WO2023119845A1 - Airbag device for motorcycle - Google Patents

Airbag device for motorcycle Download PDF

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Publication number
WO2023119845A1
WO2023119845A1 PCT/JP2022/039659 JP2022039659W WO2023119845A1 WO 2023119845 A1 WO2023119845 A1 WO 2023119845A1 JP 2022039659 W JP2022039659 W JP 2022039659W WO 2023119845 A1 WO2023119845 A1 WO 2023119845A1
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WO
WIPO (PCT)
Prior art keywords
inflator
main pipe
motorcycle
gas
airbag
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PCT/JP2022/039659
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French (fr)
Japanese (ja)
Inventor
光男 野上
真 夫馬
Original Assignee
オートリブ ディベロップメント エービー
光男 野上
真 夫馬
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Application filed by オートリブ ディベロップメント エービー, 光男 野上, 真 夫馬 filed Critical オートリブ ディベロップメント エービー
Publication of WO2023119845A1 publication Critical patent/WO2023119845A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J27/00—Safety equipment
    • B62J27/20—Airbags specially adapted for motorcycles or the like

Definitions

  • the present invention relates to a motorcycle airbag device.
  • an airbag module including an airbag, an inflator, and a retainer is arranged between a steering wheel and an occupant's seat, and a lower portion of the retainer of the airbag module is attached to an upper portion of a pair of left and right main frames of a vehicle body frame. is supported through a support frame. Inside the retainer, an airbag is attached above the inflator, and the upper side of the airbag is covered with a lid.
  • an airbag is arranged along a cylindrical steering handle whose both ends are closed, and a communicating hole of the steering handle is communicated with the inside of the airbag.
  • the inflator is housed in a stem pipe inserted through the head pipe at the front end of the vehicle body frame, and the upper end of the stem pipe and the steering wheel are arranged to guide the gas generated in the stem pipe with the operation of the inflator to the airbag. It is connected to the handle by a conduit.
  • Patent Literature 1 regarding a retainer that houses an inflator, there is a problem that the weight and size of the entire airbag module are relatively large from the viewpoint of requiring a structure that ensures pressure resistance strength at the initial stage of airbag deployment.
  • the location of the airbag module is limited to the upper part of the main frame in front of the passenger seat, the degree of layout freedom is low.
  • Patent Document 2 since the airbag and the inflator are arranged in the steering system, there is a problem that the position of the airbag relative to the occupant moves due to steering by the occupant, and the deployment direction of the airbag lacks stability. In addition, the location of the airbag and the inflator is limited to the steering system, so the degree of layout freedom is low.
  • a motorcycle airbag device is an airbag device mounted on a motorcycle having a vehicle body frame having a main pipe, comprising an airbag and an inflator that supplies gas for inflation and deployment of the airbag.
  • the inflator is provided inside the main pipe
  • the airbag is provided outside the main pipe
  • gas for inflation and deployment from the inflator is supplied to the airbag through the gas flow pipe. It is configured as follows.
  • the inflator is provided inside the main pipe, which is a part of the vehicle body frame that requires high rigidity, the main pipe has sufficient pressure resistance to receive the impact from the inflator that occurs at the initial stage of deployment of the airbag. be able to.
  • the inflator is provided inside the main pipe
  • the airbag is provided outside the main pipe, so both can be separately arranged. Therefore, it is possible to increase the degree of freedom in layout regarding the placement of both the inflator and the airbag.
  • both are positioned on the side of the main pipe rather than on the steering system of the motorcycle, it is possible to contribute to ensuring stability in the deployment direction of the airbag.
  • the present invention can be applied to any type of motorcycle having the following frames. Scooter, Adventure, Tourer, Sports Tourer, Scrabbler, Classic (retro), American (cruiser), Naked, Streetfighter, Off-road Supermotard, Supersport, Street, Minibike, Tricycle Trike, Four-wheel Buggy etc., and can also be applied to personal watercraft that move on the surface of water such as seas, lakes, rivers, etc., snowmobiles that move on snow, sidecars that are connected to the sides of motorcycles, and the like.
  • FIG. 1 is a perspective view showing the appearance of a motorcycle equipped with an airbag device according to an embodiment
  • FIG. 2 is a perspective view showing the motorcycle of FIG. 1 with some mounted parts such as a seat removed.
  • FIG. 2 is a perspective view showing a body frame of the motorcycle of FIG. 1; 1 is an enlarged side view of the front side of a vehicle body frame showing an airbag device according to an embodiment together with a main pipe of the vehicle body frame;
  • FIG. FIG. 5 is an enlarged side cross-sectional view schematically showing part A of FIG. 4 ;
  • FIG. 2 is a perspective view showing a state in which an airbag is inflated and deployed for the motorcycle of FIG. 1;
  • FIG. 11 is an enlarged side view of the front side of the vehicle body frame showing an airbag device according to a modification of the embodiment together with a main pipe of the vehicle body frame;
  • FIG. 8 is an enlarged side cross-sectional view schematically showing a B portion of FIG. 7;
  • FIG. 2 is a diagram showing an example of arrangement of an inflator of an airbag device with respect to a vehicle body frame of a motorcycle;
  • FIG. 4 is a diagram showing another arrangement example of the inflator of the airbag device with respect to the body frame of the motorcycle;
  • top and bottom, left and right, and front and back are defined as follows.
  • the direction in which the occupant is facing is called the front, and the opposite direction is called the rear.
  • the right side of the occupant is referred to as the right direction
  • the left side of the occupant is referred to as the left direction.
  • the direction of the occupant's head is referred to as the upward direction
  • the direction of the occupant's waist is referred to as the downward direction.
  • a motorcycle 1 has a body frame 2 forming its skeleton, a seat 3 on which an occupant straddles, and a steering system 4 steered by the occupant. .
  • a seat 3 is provided on the rear upper side of the vehicle body frame 2, and a steering system 4 is supported at the front end of the vehicle body frame 2 so as to be steerable.
  • the steering system 4 supports a front wheel on the lower end of the front fork 5 and has a handle 6 on the upper end of the front fork 5 .
  • An airbag device 10 is mounted between the seat 3 and the steering system 4 .
  • the vehicle body including the vehicle body frame 2 is partially covered with various covers, one of which includes the module cover 11 of the airbag device 10 .
  • a meter system 12 is arranged in front of the module cover 11
  • a fuel tank 13 is arranged behind the module cover 11
  • a seat 3 is arranged behind the fuel tank 13 .
  • An engine 14 is mounted below the fuel tank 13 .
  • the body frame 2 has main pipes 21, 21.
  • the main pipes 21 , 21 form a main frame of the motorcycle 1 and support various main parts of the motorcycle 1 .
  • main pipes 21 , 21 support fuel tank 13 and engine 14 .
  • a pair of main pipes 21 , 21 are provided on the left and right and extend so as to surround the four corners of the engine 14 .
  • the main pipe 21 has strength to withstand vibrations and impacts from the engine 14 and the road surface, as well as rigidity against bending and twisting.
  • the main pipe 21 is made of metal such as steel or aluminum alloy, for example. Further, the main pipe 21 is composed of a pipe-shaped portion.
  • the body frame 2 also has a head pipe 22, a pair of left and right pivot frames 23, 23, and a pair of left and right seat frames 24, 24.
  • a head pipe 22 and pivot frames 23, 23 are connected by main pipes 21, 21, and seat frames 24, 24 extend rearward from upper portions of the pivot frames 23, 23.
  • the head pipe 22 is provided in the center of the vehicle width at the front end of the vehicle body frame 2 and rotatably supports the front fork 5 of the steering system 4 .
  • a seat 3 is provided on the seat frames 24 , 24 .
  • the main pipes 21, 21 have, for example, top tubes 21a, 21a and down tubes 21b, 21b.
  • the top tubes 21 a , 21 a constitute tank rails and support the fuel tank 13 .
  • the engine 14 is mounted in front of the pivot frames 23, 23 between the top tubes 21a, 21a and the down tubes 21b, 21b.
  • the vehicle body frame 2 described above is an example of the frame structure (cradle-type frame) of the motorcycle 1, but as long as it has a pipe-shaped portion for accommodating an inflator 32 (see FIG. 4) described later of the airbag device 10 ( That is, as long as it has the main pipe 21), various frame structures can be used.
  • Frame constructions such as single cradle frame, double cradle frame, semi-double cradle frame, diamond frame, backbone frame, truss frame, twin spar frame can be used, to name a few.
  • the airbag device 10 has an airbag 31 and an inflator 32 that supplies gas for inflation and deployment to the airbag 31 .
  • the airbag device 10 also has a housing 33 that accommodates the airbag 31 .
  • the module cover 11 described above is attached to a portion (upper portion) of the housing 33 so as to cover the airbag 31 .
  • the module cover 11 is made of resin, for example.
  • the airbag 31 and the housing 33 are modularized (unitized) to form an airbag module 34 , and the inflator 32 is independent from the airbag module 34 .
  • the airbag module 34 is modularized including the module cover 11 .
  • the airbag 31 is a bag body, and is inflated and deployed upon receiving gas supplied from the inflator 32 .
  • the airbag 31 is formed by joining (for example, sewing or adhering) a plurality of base fabrics made of, for example, nonwoven fabrics at appropriate positions.
  • the airbag 31 is stored in the housing 33 in a folded state, for example.
  • the inflator 32 is electrically connected to a control device (not shown) and operates when the motorcycle 1 collides. For example, when the motorcycle 1 collides, the impact is detected by an impact sensor, and a signal detected by the impact sensor is sent to the control device. When the controller determines that the airbag system 10 needs to be activated, it sends an ignition current to the inflator 32 . As a result, when the inflator 32 is activated, the inflator 32 instantly generates gas. In this embodiment, the generated inflation and deployment gas is supplied from the inflator 32 to the airbag 31 through the gas flow path pipe 40 .
  • the inflator 32 can be used as the inflator 32, such as those filled with a gas generating agent, compressed gas, or both. That is, the inflator 32 may be of a pyrotype that generates gas by combustion of explosives, or of a hybrid type that combines explosives and compressed gas. However, the hybrid type is preferable from the viewpoints of mountability of the inflator 32 in the main pipe 21 and suppression of thermal load on the airbag 31 .
  • the inflator 32 is divided into an explosive charging chamber and a compressed gas charging chamber via a partition in the bottomed cylindrical body 51 .
  • the inflator 32 has a gas release portion 52 via a sealing plate on the opposite side of the compressed gas charging chamber from the explosive charging chamber.
  • the airbag device 10 is provided in association with the main pipe 21 among the constituent elements of the vehicle body frame 2 .
