GB1568326A

GB1568326A - Door stay device

Info

Publication number: GB1568326A
Application number: GB508/78A
Authority: GB
Original assignee: ED Scharwachter GmbH and Co KG
Current assignee: ED Scharwachter GmbH and Co KG
Priority date: 1977-01-24
Filing date: 1978-01-06
Publication date: 1980-05-29
Also published as: DE2702731C2; FR2378161A1; FR2378161B1; IT7819533A0; DE2702731A1; IT1092021B

Description

(54) A DOOR STAY DEVICE (71) We, ED. SCHARWACHTER G.m.b.H.

& Co. K.G., a company organised under the laws of the Federal Republic of Germany of 5630 Remsheid 1, Germany, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to a door stay device, particularly for the door of an automobile.

According to the present invention there is provided a door stay device for automobile doors, comprising a door stay bar passing through a housing accommodating two braking rollers engaging the major faces of the stay bar, the braking rollers being seated throughout the greater part of their peripheral surfaces in mountings bearing by way of resilient means against wall sur- faces of the housing at an angle to the direction of movement of the door stay bar through the housing.

The rollers are pressed against the stay bar and, in known manner, restrain it from moving out of a selected position in which it has been set and corresponding, for example, to a fully or partly open position of the door. Accordingly, the stay bar may have each of its major surfaces formed with one or more bulges, indentations, or other formations for co-operation with the rollers.

The mountings may be cage like and moulded or extruded from plastics material. Thus each mounting may be in the form of a block having a cylindrical crosssection substantially equal in diameter to the roller supported by it. The axis of the groove is located within the block but at a distance from a surface thereof less than the radius of the groove. The roller thereby projects from the open side of the groove and is presented to the stay bar. Assembly is facilitated if the groove runs from end to end of the block, so that the roller may be inserted into the groove from one end, or in some other way. The mountings may be identical and formed from a suitable plastics for example a polyamide, Delrin (Trade Mark\ or similar plastics. The rollers are held captive within the mountings and these assemblies may be stored in quantity.

The housing may have a domed or dished body with an end wall and a peripheral side wall, or side walls, the cavity within the body being closed by a cover conveniently in the form of a cover plate. Both the end wall and the cover are provided with aligned slots through which the stay bar passes.

The body and cover parts of the housing may have projecting superimposed portions or flanges which are secured together after insertion of the mountings (incorporating the rollers) and the resilient means. The reaction to the mountings, is taken by the cover and by the side wall or walls inclined obliquely to the plane of movement of the stay bar.

With this construction, the device may be made and installed cheaply.

The rollers will rotate relatively noise- lessly, and the unprofiled portions of the stay bar will pass relatively noisetessly through the housing.

The mountings may possess surfaces extending parallel to the plane of movement of the door stay bar, and facing the bar, and fillet or string-like projections which partially overlap each side of the door stay and its normal thickness of material, so that the mountings at least partially fit around the door stay bar.

In the housing, the mountings for the braking rollers may bear, considered in one direction of movement of the door stay bar X ia their one longitudinal narrow side against the housing and wall and in the other direction of movement of the door stay bar elastically against the cover with the result that in the one direction of movement of the door stay bar appreciably higher braking and retaining forces can be applied than in the other direction of movement of the door stay bar sothat high braking forces are applied for example only in the direction of closure.For the resiliently elastic support of the mountings inside the housing, either metallic springs or cushions or mouldings of rubber elastic material may be used, the use of mouldings of resilient elastic material offering particularly the advantage that the means for resiliently elastically supporting the mountings of the braking rollers can be pushed or clipped in together with the mountings before the mounting is assembled.

From the detail design aspects, the invention can be realised in the most varied manner.

According to a first embodiment of the invention, the mountings possess a substantially rectangular cross-sectional shape and are each supported by an adapter or support piece of substantially L-shaped cross-section of resiliently, elastic material, especially rubber or elastomer, against the inclined side walls and cover of the housing, whereas they bear with their free longitudinal narrow edges directly against the end wall of the housing.

According to another embodiment of the invention, the mountings extending substantially over the entire height of the housing and are furnished on their rear faces with dovetail-shaped longitudinal recesses into which correspondingly inclined, strip-shaped members of an adapter or support piece of resiliently elastic material can engage, the adapter pieces of resiliently elastic material being so shaped that they bear on the other side against the inclined side walls of the housing and partially also against the cover of the housing.

