DE10202891B4 - Stand for mounting rod-shaped parts - Google Patents

Abstract

Stand for mounting rod-shaped parts, in particular Christmas trees,
with a plurality of retaining elements (3) arranged in a ring around the attachment end of the rod-shaped part,
each of which by means of a clamping device from an open position in which the rod-shaped part is inserted between the holding elements (3), against the action of a return spring in a holding position is pivotally, in which the holding elements (3) on the rod-shaped part under exercise of holding forces issue,
wherein the holding element (3) is pivoted in its holding position by an angle from the open position against the rod-shaped part and
a device for deceleration acting as a friction brake when the holding element (3) is brought into its open position is formed, which causes a continuous deceleration of the holding element (3).

Description

The The invention relates to a stand for clamping rod-shaped Sharing, especially of Christmas trees, with several coronal retaining elements arranged around the attachment end of the rod-shaped part, each of which by means of a clamping device from an open position, in the the rod-shaped Part can be used between the holding elements, contrary to the effect a return spring is pivotable in a holding position, in which the holding elements the rod-shaped Part under exercise of holding forces abut, wherein the holding element in its holding position to a Angle from the open position is pivoted against the rod-shaped part.

Such stands are from the DE 39 32 473 C2 and the DE 199 03 634 A1 known. A widely used version of this stand has a clamping device in the form of a winch with latch, through which a steel cable is stretched. The steel cord is slidably guided in the form of a closed loop through guide bores located in the support members. Characterized all clamping elements are transferred from its open position into a more angular holding position during clamping of the clamping device in which they claw-like embrace the attachment end of the rod-shaped part and clamp in the desired position. If the rod-shaped part to be removed from the stand, so only the clamping device must be solved.

there However, make sure that the retaining elements after the Solve the Clamping device actually to return to their open position. Also a loose in the guide holes namely steel rope can namely cause the holding elements in a position despite dissolved clamping device remain loose in the attachment end of the rod-shaped part issue. You need to then be manually returned to their open position by hand.

To simplify the operation, therefore, according to the DE 39 32 473 C2 and the DE 199 03 634 A1 already provided return springs, each of which acts on a retaining element and this lead back to the release position after releasing the clamping device. These springs may be, for example, coil springs, which pivot back after releasing the clamping device freely movable holding element in the open position until it comes to rest on a stop.

such Return springs are also in a still proposed, counting to the state of the art embodiment makes sense in which each holding element provided with its own clamping device is, for example, by a pressurized fluid such as a hydraulic fluid or Compressed air actuated becomes.

In DE 299 05 454 U1 a Christmas tree stand is described in which the tensioning of the tree is done by means of the weight of the tree. In this stand, the holding elements are also arranged in a ring around the attachment end of the tree.

Of Further are return springs attached to the holding elements, which when lifting the tree put the retaining elements in their rest position. When quickly removing of the tree, the retaining elements by these return springs as well quickly brought to rest.

The provision The holding elements by coil springs has been proven in practice and with helped to make such stands easy to use and reliable work. For high demands on the performance characteristics such stand However, the following problem arises: so that the retaining elements after releasing the Clamping device reliable to return to their open position, must be the return spring of considerable strength be. In addition, it is also in the clamping position of the holding elements the strongest curious, because this is the holding element its most angled Position has. The retaining element thus undergoes its release a considerable acceleration and finally gets along a high rotational speed in its final position. That's about the same time Successful striking all Retaining elements at their end stops causes a hard and loud noise, which many users is perceived as unpleasant. This is especially the case when the holding elements and the supporting or supporting them Parts are made of metal.

moreover means a hard abutment of the retaining elements in the open position Also that the holding elements, their bearings and end stops wear out. to Remedy would be For example, elastic buffer conceivable, however, exposed to heavy wear would be because just the holding elements on them more or less abruptly come to a standstill.

Of the Invention is therefore the object of a stand of the to provide the aforementioned type, in which the holding elements without noise pollution and without the risk of increased wear their holding position are returned to the open position, but the proven Principle of a principle simple design, reliable maintained functioning and inexpensive to be produced stand shall be.

The solution succeed with a stand with the features according to claim 1.

Thereby, that the retaining element braked, but not abruptly stopped is, results in the desired low-noise and low-wear function. Since the arrangement for braking only when entering the holding element is effective in its open position, is the spontaneous release and repatriation of Retaining elements from their holding position, however, still guaranteed.

Because the arrangement for braking the retaining element as a friction brake is formed, which causes a steady delay of the holding element, This results in particularly simple mechanical embodiments that are economical are to produce.

One particularly advantageous proposal for a further embodiment is that the existing on each retaining element return spring as Arrangement for braking is formed, depending on is effective from the angular position of the holding element.

there becomes an embodiment preferred in which the return spring a tortuous leg spring is whose turn loop inside a serving as a spring stop mandrel is performed with a game and from the at least one spring leg as a function of the angular position of the holding element at different counter stops for Plant comes. By clever arrangement of the different counter-attacks can namely the operation of the return spring changed to its opposite be out of the first accelerating effect at the beginning of the return movement a braking effect at the end of this movement will.

