JP2014046721A - Seat belt device tongue and seat belt device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat belt device tongue and a seat belt device capable of preventing or suppressing exceeding of clamp load applied to a webbing from prescribed magnitude.SOLUTION: In a seat belt device tongue 10, when load applied from a webbing 16 to a laying-around section 84 of a slider 82 exceeds mechanical strength of the laying-around section 84, the laying-around section 84 is deformed, a butting section 100 is brought closer to a load receiving section 102 of a tongue body 40 and abuts on the load receiving section 102. Accordingly, at least one part of the load applied to the laying-around section 84 of the slider 82 from the webbing 16 is dispersed in the load receiving section 102, that is, the tongue body 40. As a result, an increase in clamp load can be suppressed or prevented.

Description

  The present invention relates to a tongue for a seat belt device applied to a seat belt device for a vehicle and a seat belt device provided with such a tongue.

  A tongue for a seat belt device disclosed in Patent Document 1 (referred to as a “safety belt tongue” in Patent Document 1) includes a tongue main body formed in a substantially semicircular concave shape in a side view. I have. Two passage holes (one is referred to as “upper eye part” and the other as “lower eye part” in Patent Document 1) formed in the tongue main body part, and pass through these passage holes. The webbing (referred to as “belt webbing” in Patent Document 1) passes through the inside of the tongue main body between the two passage holes.

  In addition, a clamp member (referred to as “bending and tightening element” in Patent Document 1) curved in a substantially semicircular shape is provided inside the tongue main body. A webbing is wound around one end in the bending direction of the clamp member. When the tension of the webbing exceeds a predetermined level, the webbing presses the clamp member and clamps along the inner peripheral surface of the tongue main body. The member is rotated.

  In the clamp member thus rotated, the other end in the bending direction is pressed against the webbing to press the webbing, and the other end in the bending direction of the clamp member and the tongue main body portion clamp the webbing. This suppresses the shoulder webbing, which is the base end portion of the webbing, from moving toward the lap webbing, which is the tip side of the tongue.

JP-T-2009-525909

  By the way, when the webbing is clamped between the other end in the bending direction of the clamp member and the tongue main body in the above-mentioned Patent Document 1, the load that the webbing clamps, that is, the clamp load increases as the webbing tension increases.

  In view of the above fact, an object of the present invention is to provide a seat belt device tongue and a seat belt device capable of preventing or suppressing the clamp load applied to the webbing from exceeding a predetermined magnitude.

  The tongue for a seat belt device according to the first aspect of the present invention has an insertion portion that can be inserted into a buckle, and is provided on the webbing so that the webbing passes through the inside and is movable in the longitudinal direction of the webbing. The tongue main body is provided on the tongue main body so as to be movable in a predetermined direction with respect to the tongue main body by tension of the webbing when the webbing is wound around, and the tongue main body by moving in the predetermined direction A clamp member that clamps the webbing by a predetermined part and restricts the webbing from moving in a longitudinal direction thereof, and a load applied from the webbing to the clamp member exceeds a predetermined magnitude The at least part of the load in front of the clamp member from the predetermined direction side. It comprises a dispersing means for dispersing the tongue body.

  In the tongue for the seatbelt device according to the first aspect of the present invention, the insertion portion of the tongue main body is inserted into the buckle. If the webbing is hung around the occupant's body seated on the seat in this state, the webbing is attached to the occupant's body, and the occupant's body is restrained by the webbing.

  For example, the webbing is pulled by the occupant's body when the occupant's body attempts to move inertially forward due to the vehicle decelerating rapidly. Since the webbing is wound around a clamp member provided on the tongue main body, when the webbing is pulled by the occupant's body, the clamp member is pulled by the webbing. The clamp member pulled by the webbing moves in a predetermined direction with respect to the tongue main body.

  The clamp member thus moved in a predetermined direction clamps the webbing together with a predetermined portion of the tongue main body. Thereby, the webbing moves along its longitudinal direction, for example, the part that restrains the shoulder and chest of the occupant in the webbing, the part where the so-called `` shoulder webbing '' passes the tongue body of the tongue body and restrains the occupant's waist part, It moves to the so-called “wrap webbing” side, and thereby it is possible to prevent the lap webbing from becoming longer than before.

