FR2577122A1 - SHORTENABLE UMBRELLA - Google Patents

Abstract

The present invention relates to a shortenable umbrella. Umbrella characterized in that in the open position of the covering, the articulation 14 connecting the inner branch 7 to the control spacer 11 rests on the lower edge 8e of the support spacer 8, at a point as close as possible of the neutral line or of the diagonal D of the articulated quadrilateral P, or takes relatively to this edge a position closely neighboring, so that the articulated quadrilateral P appears as a flat triangular structure T presenting an obtuse exterior angle alpha and whose the articulation 12 connecting the support spacer 8 to the short arm 10a of the peripheral branch 10 is placed at approximately the same distance from the neutral line or from the diagonal D, from above, as the articulation connecting the inner branch 7 to the control spacer 11, from below. (CF DRAWING IN BOPI)

Description

The invention relates to a shortening umbrella comprising a handle and

  a crown attached to it, to which are hinged

  interior branches which each apply by means of an articu-

  scissors to a support spacer and are connected by

  intermediate of a scissor arm extending beyond the scissors joint, a control spacer, the support spacer being hinged at one end to a movable slider on the handle and at the other end to an arm short of a peripheral branch, so that the support spacer, by its portion extending from the scissor joint to the short arm of the peripheral branch,

  forms the long upper link parallel to the spacer

  Mande located below, the latter, by its outer end, being articulated, below the joint connecting the support spacer and the short arm of the peripheral branch, the arm, so that it and the scissors arms of the inner branch form the short links and that the control spacer and the part of the supporting spacer located above it, form the

  long links of an articulated quadrilateral.

  US Pat. Nos. 177,339 and 1,189,119 already have known umbrellas of this construction which are distinguished, for example, from the widely adopted construction with parallelogram kinematics.

  according to patent BE 423 344 or US Pat. No. 3,467,115, by a cinematic

  than folding with parallelogram, powered by scissors, branches

  arranged in the peripheral region. Umbrellas, according to the first

  documents, can be shortened into small volume objects

  and be maneuvered in one operation, with complete folding of the cover

  which occurs at the same time as the actuation of the slider.

  Despite their construction in itself very stable, we can not avoid,

  in case of strong gusts of wind, a reversal of the coating with

  xity turned upwards. As a result of the excessive effort that results from

  in particular the tensile and compressive stress

  This leads to deformities or complete destruction of branches or joints. according to

  US Pat. No. 177,339, to avoid the destructive reversal of the coating

  There are also wires whose function is to hold open branches on the handle. However, in fact, this measure does not prevent the overturning of the coating and, in addition, the traction son used to maintain the branches are troublesome when wearing the umbrella open. That is why, so far, the manufacture of this umbrella structure, which does not appear to be applicable in practice,

could not get established.

  The aim of the invention is to provide an umbrella of the structure defined at the beginning which supports well the reversal of the open covering by gales, without deformation or destruction of the branches and their joints, the preventive measure not having to require

  additional expense and the returned coating being designed to

  can easily be brought back to the normal position by means of the slide

bucket.

  This problem is solved, according to the invention, by the fact that in the open position of the coating, the joint connecting the inner branch to the control spacer rests on the lower edge of the support spacer at a point as close as possible to the neutral line or diagonal D of the articulated quadrilateral F, or takes a relatively closely

  so that the articulated quadrilateral appears as a triangular structure

  flat plate having an obtuse outside angle and whose articulation connecting the support strut to the short arm of the peripheral branch is placed approximately at the same distance from the neutral or diagonal line, from above, the joint connecting the inner branch to the control spacer, from below. In this way, we obtain an umbrella having a link parallelogram kinematics moved by a scissor lever drive, of the structure defined at the beginning, which resists even to great wind forces and which, if the coating turns all of even up

  due to excessive pressure due to gales, do not deform

  not me and not destroyed. This results from the fact that when

  is open, the parallelogram joint of the scissors arm of the inner branch rests on the support spacer or is placed close to it, just below the point line

  death or the diagonal of the parallelogram, and also that the article

  between the short arm of the peripheral branch and the support spacer is disposed about as close to this neutral or diagonal line. This results in an open form of cladding fork whose scissor lever arms and link parallelogram appear as a flat triangular structure which supports each other with stabilization, in block position, the parts being placed to a large extent the against each other or one in the other. If there is still a reversal of the coating due to too much wind pressure, the rods

  the parallelogram or the scissor lever that is

  Each time, they are placed completely against each other or in each other in a block position, just in front of the neutral or diagonal line, at the same time as a short deflection occurs (among other things , the deformation of the parts by bending and the play of the hinge bearings) on the side of the external links of parallelogram which have not yet completely stumbled,

  on the control spacer with formation of a second fixed stop.

