FR2633000A1 - Telescopic mast with manual or automatic drive - Google Patents

Abstract

Device for deploying a telescopic mast. The invention relates to a mast made up of elements sliding in one another and mounted on a plinth containing the winch for raising the elements. The specific feature of the invention consists in the addition, inside the main mast, of a small mast surmounted by a wheel for the unrolling of the cable making it possible to pull the first element up, which will consequently entrain the following elements. To this element is welded a rigid rod 23 at the base of which the cable is fixed. The length of this rod can at least be equal to the height of the small mast plus that of the plinth and thus makes it possible to increase the height of deployment of the mast. The device according to the invention is particularly intended for the deployment of the telescopic mast without a hydraulic thrust cylinder.

Description

TELESCOPIC MAT
There are known telescopic masts intended to support various accessories. In masts of this kind hitherto realized, the mechanisms are mounted on the upper and outer part of the elements of the mast.

The present invention has "for object a telescopic mast intended to support accessories and in which the stroke-of the accessories is on the contrary re practically equal to the height of the first element of the mast.,
The mast according to the invention can be raised from 3m to 50m, depending on the length and the number of elements.

 It consists of sliding elements, guided by rings, nestled one inside the other, the lower element being fixed on a base that can be further sealed on the ground or on a platform, (fig. 7) folded up and (fig. 1) deployed.

 When the upper element is pulled (fig. 7), it leaves the assembly, guided by the reference rings 2 and 3 in fig. 4.

 At the end of the race, the stop (rep. 2 fig. 4) not being able to leave the 2nd element, drives the latter in turn and so on as many subtle times there will be mobile elements-constituting the mast. When deployed, the mast according to the invention is shown in fig. 1.

 Inside the base and the mast is mounted the drive system of the upper element, the only element to be ~ secured to the drive system.

 This includes a double cable reel (ref. 11), one used to raise the mast, the other, wound in the opposite direction, allows the elements to be lowered in force in the event of guides or deposits seizing up. on the mast, such as dust, ice, rust, etc. and preventing the mast from lowering by its own weight.

 The ascent cable (1) passes through a small mast (ref. 4 fig. 6), fixed in the base as shown (fig. 2 ref. 10).

 The force descent cable (fig. 1 ref. 24) is free in the body of the mat.

 The lifting cable (ref. 1) is on a movable pulley (ref. 8) fixed at the top.

 These two cables (rep. 1-24) descend along the mast to hang on the base of the first element (fig. 7). Under these conditions, when the lifting cable is wound on the winch (ref. 11), the base of the 1st element (ref. 7 fig. 2) will only rise from the height BC of free cable (fig. 7 ).

 The originality of this invention therefore consists in mounting the head element at a height much higher than level C.

 For this, a fixed metal rod of length AB (ref. 23) is rigid, capable of supporting all of the movable elements, at the base of the element (fig. 4 rep. 23) and the drive cable at ( rep. 19 fig. 4).

When the cable is wound up, the head element will rise
an additional AB length.

 The attachment point A may be as low as possible, up to the fixing plate to the ground.

 When the cable is wound down, we will return to A; the descent cable working in traction, if the elements do not descend by their own weight.

 Each element has a quick locking system, and the last, in the case of a round tube, such as a periscope, has a system of quick locking handles, allowing the mast to be oriented in the desired direction.

 This quick release is coupled with a safety lock, in case the cable breaks, but this possibility is unlikely to occur since these are steel or stainless steel cables.

 Mooring is done by 3 or more guys, depending on the height of the mast.

These shrouds are stretched as one leaves the mast and relaxes when the mast is retracted.

 - Z1 is possible to replace the manual lifting with the mast of the mast with an automatic lifting system by means of an electric motor.

 It goes without saying that the present invention should not be considered as limited to the embodiment described and shown, but on the contrary covers all variants thereof.

Advantages of the mast according to the invention
Regarding the ease of operation: by the absence of cylinders or hydraulic pump requiring constant maintenance and whose operation is random in case of extreme cold, or even freezing (frozen oil)
In terms of corrosion: total protection of the drive system against bad weather and accident risks
In terms of safety: absence of pulleys or gears outside the mast, which could injure a person
On the use and the usefulness of this mast according to the invention t significant gain on the maximum height by an addition of bar fixed to the base of the upper element it fig. 4
Easy release of folding elements
Low production cost
Aesthetics and reliability
Apart from a safety pawl, - a crank and a closed inspection hatch, fixed on the base of the mast, according to the invention, all the rest of the drive system is inside the mast, so its aesthetics are preserved and its maintenance is almost nil (see annexed figures).