  When the tension of the webbing further increases from such a state and the load applied from the webbing to the clamp member based on the tension of the webbing exceeds a predetermined magnitude, the dispersing means moves in the predetermined direction with respect to the clamp member. From the webbing to receive at least part of the load applied to the clamp member and disperse it to the tongue body. Thereby, it is possible to suppress or prevent an increase in the force for sandwiching the webbing between the clamp member and the tongue main body, that is, the “clamp load”.

  According to a second aspect of the present invention, there is provided a seatbelt tongue according to the first aspect of the present invention, wherein the load receiving portion facing the clamp member in the predetermined direction is formed as a part of the tongue main body. The load receiving portion is used as the dispersing means.

  According to the tongue for a seat belt apparatus according to the second aspect of the present invention, the load receiving portion is formed as a part of the tongue main body so as to face the clamp member on a predetermined direction side which is the moving direction of the clamp member. The load receiving portion is used as a dispersing means. In this way, by forming the dispersing means as a part of the tongue main body, it is not necessary to separately provide the dispersing means, and an increase in the number of parts can be prevented.

  A seatbelt device according to a third aspect of the present invention is directed to a webbing in which a front end side is directly or indirectly locked to the seat or a vehicle body of a vehicle on a side of a seating position of an occupant in a vehicle seat; A buckle provided on a side opposite to the locking position on the front end side of the webbing via a seating position, and the tongue for the seat belt device according to claim 1 or claim 2 are provided.

  In the seat belt device according to the third aspect, the front end side of the webbing is directly or indirectly locked to the seat or the vehicle body of the vehicle on the side of the seating position of the occupant in the vehicle seat. The seat belt device is provided with a buckle provided on the opposite side of the seating position of the front end of the webbing through the seating position of the passenger in the seat in a state where the webbing is wound around the body of the passenger seated on the seat When the tongue is attached, the seat belt device tongue is held by the buckle, and the webbing is attached to the occupant's body.

  Here, the tongue for the seat belt apparatus constituting the seat belt apparatus according to the present invention has been described above. A tongue for a seat belt device according to claim 1 or claim 2. For this reason, it has been described above. The same effect as that of the present invention according to claim 1 or claim 2 is exhibited, and as a result, the above-described operation is performed. The same effect as that of the present invention described in claim 1 or claim 2 can be obtained.

  As described above, according to the present invention, the clamp load applied to the webbing can be prevented or suppressed from exceeding a predetermined magnitude.

It is a front view showing roughly the composition of the seatbelt device concerning a 1st embodiment. It is a disassembled perspective view which shows roughly the structure of the tongue for seatbelt apparatuses which concerns on 1st Embodiment. It is side surface sectional drawing which shows schematically the structure of the tongue for seatbelt apparatuses which concerns on 1st Embodiment. It is side surface sectional drawing corresponding to FIG. 3 which shows the state by which the webbing was clamped. It is sectional drawing corresponding to FIG. 4 which shows the state which the clamp member deform | transformed. It is a disassembled perspective view which shows schematically the structure of the tongue for seatbelt apparatuses which concerns on 2nd Embodiment. It is side surface sectional drawing which shows schematically the structure of the tongue for seatbelt apparatuses which concerns on 2nd Embodiment. It is side surface sectional drawing corresponding to FIG. 7 which shows the state by which the webbing was clamped. It is sectional drawing corresponding to FIG. 8 which shows the state which the clamp member deform | transformed.

  Next, each embodiment of the present invention will be described. It should be noted that the same reference numerals are given to portions that are basically the same as those of the above-described embodiment than the embodiment described in the following description of each embodiment, and detailed description thereof is omitted. .

<Configuration of First Embodiment>
FIG. 1 is a front view schematically showing the overall configuration of a seat belt apparatus 12 using a seat belt apparatus tongue 10 (hereinafter simply referred to as “tang 10”) according to the first embodiment.