  As a result of these two fixed stops, a block position occurs.

  total and a strong self-stabilization of the central region of the

  It is exposed to deformation or breakage, so that significant tensile forces are transmitted to the outer region of the coating, which is less exposed and more flexible. The remainder of the bending of the outer side of the parallelogram links, for the formation of the second abutment and the completed support block position,

  gently done by a few degrees of

  the short arm of the peripheral branch. The rest of the race

  compression mechanism of the fork mechanism in the central region of the

  During the turning up of the convexity upwards, it is kept as small as possible. Since the block position takes place before the mentioned neutral line, it avoids at the same time

  lateral shifting and shearing of the parallel rods

  logram and therefore, ultimately, a distortion or a des-

  truction of branches or their joints. As a result of the structure

  and the aforesaid arrangement of the coating kinematics, it can be reduced from the convexity turned down to the normal convexity of coating, by simply pulling the slide down on the handle, particularly as a result of the stops and supports

  above mentioned neutralization stabilization, also without excessive

  sive or without deformation or rupture. The slide race that

  the slide is relatively short, since the opening

  simultaneous scissors by the inner branch and the spacer

  support already triggers after a relatively short time

  so much to overcome the tension, the necessary point of tilting back of the peripheral branches, via articulated polygon blocked and picked up. Moreover, to realize the invention, no additional technical means are needed in relation to the fundamental designs that can be drawn from the old prototypes.

mentioned at the beginning.

  An arrangement of the invention is obtained which resists particularly well the efforts and has a particularly safe operation if one of the short links of the articulated quadrilateral, forming the

  scissors arm, is formed of a fork supporting and guiding the

  scissors, the support spacer and its connecting joint and if the other short link of the articulated quadrilateral formed

  by the short arm of the peripheral branch, guided by an extremity, -

  by means of another fork, the upper long link of the four-

  articulated side, so that it can rotate on the articulation and is guided by the other end so as to be rotatable, in its connection with the lower long link of the articulated quadrilateral or the control spacer, on the articulation by another fork of the outer end of the control spacer, and if the latter, by its upper edge or by its profiled bottom or by depressions, forms a pivoting abutment situated in front of the neutral line,

  for the short arm of the peripheral branch.

  According to another advantageous development of the invention, the para-

  rain can bend in a particularly compact way, thanks to the fact that the inner branch has a U-shaped profile open towards the outside and towards the lining and housing the support spacer

  when the umbrella is shortened and if the support spacer and the

  control trestle are formed of hollow U-shaped sections arranged in

opposite directions.

  It is possible to obtain another embodiment of the invention, advantageously

  for operation, if the scissors joint

  inner cheek and the support spacer is arranged eccentrically thereon and if the latter is provided at its connected end

  the short arm of the peripheral branch, with an elbow turned towards the

order tretoise.

  Another advantageous embodiment is obtained for the function

  if the inner branch, starting from the crown, presents

  in the direction of his scissors arm a profile that is constantly thickening

  is lying. It is possible to obtain an articulated connection of the scissors drive

  particularly resistant to efforts, according to another mode of

  tion, if the inner branch is applied by a bearing flange of

  the scissors joint against a leg fork disposed on the

  support trestle and if it is flanked by the fork.

  Here we can obtain a simplification of manufacture if, according to another proposal of the invention, the fork is formed of

two sides of flank.

  The invention is explained more precisely below with reference to the exemplary embodiment represented by the drawings in which: FIG. 1 shows the umbrella according to the invention in the folded state;

  FIG. 2 is an enlarged partial view of the articula-

  scissors of branches; Figure 3 shows one half of the umbrella in the deployed state; Figure 4 shows the umbrella in a similar view but with a coating turned parabolically upwards by a gust of wind; Fig. 5 is an enlarged partial view of the region of the outer short link of the articulated branch quadrilateral, seen from above; Fig. 6 shows the same outer region of the quadrilateral articulated in enlarged side elevation; Figure 7 shows half of the umbrella in the intermediate phase

  between the upward state and the state of relaxation, turned again

  calf down, and Figure 8 shows an enlarged portion of another variant

  of the scissor joint region.

  The umbrella has a handle 1 which is preferably formed

  several parts that can telescope into one another. At the ex-

  lower end of the handle 1 is fixed a handle not shown and at the upper end of the handle 1, a ring 2. On the handle 1 can come and go a slide 3 which can be blocked, at least in the highest position that FIGS. 3 and 4 show, when the coating is open, by means of a stop 5 provided with a mouth

  4. By means of the slider 3, it is possible to slide open

  crown 2, the coating, only half

  for clarity and close it in the opposite direction.

