WO2001081129A1 - Seat belt guide - Google Patents

Seat belt guide Download PDF

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Publication number
WO2001081129A1
WO2001081129A1 PCT/US2000/034790 US0034790W WO0181129A1 WO 2001081129 A1 WO2001081129 A1 WO 2001081129A1 US 0034790 W US0034790 W US 0034790W WO 0181129 A1 WO0181129 A1 WO 0181129A1
Authority
WO
WIPO (PCT)
Prior art keywords
seat belt
sliding shell
guide
flexing bar
flexing
Prior art date
Application number
PCT/US2000/034790
Other languages
French (fr)
Inventor
Martin Specht
Original Assignee
Breed Automotive Technology, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Breed Automotive Technology, Inc. filed Critical Breed Automotive Technology, Inc.
Priority to AU2001222853A priority Critical patent/AU2001222853A1/en
Publication of WO2001081129A1 publication Critical patent/WO2001081129A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices
    • B60R2022/1818—Belt guides

Definitions

  • the present invention relates to a seat belt guide .
  • DE 199 40 852 Al has a low friction material provided on a flexing bar in the region of a belt webbing guide face.
  • the guide body can be produced from a metal plate by pressing and has a flexing bar with a substantially C-shaped cross-section.
  • the flexing bar is connected to an anchoring plate via flexing bar carriers leaving a relatively narrow belt webbing guide aperture.
  • the belt webbing guide face on the flexing bar has low friction, provided for example by a single or multi-layer plating or galvanizing or by a multi-layer coating with solid lubricating properties. This surface treatment is relatively expensive.
  • a seat belt guide with low friction in the region of the belt webbing guide face of the flexing bar A sliding shell made of a low friction material is placed on the belt webbing guide face of the flexing with an interlocking fit and over the two faces of the transition points between the flexing bar and flexing bar carrier and, if necessary, at least partially over the flexing bar carrier.
  • the sliding shell which can be a plastic clip, has a wall thickness of the order of about 0.4 mm to 0.6 mm.
  • the inner contour of the sliding shell rests with an interlocking fit on the surface of the metallic flexing bar and forms the low-friction belt webbing guide face of the guide in the belt guide aperture of the metallic guide body.
  • the adhesive force with which the sliding shell is clipped with an interlocking fit on the flexing bar is dimensioned such that it can diminish the forces that occur at least during normal belt retractor operation.
  • the two lateral edges of the sliding shell preferably project beyond the two rounded regions of the transition points of the flexing bar carrier extending vertically with respect to the flexing bar.
  • the sliding shell defines the belt webbing guide aperture in the guide body in the regions in which the seat belt webbing is guided and deflected around.
  • the guide forms the upper guide point of the webbing, lying above the shoulder of the vehicle occupant.
  • an ideal sliding surface is achieved without any friction or friction angle contours, in particular due to the flanging of the sliding shell ends in the lateral rounded parts of the belt webbing guide aperture.
  • Even with oblique extraction of the seat belt there is no danger of the edges of the seat belt webbing catching with high friction in the corner contours or other contours of the guide body.
  • Fig. 1A is a front view of a seat belt guide body.
  • Fig. IB is a front view of an embodiment of a seat belt guide wherein a sliding shell has been assembled with the guide body of Fig. 1A.
  • Fig. 2 is a perspective view of an embodiment of a sliding shell.
  • Fig. 3 shows a further embodiment of the sliding shell which is used in the embodiment in Fig. 1.
  • Fig. 4 is a schematic view of a flexing diagonal that occurs during seat belt extraction or retraction.
  • FIG. 1A An exemplary metallic seat belt guide body 1 is shown in Fig. 1A.
  • a flexing bar 3 Provided on the metallic guide body is a flexing bar 3.
  • the flexing bar 3 is laterally connected via two flexing bar carriers 5, 6 to an anchoring plate 17.
  • the flexing bar and two flexing bar carriers cooperate with the anchoring plate to define a webbing guide aperture 10.
  • a bearing point 2 can be connected to a vehicle structure, for example in the region of a B-column of the vehicle.
  • the bearing point is formed in the anchoring plate 17 of the guide body 1.
  • a belt webbing guide face 16 is formed on the flexing bar 3 by a sliding shell 7 located in the region of the belt webbing guide aperture 10.