  • the airbag 31 is provided outside the main pipe 21 and the inflator 32 is provided inside the main pipe 21 .
  • the inflator 32 is provided inside the down tube 21b of the main pipe 21.
  • the down tube 21b is formed, for example, as a pipe-shaped portion extending rearward from the lower portion of the head pipe 22.
  • the frame structure shown in FIG. 4 is partially different from the frame structure shown in FIG.
  • the airbag module 34 including the airbag 31 is attached to the outer surface of the main pipe 21 outside the main pipe 21 .
  • the housing 33 of the airbag module 34 is attached to the outer surface of the top tube 21a.
  • the housing 33 is formed, for example, in the shape of a shallow plate as a whole, and the airbag 31 is fixed to the shallow plate-like bottom wall 33a. Then, the upper portion of the housing 33 is covered with the module cover 11 .
  • the housing 33 has, for example, fastening points 35, 35 fixed to the top tube 21a by bolts or the like.
  • FIG. 5 shows an enlarged view of the configuration around the gas flow pipe 40.
  • the airbag 31 has a gas inlet 31a, and the main pipe 21 has a gas outlet 21c.
  • a gas flow pipe 40 connects the gas inlet 31a and the gas outlet 21c.
  • the gas introduction port 31a is an opening formed in the lower surface of the airbag 31, and gas for inflation and deployment from the inflator 32 is introduced into the airbag 31 through the gas introduction port 31a.
  • the gas outlet 21c is an opening formed in the upper surface of the down tube 21b, and the gas for inflation and deployment from the inflator 32 is led out of the down tube 21b through the gas outlet 21c.
  • Each opening diameter of the gas introduction port 31 a and the gas outlet port 21 c is formed to be approximately the same as the pipe diameter of the gas flow path pipe 40 .
  • the gas discharge part 52 is located near the gas outlet 21c. Also, the gas inlet 31 a and the gas outlet 21 c are positioned on the axis of the gas flow pipe 40 . A gas discharge portion 52 is also located on this axis. That is, the gas inlet 31a, the gas outlet 21c, and the gas discharge portion 52 are positioned on substantially the same line. Such an arrangement allows the gas from the gas discharge portion 52 to be quickly introduced into the gas introduction port 31a.
  • the gas flow pipe 40 is made of metal, for example.
  • the gas flow pipe 40 is positioned between the top tube 21 a and the down tube 21 b of the main pipe 21 .
  • the gas flow pipe 40 is connected to the housing 33 and the main pipe 21 so as to connect the gas inlet 31a and the gas outlet 21c.
  • the gas flow pipe 40 is a cylindrical member with both upper and lower ends opened, and extends in the vertical direction.
  • An upper end 40 a of the gas flow pipe 40 is formed into a flange shape and fixed to the housing 33 via fastening means 60 .
  • the upper end 40 a of the gas flow pipe 40 is fixed to the bottom wall 33 a of the housing 33 via fastening means 60 including bolts 61 and nuts 62 .
  • the fastening means 60 are also used to fix the airbag 31 to the bottom wall 33a.
  • a lower end 40 b of the gas flow pipe 40 is formed into a flange shape and welded to the main pipe 21 . Specifically, the lower end 40b of the gas flow pipe 40 is welded to the upper surface of the down tube 21b in the vicinity of the gas outlet 21c.
  • the gas flow pipe 40 is sized so that the inflator 32 can be inserted through it. Therefore, the pipe diameter of the gas flow pipe 40 is larger than the outer diameter of the cylindrical body 51 of the inflator 32 . With this size relationship, the inflator 32 is inserted into the gas flow pipe 40 from the upper end 40a side of the gas flow pipe 40, and then discharged from the lower end 40b of the gas flow pipe 40. It can be provided inside the down tube 21b.
  • the storage space 70 for storing the inflator 32, and the storage space 70 includes the gas outlet port 21c. , a closed space in the down tube 21b.
  • the storage space 70 communicates with the space inside the gas flow pipe 40 and also communicates with the space inside the airbag 31 . These three spaces are hermetically closed as a whole. Therefore, the gas from the inflator 32 is supplied to the airbag 31 without escaping to the outside.
  • the storage space 70 may be, for example, a space formed along the longitudinal direction of the down tube 21b. In this case, both longitudinal ends of the down tube 21b are closed. In another example, the storage space 70 may be a partial space in the longitudinal direction of the down tube 21b. In this case, a partition wall or a sealing member is provided between both ends of the down tube 21b in the longitudinal direction to form a closed space. For example, a seal member 71 may be interposed between the outer surface of the inflator 32 and the inner surface of the main pipe 21 (down tube 21b). At least part of the storage space 70 is configured by such a sealing member 71 .
  • the sealing member 71 can be composed of, for example, an O-ring.
  • the inflator 32 is stored in the storage space 70 without being exposed to the outside of the storage space 70. That is, all constituent parts of the inflator 32 including the cylindrical body 51 and the gas discharge portion 52 are housed in the housing space 70 .
  • the inflator 32 is fixed to the main pipe 21 (down tube 21b). For example, it is fixed with a screw or the like. Alternatively, it is fixed by crimping a separately provided attachment.
  • gas for inflation and deployment is released from the gas release portion 52 of the inflator 32, flows into the gas flow path pipe 40, and then into the airbag 31.
  • the airbag 31 supplied with gas rapidly inflates, ruptures the module cover 11, and inflates and deploys toward the front of the occupant (see FIG. 6).
  • the inflator 32 is provided inside the intermediate frame pipe 21 e of the main pipe 21 .
  • the intermediate frame pipe 21e connects the top tube 21a and the down tube 21b.
  • the intermediate frame pipe 21e has a gas outlet 121c and a storage space 170, like the gas outlet 21c and the storage space 70 of the down tube 21b.
  • the gas outlet 121c is formed in the front surface of the intermediate frame pipe 21e
  • the storage space 170 is a closed space in the intermediate frame pipe 21e except for the gas outlet 121c.
  • the airbag module 34 including the gas flow path pipe 140 is modularized.
  • the gas flow pipe 140 is a cylindrical member with both ends opened, which is formed by bending metal, for example, and extends in a substantially J-shape.
  • the gas passage pipe 140 is connected to the housing 33 and the intermediate frame pipe 21e so as to connect the gas inlet 31a of the airbag 31 and the gas outlet 121c of the intermediate frame pipe 21e.
  • one end 140 a of the gas flow pipe 140 is formed into a flange shape and welded to the housing 33 .
  • one end 140 a is welded to the bottom wall 33 a of the housing 33 .
  • the airbag 31 is fixed to the bottom wall 33a of the housing 33 in the vicinity of the welded portion by the fastening means 60 (bolts 61 and nuts 62).
  • the other end 140b of the gas flow pipe 140 is formed in a flange shape and fixed to the intermediate frame pipe 21e via bolts 161 (fastening means).
  • the other end 140b is fixed via a bolt 161 to the front surface of the intermediate frame pipe 21e in the vicinity of the gas outlet 121c.
  • the gas flow pipe 140 does not have to be formed in a size that allows the inflator 32 to pass through.
  • the inflator 32 is inserted into the main pipe 21 through an insertion hole 200 formed in the main pipe 21 .
  • the insertion hole 200 is formed in the upper surface of the top tube 21 a , and the inflator 32 is inserted through the insertion hole 200 through the top tube 21 a into the intermediate frame pipe 21 e and arranged in the storage space 170 .
  • the insertion hole 200 is covered by a mounted component on the motorcycle 1, such as the fuel tank 13.
  • meter system 12 may cover insertion hole 200 . In this way, the existing mounting parts of the motorcycle 1 can be effectively used to hide the insertion hole 200, and a structure can be provided in which the inflator 32 is not directly exposed to water.
  • the inflator 32 can be arranged inside the top tube 21 a of the main pipe 21 .
  • an inflator 32' may be provided inside the top tube 21a, as indicated by the dashed line in FIG.
  • a plurality of inflators 32 may be provided at a plurality of locations within the main pipe 21 .
  • the inflator 32 may be arranged in each of the pair of left and right down tubes 21b, 21b.
  • the inflators 32, 32' may be arranged on the intermediate frame pipe 21e and the top tube 21a, respectively.
  • the inflator 32 may be arranged on each of the top tube 21a and the down tube 21b in the semi-double cradle frame.
  • the inflators 32 may be arranged in the pair of left and right top tubes 21a, 21a and the pair of left and right down tubes 21b, 21b in the double cradle frame.
  • a gas flow path pipe 40 (140) is provided corresponding to each inflator 32, and the inflation/deployment gas from each inflator 32 flows into each corresponding gas flow. It is preferable to supply the airbag 31 via the conduit pipe 40 .
  • the airbag devices 10 and 100 according to the embodiments are mounted on the motorcycle 1 having the vehicle body frame 2 having the main pipe 21.
  • the airbag 31 provided outside the main pipe 21, and an inflator 32 provided inside the main pipe 21 .
  • Inflation/deployment gas from the inflator 32 is supplied to the airbag 31 through the gas flow pipes 40 and 140 .
  • the main pipe 21 receives the impact from the inflator 32 that occurs at the initial stage of airbag deployment. Pressure resistance strength can be secured. This eliminates the need for a strength design that is conventionally required for a retainer that accommodates an inflator.
  • the housing 33 that accommodates the airbag 31 does not need to have a large strength, so the design and structure of the housing 33 can be simplified.
  • This is further expected by enclosing a part (housing 33) of the airbag module 34 with the top tube 21a, the head pipe 22, the down tube 21b, and the like having high rigidity. Therefore, the housing 33 can be of a simple structure as long as it is sufficient to secure the storability of the airbag 31, the fastening structure (fastening point 35) and waterproofness of the airbag module 34, and the minimum necessary housing strength. can. Therefore, the overall size and weight of the airbag devices 10 and 100 can be reduced.
  • both can be separately arranged. Therefore, it is possible to increase the degree of layout freedom regarding the arrangement of both the inflator 32 and the airbag 31 .
  • layouts as shown in FIGS. 4, 7, 9 and 10 are possible.
  • both are positioned on the side of the main pipe 21 instead of the position of the steering system 4 of the motorcycle 1, it is possible to contribute to ensuring stability in the deployment direction of the airbag 31 as well.
  • the gas for inflation/deployment from the inflator 32 can be supplied to the airbag 31 through the gas flow path pipes 40 and 140 .
  • the inflation/deployment gas from the inflator 32 is ejected into the storage spaces 70 and 170 in the main pipe 21 and then flows into the gas flow path pipes 40 and 140.
  • the main pipe 21 has high rigidity as described above. . By effectively utilizing this high rigidity, the portions of the main pipe 21 having the storage spaces 70 and 170 function as gas pipes.