  The coating is formed of a number of articulated forks

  star to the crown 2 and the slider 3 so as to be pivotable

  ter, and a coating 6 carried by them. The forks, only one of which is shown, each have an inner branch 7 articulated to the crown 2 and a support spacer 8 hinged to the slider 3. The latter and the inner branch 7 are interconnected crosswise, so as to be able to turn, by a scissor joint 9 and therefore form a scissor lever mechanism that can

  folded and deployed (FIGS. 3 and 4) by means of the slider 3 (FIG.

  re 1). The inner branch 7 and the support spacer 8 are formed of U-shaped sections whose open gutters are turned towards the coating 6. The scissor joint 9 is in a fork 7a of the inner branch 7, obtained by cutting the The fork 7a extends over the entire length of the short scissor arm 7b of the inner branch 7 and is substantially identical to the

  this arm 7b, while the part of the support spacer 8 which de-

  passes the scissor joint 9 forms a long shear arm 8a.

  The support spacer 8 is mounted in the fork 7a on a tab formed on the side of its upper edge 8b, thus eccentrically and ends, at the end of its shear arm 8a, by an elbow.

8d turned down.

  If the scissor arm 7b of the inner branch 7 is designed

  in the form of an elbow and if the U-shaped profile of this branch has a

  wider than the profile of the support spacer 8, it is possible to

  pivotally inserting its scissor arm 8a into the inner limb

  7, in the folded position of the umbrella according to FIG.

  apply the other parts of the fork against the

  7. Correspondingly, a narrow section close fold of the folded umbrella can be obtained. In addition, the inner branch 7

  can, as shown, be conceived in such a way that the souls

  lateral tudals 7c of its profile, starting from the crown 3,

  become ever wider or wider conic-

  in the direction of the scissors arm 7b. As a result, the

  7 has an unequal moment of inertia along its length, so that its moment of resistance to exertion has a corresponding speed or that the stress it undergoes remains equal in accordance with the section

uneven.

  The mechanism of scissor levers described above operates, for each fork, a link parallelogram or articulated quadrilateral P which, in turn, causes a peripheral branch 10 to

  fold against the articulated quadrilateral P according to Figure 1 or to

  housing of the articulated quadrilateral P to move to the open position of the coating according to Figures 3 and 4. The peripheral branch 10, preferably formed of flexible metal wire in all directions, forms, in combination with the coating 6 placed on it, the outer contour parabolic coating. The coating is sewn, at the ends of the peripheral branches 10, at points lob, it is fixed by a sewn binding 6a, to a short arm i0a peripheral branches 10, connected by means of a wire or a loop 6a to a short arm 10a of the peripheral branches 10, connected by means of a wire or a loop 6b to the inner branch 7 and fixed, centrally relative to the coating, between the ring 2 and a cap 20 placed thereon. Between the crown 2 and the stitched connection 6a, the coating 6 passes through the mechanism of scissor levers 7, 8 and the articulated quadrilateral P, without being supported, with a straight line when the coating is

  open. The wire or the loop 6b is adapted to the length of this pace.

  The long rods of the parallelogram of rods or quadrangles

  articulated side P are formed by the scissors arm 8a and by a

  control spacer 11, while the short links are con-

  staked by the scissors arm 7b of the inner branch 7 and by

  the short arm 10a of the peripheral branch 10. Here, the arm of

  8a is the upper long link, the control spacer

  of 11, the lower long rod located below, the scissor arm 7b, the inner short link and the short arm 10a of the outer short link of the articulated quadrilateral P. The arm

  scissors 7b is rotatably connected by means of an articula-

  12, the short arm o10a, the latter to the control spacer 11 by a hinge 13 and the control spacer 11, again at

  forked scissors arm 7b by a hinge 14.

  On the hinge 14, the control spacer 11 is mounted and guided laterally in the fork 7a of the scissor arm 7a, while at its other end, it surrounds by means of a fork 11a the

  short arm O10a of the peripheral branch 10 being guided laterally

  13. The short arm O10a of the peripheral branch

  that 10, in turn, surrounds the scissors arm 8a at its elbow 8d by means of a fork 10a 'being guided laterally, while the

  scissors arm 8a itself has the same lateral guidance in the

  scissors linkage 9 of the fork 7a of the scissor arm 7b. These articulated links laterally guided allow exact alignment of the mechanism of scissor levers 7, 8 of the parallelogram of links P and the peripheral branch 10 in all phases of movement and all positions. The control spacer 11 is preferably also formed of a U-shaped section whose open gutter is turned

  to the scissor arm 8a disposed above.

