JP6775409B2 - Tongs and seat belt equipment - Google Patents

Description

The present invention relates to tongs and seatbelt devices, and more particularly to tongs in which a shoulder belt and a lap belt are connected to a webbing separately configured, and a seatbelt device including the tongs.

Vehicles such as automobiles are generally provided with a seatbelt device that restrains the occupant on the seat on which the occupant sits. Such a seatbelt device includes a webbing that restrains an occupant, a retractor that winds the webbing, a guide anchor that is connected to the vehicle body side to guide the webbing, a belt anchor that fixes the webbing to the vehicle body side, and a side surface of the seat. It has a buckle arranged in the seat and a tongs arranged in the webbing, and the occupant is restrained to the seat by the webbing by fitting the tongs to the buckle.

Webbing can be classified into a shoulder belt that restrains the shoulder of the occupant and a wrap belt that restrains the waist of the occupant with the tongs fitted to the buckle. For example, Patent Document 1 discloses a configuration in which a shoulder belt and a wrap belt are separately configured and each belt is connected to tongs.

Special Table 2002-541008

As described in Patent Document 1, by configuring the shoulder belt and the lap belt separately, even when the occupant tries to move forward by inertial force in an emergency such as a vehicle collision, the lap It is possible to prevent the shoulder belt from being pulled by the belt.

On the other hand, since the waist of the occupant is restrained by the wrap belt, the upper body of the occupant rotates forward with the waist as the base point, and the load on the part connected to the tongs of the shoulder belt increases. There is.

The present invention has been devised in view of such a problem, and provides a tongs and a seatbelt device capable of reducing a load generated at a portion connected to a tongs of a shoulder belt in an emergency such as a vehicle collision. With the goal.

According to the present invention, in the tongs connected to the shoulder belt that restrains the shoulder portion of the occupant and the lap belt that restrains the waist portion of the occupant, the first connecting portion to which the shoulder belt is connected and the lap belt are connected. A tongs body having a tongs plate fitted to a buckle, and a tongs cover that covers at least the first connection, the first connection of which is the end of the shoulder belt. A tubular fixing pin to which the tongs are fixed, a shaft arranged on the outer periphery of the fixing pin, the shoulder belt is wound around the shoulder belt, and the first end portion is rotatably supported by the tong body, and the inside of the fixing pin. A torsion bar whose first end is fixed to the shaft, and a torsion bar which is fixed to the tong body and rotatably supports the second end of the shaft, and the second end of the torsion bar. A tongs is provided, characterized in that it has a fixed holder and.

Further, according to the present invention, in a seat belt device including a shoulder belt that restrains the shoulder portion of an occupant, a lap belt that restrains the waist portion of the occupant, and a shoulder belt and a tongue connected to the lap belt. The tongue includes a first connection portion to which the shoulder belt is connected, a second connection portion to which the lap belt is connected, a tongue body including a tongue plate fitted to a buckle, and at least the first connection portion. The first connection portion includes a tongue cover that covers the connection portion, and the first connection portion is arranged on the outer periphery of the tubular fixing pin to which the end portion of the shoulder belt is fixed and the shoulder belt is wound around. The shaft is rotatably supported by the tongue body, the torsion bar is inserted into the fixing pin and the first end is fixed to the shaft, and the tongue body is fixed to the shaft. Provided is a seat belt device comprising a holder that rotatably supports the second end of the shaft and to which the second end of the torsion bar is fixed.

In the tongs and seatbelt device described above, the shaft may include a slit that guides the shoulder belt fixed to the fixing pin to the outer circumference of the shaft.

Further, the tongs cover may include a belt holding portion that can come into contact with the surface of the shoulder belt wound around the shaft.

Further, the second connecting portion includes a support pin to which the end portion of the wrap belt is connected and fixed to the tong body, and the length of the support pin may be shorter than the length of the fixing pin. ..

According to the tongs and seatbelt device according to the present invention described above, the torsion bar is twisted by arranging a torsion bar that can be twisted when a predetermined load is applied to the connection portion (first connection portion) of the shoulder belt. The shoulder belt can be pulled out from the tongs, and the load generated at the shoulder belt connection portion (first connection portion) in an emergency such as a vehicle collision can be reduced. Further, by arranging the torsion bar inside the fixing pin for fixing the shoulder belt, it is possible to avoid the interference between the torsion bar and the shoulder belt.

