JP4565957B2 - Webbing insertion member - Google Patents

Description

  The present invention relates to a webbing insertion member used in a seat belt device for protecting an occupant.

  There is a so-called three-point type of seat belt device for protecting a passenger in an automobile or the like. A general three-point seat belt has the following configuration.

  That is, one end side of the webbing is wound and accommodated in the retractor device so as to be wound and pulled out. This retractor device is fixed to the vicinity of the occupant's shoulder in the vehicle body. Further, the other end of the webbing is fixed to the floor side portion of the vehicle body. In the middle of the webbing, a shoulder anchor and a tongue are inserted. Then, with the occupant seated on the seat, the webbing is drawn from the shoulder of the occupant around the waist and around the waist, and the tongue is inserted and fixed to the buckle, so that the seat belt is worn by the occupant.

  By the way, in the above-mentioned seat belt, when the webbing is suddenly drawn or pulled out from the pretensioner mechanism due to the operation of the pretensioner mechanism or the like, the webbing moves at high speed through the shoulder anchor and the insertion hole portion of the tongue. To do. At this time, the webbing may be shifted to one side of the insertion hole.

  In order to prevent such deviation of the webbing, in Patent Document 1, a guide convex portion is provided in the vicinity of the webbing insertion hole to such an extent that movement of the webbing in the width direction can be suppressed.

JP 2002-308043

  However, in Patent Document 1, the side edge of the webbing is brought into sliding contact with the guide convex part to prevent the webbing from being displaced. For this reason, when the webbing is suddenly pulled, the side edge of the webbing comes into strong contact with the guide protrusion, and the side edge of the webbing may be worn or deteriorated.

  Then, an object of this invention is to provide the webbing insertion member which can suppress the deviation | shift of a webbing, preventing abrasion, deterioration, etc. of the side edge part of a webbing.

A first aspect of the present invention is a webbing insertion member that guides and inserts a webbing, and a main body having a fixing part that is used for fixing to the vehicle body side, and an elongated hole-like webbing insertion hole through which the webbing can be inserted And is formed on the main body portion so as to protrude from the end portion of the webbing insertion hole along the direction substantially orthogonal to the longitudinal direction on the opposite side of the fixing portion, and the webbing rides up. The protrusion part which can be slidably contacted is formed.

In addition, the said protrusion part is good to have the largest protrusion dimension on the opposite side to the said fixing | fixed part rather than the said webbing penetration hole.
Moreover, the front end side peripheral edge part on the opposite side to the said fixing | fixed part among the said protrusion parts may be formed in the rounded curved surface.
The protrusion may have a side surface directed inward in the longitudinal direction of the webbing insertion hole, and a portion from the main body portion to the side surface may be formed in a curved surface.

  Furthermore, the projecting portion may be formed of resin.

  The webbing insertion member may be formed in a plane-symmetric shape with a surface substantially orthogonal to the longitudinal direction of the webbing insertion hole interposed therebetween.

According to the first aspect of the present invention, the main body portion is formed so as to protrude from the end portion of the webbing insertion hole along the direction substantially orthogonal to the longitudinal direction on the opposite side to the fixing portion, and is formed to protrude. Since the projecting portion is formed so that the webbing is slidable so that the webbing is lifted up, if the webbing is about to pass through the webbing insertion hole, the webbing is slidably contacted with the projecting unit and the webbing piece The shift can be suppressed. At this time, unlike the prior art, since it is not necessary to bring another guide member into contact with the side edge of the webbing, it is possible to prevent wear and deterioration of the side edge of the webbing.

  In addition, if the protruding portion has a side surface directed inward in the longitudinal direction of the webbing insertion hole, and the portion from the main body portion to the side surface is formed in a curved surface, the webbing can easily ride on the protruding portion. Can do.

  Further, when the tip of the protrusion is formed in a curved surface, the webbing is not easily caught on the protrusion, and smoothly slides on the protrusion. At this time, since the webbing and the projecting portion are in surface contact with each other over a relatively large area, it is possible to effectively prevent wear of the webbing.

  Furthermore, when the protruding portion is formed of a resin, the protruding portion can be easily formed and the design flexibility is excellent.

  In addition, when the webbing insertion hole is formed in a plane-symmetrical shape with a plane substantially orthogonal to the longitudinal direction of the webbing insertion hole, for example, it can be used for a driver seat or a passenger seat, and is excellent in versatility. .

  Embodiments of the present invention will be described below. In the present embodiment, an example will be described in which a tongue plate as a webbing insertion member for inserting and guiding a webbing is applied to a three-point seat belt device used for a driver's seat or a passenger seat of a vehicle.