  • the sliding shell shown in perspective in Figs. 2 and 3, is preferably a plastic clip.
  • Suitable plastic materials for the sliding shell are polyacetal plastics, in particular polyoxymethylene (POM) .
  • POM polyoxymethylene
  • Other low-friction plastic materials can also be used, for example based on tetrafluorethylene and similar materials. If necessary, lubricating additives such as talcum or semi-fluorinated alkanes and similar materials can be mixed with the sliding shell material.
  • sliding shells 7 shown in Figs. 2 and 3 are clip shells that can be placed, with an interlocking fit, on the guide body 1 as shown in Fig. IB. In this process the shell encloses the flexing bar 3.
  • the flexing bar 3 of the guide body can have a C-shaped cross-section that is complementary to the interior surface of the sliding shell.
  • the sliding shell 7 has a belt webbing guide face 16 located in the belt guide aperture 10 over which a seat belt webbing 4 (Fig. 4) is guided and deflected. As shown in Figs. 2 and 3, the sliding shell 7 has a substantially U-shaped or C-shaped cross-section.
  • the inner face of the sliding shell When clipped onto the guide body 1, the inner face of the sliding shell has an interlocking fit with the guide body, substantially with its entire contour on the faces of the flexing bar 3 and in the region of the transition points 8, 9 between the flexing bar carriers 5, 6 and the flexing bar 3.
  • the contour of the inner face of the sliding shell 7 corresponds to the outer surfaces of the flexing bar 3 and the outer surface on the rounded, in particular circular, rounded • transition points 8, 9.
  • the sliding shell also preferably extends over curved regions of the flexing bar carriers 5, 6 or the transition points 8, 9, these curved regions extending vertically with respect to the flexing bar 3.
  • the faces of the sliding shell defining the lateral limitations of the belt webbing guide aperture 10 are provided on the domed shell parts 11, 12.
  • the ends of the sliding shell extend as flanged shell ends 14, 15 over the domed shell parts 11, 12.
  • the flanged shell ends 14, 15 come to be located in the regions of the flexing bar carriers 5, 6 that extend towards anchoring plate 17.
  • inwardly oriented clip-over edges 18 are provided on the sliding shell 7.
  • the clip-over edges lie with interlocking fit behind the outer edge or a corresponding shaping of the guide profile on the flexing bar 3, the bent transition points and the flexing bar carriers 5, 6 of the metallic guide body. Further improvement of the attachment of the sliding shell 7 on the guide body 1 is thus achieved.
  • a low-friction belt webbing guide face 16 is achieved on the flexing bar 3.
  • This low- friction belt webbing guide face is continued in the domed lateral shell parts 11, 12.
  • the actual flexing function in the belt webbing takes place on a flexing diagonal 19 (Fig. 4) during belt extraction and belt retraction.
  • the length of the flexing diagonal is larger than the width of the belt webbing 4, as can be seen in Fig. 4.
  • the length of the flexing diagonal is about 52 to 55 mm when the width of the belt webbing is 48 mm.
  • this flexing diagonal it is necessary to achieve the low friction in the belt webbing guide face on the flexing bar 3 and in the domed shell parts in which the longitudinal edges of the seat belt webbing are guided during oblique extraction.
  • the guide body 1 is defor able when there is a preselected load emanating from the belt webbing, for example in the event of a crash, wherein the flexing bar bends substantially symmetrically with respect to the anchoring hole, as described in
  • a trough is formed in the region of the flexing bar 3, as a result of which the necessary guide security is achieved in the event of a crash, even with reduced overall size of the seat belt guide.
  • the webbing 4 is then guided in the trough in the deformed flexing bar 3.
  • the belt webbing is prevented from slipping from the deformed flexing bar 3 and the guide is prevented from tilting around the bearing point 2.
  • the sliding properties in the region of the belt webbing guide face 16 can be improved by a textured design, in particular for a polyester belt webbing fabric.
  • This textured design can be specially adapted to the texture of the course of the warp of the belt webbing 4.
  • a further stabilizing effect of the textured design can be achieved by a plastic chroming.
  • Different grained pattern textures can be selected depending on the seat belt webbing used in each case.

