ES1057726U - Improved strut for construction - Google Patents

Abstract

Improved strut for construction, which includes a lower tube, inside which telescopes an upper tube with pairs of facing holes where a pin is inserted that rests on a flange integral of an adjustment nut coupled in a threaded section located in the upper part of the lower tube, including means preventing the accidental separation of both tubes, the upper tube being adjusted to the internal diameter of the flange; characterized in that said means are determined from at least two lugs (11 and 12) integral with the upper tube (1), lugs that are at different heights and in different generatrices also within the lower tube (2); including the flange (7) on the edge of its inner diameter, a radial recess (13) corresponding to said lugs (11 and 12); all in order to avoid accidental separation of the tubes and also to be able to assemble and disassemble those tubes voluntarily. (Machine-translation by Google Translate, not legally binding)

Description

Strut perfected for construction.

Object of the invention

The present invention, as expressed in the set forth in this specification, refers to a prop perfected for construction intended to hold panels of formwork and other elements.

It is of the type that includes two tubes telescopically coupled by one of its extreme sections, while  that the free ends include widened bases for rest on the floor and to provide the seat of the panels formwork and the like.

The object of the invention are means for avoid accidental or involuntary separation of the tubes when No use is made of them. Other objects of the invention are also means to prevent the separation of the adjusting nut and keep it is always coupled to the entire threaded section of the bottom tube

Background of the invention

Construction struts come used for shoring in the works, to hold formwork panels, beams, etc. These struts are configured  usually by two telescopic tubes.

The upper tube has a series of holes arranged at a certain distance where a Barrette. In its upper part a plate is provided that is the which performs the corresponding support of the formwork panel, beam, or surface to prop up.

The lower tube also has a plate of  support at its lower end to perform support on the ground. At its opposite end it has a threaded area for the coupling of a nut with internal thread, which has some handles that facilitate the rotation of said nut and existing also in said nut a wall in its upper part.

The regulation and setting of the position of clamping is done through the nut where the pin that supports has been inserted into the corresponding hole in the tube higher.

In this type of props there is the problem of  separation between the upper tube and the lower telescopic tube leading to loss and breakdown problems, that is, when the strut has been removed from its shoring position, the Upper tube can be separated from the lower tube.

To avoid these inconveniences are planned means that prevent separation between both tubes telescopic

Thus, for example, in Invention Patent No. P-9700061 a spring piece is planned mounted internally on the lower tubular element, being endowed said two-arm piece with extreme expansions that protrude through diametrically opposite openings of the lower tubular element and exerting a stop action against the upper wall fixed to the adjusting nut.

Also, in the French Utility Certificate No. 7221681 a similar system is planned and in this case the stopper on the upper wall of the adjusting nut it is done by an interlocking latch protruding from the tube inside through the corresponding spring.

Utility Model No. U-200400794 refers to a strut comprising also two telescopically coupled tubes where the upper tube it has in the lower part a flare adjusted to the inside diameter of the lower tube; also including a retention element solidarity of the adjusting nut, retaining element where adjust the outer diameter of the upper tube, while over said element will stop the flaring to avoid the separation of the tubes

This provision described in the previous paragraph it presents some problems in construction and also in mounting.

Description of the invention

In order to achieve the objectives and avoid  drawbacks mentioned in the previous sections, the invention proposes a strut that in principle comprises a tube upper telescopically coupled into a lower tube that it has at its free end a base of support on the ground, while that the free end of the upper tube also includes another base of support of the surface to be propped up, such as panels of formwork

The upper tube has pairs of holes facing where a pin is inserted to adjust the height of the prop. However, to adjust that height precisely there is a nut with handles attached to a threaded end section upper tube lower. This nut has a wall where the upper tube fits, while on said wall Support the cited pin.

It includes means to prevent separation accidental of the two tubes that are characterized because they comprise at least two solitary lugs of the upper tube arranged to different heights, while they are in different tube generatrices; essentially located on paths diametrically opposite generatrices.

