Winch, particularly for driving an umbrella

Technical field

The invention relates to a winch, particularly for driving an umbrella according to the preamble of claim 1.

State of the art

Winches are known on several occasions. When fully unwound rope, this rope rewound both in the one and in the other direction on a cable drum will. In certain cases it may be necessary, however, that the Rope are wound only in a certain direction on the cable drum should. In known winches for this a locking ring is provided with latches, the lock the winding of the cable in one direction. For unwinding the Rope off the latch in the known winches, so it initially has no effect at the time of rewinding and again until must be turned on. If the switching forget, this can Coiling of the rope in the opposite direction take place.

In EP-A-1279350, a winch is proposed been, in which a latching device with a releasable braking device combined, which can be operated by a hand crank of the winch. requirement for the correct function is that the locking device is not of Hand is releasable Segregate the switching of the latching device for the braking device and is reversed determined by the direction of rotation of the hand crank. Another prerequisite is that the cable in the correct direction onto the cable drum is wound up, but this is not automatically guaranteed.

A winch according to the preamble of claim 1 is known from US-B-6196242.

Summary of the Invention

The object of the invention is to form a winch so that a wrong Winding direction of the rope on the drum is prevented automatically.

The object is inventively achieved by the characterizing features of claim 1.

The fact that the winch is equipped with a button that when unwound Rope on the running direction of the rope or the winding of the cable on the Responsive cable drum, and which communicates with a blocking member which incorrect winding direction with the cable drum assigned the wrong Winding direction locking stop cooperating, is automatically assured, that the winding of the rope is always done in the correct direction.

Advantageous embodiments of the winch are defined in claims 2 to thirteenth

According to claim 2 may be biased in the locked position of the button. According to Claim 3 is also an embodiment is possible in which the push button in exemption is biased. In principle, it is possible that the probe only occasionally at the cable drum is effective, but more advantageously is an embodiment defined in claim 4, whereupon the probe is stationary and arranged over the entire length of the cable drum is.

Particularly preferred is an embodiment according to claim 5, according to which the feeler is arranged on both sides in each case on an arm of a two-armed rocker which to an axis is pivotably arranged, which are parallel to the axis of the cable drum and is arranged at a radial distance therefrom. The locking member is then provided on the other arm of the rocker. This winch is responsive to the incoming direction the rope to. For this purpose, it is expedient if the winch after Claim 6 is further formed, and the axis of the rocker as a cable drum overarching guide rod is designed that the rope a specific guide imparts improved and the response of the probe.

The claim 7 discloses an alternative embodiment of the push button, wherein this as a pre-stressed in the direction of the surface of the rope drum shifter is configured, on which the locking member is arranged. The locking member runs at wrong direction of rotation of the cable drum against the stop. With proper direction of rotation saith the button on the rope wrap and lifts the locking member from the locking portion of the abutment from.

Particular advantages of the winch arise in particular when the Winch according to claim 8 with a releasable locking device, and a releasable Braking device is fitted, the combined and the Winch can be operated. A particularly useful aspect of this combined Locking device and the braking device is defined in claims 9 to 13 defined.

Brief Description of Drawings

Embodiments of the invention will be described with reference to the drawings described in more detail, show this:<dl tsize="8" compact="compact"><dt>Figur 1</dt><dd>one attached to a cantilever umbrella with a known Winch as drive, in the closed state;</dd><dt>Figur 2</dt><dd>the application for entering the screen of Figure 1 umbrella pole with an open umbrella on a larger scale and in side view;</dd><dt>Figur 3</dt><dd>the umbrella pole of Figure 2 in vertical section and on a larger Scale;</dd><dt>Figur 4</dt><dd>a first invention according to winch in perspective and exploded representation;</dd><dt>Figur 5</dt><dd>the winch of FIG 4 in "exemption" in view of the cable drum;</dd><dt>Figur 6</dt><dd>shows the winch of Figure 5 in section VI-VI of Figure 5;</dd><dt>Figur 7</dt><dd>shows the winch of Figure 5 in section VII-VI of Figure 5;</dd><dt>Figur 8</dt><dd>the winch of FIG 5 in "blocking position";</dd><dt>Figur 9</dt><dd>shows the winch of Figure 8 in section IX-IX of Figure 8; </dd><dt>Figur 10</dt><dd>a second inventive winch in perspective view;</dd><dt>Figur 11</dt><dd>a third inventive winch in vertical section;</dd><dt>Figur 12</dt><dd>shows the winch of Figure 11 in "exemption" in section XI-XI of figure 11; and</dd><dt>Figur 13</dt><dd>shows the winch of Figure 12 in "blocking position".</dd></dl>

