GB2071758A

GB2071758A - Stop Device for a Pivotal Door, In Particular for an Automobile Vehicle Door

Info

Publication number: GB2071758A
Application number: GB8108330A
Authority: GB
Original assignee: Paumellerie Electrique SA
Current assignee: Paumellerie Electrique SA
Priority date: 1980-03-17
Filing date: 1981-03-17
Publication date: 1981-09-23
Also published as: FR2478177A2; FR2478177B2; DE3109553A1; GB2071758B; JPS56139376A

Abstract

In the door stop device, the arm (4) pivotally mounted at (7) on the door (3) is in the form of a flat strip which has respective edges against which are applied two rollers (12, 13) in an elastically yieldable manner. The first roller (12) is, in the open position of the door, engaged in a stop recess (9) of one of the edges of the arm and is fixed. The other roller (13) is rotatively mounted on a transverse portion (30) of a stirrup portion (32) which interconnects adjacent ends of two helical windings of a torsion spring (31). <IMAGE>

Description

SPECIFICATION Stop Device for a Pivotal Door, in Particular for an Automobile Vehicle Door The present invention relates to a stop device for a pivotal door comprising an arm adapted to be pivotally mounted, by means of a pin which is parallel to the pivot axis of the door, on one of the parts consisting of the door and the fixed post on which the door is mounted, said arm having the shape of a strip having two opposed edges against which edges there are applied two rollers which are mounted between parallel branches of a bracket member which is adapted to be fixed to the other part, one of said rollers being fixed and the other roller being movable and subject to an elastically yieldable torque which creates a pressure of contact between each of the two rollers and the arm, the arm being provided with a stop recess for retaining the fixed roller in the open position of the door, said elastically yieldable torque being produced by a torsion spring having a centre stirrup portion which interconnects adjacent ends of two helical windings which are symmetrically mounted on each side of the branches of the bracket member around extensions of a pin extending through the branches of the bracket member, which branches are part of a U-sectioned centre portion of the bracket member on each side of which are symmetrically formed two large wing portions which are perpendicular to the branches and have two spaced apart abutments against which bear the ends of the respective windings opposed to the branches, the transverse portion of the U being roughly perpendicular to the wing portions so that the pivotal arm engaged between the rollers can move while remaining spaced away from the transverse portion of the U.

In French patent No. 78 29 777 which describes such a door stop device, the movable roller is carried by a rocker against which the centre stirrup portion of the torsion spring bears and which is pivotally mounted on the pin extending through the branches of the bracket member.

An object of the invention is to provide a door stop device whose construction is simpler than that of said French patent.

The invention provides a device wherein the movable roller is rotatably mounted on the transverse portion of the centre stirrup portion of the torsion spring so that it is directly subjected to the elastically yieldable torque.

This arrangement not only makes an economy of the part formed by the rocker but also simplifies the bracket member in that the two branches of the latter may have a uniform spacing whereas in said patent the distance between the branches must be larger in the region in which the rocker is mounted than in the remaining part which receives the fixed roller.

The invention will be described in the ensuing description with reference to the accompanying drawing in which: Fig. 1 is a horizontal sectional view of a door stop device comprising a pivotal arm and two rollers bearing against the respective edges of the arm; Figs. 2, 3 and 4 are an end elevational, a plan and a side elevational view respectively of a bracket member carrying the two rollers and fixed to the fixed post with respect to which the door is pivotally mounted; Fig. 5 is a sectional view of a particular embodiment of the rollers, and Fig. 6 is a view similar to Fig. 1 of a modification of the invention in which the arm is pulled out of the fixed post when opening the door.

In these Figures, the invention is shown in its application to a vehicle door, but it will be clear that the stop device may be empioyed for other pivotal closing means of the vehicle, such as the bonnet of the engine, the luggage boot, a hatch door or the like, or, in other types of device, for example for lids of household apparatus, luggage cases, boxes or the like. The expression "door" is here employed in a very broad sense for designating these various pivotal closing means.