  As shown in the figure, the tongue 10 includes a webbing take-up device 14 as webbing storage means. The webbing take-up device 14 is fixed to the vehicle body constituting the vehicle, for example, on the lower end side of the center pillar of the vehicle. The webbing take-up device 14 is provided with a spool (not shown) so as to be rotatable around an axis whose longitudinal direction is the longitudinal direction of the vehicle, for example, and the spool is formed in a long belt shape having flexibility. The base end side in the longitudinal direction of the webbing 16 is locked.

  The base end side in the longitudinal direction of the webbing 16 is stored while being wound around the outer periphery of the spool. The front end side of the spool in the webbing 16 is pulled out upward of the vehicle along the center pillar, passes through a shoulder anchor 18 provided in the vicinity of the upper end portion of the center pillar, and is folded back downward of the vehicle. The front end of the webbing 16 that is turned downward is locked to an anchor 22 fixed to the vehicle body on the side of the vehicle seat 20.

  In the present embodiment, the webbing take-up device 14 and the anchor 22 are fixed to the vehicle body side. However, for example, the webbing take-up device 14 may be built in the seat back 24 constituting the seat 20, or the webbing take-up device 14 may be provided behind the seat back 24. . Further, the anchor 22 may be configured to be attached to a member constituting the skeleton of the seat 20 or the like instead of the vehicle body.

  The tongue 10 according to the present embodiment is provided between the tip of the webbing 16 (the portion locked to the anchor 22) and the shoulder anchor 18. Corresponding to the tongue 10, a buckle 26 is fixed to a member constituting the skeleton of the vehicle body or the seat 20 on the side opposite to the position where the webbing retractor 14 and the anchor 22 are disposed via the seat 20.

  Although details will be described later, the tongue 10 can be attached to the buckle 26, and the occupant 30 seated on the seat cushion 28 of the seat 20 pulls out the webbing 16 from the spool of the webbing retractor 14, and the webbing 16 When the tongue 10 is mounted on the buckle 26 in a state where it is hung on the body from the front, the webbing 16 is mounted on the body of the occupant 30. In this state, the lap webbing 32 is defined between the tongue 10 and the anchor 22 in the webbing 16, the waist of the occupant 30 is restrained from the front, and the shoulder webbing 34 is defined between the shoulder anchor 18 and the tongue 10 in the webbing 16. Then, the shoulder portion and chest portion of the occupant 30 are restrained from the front.

  The seat belt device 12 of the present embodiment has a configuration corresponding to a single seat 20 such as a driver's seat or a passenger seat of a vehicle, for example. The present invention can be applied to bench seats. When the present invention is applied to such a bench seat, the webbing retractor 14 and the seat back 24 are provided on one side in the seat width direction with respect to the seating position of the occupant 30 on the bench seat, and the buckle 26 is provided on the other side. Is provided.

(Configuration of tongue 10)
2 shows an outline of the configuration of the tongue 10 in an exploded perspective view, and FIG. 3 shows a configuration of the tongue 10 in a side sectional view.

  As shown in this figure, the tongue 10 is provided with a core metal 42 constituting a tongue main body 40. The core metal 42 is formed by punching a metal flat plate and further bending it. The metal core 42 includes an insertion portion 44, and when the tongue 10 is attached to the buckle 26, the insertion portion 44 is inserted into the buckle 26 from an opening formed in the buckle 26. A through hole 46 is formed in the insertion portion 44. When the insertion portion 44 is inserted into the buckle 26, a latch provided on the buckle 26 enters the through hole 46. When the insertion part 44 tries to come out of the buckle 26, the movement of the insertion part 44 in the direction in which the latch interferes with the inner peripheral part of the through hole 46 and comes out of the buckle 26 is restricted. As a result, the tongue 10 is attached to the buckle 26.