In practice, an embodiment of the stator according to the invention is preferred in which each support member is pivotally mounted about a fixed bearing axis on a foot of the stator, wherein the bearing axis passes through the winding loop of the leg spring and serves as a mandrel in the sense of a spring stop and at the bearing axis in the pivoting plane of the holding elements, three counterstops face outwardly in the region of the spring legs, of which the first is arranged on the foot part, while the second and third counterstop are attached to the holding element; In this case, the transition from the restoring action to the braking action of the leg spring is achieved by the fact that in function of the angular position of the holding element in place of the first counter-stop 12 the third counter-attack 14 comes to effect.

The latter version is still characterized in an advantageous manner that the second Counter stop in the region of the leg end of the holding element associated spring leg is provided while the third counter-stop in the area adjacent to the winding loop region of the foot part associated Spring leg is located. So long as a stronger bend is present of the holding element, the third counter-stop is in the the winding loop adjacent region of the foot part associated spring leg ineffective; as soon as the holding element but its stretched Able to approach, in which it is approximately parallel to the attachment end of the rod-shaped part runs, the third counterstop becomes effective and causes it to loop the loop the leg spring with considerable frictional effect and thus braking pulls against the bearing axis.

Of the on the foot part arranged first counter-attack is expedient in the area the leg end of the foot part associated spring leg. In this way it is achieved that at the beginning of the return movement a considerable acceleration of the holding element takes place, as the for a reliable Solve all Aspiring retaining elements is.

Especially in the execution with a thigh feather leaves the stand according to the invention is economical manufacture and assemble; because this is according to a preferred embodiment each retaining element together with the bearing axis, the bearing block and the tortuous leg spring assembled to a preassembled unit, as a whole in the foot part of the stand is.

The Invention will follow explained in more detail in an embodiment shown in the figures. In The drawings show the following:

1 shows a holding element in its angled holding position, in which it bears against the attachment end of the rod-shaped part.

In 2 is that in 1 shown holding element shown in an intermediate position while

3 illustrates the final state in which the holding element has reached its open position.

The figures show only essential to the invention details of the holding element and its storage, because the remaining structure of a stator according to the invention can be assumed to be known and, for example, in the DE 39 32 473 C2 and the DE 199 03 634 A1 described in detail ben is.

Such a stand has a footboard, with which it is placed on the floor. The foot part is in 1 not shown, but only a bearing block 1 which can be inserted, for example, in an opening of the foot part. In the bearing block 1 there is a bearing axis 2 which is non-rotatably connected to the bearing block, and to which a holding element 3 is pivotable. In 1 is the holding element in its angled holding position, in which it with the contact point 5 engages the outer circumference of the rod-shaped part and thereby clamped in its position.

Each retaining element 3 is with a pilot hole 4 provided by a steel cable or the like sliding. passed through. The steel cable is attracted by a common clamping device and thereby pulls all the holding elements 3 which surround the rod-shaped part in a ring shape, inwardly against the attachment end of the rod-shaped part.

The figures also show a tortuous leg spring 6 that made a loop of turns 7 and two spring legs 8th and 9 consists. Here is the spring leg 8th the holding element 3 assigned during the spring leg 9 extends in the area of the bearing block, so the foot part.

The bearing axis 2 at the same time serves as a mandrel for the winding loop 7 the thigh feather 6 , where the winding loop 7 surround the thorn with play.

The thorn 2 works with the three counter-attacks 12 . 13 and 14 together. Of these, the first counter-attack 12 on the bearing block 1 arranged. He works with the leg end 11 of the spring leg 9 together and is in the area of its end 11 ,

The second counter-attack 13 and the third counter-attack 14 are located on the retaining element 3 , This is the second counter-attack 13 in the region of the leg end 10 provided during the third counter-attack 14 in the area of the winding loop 7 located.

It should be noted that the third counter-attack 14 although on the holding element 3 is arranged or formed, but that he only with the spring leg 9 interacts with the bearing block 1 , that is assigned to the foot part.

With the arrow 15 the pivoting direction is indicated, with which the holding element 3 through the thigh spring 6 is set in motion.

The operation of the stator shown in its details is the following:
According to 1 is a holding element 3 with his investment point 5 at the attachment end of the rod-shaped part. It is here stretched by a steel cable, which passes through the guide hole.

When the clamping device belonging to the stand is released and the steel cable is loosened, the leg spring can become loose 6 be effective. In the out 1 apparent angled position of the retaining element 3 is the leg spring between acting as a mandrel bearing axis 2 and the counter-attacks 12 and 13 clamped. The third counter-attack 14 is ineffective. Because the leg spring 6 the desire to relax and stretch, it puts the retaining element 3 in a pivoting movement according to the directional arrow 15 , The holding element 3 is thus by the leg spring 6 accelerated to a rotary or pivoting movement.

