FR2573851A1 - RETRACTABLE DOOR AND ITS CONTROL MECHANISM FOR CLOSED FIREPLACE, IN PARTICULAR FIREPLACE FIREPLACE - Google Patents

Abstract

Movable door characterised in that its opening and retraction movement is brought about by pivoting about an axis parallel to its lower edge and by its translation under the bottom of the fire-place, the axis of pivoting being common to the plane of closing (3) and to the counterweight (9). This invention is of interest to heating apparatus manufacturers.

Description

The present invention relates to a retractable door and to its

  control mechanism for a closed fire whose main application is for glazed doors of closed fireplaces for chimneys of apartments or single-family houses. For reasons of atmosphere, closed fireplaces have a glazed front door pivotally mounted about a vertical axis at the

  way of building doors and windows.

  This way of opening, said to the French, has the following drawbacks:

opening, gradual opening.

  Some builders have built glass doors retractable vertically, called guillotine. These doors are plated in closing

  against frontal opening and disappear after

  slid vertically upwards along runners. The maneuver is facilitated by a counterweight connected to a pulley mechanism and to

cable.

  This drive mechanism, unsafe in its operation: derailment of the cable, parts warped by heat, does not provide assistance

that we can wait.

  In addition, it significantly increases the price of

  comes back from the set and access to the mechanism of com-

  and operation does not seem easy enough to allow maintenance and repairs

without disassembly.

  Moreover, the movement seems dangerous in the event of defection of a restraint

high position.

  The object of the invention is to remedy these drawbacks by providing a retractable door for use in closed fireplace hearths, a retractable door characterized in that it comprises a glazed plane tilting around a low horizontal axis.

  disposed in the vicinity of its lower and parallel edge

  leash to this one. The glazed plane emerges from the opening

  by tilting downwards around the horizontal axis

  zontal and is slid under the fireplace along tracks or sliding disposed on either side along the lower parts of the side walls of the fireplace with the assistance of counterweight pivotally mounted about the same axis of rotation as

that of the opening plan.

  The present invention has many advantages such as:

  few moving mechanical parts, due to

  have a low risk of seizure; 15. The control and operating mechanism is in a cold zone. It presents no risk of deformation by heat; safe rolling or sliding track avoiding stall during maneuvering 20. disassembly of window and mechanism

  very simple for cleaning and

  tenance; rear side of the glass easy to clean when lying down;

  25. return in the closed position ensured by the

  tower-stop at the end of the raceway;

  maneuver facilitated by the effect of the counterweight.

  counterweight and its axis madeon a monobloc assembly. The technical characteristics of the invention and other advantages will be apparent from the invention.

  reading of the following description made as a

  non-limiting example with reference to the accompanying drawing in which: /. FIG. 1 is a perspective view of a

  closed hearth fireplace equipped with

  Motable according to the invention; Figure 2 is a longitudinal vertical sectional view of a closed fireplace hearth retractable door according to the invention; 5. Figure 3 is a front vertical sectional view of a closed hearth chimney illustrating more particularly the control assembly and the raceways; Figure 4 is a schematic side view of a fireplace closed hearth in which the opening plane is assisted in guiding by additional means. FIG. 5 is a perspective view of a fireplace equipped with a retractable door with control

by rods and sliding sleeves.

  FIG. 6 is a detailed view of the mechanism

  control according to the variant of Figure 5.

  According to the invention, the fireplace closed hearth i front opening 2 comprises a pivoting closure plane 3 equipped with a window 4 for viewing the flames. This closing plane pivots in the vicinity of its lower edge 5 around a horizontal axis 6 down movable along the side walls

fireplace.

  The closure plane is pivotally mounted on this axis at a constant minimum distance thereof through a rigid spacer 7 in the form of a lever or arm provided on each side on each sides of the side walls of the

home.

  The axis 6 simultaneously constitutes the bearing axis of the carrier rollers 8 and the axis of

  pivoting of the door and its low counterweight

  9 at the end of an arm 10 secured to the rigid connection 7 forming its extension according to

  the variant shown in Figures 1 to 3.

  - 4 - The rollers 8 move each on and along the raceways 11, placed on either side in the vicinity of the lower edges of the hearth

and parallel to them.

  The races 11 each end with a stop before 12 and a rear stop 13. The front stop 12 is shaped back upwards at a right angle with progressive curvature according to the curvature of the rollers 8, so as to carry out a recall the glazed plane in the closed position and its immobilization in

  this position using the counterweight 9.

