ELEMENT FOR THE DEFINITION OF A SCREWING PROCEDURE BY A HOLE

MEMBER DEFINING A THROUGHGOING SCREW CONNECTION

The present invention relates to a member defining a screwing through hole. The invention relates more particularly to a screw hole comprising a first end with a sunk surface corresponding coaxial to said hole and a second end ending, said hole being adapted to receive a screw.

A known conventional screw hole as previously described and for enabling the attachment of a part on a support. However, when the hole is not visible or is not easily accessible and especially when it is recessed from the outer surface of a carrier, it is difficult for the operator to quickly bring the screw into the screw hole and conducting a screwing. In effect, the operator manipulates the screw can contact several times with the counterbore before locating the hole and engage the screw. This gives rise to a non-negligible time loss on an assembly line, for example. Furthermore, a further disadvantage non-negligible in the case where the screw hole is set back is the fact that the workpiece becomes undetachable when secured to a structure.

The invention aims to overcome the drawbacks by proposing a support defining a screw hole improved.

To this end, a first object of the invention is to provide a member defining a screwing through hole adapted to receive a screw including a first end with a sunk surface corresponding coaxial to said hole and a second opening end characterized in that said sunk surface comprises an indentation in the direction of insertion of the screw, said notch having an inclined slope defined as the slope is upward from the first end of the bore screwing so as to constitute a guide when positioning the screw in said hole.

An advantage of the present invention is that the operator can position the screw blindly and therefore be faster when mounting the workpiece on a support.

According to a first embodiment of the invention, the notch may have a transverse width constant in the direction of insertion of the screw.

According to a second embodiment, the notch may have a transverse width that tapers in the direction of insertion of the screw.

According to other features of the invention: the notch may have a length substantially identical to that of the hole, - the cut can be closed at the second end of the hole, the member may be a center pillar trim of a motor vehicle.

The invention also relates to the use of such an element comprising a screw hole for facilitating mounting said element on a body structure of a motor vehicle.

We now describe an example implementation of the invention in its various aspects and embodiments, reference to the accompanying drawings, wherein the same numerals denote elements functionally similar compounds: Figure 1 is a perspective view of the screw hole according to the first embodiment of the invention, figure 2 - is a perspective view of the cut-a as defined in Figure 1 according to the first embodiment of the invention,

figure 3 - is a perspective view of the section B-B as defined in Figure 1 according to the first embodiment of the invention,

figure 4 - is a perspective view of the screw hole according to the second embodiment of the invention,

figure 5 - is a perspective view of the cut-a as defined in Figure 4 according to the second embodiment of the invention, and Figure 6 is a perspective view of the section B-B as defined in Figure 4 according to the second embodiment of the invention.

In the description which will follow, will arrive is not exclusively a longitudinal orientation, vertical and transverse orientation as is traditionally used in the automobile and the trihedron indicated by the X, the Y, Z-.

In references to Figures, there is shown a piece or housing 10 defining a hole 12 screw adapted to receive a screw (not shown) for securing the element on a support 14 . 10 in the automotive field, the part can be, for example, a center pillar trim to be fixed to the body of a vehicle and serves as the support 14. the liner is made of a plastic material. The screwing hole 12 is located as shown in the Figures are not limited recessed from an outer surface of the workpiece.

The screw hole is extending therethrough and includes at its first end a surface 16 of corresponding counterbore coaxial with said hole 12 . 18 through the second end and being designed to be in contact with the carrier to enable securing the piece 10 and the support 14 by means of a screw. The surface 16 of counterbore includes a notch 20 which extends over all or part of the length L of the hole 12 and preferably over the entire length. According to the first embodiment, the notch extends along the entire length L of the hole and has a width I substantially constant over said length. According to the second embodiment, the notch extends over the entire length of the hole and has a decreasing width I from its first end 16 and to the second end 18. preferably and as shown in Figures 4 and 6, the width of the incision is closed at the second end 18. this embodiment permits the use of screws in soft materials with self tapping or pointed end.

According to any of the embodiments, the width of the slit can be substantially the same as the width of a screw inlet end 16. However, plus the width will be significant further insertion of the screw will be easy. Furthermore, the depth of the cut can be substantially identical to the height of the counterbore that is in effect, the radial dimension of the sunk surface. the notch 20 22 has a slope inclined defined as the slope is rising from its first end 16 of the hole 12 screwing to provide guidance during positioning of the screw in said hole. In effect, an operator wishing to insert a screw into the hole 12 will apply the shank of the screw, which illustratively may be threaded or of any other type, against the slope and will slide towards the hole 12. thereby the slope for guiding ramp. Inserting the screw into the hole is thus much faster with this guide ramp and saves time during installation of the element 10 on the support 14.