JP2006096168A - Belt threading member, seat belt device, and air belt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a belt threading member having an insertion hole to admit the insertion of an air belt, capable of eliminating a twist of the air belt within the belt insertion hole and allowing the gas to pass smoothly through the air belt near the insertion hole when the air belt is inflated. <P>SOLUTION: The part of the air belt 4 located near a narrow portion 14c of a sack-shaped belt 14 is inserted into a belt insertion hole 12 in a tong 7. The air belt 4 slides in such a way as moving forward and returning freely in the belt insertion hole 12. The body part 12a of the belt insertion hole 12 is in a slit form, the air belt 4 is free of twisting in the area to the belt insertion hole 12. When the gas pressure from an inflator 6 is applied to the narrow portion 14c, a swell-out part 17 swells out to form a gas passage 21, and the gas is introduced even to the shoulder side 14a of the sack-shaped belt 14. Because the swell-out part 17 inflates in such a way as intruding to an additional part 12b of the belt insertion hole 12, the cross-section of the gas passage 21 becomes sufficiently large. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an air belt used in a vehicle such as an automobile, a seat belt device including the air belt, and a belt hooking member such as a tongue through which the air belt is inserted.

  As a kind of seat belt device installed in an automobile, an air belt in which a part of the seat belt is inflated by gas pressure is well known.

  Japanese Patent Application Laid-Open No. 2003-31439 describes an air belt device in which an air belt is provided on each of a shoulder portion that is routed along the front surface of the upper body of the occupant and a lap portion that is routed along the waist of the occupant. Yes. In the air belt device of the same number, the shoulder portion and the lap portion are respectively connected to the tongue. The buckle device to which the tongue is attached is provided with an inflator, and two gas outlets are provided at the front end surface of the buckle device so as to supply the gas from the inflator to the air belt at the shoulder portion and the air belt at the lap portion. It has been. The tongue is provided with two gas inlets corresponding to the two gas outlets, one of the gas inlets communicates with the air belt of the shoulder portion, and the other gas inlet is the air belt of the lap portion. Communicating with

  The shoulder belt and the lap belt are connected to a normal belt on the opposite side of the tongue.

  The normal belt connected to the shoulder portion can be wound around the shoulder portion retractor, and the normal belt connected to the wrap portion can be wound around the wrap portion retractor.

  In the above-described air belt device, two retractors, a retractor for the shoulder portion for winding the shoulder portion side and a retractor for the wrap portion for winding the lap portion side, are necessary, which is expensive. At the same time, the weight of the air belt device increases.

  In order to use one retractor, it is conceivable to enlarge the belt insertion port of the tongue, connect the lap portion side air belt and the shoulder portion side air belt, and install an inflator on the lap anchor side of the lap portion side air belt. If a large belt insertion port is provided in the tongue as described above, the gas supplied from the inflator to the lap portion side passes through the tongue insertion portion and flows into the shoulder portion side, and the shoulder portion side can also expand. Further, when the shoulder part side normal belt is wound up by the retractor, the lap part side air belt can also move to the shoulder part side through the belt insertion opening of the tongue.

  However, when the air belt insertion port of the tongue is enlarged, there is a concern that the air belt in a normal state that is not inflated is twisted in the air belt insertion port.

In US Pat. No. 6,340,173, there is a series from the lap part to the shoulder part, and in the air belt in which the middle part is passed through the tongue, a hose-like member is inserted and arranged in the middle part, and the lap part And a structure in which gas can sufficiently flow between the shoulder portion and the shoulder portion. However, if the hose-like member is arranged in the air belt in this way, the thickness of the air belt increases, the tactile sensation deteriorates, and the occupant feels uncomfortable.
JP 2003-31439 A US Pat. No. 6,340,173

  In the belt passing member having an insertion port through which the air belt is inserted, the air belt is not twisted in the belt insertion port, and the gas smoothly passes through the air belt near the insertion port when the air belt is expanded. An object of the present invention is to provide a belt passing member.

  It is another object of the present invention to provide an air belt device provided with this belt passing member.

  Furthermore, an object of the present invention is to provide an air belt that is suitable for use in this belt hooking member and that does not have an excessively thick portion inserted through the belt hooking member.

  The belt hooking member according to claim 1 is a belt hooking member having an insertion port through which an air belt that expands due to gas pressure is inserted, and the insertion port includes a slit-shaped main body portion extending in the belt width direction; And an additional portion having a shape protruding from a part of the extending direction of the main body portion in a direction of increasing the slit width.