The holding element 3 As a result, moves with increasing rotational speed up to the in 2 illustrated position (transition), in which both the first counter-stop 12 as well as the third counter-attack 14 on the spring leg associated with the foot part 9 issue.

The holding element 3 now continues its pivotal movement, with the spring leg 9 from the first counter-attack 12 takes off. The foot part associated spring leg is then only on the third counter-attack 14 on, which is in the area of the winding loop 7 located. The spring now exerts no accelerating effect on the holding element 3 out. Rather, it is under the action of the thorn 2 on the one hand and the second counter-attack on the other 13 and the third counter-stroke 14 on the other hand. Since these are both on the holding element 3 and the third counter-attack 14 near the bearing axis 2 is arranged, the winding loop 7 due to their bias against the bearing axis 2 pressed. This results in a strong friction effect between the bearing axis 2 and the winding loop 7 , Thus, from the accelerating effect of the leg spring 6 become a braking effect.

The reverse arrangement is possible by the first counter-stop is assigned to the retaining element, while the second and the third counter-attack on the bearing block, so the foot part, are attached. In this case, the bearing axis must be 2 together with the holding element 3 turn so that the squeezed loop turns 7 the bearing axis and thus the retaining element acted upon by friction braking.

The described arrangement works despite their simple construction very reliable, the Transition from the acceleration effect on the brake is clearly noticeable and leads to a low-wear and noise-reducing operation.

The 1 to 3 let continue to recognize clearly that bearing block 1 , Bearing axis 2 , Holding element 3 and thigh feather 6 manufacturing technology can be conveniently assembled into a preassembled unit and used as a whole in the foot of a stand.

1

bearing block

2

bearing axle

3

retaining element

4

guide bore

5

contact point

6

spiral Leg spring

7

loop winding

8th

the Retaining element associated spring leg

9

the footboard associated spring leg

10

leg end

11

leg end

12

first counterstop

13

second counterstop

14

third counterstop

15

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Claims (7)

Stand for mounting rod-shaped parts, in particular of Christmas trees, with a plurality of holding elements arranged in a ring around the attachment end of the rod-shaped part ( 3 ), each of which by means of a clamping device from an open position in which the rod-shaped part between the holding elements ( 3 ) is used, against the action of a return spring in a holding position is pivotally, in which the holding elements ( 3 ) abut on the rod-shaped part under the exercise of holding forces, wherein the retaining element ( 3 ) is pivoted in its holding position by an angle from the open position against the rod-shaped part and a upon arrival of the holding element ( 3 ) is formed in its open position effective arrangement for braking as a friction brake, which is a continuous delay of the holding element ( 3 ) causes. Stand according to claim 1, characterized in that on each holding element ( 3 ) existing return spring is designed as an arrangement for braking, which depends on the angular position of the retaining element ( 3 ) becomes effective. Stand according to claim 2, characterized in that the return spring is a wound leg spring ( 6 ) whose winding loop ( 7 ) is guided inside on a mandrel serving as a spring stop with play and of the at least one spring leg in dependence on the angular position of the holding element ( 3 ) at different counter-attacks ( 13 . 14 ) comes to the plant. Stand according to claim 3, characterized in that each retaining element ( 3 ) around a fixed bearing axis ( 2 ) is pivotally mounted on a foot part of the stand that the bearing axis ( 2 ) the winding loop ( 7 ) of the leg spring ( 6 ) and acts as a mandrel in the sense of a spring stop and that the bearing axis ( 2 ) in the pivoting plane of the holding elements ( 3 ) three counter-attacks ( 12 . 13 . 14 ) outside in the region of the spring legs ( 8th . 9 ), of which the first ( 12 ) is arranged on the foot part, while the second and the third counter-stop ( 13 . 14 ) on the retaining element ( 3 ), wherein the transition from the restoring action to the braking action of the leg spring ( 6 ) is due to the fact that in dependence on the angular position of the holding element ( 3 ) in relation to the rod-shaped part instead of the first counter-abutment ( 12 ) the third counter-attack ( 14 ) comes into effect. Stand according to claim 4, characterized in that the second counter-stop ( 13 ) in the region of the leg end ( 10 ) of the retaining element ( 3 ) associated spring leg ( 8th ), while the third counter-attack ( 14 ) in which the winding loop ( 7 ) adjacent region of the foot part associated spring leg ( 9 ) is located. Stand according to claim 4 or 5, characterized in that arranged on the foot part first counter-stop ( 12 ) in the region of the leg end ( 11 ) of the foot part associated spring leg ( 9 ) is located. Stand according to one of claims 3 to 6, characterized in that each retaining element ( 3 ) together with the bearing axis ( 2 ), the bearing block ( 1 ) and the tortuous leg spring ( 6 ) is assembled into a preassembled unit, which is inserted as a whole in the foot part of the stand.