  FIG. 1 is an explanatory view showing a three-point seat belt device. The seat belt device 10 includes a webbing 12, a retractor device 14, a shoulder anchor 16, an anchor plate 18, and a buckle device 20.

  The webbing 12 is a band-shaped member formed of a fiber material, and has a length sufficient to be able to be drawn around the waist and the waist from the shoulder of the passenger.

  The retractor device 14 winds and houses one end of the webbing 12 so as to be wound and pulled out. The retractor device 14 is fixed to the center pillar portion in the passenger compartment. A shoulder anchor 16 is provided on the upper side of the retractor device 14. The webbing 12 is pulled out from the retractor device 14 through the shoulder anchor 16.

  The retractor device 14 is pulled in the direction in which the webbing 12 is wound up in a normal state. When the seat belt is worn, the user can pull out the webbing 12 from the retractor device 14 by hand or the like. After the seat belt is worn, the webbing 12 is wound and accommodated on the retractor device 14. .

  Further, the retractor device 14 incorporates a pretensioner mechanism and an energy absorption mechanism. Then, in the event of an emergency such as a vehicle collision, the withdrawal of the seat belt is stopped, and the webbing 12 is wound up by a predetermined length by the operation of the pretensioner mechanism, thereby firmly restraining the occupant to the seat. Thereafter, the webbing 12 is gradually drawn out by the operation of the energy absorbing mechanism to absorb the impact applied to the occupant.

  Note that the pretensioner mechanism may be provided on the anchor plate side and the webbing may be pulled on the waist side.

  The anchor plate 18 is a fixture attached to the other end of the webbing 12, and is fixed to the floor side portion of the passenger compartment by bolt fastening or the like. The other end portion of the webbing 12 is fixed to a floor side portion in the passenger compartment via the anchor plate 18.

  The buckle device 20 includes a buckle body 22 and a tongue plate 24.

  The buckle body 22 is a member that connects and fixes the tongue plate 24 so as to be engageable and disengageable.

  Here, the buckle body 22 is fixed to a floor side portion in the vehicle compartment via a fixing tool such as a bolt. By inserting the tongue plate 24 into the tip of the buckle body 22, the tongue plate 24 and the buckle body 22 are engaged and fixedly connected. In this state, when the release button 22a of the buckle body 22 is pushed, the engagement between the tongue plate 24 and the buckle body 22 is released, and both are separated.

  The tongue plate 24 is a member that guides insertion of the webbing 12. Here, the tongue plate 24 is movably disposed at an intermediate portion of the webbing 12, and is connected and fixed to the buckle body 22 so that the webbing 12 is inserted through the waist portion of the occupant. To do.

  The tongue plate 24 will be described in more detail. 2 is a plan view showing the tongue plate, FIG. 3 is a bottom view showing the tongue plate, FIG. 4 is a side view showing the tongue plate, FIG. 5 is a partial rear view showing the protruding portion of the tongue plate, and FIG. It is the VI-VI sectional view taken on the line of FIG.

  The tongue plate 24 includes a fixing portion 30 used for fixing to the vehicle body side, and a plate body portion 32 having a webbing insertion hole 33h, and is formed in a left-right symmetric shape.

  In the present embodiment, the tongue plate 24 is formed by resin molding using a substantially T-shaped plate member 26 formed of a metal material or the like as an insert member. More specifically, a substantially T-shaped plate member 26 is formed of a metal plate material or the like. An elongated hole 26ah extending in the width direction is formed in the wide portion 26a of the plate member 26. Further, a substantially rectangular engagement hole 26bh is formed in the narrow portion 26b of the plate member 26. The tongue plate 24 is formed by molding the resin portion 28 around the wide portion 26a so that the wide portion 26a of the plate member 26 is inserted.

  In the tongue plate 24, a plate body portion 32 is formed by a configuration in which a resin portion 28 is molded around the wide portion 26a. That is, the outer surface shape of the plate main body 32 includes a protrusion 38 to be described later, and is formed of resin. Further, the narrow portion 26b of the plate member 26 extends from the resin portion 28, and the fixed portion 30 is formed by the narrow portion 26b.

  The fixing portion 30 is a portion used for fixing to the vehicle body side. Here, the fixing portion 30 is formed in a plate shape having the engagement hole 26bh. When the main fixing portion 30 is inserted into the buckle main body 22, the fixing member 30 is connected and fixed to the buckle main body 22 by engaging the lock member on the buckle main body 22 side with the peripheral edge of the engagement hole 26 bh. Thereby, the tongue plate 24 is fixed to the vehicle body side via the buckle body 22.