  According to a second aspect of the present invention, there is provided a belt hooking member according to the first aspect, wherein the belt hooking member is a tongue.

  The seat belt device according to claim 3 includes a belt hooking member having a seat belt insertion port, a seat belt inserted through the insertion port, and a retractor that winds up one end side of the seat belt, In the seat belt device, in which the portion of the seat belt inserted through the insertion port and the subsequent one end portion and the other end portion are a series of air belts that are inflated by gas pressure. The passing member is a belt passing member according to claim 1 or 2.

  The seat belt device according to claim 4 is the seat belt device according to claim 3, wherein the belt hooking member is a tongue, and the other end side of the air belt is connected to an inflator for inflating an air belt, or the inflator is disposed inside. It is characterized by being arranged.

  According to a fifth aspect of the present invention, the seat belt device according to the third or fourth aspect is provided with a bulge that partially bulges and enters the additional portion when gas pressure is applied to a portion of the air belt that is inserted into the insertion port. It is characterized in that an extractable portion is provided.

  The seat belt device according to claim 6 is provided with an inflatable portion that bulges partially when gas pressure is applied in the air belt in the air belt in which a middle portion is inserted into the belt passing member. It is characterized by.

  According to a seventh aspect of the present invention, the seat belt device according to the sixth aspect is characterized in that the swellable portion is formed by providing a flange on a part of the air belt.

  In the seat belt apparatus including the belt hooking member of the present invention, the air belt is inserted through the belt insertion port of the belt hooking member. Accordingly, the entire seat belt including the shoulder portion and the wrap portion can be wound and unwound by one retractor. The main body of the belt insertion port of the tongue is slit-shaped so that the air belt is not twisted.

  In the seat belt device provided with the belt hooking member, the air belt on one side (for example, the lap portion) of the belt hooking member and the air belt on the other side (for example, the shoulder portion) communicate with each other. When the gas from the inflator is supplied to one side, the gas quickly passes through the portion of the air belt that is passed through the belt passing member and flows into the other side, and the other side also expands. Let

  That is, the belt insertion port of the belt hooking member is provided with not only a slit-shaped main body portion but also an additional portion. Therefore, when a gas pressure is applied to the air belt, the portion of the air belt that is passed through the belt hooking member expands so as to enter the additional portion, and the one side (for example, the wrap portion) enters the air belt. A tunnel-like gas passage that communicates with the other side (for example, the shoulder portion) is formed. As a result, gas quickly flows from the one side of the air belt to the other side, and the other side of the air belt also expands quickly.

  Since the hose-like member is not inserted and arranged in the air belt, it is possible to prevent the air belt from becoming excessively thick.

  Specifically, the belt hooking member is preferably a tongue. In this case, the wrap portion and the shoulder portion can be configured to be inflated by an inflator disposed on the lap anchor side of the wrap portion.

  In the seat belt device of the present invention and the air belt thereof, an inflatable portion that bulges partially due to gas pressure is provided in a portion that is inserted into the belt insertion port of the belt hooking member. When the gas pressure is applied, the bulgeable portion bulges and the tunnel-like gas passage is quickly formed in the air belt. When this tunnel-like gas passage enters the additional portion of the belt passing member, the passage cross-sectional area of the gas passage becomes sufficiently large.

  In order to form the bulging portion, it is convenient and preferable to provide a ridge on a part of the air belt.

  Hereinafter, embodiments will be described with reference to the drawings. 1 is a perspective view of a seat belt device according to an embodiment, FIG. 2 is a perspective view of the seat belt device when the air belt is inflated, and FIG. 3 is a front view of a state in which the air belt extends linearly. FIGS. 4A and 4B show a state before expansion, and FIG. 5B shows a state before expansion. 4 is a perspective view of the tongue, FIG. 5 is a perspective view of the tongue with the air belt inserted through the insertion port, FIG. 6 is a schematic sectional view of the air belt, FIG. 7 is a sectional view of the air belt, FIG. Is a schematic cross-sectional view of a bag-like belt used for another air belt, FIG. 9 is a schematic cross-sectional view of a bag-like belt used for still another air belt, and FIG. 10 is a bag-like shape for an air belt of FIG. It is a disassembled perspective view of a belt.

  As shown in FIG. 1, the seat belt apparatus includes a retractor 1, a normal belt 2 connected to the retractor 1 so that the base end side can be wound and unwound, and a shoulder anchor 3 on which the normal belt 2 is passed. An air belt 4 having one end connected to the tip of the normal belt 2, a lap anchor 5 connected to the other end of the air belt 4, an inflator 6 attached to the lap anchor 5, and the air belt 4 are passed through. And a buckle device 8 into which the tongue 7 is inserted and locked.