  • the vehicle mountability of the airbag module 34 is also improved. Furthermore, by using the hybrid inflator 32, it is not necessary to provide the airbag 31 with a thick reinforcing cloth having high heat resistance, so that the size and weight of the airbag module 34 can be reduced.
  • an airbag mounted on a motorcycle having a body frame having a main pipe, an airbag; an inflator that supplies gas for inflation and deployment to the airbag, The inflator is provided inside the main pipe, The airbag is provided outside the main pipe, An airbag device for a motorcycle, wherein the inflation and deployment gas from the inflator is supplied to the airbag through a gas flow pipe.
  • the airbag has a gas inlet, The main pipe has a gas outlet, The motorcycle airbag device according to claim 1, wherein the gas inlet and the gas outlet are connected by the gas flow pipe.
  • Emodiment 3 further comprising a housing that accommodates the airbag and is attached to the outer surface of the main pipe; 3.
  • the motorcycle airbag device according to claim 2 wherein the gas flow pipe is connected to the housing and the main pipe so as to connect the gas inlet and the gas outlet.
  • the gas flow pipe is welded to one of the housing and the main pipe and fixed to the other of the housing and the main pipe via fastening means.
  • the inflator has a gas release portion for releasing the gas for inflation and deployment, 5.
  • a motorcycle airbag device wherein at least part of said closed space is constituted by a seal member interposed between the outer surface of said inflator and the inner surface of said main pipe.
  • Emodiment 10 10. The motorcycle airbag device according to any one of claims 1 to 9, wherein the inflator is provided inside the top tube of the main pipe.
  • Emodiment 11 10. The motorcycle airbag device according to any one of claims 1 to 9, wherein the inflator is provided inside the down tube of the main pipe.
  • the inflator is provided inside an intermediate frame pipe that connects the top tube and the down tube of the main pipe.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

Disclosed is an airbag device for a motorcycle which makes it possible to achieve a reduction in size and weight by effectively using the vehicle body frame of the motorcycle and to ensure freedom of layout.　The airbag device 10 is mounted to a motorcycle 1 comprising a vehicle body frame 2 that has a main pipe 21. The airbag device 10 comprises an airbag 31 provided to the exterior of the main pipe 21 and an inflator 32 provided in the interior of the main pipe 21. An inflating/deploying gas from the inflator 32 is supplied to the airbag 31 via a gas flow pipe 40.

Description

オートバイ用エアバッグ装置motorcycle airbag device
　本発明は、オートバイ用エアバッグ装置に関する。 The present invention relates to a motorcycle airbag device.
　オートバイ用エアバッグとして、操縦者が着用するタイプと、オートバイに搭載されるタイプが知られている。後者は、例えば特許文献１及び２に開示されている。 Two types of motorcycle airbags are known: those worn by the operator and those mounted on motorcycles. The latter is disclosed, for example, in US Pat.
　特許文献１では、エアバッグ、インフレータ及びリテーナを含むエアバッグモジュールを、操舵ハンドルと乗員用シートとの間に配置し、エアバッグモジュールのリテーナの下部を、車体フレームの左右一対のメインフレームの上部に支持フレームを介して支持している。リテーナ内では、インフレータの上側にエアバッグが取り付けられ、エアバッグの上方がリッドによって覆われている。 In Patent Document 1, an airbag module including an airbag, an inflator, and a retainer is arranged between a steering wheel and an occupant's seat, and a lower portion of the retainer of the airbag module is attached to an upper portion of a pair of left and right main frames of a vehicle body frame. is supported through a support frame. Inside the retainer, an airbag is attached above the inflator, and the upper side of the airbag is covered with a lid.
　特許文献２では、両端が閉じた円筒状の操向ハンドルに沿ってエアバッグを配置し、操向ハンドルの連通孔をエアバッグ内と連通させている。また、インフレータを、車体フレームの前端のヘッドパイプ内を挿通したステムパイプ内に収納し、インフレータの作動に伴ってステムパイプ内に生じたガスをエアバッグに導くべく、ステムパイプの上端と操向ハンドルとを導管により接続している。 In Patent Document 2, an airbag is arranged along a cylindrical steering handle whose both ends are closed, and a communicating hole of the steering handle is communicated with the inside of the airbag. In addition, the inflator is housed in a stem pipe inserted through the head pipe at the front end of the vehicle body frame, and the upper end of the stem pipe and the steering wheel are arranged to guide the gas generated in the stem pipe with the operation of the inflator to the airbag. It is connected to the handle by a conduit.
特開２０１９－１２３３３８号公報JP 2019-123338 A 特開２００３－２３７６６２号公報JP-A-2003-237662
　しかし、従来のオートバイ用エアバッグ装置には改善の余地がある。例えば、特許文献１では、インフレータを収納するリテーナに関して、エアバッグ展開初期の耐圧強度を担保する構造が求められる観点から、エアバッグモジュール全体としての重量及びサイズが比較的大きくなるという問題がある。また、エアバッグモジュールの配置場所に関しても、乗員用シート前方のメインフレームの上部に限定されるため、レイアウトの自由度が低い。 However, conventional motorcycle airbag devices have room for improvement. For example, in Patent Literature 1, regarding a retainer that houses an inflator, there is a problem that the weight and size of the entire airbag module are relatively large from the viewpoint of requiring a structure that ensures pressure resistance strength at the initial stage of airbag deployment. In addition, since the location of the airbag module is limited to the upper part of the main frame in front of the passenger seat, the degree of layout freedom is low.
　また、特許文献２では、エアバッグ及びインフレータを操舵系に配置しているため、乗員の操舵によって乗員に対するエアバッグの相対位置が動き、エアバッグの展開方向の安定性に欠けるという問題がある。また、エアバッグ及びインフレータの配置場所に関しても、操舵系に限定されるため、レイアウトの自由度が低い。 In addition, in Patent Document 2, since the airbag and the inflator are arranged in the steering system, there is a problem that the position of the airbag relative to the occupant moves due to steering by the occupant, and the deployment direction of the airbag lacks stability. In addition, the location of the airbag and the inflator is limited to the steering system, so the degree of layout freedom is low.
　本発明は、オートバイの車体フレームを有効に利用して、小型化及び軽量化を図ることができるとともに、レイアウトの自由度についても確保することができるオートバイ用エアバッグ装置を提供することを目的とする。 SUMMARY OF THE INVENTION It is an object of the present invention to provide an airbag device for a motorcycle, which can be made compact and lightweight by effectively utilizing the body frame of the motorcycle, and which can ensure a degree of freedom in layout. do.
　本発明の一態様に係るオートバイ用エアバッグ装置は、メインパイプを有する車体フレームを備えたオートバイに搭載されるエアバッグ装置において、エアバッグと、エアバッグに膨張展開用のガスを供給するインフレータと、を備え、インフレータは、メインパイプの内部に設けられ、エアバッグは、メインパイプの外部に設けられ、インフレータからの膨張展開用のガスが、ガス流路パイプを介してエアバッグに供給されるように構成されたものである。 A motorcycle airbag device according to one aspect of the present invention is an airbag device mounted on a motorcycle having a vehicle body frame having a main pipe, comprising an airbag and an inflator that supplies gas for inflation and deployment of the airbag. , the inflator is provided inside the main pipe, the airbag is provided outside the main pipe, and gas for inflation and deployment from the inflator is supplied to the airbag through the gas flow pipe. It is configured as follows.
　この態様によれば、高い剛性が求められる車体フレームの一部であるメインパイプの内部にインフレータが設けられるため、メインパイプにおいて、エアバッグ展開初期に生じるインフレータからの衝撃を受け止める耐圧強度を確保することができる。これにより、従来のリテーナに求められていた強度設計が不要となる。したがって、仮に従来のようなリテーナを設ける場合であっても（例えば、後述の実施形態では、ハウジングを設けている。）、その設計、構造を単純化することができ、エアバッグ装置全体としての小型化及び軽量化を図ることができる。 According to this aspect, since the inflator is provided inside the main pipe, which is a part of the vehicle body frame that requires high rigidity, the main pipe has sufficient pressure resistance to receive the impact from the inflator that occurs at the initial stage of deployment of the airbag. be able to. This eliminates the need for the strength design required for conventional retainers. Therefore, even if a conventional retainer is provided (for example, in the embodiments described later, a housing is provided), the design and structure can be simplified, and the airbag device as a whole can be improved. Miniaturization and weight reduction can be achieved.
　また、インフレータがメインパイプの内部に設けられる一方、エアバッグはメインパイプの外部に設けられるため、両者を分けて個々に配置することができる。したがって、インフレータ及びエアバッグの両者の配置に関して、レイアウトの自由度を高めることができる。また、両者の配置がオートバイの操舵系の位置ではなく、メインパイプ側の位置となるため、エアバッグの展開方向の安定性の確保にも寄与することができる。 Also, while the inflator is provided inside the main pipe, the airbag is provided outside the main pipe, so both can be separately arranged. Therefore, it is possible to increase the degree of freedom in layout regarding the placement of both the inflator and the airbag. In addition, since both are positioned on the side of the main pipe rather than on the steering system of the motorcycle, it is possible to contribute to ensuring stability in the deployment direction of the airbag.
　なお本発明は、次のようなフレームのあるタイプのオートバイであれば適用可能である。例えば、スクーター、アドベンチャー、ツアラー、スポーツツアラー、スクラブラー、クラシック（レトロ）、アメリカン（クルーザー）、ネイキッド、ストリートファイター、オフロード・スーパーモタード、スーパースポーツ、ストリート、ミニバイク、三輪車トライク、四輪車バギー等が含まれ、更には、海、湖、川等の水面を移動する水上バイクや、雪上を移動するスノーモービル、オートバイの横に連結されたサイドカー等にも適用可能である。 It should be noted that the present invention can be applied to any type of motorcycle having the following frames. Scooter, Adventure, Tourer, Sports Tourer, Scrabbler, Classic (retro), American (cruiser), Naked, Streetfighter, Off-road Supermotard, Supersport, Street, Minibike, Tricycle Trike, Four-wheel Buggy etc., and can also be applied to personal watercraft that move on the surface of water such as seas, lakes, rivers, etc., snowmobiles that move on snow, sidecars that are connected to the sides of motorcycles, and the like.
