Classifications

• • A—HUMAN NECESSITIES
  • A45—HAND OR TRAVELLING ARTICLES
  • A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
  • A45B19/00—Special folding or telescoping of umbrellas
  • A45B19/04—Special folding or telescoping of umbrellas with telescopic sticks
• • A—HUMAN NECESSITIES
  • A45—HAND OR TRAVELLING ARTICLES
  • A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
  • A45B25/00—Details of umbrellas
  • A45B25/14—Devices for opening and for closing umbrellas
• • A—HUMAN NECESSITIES
  • A45—HAND OR TRAVELLING ARTICLES
  • A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
  • A45B25/00—Details of umbrellas
  • A45B25/14—Devices for opening and for closing umbrellas
  • A45B2025/146—Devices for opening and for closing umbrellas with a crank connected to a rope
• • A—HUMAN NECESSITIES
  • A45—HAND OR TRAVELLING ARTICLES
  • A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
  • A45B23/00—Other umbrellas
• • A—HUMAN NECESSITIES
  • A45—HAND OR TRAVELLING ARTICLES
  • A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
  • A45B7/00—Other sticks, e.g. of cranked shape
  • A45B7/005—Other sticks, e.g. of cranked shape crank-shaped
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S135/00—Tent, canopy, umbrella, or cane
  • Y10S135/912—Wheeled framework

Definitions

• the invention relates to a Freiarmle according to the preamble of claim 1.
• the object of the invention is to make the adjustment steps of a Freiarmneses of the type mentioned smoothly.
• the object of the invention is achieved by a Freiarmtruck 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 particularly suitable for a screen according to WO 98/08411 A. 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 conic shape (ellipse segment, hyperbola segment or parabola segment) or a synthetic form of juxtaposed pieces with a varying radius of curvature.
• rollers as guide members are set forth in claim 2, since then the rollers - when they are loaded transversely to the axis of the roller - preventing that the front sides of the rollers to the base surfaces of the groove-like guideway braking stand and damage them, because they have a corresponding distance from the base.
• the guide member can be formed to the brake pad.
• the embodiment of the Freiarmles 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 interpretor deviate from their 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).
• 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).
• the use of at least one wedge which is designed and arranged so that it simultaneously via a gearing acinaver- locking with the mast head on the one hand and on wedge surfaces a frictional connection between the mast head and boom on the other.
• 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).
• the wedge wedge surfaces which cooperate with wedge surfaces of a brake shoe which frictionally abuts the boom (claim 13).
• Embodiment of the invention in the clamped state, in side view
• FIG. 2 shows a representation of the free-arm umbrella according to FIG. 1, in the folded-up state
• Figure 3 shows the boom bracket of Freiarmtranes according to Figure 1 in section III-III of Figure 1 and on a larger scale;
• FIG 4 is an exploded view of the boom bracket according to Figure 3;
• 5a shows an illustration of the rollers in the running position using the example of a preferred embodiment of the boom or mast profile
• Figure 5b is an illustration of the roles in running position on the example of an alternative embodiment
• Figure 6a is an illustration of the rollers in the braking position on the example of the preferred embodiment of the boom or mast profile;
• Figure 6b is a representation of the rollers in the braking position on the example of the alternative embodiment;
• Figure 7 is an illustration of an - inventive, but not claimed - embodiment with exploded view of the connecting portion of a telescopic with a mast lower part Mastobermaschines according to Figure 1;
• FIG. 8 shows a horizontal section through the height lock of FIG. 7.
• Figure 9 shows an alternative embodiment of the invention with two rollers, which are used via a balance beam to distribute the loads, in the direction of the roller axis and the stub axle;
• FIG. 10 shows the illustration in cross section transversely to the roller axes according to FIG. 9
• FIG. 1 shows a free-arm shield according to a preferred embodiment of the invention, shown spanned from the side and designated as a whole by 2.
• - B -
• the Freiarmwall 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.
• FIG. 1 the mast upper part 70 is in the extended position.
• FIG. 2 shows the screen of FIG. 1, wherein the roof construction 10 is closed and the boom 6 has retracted to such an extent in the boom bracket 8 until a stop 12 of the boom rests on the boom bracket 8.
• the boom holder 8 is also tilted about the tilting axis 14 in the closed position, so that the boom 6 is pivoted against the mast 4.
• the mast top is 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 and a right-hand guide track 20 of the boom 6 ( Figure 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. A roller spacing of 7 to 15%, preferably of about 10%, has proven useful. the extension length of the boom 6.
• 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 shown in FIG. 5a, or as braking or locking means, as in FIG Figure 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.
• 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 shown in FIG. 6a.
• the boom bracket 8 has a locking device 40 which includes a dual function on the one hand for detecting and releasing the tilt 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.
• the boom bracket 8 contains two mirror images formed wedges 42a, 42b, which are secured by means of a screw bolt 44 and a screw-on handle 46. clamped against each other and are solvable.
• the wedges 42a, 42b are arranged in the housing 16, which is arranged on a mast head 48, wherein the wedges 42, 42a for locking the tilted 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.
• 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.
• a toothing 54 in which a cam 56 of the wedge 42a, 42b enters a groove 58a at each wedge 42a, 42b in the clamped state or 58b in the mast head 48 engages.
• the handle 46 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.
• 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.
• the brake shoe 68 is pressed against the expeller 6 and holds it by traction, that is, frictional engagement, in the selected position. By screwing the frictional engagement is released and the boom 6 can be moved.
• 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.
• 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 8Oa 1 80b, 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.
• a handle 82 connected to the bolt, the roller 18 by means of the press flange 86 as shown in Figure 6a and 6b in the axial direction in the guide rail 20 are force-fitted such that the end face 38 of the roller 18 braking or blocking on the base 22 of Guideway 20 attacks.
• 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.
• at least one of the rollers 18 with its end face 38 as a clamping surface to a non-positive height lock and that at least one axis of the rollers 18 is formed as a clamping screw 81 with a press flange 86.

Landscapes

• Mutual Connection Of Rods And Tubes (AREA)
• Jib Cranes (AREA)
• Forklifts And Lifting Vehicles (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=38645665

Family Applications (1)

Country Status (8)

Families Citing this family (13)

Family Cites Families (19)

• 2008
  • 2008-06-03 CN CN2008800170062A patent/CN101677659B/zh active Active
  • 2008-06-03 EP EP08748376A patent/EP2152113B1/fr active Active
  • 2008-06-03 AT AT08748376T patent/ATE532429T1/de active
  • 2008-06-03 CA CA2681195A patent/CA2681195C/fr not_active Expired - Fee Related
  • 2008-06-03 ES ES08748376T patent/ES2375590T3/es active Active
  • 2008-06-03 WO PCT/CH2008/000246 patent/WO2008148233A1/fr not_active Ceased
  • 2008-06-03 AU AU2008258334A patent/AU2008258334B2/en not_active Ceased
  • 2008-06-03 US US12/450,590 patent/US7980261B2/en active Active

Non-Patent Citations (1)

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