FR2995546A1 - Grip for disassembling receiving sheath in sliding motion from assembly rod of automobile head-rest of vehicle seat, has cam elements cooperating with reciprocal elements to make passage of jaws from loosened to tightened configurations - Google Patents

Abstract

The grip (1) has jaws (5) mounted in rotation on a plate so as to confer between a loosened configuration and a tightened configuration. A movable branch (7) is mounted in rotation relative to the plate so as to actuate between isolated position and closer position of a fixed branch. Cam elements are interdependent of the movable branch. The cam elements cooperate with reciprocal elements provided on the jaws to make passage of the jaws from the loosened configuration to the tightened configuration when the movable branch is actuated from its isolated position to its closer position.

Description

The invention relates to a dismounting clamp for a sliding receiving sheath of a motor vehicle seat headrest mounting rod.

It is known to produce a sheath - in particular of molded plastic material - for sliding reception of a mounting rod of a motor vehicle headrest, said sheath comprising a tubular body for receiving said rod, said body comprising two lower tongues retractable elastically inward, the free end of which is intended to be anchored to a structure - in particular in the form of a metal sleeve integral with the backrest of said seat - for receiving said sheath, said tabs being diametrically opposed to each other; the other, this with respect to the axis of revolution according to which generally extends said tubular body.

With such an arrangement, the sheath of its receiving structure can be easily dismounted by pinching the tongues towards one another, making it possible to disengage the free ends of said structure, an operation which may be required in particular during a repair of the seat.

It is also known to make a sheath whose tabs are offset from one another by an angle of substantially 90 °, this with respect to the axis of revolution mentioned above. In this case, the disassembly of the sheath of its support is complex since we can no longer be satisfied with a pinching of the tongues towards one another. The invention aims to provide a tool for carrying out such disassembly.

For this purpose, the invention proposes a dismounting clip for a sliding receiving sheath of a motor vehicle seat headrest mounting rod, said sheath comprising a tubular body for receiving said rod, said body comprising two lower tabs retractable elastically inward, the free end is intended to be anchored to a receiving structure of said sheath, said tabs being offset from each other by an angle of substantially 90 ° said gripper comprising: - a fixed branch whose one end is provided with a plate, - two pairs of jaws rotatably mounted on said plate so as to be able to debate between a loosened configuration and a constricted configuration, said jaws projecting upwards of said plate and being positioned relative to each other in a symmetry of order four with respect to a substantially vertical axis, - a movable limb the rotation in rotation relative to said plate along said axis, so as to be operable between a spaced position and a position close to said fixed branch, - four cam members secured to said movable branch, said elements cooperating with four reciprocal elements provided on said said jaws so as to move said pairs of jaws from their loosened configuration to their constricted configuration when said movable branch is actuated from its spaced apart position to its close position.

In this description, the terms of positioning in space (top, bottom, vertical, ...) are taken with reference to the clamp in use on a seat in use configuration, its backrest being substantially vertical. When it is said that the tongues are shifted by substantially 90 °, this refers to the axis of revolution in which generally extends the tubular body of the sheath. With the proposed arrangement, the clamp is first arranged so that, while in the loosened configuration, the jaws surround the tabs. The tightened configuration is then carried out by actuating the movable arm towards its close position. 2995 546 3 This has the effect of exerting a retraction of the tongues inwardly, with the effect of disengaging the free ends of the tongues of the receiving structure of the sheath and allowing disassembly of said sheath. Note that the angular positioning of the clamp relative to the tabs and unimportant, the compression of the tabs being done in all the angular positions, either by a single jaw tab, if the jaws are aligned with the tabs, or by two jaws 10 contiguous by tongue, if the latter are "on horseback" on two jaws. Other features and advantages of the invention will become apparent from the description which follows, made with reference to the appended figures, in which: FIGS. 1 are a general view of a clamp / sheath assembly, the jaws of the clamp being in the loosened configuration (1a), the movable branch being in the spaced apart position, and in the constricted configuration (1b), the movable branch being in a close position, - Figures 2a and 2b are partial partial views of FIGS. 1b, 20 - Figures 3a and 3b are respective views in partial vertical section of Figures 1a and 1b. Referring to the figures, there is disclosed a clip 1 for disassembling a sheath 2, in particular of molded plastic material - slidably receiving a mounting rod of a motor vehicle seat headrest, said sheath comprising a body Tubular receiving said rod, said body comprising two lower tongues 22 retractable elastically inward, the free end 23 is intended to anchor on a receiving structure - not shown and in particular in the form of metal sleeve 30 secured a backrest of said seat - said sheath, said tabs being offset from each other by an angle of substantially 90 °, said clamp comprising: - a fixed branch 3, one end of which is provided with a plate 4 two pairs of jaws 5 rotatably mounted on said plate so as to be able to debate between a loosened configuration and a constricted configuration, said jaws protruding from s the top of said plate and being positioned relative to each other in a symmetry of order four with respect to a substantially vertical axis 6, - a movable branch 7 rotatably mounted relative to said plate along said axis, so as to be operable between a position spaced apart and a position close to said fixed branch, - four cam members 8 secured to said movable branch, said elements cooperating with four reciprocating elements 9 provided on said jaws so as to pass said pairs of jaws of their configuration loosened to their constricted configuration when said movable arm is actuated from its remote position to its close position.