Fig. 1 represents a body post 1 on which the left front door 3 is pivotally mounted by means of hinges, the pin 2 of which extends through hinge members 5 respectively fixed on the post 1 and on the door 3. The latter is retained in the open position by a stop device which comprises an arm in the form of a flat strip 4 one of the ends of which is provided with an aperture 6 through which is engaged a pivot pin 7 which is parallel to the pin 2 and rigid with a bracket 8 fixed to the door 3. In the vicinity of this end, the arm 4 has on its front edge 4a a stop recess 9 in which is engageable, in the position corresponding to the end of the opening, a roller 12 carried by a bracket member 14 which is fixed by means of bolts 16 to one of the sheet metal parts 1 a constituting the post 1 through which the arm 4 extends.The front edge 4a of the arm is urged against the roller 12, which is fixed, by an opposing roller 13 which is also carried by the bracket member 14 and is elastically urged against the rear edge 4b of the arm 4.

The bracket member 14 has the general shape of a plate defined by two large planar wing portions 17 the shape of which is substantially that of a quadrilateral and which are applied against the sheet 1 a and are provided at 1 7a with apertures for the passage of fixing bolts 1 6. The two wing portions 1 7 extend symmetrically on each side of a centre U-shaped portion obtained by a folding operation and having two branches 1 8 which are perpendicular to the wing portions and are uniformly spaced from the piane of symmetry XX and serve to mount the two pins 19, 21, the pin 1 9 rotatively supporting the fixed roller 1 2 and the other pin 21 extending distinctly beyond the branches of the U and constituting two extensions 27 which extend in the region of the respective wing portions 1 7 and about which a helical winding 28 is engaged. This winding has a free end anchored against a flange 29 at a right angle to the corresponding wing portion 17, this end being part of a torsion spring 21 whose centre portion forms a stirrup 32 which interconnects the adjacent ends of the two windings. Rotatively mounted on the transverse portion 30 is the roller 13 which is thus directly subjected to the elastically yieldable torque produced by the spring 31.

The transverse portion 26 of the U-shaped centre portion 1 5 is roughly perpendicular to the wing portions 1 7 and is located in a marginal position relative to the wing portions so that the arm 4 is able to move between the branches 18 with no interference with the transverse portion 26 from which it is always spaced.

Under the action of the torque exerted by the transverse portion 30 of the spring 31, the two rollers 12 and 1 3 are applied with pressure against the edges 4a, 4b of the arm 4. In the closed position (not shown), the two rollers bear against a rectilinear part of the edges 4a, 4b so that the torque to be exerted to open the door is very low. Toward the end of the opening travel, the rollers 12, 1 3 must respectively pass over a boss having an angular profile 10 formed on the edge 4a and the region 11 having a convex curvature of the edge 4b, before the roller 12 finally drops into the stop recess 9 which retains the roller in a positive manner by means of its end side 9a as shown in Fig. 1.In order to close the door from this fully open position, a relatively large torque must be exerted against the retaining action exerted by the adjacent ramp 1 0a of the boss 10.

In the embodiment shown in Figs. 1 to 4, the rollers 12, 13 are solid rollers of conventional construction. Fig. 5 shows a modification of a roller 12 which results in appreciable advantages in the application to the door stop according to the invention. The roller 12 shown in Fig. 5 comprises two cylindrical rings 46, 47 of treated steel, each of which comprises at one end a planar flange 56, 57 extending radially outwardly.

The rings 46 and 47 are fitted one inside the other. The radial dimension of the flange 56 of the inner ring 46 is such that it extends beyond the cylindrical surface of the outer ring 47. The two rings consequently have a radially slidable contact between their adjacent cylindrical surfaces and an axially slidable contact between the flange-free end of the outer ring 47 and the flange 56 of the inner ring.A coating 58 of polytetrafluoroethylene, or some other material having a low coefficient of friction, is applied on the surface of the two rings 46, 47 so as to improve the sliding properties, not only between the two rings, but also between the inner ring 46 and pin 19 and between the flanges 56, 57 and, on one hand, the inner surfaces 1 8a, 1 8b of the branches 18 of the bracket member 14, and, on the other hand, the lateral surfaces 4c, 4d of the pivotal arm 4. It will be understood that the roller 13 may be identical to the roller 12 of Fig. 5.