It is an external view which shows the tongs which concerns on one Embodiment of this invention, (A) shows the front side, (B) shows the back side. It is a perspective view which shows the state which showed the tongs cover removed which shown in FIG. 1, (A) shows the front surface side, (B) shows the back surface side. It is explanatory drawing of the tongs shown in FIG. 1, (A) is a plan view of the back surface side, (B) is a sectional view taken along line BB in FIG. 3 (A). It is a figure which shows an example of the 1st connection part, (A) is a component development view, (B) is a sectional view. It is sectional drawing which shows the use state of the tongs shown in FIG. 1, (A) shows a normal state, (B) shows an emergency. It is an overall block diagram which shows the seat belt apparatus which concerns on one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1A to 6A. Here, FIG. 1 is an external view showing a tongs according to an embodiment of the present invention, (A) showing the front side and (B) showing the back side. 2A and 2B are perspective views showing a state in which the tongs cover shown in FIG. 1 is removed, in which FIG. 2A shows the front surface side and FIG. 2B shows the back surface side. 3A and 3B are explanatory views of the tongs shown in FIG. 1, in which FIG. 3A is a plan view of the back surface side, and FIG. 3B is a sectional view taken along line BB in FIG. 3A. 4A and 4B are views showing an example of a first connection portion, where FIG. 4A is a component development view and FIG. 4B is a sectional view. 5A and 5B are cross-sectional views showing a usage state of the tongs shown in FIG. 1, in which FIG. 5A shows a normal time and FIG. 5B shows an emergency. In each drawing, the front surface side generally means the side in contact with the occupant, and the back surface side means the side exposed in the vehicle interior, but the front and back sides may be inverted.

In the tongs 1 according to the embodiment of the present invention, as shown in FIGS. 1 (A) to 5 (B), the first connecting portion 2 to which the shoulder belt Bs is connected and the lap belt Br are connected. The first connection portion 2 includes a second connection portion 3, a tong body 4 having a tong plate 41 fitted to a buckle (see FIG. 6), and a tong cover 5 covering at least the first connection portion 2. Is a tubular fixing pin 21 to which the end portion of the shoulder belt Bs is fixed, and the tong body 4 is arranged on the outer periphery of the fixing pin 21 so that the shoulder belt Bs is wound and the first end portion 22a is rotatable. The supported shaft 22, the torsion bar 23 inserted into the fixing pin 21 and the first end portion 23a fixed to the shaft 22, and the tong body 4 are fixed and the second end portion 22b of the shaft 22 is rotated. It is provided with a holder 24 that is capable of supporting and to which the second end portion 23b of the torsion bar 23 is fixed.

The tongs 1 are connected to a webbing in which the shoulder belt Bs that restrains the shoulders of the occupant and the lap belt Br that restrains the waist of the occupant are separately configured. The tong body 4 is, for example, a metal part, and as shown in FIG. 2A, a pair of first side walls 42 that support the first connection portion 2 and a pair that support the second connection portion 3. The second side wall 43 of the above is provided. The second side wall 43 is formed so as to stand upright from the tong plate 41, and the first side wall 42 is formed so as to extend from the second side wall 43.

The second connecting portion 3 to which the lap belt Br is connected includes a support pin 31 to which the end portion of the lap belt Br is connected and fixed to the tong body 4. The support pin 31 is composed of bolts and nuts fixed to the tong body 4, for example, as shown in FIG. 2 (A). The support pin 31 is fixed to the second side wall 43 formed on the tong body 4.

Further, the axial length of the support pin 31 is formed to be shorter than the axial length of the fixing pin 21. In general, in an emergency such as a vehicle collision, the lap belt Br tends to have a higher load than the shoulder belt Bs. Therefore, in the present embodiment, the strength of the second connecting portion 3 is increased by making the length of the support pin 31 shorter than that of the fixing pin 21.

The first connecting portion 2 to which the shoulder belt Bs is connected is composed of, for example, a fixing pin 21, a shaft 22, a torsion bar 23, and a holder 24, as shown in FIGS. 4 (A) and 4 (B). It is a shaft member. The first connecting portion 2 is fixed to the first side wall 42 formed on the tong body 4.