実施形態に係るエアバッグ装置が搭載されるオートバイの外観を示す斜視図である。1 is a perspective view showing the appearance of a motorcycle equipped with an airbag device according to an embodiment; FIG. 図１のオートバイについて、シートなどの一部の搭載部品を取り外した状態を示す斜視図である。FIG. 2 is a perspective view showing the motorcycle of FIG. 1 with some mounted parts such as a seat removed. 図１のオートバイの車体フレームを示す斜視図である。FIG. 2 is a perspective view showing a body frame of the motorcycle of FIG. 1; 実施形態に係るエアバッグ装置を車体フレームのメインパイプとともに示す、車体フレームの前方側の拡大側面図である。1 is an enlarged side view of the front side of a vehicle body frame showing an airbag device according to an embodiment together with a main pipe of the vehicle body frame; FIG. 図４のＡ部を模式的に示す拡大側面断面図である。FIG. 5 is an enlarged side cross-sectional view schematically showing part A of FIG. 4 ; 図１のオートバイについて、エアバッグが膨張展開した状態を示す斜視図である。FIG. 2 is a perspective view showing a state in which an airbag is inflated and deployed for the motorcycle of FIG. 1; 実施形態の変形例に係るエアバッグ装置を車体フレームのメインパイプとともに示す、車体フレームの前方側の拡大側面図である。FIG. 11 is an enlarged side view of the front side of the vehicle body frame showing an airbag device according to a modification of the embodiment together with a main pipe of the vehicle body frame; 図７のＢ部を模式的に示す拡大側面断面図である。FIG. 8 is an enlarged side cross-sectional view schematically showing a B portion of FIG. 7; オートバイの車体フレームに対するエアバッグ装置のインフレータの配置例を示す図である。FIG. 2 is a diagram showing an example of arrangement of an inflator of an airbag device with respect to a vehicle body frame of a motorcycle; オートバイの車体フレームに対するエアバッグ装置のインフレータの別の配置例を示す図である。FIG. 4 is a diagram showing another arrangement example of the inflator of the airbag device with respect to the body frame of the motorcycle;
　本発明の好適な実施形態に係るオートバイ用エアバッグ装置について説明する。本書において、上下、左右及び前後を以下のとおり定義する。乗員が正規の姿勢でシートに着座した際に、乗員が向いている方向を前方、その反対方向を後方と称する。また、乗員が正規の姿勢でシートに着座した際に、乗員の右側を右方向、乗員の左側を左方向と称する。同様に、乗員が正規の姿勢で着座した際に、乗員の頭部方向を上方、乗員の腰部方向を下方と称し座標の軸を示すときは上下方向とする。 A motorcycle airbag device according to a preferred embodiment of the present invention will be described. In this document, top and bottom, left and right, and front and back are defined as follows. When the occupant is seated on the seat in a normal posture, the direction in which the occupant is facing is called the front, and the opposite direction is called the rear. Also, when the occupant is seated on the seat in a normal posture, the right side of the occupant is referred to as the right direction, and the left side of the occupant is referred to as the left direction. Similarly, when the occupant is seated in a normal posture, the direction of the occupant's head is referred to as the upward direction, and the direction of the occupant's waist as the downward direction.
　図１及び２に示すように、オートバイ１は、その骨格を形成する車体フレーム２と、乗員が跨るようにして着座するシート３と、乗員によって操舵される操舵系４と、を有している。シート３は車体フレーム２の後部上側に設けられ、操舵系４は車体フレーム２の前端に操舵可能に支持されている。操舵系４は、フロントフォーク５の下端部に前輪を支持し、フロントフォーク５の上端部にハンドル６を有している。シート３と操舵系４との間には、エアバッグ装置１０が搭載されている。 As shown in FIGS. 1 and 2, a motorcycle 1 has a body frame 2 forming its skeleton, a seat 3 on which an occupant straddles, and a steering system 4 steered by the occupant. . A seat 3 is provided on the rear upper side of the vehicle body frame 2, and a steering system 4 is supported at the front end of the vehicle body frame 2 so as to be steerable. The steering system 4 supports a front wheel on the lower end of the front fork 5 and has a handle 6 on the upper end of the front fork 5 . An airbag device 10 is mounted between the seat 3 and the steering system 4 .
　車体フレーム２を含む車体は、各種のカバーで部分的に覆われており、このカバーの一つには、エアバッグ装置１０のモジュールカバー１１も含まれている。モジュールカバー１１の前方にメーター系１２が配置され、モジュールカバー１１の後方に燃料タンク１３が配置され、燃料タンク１３の後方にシート３が配置されている。そして、燃料タンク１３の下側にエンジン１４が搭載されている。 The vehicle body including the vehicle body frame 2 is partially covered with various covers, one of which includes the module cover 11 of the airbag device 10 . A meter system 12 is arranged in front of the module cover 11 , a fuel tank 13 is arranged behind the module cover 11 , and a seat 3 is arranged behind the fuel tank 13 . An engine 14 is mounted below the fuel tank 13 .
　図２及び３に示すように、車体フレーム２は、メインパイプ２１、２１を有している。メインパイプ２１、２１は、オートバイ１のメインフレームを構成しており、オートバイ１の各種主要部品を支持する。例えば、メインパイプ２１、２１は、燃料タンク１３及びエンジン１４を支持する。ここでは、メインパイプ２１、２１は、左右に一対が設けられており、エンジン１４の四隅を囲うように延在している。 As shown in FIGS. 2 and 3, the body frame 2 has main pipes 21, 21. As shown in FIGS. The main pipes 21 , 21 form a main frame of the motorcycle 1 and support various main parts of the motorcycle 1 . For example, main pipes 21 , 21 support fuel tank 13 and engine 14 . Here, a pair of main pipes 21 , 21 are provided on the left and right and extend so as to surround the four corners of the engine 14 .
　メインパイプ２１は、エンジン１４や路面からの振動、衝撃に耐える強度のほか、曲げや捻じれなどに対する剛性を有している。メインパイプ２１は、例えば、スチールやアルミ合金などの金属により形成されている。また、メインパイプ２１は、パイプ状部分で構成されている。 The main pipe 21 has strength to withstand vibrations and impacts from the engine 14 and the road surface, as well as rigidity against bending and twisting. The main pipe 21 is made of metal such as steel or aluminum alloy, for example. Further, the main pipe 21 is composed of a pipe-shaped portion.
　また、車体フレーム２は、ヘッドパイプ２２、左右一対のピボットフレーム２３、２３及び左右一対のシートフレーム２４、２４を有している。ヘッドパイプ２２とピボットフレーム２３、２３とがメインパイプ２１、２１によってつながれ、シートフレーム２４、２４がピボットフレーム２３、２３の上部から後方に延びている。ヘッドパイプ２２は、車体フレーム２の前端部で車幅の中央に設けられ、操舵系４のフロントフォーク５を回動可能に軸支する。シートフレーム２４、２４上には、シート３が設けられる。 The body frame 2 also has a head pipe 22, a pair of left and right pivot frames 23, 23, and a pair of left and right seat frames 24, 24. A head pipe 22 and pivot frames 23, 23 are connected by main pipes 21, 21, and seat frames 24, 24 extend rearward from upper portions of the pivot frames 23, 23. The head pipe 22 is provided in the center of the vehicle width at the front end of the vehicle body frame 2 and rotatably supports the front fork 5 of the steering system 4 . A seat 3 is provided on the seat frames 24 , 24 .
　メインパイプ２１、２１は、例えば、トップチューブ２１ａ、２１ａ及びダウンチューブ２１ｂ、２１ｂを有している。トップチューブ２１ａ、２１ａは、タンクレールを構成しており、燃料タンク１３を支持する。トップチューブ２１ａ、２１ａとダウンチューブ２１ｂ、２１ｂとの間で、ピボットフレーム２３、２３の前方にエンジン１４が搭載される。 The main pipes 21, 21 have, for example, top tubes 21a, 21a and down tubes 21b, 21b. The top tubes 21 a , 21 a constitute tank rails and support the fuel tank 13 . The engine 14 is mounted in front of the pivot frames 23, 23 between the top tubes 21a, 21a and the down tubes 21b, 21b.
　上述した車体フレーム２は、オートバイ１のフレーム構造（クレードル系のフレーム）の一例であるが、エアバッグ装置１０の後述するインフレータ３２（図４参照）を収納するためのパイプ状部分を有する限り（すなわちメインパイプ２１を有する限り）、各種のフレーム構造を用いることができる。列挙すると、シングルクレードルフレーム、ダブルクレードルフレーム、セミダブルクレードルフレーム、ダイヤモンドフレーム、バックボーンフレーム、トラスフレーム、ツインスパーフレームなどのフレーム構造を用いることができる。 The vehicle body frame 2 described above is an example of the frame structure (cradle-type frame) of the motorcycle 1, but as long as it has a pipe-shaped portion for accommodating an inflator 32 (see FIG. 4) described later of the airbag device 10 ( That is, as long as it has the main pipe 21), various frame structures can be used. Frame constructions such as single cradle frame, double cradle frame, semi-double cradle frame, diamond frame, backbone frame, truss frame, twin spar frame can be used, to name a few.
　次に、図４を参照して、エアバッグ装置１０について説明する。
　エアバッグ装置１０は、エアバッグ３１と、エアバッグ３１に膨張展開用のガスを供給するインフレータ３２と、を有している。また、エアバッグ装置１０は、エアバッグ３１を収納するハウジング３３を有している。ハウジング３３の一部（上部）には、エアバッグ３１を覆うように上述のモジュールカバー１１が取り付けられている。モジュールカバー１１は、例えば樹脂により形成されている。 Next, the airbag device 10 will be described with reference to FIG.
The airbag device 10 has an airbag 31 and an inflator 32 that supplies gas for inflation and deployment to the airbag 31 . The airbag device 10 also has a housing 33 that accommodates the airbag 31 . The module cover 11 described above is attached to a portion (upper portion) of the housing 33 so as to cover the airbag 31 . The module cover 11 is made of resin, for example.
　エアバッグ装置１０においては、少なくともエアバッグ３１及びハウジング３３がモジュール化（ユニット化）されてエアバッグモジュール３４を構成し、インフレータ３２がエアバッグモジュール３４とは独立した構成となっている。本実施形態では、エアバッグモジュール３４は、モジュールカバー１１も含めてモジュール化されている。 In the airbag device 10 , at least the airbag 31 and the housing 33 are modularized (unitized) to form an airbag module 34 , and the inflator 32 is independent from the airbag module 34 . In this embodiment, the airbag module 34 is modularized including the module cover 11 .
　エアバッグ３１は、袋体であり、インフレータ３２からのガスの供給を受けて、膨張展開する。エアバッグ３１は、例えば不織布等からなる複数枚の基布を適宜の位置で接合（例えば縫合又は接着）することによって形成される。エアバッグ３１は、例えば折り畳まれた状態でハウジング３３に収納される。 The airbag 31 is a bag body, and is inflated and deployed upon receiving gas supplied from the inflator 32 . The airbag 31 is formed by joining (for example, sewing or adhering) a plurality of base fabrics made of, for example, nonwoven fabrics at appropriate positions. The airbag 31 is stored in the housing 33 in a folded state, for example.