  The arrangement and constitution described above are generally such that when sliding the slider 3 in the opening direction of the umbrella, the position of Figure 1 towards the ring 2, the mechanism of scissor levers 7, 8 deviates. This, in turn, opens the parallelogram first

  of links or articulated quadrilateral P through the international phase

  approximately according to Figure 7 and then close again

  to the block position where the links are brought closer or

  each other to the point that the articulation 14 connecting the

  Inner yoke 7 or its scissor arm 7b (short inner link) to control spacer 11 (long inner link) is as close as possible to neutral or dead center line D

  parallelogram of rods P, close to the spacer of sou-

  8 or its lower edge 8e - or applies to it by pivoting upward in a clockwise direction, forming

  a support abutment A '- while the hinge 12 connecting the

  support beam 8 or its scissor arm 8a (upper long link

  10a) (the short outer link) approaches the upper edge 11b of the spacer 11 in a clockwise downward direction, to the extent that it takes approximately ci, from the top, a distance equal to the distance of approach between the articulation 14 and the neutral line

  or diagonal D. Finally, the parallelogram of rods or the quadrilateral

  Articulated head P appears in the form of a flattened triangular structure T having an obtuse outer corner, in a tight connection with integrated scissor arms 7b and 8a of the scissor lever mechanism 7, 8. The abutment support A ' can also be obtained when the inner end of the control spacer 11 is applied against

  the lower edge 8e of the support spacer 8. When the articula-

  14 is applied directly against the lower edge 8e, the inner end of the control spacer 11, by its U-shaped profile open upwards, can still drive a little bit the lower edge 8e in the channel of the profile and make even more obtuse and smaller the triangular structure T with its angled outer side

  obtuse defined by the arm 10a. This tight assembly of the shears

  the parallelogram of links allows optimum stabilization of the coating in its central region, which is particularly exposed to deformation or fracture, in particular during stress

  and excessive deformations from wind forces.

  If these excessive stresses increase to the point where there is a reversal of the convexity of the coating upwards, in accordance with the representation of FIG. 4, the outer short link constituted by the short arm O10a of the peripheral branch pivots, a few remaining degrees of angle, relative to the upper edge 11b of the control spacer 11 with formation of a second stop

  support A "against the control spacer 11, so that the paral-

  the link diagram or the articulated quadrilateral P takes a posi-

  completely in combination with the scissor levers mechanism, with the formation of two stabilizing support stops A 'and A. "As a result of this stabilization, appreciable constraints

  are diverted from the central area of the cladding exposed to defor-

  tion or rupture, to the outer region of the peripheral branches

  Flexible means 10, which finally has the effect of largely spare the central region, supported by the mechanism of scissor levers 7, 8 and the parallelogram of rods P. The support stops A 'and A "also avoid the risk of lateral folding or shearing of the parallelogram rods and consequently possible deformation or destruction of these parts or their joints Finally, this special mechanism makes it possible to reduce to normal convexity again.

  the liner returned and stressed, pulling the

  bucket 3 downwards in the direction of arrow R in Figure 7, with the utmost care possible. The race to overcome the constraints (arrow S) is relatively short compared to

  the sliding stroke (arrow R) of the slide 3.

  The support stop A "can be ensured by the fact that the arm

  short 10a of the peripheral branch 10 is placed against the upper edge

  11b of the control spacer 11 (Figure 6). The dead point or diagonal line D of the parallelogram of rods or articulated quadrilateral P, shown as a dotted line in FIGS. 3, 4 and 6, results from the diagonal conducted between the articulations 9 and 13. The coating 6

  can, when the inner branch 7 is opened by its profile in direc-

  coating 6, when folding the umbrella, be pulled by

  the wire or the mouth 6b between the scissors arm 8a and the branch

  7 and be folded so that it is placed in the cavity thereof at the same time as the scissor arm 8a which sinks and so that we can give a small volume section to the folded umbrella . This depression of the scissor arm 8a in the inner branch 7 naturally assumes a suitably thin section of the support spacer 8, as well as the slight insertion of the spacer, if any.

  11 and the scissor arm 8a one inside the other in the position

  of the prescribed block of the parallelogram of rods P requires similar hollow sections, at least in section, of parts 8 and 11,

  with open gutters facing up.

  Instead of a U-section profile, the branch parts can

  also have other hollow profiles in themselves known and / or, as is also known, be formed of round spacers

  or flat arranged parallel side by side.