WAYS OF CARRYING OUT OF THE INVENTION

Figures 1 to 3 show a screen 2 in the closed state, the one to Arm 4 is arranged, which extendible secured to a stand 6 is. Such a screen is known for example from CH-A-367 290 and 666 166th This known screen 2 has a screen frame on which a crown 8 contains, which is connected via a ball joint 10 to the boom 4th At the Krone 8 are hinged roof bars 12 extending over a support bars 14 to Slide 16 support. The slider 16 and the crown 8 are on a screen Stock 18 interconnected.

This screen is described in EP-A-1279350 with a winch equipped as driving. The umbrella pole 18 includes a first lower Stock part 20 which is connected to the slider 6, wherein it in an opening of the Slide 16 is inserted and secured by means of a fuse 21 from sliding out is. At the lower end of the stick part a winch 22 is located, the is operated by a hand crank 24th Next the umbrella stick contains 18 a second upper floor part 26, which is connected to the crown. 8 With closed Screen according to Figure 1, the first floor part 20 and the second floor part 26 separated from each other and connected to each other only via a cable 28 of the winch 22nd When screen is open, the floor parts 20 and 26 via a coupling device 30 connected to each other, as shown in Figures 2 and 3 apparent. The coupling device 30 is formed by a profiled Pin 32 on one of the floor members 20, provided with a socket 34 of the other Stock part 26 cooperates with the socket with a corresponding counter profile 36 fitted to a non-rotatable connection between the floor parts 20 to achieve 26th The rope 28 is through the hollow floor parts 20, 26 is guided substantially coaxially to the axis 35 and on the inside of Bush 34 of the coupling device 30 by means of a seal 37 or a node attached.

The first floor part 20 has the winch 22 with the hand crank 24th Further, the first floor part 20 equipped with a ring-like handle 38, which transverse to the axis of the winch 22 down and the housing 40 of the Winch is formed. In the present example of the first floor member 20 Housing 40 of the winch 22 and the ring-like handle 38 configured integrally and they are formed of two mold halves 42a and 42b in a vertical Midplane 44 abut which transverse to the axis of the winch 22 is aligned.

The winch 22 is formed from the winch 24 mounted on an axle 46 is, which is mounted in a cable drum 48th The cable drum is in turn , Mounted in bearing plates 50a 50b of the housing 40th The cable drum is used to Winding and unwinding of the cable 28. The winch 22 is provided with a catch device 52 fitted to the screen frame and thus the screen when open to keep. This locking device is combined with a braking device 54, enables a controlled closing of the umbrella.

The locking device 52 consists of a free on the rope drum 48 rotatable Ratchet 56 on which a pawl 58 engages, which is mounted in the housing 40 and is biased by a spring 60 against the ratchet. The axis 46 is via a flange 62 and a disc 64 on the ratchet 56 on. The coaxially arranged in an opening 66 of the rope drum 48 the axis 46 is connected via a Threaded connection associated with this and for this purpose has an external thread 68 which cooperates with an internal thread 70 of the opening 66 of the cable drum.

The operation of the winch 22 with the locking device 52 and the braking device 54 is as follows:

If the hand crank 24 is rotated clockwise to open the screen, so is the external thread 68 of the shaft 46 further into the internal thread 70 of the 28 cable drum braked 48 screwed through the train of the rope, which the flange 62 of the axis 46, the brake disc 64 against the ratchet 56 presses and these are fixed on the cable drum 48th This is the hand crank 24 with the Cable drum 48 is connected, and the cable 28 can be wound, wherein the Latch 58 at the ratchet 56 from rotating back the verkuppelten cable drum prevented. Should the screen be closed, the winch 24 is in Counterclockwise moved, so that the axis 46 via the external thread 68 is screwed out of the cable drum 48 and the pressing of the flange 62 fans on the disc 64 in the sense of a slipping clutch. As soon as the braking force of the brake disc 64 is smaller than the tensile force of the cable 28 the cable drum 48, the effect of the locking device 52 is turned off and the Cable 28 starts from the cable reel 48 expire. If the hand crank 24 is stopped, so the tension of the cable causes a further rotation of the cable drum 48 and thus a tightening of the external thread 68 and the internal thread 70, which increases the braking force on the brake disc 64 to the cable drum 48 comes to a standstill. Only by re turning back the hand crank 24 in the counterclockwise direction, the unwinding of the cable 28 and thus the Closing of the umbrella are required to operate. In this manner, a Controlled closing the shade possible.

