WO2004080768A1

WO2004080768A1 - Slip anchor for seat belt device and method of manufacturing the slip anchor

Info

Publication number: WO2004080768A1
Application number: PCT/JP2003/002947
Authority: WO
Inventors: Mutsumi Sugimoto
Original assignee: Yuugengaisha Mutsumichi Kenkyujo
Priority date: 2003-03-12
Filing date: 2003-03-12
Publication date: 2004-09-23
Also published as: AU2003221364A1; JPWO2004080768A1

Abstract

A slip anchor (10) for a seat belt device capable of being manufactured by molding resin coating material (14) on a metal plate (11), comprising an anchor fitting part (12) fitted to a vehicle body side and a webbing guide part (13) slidably supporting a webbing (W) formed integrally with each other, the webbing guide part (13) having a guide path (18) for webbing insertion for slidably guiding the webbing (W) in longitudinal direction further comprising a webbing support part (16) for supporting the webbing (W) and a hood-like guide bellows part (17) formed integrally with each other, wherein the guide bellows part (17) is bent from the webbing support part (16) to a webbing extraction side and formed integrally with the webbing support part (16), whereby the jamming of the webbing can be surely prevented by effectively preventing the webbing from being bent and twisted, and thus the sliding of the webbing can be stably and smoothly guided.

Description

Description: Slip anchor for sheet belt device and method of manufacturing the same

The present invention relates to a slip anchor technique for guiding a webbing of a seat belt device slidably in a longitudinal direction thereof, and particularly to a slip anchor for a seat belt device for preventing a jamming phenomenon of the webbing and a method of manufacturing the same. Background art

The seat belt device attached to the vehicle seat of an automobile is an emergency safety device that restrains the occupant and ensures safety even if impact force or acceleration acts during a vehicle collision or the like. In this type of seat belt device, a slip anchor is movably attached to the center villa etc. of the vehicle body, and the slip anchor guides the webbing of the seat belt device slidably in the longitudinal direction. are doing.

2. Description of the Related Art Conventionally, there are slip anchors of this type of seat belt device disclosed in JP-A-7-32910 and JP-A-201-840.

The former slip anchor 1 for a seat belt device has a webbing plan interior 2 as shown in FIG. 18, and the webbing guide portion 2 is formed by a webbing support portion 3 and a guide bellow portion 4. It has a guideway 5 for general use. The webbing W is slidably passed through the guide path 5, and the webbing W is turned and supported by a slip anchor.

The webbing insertion guideway 5 is composed of a straight communication guide portion 5a and curved relief portions 5b on both sides, and the guide bellows portion 4 and the webbing support portion 3 are flat and opposed to each other. Thus, a webbing guideway 5 is formed.

As shown in Fig. 19, the latter slip anchor 1A for a cylinder head device is covered with an independent guide cover 17 on the webbing extraction side of the webbing guide portion 2 so as to cover the entire anchor support portion 8. The tip of the guide cover 7 extends downward beyond the ebbing guide path 5 formed by the ebbing support portion 3 and the guide bello part 4, and is guided so as to suppress the ebbing.

In the former case, as shown in Fig. 24, the wing W which is turned and supported by the slip anchor 1 is guided through the guideway 5 for ebbing passage. When the webbing W is pulled out abruptly or the webbing is stored rapidly as shown in the figure, the webbing W guided through the webbing passage guideway 5 is turned largely by the slip anchor 1 to reverse its direction. I'm sullen. At this time, if the pulling power and the storage force of the webbing W are not the same, the webbing W is lifted by the action of a large inertial force at the slip anchor 1 and also slides in the width direction of the webbing W. In some cases, the vehicle may escape into the curved relief portion 5b of the webbing guide passage 5.

The lifting of the webbing W is suppressed by the guide bellows portion 4, and the widthwise slide shift of the webbing W is absorbed by the curved relief portion 5b formed in the machining path for the passage of the machining bing. However, at that time, the webbing W is guided in line contact with the guide bellows section 4 in the webbing width direction.

For this reason, the webbing W is bent by being in line contact with both sides of the tip of the guide bellows part 4, or when the fold is formed and a tensile force is applied, the webbing W is inverted or twisted and bent. There is a fear. If the webbing W is bent and slipped into the slip anchor 1, the webbing W is bent into the webbing passage route 5 and a jamming phenomenon occurs.

If the jamming phenomenon occurs in the webbing W, the webbing W may be damaged or the belt may be broken, and the webbing W may not be stably and smoothly slid by the slip anchor 1, and the sheet belt device may be damaged. Function may be impaired.

In the case of the latter shown in FIG. 25, the slip anchor 1 for the seat belt device is provided with a guide cover 7 independent of the guide bellows portion 4 so as to cover the guideway 5 for the webbing passage of the guide guide portion 2. Since the webbing W is held down by the guide cover 7, it is possible to effectively and reliably prevent the webbing W from being twisted or bent when the webbing W is stored, but when the webbing W is pulled out. Has a problem.

When the webbing is pulled out, the guide bellows portion 4 and the machining buffing support portion 3 are flatly opposed to each other, as in the former slip anchor 1 for seat belt device, and the guide bellows portion 4 is Since the webbing W only makes line contact with the webbing W in the width direction, the webbing W may be twisted or bent.

For this reason, in the case of the latter slip anchor 1A for the seat belt device, the webbing W is twisted or bent and is inserted into the webbing guideway 5 in a state where the webbing W is twisted or bent when the vehicle is parked or the emergency webbing is withdrawn. There was a drawback that the Bing W could not be pulled out smoothly and safely.

Further, the webbing engagement sliding surface 22 is used when the webbing is pulled out and stored. Good sliding properties must be maintained at all times, but if strong impact force is applied to webbing suddenly, the sliding properties may actually cause a jamming phenomenon. For this reason, there has been a demand for a slip belt unloading force for a seat belt having a function of accurately adjusting a pulling-out direction of a webbing with respect to an acting force from any direction while maintaining a sliding property.

The present invention has been made in view of the above circumstances, and effectively and obviates the bending and twisting of webbing, reliably prevents the jamming phenomenon of webbing, and smoothly and smoothly slides webbing. An object of the present invention is to provide a slip-on force for a seat belt device that can be guided and a method for manufacturing the same.