The clamp 1 shown further comprises a first spring 10 for returning the movable branch 7 to its spaced position, so that the user simply has to bring it closer to the fixed branch 3 to disassemble the sheath 2.

Furthermore, the clamp 1 shown further comprises at least one second spring 11 - here spiral - tending to bring the pairs of jaws 5 loose configuration, so that said clamp can be directly disposed on the sheath 2 to allow disassembly.

According to the embodiment shown, the cam members 8 are in the form of cam surfaces disposed on a washer 12 secured to one end of the movable arm 7. The jaws 5 are here associated with the plate 4 by means of projections 13 to the top adjoining the inner wall 14 of the washer 12. It is now described the use of a clamp 1 to disassemble a sheath 2 of its receiving structure.

With the proposed arrangement, the clamp 1 is first arranged so that, while in the loosened configuration, the jaws 5 surround the tabs 22.

The tightened configuration is then carried out by actuating the movable branch 7 towards its close position. This has the effect of exerting a retraction of the tongues 22 inwardly, with the effect of disengaging the free ends 23 of the receiving structure of the sheath 2 and allowing disassembly of said sheath.

Claims (5)

REVENDICATIONS1. Clip (1) for dismounting a sheath (2) for sliding reception of a motor vehicle seat headrest mounting rod, said sheath comprising a tubular receiving body (21) for said rod, said rod body comprising two lower tabs (22) retractable elastically inward, the free end (23) is intended to be anchored to a receiving structure of said sheath, said tabs being offset from each other; an angle of substantially 90 °, said clamp comprising: - a fixed branch (3) whose one end is provided with a plate (4), - two pairs of jaws (5) rotatably mounted on said plate so as to be able to debate between a loosened configuration and a constricted configuration, said jaws projecting upwards from said plate and being positioned relative to each other in a symmetry of order four with respect to a substantially vertical axis (6); bile (7) mounted in rotation relative to said plate along said axis, so as to be operable between a spaced position and a position close to said fixed branch, - four cam members (8) integral with said movable branch, said elements cooperating with four reciprocating elements (9) provided on said jaws so as to move said pairs of jaws from their loosened configuration to their constricted configuration when said movable branch is actuated from its spaced apart position to its close position. 2. Clip according to claim 1, characterized in that it further comprises a first spring (10) for returning the movable branch (7) to its spaced apart position. 3. Pliers according to claim 1 or 2, characterized in that it further comprises at least one second spring (11) for tending tending to bring the pairs of jaws (5) in loosened configuration. 4. Pliers according to any one of claims 1 to 3, characterized in that the cam elements (8) are in the form of cam surfaces disposed on a washer (12) integral with one end of the movable arm (7). ). 5. Clip according to claim 4, characterized in that the jaws (5) are associated with the plate (4) by means of protrusions (13) upwardly adjacent the inner wall (14) of the washer (12).