JP7186483B2 - Belt fixing method for tongs and seatbelt device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tongue belt fixing method and a seatbelt device, and more particularly to a tongue belt fixing method and seatbelt device suitable for a seatbelt device having a two-retractor system.

2. Description of the Related Art A vehicle such as an automobile is generally provided with a seat belt device for restraining an occupant in a seat having a seat on which the occupant sits and a backrest portion positioned on the back of the occupant. In recent years, from the viewpoint of improving the occupant's restraining force, a two-retractor system has been developed that has two retractors that individually wind a shoulder belt that restrains the shoulder of the occupant and a lap belt that restrains the waist of the occupant. .

In a seatbelt device having such a two-retractor system, the shoulder belt and the lap belt are often separated and individually fixed to the tongs. For example, in the invention described in Patent Document 1, a shoulder belt and a lap belt are arranged side by side and fixed to the tongs. Further, in the invention described in Patent Document 2, the shoulder belt and the lap belt are arranged vertically and fixed to the tongue.

JP-A-2005-239051 DE 102006033544 A1

In the inventions described in Patent Document 1 and Patent Document 2 mentioned above, since two points, one for fixing the shoulder belt and the other for fixing the lap belt, are required, the structure of the tongue becomes complicated. There is a problem that the shape of the

The present invention has been invented in view of such problems, and is a method for fixing tongues to a belt that can suppress complication of the tongue structure and an increase in the size of the tongue shape even when a two-retractor system is employed. It is an object to provide a method and a seat belt device.

According to the present invention, either the shoulder belt that restrains the shoulder of the occupant or the lap belt that restrains the waist of the occupant is inserted through the opening formed in the tongue and folded back to form the folded portion. a folding step of forming a folded portion by inserting the other belt of either the shoulder belt or the lap belt into the opening from the same side as the one belt and arranging it on the folded portion and a bonding step of integrally bonding the folded portion and the overlapping portion.

The folded portion and the overlapped portion may be arranged on a surface that does not come into contact with the occupant.

When the shoulder belt and the lap belt are composed of one continuous belt, the folding step and the overlapping step may be performed simultaneously.

When the shoulder belt and the lap belt are composed of different belts, the overlapping step includes folding back the leading end of the other belt and inserting it between the folded portions. You can

Further, according to the present invention, there is provided a seat belt device including a shoulder belt for restraining the shoulder of an occupant, a lap belt for restraining the waist of the occupant, and tongues to which the shoulder belt and the lap belt are fixed. The tongue has an opening through which the shoulder belt and the lap belt can be inserted, and either the shoulder belt or the lap belt is inserted through the opening and folded back. and the other of the shoulder belt and the lap belt is inserted into the opening from the same side as the one belt and placed on the folded portion. There is provided a seatbelt device comprising an overlapped portion, wherein the folded portion and the overlapped portion comprise a joint portion joined together.

The folded portion and the overlapped portion may be arranged on a surface that does not come into contact with the occupant.

The shoulder belt and the lap belt may be composed of one continuous belt.

The shoulder belt and the lap belt may be composed of different belts, and the other belt may have a leading end portion inserted between the folded portions.

The seat belt device may include a first retractor capable of retracting the shoulder belt and a second retractor capable of retracting the lap belt.

Further, the first retractor and the second retractor may be arranged outside or inside the seat on which the passenger sits.

According to the belt fixing method and the seatbelt device for the tongs according to the present invention described above, the shoulder belt and the lap belt can be fixed to the tongs simply by forming an opening through which the shoulder belt and the lap belt can be inserted. can. Therefore, even when a two-retractor system is employed, it is possible to prevent the tongue from becoming complicated in structure and from becoming large in size.

FIG. 3 is a partially enlarged view showing the vicinity of the tongue of the seatbelt device according to the first embodiment of the present invention; FIG. 2 is an explanatory view showing a belt fixing method of the tongs according to one embodiment of the present invention, (A) is a state in which the shoulder belt and the lap belt are composed of one belt, and (B) is the shoulder belt and the lap belt. (C) shows the state after the folding process and the overlapping process are completed, and (D) shows the state after the joining process is completed. It is sectional drawing of the state which fixed the shoulder belt and the lap belt to the tongue, (A) has shown this embodiment, (B) has shown the comparative example. It is the elements on larger scale which show the tongue periphery of the seatbelt apparatus which concerns on 2nd embodiment of this invention, (A) is a perspective view, (B) is sectional drawing. It is the elements on larger scale which show the tongue periphery of the seatbelt apparatus which concerns on 3rd embodiment of this invention, (A) is a perspective view, (B) is sectional drawing. It is the elements on larger scale which show the tongue periphery of the seatbelt apparatus which concerns on 4th embodiment of this invention, (A) is a perspective view, (B) is sectional drawing. BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the whole seatbelt apparatus structure which concerns on 1st embodiment, (A) has shown the 1st example, (B) has shown the 2nd example.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7B. Here, FIG. 1 is a partially enlarged view showing the vicinity of the tongue of the seatbelt device according to the first embodiment of the present invention. FIG. 2 is an explanatory view showing a belt fixing method for tongs according to an embodiment of the present invention. and a state in which the lap belt is inserted through the opening, (C) shows the state after the folding process and the overlapping process, and (D) shows the state after the bonding process.