  The step connection between the inner branch 7 and the spacer

  8, by the scissors joint 9, can be made particularly

  resistance if the inner branch 7 is still engaged,

  the scissors joint 9, in a leg fork 8c 'of the

  8. This is in turn flanked by the fork 7a on both sides, as can be seen in Figure 8, so that the two parts 7 and 8 have a double joint and a double guide the one against the other. The fork 7a may be a separate part attached to the inner branch 7 or may be formed of flank portions

  separated 7a ', 7a', suitably fixed. The leg fork 8c 'available

  1 to 8c "which is inserted and fixed in the hollow profile of the support spacer 8, for example by means of buttons 80. The flank portions 7a ', 7a' can be riveted together to the inner branch 7 by a rivet 81. If, in addition, the inner branch 7 still applies, by its end provided with bearing lugs 7d, 7d, to the scissor joint 9, we obtain an even more stable hinge arrangement with triple support and triple lateral guidance The bearing lugs 7d, 7d may be rotatably disposed within the leg fork 8c ', 8c' or alternatively, each time in the form of position tubes, between the leg fork 8c ', 8c'

and flank portions 7a ', 7a'.

Claims (6)

  1) Shortening umbrella comprising a handle and a crown fixed thereto, to which are articulated inner branches which each apply by means of a scissors joint to a support spacer and are connected, via a scissors arm extending beyond the scissors joint, a control spacer, the support spacer being hinged at one end to a movable slide on the handle and at the other end to a short arm; a peripheral branch, so that the support spacer, by its portion extending from the scissors joint to the short arm of the peripheral branch, forms the long upper link parallel to the control spacer located underneath, this one,   by its outer end, being articulated, below the articula-   connecting the support spacer and the short arm of the peripheral branch to the arm so that it and the scissor arm   of the inner branch form the short links and that the   control and the part of the support spacer located   above it, form the long rods of an articulated quadrilateral   abutment, characterized in that in the open position (FIG.   3) of the coating, the articulation (14) connecting the inner limb   re (7) to the control spacer (11) rests on the lower edge   (8e) of the support spacer (8), at a point as close as possible   sible from the neutral line or diagonal (D) of the articulated quadrilateral (P), or takes a relatively close position relative to this edge, so that the articulated quadrilateral (P) appears as a flat triangular structure (T) having an obtuse outside angle (1) and whose hinge (12) connecting the support spacer (8) to the short arm (10a) of the peripheral branch (10) is located at approximately the same distance from the line of neutral or diagonal (D), from above, that the joint connecting the inner branch   (7) to the control spacer (11), from the bottom.   2) Umbrella according to claim 1, characterized in that one of the short links of the articulated quadrilateral (P), forming the scissor arm (7b), is formed of a fork (7a) supporting and guiding   the scissors joint (9), the support spacer (8) and its articu-   linkage (14) and the other short link of the articulated quadrilateral (P), formed by the short arm (10a) of the peripheral branch (10), guided by one end by means of another fork (10a ') the upper long link (8a) of the articulated quadrilateral (P), so that it can rotate on the hinge (12) and is guided by the other   end so as to be able to turn, in connection with the   the lower end of the articulated quadrilateral (P) or the control spacer (11), on the articulation (13), by another fork (11a) of the outer end of the control spacer (11), and in that the latter, by its upper edge (11c.) naked by its profiled bottom (11d) or by depressions (11d), forms a pivoting stop located in front of the neutral line (D), for the arm short (10a) of the peripheral branch.   3) Umbrella according to any one of claims 1 and 2,   characterized in that the inner leg (7) has a U-shaped profile (U) open towards the outside and towards the covering (6) and accommodating the support spacer (8) when the umbrella is shortened, and in that the support spacer (8) and the control spacer   (11) are formed of hollow U-shaped sections (u, u) arranged in opposite directions.   4) Umbrella according to any one of claims 1 to 3,   characterized in that the scissors joint (9) between the branch   (7) and the support spacer (8) is eccentrically arranged   on the latter, and that the latter is equipped, at its   connected to the short arm (10a) of the peripheral branch, of an elbow   (8d) facing the control spacer (11).   Umbrella according to any one of claims 1 to 3,   characterized in that the inner branch (7), starting from the crown   ne (2), presents in the direction of its scissors arm (8a) a profile thickening constantly.   Umbrella according to claim 2, characterized in that the   branch (7) is applied by means of a bearing flange (7d) of   scissor linkage (9) against a leg fork (8c ') disposed on the support spacer (8), and in that the latter is flanked fork (7a).   7) Umbrella according to any one of claims 2 and 8,   characterized in that the fork (7a) is formed of two parts of flank (7a ', 7a').