　インフレータ３２は、制御装置（図示省略）と電気的に接続されており、オートバイ１の衝突時に作動する。例えば、オートバイ１の衝突時にその衝撃が衝撃センサによって検知され、衝撃センサが検知した信号が制御装置に送られる。制御装置が、エアバッグ装置１０の作動が必要であると判断すると、インフレータ３２に点火電流を送る。これによって、インフレータ３２が作動すると、インフレータ３２が瞬時にガスを発生する。本実施形態では、この発生した膨張展開用のガスが、インフレータ３２からガス流路パイプ４０を介してエアバッグ３１に供給されるようになっている。 The inflator 32 is electrically connected to a control device (not shown) and operates when the motorcycle 1 collides. For example, when the motorcycle 1 collides, the impact is detected by an impact sensor, and a signal detected by the impact sensor is sent to the control device. When the controller determines that the airbag system 10 needs to be activated, it sends an ignition current to the inflator 32 . As a result, when the inflator 32 is activated, the inflator 32 instantly generates gas. In this embodiment, the generated inflation and deployment gas is supplied from the inflator 32 to the airbag 31 through the gas flow path pipe 40 .
　インフレータ３２としては、ガス発生剤、圧縮ガス又はこれらの両方が充填されたものなど、各種のものを利用することができる。すなわち、インフレータ３２は、火薬の燃焼によりガスを発生するパイロ型であってもよいし、火薬と圧縮ガスとを組み合わせたハイブリッド型であってもよい。ただし、メインパイプ２１内へのインフレータ３２の搭載性及びエアバッグ３１への熱的負荷の抑制の観点からは、ハイブリッド型が好ましい。 Various inflators can be used as the inflator 32, such as those filled with a gas generating agent, compressed gas, or both. That is, the inflator 32 may be of a pyrotype that generates gas by combustion of explosives, or of a hybrid type that combines explosives and compressed gas. However, the hybrid type is preferable from the viewpoints of mountability of the inflator 32 in the main pipe 21 and suppression of thermal load on the airbag 31 .
　ハイブリッド型の一例を挙げると、インフレータ３２は、有底の円筒体５１内が仕切りを介して火薬装填室及び圧縮ガス充填室に区画される。インフレータ３２は、圧縮ガス充填室の火薬装填室と反対側に、封板を介してガス放出部５２を有する。インフレータ３２に点火電流が送られると、火薬装填室内の火薬が着火し、その発生熱により火薬装填室内のガス発生剤が着火する。その結果、火薬装填室内の圧力が上昇し、仕切りが破れ、圧縮ガス充填室の圧縮ガスが火薬装填室からの熱によって温められる。そして、圧縮ガス充填室内の圧力上昇により封板が破れ、圧縮ガスがガス放出部５２の複数の噴出孔から放出され、ガス流路パイプ４０を介してエアバッグ３１に供給される。 As an example of the hybrid type, the inflator 32 is divided into an explosive charging chamber and a compressed gas charging chamber via a partition in the bottomed cylindrical body 51 . The inflator 32 has a gas release portion 52 via a sealing plate on the opposite side of the compressed gas charging chamber from the explosive charging chamber. When an ignition current is sent to the inflator 32, the explosive in the explosive loading chamber is ignited, and the generated heat ignites the gas generating agent in the explosive loading chamber. As a result, the pressure in the explosive charge chamber rises, the partition breaks, and the compressed gas in the compressed gas charge chamber is warmed by the heat from the explosive charge chamber. Then, the sealing plate is broken due to the pressure rise in the compressed gas charging chamber, and the compressed gas is discharged from the plurality of ejection holes of the gas discharge portion 52 and supplied to the airbag 31 through the gas flow pipe 40 .
　エアバッグ装置１０は、車体フレーム２の構成要素のうち、メインパイプ２１に関連付けて設けられる。具体的には、エアバッグ３１はメインパイプ２１の外部に設けられ、インフレータ３２はメインパイプ２１の内部に設けられる。 The airbag device 10 is provided in association with the main pipe 21 among the constituent elements of the vehicle body frame 2 . Specifically, the airbag 31 is provided outside the main pipe 21 and the inflator 32 is provided inside the main pipe 21 .
　図４に示す例では、インフレータ３２は、メインパイプ２１のダウンチューブ２１ｂの内部に設けられている。ダウンチューブ２１ｂは、例えば、ヘッドパイプ２２の下部から後方へ延びるパイプ状部分として形成される。ダウンチューブ２１ｂの上方にはトップチューブ２１ａがあり、トップチューブ２１ａがヘッドパイプ２２の上部から後方へと延びるパイプ状部分として形成される。なお、図４に示すフレーム構造は図３に示すフレーム構造とは一部相違する。 In the example shown in FIG. 4, the inflator 32 is provided inside the down tube 21b of the main pipe 21. The down tube 21b is formed, for example, as a pipe-shaped portion extending rearward from the lower portion of the head pipe 22. As shown in FIG. There is a top tube 21a above the down tube 21b, and the top tube 21a is formed as a pipe-shaped portion extending rearward from the upper portion of the head pipe 22. As shown in FIG. Note that the frame structure shown in FIG. 4 is partially different from the frame structure shown in FIG.
　一方、エアバッグ３１を含むエアバッグモジュール３４は、メインパイプ２１の外部において、メインパイプ２１の外面に取り付けられる。例えば、エアバッグモジュール３４のハウジング３３が、トップチューブ２１ａの外面に取り付けられる。ハウジング３３は、例えば、全体として浅皿状に形成され、この浅皿状の底壁３３ａにエアバッグ３１を固定する。そして、ハウジング３３の上部が、モジュールカバー１１で覆われる。ハウジング３３は、例えば、トップチューブ２１ａにボルトなどにより固定される締結点３５、３５を有している。 On the other hand, the airbag module 34 including the airbag 31 is attached to the outer surface of the main pipe 21 outside the main pipe 21 . For example, the housing 33 of the airbag module 34 is attached to the outer surface of the top tube 21a. The housing 33 is formed, for example, in the shape of a shallow plate as a whole, and the airbag 31 is fixed to the shallow plate-like bottom wall 33a. Then, the upper portion of the housing 33 is covered with the module cover 11 . The housing 33 has, for example, fastening points 35, 35 fixed to the top tube 21a by bolts or the like.
　図５は、ガス流路パイプ４０周りの構成を拡大して示している。
　エアバッグ３１はガス導入口３１ａを有し、メインパイプ２１はガス導出口２１ｃを有している。ガス導入口３１ａとガス導出口２１ｃとの間は、ガス流路パイプ４０によってつながれている。 FIG. 5 shows an enlarged view of the configuration around the gas flow pipe 40. As shown in FIG.
The airbag 31 has a gas inlet 31a, and the main pipe 21 has a gas outlet 21c. A gas flow pipe 40 connects the gas inlet 31a and the gas outlet 21c.
　例えば、ガス導入口３１ａは、エアバッグ３１の下面に形成された開口であり、ガス導入口３１ａを介してインフレータ３２からの膨張展開用のガスがエアバッグ３１の内部に導入される。また、ガス導出口２１ｃは、ダウンチューブ２１ｂの上面に形成された開口であり、ガス導出口２１ｃを介してインフレータ３２からの膨張展開用のガスがダウンチューブ２１ｂの外部に導出される。ガス導入口３１ａ及びガス導出口２１ｃの各開口径は、ガス流路パイプ４０の配管径と同程度に形成されている。 For example, the gas introduction port 31a is an opening formed in the lower surface of the airbag 31, and gas for inflation and deployment from the inflator 32 is introduced into the airbag 31 through the gas introduction port 31a. The gas outlet 21c is an opening formed in the upper surface of the down tube 21b, and the gas for inflation and deployment from the inflator 32 is led out of the down tube 21b through the gas outlet 21c. Each opening diameter of the gas introduction port 31 a and the gas outlet port 21 c is formed to be approximately the same as the pipe diameter of the gas flow path pipe 40 .
　ガス放出部５２は、ガス導出口２１ｃの近傍に位置している。また、ガス導入口３１ａ及びガス導出口２１ｃは、ガス流路パイプ４０の軸線上に位置している。そして、この軸線上には、ガス放出部５２も位置している。すなわち、ガス導入口３１ａ、ガス導出口２１ｃ及びガス放出部５２は、ほぼ同じライン上に位置している。このような配置により、ガス放出部５２からのガスをガス導入口３１ａに迅速に導入可能となっている。 The gas discharge part 52 is located near the gas outlet 21c. Also, the gas inlet 31 a and the gas outlet 21 c are positioned on the axis of the gas flow pipe 40 . A gas discharge portion 52 is also located on this axis. That is, the gas inlet 31a, the gas outlet 21c, and the gas discharge portion 52 are positioned on substantially the same line. Such an arrangement allows the gas from the gas discharge portion 52 to be quickly introduced into the gas introduction port 31a.
　ガス流路パイプ４０は、例えば金属により形成されている。ガス流路パイプ４０は、メインパイプ２１のトップチューブ２１ａとダウンチューブ２１ｂとの間に位置する。ガス流路パイプ４０は、ガス導入口３１ａとガス導出口２１ｃとの間をつなぐように、ハウジング３３及びメインパイプ２１に接続される。ガス流路パイプ４０は、上下の両端を開口した円筒状部材であり、上下方向に延在している。 The gas flow pipe 40 is made of metal, for example. The gas flow pipe 40 is positioned between the top tube 21 a and the down tube 21 b of the main pipe 21 . The gas flow pipe 40 is connected to the housing 33 and the main pipe 21 so as to connect the gas inlet 31a and the gas outlet 21c. The gas flow pipe 40 is a cylindrical member with both upper and lower ends opened, and extends in the vertical direction.
　ガス流路パイプ４０の上端４０ａは、フランジ状に形成されており、締結手段６０を介してハウジング３３に固定される。具体的には、ガス流路パイプ４０の上端４０ａは、ボルト６１及びナット６２を含む締結手段６０を介して、ハウジング３３の底壁３３ａに固定される。ここでは、締結手段６０は、エアバッグ３１を底壁３３ａに固定するのにも用いられている。 An upper end 40 a of the gas flow pipe 40 is formed into a flange shape and fixed to the housing 33 via fastening means 60 . Specifically, the upper end 40 a of the gas flow pipe 40 is fixed to the bottom wall 33 a of the housing 33 via fastening means 60 including bolts 61 and nuts 62 . Here, the fastening means 60 are also used to fix the airbag 31 to the bottom wall 33a.