  Further, a base end side of the core metal 42 from the insertion portion 44 (a side opposite to the insertion direction when the tongue 10 is inserted into the buckle 26) is a base portion 48. As shown in FIG. 3, the base 48 includes a side wall 50. The side wall 50 is made of a plate material constituting the core metal 42 from the base end side of the insertion portion 44 in the thickness direction of the insertion portion 44 (more specifically, the above insertion direction with respect to the thickness direction of the insertion portion 44. Is formed by bending toward the opposite direction. In addition, the base 48 includes a bottom wall 52. The bottom wall 52 is formed continuously from the end portion of the side wall 50 opposite to the insertion portion 44, and constitutes the core metal 42 around the end portion of the side wall 50 opposite to the insertion portion 44. It is formed by bending the plate material toward one side in the thickness direction of the side wall 50. For this reason, unlike the insertion part 44, the bottom wall 52 inclines in the insertion direction (downward in FIG. 3).

  Further, as shown in FIG. 3, the base 48 includes a side wall 54. The side wall 54 is formed continuously from the end of the bottom wall 52 opposite to the side wall 50, and the thickness of the plate constituting the cored bar 42 with the end of the bottom wall 52 opposite to the side wall 50 as an axis. It is formed by bending so that the vertical direction is along the insertion direction. As described above, the base 48 constituted by the side wall 50, the bottom wall 52, and the side wall 54 has a concave shape in which the cross-sectional shape is opened toward one side in the thickness direction of the bottom wall 52.

  In addition, openings 62 and 64 are formed in the base 48. The opening 62 is formed from the side wall 50 to the bottom wall 52, and communicates the inside of the base 48 and the outside of the base 48 more than the side wall 50 and the bottom wall 52. On the other hand, the opening 64 is formed from the bottom wall 52 to the side wall 54, and communicates the inside of the base 48 and the outside of the base 48 more than the bottom wall 52 and the side wall 54.

  The base 48 having such a configuration is covered with a cover 68 formed of a synthetic resin material. A space corresponding to the space between the side wall 50 and the side wall 54 of the base portion 48 in the covering portion 68 is a slider accommodating portion 70. Further, a webbing passage hole 72 is formed in the covering portion 68. The webbing passage hole 72 is formed by covering the inner peripheral portion of the opening 62 described above with a synthetic resin material constituting the covering portion 68, and the slider accommodating portion 70 and the covering portion 68 inside the covering portion 68. It communicates with the outside.

  A webbing passage hole 74 is formed in the covering portion 68. The webbing passage hole 74 is formed by covering the inner peripheral portion of the opening 64 described above with a synthetic resin material constituting the covering portion 68. However, the penetrating direction of the webbing passage hole 74 is along the thickness direction of the side wall 54, and the slider accommodating portion 70 inside the covering portion 68 and the outside of the covering portion 68 are formed along the thickness direction of the side wall 54. Communicate.

  In the webbing 16 described above, the shoulder webbing 34 passes through the webbing passage hole 74 from the outside of the covering part 68 and enters the slider accommodating part 70, and further passes through the webbing passage hole 72 and extends to the outside of the covering part 68. The portion is a lap webbing 32. A cover 76 is attached to the slider accommodating portion 70 from the opening side, that is, the side opposite to the bottom wall 52 of the side walls 50 and 54, and the slider accommodating portion 70 is hidden by the cover 76.

  A slider 82 as a clamp member is provided inside the slider accommodating portion 70. The slider 82 is formed by bending or bending a metal flat plate around an axis whose axial direction is the width direction of the cored bar 42. The portion of the slider 82 facing the bottom surface of the slider housing portion 70 is in sliding contact with the bottom surface of the slider housing portion 70, and the slider 82 is guided to the bottom surface of the slider housing portion 70 so that the slider 82 can move to the side wall 50 side or the side wall 54 side. is there. Hereinafter, the sliding direction on the side wall 54 side of the slider 82 along the bottom surface of the slider accommodating portion 70 will be referred to as a “clamping direction” for convenience.

  Further, the slider 82 includes a hooking portion 84, and the webbing 16 that passes through the webbing passage hole 72 and enters the inside of the slider accommodating portion 70 is looped around the outer peripheral surface thereof. Further, the portion that has passed through the webbing passage hole 72 is the lap webbing 32 on the tip side (the other end side) with respect to the portion that is wound around.