Another object of the present invention is to provide a webbing insertion guideway that guides webbing by surface contact, prevents webbing from being bent or twisted beforehand and reliably, and does not impair the function of the seat belt device. Another object of the present invention is to provide a slip anchor for a seat belt device with further improved safety and a method for manufacturing the same.

Still another object of the present invention is to provide a slip anchor for a seat belt device and a method for manufacturing the slip anchor, which can integrally form a slip anchor by resin molding of a metal plate, improve productivity, and efficiently and inexpensively produce a slip anchor. To offer.

Another object of the present invention is to provide a slip anchor for a seatbelt device and a method for manufacturing the same, which can smoothly and smoothly guide the webbing to prevent breakage and breakage of the webbing and extend the life of the webbing. To offer.

Still another object of the present invention is to prevent the twisting, jamming, and skidding of the webbing even when a strong impact force is suddenly applied to the webbing, and to maintain the function as a seat belt device. It is an object of the present invention to provide a slip anchor for a seat belt device which can be used.

The slip anchor for a seat belt device according to the present invention, in order to solve the above-described problem, as described in claim 1, mold-molding a resin coating material on a metal plate to produce a slip anchor, This slip anchor is a slip anchor for a seat belt device in which an anchor mounting portion mounted on the vehicle body side and a ゥヱ bing guide portion provided with a ゥヱ bing guide path for guiding the slidably in a longitudinal direction thereof are integrally formed. The webbing guide section is provided with a webbing support section for slidably supporting webbing, and an eave-shaped guide perforated section bent from the webbing support section to the webbing extraction side by integral molding. The guideway for webbing was formed between the guide bellows. Further, in order to solve the above-mentioned problem, a slip anchor for a seat belt device according to the present invention is configured such that, as set forth in claim 2, the webbing support portion has a circular cross section facing a webbing communication guideway. An arc-shaped webbing engagement slide surface is formed, and this webbing engagement slide surface has a cross-sectional radius of curvature of 8 mn! In addition, as described in claim 3, the guide perforator portion has a front end surface side formed on an arcuate curved surface, and a front end rear surface side formed on a plate-shaped guide surface. While the connection is made with a smooth continuous surface from the guide surface to the arcuate curved surface, the extension of the plate-like guide surface of the guide bellows is circumscribed on or near the webbing engagement sliding surface on the webbing extraction side of the webbing support portion. As described in claim 4, the guide tongue is partially formed on the top surface of the webbing engaging sliding surface of the webbing support portion when the slip anchor is mounted on the vehicle body side. The guide extends through the guide bellows and terminates near the horizontal plane, and is formed between the guide bellows section and the webbing support section. And it has a chance. Further, in order to solve the above-mentioned problem, a slip anchor for a seat belt device according to the present invention, as described in claim 5, wherein the webbing guide path of the webbing guide section has a webbing width. It has a corresponding linear guide portion and an arc-shaped curved relief portion that rises smoothly from both ends of the linear guide portion, and the webbing support portion extends from the linear guide portion to the curved portion of the curved relief portion. Or a curved area formed on both sides of the webbing insertion guideway, as described in claim 6, wherein the arc-shaped curved section is formed as an arc-shaped curved section. A webbing support portion corresponding to the arc-shaped curved portion so that the radius of curvature of the arc-shaped cross section gradually decreases from the straight guide portion to the straight portion. In the straight part of the curved relief part, the semi-circular cross section from the curved part is smoothly continued, while the guide bellows part corresponding to the above-mentioned linear part has the curvature radius on the tip side of the plate-shaped guide surface of the curved relief part. It is formed so as to gradually increase from the curved portion toward the base end side, and further, as described in claim 7, the webbing guide portion corresponds to a linear guide portion of a webbing passage guide path. A slip plate is mounted on the webbing support portion, and a webbing engagement sliding surface having an arc-shaped cross section is formed by the slip plate.

Further, in order to solve the above-mentioned problem, the slip plate for a seat belt according to the present invention is configured such that, as set forth in claim 8, the slip plate is formed of a spring member having a large elastic coefficient. In addition, as set forth in claim 9, the anti-skid means is provided on the slip plate at two locations symmetrically to the left and right, and is a long hole extending in an arc-shaped direction. As mentioned, the anti-skid means comprises: The lip plate may be provided symmetrically at one location at a time, and may be a long hole extending in an arc direction. It is a long hole formed in the hole.

On the other hand, in order to solve the above-mentioned problems, the method for manufacturing a slip anchor according to the present invention comprises: forming a metal plate by press-forming a strip-shaped steel plate; At the time of press forming, the plate mounting portion of the metal plate and the anchor guide portion are bent at a required angle, and the plate bellows portion is further bent at the required angle from the anchor guide portion, and then the bent metal plate is bent. This is a method of manufacturing a slip anchor by applying a resin coating material to the resin by molding.

Furthermore, in order to solve the above-mentioned problem, a method of manufacturing a slip anchor according to the present invention, as described in claim 13, includes: In this method, at least a webbing engaging side edge of the through hole is bulged to both sides to form an arc-shaped bulge.

On the other hand, a slip anchor for a seat belt device according to the present invention, in order to solve the above-described problem, as described in claim 14, forms a slip anchor by molding a resin coating material on a metal plate. This slip anchor is a slip anchor for a seat belt device in which an anchor attachment portion attached to a vehicle body side and a ゥヱ bing guide portion having a 揷 bing passage guide path for guiding ゥ bing slidably in its longitudinal direction are integrally formed. The webbing guide portion is formed integrally with a webbing support portion that slidably supports the webbing, and an eave-shaped plate bellow portion of a metal plate bent to the webbing extraction side of the webbing support portion. A guide cover is attached to the bellows with one touch to form a part of the guide A webbing passing guideway is formed between the dovelow portion and the webbing support portion, and the webbing support portion forms a webbing engagement sliding surface having a cross-sectional arc shape facing the webbing passing guideway. . Simple explanation of the drawing

Figure 1 is a perspective view _c Figure 2 showing a first embodiment of a seat belt Sri Ppuanka according to the present invention, a front view _c show a first embodiment of a sheet one seatbelt slip anchor according to the present invention Fig. 3 is a cross-sectional view of the slip anchor shown in Fig. 2 along the line III-III.

FIG. 4 is a development view of a slip plate in a second embodiment of the seat belt slip anchor according to the present invention.

FIG. 5 is a sectional view taken along the line II-II in FIG. Fig. 6 is a bottom view of the slip anchor shown in Fig. 2 as viewed from below.