  The retractor 1 and the lap anchor 5 are disposed on the side of the seat on the door side, and the shoulder anchor 3 is disposed on the B pillar, for example. The buckle device 8 is disposed on the other side of the seat and is attached to a seat frame or the like. As is well known, when the tongue 7 is inserted into the buckle device 8, the tongue 7 is latched by the buckle device 8, and when the press button 8 a is pressed, the tongue 7 is released from the buckle device 8.

  The structure of the tongue 7 will be described with reference to FIG.

  The tongue 7 has an insertion piece 10 to be inserted into the buckle device 8 and a gripping piece 11 connected to the insertion piece 10. The grip piece 11 is provided with a belt insertion opening 12.

  The belt insertion port 12 includes a narrow slit-shaped main body portion 12a extending in a direction perpendicular to the width direction of the air belt 3, that is, the insertion / extraction direction of the tongue 7, and a portion of the main body portion 12a on the opposite side to the insertion piece 10. And an additional portion 12b having a protruding shape. The additional portion 12b is located near the center in the extending direction of the main body portion 12a and protrudes in a substantially arc shape. When the total length in the longitudinal direction of the main body portion 12a is a and the maximum length in the longitudinal direction of the additional portion 12b is b, b / a is preferably about 0.3 to 0.6. Further, the maximum depth of the additional portion 12b is preferably about 40 to 80% of b.

  The air belt 4 is inserted into the belt insertion opening 12 as shown in FIG.

  The configuration of the air belt 4 will be described with reference to FIGS. 7 (a) is a sectional view taken along the line VII-VII in FIG. 3, and FIG. 7 (b) is a sectional view when the air belt is expanded. FIGS. 6A and 6B are schematic views in which a gap is interposed between the cloth pieces and the cover in order to clearly show the configuration of the air belt. The cross section of the air belt 4 is actually flat as shown in FIG.

  The air belt 4 includes a bag-like belt 14 and a cylindrical knit cover 15 surrounding the bag-like belt 14. The bag-like belt 14 is elongated from one end of the air belt 4 to the other end.

  As shown in FIG. 3, the bag-shaped belt 14 includes a shoulder wide portion 14a disposed in the shoulder portion, a wrap wide portion 14b disposed in the wrap portion, and a narrow portion 14c inserted in the tongue. Have The width of the narrow portion 14c is slightly smaller than the width of the belt insertion port 12 (the length a). The wide width portions 14a and 14b are folded long and narrow so as to form a band having the same width as the narrow width portion 14c. The knit cover 15 has a uniform width from one end to the other end.

  The air belt 4 and the normal belt 2 are joined by stitching. Note that both the bag-like belt 14 and the knit cover 15 are coupled to the normal belt 2. Both the bag-like belt 14 and the knit cover 15 are connected to the wrap anchor 5.

  As shown in FIG. 6 (a), the narrow portion 14c of the bag-like belt 14 is provided with two ribs 16 and 16 extending in the longitudinal direction of the air belt. A space 17 is a bulging portion 17. This bulgeable portion 17 faces the additional portion 12 b of the belt insertion opening 12 of the tongue 7.

  The flanges 16 and 16 are provided on the panel 18 disposed on the side farther from the insertion piece 10 of the tongue 7 out of the two panels 18 and 19 constituting the bag-like belt 14. The panels 18 and 19 are stitched together by a seam 20 extending along the collar portions 16 and 16, whereby the narrow width portion 14c is configured to maintain a thin band shape. The seam 20 may be torn when the air belt 4 is expanded.

  Next, the operation of the seat belt apparatus configured as described above will be described.

  In the state where the tongue 7 is attached to the buckle 8, the vicinity of the narrow portion 14 c of the bag-like belt 14 of the air belt 4 is inserted into the belt insertion opening 12 of the tongue 7. The air belt 4 slides so as to freely travel through the belt insertion opening 12. Since the winding force of the retractor 1 propagates to both the lap side and the shoulder side of the air belt 4, both the lap side and the shoulder side fit the occupant appropriately.

  Since the main body 12a of the belt insertion opening 12 has a narrow slit shape, the air belt 4 is not twisted between the belt insertion openings 12. The slit width of the main body portion 12a is preferably about 1.1 to 1.5 times the thickness of the air belt 4.