The fixing pin 21 is, for example, a cylindrical component made of resin or metal. The shoulder belt Bs has a tubular tab formed by folding back and suturing the end portion. By inserting the fixing pin 21 into this tab, the shoulder belt Bs is fixed to the fixing pin 21. The first end 21a of the fixing pin 21 is inserted into a recess or step formed on the inner surface of the shaft 22, and the second end 21b of the fixing pin 21 is a recess or step formed on the inner surface of the holder 24. Will be inserted into.

The method of fixing the shoulder belts Bs is merely an example, and is not limited to the illustrated configuration. For example, a step portion is formed by folding back and suturing the end portion of the shoulder belt Bs, and the shoulder belt Bs is fixed to the fixing pin 21 by locking the step portion to the slit formed in the fixing pin 21. It may be.

The shaft 22 is, for example, a resin or metal substantially cylindrical part in which the first end portion 22a side is closed. A recess 22c that can be fitted into the opening formed in the first side wall 42 of the tong body 4 is formed on the outer surface of the first end portion 22a. Further, a recess 22d into which the torsion bar 23 can be inserted is formed on the inner surface of the first end portion 22a.

Further, the second end 22b side of the shaft 22 has an open mouth, and the tip of the holder 24 is inserted. As shown in FIG. 4B, the shaft 22 has a certain gap between the outer circumference of the fixing pin 21 and the inner circumference of the shaft 22 in the assembled state, and the fixing pin 21 has a certain gap in this gap. The extrapolated shoulder belt Bs is inserted into the.

Further, the shaft 22 is provided with a slit 22e that guides the shoulder belt Bs fixed to the fixing pin 21 to the outer periphery of the shaft 22. By forming such a slit 22e, the fixing pin 21 can be inserted inside the shaft 22 with the fixing pin 21 inserted in the tab of the shoulder belt Bs. Further, the slit 22e may be formed with an inclined surface 22f for suppressing the generation of a stepped portion due to the overlap of the shoulder belts Bs.

The torsion bar 23 is, for example, a metal component having a substantially cylindrical shape. When the load generated on the torsion bar 23 is less than a predetermined load (twisting load), the torsion bar 23 does not twist, and when a load exceeding a predetermined load (twisting load) is generated on the torsion bar 23, the torsion bar 23 does not twist. Is configured to twist.

The torsional load of the torsion bar 23 is set to a load larger than the pretension load that removes the slack of the shoulder belt Bs by, for example, a retractor that winds up the shoulder belt Bs. Therefore, even when the pretensioner is activated in an emergency such as a vehicle collision, the torsion bar 23 does not twist and the slack of the shoulder belt Bs can be removed.

Further, as shown in FIG. 4B, the first end portion 23a of the torsion bar 23 is fixed to the recess 22d formed on the inner surface of the shaft 22, and the second end portion 23b of the torsion bar 23 is a holder. It is fixed to the recess 24a formed on the inner surface of the 24.

The holder 24 is a component that fixes the first connecting portion 2 to the tong body 4. As shown in FIG. 4A, the holder 24 has an insertion portion 24b inserted into an opening formed in the first side wall 42 of the tong body 4, and a shaft 22 formed at the tip of the insertion portion 24b. It is provided with a bearing portion 24c that rotatably supports the bearing portion 24c, and a flange portion 24d formed at the rear end of the insertion portion 24b and capable of contacting the outer surface of the first side wall 42.

A protrusion 24e that can be locked to the opening of the first side wall 42 may be formed on the peripheral surface of the insertion portion 24b. By arranging such protrusions 24e, the holder 24 can be easily positioned. As shown in FIG. 4B, the bearing portion 24c is configured such that the inner peripheral surface of the shaft 22 abuts on the outer peripheral surface and the outer peripheral surface of the fixing pin 21 abuts on the inner peripheral surface. Further, a recess 24a for fixing the torsion bar 23 is formed on the inner surface of the insertion portion 24b. The flange portion 24d may be formed with a recess 24g for locking the metal fitting 24f (see FIG. 2B) for fixing the holder 24 to the tong body 4.

