DOUBLE CANVAS DOOR

Abstract

The invention relates a double-canvas door; comprising a frame (1) provided with guides (2a, 2b) for moving the canvases (3a, 3b) between door open and closed positions, said canvases defining an intermediate chamber (8) therebetween. The door comprises a single motor-driven roller (6) for the simultaneous winding of both canvases, and a single motor (61) for actuating the roller, the upper ends of the canvases (3a, 3b) being connected to one another and to a band (5) coupled to the winding roller (6), said connection closing the upper end of the intermediate chamber (8) when the door is closed.

Claims

1. A double-canvas door; comprising a frame (1) provided with guides (2a, 2b) for moving two canvases (3a, 3b) between door open and closed positions, with said canvases defining an intermediate chamber (8) therebetween; characterised in that it comprises a single motor-driven roller (6) for the simultaneous winding of both canvases, and a single motor (61) for actuating the roller; with the upper ends of the canvases (3a, 3b) being connected to one another and to a band (5) coupled to the winding roller (6); with said connection closing the upper end of the intermediate chamber (8) when the door is closed.

2. A door, according to claim 1 characterised in that the upper ends are connected to one another and to the band coupled to the winding roller by a connection profile (4) that has several parallel slots (41) to secure the upper end of the two canvases (3a, 3b) and a first end of the band coupled to the winding roller (5).

3. A door; according to claim 2, characterised in that the winding roller comprises: a first longitudinal slot (62) to secure a second end of the band coupled to the winding roller (5), and a second longitudinal slot (63) that holds the connection profile (4) when the band coupled to the winding roller (5) and canvases (3a, 3b) are wound on the roller (6).

4. A door, according to any of the previous claims: characterised in that it comprises a centring profile (11) for the canvases (3a, 3b) between the upper end of the guides (2a, 2b).

Description

DESCRIPTION OF THE FIGURES

[0015] To complement the description that is being provided and in order to provide a better understanding of the characteristics of the invention, a set of drawings is included along with this descriptive summary, in which the following elements have been represented for the purposes of illustration but not limitation:

[0016] FIG. 1 shows a front elevation of an exemplary embodiment of the double-canvas door according to the invention, in the closed position.

[0017] FIG. 2 shows a profile view of the double-canvas door in the previous figure cut by a vertical plane, and a detailed close-up view of an upper portion of the door.

[0018] FIG. 3 shows a plan view from above of the double-canvas door in FIG. 1 cut by a horizontal plane.

[0019] FIG. 4 shows a close up profile view of an upper portion of the door, which shows the canvases in the open position, and a detailed close-up view of the roller, which shows the connection profile of the canvases and the band, fit into the second longitudinal slot of the shaft.

PREFERRED EMBODIMENT OF THE INVENTION

[0020] As observed in FIGS. 1 to 3, this double-canvas door comprises a frame (1) provided on each side with a pair of guides (2a, 2b) for moving the canvases (3a, 3b) fitted at the lower ends with tension weights (31) and connected to one another at the upper end by a connection profile (4) to a band (5) coupled to a single winding roller (6) actuated by a drive set (61) such that when the winding roller rotates in one direction or the other, the two canvases (3a, 3b) simultaneously wind or unwind on the roller (6) and consequently open or close the door. The upper part of the door is equipped with a cover (7).

[0021] As shown in FIGS. 2 and 3, the canvases (3a, 3b) create an intermediate chamber (8) therebetween, which is equipped on the sides with a series of blower nozzles (9) connected by a series of conduits (91) to a heating set (10) responsible for blowing temperature-controlled air into said intermediate space.

[0022] As shown in the detailed close-up in FIG. 2 and FIG. 4, the door comprises a centring profile (11) for the canvases (3a, 3b) between the upper end of the guides (2a, 2b).

[0023] As shown in the detailed views of FIGS. 2 and 4, the connection profile (3), in this case with a triangular-shaped general cross-section has several parallel slots (41) to secure the upper end of the two canvases (3a, 3b) and a first end of the band coupled to the winding roller (5).

[0024] In this exemplary embodiment, the canvases (3a, 3b) and the band coupled to the winding roller (5) are secured to the connection profile in a known manner by inserting a series of thicknesses in the canvases (3a, 3b) into the slots (41) and into the band coupled to the winding roller (5) created with the respective round beads.

[0025] The winding roller comprises a first longitudinal slot (62) to secure a second end of the band coupled to the winding roller (5), and a second longitudinal slot (63) that holds the connection profile (4) when the canvases (3a, 3b) are wound on the roller (6) as shown in FIG. 4.

[0026] In this wound position, the connection profile (4) and the connection zones between it and the canvases (3a, 3b) and the band coupled to the winding roller (5) are recessed with respect to the general cylindrical surface area of the winding roller, avoiding any bumps that could cause marks or deformation of the canvases (3a, 3b).

[0027] As shown in the detailed view of FIG. 2, the connection of the upper end of the canvases (3a, 3b) to the connection profile (4) closes the top of the intermediate chamber (8), which helps maintain the existing temperature conditions in the atmosphere of said intermediate chamber (8).

[0028] Having sufficiently described the nature of the invention, as well as a preferred embodiment, it is hereby stated for the pertinent purposes that the materials, shape, size, and arrangement of the described elements may be modified, provided that this does not alter the essential characteristics of the invention that is claimed below.