　ガス流路パイプ４０の下端４０ｂは、フランジ状に形成されており、メインパイプ２１に溶接される。具体的には、ガス流路パイプ４０の下端４０ｂは、ガス導出口２１ｃの周辺近傍でダウンチューブ２１ｂの上面に溶接される。 A lower end 40 b of the gas flow pipe 40 is formed into a flange shape and welded to the main pipe 21 . Specifically, the lower end 40b of the gas flow pipe 40 is welded to the upper surface of the down tube 21b in the vicinity of the gas outlet 21c.
　ガス流路パイプ４０は、インフレータ３２を挿通可能なサイズに形成されている。したがって、ガス流路パイプ４０の配管径は、インフレータ３２の円筒体５１の外径よりも大きくなっている。このようサイズ関係とすることで、インフレータ３２を、ガス流路パイプ４０の上端４０ａ側からガス流路パイプ４０の内部に挿入し、続いて、ガス流路パイプ４０の下端４０ｂから排出して、ダウンチューブ２１ｂの内部に設けることができる。 The gas flow pipe 40 is sized so that the inflator 32 can be inserted through it. Therefore, the pipe diameter of the gas flow pipe 40 is larger than the outer diameter of the cylindrical body 51 of the inflator 32 . With this size relationship, the inflator 32 is inserted into the gas flow pipe 40 from the upper end 40a side of the gas flow pipe 40, and then discharged from the lower end 40b of the gas flow pipe 40. It can be provided inside the down tube 21b.
　ここで、図４及び５に示すように、メインパイプ２１（ここではダウンチューブ２１ｂ）の内部には、インフレータ３２を収納する収納空間７０があり、収納空間７０は、ガス導出口２１ｃを除いて、ダウンチューブ２１ｂにおける閉じた空間となっている。収納空間７０は、ガス流路パイプ４０内の空間と連通すると共に、エアバッグ３１内の空間と連通している。これら３つの空間は、全体として気密に閉じている。したがって、インフレータ３２からのガスは、外部に逃げることなく、エアバッグ３１に供給される。 Here, as shown in FIGS. 4 and 5, inside the main pipe 21 (here, the down tube 21b), there is a storage space 70 for storing the inflator 32, and the storage space 70 includes the gas outlet port 21c. , a closed space in the down tube 21b. The storage space 70 communicates with the space inside the gas flow pipe 40 and also communicates with the space inside the airbag 31 . These three spaces are hermetically closed as a whole. Therefore, the gas from the inflator 32 is supplied to the airbag 31 without escaping to the outside.
　収納空間７０は、例えば、ダウンチューブ２１ｂの長手方向にわたって形成された空間であってもよい。この場合、ダウンチューブ２１ｂの長手方向の両端が閉塞している。別の例では、収納空間７０は、ダウンチューブ２１ｂの長手方向における一部の空間であってもよい。この場合、ダウンチューブ２１ｂの長手方向の両端の間に、閉じた空間とするための隔壁やシール部材が設けられる。一例を挙げると、インフレータ３２の外面とメインパイプ２１（ダウンチューブ２１ｂ）の内面との間にシール部材７１を介在させてもよい。このようなシール部材７１によって、収納空間７０の少なくとも一部が構成されることになる。シール部材７１は、例えばＯリングで構成することができる。 The storage space 70 may be, for example, a space formed along the longitudinal direction of the down tube 21b. In this case, both longitudinal ends of the down tube 21b are closed. In another example, the storage space 70 may be a partial space in the longitudinal direction of the down tube 21b. In this case, a partition wall or a sealing member is provided between both ends of the down tube 21b in the longitudinal direction to form a closed space. For example, a seal member 71 may be interposed between the outer surface of the inflator 32 and the inner surface of the main pipe 21 (down tube 21b). At least part of the storage space 70 is configured by such a sealing member 71 . The sealing member 71 can be composed of, for example, an O-ring.
　インフレータ３２は、収納空間７０外に露出することなく、収納空間７０に収納される。すなわち、円筒体５１及びガス放出部５２を含むインフレータ３２の全構成部分が、収納空間７０に収納される。収納空間７０において、インフレータ３２は、メインパイプ２１（ダウンチューブ２１ｂ）に固定される。例えば、ねじなどにより固定される。あるいは、別途設けたアタッチメントをかしめることにより固定される。 The inflator 32 is stored in the storage space 70 without being exposed to the outside of the storage space 70. That is, all constituent parts of the inflator 32 including the cylindrical body 51 and the gas discharge portion 52 are housed in the housing space 70 . In the storage space 70, the inflator 32 is fixed to the main pipe 21 (down tube 21b). For example, it is fixed with a screw or the like. Alternatively, it is fixed by crimping a separately provided attachment.
　オートバイ１の衝突時にインフレータ３２が作動すると、インフレータ３２のガス放出部５２から膨張展開用のガスが放出され、ガス流路パイプ４０内へと流れ込み、続いてエアバッグ３１内へと流れ込む。ガスの供給を受けたエアバッグ３１は、急速に膨張してモジュールカバー１１を破裂させて、乗員の前面に向かって膨張展開する（参照：図６）。 When the inflator 32 is activated at the time of a collision of the motorcycle 1, gas for inflation and deployment is released from the gas release portion 52 of the inflator 32, flows into the gas flow path pipe 40, and then into the airbag 31. The airbag 31 supplied with gas rapidly inflates, ruptures the module cover 11, and inflates and deploys toward the front of the occupant (see FIG. 6).
　図７及び８は、実施形態の変形例に係るエアバッグ装置１００を示している。上述のエアバッグ装置１０とは異なり、エアバッグ装置１００では、インフレータ３２が、メインパイプ２１の中間フレームパイプ２１ｅの内部に設けられている。中間フレームパイプ２１ｅは、トップチューブ２１ａとダウンチューブ２１ｂとをつないでいる。中間フレームパイプ２１ｅは、上記のダウンチューブ２１ｂのガス導出口２１ｃ及び収納空間７０と同様に、ガス導出口１２１ｃ及び収納空間１７０を有している。例えば、ガス導出口１２１ｃは、中間フレームパイプ２１ｅの前面に形成され、収納空間１７０は、ガス導出口１２１ｃを除いて、中間フレームパイプ２１ｅにおける閉じた空間となる。 7 and 8 show an airbag device 100 according to a modification of the embodiment. Unlike the airbag device 10 described above, in the airbag device 100 , the inflator 32 is provided inside the intermediate frame pipe 21 e of the main pipe 21 . The intermediate frame pipe 21e connects the top tube 21a and the down tube 21b. The intermediate frame pipe 21e has a gas outlet 121c and a storage space 170, like the gas outlet 21c and the storage space 70 of the down tube 21b. For example, the gas outlet 121c is formed in the front surface of the intermediate frame pipe 21e, and the storage space 170 is a closed space in the intermediate frame pipe 21e except for the gas outlet 121c.
　また、エアバッグ装置１００では、エアバッグモジュール３４が、ガス流路パイプ１４０も含めてモジュール化している。ガス流路パイプ１４０は、例えば金属の曲げ加工により形成された、両端を開口した円筒状部材であり、略J字状に延在している。ガス流路パイプ１４０は、エアバッグ３１のガス導入口３１ａと中間フレームパイプ２１ｅのガス導出口１２１ｃとの間をつなぐように、ハウジング３３及び中間フレームパイプ２１ｅに接続される。 In addition, in the airbag device 100, the airbag module 34 including the gas flow path pipe 140 is modularized. The gas flow pipe 140 is a cylindrical member with both ends opened, which is formed by bending metal, for example, and extends in a substantially J-shape. The gas passage pipe 140 is connected to the housing 33 and the intermediate frame pipe 21e so as to connect the gas inlet 31a of the airbag 31 and the gas outlet 121c of the intermediate frame pipe 21e.
　例えば、ガス流路パイプ１４０の一端１４０ａは、フランジ状に形成されており、ハウジング３３に溶接される。具体的には、一端１４０ａは、ハウジング３３の底壁３３ａに溶接される。この溶接個所の周辺近傍において、ハウジング３３の底壁３３ａには、上記の締結手段６０（ボルト６１及びナット６２）によってエアバッグ３１が固定される。ガス流路パイプ１４０の他端１４０ｂは、フランジ状に形成されており、ボルト１６１（締結手段）を介して中間フレームパイプ２１ｅに固定される。具体的には、他端１４０ｂは、ボルト１６１を介して、ガス導出口１２１ｃの周辺近傍で中間フレームパイプ２１ｅの前面に固定される。 For example, one end 140 a of the gas flow pipe 140 is formed into a flange shape and welded to the housing 33 . Specifically, one end 140 a is welded to the bottom wall 33 a of the housing 33 . The airbag 31 is fixed to the bottom wall 33a of the housing 33 in the vicinity of the welded portion by the fastening means 60 (bolts 61 and nuts 62). The other end 140b of the gas flow pipe 140 is formed in a flange shape and fixed to the intermediate frame pipe 21e via bolts 161 (fastening means). Specifically, the other end 140b is fixed via a bolt 161 to the front surface of the intermediate frame pipe 21e in the vicinity of the gas outlet 121c.
　ガス流路パイプ１４０は、ガス流路パイプ４０とは異なり、インフレータ３２を挿通可能なサイズに形成される必要はない。ここでは、インフレータ３２は、メインパイプ２１に形成された挿入穴２００からメインパイプ２１の内部へと挿入される。例えば、挿入穴２００は、トップチューブ２１ａの上面に形成され、インフレータ３２は、挿入穴２００からトップチューブ２１ａを介して中間フレームパイプ２１ｅに挿入され、収納空間１７０に配置される。挿入穴２００は、オートバイ１における搭載部品、例えば燃料タンク１３によって覆われる。他の実施態様では、メーター系１２によって挿入穴２００を覆うようにしてもよい。このように、オートバイ１における既存の搭載部品を有効に用いて挿入穴２００を隠すことができ、インフレータ３２に水が直接かからない構造とすることができる。 Unlike the gas flow pipe 40, the gas flow pipe 140 does not have to be formed in a size that allows the inflator 32 to pass through. Here, the inflator 32 is inserted into the main pipe 21 through an insertion hole 200 formed in the main pipe 21 . For example, the insertion hole 200 is formed in the upper surface of the top tube 21 a , and the inflator 32 is inserted through the insertion hole 200 through the top tube 21 a into the intermediate frame pipe 21 e and arranged in the storage space 170 . The insertion hole 200 is covered by a mounted component on the motorcycle 1, such as the fuel tank 13. As shown in FIG. In other embodiments, meter system 12 may cover insertion hole 200 . In this way, the existing mounting parts of the motorcycle 1 can be effectively used to hide the insertion hole 200, and a structure can be provided in which the inflator 32 is not directly exposed to water.
