FR2635739A1 - SAFETY BELT ARRANGEMENT WITH CLAMPING DEVICE AND TENSIONER INTEGRATED WITH THE SAME - Google Patents

Abstract

In a seat belt arrangement, in particular for motor vehicles, comprising a belt retractor fixed to an element of the body of the vehicle as well as a tightening device for the band of the belt mounted on the body element of the vehicle, device comprising at least one movable clamping jaw, the clamping device being coupled to a tensioning device for the seat belt, the construction of the tensioning device and of the combined tensioning device should be simplified and offer the possibility of mounting any. To this end, provision is made for a slide 21 movably guided in the longitudinal direction and constituting the tensioning device to be mounted in the movable clamping jaw 15, 18, which slide causes, in the event of release, the formation of a loop 33 in the band 19 of the belt which passes over its front end.

Description

SAFETY BELT ARRANGEMENT WITH CLAMPING DEVICE

AND TENDER INTEGRATED THEREIN.

  The invention relates to a seat belt arrangement

  in particular for motor vehicles, comprising a belt winder attached to an element of the coach of the vehicle and a clamping device for

  mounted on the bodywork element of the vehicle,

  positive device comprising at least one movable clamping jaw, the clamping device being coupled to a device

  to tighten the seat belt.

  A seat belt arrangement of this type is known from DE-OS 34 00 115, its principle being that after triggering controlled by a sensor, the device of

  tightening is activated first, then subsequently or simultaneously

  The tightening device is tightened in order to

  the band of the belt, the entire clamping device being moved along the bodywork element of the vehicle towards the tension and being locked at the end of its tensioning course, so as to avoid as well the release of the belt placed on the body of the person attached by it that excluding the film reel effect of the belt band wound on the belt reel. The training is obtained by a

  pressurized gas released by a gas generator.

  Such an arrangement has the disadvantage that it is necessary to resort to very important constructive measures, in particular to mount the

  tightening together so that it can move

  tudinalement; for this purpose, it is necessary to have recourse as well

  to many components that a pre-adaptation

  these elements to each other. In addition, a

  possible for motor vehicles by means of a

  clamping device with or without tensioning device

This is practically excluded.

  The purpose of the invention is therefore to improve a seat belt arrangement of the type mentioned in the preamble so as to simplify its constitution while

  by being safer, and to provide the pos-

  it is possible to constitute the tensioning device in the form of a removable block of elements for its assembly

  possible on the clamping device.

  The invention is based first of all on the principle according to

  which, as a tensioning device, is provided with a

  pressure slider which can move longitudinally in a guided manner in the movable clamping jaw and which

  causes, in case of triggering, the formation of a

  in the band of the belt passing over its

  before it is in the rest position. To this is linked the advantage that one can use a device of

  already existing, and in particular

  on the earlier German Patent Application 37 25 223, to which reference is also made with reference to the present invention, and that a clamping device of this type can now be easily combined with a tensioning device . The tensioning device of the invention is of simple constitution, thus very

  effective and it can be integrated in a way

  preferred embodiment of the invention in a modular form in the movable clamping jaw of the respective clamping device. This allows to equip possibly and without additional measures of motor vehicles, with or

without tensioning device.

  The invention is however not limited to a mode of

  adapted to the clamping device according to the application

  German Patent 37 25 223 and it can be implemented, in construction with all other types of construction of clamping devices including a

  clamping jaw, taking into account the

  respective differences in the types of construction of these

positive tightening.

  The invention thus advantageously creates a principle

  the power-up function according to which a device

  The linear path crossing the path followed by the waistband of the belt forms a loop and thereby the length of the web relative to the total length of this unwound tape of the tape reel and causes it to be turned on. According to a preferred embodiment of the invention, the slide is arranged facing a fixed abutment for the formation of the loop, the surface of the abutment on which the band of the belt passes is provided with a knurling which

  increases the friction. We are thus assured of

  that because of the formation of a loop in the

  band of the belt, caused by the slider, the

  following the extraction of the belt band from

  of the retractor is made more difficult and that the

  The buckling of the buckle takes place mainly by the re-entry of the waistband from the occupant's body region.

retained by this belt.