Abstract

A seat belt guide has a metallic body (1) for mounting on a vehicle structure. A flexing bar (3) has a low-friction belt webbing guide face around which webbing of a seat belt is guided. The flexing bar and two flexing bar carriers (5) define a webbing guide aperture (10). A belt webbing guide face is formed by a sliding shell (7) that is clipped on with an interlocking fit in the region of the flexing bar and the flexing bar carriers.

Description

SEAT BELT GUIDE
The present invention relates to a seat belt guide . A seat belt guide of the type known from
DE 199 40 852 Al has a low friction material provided on a flexing bar in the region of a belt webbing guide face. The guide body can be produced from a metal plate by pressing and has a flexing bar with a substantially C-shaped cross-section. The flexing bar is connected to an anchoring plate via flexing bar carriers leaving a relatively narrow belt webbing guide aperture. The belt webbing guide face on the flexing bar has low friction, provided for example by a single or multi-layer plating or galvanizing or by a multi-layer coating with solid lubricating properties. This surface treatment is relatively expensive.
There is provided in accordance with the present invention a seat belt guide with low friction in the region of the belt webbing guide face of the flexing bar. A sliding shell made of a low friction material is placed on the belt webbing guide face of the flexing with an interlocking fit and over the two faces of the transition points between the flexing bar and flexing bar carrier and, if necessary, at least partially over the flexing bar carrier. The sliding shell, which can be a plastic clip, has a wall thickness of the order of about 0.4 mm to 0.6 mm. The inner contour of the sliding shell rests with an interlocking fit on the surface of the metallic flexing bar and forms the low-friction belt webbing guide face of the guide in the belt guide aperture of the metallic guide body. The adhesive force with which the sliding shell is clipped with an interlocking fit on the flexing bar is dimensioned such that it can diminish the forces that occur at least during normal belt retractor operation. The two lateral edges of the sliding shell preferably project beyond the two rounded regions of the transition points of the flexing bar carrier extending vertically with respect to the flexing bar. As a result there is achieved, at the two ends of the sliding shell, a flanging over the two laterally rounded-off regions of the sliding shell, which laterally define the belt webbing guide aperture. As a result the sliding shell is fixed in all directions . Vertical and/or horizontal movement of the sliding shell on the metallic guide body is therefore prevented. The sliding shell defines the belt webbing guide aperture in the guide body in the regions in which the seat belt webbing is guided and deflected around. With a three point seat belt system, the guide forms the upper guide point of the webbing, lying above the shoulder of the vehicle occupant. During retraction and extraction of the seat belt an ideal sliding surface is achieved without any friction or friction angle contours, in particular due to the flanging of the sliding shell ends in the lateral rounded parts of the belt webbing guide aperture. Even with oblique extraction of the seat belt, there is no danger of the edges of the seat belt webbing catching with high friction in the corner contours or other contours of the guide body. Brief Description of the Drawings
Fig. 1A is a front view of a seat belt guide body. Fig. IB is a front view of an embodiment of a seat belt guide wherein a sliding shell has been assembled with the guide body of Fig. 1A.
Fig. 2 is a perspective view of an embodiment of a sliding shell. Fig. 3 shows a further embodiment of the sliding shell which is used in the embodiment in Fig. 1.
Fig. 4 is a schematic view of a flexing diagonal that occurs during seat belt extraction or retraction.
Detailed Description of the Invention
An exemplary metallic seat belt guide body 1 is shown in Fig. 1A. Provided on the metallic guide body is a flexing bar 3. The flexing bar 3 is laterally connected via two flexing bar carriers 5, 6 to an anchoring plate 17. The flexing bar and two flexing bar carriers cooperate with the anchoring plate to define a webbing guide aperture 10. As a through-hole for a screw connection, a bearing point 2 can be connected to a vehicle structure, for example in the region of a B-column of the vehicle. The bearing point is formed in the anchoring plate 17 of the guide body 1. With reference to Fig. IB a belt webbing guide face 16 is formed on the flexing bar 3 by a sliding shell 7 located in the region of the belt webbing guide aperture 10. The sliding shell, shown in perspective in Figs. 2 and 3, is preferably a plastic clip. Suitable plastic materials for the sliding shell are polyacetal plastics, in particular polyoxymethylene (POM) . Other low-friction plastic materials can also be used, for example based on tetrafluorethylene and similar materials. If necessary, lubricating additives such as talcum or semi-fluorinated alkanes and similar materials can be mixed with the sliding shell material.