FIG. 7 is a cross-sectional view of the slip anchor shown in FIG. 2 along the line VI-VI.

FIG. 8 is a cross-sectional view of the slip anchor shown in FIG. 2 taken along the line VII-VII.

FIG. 9 is a cross-sectional view of the slip anchor shown in FIG. 2 taken along the line VIII-VIII. FIG. 10 is a cross-sectional view of the slip anchor shown in FIG. 2 taken along the line IX-IX.

FIG. 11 is a front view showing a metal plate constituting the slip anchor shown in FIG. 2; FIG. 12 is a cross-sectional view of the bracket plate of FIG. 11 taken along the line XII-XII.

FIG. 13 is a side view showing a slip plate mounted on the slip anchor shown in FIG.

FIG. 14 is a view of the slip plate shown in FIG. 12 viewed from below.

FIG. 15 is a schematic view showing a procedure for mounting a slip plate on the slip anchor shown in FIG. 2.

FIG. 16 is a sectional view corresponding to FIG. 3, showing another embodiment of the seat belt slip anchor according to the present invention.

FIG. 17 is a front view showing a third embodiment of a seat belt slip anchor according to the present invention.

FIG. 18 is a developed view of a slip plate in a third embodiment of the seat belt slip anchor according to the present invention.

FIG. 19 is a development view of a slip plate in a fourth embodiment of the slip anchor for seat belt according to the present invention.

FIG. 20 is a front view showing a fifth embodiment of the seat belt slip anchor according to the present invention.

FIG. 21 shows a sixth embodiment of the seat belt slip anchor according to the present invention, and is a cross-sectional view corresponding to FIG.

FIG. 22 is a front view of a guide cover attached to the plate bellows of the slip anchor shown in FIG.

Fig. 23 is a plan view of the guide cover shown in Fig. 16 (A), and (B) is a rear view of the guide cover.

FIG. 24 is a perspective view showing the entirety of a conventional slip anchor for a seat belt device.

FIG. 25 is a cross-sectional view showing another example of a conventional slip anchor for seatbelt mounting.

[Explanation of symbols]

1 0… Slip anchor, 1 1… Mounting plate, 1 2… Anchor mounting part, 1 3… Pot bottle Guide part, 14… Resin coating material, 15… Bolt mounting hole, 16… Bing support part, 17—Guide bellow part, 17a… Arc curved surface, 17b… Plate guide surface , 18 ... ebbing guideway, 19 ... recess, 20 ... penetration guide, 21 a, 21 b ... curved relief, 22 ... ... sliding surface for bing, 23 ... Plate, 24 ... webbing engagement guide surface, 25 ... anti-slip means, 26 ... plate mounting part, 27 ... anchor guide part, 28 ... bolt hole, 30 ... webbing support part, 3 1 ... Plate bellows, 32 ... Bing hole, 33: Communication guide, 34a, 34b: Curved relief, 36: Arc-shaped bulge, 37: Molded hole, 3 9 ... resin coating material, 40 ... plate body, 4 1 ... locking part, 4 3 ... inner bent part, 4 4 ... circumferential groove, 50 ... guide cover, 5 1 ... storage space, 5 2 ... Cover body, 5 3 ... locking protrusion. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of a slip anchor for a seat belt device according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an overall perspective view showing a first embodiment of a slip anchor for a seat belt device according to the present invention.

The slip anchor 10 is rotatably mounted on the vehicle body side of the vehicle, for example, directly on a center pillar of the vehicle body, or via a shoulder adjuster device (not shown). The slip anchor 10 is resin-molded by press-molding a metal plate 11 using a resin coating material 14 to be resin-coated and integrally formed. The shoulder adjuster device supports the slip anchor 10 so as to be able to move up and down, and for example, there is a device disclosed in Japanese Patent Application Laid-Open No. Hei 5-292408. .

Slip anchor 10 has an anchor width of 75 m rt! An anchor mounting part 12 formed to be about 85 mm, preferably about 80 mm, and rotatably mounted on the vehicle body side of the vehicle, and a webbing guide part 1 integrally formed with the anchor mounting part 12. With 3. The anchor attachment portion 12 and the webbing guide portion 13 are bent at a required angle α in a V-shape at a boundary of the bending curve FL in the width direction.

The anchor mounting portion 12 of the slip anchor 10 has a bolt mounting hole 15 for guiding a mounting bolt or the like so that it can be freely passed therethrough. The slip anchor 10 is connected to the vehicle body through the bolt mounting hole 15. Directly or indirectly rotatably attached to the.

In addition, the webbing guide portion 13 of the slip anchor 10 integrally has the webbing support portion 16 and the eave-shaped guide hole part 17 at a required angle j3, for example, an angle of 30 degrees. This ゥ Between the webbing supporting portion 16 and the guide bellows portion 17, a webbing passing guideway 18 for slidably passing webbing W is formed.

As shown in FIG. 2, the guide passage 18 for the passage has a guide guide 20 which is a linear guide, and a smooth arc-shaped or curved shape from both ends of the guide guide 20. It has rising relief portions 21a and 21b. The curved relief portions 21 a and 21 b have a curved portion extending from the through guide portion 20 and a straight portion extending from the curved portion, and the straight portion is on the base end side of the guide bellow portion 17. It is terminated in the middle of the extension.

As shown in Fig. 3, the outer peripheral side of the bellows tip of the guide bellows portion 7 is formed into an arcuate curved surface 17a having a radius of curvature of about several mm, for example, 5 mm, or an arcuate or smooth curved surface. The back side is formed on a flat plate-like guide surface 17b of the webbing W. The plate shape is continuously and smoothly connected from the inner surface 17b to the arcuate curved surface 17a via a curved surface having a small radius of curvature, for example, about lmm to 2mm.

On the other hand, the webbing support portion 16 of the webbing guide portion 13 is formed in a U-shape so as to surround the guide bellows portion 17, and the wide arcuate webbing engagement sliding surface 22 is formed as shown in FIGS. It is formed upward in the figure. The webbing 'engagement sliding surface 22 is formed not only in the straight guide portion 20 but also in the curved portions of the curved relief portions 2 la and 21 b. The webbing-engaging sliding surface 22 is formed by winding the arc-shaped cross section of the webbing support portion 16 with the slip plate 23, assembling and covering it. The slip plate 23 is a spring plate having a large elastic coefficient, and the slip plate 23 covers a linear portion of the webbing supporting portion 16 having an arc-shaped cross section. The slip plate 23 has both ends of the trailing wedge and the leading edge hooked to the ergo of the webbing support 16, and is integrally mounted on the webbing support 16.ゥヱ Bing engagement sliding surface 2 2 has a radius of curvature of 8 mn! The webbing W, which is formed into a curved shape of about 1 O mm, for example, 9 mm, is guided along the webbing passage guideway 18 and is reversed in direction, smoothly supports the webbing W with a large contact area, and freely slides. Has been improved.