For a rapid closing of the umbrella, the winch 22 is still a Freilaufvorhchtung 71 equipped with a free-running button 72 on the winch 24 side facing away from the housing 40 is disposed. The freewheel button 72 includes a retaining pin 74, the counter against a locking profile 76 of the cable drum 48 the force of a biasing spring 78 is movable. The freewheel device 71 now contains a further remote from the winch 24 side of the axis 46 arranged axis extension 80 with a locking device 81 that a Block 82 carries, via a spring 84 with the front side facing the 86 Cable drum 48 cooperates. The extension shaft 80 has a thread 88 on carrying the trained native stop 82nd A snap ring 90 with a radially inwardly pointing latching lug engages in a groove 92 in the Extension shaft 80 of the axis around an inadvertent movement of the stop 82 to prevent.

The operation of the Freitaufvorrichtung 71 is as follows:

Pressing the freewheel button 72 of the locking pin 74 with the locking profile 76 is 48 is brought into engagement of the rope drum and the rope drum 48 is blocked. In this State, the hand crank 24 can be rotated further in the counterclockwise direction, to the external thread 68 and the internal thread 70 as far as achieved in that no Friction joint between the brake disk 64 and the ratchet 56 is. At the same time doing the stop 82 presses the spring 84 against the end face 86 of the cable drum 48, so that the cable drum 48 and the axis 46 are blocked and the external thread 68 and the internal thread 70 is not more relative to each other can move. This prevents that the brake disc 64 can be effective on the ratchet 56th Now, if the freewheel button 72 left los, so the cable 28 rolled up under the tensile force of the rope 28 from the rope drum 48 off and turns the cable drum 48 and the handle associated with this. The blocking of the locking device 81 is released and the braking device 54 and the latching device 52 are activated again when the handle 24 at elevated cable in a clockwise direction, ie in the opening direction the screen is moved, whereby the stop 82 from the end face 86 free comes and the clamping action of the brake disc 64 begins to operate again.

The inventive cable winch according to Figures 4 to 10 is suitable for various Uses suitable, but especially in connection with a Winch 22 of the type mentioned above, it will therefore for the subsequent Description of the above reference numerals for the same parts and with respect Full training will be made to the above description.

Figures 4 to 9 show an embodiment of an inventive Winch 22a having a button 100, the on in fully unwound cable 28 the incoming direction of the cable responsive to the rope drum 48a and a Locking member 102 is in communication, which, in case of wrong winding direction with a the cable drum 48a associated, locking the wrong winding direction Stop 104 interacts.

The probe 100 extends 48a over the entire length of the rope drum and is attached to an arm 106 of a two-armed rocker 108 at an axis 110 is pivotably mounted. The axis 110 is on both sides of the cable drum 48 fixedly arranged bearing plates 50a, 50b attached. The second arm 112 of the Rocker 108 includes the locking member 102 which cooperates with the stop 104, which is attached to the cable drum 48th A spring 114 is attached to the axle 110 fixed and supported with one spring arm 116 on the housing 118 from and tensioned with the other arm 120 of the switch 100 in exemption before. the Cable drum 48a cross axis 110 also acts as a guide for the Cable 28, as shown in Figures 7 and 9 in detail. If the rope according Figure 7 wound in the right direction ( "On" in Figure 4), so is the stylus 100 in the exemption shown in FIG. 7 If the winding direction However, in the wrong direction ( "closed" in Figure 4) so ​​raises the incoming cable 28 the button 100 in the locked position to, in which the locking member 102 with the stop 104 cooperates, as is evident from FIG. 9 A further rotation of the Crank 24 is then blocked.

10 shows a further embodiment of the inventive Winch 22b, in which a push button 122 is configured as a slide 124, which practically radially against the cable drum 48 is deliverable. Springs 126 bias the Slide 124 against the cable drum 48b before. The slider 124 is provided with locking members 128 equipped that cooperate with stops 130 which on lateral Flanges 132 are disposed of the cable drum 48b. The arrangement is such taken that in the wrong direction of rotation (counter-clockwise) the Locking members 128 are present at the stops 130, thereby further rotation the cable drum 48b prevented in the wrong direction of rotation. If the cable drum however, 48b driven in the correct direction of rotation (clockwise) so the locking members 128 are invalid. The turns of the cable 28 on the cable drum 48b raise the probe 122 progresses winding process further off, whereby the locking members 128 increasingly from the stops 130 radially removed and thus become ineffective, so the winch for unwinding of the cable 28 in the opposite direction so long as to be freely rotatable the switch 122 detects that the rope 28 is completely unwound from the cable drum 48b is.