The embodiments of sliding shells 7 shown in Figs. 2 and 3 are clip shells that can be placed, with an interlocking fit, on the guide body 1 as shown in Fig. IB. In this process the shell encloses the flexing bar 3. The flexing bar 3 of the guide body can have a C-shaped cross-section that is complementary to the interior surface of the sliding shell. The sliding shell 7 has a belt webbing guide face 16 located in the belt guide aperture 10 over which a seat belt webbing 4 (Fig. 4) is guided and deflected. As shown in Figs. 2 and 3, the sliding shell 7 has a substantially U-shaped or C-shaped cross-section. When clipped onto the guide body 1, the inner face of the sliding shell has an interlocking fit with the guide body, substantially with its entire contour on the faces of the flexing bar 3 and in the region of the transition points 8, 9 between the flexing bar carriers 5, 6 and the flexing bar 3. In particular, the contour of the inner face of the sliding shell 7 corresponds to the outer surfaces of the flexing bar 3 and the outer surface on the rounded, in particular circular, rounded • transition points 8, 9. The sliding shell also preferably extends over curved regions of the flexing bar carriers 5, 6 or the transition points 8, 9, these curved regions extending vertically with respect to the flexing bar 3. The faces of the sliding shell defining the lateral limitations of the belt webbing guide aperture 10 are provided on the domed shell parts 11, 12.
In the embodiments shown, the ends of the sliding shell extend as flanged shell ends 14, 15 over the domed shell parts 11, 12. The flanged shell ends 14, 15 come to be located in the regions of the flexing bar carriers 5, 6 that extend towards anchoring plate 17. In the embodiment shown in Fig. 3, inwardly oriented clip-over edges 18 are provided on the sliding shell 7. The clip-over edges lie with interlocking fit behind the outer edge or a corresponding shaping of the guide profile on the flexing bar 3, the bent transition points and the flexing bar carriers 5, 6 of the metallic guide body. Further improvement of the attachment of the sliding shell 7 on the guide body 1 is thus achieved. By means of the thin-walled sliding shell 7, which is formed, as described hereinbefore, as a clip-on shell, a low-friction belt webbing guide face 16 is achieved on the flexing bar 3. This low- friction belt webbing guide face is continued in the domed lateral shell parts 11, 12. These form, as already explained, the lateral limitation of the belt webbing guide aperture 10. This produces an ideal sliding surface without any friction joints or friction angle contours. The actual flexing function in the belt webbing takes place on a flexing diagonal 19 (Fig. 4) during belt extraction and belt retraction. The length of the flexing diagonal is larger than the width of the belt webbing 4, as can be seen in Fig. 4. With a belt webbing extraction angle of about 30°, as shown schematically in Fig. 4, the length of the flexing diagonal is about 52 to 55 mm when the width of the belt webbing is 48 mm. In the region of this flexing diagonal, it is necessary to achieve the low friction in the belt webbing guide face on the flexing bar 3 and in the domed shell parts in which the longitudinal edges of the seat belt webbing are guided during oblique extraction. With conventional vehicle types there is a solid angle position of the seat belt webbing of about 45° x 45° x 45° and therefore the described widening of the webbing region (flexing diagonal) which must be guided with low friction on the guide on the belt webbing guide face. Preferably, the guide body 1 is defor able when there is a preselected load emanating from the belt webbing, for example in the event of a crash, wherein the flexing bar bends substantially symmetrically with respect to the anchoring hole, as described in
DE 100 11 725.2. When there is a deformation of this type of guide body, the sliding shell is displaced from the guide body 1. The sliding shell therefore has no load bearing function in the event of a crash. This function is adopted by the guide body alone. The sliding shell 7 can optionally be pulled off the guide body 1 when the seat belt is tightened or on subsequent passing through of the belt webbing during the load-limited forward displacement of the vehicle occupant.
Due to the homogeneous bending of the flexing bar, optionally achieved by corresponding dimensioning of the flexing bar carriers 5, 6, a trough is formed in the region of the flexing bar 3, as a result of which the necessary guide security is achieved in the event of a crash, even with reduced overall size of the seat belt guide. The webbing 4 is then guided in the trough in the deformed flexing bar 3. The belt webbing is prevented from slipping from the deformed flexing bar 3 and the guide is prevented from tilting around the bearing point 2.
The sliding properties in the region of the belt webbing guide face 16 can be improved by a textured design, in particular for a polyester belt webbing fabric. This textured design can be specially adapted to the texture of the course of the warp of the belt webbing 4. A further stabilizing effect of the textured design can be achieved by a plastic chroming. Different grained pattern textures can be selected depending on the seat belt webbing used in each case.