  The invention may furthermore be implemented with a

  particularly advantageous way of arranging the trajec-

  followed by the slide on the first section of

  movement and relative to the point of rotation of the

  mobile clamping jaw so as to create a moment of

  opening acting on the clamping jaw, and that on the second movement section it moves so as to create a closing moment acting on the clamping jaw. Thus, the guidance required according to the invention is obtained thanks to the invention by a sliding path disposed in the housing of the device.

  tightening, with which the slide cooperates with

  guide pins arranged laterally. The sliding path

  in a first movement section coincides with the pressure channel in the movable clamping jaw when it is in the rest position and is bent in a second movement section along a path which rotates the clamping jaw and the slider

towards the closed position.

  In the embodiment of the invention which is explained in the following, the clamping device comprising the tensioning device and the belt winder are mounted in a common housing; but this is not essential for the implementation of the invention, and the clamping device comprising the tensioning device can be separated from the belt winder and constituted, in any position, along the path followed by the belt between the belt winder and the

  body of the person attached by the belt.

  In addition, provision can be made to disengage and control the clamping jaw not only following the tensioning of the band of the belt, but to constitute the assembly formed by the clamping device and the tensioning device of way that the clamping jaw can pivot to the belt band each

  when there is a blockage of the shaft of the belt reel

  ture and that it is thus certain that the device is ready to tighten even in the case of light loads. This embodiment is advantageous in arrangements

  seat belts in which the

  ture is of a light constitution, without any absorp-

charge.

  One embodiment of the invention is shown in the drawing which will be described in what follows and in

which: -

  Figure 1 shows the clamping device

  the tensioner device in the rest position and shown in side view with partial tearing, Figure 2 shows the object of Figure 1 in successive operating positions, Figure 3 shows the clamping device

  comprising the tensioning device when the setting

  sion of the belt is complete, Figure 4 is a perspective representation of a

  clamping device with integrated tensioning device.

  In the embodiment shown in the figures, a self-locking belt winder 11 and a

  clamping device 12 comprising a clamping jaw

  fixed rage 13 and a clamping jaw 15

  ter around an axis of rotation 14 are mounted in a

  common housing 10. The movable clamping jaw 15 com-

  takes a hooking branch 16 which bears against the frame 18 of this clamping jaw by means of a deformable insert 17. A constitution of this type of the clamping jaw forms the subject of the German patent application.

previous 37 25 223.

  The band 19 of the belt starts from the self-locking belt winder 11 and is sent upwards between the clamping jaws 13,15 of the clamping device 12 towards the body of the person attached by the belt. At the top end of the device

  12 is provided with a belt guide 20 for

  to have a good extraction or a good return of the band

  19 of the belt in the device.

  In the frame 18 of the mobile clamping jaw

  15 is mounted a slider 21 movable in a longitudinal direction

  tudinal in a pressure channel 22 which, in its posi-

  1, protrudes from the frame 18 of the clamping jaw to a length as

  as the reference position for band 19 of the

  ture from the crown winder 11, it directs it along a rectilinear path, between the clamping jaws 13,15 and up to the belt guide 20. The pressure channel 22 which contains the slider 21 and who guides him is on his side in connection with a

  pressure chamber 23 connected to a gas generator 24.

  the drive load mounted in the latter is ignited in the event of triggering by an unrepresented sensor and connected to the gas generator by electrical conductors 25. The slider 21 comprises guide pins 26 projecting laterally and penetrating into a channel. sliding 27 of the housing 10 o they are guided. As we

  can be seen in detail in Figure 2, the sliding path

  27 subdivides the trajectory followed by the slider 21 in the pressure channel 22 into a first section 28 and a second section 29 before the slider 21 reaches its final output position (FIG. 3) and falls at its rear end into a stop recess 30

  formed in the frame 18 of the clamping jaw,

  which is adapted in form to that of the slider

  21, so as to ensure the angular position of the slide

  bucket 21 relative to the clamping jaw 15. In addition, the sliding path 27 comprises at the beginning of the first section 28 a narrowing 31 by means of which the guide pins 26 of the slide 21 and thereby the slide

  himself are held in their rest position.