These lugs are complemented by a small radial open recess of the integral wall of the nut adjustment, said fence being the one that prevents accidental exit of the upper tube with respect to the lower one, when stopping one of said busty in walloon bliss. This recess is arranged in  correspondence with the edge of the inside diameter of the Walloon

To assemble, you first enter one of the lugs (closest to the corresponding free end of the upper tube) on said recess; then turn until match the second stud in said open recess.

To perform a voluntary disassembly, will proceed in the same way, although first introducing the busty furthest from the free end of the upper tube and then the most next, previously rotating the said tube.

Another feature of the invention are means to prevent displacement of the adjusting nut to a position in which the coupling between nut and bottom tube only be associated by a small threaded section. To do this, the nut incorporates inferiorly a protruding element that when turning said upward nut, said protruding element you will trip over the bottom edge of the bottom tube thread where The adjusting nut is attached. Said thread protrudes with with respect to the outer diameter of the lower tube.

Next to facilitate a better understanding of this descriptive report and being an integral part of it are accompanied by figures that represent the object of the invention.

Brief description of the drawings

Figure 1.- Shows a sectioned elevation view of the strut perfected for construction, object of the invention.

Figure 2.- Shows a plan view of the strut.

Description of the preferred embodiment

Considering the numbering adopted in the figures, the strut perfected for construction is constituted to from an upper tube 1 telescopically coupled within a second lower tube 2, counting this one at its free end with a support base 3 on the ground, as with the tube upper 1 that includes another base 4 at its free end.

The upper tube 1 incorporates several pairs of facing holes 5 where a pin 6 to regulate the height of the strut. To do this, this pin 6 will rest on a wall 7 integral with a nut adjustment 8 coupled to an outstanding threaded section 9 located in the higher part of the lower tube 2. The nut 8 includes some handles 10 that facilitate its rotation to refine the height of the strut. The outer diameter of upper tube 1 conforms to diameter inside the wall 7.

\hbox{inferior 2.}

The lower part of the upper tube 1 includes two opposite lugs 11 and 12 at different heights that are located inside the lower tube 2, so that the distance between them according to a plan view corresponds to a diametral distance approximately coinciding with the inside diameter of the tube

 \ hbox {lower 2.} 

Thanks to these teats 11 and 12, when moving relatively both tubes in axial direction, in principle the brass upper 11 furthest from the end of the upper tube 1 will trip with Walloon 7, thus avoiding accidental separation of said tubes 1 and 2.

On the other hand, Walloon 7 includes a small radial recess 13 located at the edge of the inner diameter of said wall 7, said recess being intended for to be able to mount the two tubes and also to be able to disassemble them voluntarily. To do this, they will coincide independently the breasts with said radial recess, first a busty and then the other, previously performing the required turn.

The adjusting nut 8 incorporates in its edge bottom a protruding portion 14, such as a screw, rivet or similar, so that when that nut is turned in the direction ascending, there will come a time when said outgoing portion 14 butt against the bottom edge of the threaded section 9. Of this form ensures that strut efforts will be supported always for the entire threaded section 9 and not just for one part of it.

Claims (2)

1. Strut perfected for construction, which includes a lower tube, inside which an upper tube with pairs of facing holes is telescopically coupled where a pin is inserted that rests on a joint wall of an adjusting nut coupled in a threaded section located in the highest part of the lower tube, including means that prevent accidental separation of both tubes, the upper tube being adjusted to the inner diameter of the wall; characterized in that these means are determined from at least two lugs (11 and 12) integral with the upper tube (1), lugs that are at different heights and also in different generatrices within the lower tube (2); including the wall (7) at the edge of its inner diameter, a radial recess (13) corresponding to said lugs (11 and 12); all in order to avoid accidental separation of the tubes and also to be able to mount and disassemble those tubes voluntarily. 2. Strut perfected for construction, according to claim 1, characterized in that it incorporates means that limit an extreme upper position of the adjusting nut (8), means consisting of a protruding portion (14) towards the integral interior of the lower edge of the adjusting nut (8), a portion that is complemented by the lower edge of the highlighted upper threaded section (9) of the lower tube (2), abutting the projecting portion (14) on said lower edge of the highlighted threaded section (9) in the highest position of the adjusting nut (8).