The slip plate 23 is provided with anti-skid means 25. In the first embodiment shown in FIGS. 1 and 2, as the anti-slip means 25, an elongated hole 25a extending in the circumferential direction (arc-shaped direction) of the slip plate 23 is provided. FIG. 4 shows a developed view of the slip plate 23. The slip plate 23 is formed by bending a plate-like member shown in FIG. 4 in accordance with the radius of curvature of the webbing support 16. The elongated hole 25a has a function as a side slip prevention means 25, and has a function of regulating the side slip in the width direction of the webbing W and adjusting the sliding direction. FIG. 5 shows a cross-sectional shape along the line II-II in FIG. As shown in FIG. 5, the outer peripheral edge 23 a of the elongated hole 25 a has the same shape as the elongated hole 25 a provided at a location corresponding to the elongated hole 25 a of the webbing support portion 16. It is bent so as to engage with a concave portion 19 having a depth of about 1 to 5 mm.

As the anti-slip means 25 of the slip plate 23, in addition to the elongated hole shape as described above, a curved surface shape having a concave vertical groove in the circumferential direction may be used. Further, the slip plate 23 may be embossed. The belt is formed in the circumferential direction and has a directional curved surface with irregularities, so that the slidability with the webbing W has an orientation for emergencies to prevent sideslip. May be.

As shown in FIG. 3, the working bing W guided and inserted into the webbing insertion guideway 18 comes into sliding contact with the webbing engaging sliding surface 22 of the webbing support portion 16 as shown in FIG. The webbing W is slid with a large contact area with the sliding surface 22 of the webbing engagement.

The webbing W is a woven belt having a width of about 5 Om m stipulated by Japanese Industrial Standards, for example, a width of 47 mm, and is formed to a thickness of about 1.2 mm to 1.5 mm and less than 2 mm. In order for the webbing W to be smoothly guided on the webbing guideway 18, the guideway 18 is provided between the tip of the guide bellows 17 and the webbing engagement sliding surface 22. It is formed in a gap larger than the thickness. The minimum gap of the guide passage 18 for the passage is formed to be larger than the thickness of the passage W, for example, 1.2 times or more and 2 times or less.

The plate-shaped guide surface 17 b on the back side of the guide hole part 17 is inclined like an eave from the webbing support 16 to the webbing withdrawal side, and is an extension of the plate-shaped guide surface 17 b. 3 extends substantially so as to circumscribe the webbing-engaging sliding surface 22 as shown in FIG. 3 or so as to approach the webbing-engaging sliding surface 22. The guide bellows portion 17 is formed integrally with the anchor attachment portion 12 and the webbing support portion 18.

The slip anchor 10 has an angle between the anchor mounting portion 12 and the webbing guide portion 13 of about 15 to 25 degrees, preferably about 20 degrees, and is a webbing guide portion 13. The angle [3] formed by the webbing support portion 16 and the guide bellows portion 1 [deg.] Is about 20 to 40 degrees, and preferably about 30 degrees. The guide holes 1 and 7 are attached to the webbing support 16 from the webbing support section 16 at an angle to the webbing W draw-out side so that they can slide smoothly when the webbing W is pulled out or stored. I'm doing it. In this slip anchor 10, the guide bellows portion 17 is formed by integral molding so as to protrude greatly from the anchor mounting portion 12 toward the webbing pull-out side. The tip of the guide bellows 17 has a small radius of curvature, for example, lm The rear plate-shaped guide surface 17b is continuous with the front-side arcuate curved surface 17a via a curved portion of about m to 2 mm. The tip of the guide bellows portion 17 terminates near the horizontal plane formed on the top surface of the webbing engagement sliding surface 22, and removal of a molding die for integral molding is considered.

Next, the operation of the seat belt slip anchor 10 according to the present invention will be described.

By the webbing guide structure formed by the webbing support portion 16 formed in the webbing guide portion 13 and the guide bellows portion 17, the webbing W passed through the webbing passage guideway 18 becomes the webbing support portion 16. Smooth arc-shaped ribs are guided in contact with the sliding surface 22 with a large contact area. The opposite side of the webbing W from the guide support surface contacts the plate-shaped guide surface 17 b of the guide tongue part 17 and is held down and guided.

At this time, even if the webbing W that is guided on the webbing guideway 18 rises for some reason, the webbing W is prevented from rising by the plate-shaped guide surface 17 b of the guide bello part 17. While being guided in a surface contact state, the webbing W can be effectively and prevented from being twisted or bent, and the webbing W can be effectively bent by the guide bellows 17. Can be prevented.

Even when the webbing W is lifted for some reason during the winding of the webbing W, the webbing W comes into smooth surface contact with the arcuate curved surface 17 a of the guide bellows portion 17, and the webbing W is twisted or twisted. Bending can be effectively prevented.

FIG. 6 is a bottom view of the webbing support section 16 when the slip anchor 10 is viewed from below in FIG. 2, and FIG. 7 is a cross-sectional view of the webbing support section 16 along the line VII-VII in FIG. It is a figure. As shown in FIGS. 6 and 7, the webbing support portion 16 of the slip anchor 10 has a lateral width of, for example, 85 mm and an arc-shaped portion of, for example, about 16 mm to 20 mm, for example, 18 mm. It is formed to have a wide width.

FIG. 8 is a cross-sectional view taken along the line VIII-VIII of FIG. 2, FIG. 9 is a flat cross-section taken along the line IX—IX of FIG. 2, and FIG. It is a plane sectional view along a line. As can be seen from FIGS. 9 and 10, the webbing support portion 16 of the slip anchor 10 is curved from both ends of the insertion guide portion 20 which is a linear guide portion to the curved relief portion 21a. The radius of curvature of the webbing engagement guide surface 24 is gradually reduced, and the radius of curvature of the webbing support portion 16 is linear near the boundary between the curved portion of the curved relief portion 21a and the linear portion. It is about half of the insertion guide part 20 (see Fig. 9), and smoothly continues in the straight part following the curved part of the curved relief part 21a, and is supported by webbing on the base end side of the curved relief part 21a. The radius of curvature of the part 16 is about one-third less than half of the straight insertion guide part 20 (see Fig. 10). See).