  The plate body portion 32 is a portion that is connected to the base end side of the fixed portion 30 and is formed in a wide and flat shape. The plate main body 32 is formed with an elongated hole-shaped webbing insertion hole 33h extending in the width direction. A portion of the plate main body 32 that is on the opposite side of the fixing portion 30 with respect to the webbing insertion hole 33h is formed in an elongated rod-like hanging portion 34. Further, a portion of the plate main body portion 32 that is closer to the fixing portion 30 than the webbing insertion hole 33 h is formed in a facing portion 36 that faces the hooking portion 34.

  The webbing insertion hole 33h is formed in a hole shape through which the webbing 12 can be movably inserted. A side surface 34a facing the webbing insertion hole 33h of the hanging portion 34 is formed in a smooth cylindrical side surface shape. Further, the one surface 36a of the facing portion 36 is formed to extend on the same plane as the one surface of the hooking portion 34, and the other surface 36b of the facing portion 36 is directed in a direction away from the webbing insertion hole 33h. It is formed in the movement guide surface 36b which inclines outward. In the present embodiment, a substantially rectangular recess 36c is formed at the center in the width direction of the movement guide surface 36b. Further, the tongue plate 24 is formed in a plane-symmetrical shape with the surface passing through the central portion in the longitudinal direction of the webbing insertion hole 33h as the center.

  The webbing 12 is movably inserted into the webbing insertion hole 33h. Then, by arranging the webbing 12 so as to extend along the movement guide surface 36b, the webbing 12 smoothly moves in the webbing insertion hole 33h (see a two-dot chain line in FIG. 6). That is, the tongue plate 24 moves smoothly on the webbing 12. Further, in a state where the tongue plate 24 is connected and fixed to the buckle body 22, the webbing 12 is folded from the shoulder to the waist and the waist, and is drawn around the waist (see FIG. 1). In this state, the webbing 12 is inserted into the webbing insertion hole 33h so as to be wound around the hooking portion 34 (see the one-dot chain line in FIG. 6).

  Further, the plate main body portion 32 is formed with a pair of protruding portions 38 that can slide so that the webbing 12 rides up.

  Each protrusion 38 is configured to be slidable so that the webbing 12 rides up when the webbing 12 is about to pass through the webbing insertion hole 33h so that the webbing 12 is offset toward one end of the webbing insertion hole 33h (see FIG. 9 and FIG. 10).

  Here, the pair of projecting portions 38 are portions formed of resin on one surface side of the plate main body portion 32. More specifically, the pair of projecting portions 38 is a long convex shape extending from the end portion of the webbing insertion hole 33h toward the opposite side of the fixed portion 30 along a direction substantially orthogonal to the longitudinal direction thereof. Is formed. The protrusion dimension of the protrusion part 38 is about 4 mm, for example. Further, the pair of projecting portions 38 are formed in a plane-symmetrical shape with a surface passing through the central portion in the longitudinal direction of the webbing insertion hole 33h and substantially orthogonal to the webbing insertion hole 33h.

  Between the pair of projecting portions 38, there is an interval that is substantially the same as the width of the webbing 12. In the normal state, the webbing 12 moves through the webbing insertion hole 33 h so as to pass between the projecting portions 38. (See FIGS. 7 and 8).

  Further, as described above, each protrusion 38 is formed in a long shape extending along a direction substantially orthogonal to the longitudinal direction of the webbing insertion hole 33h, and is directed inward in the longitudinal direction of the webbing insertion hole 33h. It has a side surface 39. A corner portion 39a having a corner shape extending from one surface of the plate main body portion 32 to the side surface 39 is formed into a rounded curved surface.

  Furthermore, the front end side peripheral portion 38a of each projecting portion 38 is also rounded and formed into a rounded curved surface.

  Then, when the webbing 12 is pressed against one surface side of the plate main body 32 and tries to pass through the webbing insertion hole 33h so as to be offset toward one end side of the webbing insertion hole 33h, the webbing 12 has a curved corner portion 39a. From the side surface 39 and the distal end side peripheral edge portion 38a, it slides smoothly on the protruding portion 38. Further, the webbing 12 is smoothly slidably brought into contact with the curved distal end side peripheral portion 38a in a state where the webbing 12 rides on the protruding portion 38.

  The operation of the tongue plate 24 configured as described above will be described.