In the described embodiment, the pin 7 pivotally mounting the arm 4 on the bracket 8 is disposed in such manner relative to the pivot pin 2 of the door 3 that, during the opening movement, the pin 7 moves toward the bracket member 14 so that the arm 4 is urged toward the fixed post 1 and enters the latter. The reverse arrangement is shown in Fig. 6 which corresponds to the case where the arm is drawn out of the fixed post during the opening movement.

In this case, the arm 40 has on its front edge 40a a stop recess 49 in the vicinity of its free end 42, i.e. at the end opposed to the pivot pin 7. This stop recess 49 is defined by a boss 41 having an angular profile, on one hand, and by the edge 49a of the forwardly curved end portion 42 on the arm 40 on the other hand. The rear edge 40b of the arm 40 is substantially rectilinear but terminates in a curved part 43 in the region of the end portion 42 which acts as a stop in the door opening direction.

The bracket member 14 is mounted inside the post 1 and, when the door is closed, the whole of the arm 40 is urged into this post, its rectilinear part being in contact with the rollers 12 and 13, as shown in dot-dash lines in Fig. 6. When the door is opened, the arm 40 slips between the two rollers 12 and 13 which must pass over the angular boss 41 before the roller 12 can drop into the recess 49 which retains it by means of its end side 49a in the same way as the recess 9.

It must be understood that the complementary parts or arrangements and modifications described in said French patent are applicable to the structure of the present invention. Thus the door stop, which has been illustrated in Fig.

1 as being independent of the hinge members 5, may be integrated in one of the hinges of the door; an auxiliary stop recess, corresponding to a partial opening of the door, may be provided on the arm 4 shown in Fig. 1 and on the arm 40 shown in Fig. 6; in both Fig. 1 and Fig. 6 the arms 4 and 40 may have such configuration that an elastically yieldable retention is created without the fixed roller 12 being fully engaged in the stop recess 9 or 49.

Claims

1. A stop device for a pivotal door, comprising an arm adapted to be pivotally mounted, by means of a pin parallel to the pivot pin of the door, on one of two parts consisting of the door and the fixed post on which the door is mounted, said arm having the shape of a strip having opposed edges against which edges are applied two rollers which are mounted between parallel branches of a bracket member which is adapted to be fixed to the other part of said two parts, one of the rollers being fixed and the other roller being movable and subjected to an elastically yieldable torque which creates a pressure of contact between each of the two rollers and the arm, the arm being provided with a stop recess for retaining the fixed roller in the open position of the door, the elastically yieldable torque being produced by a torsion spring comprising a centre stirrup portion interconnecting adjacent ends of two helical windings which are mounted symmetrically on each side of the branches of the bracket member about extension of a pin which extends through the branches of the bracket member, which branches are part of a U-sectioned centre portion of the bracket member on each side of which centre portion are symmetrically formed two large wing portions which are perpendicular to the branches and have two spaced-apart abutments against which abutments bear ends of the respective windings opposed to the branches, the U having a transverse portion which is roughly perpendicular to the wing portions so that the pivotal arm engaged between the rollers is capable of moving while remaining spaced away from the transverse portion of the U, wherein the movable roller is rotatively mounted on a transverse portion of the centre stirrup portion of the torsion spring so that it is directly subjected to the elastically yieldable torque.

2. A device according to claim 1, wherein the distance between the branches of the Usectioned centre portion of the bracket member is constant.

3. A device according to claim 1 or 2, wherein each roller comprises two cylindrical rings which are fitted one inside the other, each ring having at one end a planar flange extending radially outwardly of the ring, the flange of the inner ring having such radial dimension that it extends beyond the cylindrical surface of the outer ring so that the two rings have a sliding contact not only radially but also axially by abutment of the flange of the inner ring against the end of the outer ring remote from the flange of the outer ring.

4. a device according to claim 3, wherein the two rings are provided with a coating of a material having a low coefficient of friction.

5. A stop device for a pivotal door, substantially as hereinbefore described with reference to and as shown in Figs. 1 to 4 or Fig. 5 or Fig. 6 of the accompanying drawings.