In addition, the guide bellows 17 of the webbing guide 13 are curved from the through guide 20 where the radius of curvature of the arcuate curved surface 17 b at the free end side tip is a linear guide. The radius of the curve at the tip of the guide bellows 17 is straight from the boundary with the curved portion to the proximal side at the base end of the straight portion of the curved relief 21a, although it does not change over the curved portion of the relief portion 21a. The radius of curvature of the tip corresponding to the shape guide 20 is about 1 mm to 2 mm to about several times, for example, 5 mπ! It gradually increases to about 6 mm.

Thus, as shown in FIGS. 8 to 10, the webbing guide 13 changes the radius of curvature of the webbing support 16 and the radius of curvature of the guide bellows 17 along the curved relief 21 a. Therefore, even if the webbing W slides in the width direction for some reason and enters the curved relief portion 21a, the contact surface pressure received by the webbing W from the webbing support portion 16 and the guide bellows portion 17 is applied to the webbing width direction. The pressure can be substantially equalized throughout. The same applies to the case where the webbing W enters the bend escape section 21b. By adopting a surface equalizing contact structure that equalizes the surface pressure in the width direction of the webbing W, even if the webbing W shifts in the width direction and enters the curved relief portion 21a, the surface pressure in the width direction of the webbing W is reduced. Since the webbing is substantially uniform in the width direction, the webbing W can be effectively prevented from being bent or twisted, and the webbing W can be effectively prevented from being bent.

In addition, the slip anchor 10 is provided with the curved relief 21a and the curved relief 21b to improve the impact absorbing effect when the impact is applied.

In other words, the waving support portions 16 corresponding to the arc-shaped curved portions of the curved relief portions 21a and 21b are circular from the straight guide portion 20 to the straight guide portion. The curved cross section is formed so that the radius of curvature of the cross section becomes gradually smaller, and the straight portions of the curved relief portion 21a and the curved relief portion 21b are formed by smoothly continuing the semicircular cross section from the curved portion. The guide bellows section 17 corresponding to the section is formed so that the radius of curvature at the distal end of the plate-shaped guide surface gradually increases from the curved sections of the curved relief section 21a and the curved relief section 21b toward the base end. Has been done.

The slip anchor 10 provided with the curved relief 21a and the curved relief 21b having such a structure stably holds the webbing W by the following operation at the time of impact. In other words, when a load acts on the webbing W, a tensile force acts on the slip anchor 10. At this time, the curved relief 21 a and the curved relief 21 having the above-described structure are used. By providing b, the curved relief 21 a and the vicinity of the curved relief 21 b are elastically deformed to absorb the impact. On the other hand, the webbing engagement sliding surface 22 has high rigidity. As a result, deformation of the webbing engagement sliding surface 22 is prevented. That is, even when a large impact force acts instantaneously on the slip anchor 10, a problem does not occur in which the slip plate 23 comes off the weaving support 16. Therefore, the slidability of the webbing W is always kept in a good condition, and it is possible to maintain stable safety performance as a seat belt device.

The slip anchor 10 has a large contact area of the webbing support 16 by adopting a webbing equalizing contact structure of the webbing W in the webbing support 16 and the guide bellows 17. With the webbing support structure and the surface contact guide structure of the eave-shaped guide bellows portion 17 with the plate-shaped guide surface 17b, it is possible to effectively and more reliably prevent the webbing W from bending or twisting. Therefore, the webbing W is slidably guided in the longitudinal direction along the webbing insertion guideway 18 of the slip anchor 10 and supported. The webbing W is rotatably supported so that the direction is reversed along the webbing communication guideway 18.

When the webbing W slides on the slip plate 23, the anti-skid means 25 prevents the sideways slippage of the webbing W in the width direction and exerts an action force for adjusting the sliding direction. Therefore, even when a strong impact is suddenly applied to the webbing W in an emergency, the sliding property of the webbing W is maintained, so that the phenomenon that the webbing W slides in the width direction and enters the curved relief 21a. To prevent. Therefore, since the jamming phenomenon does not occur, the safety performance as the seat belt device can be further improved.

Next, a method of manufacturing the slip anchor 10 for the seat belt device will be described.

When manufacturing the slip anchor 10 for the seat belt device, a strip-shaped steel plate is prepared in advance. As the strip-shaped steel sheet, a steel sheet having a thickness of about 3 mm to 4 mm, for example, 3.2 mm thick is used. The metal plate 11 shown in FIGS. 11 and 12 is press-formed by a press machine such as a press machine disclosed in JP-A-8-188117, for example. Body molding.

The metal fitting plate 11 is formed by integrally bending the plate mounting part 26 and the anchor guide part 27 via the folding curve FL at a required angle 0: for example, about 20 degrees. The plate mounting portion 26 has a bolt insertion hole 28 at the center.

Further, the anchor guide portion 27 of the metal plate 11 is integrally formed with the webbing support portion 30 and the plate bellow portion 31, and is formed between the webbing support portion 30 and the plate tongue portion 31. A working hole 32 is formed. The webbing passage hole 32 is formed with a straight passage guide portion 33 and a curved relief portion which rises in an arc shape or a smooth curved shape from both ends of the passage guide portion 33. b. At least a webbing engaging side edge is raised on the left and right sides of the bracket plate 11 in the webbing through-hole 32 of the anchor guide portion 27 to form an arc-shaped bulged portion 36 having a cross-sectional shape. At least the arc-shaped bulging portion 36 formed at the edge of the webbing engaging side of the webbing through hole 32 is a press machine disclosed in the above-mentioned Japanese Patent Application Laid-open No. Hei 8-18817. Formed during press forming. When the slip plate 23 is attached to the webbing support portion 16 of the slip anchor 10 and attached, it is not always necessary to form the arc-shaped bulge portion 36.

The metal plate 11 bulges, for example, three webbing-engagement-side edges of the webbing through-hole 3 2 excluding the webbing non-engagement side to both sides of the plate, and the arc-shaped bulge 36 becomes the edge. By forming, the metal plate 11 can have a reinforcing structure, and the rigidity can be increased. In addition, when the metal plate 11 having the arc-shaped bulges 36 formed thereon is coated with a resin by resin molding, the contact area with the resin coating material 14 can be increased when the slip anchor 10 is manufactured. The resin coating can be stably and firmly applied.