A seat belt device 1 according to the first embodiment of the present invention includes, as shown in FIG. and a tongue 4 to which the lap belt 3 is fixed. The overall configuration of the seatbelt device 1 will be described later.

The shoulder belt 2 is a belt that extends from the occupant's shoulder on the opposite side of the buckle position to the buckle position after passing through the occupant's chest and abdomen when the tongue 4 is fitted to the buckle. .

The lap belt 3 is a belt arranged over a range from the waist of the occupant on the opposite side of the buckle position to the buckle position through the vicinity of the lower abdomen of the occupant when the tongue 4 is fitted to the buckle.

The shoulder belt 2 and the lap belt 3 are composed of one continuous belt, for example, as shown in FIG. 2(A). In this case, the shoulder belt 2 and the lap belt 3 are separated by a boundary portion X indicated by a dashed line in FIG.

For example, as shown in FIG. 1, the tongue 4 includes a metal tongue plate 41 that forms a substantially T-shaped skeleton, and a resin cover member 42 that covers the arms of the tongue plate 41. ing. The legs of the tongue plate 41 are formed with engagement holes 41a that engage with the buckles. The arm of the tongue plate 41 is formed with a slit-shaped opening 41b through which the shoulder belt 2 and the lap belt 3 can be inserted. The cover member 42 is attached or molded so as to cover the arms of the tongue plate 41 so as not to block the opening 41b.

The opening 41b has a width greater than the width of the shoulder belt 2 and the lap belt 3, and has a length greater than the height of the overlapping shoulder belt 2 and the lap belt 3. As shown in FIG. As shown in FIG. 1, only one opening 41b is formed in the tongue 4, and the tongue 4 can be used as a thru tong for simply inserting one belt that has been generally used in the past through the opening. have substantially the same shape.

The shoulder belt 2 also has a folded portion 21 that is inserted through the opening 41b of the tongue 4 and folded back. The folded portion 21 is arranged on the side that does not come into contact with the occupant. That is, when the tongues 4 are fitted to the buckle, the shoulder belt 2 is located on the opposite side of the first surface 4a facing the body of the occupant to be restrained, and comes into contact with the occupant to be restrained. It is inserted through the opening 41b toward the side of the second surface 4b that is arranged on the opposite side. After that, the shoulder belt 2 is folded back to the side that does not come into contact with the occupant (the same side as the second surface 4b of the tongue 4).

By forming the folded portion 21 in this manner, the shoulder belt 2 is wrapped around the tongue 4 . Therefore, it can also be said that the tongue 4 has one shaft around which the shoulder belt 2 can be wound.

In addition, the lap belt 3 has an overlapping portion 31 that is inserted through the opening 41 b of the tongue 4 and arranged on the folded portion 21 . At this time, the lap belt 3 is inserted through the opening 41 b from the same side as the shoulder belt 2 . In this embodiment, since the shoulder belt 2 and the lap belt 3 are continuous, when the shoulder belt 2 is passed through the opening 41b, the lap belt 3 is also passed through the opening 41b at the same time. .

In addition, the folded portion 21 and the overlapping portion 31 are provided with joint portions 5 that are integrally joined. The joint portion 5 is constructed by, for example, sewing together the folded portion 21 and the overlapping portion 31 using a suture thread. The joining method of the joining portion 5 is not limited to sewing, and other joining methods such as adhesion, welding, and riveting may be used.

Next, a method of fixing the tongue 4 to the belt will be described with reference to FIGS. 2(A) to 2(D). The method of fixing the tongues 4 according to the present embodiment includes a folding step of forming a folded portion by inserting the shoulder belt 2 through the opening 41b formed in the tongue 4 and folding back, and A superimposing step of forming an overlapped portion 31 by inserting from the same side as the shoulder belt 2 and arranging it on the folded portion 21, and a joining step of integrally joining the folded portion 21 and the overlapped portion 31. and have.