In the first connection portion 2 described above, the holder 24 is fixed to the tong body 4 (first side wall 42), the second end portion 23b of the torsion bar 23 is fixed to the holder 24, and the first end portion 23a of the torsion bar 23 is fixed. The shaft 22 is fixed to the shaft 22, and the shaft 22 is rotatably supported by the holder 24 and the tong body 4 (first side wall 42). Further, as shown in FIG. 5A, the shoulder belt Bs is fixed to the fixing pin 21, is pulled out from the slit 22e of the shaft 22, and is wound around the outer circumference of the shaft 22.

Therefore, even if the shoulder belt Bs is pulled by the movement of the occupant's upper body in an emergency such as when the pretensioner is activated or in a vehicle collision, if the load generated on the torsion bar 23 is less than the torsional load. Since the torsion bar 23 does not twist, the shaft 22 does not rotate and the shoulder belt Bs is not pulled out from the first connecting portion 2, and the normal state shown in FIG. 5 (A) is maintained. In FIG. 5A, the figure of the tongs cover 5 is omitted for convenience of explanation.

On the other hand, when the shoulder belt Bs is pulled in an emergency such as a vehicle collision and the load generated on the torsion bar 23 reaches the torsion load or more, the torsion bar 23 is twisted. As shown, the shaft 22 rotates and the shoulder belt Bs is pulled out from the first connecting portion 2. Therefore, by adopting the configuration of the first connecting portion 2 described above, the load generated on the first connecting portion 2 of the shoulder belt Bs can be reduced. In FIG. 5B, the figure of the tongs cover 5 is omitted for convenience of explanation.

Further, in the first connection portion 2 described above, by arranging the torsion bar 23 inside the fixing pin 21 for fixing the shoulder belt Bs, interference between the torsion bar 23 and the shoulder belt Bs can be avoided. Therefore, the shoulder belt Bs does not hinder the twisting of the torsion bar 23, and it is possible to prevent the shoulder belt Bs from being damaged due to the heat generated when the torsion bar 23 is twisted.

The tong cover 5 is, for example, a component that covers the first side wall 42, the second side wall 43, and the first connection portion 2 of the tong body 4. The tongs cover 5 mainly has a function of improving the design appearance of the tongs 1. The tongs cover 5 includes, for example, as shown in FIGS. 1A and 1B, a first cover member 51 mainly covering the back surface of the tongs 1 and a second cover member 52 mainly covering the front surface of the tongs 1. And, it is divided into.

The first cover member 51 includes, for example, an opening 51a for pulling out the shoulder belt Bs connected to the first connecting portion 2 to the outside, as shown in FIGS. 3 (A) and 3 (B). It is provided with a recess 51b for partitioning a space for accommodating one connection portion 2.

As shown in FIG. 1A, the second cover member 52 includes, for example, a pair of arm portions 52a that cover the second side wall 43, and an intermediate portion 52b that connects the arm portions 52a to each other. As shown in FIG. 3B, a belt holding portion 52c arranged along the surface of the shoulder belt Bs wound around the shaft 22 is formed inside the intermediate portion 52b. The belt holding portion 52c is arranged so as to come into contact with the surface of the shoulder belt Bs. That is, the tong cover 5 includes a belt holding portion 52c that can come into contact with the surface of the shoulder belt Bs wound around the shaft 22.

By forming the belt holding portion 52c on the tong cover 5, it is possible to suppress the slackening of the shoulder belt Bs wound around the shaft 22. Further, when a certain distance is provided between the belt holding portion 52c and the opening 51a, the stretching direction of the shoulder belt Bs is bent with respect to the stretching direction of the tong plate 41 when the seat belt device is used. However, the wrinkles generated on the shoulder belts Bs are contained in the tongs cover 5, and the aesthetic appearance of the tongs 1 can be maintained.

The configuration of the tongs cover 5 described above is merely an example, and is not limited to the configuration shown in the figure. For example, the division position of the first cover member 51 and the second cover member 52 may be changed, the tongs cover 5 may be divided into three or more cover members, or the first cover member 51 may have a belt. A holding portion may be formed.

Next, the seatbelt device according to the embodiment of the present invention will be described with reference to FIG. Here, FIG. 6 is an overall configuration diagram showing a seatbelt device according to an embodiment of the present invention. In FIG. 6, for convenience of explanation, parts other than the seatbelt device are shown by alternate long and short dash lines.

