the rollers

40

locking device

42a

wedges

42b

wedges

44

bolts

46

Handle for 40

48

masthead

50a

Stop 48

50b

Stop 48

52a

Stop 16

52b

Stop 16

54

gearing

56

cam

58a, b

groove

60

gutter

62a

Wedge surface 42a

62b

Wedge surface 42b

64a

Wedge surface 48

64b

Wedge surface 48

66a

Wedge surface 42a

66b

Wedge surface 42a

67a

Wedge surface 68

67b

Wedge surface 68

68

brake shoe

68

Mast shell

72

Mast base

74

fixing

80

casing

80a

Genäuseteil

80b

housing part

81

bolts

82

Handle for 74

84

thread

86

press flange

Claims (13)

1. A cantilever parasol (2) having a mast (4), at the upper end whereof is arranged an arm mounting (8) comprising holding and guide members in which arm mounting an arm (6) is guided displaceably and fixably, the arm carrying at its outer end an openable canopy structure (10), characterized in that the arm has, on mutually remote sides, groove-like guide tracks (20) which extend in the longitudinal direction and in which said holding and guide members engage, wherein the holding and guide members have lateral guide contours (32) which cooperate with the contours (34) of the guide tracks (20).
2. The cantilever parasol as claimed in claim 1, characterized in that the guide members take the form of rollers (18).
3. The cantilever parasol as claimed in claim 2, characterized in that the diameter of the roller (18) and the guide contour (32) thereof are matched to the groove-like guide track (20) with edge contour (34) such that, when the roller (18) is put under load transversely with respect to its axis (37), the end face (38) of the roller (18) is held at a distance from the base face (22) of the guide track (20).
4. The cantilever parasol as claimed in one of claims 1 to 3, characterized in that the center axis (28) of the guide track (20) deviates from the center axis (30) of the arm (6) by no more than 15%, preferably no more than 10%, of the thickness of the respective profile of the mast and/or the arm.
5. The cantilever parasol as claimed in one of the preceding claims, characterized in that the arm mounting (8) is constructed to have at least four rollers (18), of which respectively two engage in a left-hand guide track (20) of the arm (6) and two in a right-hand one.
6. The cantilever parasol as claimed in claim 5, characterized in that the spacing between the axes of the front and rear rollers (18) is 7 to 15%, preferably approximately 10%, of the length of extension of the arm (6).
7. The cantilever parasol as claimed in claim 1, characterized in that the holding and guide members take the form of a roller arrangement each having at least two rollers (18), wherein the two rollers (18) are connected by means of a connection element taking the form of a horizontal tie bar (35), wherein the horizontal tie bar has a support pin (36) connected to the housing.
8. The cantilever parasol as claimed in one of the preceding claims, characterized in that the arm (6) is arcuate in form.
9. The cantilever parasol as claimed in one of the preceding claims, characterized in that the arm mounting (8) is tiltable and has at least one lacing device (40) for fixing and releasing the extension position of the arm (6) and its tilt position, individually or in combination.
10. The cantilever parasol as claimed in one of the preceding claims, characterized in that the mast (4) has a mast head (48) on which there is arranged the arm mounting (8), which has at least one wedge (42a 42b) which is constructed and arranged such that, simultaneously, it provides a safety latching to the mast head (48) by way of a toothed element (54), on the one hand, and a force-fitting connection between the mast head (48) and the arm (6) by way of wedge surfaces (62a, 62b), on the other.
11. The cantilever parasol as claimed in claim 10, characterized in that the locking device (40) has two wedges (42a, 42b) which may be clamped to one another.
12. The cantilever parasol as claimed in claim 10, characterized in that the toothed element (54) of the wedge (42a, 42b) has notches (56) or grooves (58a, 58b) which, during the locking procedure, engage in corresponding grooves (58a, 58b) or notches (56) on the mast head (48) and provide a form-fitting locking.
13. The cantilever parasol as claimed in claim 10 or 11, characterized in that the wedge surfaces (66a, 66b) of the wedge (42a, 42b) cooperate with wedge surfaces (67a, 67b) on a brake block (68) which in the fixed condition abuts with frictional fit against the arm (6).

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