As shown in FIG. 2(A), the shoulder belt 2 and the lap belt 3 in this embodiment are composed of one continuous belt.

FIG. 2B shows a process of inserting the shoulder belt 2 and the lap belt 3 through the opening 41b. At this time, since the shoulder belt 2 and the lap belt 3 are composed of one continuous belt, the shoulder belt 2 and the lap belt 3 are folded at the boundary portion X to form the folded portion 6. 6 is inserted through the opening 41b. Therefore, in this step, the lap belt 3 is also inserted through the opening 41b at the same time.

In FIG. 2B, the tongue 4 has the first surface 4a side facing the occupant's body facing down and the second surface 4b side not in contact with the occupant facing up. It is drawn as it is. The folded portion 6 is inserted through the opening 41b from the lower side of the tongue 4, that is, from the side of the first surface 4a.

FIG. 2(C) is a step of forming the folded portion 21 and the overlapped portion 31 by folding back the folded portion 6 inserted through the opening 41 b onto the shoulder belt 2 . As described above, since the shoulder belt 2 and the lap belt 3 are composed of one continuous belt, forming the folded portion 21 also forms the overlapping portion 31 at the same time.

Further, in this embodiment, since the folded portion 6 is inserted from the side of the first surface 4a, the folded portion 21 and the overlapped portion 31 have surfaces that do not come into contact with the occupant, as shown in FIG. 2(C). side, that is, on the side of the second surface 4b of the tongue 4.

As shown in FIG. 2(D), the folded portion 21 and the overlapped portion 31 are sewn together with the same suture thread to form the joint portion 5 . By this belt process method, the shoulder belt 2 is wrapped around the shaft of the tongue 4 and fixed, the lap belt 3 is fixed to the shoulder belt 2, and as a result, the shoulder belt 2 and the lap belt 3 are fixed to the tongue 4. .

Next, advantages of the belt fixing structure according to the present embodiment will be described by comparing the belt fixing structure according to the present embodiment with the belt fixing structure described in Patent Document 2. FIG. Here, FIG. 3 is a cross-sectional view showing a state in which the shoulder belt and the lap belt are fixed to the tongue, (A) showing this embodiment and (B) showing a comparative example.

The comparative tongue 4' shown in FIG. 3B has a first shaft portion 41' for fixing the shoulder belt 2' and a second shaft portion 42' for fixing the lap belt 3'. A first shaft portion 41' and a second shaft portion 42' are arranged vertically.

In this comparative example, since the shoulder belt 2' and the lap belt 3' are composed of different separated belts, there are two points (first shaft portion 41' and second shaft portion 41') for fixing these belts. 42') is required. Therefore, in such a comparative example, the structure of the tongue 4' becomes complicated and the shape thereof becomes large.

Also, as in the illustrated comparative example, when the position of the first shaft portion 41' to which the shoulder belt 2' is fixed is higher than the position of the second shaft portion 42' to which the lap belt 3' is fixed, The belt path of the shoulder belt 2' that restrains the occupant's upper body (the path from the occupant's shoulder to the first shaft portion 41') shifts upward, making it difficult to control the restraining force.

On the other hand, the tongues 4 according to the present embodiment have substantially the same structure and shape as the conventional through tongs, but the lap belt 3 is fixed to the shoulder belt 2 while the shoulder belt 2 is fixed to the tongues 4. By doing so, the shoulder belt 2 and the lap belt 3 are fixed to the tongue 4 . Therefore, complication of the structure of the tongue 4 and an increase in size can be suppressed.

In this embodiment, since the lap belt 3 is sewn to the shoulder belt 2 , there is a possibility that the force of the lap belt 3 will be transmitted to the shoulder belt 2 . However, normally, when the seat belt is worn, the force applied to the lap belt 3 is maximized at the portion inserted through the opening 41b of the tongue 4 (the portion engaged with the tongue 4). The influence of the force 3 exerts on the shoulder belt 2 can be substantially ignored. Therefore, by adopting the belt fixing structure according to this embodiment, it is possible to substantially cut off the transmission of force between the belts.

Next, a seat belt device 1 according to another embodiment of the present invention will be described with reference to FIGS. 4(A) to 6(B). Here, FIG. 4 is a partially enlarged view showing the vicinity of the tongue of the seat belt device according to the second embodiment of the present invention, where (A) is a perspective view and (B) is a sectional view. FIG. 5 is a partially enlarged view showing the vicinity of the tongue of the seat belt device according to the third embodiment of the present invention, where (A) is a perspective view and (B) is a cross-sectional view. FIG. 6 is a partially enlarged view showing the vicinity of the tongue of the seat belt device according to the fourth embodiment of the present invention, where (A) is a perspective view and (B) is a cross-sectional view. In addition, in each figure, the same reference numerals are given to the same components as those of the above-described first embodiment, and redundant explanations are omitted.