By using the slip anchor 10 coated with the resin coating material 39 as it is for many years, even if the resin coating is damaged, the webbing W will come into contact with the arc-shaped bulging portion 36. The surface contact structure does not contact the sharp corners of the metal plate 11, so that the webbing W is less likely to be damaged.

The plate bellows 31 of the metal plate 11 is bent at a required angle from the webbing support 30], for example, at an angle of 20 ° to 30 °, and a molding hole 37 at the center. Are drilled as window holes. The forming hole 37, the bolt through hole 28, the webbing through hole 32, and the arc-shaped bulging portion 36 are all formed during press forming.

As described above, the metal plate 11 is formed from the strip-shaped steel plate by press forming such as punching with a press device, and the formed metal plate 11 is set in a molding die during resin molding. The molten resin coating material 14 is injected into the mold in which the metal plate 11 is set and injection molded to produce the slip anchor 10 shown in FIGS. 1 and 2. You.

In the manufactured slip anchor 10, the resin coating material 14 wraps around the front side and the back side of the tongue-shaped plate bellows portion 3 through the molding hole 37 of the plate tongue part 31, so that樹脂 The resin molded product molded with the resin coating material 14 has a strong fixed structure, and can be integrated with the plate tongue part 3.

A slip plate 23 is assembled and mounted as needed on a slip anchor 10 manufactured by molding a resin coating material 14 on a metal plate 11 in a mold. As shown in Figs. 13 and 14, the slip plate 23 is a spring member with a large elastic modulus. To form a substantially semi-cylindrical shape as a whole.

The slip plate 23 is formed of, for example, a ferritic stainless steel material, but may be formed of a metal spring material having an appropriate spring coefficient. For stainless steel plates, the processing accuracy is improved by rolling mills that repeat rolling, and the processing accuracy is improved to about 420 to 430 with the hardness of pickers to provide springiness. Can be.

The long hole 25 a as the anti-slip means 25 is formed by simultaneously drilling and forming the slip plate 23.

At this time, the outer peripheral edge 23 a of the elongated hole 25 a is subjected to bending at the same time as drilling to form a smooth curved shape toward the back surface of the slip plate, that is, the slip anchor mounting surface side. (See Fig. 5). By this bending, the outer peripheral portion 23a is formed, and the catch or damage of the wing W is prevented.

In addition, the longitudinal grooves extending in the circumferential direction may be formed in rows in the longitudinal direction, or the lateral grooves extending in the longitudinal direction may be formed in rows in the circumferential direction. Further, it is possible to appropriately adjust the slip property of the slip plate 23 by performing an embossing process on the slip plate 23 to form an uneven surface. .

The slip plates 2 and 3 are then bent to form the plate body 40 into an arc of a required shape, and the leading edge of the slip plate 23 and the trailing wedge are bent inward to engage. A stop 41 is formed. Engagement portions 41 are formed at the front and rear ends of the slip plate 23, and both sides of the plate are bent inward, and the inside bent portion 43 is formed on the webbing support portion 16 of the slip anchor 10. It is engaged with the circumferential groove 4 4. The axial length of the slip plate 23 is set to a value corresponding to the width of the webbing W.

The surface of the slip plate 23 is provided with metal plating such as chrome plating.

Thus, the slip plate 23 is attached to the machining support 16 of the slip anchor 10 as shown in FIG. The mounting of the slip plate 23 to the live support 16 is performed as shown in FIG.

The retaining portion 41 on the trailing edge side of the slip plate 23 made of spring material is pressed against one jaw 16 a of the webbing support portion 16 by the pressing roller 46 to be held. While holding down the trailing edge side of the slip plate 23 with the holding roller 46 and holding it, the locking part 41 on the leading edge side of the slip plate 23 is fixed with the hook member 47 made of spring material. Hook and pull so that it wraps around the webbing support 16. The leading edge of the slip plate 23 is hooked with the hook member 4 7 to the arc surface of the webbing support 16. After pulling the hook member 47 along with the jaw 16 b on the other side of the webbing support 16, the slip plate 23 is manually or automatically pulled to the arc surface side of the webbing support 16 while pulling out the hook member 47. Forcefully. Due to the pressing force, the locking portion 41 of the leading edge 当 comes into contact with the jaw 16 b on the other side of the ビング -bing support portion 16 by the spring force of the slip plate 23, and is locked. The tip plate 23 is firmly mounted and fixed to the machining support portion 16 of the slip anchor 10 by a spring action.

With the slip plate 23 attached to the slip anchor 10, the locking portions 41 at the front and rear ends of the slip plate 23 are engaged with the jaws 16 a and 16 b of the webbing support 16. The inner bent portions 43, 43 formed on both sides of the slip plate 23 engage with the corresponding circumferential grooves 44, 44 of the webbing support portion 16, while being locked together. By this engagement, the slip plate 23 is stably mounted on the webbing support portion 16, and in this mounted state, the stable smooth machining engagement sliding surface 22 on the webbing support portion 16 is provided. It is formed.

The slip anchor 10 manufactured in this manner is rotatably mounted directly or via a shoulder adjustment device on the vehicle body side of the vehicle. The slip anchor 10 is rotatably attached to, for example, a center pillar of the vehicle, and the webbing W drawn out from the retractor of the seat belt device (not shown) is used as shown in FIG. The webbing is passed through the guide passage 18 and is slidably supported.

The webbing W guided through the webbing guideway 18 of the slip anchor 10 is drawn out to the webbing extraction side, and is attached to the buckle (not shown) mounted on the vehicle body side by the tongue plate attached to the tip of the webbing W. It is detachably attached with one touch.

When the occupant in the vehicle uses the seat belt device, the turning angle y of the machining bing W passed through the slip anchor 10 is, for example, 40 to 50 degrees when set, specifically, 45 degrees. It is set within 80 degrees during normal operation. In other words, during the normal operation of the webbing W, the angle γ between the webbing extraction side and the webbing storage side of the slip anchor 10 is set within 80 degrees.

