FR2595904A1 - Tension equalising and distributing device for covering film for greenhouses - Google Patents

Abstract

The device consists of the combination of the positionings of the lateral 14, 15 and the upper 9 axial tensioning elements, the latter being known as ridge elements, which by continuous mechanical effect distribute over the surfaces auto-equalising tractions. It is intended to equip more particularly vaulted greenhouses in order to ensure not only the distribution of the tension over all the covering surfaces but also the continuous take-up of any relaxation.

Description

 The object of the invention relates to a balancing and voltage distributor device for greenhouses covering film.

 It is intended to equip more particularly the chapel greenhouses in order to ensure not only the distribution of the tension on all the covering surfaces, but also the continuous catching up of any loosening.

 In known devices, tensioners were used with traction action at a determined point acting on the entire surface, which led to overvoltages in reduced sectors, most often causing tears, given the undistributed resistances.

 The device according to the invention eliminates these drawbacks and makes it possible, as a result of a functional distribution, to ensure a perfectly balanced tension on all of the surfaces with continuous traction ensuring a flexible mechanical non-tearing take-up of all the covering surfaces.

 It is constituted by the combination of the positioning of the upper axial tensioning elements called ridge and side which by continuous mechanical effect distribute the surfaces of the self-balancing pulls.

In the accompanying drawings, given by way of nonlimiting example, of one of the embodiments of the subject of the invention
Figure 1 is an elevational view of the entire device.

 Figures 2, 3 are elevational and sectional views of the upper tensioner.

 Figure 4 shows the assembly of the upper tensioning sectors.

 Figure 5 shows a sectional view of the side tensioners.

 Figure ó shows the chapel greenhouses with pressure balancing tensioners seen in perspective.

 The edges 1, 2 and others, fig 1 to 6, receive at their upper part a flange 3 carrying a fixed vertical rod 4.

 On this rod moves a slide or tubular element 5 integral with the ridge support 6.

 This ridge support 6 is tubular and is provided at one of its ends with a male assembly stud 7 which enters the receiving recess 8 of the other ridge element.

 A continuous interlocking is carried out over the entire length 9, 10, (fig 6).

 This sleeve positioned on an outer spring 11 of greater length and which rests on the flange 3.

I1 realizes a spacer with elasticity sector, arrow
A, B, stretching the film 12.

 The flange can be a cross welded to the hoop or by a support rod 13 (fig 4) on which the flange 3 is fixed, on which the assembly is mounted, rod 4, slide 5 and spring 11.

 The lateral tensioners 14, 15, (fig 1, 5, 6) are formed by a flexible steel rod 1o provided with a hooking sector with elastic profile 17 penetrating into the positioning orifice 18 formed in the tubular arch 1.

 Its opposite end forms a ring 19 receiving the juxtaposable tubular elements 20 forming the continuous lateral tension bars 20, 21, 22, 23, (fig 6).

 The film 12 immobilized at point 24, 25 by any suitable and tensioned device, facilitates continuous pushing, arrow C which stretches it perpendicularly in the axis of the overlap.

 The lateral tensioners (fig 1, 5, 6) undergoing the tension push, arrow D, carry out a push, arrow E, which automatically tightens the film 12.

 There are then three continuous mechanical tension sectors which regularize the covering surfaces by catching up with relaxation, contractions or distensions.

 Wind and weather resistance is improved and the risk of tearing or tearing reduced.

 This result is obtained by the upper coil spring 11 and the flexibility of the steel rod 16 anchored on the hoop 1.

 However, the shapes, dimensions and arrangements of the different elements may vary within the limit of the equivalents, besides the materials used for their manufacture, without changing the general conception of the invention which has just been described.

Claims (2)

 10 Balancing and tension distributor device for covering greenhouses intended to equip chapel greenhouses more particularly in order to ensure not only the distribution of tension on all covering surfaces, but also the continuous recovery of any loosening, characterized by the combination of the positioning of the upper (9, 10) and lateral (20, 21, 22, 23) tensioners provided that the upper hoop tensioners (1) are formed by a support flange (3) fixed in the upper axis of the hoops (1) supporting a fixed vertical rod (4) on which slides a sleeve (5) integral with the ridge support (6) and positioning a coil spring (11) of greater length and having its fixed point on the flange (3 ) while the lateral tensioners (20, 21, 22, 23) consist of a flexible steel rod (16) provided at one of its ends with a hooking profile (17) forming a sector of elasticity, immobilized in a perforation (it)) pra ticked on the upper face of the hanger (1 and its opposite end supports a ring (19) receiving the tubular bars (20) producing continuous tensioners over the entire length of the greenhouse.  20 Device according to claim 1, characterized in that the ridge support is formed by tubular elements (6) carrying a connection end piece (7) fitting into the receiving recess (8) of the juxtaposed rod so as to form a continuous vertical tension bar over the entire length of the greenhouse; the wire (12) being fixed by its ends (24, 25).