DE102020119745A1 - Height-adjustable mast and/or extension arm - Google Patents

Abstract

The invention relates to a height-adjustable mast and/or extension arm, for example the extension arm of a standing umbrella, in particular a so-called traffic light or pendulum standing umbrella. The present invention provides for the first time a structure for adjusting the height of a mast, for example a parasol, in which the weight of the mast plus the weight of the canopy is opposed by a gas pressure spring.

Description

The invention relates to a height-adjustable mast and/or extension arm, for example the extension arm of a standing umbrella, in particular a so-called traffic light or pendulum standing umbrella. In the latter stand-umbrella constructions, the mast is arranged on the side, not in the middle.

It is always the heavy canopy whose weight must be compensated for when erecting it so that a mast can be adjusted in height and/or an umbrella can be opened. With free-standing umbrellas, especially with large umbrellas, there is a center mast construction in which the umbrella struts can be moved radially towards the middle umbrella mast when the umbrella is closed. In the case of a side mast umbrella such as the pendulum umbrella, the canopy is closed using a cantilever arm that is moved down and towards the mast on the side.

Both the mast for center mast and side mast umbrellas and the extension arm for cantilever or pendulum umbrellas are preferably designed for large umbrellas in such a way that they only reach their final length when unfolded. The length of the mast or the extension arm can therefore usually be adjusted on large parasols.

There are various mechanisms for this, including pulley blocks, internal and external spindle and/or rack and pinion drives, telescopic sliding rods, etc., so that a mast and/or extension arm can be adjusted in length.

Depending on the size of the parasol, there is a considerable weight on the parasol roof suspension, which is moved with the extension of the mast and/or extension arm.

It is known that the length of the mast is lengthened telescopically, for example when the canopy of a central mast umbrella is opened, by a length that is required by the canopy struts to open the canopy.

With small parasols, the mast is divided into two, so that one half serves as a shaft and the second half of the mast with the canopy can be moved within the shaft to adjust the height.

In the case of large parasols, such as those used in gastronomy, dividing the shaft into two is unthinkable because this would be unmanageable due to the weight of the canopy.

The object of the present invention is therefore to provide a structure for adjusting the height and/or length of a mast and/or extension arm, particularly for free-standing umbrellas, which can be adjusted when the canopy is closed and/or independently of the position of the umbrella struts.

This object is solved by the subject matter of the present invention as disclosed in the description, the figures and the claims.

The solution to the problem and the object of the present invention is therefore a mast and/or extension arm of a parasol, comprising at least a first and a second section, the sections together forming at least part of the mast and/or the extension arm and between the two sections, these connecting along their longitudinal axis, at least one gas pressure spring is provided, via which the at least two sections of the mast and/or the extension arm can be moved relative to one another and along their longitudinal axis.

According to an advantageous embodiment, it is provided that the at least two sections can be pushed into one another in a telescopic manner. According to an advantageous embodiment of the invention, three, four or more sections are provided to form a mast. On the bottom side, the mast, e.g.

Gas springs are usually used to balance the weight of two elements and are known from toolmaking.

A gas pressure spring comprises a piston with a piston rod, which is movably arranged within a gas-filled pressure tube, in particular a cylinder. A gas pressure spring is a pneumatically operated spring, the piston being moved in the cylinder by the pressure of the gas and at least one sealing ring being provided which is located on the piston and has a gas passage opening.

The diameter of the gas passage opening on the one hand and the gas pressure in the cylinder on the other hand largely determine the spring force of a gas pressure spring. In order to use the spring force, the cylinder is connected to one section by means of a spring holder, and the piston is attached to the other section via the piston rod.

It is particularly advantageous if a spring suspension for the piston rod is integrated in the head-side section and a device for receiving the cylinder of the gas pressure spring is integrated in the bottom-side section.

According to an advantageous embodiment of the invention, the at least two sections are tubular. It is particularly advantageous if they have diameters that differ only so slightly from one another that one section can be inserted into the other. However, there are also many alternative solutions for connecting two sections to form a mast. Coupling pieces can be used, plug-lock connections can be provided, etc. There are many known solutions available to those skilled in the art.

