Device for the feed-through and strain relief of strands
The invention relates to a device for the feed-through and strain relief of strands through a wall opening having a frame arranged around and/or at least partially in the wall opening, having at least one strain relief grommet which encloses the strand and is accommodated at least positively in the frame, wherein the frame comprises at least two detachably connected frame parts, between which the strain relief grommet is directly or indirectly pressed in the connected state of the frame parts. The invention is characterized in that the strain relief grommet has at least two sections which, in the compressed state with the strand inserted, are spaced apart from one another or, at most, are connected via at least one elastic region, so that the force flow between the at least one first section and the at least one other section extends via the strand.
1. A device for feed-through and strain relief of strands through a wall opening, the strands extending along an axial direction, comprising:
a frame disposable within the wall opening and including at least two detachably connected frame parts; and
at least one strain relief grommet positioned within the frame, the strain relief grommet substantially enclosing at least one of the strands and including at least two grommet sections which, in a compressed state with a strand inserted between the grommet sections, are spaced apart from one another with a gap therebetween which extends in a plane one of parallel and oblique to the axial direction of the inserted strand, and wherein the grommet sections have a hardness greater than 75 Shore A and also do not abut one another in use such that a compressive force between the at least two grommet sections is transferred via the strand.
2. The device of claim 1 , further comprising an elastic region connecting the first and second grommet sections.
3. The device of claim 1 , wherein the at least two grommet sections are inserted into corresponding openings of the at least two frame parts.
4. The device of claim 1 , wherein the frame sections include projections disposed proximate a location of contact between the strand and the grommet sections.
5. The device of claim 4 , wherein the projections extend in one of an axial direction and a transverse direction relative to the axial direction of the strand.
6. The device of claim 5 , wherein the projections include a plurality of perforations disposed in a circumferential direction of the strand.
7. The device of claim 1 , wherein in the axial direction of the strand, upstream or downstream of the strain relief grommet, a sealing grommet is provided for abutment against the strand and for positive accommodation in the frame, the sealing grommet having a hardness of less than 75 Shore-A.
8. The device of claim 7 , wherein the sealing grommet is formed in one piece and is foldable to an open position along the axial direction of the strand and including a slot that is closed in a closed position of the sealing grommet.
9. The device of claim 2 , wherein the at least one elastic region is formed as a film hinge.
10. The device of claim 1 , wherein the grommet sections further include projections extending from contact surfaces thereof.
11. The device of claim 1 , wherein the grommet sections include external projections engaged within the frame parts.