However, in an emergency such as a vehicle collision, the turning angle γ of the webbing W becomes large and may reach about 108 ° to 120 ° at the moment of the collision. For this reason, the slip angle of the slip anchor 10 is set to ma X 135 degrees at the moment of the collision, so that sufficient anchor strength can be obtained even in an emergency such as a vehicle collision. The slip anchor 10 is designed to provide sufficient mechanical and physical strength even when the turning angle is max.

Also, in the slip anchor 10, the webbing support 16 of the webbing guide 13 is not directly opposed to the part of the guide bevel 7, and the plate-shaped guide surface of the part of the guide bevel 17 is not provided. The extension line of 17 a is formed so as to substantially circumscribe the webbing engagement sliding surface 22 of the webbing support portion 16, and a part of the guide hole 17 is inclined from the webbing support portion 16 to the webbing removal side. It is provided and provided in the shape of an eave.

On the other hand, the webbing supporting portion 16 has a wide webbing engagement sliding surface 22, and the webbing W is stably supported by the webbing engagement sliding surface 22 with a large contact area. The webbing support structure of the water vehicle support portion 16 and the surface contact structure with the webbing W by the plate-like guide surface 17a of the guide bellows portion 17 prevent the webbing W from being twisted or bent. Guidance can be provided stably and smoothly.

Furthermore, since the anti-skid means 25 is provided on the webbing support 16, even if a sudden impact force is applied to the webbing W, the webbing W may not bend or twist due to a high guide effect. Prevents jamming.

Therefore, in the slip anchor 10, the webbing W is effectively prevented from being bent or twisted, and the webbing W is guided stably and smoothly freely in the longitudinal direction. The webbing W can be effectively and proactively prevented from being damaged or worn, and the webbing W can be prevented from being damaged or the belt is broken, and the webbing W can have a longer life.

Variations of the anti-slip means 25 in the seat belt slip anchor 10 according to the present invention will be exemplified in the following embodiments.

FIG. 16 shows a second embodiment in which the anti-skid means 25 is disposed at one position on each of the left and right sides, and has an elongated hole 25b extending in the circumferential direction (arc-shaped direction). The second embodiment is different from the first embodiment in that two long holes 25a on the left and right sides are replaced with one long hole 25b, respectively. Is omitted from the drawing.

Also, as in the third embodiment shown in FIGS. 17 and 18, a combination of a diamond-shaped slot 25c long in the circumferential direction of the slip plate 23 and a triangular slot 25d is used. Side slip prevention means 25 may be configured.

Further, as in the fourth embodiment shown in FIG. 19, a plurality of rows of rhombic elongated holes 25 f arranged in a chain in the circumferential direction of the slip plate 23 are formed in a plurality of rows to form the sideslip prevention means 2. 5 may be configured. In order to prevent the webbing W from sliding in the width direction, various anti-skid means are conceivable.

When the anti-skid means 25 is not required, the slip plate 23 may be formed of a flat plate without the anti-skid means 25 as in the fifth embodiment shown in FIG.

The webbing engaging sliding surface 22 is replaced by a webbing instead of being formed by a slip plate 23. The resin coating material of the support portion 16 may be directly exposed and formed on the exposed surface.

The long holes as the side slip prevention means 25 described above may be arbitrarily determined in shape, number, and the like. For example, the long holes may be provided only in the center of the slip plate 23 in the width direction. Or it may be asymmetrical. According to the study of the present inventors, there are provided two slots symmetrically with two long holes 25a as in the first embodiment shown in FIG. 2, and the third embodiment shown in FIG. The anti-slip means 25 formed into a diamond-shaped long hole 25c and a triangular long hole 25d as described above has particularly good guide performance, and has a high effect of orienting the webbing W in the sliding direction. . Therefore, even at the time of impact resistance, the webbing is well guided and no twisting or bending occurs.

Next, another embodiment of the slip anchor for a seat belt device according to the present invention will be described with reference to the accompanying drawings.

The slip anchor 1OA shown in the sixth embodiment has the anchor structure shown in FIG. 21 to FIG. This slip anchor 1OA exposes the plate bellows 3 1 to the outside without partially resin-molding the plate bellows 3 1 of the metal plate 11 and removes the portion excluding the plate bellows 3 1. Let it be molded.

Then, using a molding hole 37, the guide cover 50 is attached with a one-touch to the part 31 of the plate anchor 31 of the slip anchor 10A to form a guide bellows portion 17. In the guide cover 50, a flat storage space 51 for storing the plate bellows 31 is formed in the cover main body 52, and the cover main body 52 is inserted from the free end side of the plate bellows 31. The guide cover 50 is formed by engaging the pair of locking projections 5 3, 53 projecting into the storage chamber 51 of the force bar body 52 with the forming holes 37 of the plate bellows portion 31 and locking them. Be attached. Attach the guide cover 50 to the part of the slipper 10 A plate tongue 31 so that the cover 50 covers it, and attach the locking projections 5 3, 53 of the guide cover 50 to the plate bellows 3 1 forming holes 3 7 The guide cover 50 can be stably mounted with one touch by engaging and locking the guide bellows, and the guide bellows portion 17 can be configured.

The guide cover 50 attached to the plate tongue part 31 can extend the tip end to the side of the webbing engagement sliding surface 22 of the webbing support part 16 and the length of its free end Can be set as appropriate.

Further, the front surface side of the guide cover 50 of the guide bellows section 12 is formed into an arcuate curved surface 50a and the rear side of the guide portion is formed as a plate-shaped guide surface 51b, as shown in the first embodiment. The same operation and effect as those of the above can be obtained.

At this time, the guide cover 50 is attached to the guide bellows 17 shown in Figs. 1 to 3. Therefore, the guide of the webbing W can be made more stable and smooth.

The other configuration of the slip anchor 1.0A is not different from the slip anchor 10 shown in FIGS. 1 to 3, and the same members are denoted by the same reference numerals and description thereof will be omitted. Industrial applicability

In the method of manufacturing the slip anchor for the seat belt device according to the present invention, the webbing guide path formed in the webbing guide portion guides the webbing slidably by making the webbing come into surface contact with the webbing so that the webbing is bent. The twisting is prevented beforehand and surely, the jamming phenomenon of the webbing is prevented, the webbing can be slid smoothly and smoothly, and the function of the seat belt device can be sufficiently maintained without being damaged.