In the second embodiment shown in FIGS. 4(A) and 4(B), the shoulder belt 2 and the lap belt 3 are composed of one continuous belt, and the lap belt 3 has a folded portion 32. , the shoulder belt 2 is provided with an overlapping portion 22. As shown in FIG. That is, in the second embodiment, the lap belt 3 is wrapped around the shaft of the tongue 4 and fixed, and the shoulder belt 2 is fixed to the lap belt 3, so that the shoulder belt 2 and the lap belt 3 are attached to the tongue 4. Fixed.

In FIG. 4B, the tongue 4 has the first surface 4a side facing the occupant's body facing down and the second surface 4b side not in contact with the occupant facing up. It is drawn as it is. The lap belt 3 is passed through the opening 41b from the upper side of the tongue 4, that is, from the side of the second surface 4b.

As shown in the first embodiment and the second embodiment described above, the belt wound around the tongue 4 and fixed may be either the shoulder belt 2 or the lap belt 3 . Either the shoulder belt 2 or the lap belt 3 is fixed to one belt fixed to the tongue 4 .

In the third embodiment shown in FIGS. 5(A) and 5(B), the shoulder belt 2 and the lap belt 3 are different belts, the shoulder belt 2 has a folded portion 21, and the lap belt 3 is provided with the overlapping portion 31 .

In this way, the shoulder belt 2 and the lap belt 3 may be composed of two separated belts instead of one continuous belt. With such a configuration, the shoulder belt 2 and the lap belt 3 can be fixed to the tongs 4 on the final line after the shoulder belt 2 and the lap belt 3 are manufactured on different manufacturing lines.

In the third embodiment, as in the first embodiment described above, the shoulder belt 2 is wrapped around the shaft of the tongue 4 and fixed, and the lap belt 3 is fixed to the shoulder belt 2, whereby the shoulder belt 2 is fixed. And the lap belt 3 is fixed to the tongue 4 .

Further, in the third embodiment, the tip portion 33 of the lap belt 3 may be inserted between the folded portions 21 of the shoulder belt 2 . With such a configuration, the edge portion of the belt formed at the folded portion 21 of the shoulder belt 2 can be covered with the bent portion 34 of the lap belt 3, and discomfort to the occupant due to the exposed edge portion can be reduced. . Further, the step of forming the bent portion 34 is performed in the overlapping step of forming the overlapped portion 31 of the lap belt 3 .

After the bent portion 34 is formed, the leading end portion 33 of the lap belt 3 is not inserted between the folded portions 21 of the shoulder belt 2, but is simply arranged so as to abut against the leading end portion of the shoulder belt 2. good too. According to such a configuration, the thickness of the joint portion 5 can be reduced as compared with the illustrated third embodiment.

In the fourth embodiment shown in FIGS. 6A and 6B, the shoulder belt 2 and the lap belt 3 are respectively different belts, the lap belt 3 has a folded portion 32, and the shoulder belt 2 is provided with the overlapping portion 22 .

In the fourth embodiment, similarly to the above-described second embodiment, the lap belt 3 is wound around the shaft of the tongue 4 and fixed, and the shoulder belt 2 is inserted through the opening 41b of the tongue 4, and then the lap belt 3 is attached. The shoulder belt 2 and the lap belt 3 are fixed to the tongs 4 by fixing the shoulder belt 2 and the lap belt 3 to the tongue 4 .

Further, in the fourth embodiment, the tip portion 23 of the shoulder belt 2 may be inserted between the folded portions 32 of the lap belt 3 . With such a configuration, the edge portion of the belt formed at the folded portion 32 of the lap belt 3 can be covered with the bent portion 24 of the shoulder belt 2, and discomfort to the occupant due to the exposure of the edge portion can be reduced. .

After the bent portion 24 is formed, the leading end portion 23 of the shoulder belt 2 is not inserted between the folded portions 32 of the lap belt 3, but is simply placed against the leading end portion of the lap belt 3. good too. According to this configuration, the thickness of the joint portion 5 can be reduced compared to the illustrated fourth embodiment.

Next, the overall configuration of the seatbelt device 1 according to the first embodiment described above will be described with reference to FIGS. 7(A) and 7(B). Here, FIG. 7 is a perspective view showing the overall configuration of the seat belt device according to the first embodiment, where (A) shows the first example and (B) shows the second example.