According to a further embodiment of the invention, the mountings of the braking rollers possess a substantially diamondshaped cross-section and bear, on the one hand via a section edge rounded to a suitable radius, against the curved transition region between the side walls and end wall of the arrester housing and, on the other hand via their opposite section face which is inclined to the plane of movement of the door stay bar against a cushion of substantially wedge-shaped cross-section of resiliently elastic material, which in turn bears against the surface of the cover of the housing.

Finally, the mountings may be formed as guide- blocks and, while corresponding to the frusto-conical internal cross-sectional contour of the housing, are of shorter dimension than this housing and are supported by means of springs, especially helical springs against the cover of the housing. The springs engage with advantage in recesses or seatings formed in the guide block type mountings on the side nearest to the cover.

Independently, of the particular embodi ment of the constructional details of the door stay device according to the present invention, provision may be made for at least one of all mutually sliding surfaces to be coated with a facing of low-friction material, whereby the facing may be of lowfriction lacquer, Teflon (Trade Mark) or other foil coating. In particular, provision is made for the stay bar and/or the housing walls to be coated or faced with a facing of low-friction material.

The invention will now be described by way of example with reference to the accompanying drawings, in which : Figure 1 is a longitudinal section through one embodiment of a door stay device in accordance with this invention; Figure 2 is a section through the device shown in Figure 1 taken on the line II-II; Figure 3 is a longitudinal section through another embodiment of the invention; Figure 4 is a longitudinal section through a further embodiment of this invention; Figure 5 is a longitudinal section through a still further embodiment of this invention.

Referring to the drawing the door stay device, in accordance with all the embodiments illustrated, includes a door stay bar 2 of rectangular cross-section having a bulge 1 on each major surface. The stay bar is pivoted to a door post, not shown in the drawing, about an axis parallel to the axis of the hinge attaching the door to the door post. The stay bar 2 passes through a housing designated generally 3, fixed to a door body also not shown. The housing has a domed or pot-shaped body 4, the interior of which is covered by a plate 5. The body and cover plate have flanges or projections 7 and 6 respectively, held together by bent over lugs 8 projecting from the flanges 6.

The cover plate has a slot 9 in line with a slot 10 in the crown or end wall 11 of the body, the stay bar passing through the two slots. Fitted within the housing are mountings 13 of plastics material each of which presents a brake roller 12 for contact with a respective major face of the stay bar.

In the embodiment shown in Figures I and 2 each of the mountings 13 has a substantially rectangular cross-section with a planar lateral face 15 formed circular crosssectioned channel 22 receiving the roller.

The mountings are held in alignment with the faces 15 facing and parallel to the stay bar. Each of the mountings has two strip or fillet-like projections having a thickness of about half that of the stay bar, so that the strips of both mountings abut, whereby the mountings define a rectangular sectioned cavity through which the stay bar passes.

Seated within the housing, one on each side of the stay bar, are two support pieces 20 of resilient plastics material, each of Lshaped cross-section. The support pieces conform in shape to the side walls of the body and support the mountings 13. Each mounting therefore has a narrow longitudinal face 17 which bears against the end wall 11 of the body a narrow face 19 op posite thereto which bears against the narrower limb of the support piece (and thereby indirectly against the cover plate 5) and a broader face 18 which bears against the wider limb of the support piece (and thereby indirectly, against the side wall of the body.) Each of the channels 22 has its axis spaced from the face 15 by a distance greater than its radius, so that the roller is embraced by the channel wall through the greater part of the roller periphery.The channels are open ended to enable the rollers to be pushed lengthwise into them.

The mountings with rollers in situ may be stored as pre-assembled units. The assembly of a door stay device in accordance with the present invention is thus extraordinarily simple to assemble, since it is only necessary to introduce into the housing body, successively, the mountings already furnished with the braking rollers 12 and the support pieces 20 of resiliently elastic material, before the cover plate 5 is applied.

In the embodiment illustrated in Figure 3, the rear faces of the mountings 13a have dove-tail shaped recesses 23, into which complementary strip-shaped projections 24 of support pieces 2Oa of resiliently elastic material engage. This shape permits preassembly to be taken one step further, since the support pieces of resiliently elastic material can be clipped onto the mountings themselves already furnished with the braking rollers 12, and the entire unit stored.