  First, as shown in FIGS. 7 and 8, in a normal movement state, such as when the webbing 12 moves in the webbing insertion hole 33h by changing the posture of the occupant while the tongue plate 24 is connected and fixed to the buckle body 22, as shown in FIGS. Become. That is, the webbing 12 extends in a direction substantially orthogonal to the longitudinal direction of the webbing insertion hole 33 h and moves through the webbing insertion hole 33 h while passing between the protrusions 38. Of course, depending on the mode of force applied to the webbing 12 and the routing mode, the webbing 12 may move within the webbing insertion hole 33h while slightly riding on the protruding portion 38 on one side. Further, in this state, the webbing 12 is inserted and moved in the webbing insertion hole 33h while being in sliding contact with the hooking part 34 so as to be wound around the hooking part 34.

  On the other hand, for example, when one end side of the webbing 12 is pulled with a large force by the operation of the pretensioner mechanism or the like, as shown in FIG. 9 and FIG. Depending on the three-dimensional arrangement relationship of the anchor 16, anchor plate 18, buckle device 20), the webbing 12 is offset toward one end side of the webbing insertion hole 33 h and pressed against one surface side of the tongue plate 24. The webbing insertion hole 33h is inserted and moved.

  Then, the webbing 12 has a hooking portion between the pair of projecting portions 38 by a resultant force of a force acting toward one end side of the webbing insertion hole 33h and a force acting to press against one side of the tongue plate 24. From the surface of one side of 34, it slides on the surface of the curved corner portion 39 a, the side surface 39, and the curved front end side peripheral portion 38 a, and rides on the protruding portion 38. As a result, as shown in FIGS. 9 to 11, the webbing 12 rides on the protruding portion 38 on one side, and in this state, the webbing 12 moves through the webbing insertion hole 33 h. FIG. 11 illustrates the relationship between the protruding portion 38 and the webbing 12 along the line XI-XI in FIG. 9.

  At this time, since the webbing 12 is in a state of being pushed up to the protruding part 38 while being pressed against the protruding part 38, the force acting to bias the webbing 12 toward one end side of the webbing insertion hole 33h is The protrusions 38 are also distributed and received. Thereby, the offset of the webbing 12 in the webbing insertion hole 33h can be suppressed.

  According to the tongue plate configured as described above, the protruding portion 38 is formed in the plate main body portion 32 from the end portion of the webbing insertion hole 33h along a direction substantially perpendicular to the longitudinal direction thereof. When trying to insert the webbing insertion hole 33h so as to be offset toward one end side of the insertion hole 33h, the webbing 12 comes into sliding contact with the protruding portion 38 so as to ride up. As a result, the force for offsetting the webbing 12 is dispersed and received even in the protruding portion 38, and the deviation of the webbing 12 can be suppressed.

  At this time, according to the pulling force or the drawing mode of the webbing 12, an appropriate portion in the intermediate portion in the width direction of the webbing 12 is pressed against the protruding portion 38, thereby dispersing the force for biasing the webbing 12. Can do. For this reason, unlike the prior art, there is no need to abut the side edge portion of the webbing with another guide member, and therefore, wear and deterioration of the side edge portion of the webbing can be prevented.

  Here, for example, the following effects can be expected with respect to the force dispersion.

  That is, by the operation of the pretensioner mechanism, a force for pulling the webbing 12 toward one end side thereof and a force for pressing the webbing against the one surface side of the tongue plate 24 are applied. These resultant forces act in the direction of one surface of the tongue plate 24, the protruding portion 38, and the intersecting portion (corner portion 39a). In other words, a force acts to press the webbing 12 against the corner portion 39a.

  Further, the radius of curvature of the turn at the hooking portion 34 of the tongue plate 24 becomes large at the side edge portion of the webbing 12 riding on the protruding portion 38. Thereby, the webbing 12 can be smoothly inserted through the webbing insertion hole 33h. The more the webbing 12 on the offset side is smoothly inserted through the webbing insertion hole 33h, the less jamming occurs, and the webbing 12 can be smoothly inserted through the webbing insertion hole 33h. Further, as shown in FIG. 11, when the cross section of the climbing portion of the webbing 12 is considered, if the webbing insertion hole 33h is smoothly inserted on one end side (one side of the webbing 12) from the other side, the webbing A force is applied to rotate 12 from one side to the other. The direction of this force is in the opposite direction to the force that tries to offset the webbing 12. This also prevents the webbing 12 from being displaced.

  Furthermore, the force that biases the webbing 12 is deflected in the direction in which the webbing 12 is lifted up.

  Further, since the protruding portion 38 has a side surface 39 oriented inward in the longitudinal direction of the webbing insertion hole 33h, and the portion from the plate main body portion 32 to the side surface 39 is formed in a curved shape, the webbing 12 is It is possible to smoothly and easily ride on the protruding portion 38, and it is also possible to prevent the side edge portion of the webbing 12 from being bent or bent during riding.