  On the other hand, a slider-side clamp portion 86 is formed continuously from the end portion on the side wall 54 side of the hanging portion 84. On the other hand, among the portions covering the side wall 54 in the covering portion 68 described above, the portion on the opening side of the slider accommodating portion 70 (the opening side of the slider accommodating portion 70 relative to the webbing passage hole 74) is a thick portion. 94. In the thick portion 94, the dimension of the covering portion 68 along the thickness direction of the side wall 54 is formed to be thicker than other portions, and the webbing passage hole 74 in the portion covering the side wall 54 in the covering portion 68. Further, it protrudes in a bowl shape on the inner side of the slider accommodating portion 70 from the bottom side portion of the slider accommodating portion 70.

  A corner portion on the inner side of the slider accommodating portion 70 in the thick portion 94 and on the bottom side of the slider accommodating portion 70 is a main body side clamp portion 98. The main body side clamp portion 98 is opposed to the slider side clamp portion 86 of the slider 82 in the clamp direction. As shown in FIG. 4, when the slider 82 slides in the clamp direction, the slider side clamp portion 86 is moved to the main body. The side clamp part 98 is approached. By approaching in this way, the webbing 16 can be clamped by the slider side clamp part 86 and the main body side clamp part 98.

  An abutment portion 100 is formed on the side of the hooking portion 84 opposite to the slider side clamp portion 86. The abutment portion 100 is applied with a load based on the tension on the lap webbing 32 side in the webbing 16 together with the hooking portion 84. When this load exceeds the mechanical strength of the hanging portion 84 and the attaching portion 100, the hanging portion 84 and the attaching portion 100 are deformed so that the attaching portion 100 enters the inside of the webbing passage hole 72, and further, As shown in FIG. 5, the tip of the abutting portion 100 abuts on a load receiving portion 102 as a dispersing means facing the tip of the abutting portion 100 in the webbing passage hole 72.

  On the other hand, as shown in FIG. 2, the slider 82 is provided with a pair of slider urging springs 112 as slider urging means. The slider urging spring 112 is a narrow flat plate-like metal plate having a width direction along the thickness direction of the bottom wall 52 constituting the base portion 48 of the core metal 42 described above. It is formed by bending or bending around an axial direction.

  The slider biasing spring 112 has a base 114. A pressure contact piece 116 is formed continuously from one longitudinal end of the base 114.

  The press contact piece 116 is formed by bending or curving a metal plate material constituting the slider biasing spring 112 around an axis whose axial direction is the width direction at one longitudinal end of the base 114. The distal end side (the end side opposite to the base 114) of the pressure contact piece 116 is formed in a tapered shape that gradually becomes narrower toward the distal end, and the distal end is in pressure contact with the inner peripheral portion of the slider 82. The urging spring 112 urges the slider 82 toward the side wall 50.

<Operation and Effect of First Embodiment>
Next, the operation and effect of the present embodiment will be described.

  In the seat belt device 12 to which the tongue 10 is applied, when the occupant 30 seated on the seat cushion 28 of the seat 20 wears the webbing 16 on the body, first, the webbing 16 is attached together with the tongue 10 while holding the tongue 10. pull. By pulling the webbing 16, the webbing 16 is pulled out from the spool of the webbing take-up device 14. When the occupant 30 hangs the webbing 16 on the body in front of the body with the webbing 16 pulled out in this way, and the insertion part 44 of the tongue 10 is inserted into the buckle 26 in this state, the tongue 10 is held by the buckle 26. The webbing 16 is attached to the body of the occupant 30.

  When the webbing 16 is attached to the body of the occupant 30, the portion of the webbing 16 between the tongue 10 and the anchor 22 is a lap webbing 32, and the waist of the occupant 30 is restrained by the lap webbing 32 from the front or the upper side of the seat 20. Is done. On the other hand, the portion of the webbing 16 between the tongue 10 and the shoulder anchor 18 is a shoulder webbing 34, and the shoulder and chest of the occupant 30 are restrained by the shoulder webbing 34 from the front of the seat 20.