The mountings, braking rollers and resiliently elastic supports can be introduced into the body as one unit, before the cover plate is applied. In the embodiment shown in Figure 4, each of the mountings 13b has substantially diamond-shaped cross-section, one edge 24 of which is rounded to home a radius corresponding to the contour of the arc-shaped transition region 25 between the end and side walls 21 of the body.

Contact between the mountings and the housing is concentrated solely along these edges. The face 26 of each mounting, opposite the edge 24, is oriented obliquely to the plane of the door stay bar 2 bearing against a respective support piece 27, having a generally wedge-shaped cross-section, and made of resiliently elastic material. The support pieces 27 in turn bear against the inner face of the cover plate.

In the embodiment shown in Figure 5 the mountings 13c and are movably disposed in the housing 3. The mountings correspond in shape to the frusto-conical internal cross-sectional contour of the body 3, but are shorter than the body. The mountings bear, by way of springs 28 against the cover plate 5. The springs 28 engage in recesses or seatings 29, which are formed in the surfaces 30 of the mountings 13c facing the cover plate and oriented transversely to the plane of the door stay bar 2. In this embodiment the internal surfaces of the body walls 11, 21 are coated with a facing 31 of low-friction material.

This may be constituted by a low-friction lacquer coating or a foil lining. In a similar manner, the stay bar 2 is also furnished with a coating of low-friction material 32.

The use of a coating of low-friction material is not limited to the embodiment according to Figure 5, but can be employed in any of the other embodiments of the dodr stay device, especially those according to Figures 1 to 4.

WHAT WE CLAIM IS:- 1. A door stay device for automobile doors comprising a door stay bar passing through a housing accommodating two braking rollers engaging the major faces of the stay bar, the braking rollers being seated throughout the greater part of their peripheral surfaces in mountings bearing by way of resilient means against wall surfaces of the housing at an angle to the direction of movement of the door stay bar through the housing.

2. A door stay device according to Claim 1 wherein each of the mountings is made in one piece from a plastics material and has extending therethrough a partcylindrical channel opening to a face of the mounting, the peripheral surface of the roller housed by the mounting projecting through said face.

3. A door stay device according to Claim 1 or 2 wherein each mounting has a face parallel to and facing towards the stay bar, said surface being formed on each side of the door stay bar with fillets or sttip like projections.

4. A door stay device according to any of Claims 1 to 3 wherein the mountings bear against that wall of the housing through what the stay bar passes and, by way of said resilient means, against a cover facing the said wall and also traversed by the stay bar.

5. A door stay device according to any preceding claim, wherein each mounting has a substantially rectangular cross-section and bear, via an adaptor or support piece having a substantially L-shaped cross-section and of resiliently elastic material, especially rubber or elastomer, against an inclined side wall and a cover of the housing.

6. A door stay device according to any of Claims 1 to 4, wherein each mounting has a substantially rectangular cross-section, one face thereof being formed with a generally dovetail-shaped longitudinal recess into which correspondingly inclined strip-shaped