Claims

1. A seat belt guide comprising a bearing point (2) for the pivotal mounting of a metallic guide body (1) on a vehicle structure, a flexing bar (3) comprising a low-friction belt webbing guide face around which a belt webbing is guided, two flexing bar carriers (5) connect the flexing bar and anchoring plate and cooperate with the flexing bar and anchoring plate to define a webbing guide aperture (10), two transition points (9) laterally border the belt webbing guide aperture, a sliding shell (7) made of low-friction material with an adhesive force for receiving forces occurring during normal operation is attached with an interlocking fit on the belt webbing guide face of the flexing bar (3) and over the two transition points, the sliding shell has a low friction belt webbing guide face in the belt webbing guide aperture.
2. The seat belt guide according to claim 1, wherein the sliding shell (7) is a plastic clip.
3. The seat belt guide according to claim 1 wherein the sliding shell (7) comprises a polyacetal plastic material.
4. The seat belt guide according to claim 1 wherein the sliding shell (7) comprises polyoxymethylene.
5. The seat belt guide according to any of claims claim 1 to 4 wherein the sliding shell (7) has two lateral shell ends that project beyond the two rounded regions of the transition points.
6. The seat belt guide according to any of claims 1 to 4 wherein the sliding shell (7) has two lateral shell ends that project beyond the flexing bar carriers .
7. The seat belt guide according to any of the preceding claims wherein the sliding shell (7) has a substantially U-shaped profile.
8. The seat belt guide according to any of the preceding claims wherein the sliding shell (7) has a substantially C-shaped profile.
9. The seat belt guide according to any of the preceding claims further comprising clip-over edges
(18) that are bent inwards provided on the longitudinal edges of the sliding shell (7) .
10. The seat belt guide according any of the preceding claims wherein the guide body (1) can be deformed when there is a preselected load from the belt webbing and the flexing bar (3) bends substantially symmetrically with respect a bearing point (2) .
11. The seat belt guide according to claim 10 wherein when the guide body (1) is deformed the sliding shell (7) is released from the guide body.
PCT/US2000/034790 2000-04-25 2000-12-20 Seat belt guide WO2001081129A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001222853A AU2001222853A1 (en) 2000-04-25 2000-12-20 Seat belt guide