  With the webbing 16 attached, for example, when the vehicle suddenly decelerates, both the lap webbing 32 and the shoulder webbing 34 of the webbing 16 are pulled forward of the seat 20 by the body of the occupant 30. When the lap webbing 32 and the shoulder webbing 34 are pulled in this manner, the webbing 16 pulls the hooking portion 84 of the slider 82 in the clamping direction inside the slider accommodating portion 70 of the tongue 10. When the force applied from the webbing 16 to the hooking portion 84 exceeds the biasing force of the slider biasing spring 112, the slider 82 slides in the clamping direction.

  When the slider 82 slides in the clamping direction in this manner, the slider-side clamp portion 86 presses one surface in the thickness direction of the webbing 16 (the right side surface in FIG. 3), and the webbing 16 is pressed against the body-side clamp portion 98. Let Thereby, as shown in FIG. 4, the webbing 16 is clamped by the slider 82 and the main body side clamp portion 98. In this way, it is possible to prevent or suppress the portion of the webbing 16 on the shoulder webbing 34 side from passing through the slider accommodating portion 70 and moving to the lap webbing 32 side.

  Further, in this state, when the force of the body of the occupant 30 pulling the lap webbing 32 and the shoulder webbing 34 to the front of the seat 20 increases, the load applied from the webbing 16 to the hanging portion 84 of the slider 82 also increases. Along with this, the load that clamps the webbing 16 between the slider-side clamp portion 86 of the slider 82 and the body-side clamp portion 96 of the tongue main body 40, that is, the “clamp load” increases.

  Here, when the load applied from the webbing 16 to the hooking portion 84 of the slider 82 increases and exceeds the mechanical strength of the hooking portion 84 of the slider 82 (that is, from the webbing 16 to the hooking portion 84 of the slider 82). When the applied load increases and exceeds a predetermined size), as shown in FIG. 5, the hanging portion 84 and the attachment portion 100 are arranged so that the attachment portion 100 enters the inside of the webbing passage hole 72. The tip of the abutment portion 100 comes into contact with the load receiving portion 102 that is deformed and faces the tip of the abutment portion 100 in the webbing passage hole 72.

  When the tip of the abutment portion 100 abuts against the load receiving portion 102 in this way, at least a part of the load applied from the webbing 16 to the hanging portion 84 of the slider 82 is applied to the load receiving portion 102, that is, the tongue main body 40. Distributed. Thereby, the increase in clamp load can be suppressed or prevented.

  Next, a second embodiment will be described.

<Configuration of Second Embodiment>
(Configuration of tongue 130)
FIG. 6 is an exploded perspective view showing an outline of the configuration of the seat belt device tongue 130 according to the present embodiment (hereinafter simply referred to as “tang 130”), and FIG. 7 shows the configuration of the tongue 130. It is shown by a side sectional view.

  As shown in this figure, the tongue 130 includes a cored bar 142 that constitutes the tongue main body 140. The cored bar 142 is formed by punching a metal flat plate and bending it into a crank shape (saddle shape) around an axis whose axial direction is the width direction. The metal core 142 includes an insertion portion 144. When the tongue 130 is attached to the buckle 26, the insertion portion 144 is inserted into the buckle 26 from an opening formed in the buckle 26.

  A through hole 146 is formed in the insertion portion 144. When the insertion portion 144 is inserted into the buckle 26, a latch provided on the buckle 26 enters the through hole 146. When the insertion portion 144 tries to come out of the buckle 26, the latch interferes with the inner peripheral portion of the through hole 146, and the movement of the insertion portion 144 in the direction of coming out of the buckle 26 is restricted. As a result, the tongue 130 is attached to the buckle 26.

  Further, as shown in FIG. 7, the base end side of the core bar 142 from the insertion portion 144 (the side opposite to the insertion direction when the tongue 130 is inserted into the buckle 26) is a base portion 148. The base portion 148 is bent to one side in the thickness direction of the base portion around an axis whose width direction is the axial direction. Further, the base portion 148 is bent toward the side opposite to the insertion direction on the base end side from the bent portion. In this way, a hole (not shown) (for example, a rectangular hole) penetrating in the thickness direction is formed in the portion bent into a crank shape.