　別の変形例としては、インフレータ３２の配置は、メインパイプ２１のトップチューブ２１ａの内部に設けることも可能である。例えば、図７において破線で示すように、燃料タンク１３の下側において、インフレータ３２´をトップチューブ２１ａの内部に設けてもよい。 As another modification, the inflator 32 can be arranged inside the top tube 21 a of the main pipe 21 . For example, below the fuel tank 13, an inflator 32' may be provided inside the top tube 21a, as indicated by the dashed line in FIG.
　いくつかの変形態様においては、インフレータ３２を複数本とし、メインパイプ２１内の複数箇所に設けてもよい。例えば、図４に示した例では、左右一対のダウンチューブ２１ｂ、２１ｂのそれぞれにインフレータ３２を配置してもよい。また、図７に示した例では、中間フレームパイプ２１ｅとトップチューブ２１ａとのそれぞれにインフレータ３２、３２´を配置してもよい。さらに、図９に示す例のように、セミダブルクレードルフレームにおけるトップチューブ２１ａとダウンチューブ２１ｂとのそれぞれにインフレータ３２を配置してもよい。また、図１０に示す例のように、ダブルクレードルフレームにおける左右一対のトップチューブ２１ａ、２１ａと左右一対のダウンチューブ２１ｂ、２１ｂとのそれぞれにインフレータ３２を配置してもよい。 In some modifications, a plurality of inflators 32 may be provided at a plurality of locations within the main pipe 21 . For example, in the example shown in FIG. 4, the inflator 32 may be arranged in each of the pair of left and right down tubes 21b, 21b. In the example shown in FIG. 7, the inflators 32, 32' may be arranged on the intermediate frame pipe 21e and the top tube 21a, respectively. Furthermore, as in the example shown in FIG. 9, the inflator 32 may be arranged on each of the top tube 21a and the down tube 21b in the semi-double cradle frame. Further, as in the example shown in FIG. 10, the inflators 32 may be arranged in the pair of left and right top tubes 21a, 21a and the pair of left and right down tubes 21b, 21b in the double cradle frame.
　なお、詳述しないが、インフレータ３２を複数本とする場合、各インフレータ３２に対応してガス流路パイプ４０（１４０）を設け、各インフレータ３２からの膨張展開用ガスが、対応する各ガス流路パイプ４０を介してエアバッグ３１に供給されるようにするとよい。 Although not described in detail, when a plurality of inflators 32 are used, a gas flow path pipe 40 (140) is provided corresponding to each inflator 32, and the inflation/deployment gas from each inflator 32 flows into each corresponding gas flow. It is preferable to supply the airbag 31 via the conduit pipe 40 .
　以上説明した本実施形態の作用効果を説明する。
　上述のとおり、実施形態に係るエアバッグ装置１０、１００は、メインパイプ２１を有する車体フレーム２を備えたオートバイ１に搭載されるものであり、メインパイプ２１の外部に設けられるエアバッグ３１と、メインパイプ２１の内部に設けられるインフレータ３２と、を備える。そして、インフレータ３２からの膨張展開用ガスが、ガス流路パイプ４０、１４０を介してエアバッグ３１に供給されるように構成されている。 The effects of the present embodiment described above will be described.
As described above, the airbag devices 10 and 100 according to the embodiments are mounted on the motorcycle 1 having the vehicle body frame 2 having the main pipe 21. The airbag 31 provided outside the main pipe 21, and an inflator 32 provided inside the main pipe 21 . Inflation/deployment gas from the inflator 32 is supplied to the airbag 31 through the gas flow pipes 40 and 140 .
　この態様によれば、高い剛性が求められる車体フレーム２の一部であるメインパイプ２１の内部にインフレータ３２が設けられるため、メインパイプ２１において、エアバッグ展開初期に生じるインフレータ３２からの衝撃を受け止める耐圧強度を確保することができる。これにより、従来、インフレータを収納していたリテーナに求められる強度設計が不要となる。 According to this aspect, since the inflator 32 is provided inside the main pipe 21, which is a part of the vehicle body frame 2 that requires high rigidity, the main pipe 21 receives the impact from the inflator 32 that occurs at the initial stage of airbag deployment. Pressure resistance strength can be secured. This eliminates the need for a strength design that is conventionally required for a retainer that accommodates an inflator.
　とりわけ、本実施形態との関係では、エアバッグ３１を収納するハウジング３３が大きな強度を持つ必要がなくなるため、ハウジング３３の設計、構造を単純化することができる。これは、エアバッグモジュール３４の一部（ハウジング３３）を、剛性の高いトップチューブ２１ａ、ヘッドパイプ２２及びダウンチューブ２１ｂなどで囲むことで、より一層期待される。したがって、ハウジング３３は、エアバッグ３１の収納性、エアバッグモジュール３４の締結構造（締結点３５）と防水性、さらには必要最低限の筺体強度を確保すれば足り、簡易な構造とすることができる。したがって、エアバッグ装置１０、１００全体としての小型化及び軽量化を図ることができる。 In particular, in relation to this embodiment, the housing 33 that accommodates the airbag 31 does not need to have a large strength, so the design and structure of the housing 33 can be simplified. This is further expected by enclosing a part (housing 33) of the airbag module 34 with the top tube 21a, the head pipe 22, the down tube 21b, and the like having high rigidity. Therefore, the housing 33 can be of a simple structure as long as it is sufficient to secure the storability of the airbag 31, the fastening structure (fastening point 35) and waterproofness of the airbag module 34, and the minimum necessary housing strength. can. Therefore, the overall size and weight of the airbag devices 10 and 100 can be reduced.
　また、インフレータ３２がメインパイプ２１の内部に設けられる一方、エアバッグ３１はメインパイプ２１の外部に設けられるため、両者を分けて個々に配置することができる。したがって、インフレータ３２及びエアバッグ３１の両者の配置に関して、レイアウトの自由度を高めることができる。例えば、図４、７、９及び１０に示すようなレイアウトが可能となる。また、両者の配置が、オートバイ１の操舵系４の位置ではないメインパイプ２１側の位置となるため、エアバッグ３１の展開方向の安定性の確保にも寄与することができる。 Also, since the inflator 32 is provided inside the main pipe 21 and the airbag 31 is provided outside the main pipe 21, both can be separately arranged. Therefore, it is possible to increase the degree of layout freedom regarding the arrangement of both the inflator 32 and the airbag 31 . For example, layouts as shown in FIGS. 4, 7, 9 and 10 are possible. In addition, since both are positioned on the side of the main pipe 21 instead of the position of the steering system 4 of the motorcycle 1, it is possible to contribute to ensuring stability in the deployment direction of the airbag 31 as well.
　また、インフレータ３２とエアバッグ３１とを離して配置しつつ、ガス流路パイプ４０、１４０によってインフレータ３２からの膨張展開用ガスをエアバッグ３１に供給することができる。インフレータ３２からの膨張展開用ガスは、メインパイプ２１内の収納空間７０、１７０に噴出されてからガス流路パイプ４０、１４０に流れ込むが、メインパイプ２１は上記のとおり高い剛性を有している。この高い剛性を有効に利用して、メインパイプ２１の収納空間７０、１７０がある部分が、ガスパイプとして機能する。 Further, while the inflator 32 and the airbag 31 are arranged apart from each other, the gas for inflation/deployment from the inflator 32 can be supplied to the airbag 31 through the gas flow path pipes 40 and 140 . The inflation/deployment gas from the inflator 32 is ejected into the storage spaces 70 and 170 in the main pipe 21 and then flows into the gas flow path pipes 40 and 140. The main pipe 21 has high rigidity as described above. . By effectively utilizing this high rigidity, the portions of the main pipe 21 having the storage spaces 70 and 170 function as gas pipes.
　さらに、ガス流路パイプ４０、１４０があるため、インフレータ３２の残渣がエアバッグ３１に到達することを軽減することもできる。 Furthermore, because of the presence of the gas flow pipes 40 and 140, it is possible to reduce the residue of the inflator 32 from reaching the airbag 31.
　また、上述のハウジング３３の簡素化構造により、エアバッグモジュール３４が小型化するため、エアバッグモジュール３４の車両搭載性も向上する。さらに、ハイブリッド型のインフレータ３２を用いることにより、エアバッグ３１に高い耐熱性の厚い補強布などを設けなくて済むため、エアバッグモジュール３４の小型化及び軽量化を図ることもできる。 In addition, since the airbag module 34 is downsized due to the simplified structure of the housing 33 described above, the vehicle mountability of the airbag module 34 is also improved. Furthermore, by using the hybrid inflator 32, it is not necessary to provide the airbag 31 with a thick reinforcing cloth having high heat resistance, so that the size and weight of the airbag module 34 can be reduced.
　以上説明した実施形態は、本発明の理解を容易にするためのものであり、本発明を限定して解釈するためのものではない。実施形態が備える各要素並びにその配置、材料、条件、形状及びサイズ等は、例示したものに限定されるわけではなく適宜変更することができる。 The embodiments described above are for facilitating understanding of the present invention, and are not for limiting interpretation of the present invention. Each element included in the embodiment and its arrangement, materials, conditions, shape, size, etc. are not limited to those illustrated and can be changed as appropriate.