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. wall 11 of the body a narrow face 19 op posite thereto which bears against the narrower limb of the support piece (and thereby indirectly against the cover plate 5) and a broader face 18 which bears against the wider limb of the support piece (and thereby indirectly, against the side wall of the body.) Each of the channels 22 has its axis spaced from the face 15 by a distance greater than its radius, so that the roller is embraced by the channel wall through the greater part of the roller periphery. The channels are open ended to enable the rollers to be pushed lengthwise into them. The mountings with rollers in situ may be stored as pre-assembled units. The assembly of a door stay device in accordance with the present invention is thus extraordinarily simple to assemble, since it is only necessary to introduce into the housing body, successively, the mountings already furnished with the braking rollers 12 and the support pieces 20 of resiliently elastic material, before the cover plate 5 is applied. In the embodiment illustrated in Figure 3, the rear faces of the mountings 13a have dove-tail shaped recesses 23, into which complementary strip-shaped projections 24 of support pieces 2Oa of resiliently elastic material engage. This shape permits preassembly to be taken one step further, since the support pieces of resiliently elastic material can be clipped onto the mountings themselves already furnished with the braking rollers 12, and the entire unit stored. The mountings, braking rollers and resiliently elastic supports can be introduced into the body as one unit, before the cover plate is applied. In the embodiment shown in Figure 4, each of the mountings 13b has substantially diamond-shaped cross-section, one edge 24 of which is rounded to home a radius corresponding to the contour of the arc-shaped transition region 25 between the end and side walls 21 of the body. Contact between the mountings and the housing is concentrated solely along these edges. The face 26 of each mounting, opposite the edge 24, is oriented obliquely to the plane of the door stay bar 2 bearing against a respective support piece 27, having a generally wedge-shaped cross-section, and made of resiliently elastic material. The support pieces 27 in turn bear against the inner face of the cover plate. In the embodiment shown in Figure 5 the mountings 13c and are movably disposed in the housing 3. The mountings correspond in shape to the frusto-conical internal cross-sectional contour of the body 3, but are shorter than the body. The mountings bear, by way of springs 28 against the cover plate 5. The springs 28 engage in recesses or seatings 29, which are formed in the surfaces 30 of the mountings 13c facing the cover plate and oriented transversely to the plane of the door stay bar 2. In this embodiment the internal surfaces of the body walls 11, 21 are coated with a facing 31 of low-friction material. This may be constituted by a low-friction lacquer coating or a foil lining. In a similar manner, the stay bar 2 is also furnished with a coating of low-friction material 32. The use of a coating of low-friction material is not limited to the embodiment according to Figure 5, but can be employed in any of the other embodiments of the dodr stay device, especially those according to Figures 1 to 4. WHAT WE CLAIM IS:-

1. A door stay device for automobile doors comprising a door stay bar passing through a housing accommodating two braking rollers engaging the major faces of the stay bar, the braking rollers being seated throughout the greater part of their peripheral surfaces in mountings bearing by way of resilient means against wall surfaces of the housing at an angle to the direction of movement of the door stay bar through the housing.

sliders of adaptor or support pieces of resiliently elastic material can be engaged.

7. A door stay device according to any of Claims 1 to 4, wherein each mounting has a substantially diamond-shaped crosssection with a rounded edge which bears against the arcuate transition region between a side and end wall of the housing, the face of the mounting opposite said rounded edge being inclined obliquely to the plane of the door holding rod and bearing against a cushion having a generally wedge-shaped cross-section and being formed of resiliently elastic material, the cushion bearing against a cover of the housing.

8. A door stay device according to any of Claims 1 to 4, wherein each mounting is formed as a guide block shaped to correspond to the frusto-conical internal crosssectional contour of the housing but being shorter than the latter, a spring being interposed between the mounting and a cover for the housing, the spring engaging a seating or recess in the transverse surface of the mounting nearest to the cover.

9. A door stay device according to any one or more of the preceding claims, wherein at least one of all mutually sliding and co-operating surfaces of the device is coated with a facing of low-friction material, especially low-friction lacquer or teflon.

10. A door stay according to Claim 9 wherein the low-friction coating is formed by a foil coating.

11. A door stay according to either of Claims 9 and 10, wherein the stay bar is coated with a facing of low-friction material and the lateral walls of the housing are also coated with a facing of low-friction material.

12. A door stay device for automobile doors, comprising a door stay bar and a housing including a domed body having side walls and an end wall and a cover applied to the housing opposite to the end wall, the cover and the end wall being formed with slots through which passes the stay bar, the stay bar being engaged by braking rollers each supported throughout the major part of its circumference in a respective plastics mounting which bears indirectly through the intermediary of a resilient support against a wall or the cover of the housing at an angle to the direction of movement and the stay bar through the housing.

13. A door stay device for automobile doors, comprising a door- stay bar for pivotal attachment to a door post, the stay bar having at least one bulge on each of its major surfaces, and a housing attachable to the door and accommodating two braking rollers engaging said major surfaces, each roller being seated throughout the greater part of its peripheral surface in a cage-like mounting which bears through resiliently elastic means against a side wall surface of the housing inclined obliquely to the plane of movement of the door stay bar and against a cover of the housing.

14. A door stay device substantially as hereinbefore described with reference to and as illustrated in any of the figures of the accompanying drawings.