A first example of the seatbelt device 1 shown in FIG. The first retractor 11 and the second retractor 12 are arranged outside the seat S on which the passenger sits.

The first retractor 11 is arranged, for example, inside a pillar (not shown) that constitutes the vehicle body, and the second retractor 12 is arranged inside the pillar or under the seat S, for example. The shoulder belt 2 is inserted through a guide anchor 13 arranged on the surface of the pillar and locked inside the vehicle. A buckle 14 to which the tongue 4 is fitted is arranged on the side surface of the seat S opposite to the second retractor 12 .

A second example of the seat belt device 1 shown in FIG. The first retractor and the second retractor are arranged inside the seat S on which the passenger sits.

The first retractor is arranged inside the backrest portion of the seat S, for example, and the second retractor is arranged inside the seat portion of the seat S, for example. The shoulder belt 2 is pulled out into the vehicle from a belt guide 15 arranged on the shoulder of the seat S, for example. The lap belt 3 is drawn into the vehicle through a slit 16 formed in the seat S, for example. A buckle 14 to which the tongue 4 is fitted is arranged on the side surface of the sheet S opposite to the slit 16 .

Although the illustrated seat belt device 1 is assumed to be applied to the front seats of a vehicle, it can also be applied to the rear seats and to vehicles other than vehicles.

The present invention is not limited to the above-described embodiments, and various modifications are possible without departing from the scope of the present invention.

1 Seatbelt Device 2 Shoulder Belt 3 Lap Belt 4 Tongue 4a First Surface 4b Second Surface 5 Joint Part 6 Folding Part 11 First Retractor 12 Second Retractor 13 Guide Anchor 14 Buckle 15 Belt Guide 16 Slit 21 Shoulder Belt Folding Portion 22 Shoulder belt overlapping portion 23 Shoulder belt tip 24 Shoulder belt bent portion 31 Lap belt overlapping portion 32 Lap belt folded portion 33 Lap belt tip 34 Lap belt bent portion 41 Tongue plate 41a Engaging hole 41b Opening 42 Cover member 2' Shoulder belt 3' of comparative example Lap belt 4' of comparative example Tong 41' of comparative example First shaft portion 42' of comparative example Second shaft portion S of comparative example Seat X boundary

Claims (10)

a folding step of forming a folded portion by inserting either a shoulder belt for restraining the shoulder of the occupant or a lap belt for restraining the waist of the occupant through an opening formed in the tongue and folding the belt; ,
a superposing step of forming an overlapping portion by inserting either the shoulder belt or the lap belt into the opening from the same side as the one belt and arranging it on the folded portion; ,
a bonding step of integrally bonding the folded portion and the overlapped portion;
A belt fixing method for tongs, comprising: 2. The method of fixing a belt of tongues according to claim 1, wherein said folded portion and said overlapped portion are arranged on a side not in contact with said occupant. 2. The belt fixing method for tongs according to claim 1, wherein said shoulder belt and said lap belt are composed of one continuous belt, and said folding step and said overlapping step are performed at the same time. 2. The shoulder belt and the lap belt are composed of different belts, respectively, and the step of overlapping includes a step of folding back the leading end of the other belt and inserting it between the folded portions. The belt fixing method of the tongs described in . A seat belt device including a shoulder belt that restrains the shoulder of an occupant, a lap belt that restrains the waist of the occupant, and tongues to which the shoulder belt and the lap belt are fixed,
The tongue has an opening through which the shoulder belt and the lap belt can be inserted,
Either the shoulder belt or the lap belt has a folded portion formed by being inserted through the opening and folded back,
The other belt, either the shoulder belt or the lap belt, is provided with an overlapping portion configured by being inserted through the opening from the same side as the one belt and placed on the folded portion. ,
the folds and overlaps comprise joints that are joined together;
A seat belt device characterized by: 6. The seatbelt device according to claim 5, wherein the folded portion and the overlapped portion are arranged on a side that does not come into contact with the occupant. 6. The seatbelt device according to claim 5, wherein the shoulder belt and the lap belt are composed of one continuous belt. 6. The seatbelt device according to claim 5, wherein the shoulder belt and the lap belt are configured by different belts, and the other belt has a leading end portion inserted between the folded portions. The seatbelt device according to claim 5, comprising a first retractor capable of retracting the shoulder belt and a second retractor capable of retracting the lap belt. 10. The seatbelt device according to claim 9, wherein said first retractor and said second retractor are arranged outside or inside a seat on which said passenger sits.

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