Figures 11 to 13 show a further embodiment of an inventive Winch 22c and with a combined latching device 52a Brake device 54a is equipped and has a button 100a, the analog that of figures 4 is formed up. 9 When fully unwound cable 28 saith the button 100a on the incoming direction of the cable onto the cable drum 48c and is connected to a locking member 102a in conjunction, which in the wrong winding direction with, the rope drum 48c assigned the wrong winding direction blocking stopper 104a cooperates.

The button 100a extends 48c over the entire length of the rope drum and is attached to an arm 106a of a two-armed rocker 108a on an axis 110a is mounted pivotally. The axis 110 is on both sides of the cable drum 48c fixedly arranged housing sides 134 attached. The second arm 112a of the Rocker 108a contains the locking member 102a, which interacts with the stop 104a, which is attached to the cable drum 48c. Instead of the spring 114 in the example of figures 4 to 9, the rocker 108 is in this example, at the first Arm 106a provided with a mass piece 136, which by gravity the mass piece 136 the bias of the rocker 108a causes in exemption. The cable drum 48c overarching axis 110a in turn acts simultaneously as A guide for the cable 28, as shown in Figures 12 and 13 can be seen in detail. If the rope as shown in FIG 12 is wound in the "right" direction, so is the switch 100a in the "exemption" shown in FIG 12th If the winding direction However, in the "wrong" direction, pivoted the incoming Rope 28 the button 100a in "blocking position", in which the locking member 102a with the Stop 104a cooperates, as is apparent from FIG. 13 Further rotation the hand crank 24a is then blocked.

To form the locking device 52a combined braking device 54a , the rope drum 48c a from the housing side 134 projecting stub shaft 138, which is on the housing side is provided with a support flange 140th At the support flange 140 is a brake disc 64a, followed by a catch rim 56a and a pressure plate 142 against which the end face 144 a Threaded sleeve 146 is present, on a threaded portion 148 of the shaft stub 138 is screwed. The threaded sleeve 146 forming part of the Winch 24a of the winch 22c. A arranged at the free end of the shaft stub Stop 150 prevents in the form of a held by a nut washer unintentional unscrewing the hand crank 24a of the stub shaft 138. With the ratchet 56a acts a biased by a spring 60a Latch 58a together, which is fixedly mounted in a housing 152nd

The operation of the winch 22c is as follows:<sl><li>For winding of the cable 28, the winch 24 is moved clockwise, whereby the handle 24a, the threaded sleeve 146 onto the threaded portion 148 is screwed, while the front side 144, the pressure plate 142 against the Ratchet 56a suppressed until this between the brake disc 64a and the thrust washer is locked 142nd The ratchet 56a and the engaging latch 58a prevent reverse rotation of the winch and thus unwinding the rope 28. For unwinding the cable 28 is the hand crank 24a counterclockwise rotated, due to the blocking action of the latching device 52a, the threaded sleeve 146 is unscrewed at the threaded portion 148 and thereby the pressing force is reduced on the thrust washer 142, thus also the locking the locking ring 56a is reduced and the rope drum 48c under the Tension of the rope 28 can move in a counterclockwise direction and also Rope 28 discharges. But this in turn causes a screwing the threaded sleeve 146 onto the threaded portion 148 and thus re-clamping the Locking ring and thus brakes the rope sequence. By controlling the rotation of the Winch 24a counterclockwise can thus an equally stunted, the ie controlled draining of the rope 28 are achieved by the rope drum 48c.</li></sl>

In particular, the winch of Figures 11 to 13 is preferably suitable for Umbrellas according to WO97 / 04682 and WO01 / 52686th