For example, the mast completely or partially surrounds the housing of the gas pressure spring in the retracted state. On the other hand, it can also be provided that part of the housing of the gas pressure spring makes up part of the mast.

The gas pressure spring makes it easier for the user to change the height of a mast and/or the length of an extension arm. At least part of the weight is compensated by the gas pressure spring.

The spring suspension at the upper end of the mast, which carries the weight to be compensated, for example the canopy, is preferably provided on the piston side. The spring suspension can be implemented as a cable, screw, hook, loop and/or ball joint, so that twisting of the gas pressure spring is avoided, etc., as well as any other known spring suspension and/or combination of spring suspensions.

On the cylinder side, the gas pressure spring is preferably arranged at the end of the mast pointing towards the mast foot. The cylinder-carrying housing of the gas pressure spring can also be mounted and/or fastened to the section of the mast to be adjusted and/or the extension arm, for example via a recess, screws, hooks, ball joint, etc.

The two ends of the gas pressure spring fastened to the mast and/or to the extension arm, which is adjustable in height or length, can be connected to the respective section in the same way or in a different way.

During operation, the height or length of the mast and/or extension arm is changed by moving the piston in the cylinder of the gas pressure spring.

To move the piston of the gas pressure spring means are provided in and/or on the mast and/or on the extension arm, which directly - ie directly or indirectly - ie indirectly - cause the longitudinal displacement of the piston within the cylinder of the gas pressure spring. The end of the piston rod can be moved, for example, via a slide that can be moved up and down, for example, along the outside of the mast, but within a corresponding slot in the mast.

For example, the upper end of the piston rod can be linked directly or indirectly to a cable winch. The cable winch itself can be operated by a motor, for example an electric motor, a slider and/or a crank.

The electric motor in turn can, for example—at least also—be operated by remote control, so that the user can use the remote control to adjust the height of the mast and/or extend the extension arm.

The means for moving the piston of the gas pressure spring are preferably designed in such a way that the piston can be fixed not only in the respective end positions, i.e. fully retracted or fully extended out of the cylinder, but also in any position relative to the cylinder. In this way, the piston can be held in a predetermined position. On the other hand, a stepless height adjustment of the mast and/or extension arm is also possible by fixing, for example, a slider and/or a cable of a cable winch.

Due to the movement of the piston out of the cylinder or into the cylinder, the mast and/or the extension arm is lengthened or shortened.

According to an advantageous embodiment of the invention, the length adjustment of the mast and/or the extension arm corresponds directly to the length adjustment of the piston within the cylinder of the gas pressure spring.

According to another advantageous embodiment, the length adjustment of the mast and/or the extension arm is translated by the gas pressure spring, so that moving the piston by a specific length causes the mast and/or the extension arm to be adjusted by a multiple or part of this length.

According to an advantageous embodiment of the present invention, a screw connection is provided as a connection for the gas pressure spring on the canopy side. In this case, a screw is provided on the head side of the piston rod, which is screwed into a thread in a form-fitting manner.

According to an advantageous embodiment of this example of the invention is a non-round Provided shape of the piston, which is better secured against rotation within the cylinder than a round, radially symmetrical shape of the piston rod.

• 1 zeigt die beiden Teilstücke 1 und 2 vor dem Zusammenbau
• 2 zeigt die beiden Teilstücke aus 1, aber zusammengesteckt und
• 3 zeigt den Einbau der beiden Teilstücke in den Mast über ein drittes Teilstück des Masts.

The invention is explained in more detail below with reference to 3 figures of an exemplary embodiment of the invention:

• 1 shows the two parts 1 and 2 before assembly
• 2 shows the two parts 1 , but put together and
• 3 shows the installation of the two sections in the mast via a third section of the mast.