  The rear stop 13 is made for example also in the form of a return upward. Sealing is thus ensured and there is no need to provide in this position a closure

or additional sealing.

  The recall in this closed position is

  supplemented by the action of the counterweight 9.

  In the open position, when completely folded down, the closure plane slides along the tracks 11 under the fireplace, completely

retracted.

  In this position, the glazed plane occupies a storage position leaving completely free

the neighboring field of the opening.

  In order to perfect the guidance of the

  during its opening and trans-

  under the shelter, the complementary means

  represented in FIG. 4 have been imagined.

  With reference to FIG. 4, it is possible to guide the closure plane in its disengagement and tilting movement in the retracted position by a moving part 14 along the arm 10 of the counterweight 9 which will describe a path 15 of shape adapted printed or shaped in a room integral with the adjacent wall of the fireplace by a recessed or embossed profile representing the path of the path of the movable part 14 during the opening of the door and

its tilting under the focus.

  As a means -particulier one can choose a movable pin 16 slidably mounted along the arm 10 of the counterweight 9 whose axis carries a roller forced in displacement along a recessed race 17 formed in the adjacent wall of the fireplace or in an intermediate piece reported

on this wall.

  Of course, the same effects can be obtained by a wide variety of equivalent means:

  cams, tracks, sliding, rails ....

  Another embodiment for obtaining the same effects is shown in FIGS. And 6. In this variant, the side walls of the fireplace are each provided at the bottom of a fireplace.

  horizontal guide rod 18 along which

  smooth a sleeve 19 provided with a pivot pin 20.

  This lug serves as a common pivot axis

  21 for the connecting arm 22 with the door and its counterweight 23. A suitable stop before 24 and rear 25, for example in the form of bushings,

ends the device.

  In this way, the necessary combination of translational and rotational movements has been made on the same set by using only two simple parts. The counterweight 23 is carried by or advantageously shaped in the right extension 26 of the connecting arm 22 of the door with the spigot of

pivoting 21.

  Two embodiments of the invention have been described above, it being understood that various simple modifications, direct variants, substitutions by equivalent means, additions of means or equivalent elements and other changes without inventive contribution. enter perfectly

in its frame.

  Indeed, according to the general means of the invention, the pivoting of the plane of

  closing on the part allowing the translation, la-

  said counterweight piece 7-

Claims (9)

  1. Retractable door and its control mechanism for a closed hearth, in particular a closed hearth   chimney, characterized in that the pivot axis   (6) of the closure plane (3) is common to that of the door and the maneuvering counterweight and is carried by a movable part in translation along the walls of the fireplace to guide the door during its movement translationally to its retracted position parallel to a lateral face of the home.   2. Retractable door according to the claim   1 characterized in that the door in position es-   Camotée is placed under the fireplace.   Door according to claim 1,   in that the device realizing the movement   erase is composed of two sets   identical ones arranged at the bottom   one of the side walls of the fireplace.   4. Door according to claims 1, 2 and 3   characterized in that the axis of pivoting (6) is that of a roller (8) on which is mounted the closure plane (3) via a link (7) integral with the arm (10) d a tilting counterweight (9), said roller (8) moving on a raceway (11) along the side walls of the hearth.   5. Door according to claim 4,   characterized in that each race (11) is a flat iron provided with a front stop (12) and a rear stop (13) in the form of ends curved upwards.   Door according to claims 1 and 5   characterized in that the front stops (12) are formed at a right angle with a rounded angle of 8-   same curvature as that of the roller (8).   Door according to claims 1, 2 and 4   taken as a whole, characterized in that the door movement is guided by the cooperation of a moving part (14) along the arm (10) of the tilting counterweight (9) with a profile constituting the path forced (15) for this piece.   8. Door according to claim 7,   characterized in that the movable part (14) is a lug (16) slidably mounted on 1on9 of the arm (10) of the counterweight (9) carrying a roller co-operating with a recessed race (17).   9. Door according to claims 1, 2 and 3   taken as a whole, characterized in that the common pivot axis is a pin (20) carried by a sleeve sliding along a horizontal guide rod (18) provided with appropriate stops at its ends, the joint of the door on this axis being formed by the connecting arm (18) pivotally mounted on the pin, said arm continuing with a straight extension (26) bent upwards carrying the counterweight (23) or in which it is shaped.