Further, in the slip anchor for a seat belt device and the method of manufacturing the same according to the present invention, a slip anchor is manufactured by integrally molding a metal plate by resin molding, and a guide bellow is provided on the slipping anchor at the side of the slipping-out at the time of manufacturing. Since the part can be bent at the required angle from the webbing support part and formed integrally in an eaves shape, productivity can be increased, slip anchors can be manufactured efficiently and inexpensively, and the eaves-shaped guide surface and arcuate curved surface of the eaves-shaped guide bellows are used. The lifting of the spring can be pressed down by surface contact to guide the sliding, so that the webbing can be effectively prevented from being bent or twisted, and the webbing jamming phenomenon can be effectively prevented. Damage to ゥヱ bings Prevents ゃゥヱ bings from running out of belt and extends the life of ゥ bings. .

Furthermore, according to the slip anchor for a seat belt and the method of manufacturing the same according to the present invention, the slip plate mounted on the webbing engagement sliding surface is provided with a long hole by a piercing method as a side slip prevention means, so that it is resistant to webbing. Even if an impact force is applied, the webbing does not twist, jam, or skid, so there is no hindrance to webbing sliding, and the safety of the seat belt device is not impaired, and safety can be improved. it can. Further, in the slip anchor for a seat belt according to the present invention, even when a large impact acts instantaneously on the slip anchor, the vicinity of the curved relief portion is elastically deformed and absorbs the impact. The deformation of the webbing engagement sliding surface is prevented. Therefore, there is no problem that the slip plate comes off the webbing support portion. Therefore, since the slidability of the webbing is always kept good, it is possible to maintain stable safety performance as a seat belt device.

Claims

A slip anchor is manufactured by molding a resin coating material on a metal plate, and the slip anchor is an anchor mounting portion to be mounted on a vehicle body side and a webbing for guiding webbing slidably in the longitudinal direction thereof. In a slip anchor for a sheet-pelt device integrally formed with a webbing guide section having a guide path, the webbing guide section includes a webbing support section that slidably supports the webbing, and a webbing extraction side from the webbing support section. And a guide bellows section formed integrally with the eaves support section and a part of the guide bevel opening. . The webbing support portion forms a webbing engagement sliding surface having an arc-shaped cross section facing the webbing insertion guideway, and the webbing engagement slide surface has a radius of curvature of the cross section of 8 mm. 2. The slip anchor for a seat belt device according to claim 1, wherein the thickness is in a range of 1 mm to 1 O mm. In the guide bellows, the front surface side is formed into an arcuate curved surface, and the rear surface side is formed into a plate-shaped guide surface. 2. The method according to claim 1, wherein the extension of the plate-shaped guide surface of a part of the guide tongue is formed so as to circumscribe or pass the vicinity of the webbing engagement sliding surface on the side of the webbing support portion where the webbing is pulled out. Slip anchor for seat belt device. The guide bellows extends and terminates near a horizontal plane passing through the top surface of the webbing engagement sliding surface of the webbing support portion in a state where the slip anchor is mounted on the vehicle body side. 2. The slip anchor for a seat belt device according to claim 1, wherein the webbing guide path formed between the portion and the webbing support portion has a passage gap not more than twice the thickness of the webbing. The webbing guide path of the webbing guide section has a linear guide section corresponding to the width of the webbing, and an arcuate curved relief section that rises up smoothly from both ends of the linear guide section. 2. The slip anchor for a seat belt device according to claim 1, wherein the webbing support portion has a semi-circular cross section in a region from the linear guide portion to the curved portion of the curved relief portion.

6. The curved relief portions formed on both sides of the webbing passage guide path have an arc-shaped curved portion and a straight portion extending from the curved portion to the base end side, and the webbing supporting portion corresponding to the arc-shaped curved portion. Is formed so that the radius of curvature of the arc-shaped cross section gradually decreases from the straight guide section to the straight section.In the straight section of the curved relief section, the semi-circular cross section from the curved section is smoothly continued from the curved section. The seatbelt according to claim 5, wherein the guide bellows portion corresponding to the straight portion is formed such that the radius of curvature on the distal end side of the plate-shaped guide surface gradually increases from the curved portion of the curved relief portion toward the base end side. Slip for device 7. The webbing guide section has a slip plate mounted on a webbing support section corresponding to the linear guide section of the webbing passage guide path, and the slip plate has an arc-shaped cross section. Bing engaging first term scope of 搢動 claims surfaces were formed or seatbelts device for Sri Ppuanka of paragraph 5, wherein. 8. The slip anchor for a seat belt according to claim 7, wherein the slip plate is formed of a spring member having a large elastic coefficient, and is provided with a side slip prevention means.

9. The slip-on force for a seat belt according to claim 8, wherein the side slip prevention means is provided on the slip plate at two locations symmetrically to the left and right, and is a long hole extending in an arc direction.

10. The slip anchor for a seat belt according to claim 8, wherein the side slip prevention means is provided on the slip plate symmetrically at one location each, and is a long hole extending in an arc direction.

11. The slip-on force for a seat belt according to any one of claims 8 to 10, wherein the side slip prevention means is an elongated hole formed in an oval, a diamond, a triangle, or a rectangle. 1 2. Press-mold a strip-shaped steel plate to form a metal plate. During press forming of the metal plate, bend the plate mounting part of the metal plate and the anchor guide at a required angle, and plate the bellows from the anchor guide. Part is bent and formed at the required angle. And manufacturing a slip anchor by applying a resin coating material to the bent metal plate by molding. 3. At the time of press forming of the metal plate, at least the webbing engaging side edge of the webbing through hole formed in the anchor guide portion is expanded to both sides to form an arc-shaped expanded portion. 13. The method for producing a slip anchor according to paragraph 12. 4.Slip anchors are manufactured by molding a resin coating material on a metal plate to manufacture a slip anchor, which is an anchor mounting part to be mounted on the vehicle body side and a webbing insertion for guiding the webbing slidably in the longitudinal direction. In a slip anchor for a seat belt device integrally formed with a webbing guide section having a guide path, the webbing guide section includes a webbing support section that slidably supports the webbing, and a webbing of the webbing support section. The eaves-shaped plate bellows part of the metal plate bent to the drawer side is integrally formed, and a guide cover is attached to the plate bellows part with one touch to form a guide bellows part, and the guide bellows part and the webbing support part are formed. A webbing insertion guide path is formed between the webbing insertion guides, and the webbing support portion is a webbing insertion guide. For a seat belt device slip anchors, characterized in that the formation of the cross circular surface arc Me Webi ring engages sliding surface facing.