In the seatbelt device 10 according to the present embodiment shown in FIG. 6, the shoulder belt Bs that restrains the shoulder portion of the occupant, the wrap belt Br that restrains the waist portion of the occupant, and the first retractor that winds up the shoulder belt Bs. 101, a guide anchor 102 connected to the vehicle body side to guide the shoulder belt Bs, a second retractor 103 for winding the lap belt Br, a buckle 104 arranged on the side surface of the seat S, a shoulder belt Bs and a wrap. It includes a tongue 1 connected to a belt Br.

The illustrated seat S indicates a seat arranged in the passenger seat of a right-hand drive vehicle, but is not limited to such a seat, and is arranged in a seat arranged in the driver's seat or the rear seat or a left-hand drive vehicle. Sheet may be used.

In the seatbelt device 10 according to the present embodiment, since the shoulder belt Bs and the lap belt Br that restrain the occupant are separately configured, the first retractor 101 for the shoulder belt Bs and the first retractor 101 for the lap belt Br are configured separately. It is provided with two retractors, the two retractors 103. The first retractor 101 is built in, for example, the backrest portion (seat back) of the seat S, and the second retractor 103 is built in, for example, the seating portion (seat cushion) of the seat S.

The tongs 1 have, for example, the configurations shown in FIGS. 1A to 5B, and the contents are as described above. Therefore, detailed description thereof will be omitted here. According to the seatbelt device 10 provided with the tongs 1 according to the present embodiment described above, it is possible to reduce the load generated at the connection portion of the shoulder belts Bs in an emergency such as a vehicle collision.

The structure and arrangement of the first retractor 101, the guide anchor 102, the second retractor 103, and the buckle 104 shown in FIG. 6 are merely examples, and are not limited to the illustrated configuration.

The present invention is not limited to the above-described embodiment, and for example, the tongs 1 and the seatbelt device 10 according to the present embodiment may be applied to a seatbelt device other than an automobile, and the scope does not deviate from the gist of the present invention. Of course, various changes can be made with.

1 Tong 2 First connection 3 Second connection 4 Tong body 5 Tong cover 10 Seat belt device 21 Fixing pin 21a First end 21b Second end 22 Shaft 22a First end 22b Second end 22c, 22d Recess 22e Slit 22f Inclined surface 23 Torsion bar 23a First end 23b Second end 24 Holder 24a Recess 24b Insertion 24c Bearing 24d Flange 24e Protrusion 24f Bracket 24g Recess 31 Support pin 41 Tong plate 42 First side wall 43 First Two side walls 51 First cover member 51a Opening 51b Recess 52 Second cover member 52a Arm 52b Intermediate 52c Belt holding 101 First retractor 102 Guide anchor 103 Second retractor 104 Buckle

Claims (5)

In the tongs connected to the shoulder belt that restrains the occupant's shoulder and the wrap belt that restrains the occupant's waist
The first connection part to which the shoulder belt is connected and
The second connection part to which the lap belt is connected and
A tongs body with a tongs plate that fits into the buckle,
A tongs cover that covers at least the first connection portion is provided.
The first connection portion includes a tubular fixing pin to which the end portion of the shoulder belt is fixed, and the tongs which are arranged on the outer periphery of the fixing pin so that the shoulder belt is wound and the first end portion is rotatable. A shaft supported by the main body, a torsion bar inserted into the fixing pin and the first end portion fixed to the shaft, and a tong body fixed to the shaft and the second end portion of the shaft can be rotated. A holder that supports and to which the second end of the torsion bar is fixed.
The tongs are characterized by that. The tongs according to claim 1, wherein the shaft includes a slit that guides a shoulder belt fixed to the fixing pin to the outer periphery of the shaft. The tongs according to claim 1, wherein the tongs cover includes a belt holding portion that can come into contact with the surface of a shoulder belt wound around the shaft. The second connecting portion includes a support pin to which the end portion of the wrap belt is connected and is fixed to the tong body, and the length of the support pin is shorter than the length of the fixing pin. The tongs according to claim 1. In a seatbelt device including a shoulder belt that restrains an occupant's shoulder, a lap belt that restrains an occupant's waist, and a shoulder belt and tongs connected to the lap belt.
The seatbelt device according to any one of claims 1 to 4, wherein the tongs are the tongs.