1. - It is a versatile support mast
Transmission or reception antenna mast
Mast for driving water turbines (power generation)
Wind turbine training mast
Mast of variable height on a sailing boat
Lift mast with boom having the advantage of being able to
very easy to position at the level of the floor under construction
Support mast for one platform, even for oil
2. - It is intended for many users, such as, for example
- firefighters, gendarmerie, 'cibists, building and public works, installation
antenna readers of all kinds, airfields, individuals
(antenna mast), civil and army sailing boats, farmers
(wind turbines, water pumps, current generators) platforms
trolières
Therefore, its manufacture would surely find a good reception with
a large number of users in a wide variety of fields.

TELESCOPIC MAT
Fig. 1: Diagram of the 5 parts making up the mast
Fig. 2: First element containing the mechanism
Fig. 3: Second element
Fig. 4: Third element
Fig. 5: Ratchet for blocking the developed mast
Fig. 6: Fixed mast located inside the extendable mast
at more than 30m by fast boat
Fig. 7: Mast retracted position
Fig. 8: Arrow
The following references are shown schematically in the figures cited above
Item 1: Cable crossing the fixed mast
Reference 2: Guide and stop of the elements
Reference 3: Guide to the elements
Reference 4: Fixed mast
Benchmark 5: Third element
Reference 6: Second element
Reference 7: First element
Benchmark 8: Cap allowing the last to be blocked
element
Item 9: Pin used to lock the shaft
Reference 10: Tree
Mark it: Double reel
Item 12: Pinion + ratchet blocking assembly
Reference 13: Crank
Item 14: Plate allowing access to the mechanism
Reference 15: Mat base
Item 16: Locking screw
Item 17: Base fixing screw
Reference 18: Fixed mast pulley
Item 19: Cable clamp of the extension used to block
the cable
Item 20: Mast anchoring collar fixed by a screw and
containing 3 mooring eyelets
Item 21: Welding bead assembling the 2 tubes of the
the element
Reference 22: Eyelet for anchoring the first element attached
directly at the mast
Reference 23: Extension
Item 24: Force descent cable

Claims (9)

 1. - Telescopic mast composed of elements nesting into each other characterized in that the drive mechanism comprising a reel (rep. 11) with double effect for lifting or lowering in force in the event of seizure, is located in the base (ref. 15) and that only the upper element (ref. 7 fig. 2) is attached to it.  2. - Mast according to claim 1 characterized in that sue ltenrouleur (rep. It fig. 2) comprises a winch with manual or motorized control, double ce- 'cable, one used for raising the mast, the other winding in the opposite direction allows the elements to descend in force.  3. - Mast according to claim 1 or 2 characterized in that the lifting cable (rep. 1 fig. 1) passes through a small mast fixed in the base and passes around a movable pulley (rep. 18 fig. 1) fixed at the top of the 1st element (fig. 2 rep. 18).  4. - Mast according to any one of the preceding claims, characterized in that the 1st down cable (rep. 24) is free in the body of the mast.  5. - Mast according to any one of the preceding claims, characterized in that a rigid rod (rep. 23 fig. 4) is fixed to the base of the upper element, which will allow the latter to rise d 'an additional height corresponding to the length of this rod.  6. - Nàt according to any one of the preceding claims, characterized in that each element comprises guides (2-3 fig. 4) as well as a stop allowing the drive of the following element.  7. - According to any one of the preceding claims, characterized in that this mast can be manufactured in various materials or heavy alloys such as duralumin - aluminum - copper not annealed or plastic or with dnthèse resins.  8. - According to one of the preceding claims, it can be designed as a round tube - square or rectangular tube and other forms, for example hexegonal. For the different elements, a sliding section must be provided one inside the other.  9. - Mast according to any one of the preceding claims, characterized in that it is provided with a rapid locking system with handles allowing orientation, coupled with a safety blocking.