  When the automobile collides forward in this state, the gas from the inflator 6 is introduced into the wrap side wide portion 14b of the bag-like belt 14. When this gas pressure is applied to the narrow width portion 14c, the swellable portion 17 swells as shown in FIGS. 6 (b) and 7 (b), a gas passage 21 is formed, and the gas is passed through the bag-like belt 14. The shoulder side wide portion 14a is also introduced. In addition, since the swellable portion 17 expands so as to enter the additional portion 12b of the belt insertion port 12, the passage cross-sectional area of the gas passage 21 becomes sufficiently large. Therefore, the entire inflatable belt 4 is quickly inflated from one lap side to the shoulder side by one inflator 6 to receive the occupant.

  Thus, since the retractor 1 and the inflator 6 are both one, the configuration of the seat belt device is simple, and the cost reduction and weight reduction are realized. Moreover, the hose-like member is not inserted in the air belt 4, the tactile feeling of the air belt 4 is good, and there is no sense of incongruity.

  In this embodiment, the knit cover 15 is configured to flexibly expand and contract in the width direction but hardly extend in the longitudinal direction. That is, the knit cover 15 is subjected to a heat stretching process so as to almost eliminate elongation in the belt longitudinal direction (tensile direction). Therefore, when the bag-like belt 14 expands and expands in diameter, the knit cover 15 is shortened in the longitudinal direction, and the longitudinal length of the air belt 4 is shortened. As a result, the entire seat belt is tightened and the occupant is firmly protected.

  The above embodiment is an example of the present invention, and the present invention may take other forms. For example, in FIGS. 6 and 7, the swellable portion 17 is formed by providing two ridges 16, but only by one ridge 16 like the narrow portion 14 c ′ in FIG. 8. The bulgeable portion 17 may be formed.

  Further, in the present invention, as shown in FIGS. 9 and 10, an opening 23 is provided in the panel 18, and a patch cloth 25 with a collar 24 is sewn to the panel 18 so as to close the opening 23. The possible portion 26 may be formed.

  The panels 18 and 19 may be a series or may be separate.

  In the present invention, the additional portion 12b and the swellable portions 17 and 26 may be provided on the insertion piece 10 side of the belt insertion port 12.

  The belt hooking member may be a shoulder anchor.

1 is a perspective view of a seat belt device according to an embodiment. It is a perspective view of a seat belt device at the time of air belt expansion. It is a front view at the time of expansion | swelling of the state which extended the air belt before expansion | swelling linearly. It is a perspective view of a tongue. It is a perspective view of the tongue by which the air belt was inserted in the insertion port. It is a typical sectional view of an air belt. It is sectional drawing of an air belt. It is a typical sectional view of another bag belt for air belts. It is a typical sectional view of another bag belt for air belts. It is a disassembled perspective view of the bag-like belt for air belts of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Retractor 4 Air belt 7 Tongue 8 Buckle apparatus 10 Insertion piece 11 Grasp piece 12 Belt insertion port 12a Main body part 12b Additional part 14 Bag-like belt 14a, 14b Wide width part 14c Narrow part 15 Knit cover 16 Grow part 17, 26 Swelling Possible part

Claims (7)

In a belt passing member having an insertion port through which an air belt that is expanded by gas pressure is inserted,
The insertion port has a slit-shaped main body portion extending in the belt width direction;
A belt passing member comprising: an additional portion having a shape protruding from a part of the extending direction of the main body portion in a direction in which the slit width is increased.   The belt hooking member according to claim 1, wherein the belt hooking member is a tongue. A belt hooking member having a seat belt insertion port, a seat belt inserted through the insertion port, and
A retractor that winds up one end of the seat belt;
In the seat belt device, the portion of the seat belt inserted through the insertion port, and the subsequent one end portion and the other end portion are a series of air belts that are expanded by gas pressure. ,
The belt belt member according to claim 1 or 2, wherein the belt belt member is a belt belt member. In Claim 3, the belt hooking member is a tongue.
The seat belt device, wherein the other end side of the air belt is connected to an inflator for inflating an air belt, or the inflator is disposed inside.   5. The bulgeable portion that bulges partially when gas pressure is applied and enters the additional portion in the portion of the air belt that is inserted into the insertion port according to claim 3. A seat belt device characterized by the above. In the air belt where the middle part is inserted into the belt hooking member,
An inflatable belt comprising an inflatable portion that partially inflates when gas pressure is applied to the inflatable belt.   7. The air belt according to claim 6, wherein the bulgeable portion is formed by providing a ridge on a part of the air belt.

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