  Facing the slide 21 is provided in the housing. 10, a stop 32 for the formation of the loop which, with respect to the path followed by the slider 21 on the first section 28, is disposed below the plane of movement. The distance between the abutment 32 and the plane of the trajectory followed by the slider 21 corresponding to the first section 28 is dimensioned so that, in

  its final position, the slide 21 introduced into the

  stopping element 30 then rests against the abutment 32. To increase the friction with the band 19 of the belt which passes over the abutment 32 during the formation of the loop 33,

  this stop 32 comprises a knurling 34.

  As can be seen from Figures 2 and 3, the first section

  28 of the sliding path 27 which determines the first part of the path followed by the slider 21 is so constituted that the direction of action 35 of the generated forces is located below the point of rotation 14 of the clamping jaw 15, so that during this first phase of the movement of the slider 21 an opening movement is created with respect to the position of the clamping jaws 13, 15 relative to each other.

to the other.

  The second section 29 of the sliding path 27 in the housing 10 is so constituted that because of the guiding of the slider 21 in the sliding path 27 and, therefore, also because of the guiding

  consisting of the clamping jaw 15 connected to the slide

  bucket, it is possible to pivot upwards

  15, so that the direction of action 36 of the forces which continue to act during the second section of the trajectory followed by the slide 21 is

  moves towards the point of rotation 14 so as to provoke

  a closing moment concerning the position of the

  jaws 13, 15 relative to each other.

  The tensioner clamp device de-

  previously written works as follows:

  After triggering of the gas generator by a cap-

  not shown, the gases released in the pressure chamber 23 drive the slider 21 forward in the pressure channel 22, the safety 31 provided for the slider 21 in the sliding channel

  27 being overcome. During the first section of

  28, the slide 21 pushes the belt 19 of the belt

  shape and shape, because of stop 32 and counter

  abutment formed further by the fixed clamping jaw 13, a loop 33. As the surface of the stop 32 is provided with a knurling 34 which increases the friction, the extraction of the belt in the direction of the arrow 37 from the belt winder 11 is made more difficult and it

  As a result, the formation of the loop 33 is essential.

  by pulling the belt in the direction of the arrow 38 from the body of the person held by this belt. During this first movement section 28 is created the opening moment described which acts on the clamping device 13, 15, so that the retraction of the band 19 of the belt, especially in the direction of the

  arrow 38, is not prevented by the clamping jaws.

  During the movement section 29 and because of the shape of the sliding path 27, the slider 21 and the clamping jaw 15 connected thereto are moved from

  that the direction of effect of the forces created be shifted

  towards the point of rotation 14 of the clamping jaw

  15, and that henceforth a closing moment concerning

  the movable clamping jaw 15 is applied, which

initiate the tightening movement.

  When the tensioning movement is completed, the slide

  bucket 21 is introduced by its rear end into the

  stopping element 30 of the frame 18 of the clamping jaw and then applies against the fixed stop 32 and it reinforces, because of its support thus obtained, the clamping effect directed towards the top of the clamping device 13, 15, so that when applying the force of the belt towards the extraction due to the displacement towards

  the front of the person restrained by this belt and

  arrow 42, no removal of the belt

  the opposite direction does not take place, so that the total

  the retention stiffness due to buckle 33 is used.

  Lisa. When the movable clamp jaw 15 pivots to

  the clamping position, the entire load which

  seems to be absorbed by the clamping device, the

  respective lever ports being provided in a manner that

  strengthen the tightening moment when the

clamping jaws are closed.

  FIG. 4 shows the possibility, according to the invention, of constituting the tensioning device with a gas generator, pusher and pressure channel in the form of a module 41, this module being able to be adapted, by its shape, to that of the frame 18 of the movable jaw 15 and insertable

  in it without recourse to other measures concerning the

  the combination of the clamping device and the

  tensioner. Advantageously, the slider 21 is then

  in the form of a plate-shaped pusher 39

  on its front edge, lateral projections 40, the

  the width of the belt band, so as to ensure reliable guidance of the belt 19 during

the formation of the loop 33.

  In the example described above, the gases from the

  generator 24 act directly on the slider 21.

  this action could be carried out internally

mediator of a piston.