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10020246.2 2000-04-25
DE2000120246 DE10020246C2 (en) 2000-04-25 2000-04-25 Deflection fitting for a seat belt of a motor vehicle

Publications (1)

Publication Number Publication Date
WO2001081129A1 true WO2001081129A1 (en) 2001-11-01

Family

ID=7639882

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/034790 WO2001081129A1 (en) 2000-04-25 2000-12-20 Seat belt guide

Country Status (3)

Country Link
AU (1) AU2001222853A1 (en)
DE (1) DE10020246C2 (en)
WO (1) WO2001081129A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2004203306B2 (en) * 2003-07-22 2006-07-27 Jin Hee Kang Improved Pillar Anchor and Method for Manufacturing the Same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005059981B3 (en) * 2005-12-13 2007-08-02 Autoliv Development Ab Buckle for supporting safety belt has the support bar fitted with deformable elements with low friction coating

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3959855A (en) * 1975-10-29 1976-06-01 Fisher Robert C Shoulder strap bracket
DE3427757A1 (en) * 1983-08-02 1985-02-14 Rud-Kettenfabrik Rieger & Dietz Gmbh U. Co, 7080 Aalen Accessory for a deflection fitting for safety belts
DE3328271A1 (en) * 1983-08-02 1985-02-21 Rud-Kettenfabrik Rieger & Dietz Gmbh U. Co, 7080 Aalen Deflection fitting for safety belts and process for producing it
GB2144971A (en) * 1983-08-16 1985-03-20 Stil Ind Ab An arrangement in a loop fitting or locking tongue for retractor-type safety belts
EP0689973A1 (en) * 1994-06-14 1996-01-03 Takata Corporation Slip anchor for seat belt device
DE19940852A1 (en) 1998-08-27 2000-03-02 Takata Corp Vehicle safety belt insertion end has low friction coating on rubbing surface, promoting smoother, jerk-free operation

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8611961U1 (en) * 1970-06-18 1986-07-31 Bröderna Holmbergs Fabriks AB, Anderstorp Deflection fitting
DE2825548A1 (en) * 1978-06-10 1979-12-13 Volkswagenwerk Ag Seat belt lead fitting - has vertical legs connecting web part with fixing part fitted at right angles to it
SE8203219L (en) * 1982-05-25 1983-11-26 Stil Ind Ab DEVICE OR SCREW BELT TO THE ROLLER BELT
DE10011725C1 (en) * 2000-03-10 2001-07-19 Breed Automotive Tech Fixing loop for automobile seatbelt strap has anchoring plate with anchoring bore for pivot pin and deflection edge around which seatbelt strap is passed

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3959855A (en) * 1975-10-29 1976-06-01 Fisher Robert C Shoulder strap bracket
DE3427757A1 (en) * 1983-08-02 1985-02-14 Rud-Kettenfabrik Rieger & Dietz Gmbh U. Co, 7080 Aalen Accessory for a deflection fitting for safety belts
DE3328271A1 (en) * 1983-08-02 1985-02-21 Rud-Kettenfabrik Rieger & Dietz Gmbh U. Co, 7080 Aalen Deflection fitting for safety belts and process for producing it
GB2144971A (en) * 1983-08-16 1985-03-20 Stil Ind Ab An arrangement in a loop fitting or locking tongue for retractor-type safety belts
EP0689973A1 (en) * 1994-06-14 1996-01-03 Takata Corporation Slip anchor for seat belt device
DE19940852A1 (en) 1998-08-27 2000-03-02 Takata Corp Vehicle safety belt insertion end has low friction coating on rubbing surface, promoting smoother, jerk-free operation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2004203306B2 (en) * 2003-07-22 2006-07-27 Jin Hee Kang Improved Pillar Anchor and Method for Manufacturing the Same

Also Published As

Publication number Publication date
DE10020246A1 (en) 2001-11-08
AU2001222853A1 (en) 2001-11-07
DE10020246C2 (en) 2003-03-06

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