LIST OF REFERENCE NUMBERS

<dl tsize="4" compact="compact"><dt>2</dt><dd>umbrella</dd><dt>2a</dt><dd>umbrella</dd><dt>4</dt><dd>boom</dd><dt>6</dt><dd>stand</dd><dt>8</dt><dd>crown</dd><dt>10</dt><dd>ball joint</dd><dt>12</dt><dd>roof bars</dd><dt>14</dt><dd>support rods</dd><dt>16</dt><dd>pusher</dd><dt>18</dt><dd>screen Stock</dd><dt>20</dt><dd>first floor part</dd><dt>20a</dt><dd>first floor part</dd><dt>21</dt><dd>backup</dd><dt>22</dt><dd>winch</dd><dt>22a</dt><dd>winch</dd><dt>22b</dt><dd>winch</dd><dt>22c</dt><dd>winch</dd><dt>24</dt><dd>Handkurbel</dd><dt>24a</dt><dd>Handkurbel</dd><dt>26</dt><dd>second floor part</dd><dt>28</dt><dd>rope</dd><dt>thirty</dt><dd>coupling device</dd><dt>32</dt><dd>spigot</dd><dt>34</dt><dd>socket</dd><dt>35</dt><dd>Axis of 18</dd><dt>36</dt><dd>counter profile</dd><dt>37</dt><dd>seal</dd><dt>38</dt><dd>ring-like grip</dd><dt>40</dt><dd>housing</dd><dt>42a</dt><dd>Formhälfte</dd><dt>42b</dt><dd>Formhälfte</dd><dt>44</dt><dd>midplane</dd><dt>46</dt><dd>axis</dd><dt>48</dt><dd>sail Drum</dd><dt>48a</dt><dd>sail Drum</dd><dt>48b</dt><dd>sail Drum</dd><dt>48c</dt><dd>sail Drum</dd><dt>50a</dt><dd>Lagerplatten</dd><dt>50b</dt><dd>Lagerplatten</dd><dt>52</dt><dd>Rastvorrichtung</dd><dt>52a</dt><dd>Rastvorrichtung</dd><dt>54</dt><dd>braking device</dd><dt>54a</dt><dd>braking device</dd><dt>56</dt><dd>Rastkranz</dd><dt>56a</dt><dd>Rastkranz</dd><dt>58</dt><dd>Rastklinke</dd><dt>58a</dt><dd>Rastklinke</dd><dt>60</dt><dd>feather</dd><dt>60a</dt><dd>feather</dd><dt>62</dt><dd>flange</dd><dt>64</dt><dd>Brake</dd><dt>64a</dt><dd>Brake</dd><dt>66</dt><dd>opening</dd><dt>68</dt><dd>external thread</dd><dt>70</dt><dd>internal thread</dd><dt>71</dt><dd>Freewheel device</dd><dt>72</dt><dd>Freewheel button</dd><dt>74</dt><dd>retaining pin</dd><dt>76</dt><dd>locking profile</dd><dt>78</dt><dd>biasing spring</dd><dt>80</dt><dd>Extension shaft</dd><dt>81</dt><dd>Blockiervorrichtung</dd><dt>82</dt><dd>stop</dd><dt>84</dt><dd>feather</dd><dt>86</dt><dd>End side of 48</dd><dt>88</dt><dd>thread</dd><dt>90</dt><dd>circlip</dd><dt>92</dt><dd>Nut</dd><dt>100</dt><dd>button</dd><dt>100a</dt><dd>button</dd><dt>102</dt><dd>locking member</dd><dt>102a</dt><dd>locking member</dd><dt>104</dt><dd>stop</dd><dt>104a</dt><dd>stop</dd><dt>106</dt><dd>Arm</dd><dt>106a</dt><dd>Arm</dd><dt>108</dt><dd>seesaw</dd><dt>108a</dt><dd>seesaw</dd><dt>110</dt><dd>axis</dd><dt>110a</dt><dd>axis</dd><dt>112</dt><dd>Arm</dd><dt>112a</dt><dd>Arm</dd><dt>114</dt><dd>feather</dd><dt>116</dt><dd>Federarm</dd><dt>118</dt><dd>housing</dd><dt>120</dt><dd>Federarm</dd><dt>122</dt><dd>button</dd><dt>124</dt><dd>pusher</dd><dt>126</dt><dd>feather</dd><dt>128</dt><dd>locking member </dd><dt>130</dt><dd>stop</dd><dt>132</dt><dd>flange</dd><dt>134</dt><dd>housing side</dd><dt>136</dt><dd>Massestück</dd><dt>138</dt><dd>stub shaft</dd><dt>140</dt><dd>supporting flange</dd><dt>142</dt><dd>thrust washer</dd><dt>144</dt><dd>front</dd><dt>146</dt><dd>threaded sleeve</dd><dt>148</dt><dd>threaded portion</dd><dt>150</dt><dd>stop</dd><dt>152</dt><dd>housing</dd></dl>