Claims (17)

  1. Seat belt arrangement, especially for   vehicles, comprising a winder attached to an element   of the vehicle body and a device for servicing the   rage for the waistband of the belt mounted on the vehicle body member, which comprises at least one movable clamping jaw, the clamping device being coupled to a device for tensioning the safety belt, characterized   in that a slider (21) guided in a movable manner   longitudinal dimension and constituting the tensioning device   arranged in the movable clamping jaw (15, 18), slides   bucket which causes, in case of triggering, the formation of a loop in the band (19) of the belt which passes on its front end.   2. Seat belt arrangement according to the claim   1, characterized in that a fixed stop (32) is provided in front of the slide (21) for forming the loop (33). of the belt.   Seat belt arrangement according to claim 2, characterized in that the trajectory of the slider (21) is   provided on a first movement section (28) and directed   removal of the belt at a certain distance above the stop (32).   4. Seat belt arrangement according to any one   as in claims 1 to 3, characterized in that   jectoire of the slider (21) is arranged during a first   first section of movement (28) relative to the rotation point   (14) of the movable clamping jaw (15) so   to create an opening moment acting on the jaw of ser-   rage (15) and, in a second movement section (29), is such as to create a closing moment acting on the clamping jaw (15).   5. Seat belt arrangement according to the claim   4, characterized in that the path followed by the slider (21) is determined by guiding guide pins (26) mounted laterally on the slider (21) in a guideway (27) formed in the housing (10) clamping device (12).   The seat belt arrangement according to claim 5, characterized in that the path followed by the slider (21) which is subdivided into a first (28) and a second (29) motion section is constituted by the way   slidably (27) in the housing (10).   7. Seat belt arrangement according to the claim   6, characterized in that the sliding path (27),   present in the first movement section (28) of the slide   bucket (21), a path in the same direction as the starting position of the pressure channel (22) of the clamping jaw (15) and is bent in the second movement section (29) and follows a jaw turning path (15) and the slide (21) towards the closed position of the clamping device (12).   8. Seat belt arrangement according to any one   claims 5 to 7, characterized in that the   slider (21) is retained, in its rest position, by narrowing (31) retaining the guide pins (26) of the slider (21) and correspondingly constituted in the   sliding track (27) of the casing (10).   9. Seat belt arrangement according to any one   claims 1 to 8, characterized in that it is   in the frame (18) of the movable clamping jaw (15),   a stop recess (30) in which the slide (21) falls   be by its rear end at the end of its trajectory and in   the stop recess (30) is formed so as to de-   terminate the position of the slide (21) relative to the stop (32) of the stacker (10).   10. Seat belt arrangement according to any one   Claims 1 to 9, characterized in that the stop   fixed (32) comprises, on its edge on which the strip passes (19)   of the belt for the formation of the loop (33), a forma- (34) increasing the friction.   11. Seat belt arrangement according to any one   Claims 1 to 10, characterized in that the slide   bucket (21) is constituted in the form of a plate (39) whose width corresponds to the width of the belt (19) of the belt.   12. Seat belt arrangement according to claim   cation 11, characterized in that the slider in the form of   plate (39) comprises, on its front edge, protrusions of   lateral miter (40) for laterally surrounding the band (19) of the belt.   13. Seat belt arrangement according to any one   claims 1 to 12, characterized in that the slide   bucket (12) is entrained by a gas under pressure and guided in   a pressure channel (22) formed in the jaw of rabies (15).   14. A seat belt arrangement according to claim   cation 13, characterized in that the pressure channel (22) is   directly connected to a gas generator (24).   15. Seat belt arrangement according to the claim   13, characterized in that a pressure chamber (23) is inserted between the pressure channel (22) and the generator of gas (24).   16. Seat belt arrangement according to the claim   13, characterized in that a gas generator (24) acts by means of a piston on the slider (21) in the pressure channel (22).   17. Seat belt arrangement according to any one   claims 1 to 16, characterized in that the provision   valve with gas generator (24), slide (21, 39)   and pressure channel (22) is constituted as a set   modularly (41) and is adapted, by its external shape, to that of the frame (18) of the movable clamping jaw (15) and   can be inserted in the latter.