  The base portion 148 having such a configuration is covered with a covering portion 152 formed of a synthetic resin material. A slider accommodating portion 154 is formed in a portion corresponding to the hole portion formed in the base portion 148 described above in the covering portion 152. The slider accommodating portion 154 opens on the tip end side and one side in the thickness direction of the cored bar 142. Further, a webbing passage hole 156 is formed in a portion of the slider accommodating portion 154 located on the base end side of the core bar 142.

  The webbing passage hole 156 opens at the base end side of the cored bar 142 and is connected to the slider accommodating portion 154 at the distal end side of the cored bar 142. The webbing 16 passes through the webbing passage hole 156, and the webbing 16 that has entered the slider accommodation part 154 through the webbing passage hole 156 can pass through the slider accommodation part 154 toward the distal end side of the cored bar 142, and in the width direction. It can be bent to one side in the thickness direction of the cored bar 142 around the axis as the axial direction, extend to the outside of the slider accommodating portion 154, and be folded back to the proximal end side of the cored bar 142.

  A slider 162 as a clamp member is provided inside the slider accommodating portion 154. The slider 162 is formed in a substantially cylindrical shape penetrating in the width direction of the core metal 142 by appropriately bending the metal plate material around an axis whose axial direction is the width direction of the core metal 142. The slider 162 includes a sliding contact portion 164 whose outer surface is planar. A guide surface 166 is formed in the slider accommodating portion 154 corresponding to the sliding contact portion 164. The webbing passage hole 156 is an inclined surface inclined in the insertion direction of the core bar 142 with respect to the thickness direction of the core bar 142, and the slider 162 is guided by the guide surface 166 at the sliding contact portion 164. As it moves in the other direction (leftward in each figure of FIGS. 7 to 9), it moves to the base end side of the cored bar 142 (moves upward in each figure of FIGS. 7 to 9).

  On the other side in the circumferential direction of the slider 162 with respect to the sliding contact portion 164, a slider side clamp portion 168 is formed continuously from the sliding contact portion 164. In the slider side clamp portion 168, the slider 162 is formed into a wave shape in a side view by being appropriately bent or curved in the width direction. Corresponding to the slider side clamp part 168, a main body side clamp part 170 is formed inside the slider accommodating part 154.

  The main body side clamp part 170 is formed in a wave shape whose side cross-sectional shape is appropriately bent or curved around an axis whose axial direction is the width direction of the cored bar 142. The concave portion in the main body side clamp portion 170 faces the convex portion in the slider side clamp portion 168 in the sliding direction of the slider 162 guided and slid by the guide surface 166, and the convex portion in the main body side clamp portion 170 slides on the slider 162. It faces the concave portion in the slider side clamp portion 168 in the direction.

  For this reason, when the slider 162 is guided by the guide surface 166 and slid toward the main body side clamp portion 170, the convex portion in the slider side clamp portion 168 enters the concave portion in the main body side clamp portion 170, and enters the concave portion in the slider side clamp portion 168. The convex part in the main body side clamp part 170 enters, and the slider side clamp part 168 and the main body side clamp part 170 sandwich the webbing 16 while curving around the axis whose axial direction is the width direction. Hereinafter, for the sake of convenience, the moving direction (sliding direction) of the slider 162 when the slider side clamp part 168 approaches the main body side clamp part 170 by being guided by the guide surface 166 is referred to as “clamp direction”.

  The other side of the slider 162 in the circumferential direction with respect to the slider side clamp portion 168 is a hung portion 172, and the webbing 16 that passes through the webbing passage hole 156 and enters the slider accommodating portion 154 is hung as shown in FIG. It is hung around the turning part 172. The webbing 16 that has been wound around the hanging portion 172 in this manner has a shoulder webbing 34 on the proximal end side (that is, the shoulder anchor 18 side) and a lap webbing 32 on the distal end side (that is, the anchor 22 side). It becomes. Further, the other end portion of the slider 162 in the circumferential direction is an attaching portion 174. The abutting portion 174 is located outside the slider 162 with respect to the sliding contact portion 164.

  A load receiving portion 176 as a dispersing means is formed on the side opposite to the clamping direction of the guide surface 166 described above. The load receiving portion 176 is opposed to the abutting portion 174 on the clamping direction side, and the abutting portion 174 is in contact therewith.