1 shows part 1 on the one hand and part 2 on the other 1 The exemplary embodiment of the invention shown has the gas pressure spring with a connection 7 at the bottom in section 1 and a cylinder 3 anchored therein is without connection.

According to 1 the two sections 1 and 2 are not yet connected. Section 2 shows a device 6 for receiving the head-side end 5 of the piston rod 4, for example a thread 6. The thread 6 is connected to a cable winch 8 via a cable. The cable winch 8 is operated via the crank 9.

2 shows the same parts 1 and 2 but built together. Section 2 is pushed over part of section 1 with the lower end. The piston 4 is screwed via its piston rod with its head-side end 5 to the thread 6 in section 2 .

3 finally shows a larger section of the mast 13 than the two previous figures, here three sections 1, 2 and 11 of the mast 13 are shown. The section 1 , which is inserted upwards into the section 2 , is connected to the section 11 via the connection 10 . In this case, the connection 10 is pushed into a complementary element 12 . The two sections 11 and 1 from the 3 therefore have the same diameter and cannot be pushed into one another.

The gas pressure spring can form a part of the mast and/or the extension arm via its housing, via the cylinder, the piston and/or in some other way, ie it can also influence the mast visually. However, this is not mandatory, because gas pressure springs are also very effective in small radii and therefore the gas pressure spring together with the spring suspension can also “disappear” optically in the cavity of the mast and/or the extension arm.

The present invention provides for the first time a structure for adjusting the height of a mast, for example a parasol, in which the weight of the mast plus the weight of the canopy is opposed by a gas pressure spring. The present invention is the first to provide a construction for adjusting the length or height of a mast, for example a parasol, in which the weight of the mast plus the weight of the canopy is countered by a gas pressure spring.

The installation of a gas pressure spring, which is available in very small radii, can be done completely inconspicuously within the mast and/or the extension arm and still have a great effect.

On the other hand, the housing of the gas spring can also enhance the look of the mast and/or extension arm.

Reference List

1

first part

2

second part

3

cylinder

4

Pistons

5

head end of the piston

6

Piston connection

7

connection of the cylinder

8th

winch

9

crank

10

Connection to the third section

11

third part

12

Connection to the first section

13

mast

Claims (12)

Mast (13) and/or extension arm of a parasol, comprising at least a first (1) and a second section (2), the sections (1,2) together forming at least part of the mast (13) and/or extension arm and at least one gas pressure spring with cylinder (3) and piston (4) is provided between the two sections (1,2), connecting them along their longitudinal axis, via which the at least two sections (1,2) of the mast (13) and/or or the extension arm relative toei nander and are movable along their longitudinal axis. mast and/or extension arm claim 1 , At least one further section (11), so a total of three sections, comprehensive. Mast and/or extension arm according to one of the preceding claims, in which the piston (4) of the gas pressure spring with the head end (5) of the piston rod is arranged closer to the canopy than the cylinder (3) of the gas pressure spring. Mast and/or extension arm according to one of the preceding claims, in which the piston (4) of the gas pressure spring is connected directly or indirectly to a cable winch (8) on the head side. Mast and/or extension arm according to one of the preceding claims, in which the cable winch (8) is coupled to a crank (9). Mast and/or extension arm according to one of the preceding claims, in which the cable winch (8) is coupled to an electric motor. mast and/or extension arm claim 6 , in which the electric motor can be controlled via a remote control. Mast and/or extension arm according to one of the preceding claims, which is steplessly adjustable in height. Mast and/or extension arm according to one of the preceding claims, in which the piston (4) of the gas pressure spring is fastened on the head side by means of a screw (5) in a corresponding thread (6) of the section (2). Mast and/or extension arm according to one of the preceding claims, in which the piston rod of the piston (4) of the gas pressure spring is angular or oval. A mast and/or extension arm as claimed in any one of the preceding claims, in which the housing of the gas spring visibly forms part of the mast and/or extension arm. Mast and/or extension arm according to one of the preceding claims, in which the gas pressure spring is arranged invisibly from the outside within the mast and/or extension arm.

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