  Further, since the distal end side peripheral portion 38a of the projecting portion 38 is also formed in a rounded curved surface, the webbing 12 is not easily caught on the projecting portion 38, and can smoothly and easily ride on the projecting portion 38. Makes smooth sliding contact. Further, since the webbing 12 and the protruding portion 38 are in surface contact with a relatively wide and smooth curved surface in a state in which the webbing 12 rides on the protruding portion 38, wear of the webbing 12 can be effectively prevented.

  Note that the protruding portion 38 needs to be formed to have a protruding dimension that can disperse the force that causes the webbing 12 to be biased and that the webbing 12 can ride on. For example, the protruding dimension of the protruding portion 38 is 4 mm or more in the vertical direction (more specifically, the vertical direction with respect to the one surface side of the webbing main body portion 32) from the webbing insertion hole 33h, and more preferably 4 to 5 mm. It is.

  Moreover, since the protrusion part 38 is formed with resin, the shaping | molding is easy and it is excellent also in the freedom degree of design.

  In the present embodiment, the pair of protrusions 38 are formed on both end sides of the webbing insertion hole 33h. However, the webbing 12 is inserted into the webbing 12 in accordance with the three-dimensional arrangement relationship of the members that support the webbing 12. In the case where it is possible to specify which end portion of the hole 33h is likely to be displaced, the protruding portion 38 may be provided only on one side.

  However, by forming the pair of protrusions 38 on both end sides of the webbing insertion hole 33h, for example, it can be used as the tongue plate 24 in the seat belt device for the driver's seat and the passenger's seat. Excellent and contributes to cost reduction.

  Of course, the protrusions 38 may be formed on both surfaces of the tongue plate 24.

  In the present embodiment, the tongue plate 24 that is a part of the buckle device 20 is assumed as the webbing insertion member, but the present invention can also be applied to the shoulder anchor 16, for example. In short, the present invention can be applied to various parts for inserting and guiding the webbing 12.

  Further, when the present invention is applied to the shoulder anchor 16, a configuration in which the fixing portion 30 is fixed to the vehicle body by bolt fastening or the like is employed, for example. In short, as the fixing portion 30, various configurations that are detachably or non-detachably fixed to the vehicle body are applied.

It is explanatory drawing which shows a three-point seatbelt apparatus. It is a top view which shows a tongue plate. It is a bottom view which shows a tongue plate. It is a side view which shows a tongue plate. It is a figure which shows the protrusion part of a tongue plate. It is the VI-VI sectional view taken on the line of FIG. It is a top view explaining the state of the webbing in a normal state. It is sectional drawing explaining the state of the webbing in a normal state. It is a top view explaining the state of the webbing in the state where the webbing was pulled so as to be offset. It is sectional drawing explaining the state of the webbing in the state pulled | stretched so that the webbing may be offset. It is explanatory drawing which shows the state which webbing got on the protrusion part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Seat belt apparatus 12 Webbing 20 Buckle apparatus 22 Buckle main body 24 Tongue plate 26 Plate member 28 Resin part 30 Fixing part 32 Plate main body part 33h Webbing insertion hole 38 Protruding part 38a Front end side peripheral part 39 Side 39a Corner part

Claims (6)

A webbing insertion member for guiding and inserting the webbing,
A fixing part provided for fixing to the vehicle body side,
A main body having an elongated hole-shaped webbing insertion hole through which the webbing can be inserted;
With
The main body is formed so as to protrude from the end of the webbing insertion hole along the direction substantially orthogonal to the longitudinal direction on the opposite side of the fixing part, and can be slidably contacted so that the webbing rides up. A webbing insertion member formed with a protrusion.   The webbing insertion member according to claim 1,
  The protruding portion is a webbing insertion member having a largest protruding dimension on the opposite side of the fixing portion from the webbing insertion hole. The webbing insertion member according to claim 1 or 2,
The webbing insertion member in which the front end side peripheral edge part on the opposite side to the said fixing | fixed part is formed in the rounded curved surface among the said protrusion parts. The webbing insertion member according to any one of claims 1 to 3,
A webbing insertion member having a side surface directed inward in the longitudinal direction of the webbing insertion hole, and a portion extending from the main body part to the side surface is formed in a curved surface. The webbing insertion member according to any one of claims 1 to 4,
The protrusion is a webbing insertion member formed of resin. A webbing insertion member according to any one of claims 1 to 5,
A webbing insertion member formed in a plane-symmetric shape with a surface substantially orthogonal to the longitudinal direction of the webbing insertion hole interposed therebetween.

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