  Further, slider urging means (not shown) is provided inside the slider 162 or inside the slider accommodating portion 154, and the urging portion 172 is urged in the direction opposite to the clamping direction and is applied to the slider 162. When the load in the clamping direction is larger than the urging force of the slider urging means, the slider 162 is guided by the guide surface 166 and slides in the clamping direction.

<Operation and Effect of Second Embodiment>
Next, the operation and effect of the present embodiment will be described.

  In the seat belt device 12 to which the tongue 130 is applied, when the force applied from the webbing 16 to the hooking portion 172 of the slider 162 exceeds the urging force of the slider urging means, the slider 162 slides in the clamping direction. When the slider 162 slides in the clamping direction in this way, the slider-side clamp portion 168 presses one surface in the thickness direction of the webbing 16 (the right-side surface in FIG. 7), and the body-side clamp portion 170 of the slider accommodating portion 154. Press on.

  Accordingly, the webbing 16 is clamped by the slider-side clamp unit 168 and the main body side clamp unit 170 while the webbing 16 is curved following the unevenness of the slider side clamp unit 168 and the main body side clamp unit 170. Thus, by clamping the webbing 16, it is possible to prevent or suppress the portion of the webbing 16 on the shoulder webbing 34 side from passing through the slider accommodating portion 154 and moving to the lap webbing 32 side.

  Further, in this state, when the force of the body of the occupant 30 pulling the lap webbing 32 and the shoulder webbing 34 to the front of the seat 20 increases, the load applied from the webbing 16 to the hanging portion 172 of the slider 162 also increases. Along with this, a load for sandwiching the webbing 16 between the slider-side clamp portion 168 of the slider 162 and the main body-side clamp portion 170 of the slider accommodating portion 154, that is, a “clamp load” increases.

  Here, when the load applied from the webbing 16 to the hooking portion 172 of the slider 162 increases and exceeds the mechanical strength of the hooking portion 172 of the slider 162 (that is, from the webbing 16 to the hooking portion 172 of the slider 162). When the applied load increases and exceeds a predetermined size), the hung portion 172 is deformed.

  When such deformation occurs in the hooking portion 172, the attaching portion 174 approaches the load receiving portion 176, and further, the attaching portion 174 abuts on the load receiving portion 176 as shown in FIG. When the abutting portion 174 contacts the load receiving portion 176 in this way, at least a part of the load applied from the webbing 16 to the hanging portion 172 of the slider 162 is distributed to the load receiving portion 176, that is, the tongue main body 140. The Thereby, the increase in clamp load can be suppressed or prevented.

DESCRIPTION OF SYMBOLS 10 Tongue for seat belt device 12 Seat belt device 16 Webbing 26 Buckle 30 Crew 40 Tongue body 82 Slider (clamp member)
102 Load receiving part (dispersing means)
130 tongue for seat belt device 140 tongue main body 162 slider (clamp member)
176 Load receiving part (dispersing means)

Claims (3)

A tongue body provided on the webbing so as to be movable in the longitudinal direction of the webbing through the webbing while having an insertion part that can be inserted into a buckle,
The webbing is provided on the tongue main body so as to be movable in a predetermined direction with respect to the tongue main body by the tension of the webbing, and by the predetermined part in the tongue main body by moving in the predetermined direction A clamp member that clamps the webbing and restricts the webbing from moving in the longitudinal direction;
When the load applied from the webbing to the clamp member exceeds a predetermined magnitude, the clamp member comes into contact with the clamp member from the predetermined direction side, and at least a part of the load is applied to the tongue main body. Dispersing means for dispersing;
A tongue for a seat belt device comprising:   The seat belt device tongue according to claim 1, wherein a load receiving portion facing the clamp member in the predetermined direction is formed as a part of the tongue main body, and the load receiving portion is used as the dispersing means. A webbing whose front end is directly or indirectly locked to the seat or the vehicle body of the vehicle on the side of the seating position of the occupant in the vehicle seat;
A buckle provided on the opposite side to the locking position on the tip side of the webbing via the seating position;
The tongue for the seat belt device according to claim 1 or 2,
A seat belt device comprising:

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