　さまざまな実施態様に関する追加の考察：
　[実施態様１]
　メインパイプを有する車体フレームを備えたオートバイに搭載されるエアバッグ装置において、
　エアバッグと、
　前記エアバッグに膨張展開用のガスを供給するインフレータと、を備え、
　前記インフレータは、前記メインパイプの内部に設けられ、
　前記エアバッグは、前記メインパイプの外部に設けられ、
　前記インフレータからの前記膨張展開用のガスが、ガス流路パイプを介して前記エアバッグに供給されるように構成された、オートバイ用エアバッグ装置。
[実施態様２]
　前記エアバッグは、ガス導入口を有し、
　前記メインパイプは、ガス導出口を有し、
　前記ガス導入口と前記ガス導出口との間が、前記ガス流路パイプによってつながれる、実施態様１に記載のオートバイ用エアバッグ装置。
[実施態様３]
　前記エアバッグを収納すると共に、前記メインパイプの外面に取り付けられるハウジングをさらに備えており、
　前記ガス流路パイプは、前記ガス導入口と前記ガス導出口との間をつなぐように、前記ハウジング及び前記メインパイプに接続される、実施態様２に記載のオートバイ用エアバッグ装置。
[実施態様４]
　前記ガス流路パイプは、前記ハウジング及び前記メインパイプの一方に溶接され、前記ハウジング及び前記メインパイプの他方に締結手段を介して固定される、実施態様３に記載のオートバイ用エアバッグ装置。
[実施態様５]
　前記インフレータは、前記膨張展開用のガスを放出するガス放出部を有しており、
　前記ガス放出部は、前記メインパイプ内において、前記ガス導出口の近傍に位置可能に構成されている、実施態様２から４のいずれか一項に記載のオートバイ用エアバッグ装置。
[実施態様６]
　前記ガス導入口、前記ガス導出口及び前記ガス放出部は、ほぼ同じライン上に位置可能に構成されている、実施態様５に記載のオートバイ用エアバッグ装置。
[実施態様７]
　前記ガス流路パイプは、前記インフレータを挿通可能なサイズに形成されている、実施態様２から６のいずれか一項に記載のオートバイ用エアバッグ装置。
[実施態様８]
　前記メインパイプの内部には、前記インフレータを収納する収納空間があり、
　前記収納空間は、前記ガス導出口を除いて、閉じた空間となっている、実施態様２から７のいずれか一項に記載のオートバイ用エアバッグ装置。
[実施態様９]
　前記閉じた空間の少なくとも一部は、前記インフレータの外面と前記メインパイプの内面との間に介在させたシール部材によって構成される、実施態様８に記載のオートバイ用エアバッグ装置。
[実施態様１０]
　前記インフレータは、前記メインパイプのトップチューブの内部に設けられる、実施態様１から９のいずれか一項に記載のオートバイ用エアバッグ装置。
[実施態様１１]
　前記インフレータは、前記メインパイプのダウンチューブの内部に設けられる、実施態様１から９のいずれか一項に記載のオートバイ用エアバッグ装置。
[実施態様１２]
　前記インフレータは、前記メインパイプのトップチューブとダウンチューブとをつなぐ中間フレームパイプの内部に設けられる、実施態様１から９のいずれか一項に記載のオートバイ用エアバッグ装置。
[実施態様１３]
　前記インフレータは、複数本あり、前記メインパイプの内部の複数箇所に設けられる、実施態様１から９のいずれか一項に記載のオートバイ用エアバッグ装置。
[実施態様１４]
　前記インフレータは、前記メインパイプに形成された挿入穴であって、前記オートバイにおける搭載部品によって覆われる挿入穴から前記メインパイプの内部へと挿入可能なサイズに形成されている、１から１３のいずれか一項に記載のオートバイ用エアバッグ装置。 Additional Considerations Regarding Various Implementations:
[Embodiment 1]
In an airbag device mounted on a motorcycle having a body frame having a main pipe,
an airbag;
an inflator that supplies gas for inflation and deployment to the airbag,
The inflator is provided inside the main pipe,
The airbag is provided outside the main pipe,
An airbag device for a motorcycle, wherein the inflation and deployment gas from the inflator is supplied to the airbag through a gas flow pipe.
[Embodiment 2]
The airbag has a gas inlet,
The main pipe has a gas outlet,
The motorcycle airbag device according to claim 1, wherein the gas inlet and the gas outlet are connected by the gas flow pipe.
[Embodiment 3]
further comprising a housing that accommodates the airbag and is attached to the outer surface of the main pipe;
3. The motorcycle airbag device according to claim 2, wherein the gas flow pipe is connected to the housing and the main pipe so as to connect the gas inlet and the gas outlet.
[Embodiment 4]
4. The motorcycle airbag device according to claim 3, wherein the gas flow pipe is welded to one of the housing and the main pipe and fixed to the other of the housing and the main pipe via fastening means.
[Embodiment 5]
The inflator has a gas release portion for releasing the gas for inflation and deployment,
5. The motorcycle airbag device according to any one of claims 2 to 4, wherein the gas release portion is configured to be positioned in the vicinity of the gas outlet within the main pipe.
[Embodiment 6]
6. The motorcycle airbag device according to claim 5, wherein the gas inlet, the gas outlet, and the gas outlet are configured to be positioned substantially on the same line.
[Embodiment 7]
7. The motorcycle airbag device according to any one of claims 2 to 6, wherein the gas flow pipe is sized to allow the inflator to pass therethrough.
[Embodiment 8]
A storage space for storing the inflator is provided inside the main pipe,
8. The motorcycle airbag device according to any one of claims 2 to 7, wherein the storage space is a closed space except for the gas outlet.
[Embodiment 9]
9. A motorcycle airbag device according to claim 8, wherein at least part of said closed space is constituted by a seal member interposed between the outer surface of said inflator and the inner surface of said main pipe.
[Embodiment 10]
10. The motorcycle airbag device according to any one of claims 1 to 9, wherein the inflator is provided inside the top tube of the main pipe.
[Embodiment 11]
10. The motorcycle airbag device according to any one of claims 1 to 9, wherein the inflator is provided inside the down tube of the main pipe.
[Embodiment 12]
10. The motorcycle airbag device according to any one of claims 1 to 9, wherein the inflator is provided inside an intermediate frame pipe that connects the top tube and the down tube of the main pipe.
[Embodiment 13]
10. The motorcycle airbag device according to any one of claims 1 to 9, wherein a plurality of said inflators are provided at a plurality of positions inside said main pipe.
[Embodiment 14]
13. Any one of 1 to 13, wherein the inflator is formed in an insertion hole formed in the main pipe and is sized so as to be insertable into the main pipe through an insertion hole covered by a component mounted on the motorcycle. 1. The motorcycle airbag device according to claim 1.
１…オートバイ、２…車体フレーム、３…シート、４…操舵系、５…フロントフォーク、６…ハンドル、１０…エアバッグ装置、１１…モジュールカバー、１２…メーター系、１３…燃料タンク、１４…エンジン、２１…メインパイプ、２１ａ…トップチューブ、２１ｂ…ダウンチューブ、２１ｃ…ガス導出口、２１ｅ…中間フレームパイプ、２２…ヘッドパイプ、２３…ピボットフレーム、２４…シートフレーム、３１…エアバッグ、３１ａ…ガス導入口、３２、３２´…インフレータ、３３…ハウジング、３３ａ…底壁、３４…エアバッグモジュール、３５…締結点、４０…ガス流路パイプ、４０ａ…上端、４０ｂ…下端、５１…円筒体、５２…ガス放出部、６０…締結手段、６１…ボルト、６２…ナット、７０…収納空間、７１…シール部材、１００…エアバッグ装置、１２１ｃ…ガス導出口、１４０…ガス流路パイプ、１４０ａ…一端、１４０ｂ…他端、１６１…ボルト、１７０…収納空間、２００…挿入穴 DESCRIPTION OF SYMBOLS 1... Motorcycle, 2... Body frame, 3... Seat, 4... Steering system, 5... Front fork, 6... Handle, 10... Airbag device, 11... Module cover, 12... Meter system, 13... Fuel tank, 14... Engine 21 Main pipe 21a Top tube 21b Down tube 21c Gas outlet 21e Intermediate frame pipe 22 Head pipe 23 Pivot frame 24 Seat frame 31 Airbag 31a Gas introduction port 32, 32' Inflator 33 Housing 33a Bottom wall 34 Airbag module 35 Fastening point 40 Gas flow pipe 40a Upper end 40b Lower end 51 Cylinder Body 52 Gas release portion 60 Fastening means 61 Bolt 62 Nut 70 Storage space 71 Sealing member 100 Airbag device 121c Gas outlet 140 Gas channel pipe 140a...one end, 140b...other end, 161...bolt, 170...storage space, 200...insertion hole

Claims (14)

  1. 　メインパイプを有する車体フレームを備えたオートバイに搭載されるエアバッグ装置において、
    　エアバッグと、
    　前記エアバッグに膨張展開用のガスを供給するインフレータと、を備え、
    　前記インフレータは、前記メインパイプの内部に設けられ、
    　前記エアバッグは、前記メインパイプの外部に設けられ、
    　前記インフレータからの前記膨張展開用のガスが、ガス流路パイプを介して前記エアバッグに供給されるように構成された、オートバイ用エアバッグ装置。     In an airbag device mounted on a motorcycle having a body frame having a main pipe,
    an airbag;
    an inflator that supplies gas for inflation and deployment to the airbag,
    The inflator is provided inside the main pipe,
    The airbag is provided outside the main pipe,
    An airbag device for a motorcycle, wherein the inflation and deployment gas from the inflator is supplied to the airbag through a gas flow pipe.
  2. 　前記エアバッグは、ガス導入口を有し、
    　前記メインパイプは、ガス導出口を有し、
    　前記ガス導入口と前記ガス導出口との間が、前記ガス流路パイプによってつながれる、請求項１に記載のオートバイ用エアバッグ装置。     The airbag has a gas inlet,
    The main pipe has a gas outlet,
    2. The motorcycle airbag device according to claim 1, wherein said gas flow pipe connects said gas inlet and said gas outlet.
  3. 　前記エアバッグを収納すると共に、前記メインパイプの外面に取り付けられるハウジングをさらに備えており、
    　前記ガス流路パイプは、前記ガス導入口と前記ガス導出口との間をつなぐように、前記ハウジング及び前記メインパイプに接続される、請求項２に記載のオートバイ用エアバッグ装置。     further comprising a housing that accommodates the airbag and is attached to the outer surface of the main pipe;
    3. The motorcycle airbag device according to claim 2, wherein the gas flow pipe is connected to the housing and the main pipe so as to connect the gas inlet and the gas outlet.
  4. 　前記ガス流路パイプは、前記ハウジング及び前記メインパイプの一方に溶接され、前記ハウジング及び前記メインパイプの他方に締結手段を介して固定される、請求項３に記載のオートバイ用エアバッグ装置。 4. The motorcycle airbag device according to claim 3, wherein the gas flow pipe is welded to one of the housing and the main pipe, and fixed to the other of the housing and the main pipe via fastening means.
  5. 　前記インフレータは、前記膨張展開用のガスを放出するガス放出部を有しており、
    　前記ガス放出部は、前記メインパイプ内において、前記ガス導出口の近傍に位置可能に構成されている、請求項２から４のいずれか一項に記載のオートバイ用エアバッグ装置。     The inflator has a gas release portion for releasing the gas for inflation and deployment,
    The motorcycle airbag device according to any one of claims 2 to 4, wherein the gas release portion is configured to be positioned in the vicinity of the gas outlet within the main pipe.
  6. 　前記ガス導入口、前記ガス導出口及び前記ガス放出部は、ほぼ同じライン上に位置可能に構成されている、請求項５に記載のオートバイ用エアバッグ装置。 The motorcycle airbag device according to claim 5, wherein the gas introduction port, the gas outlet port and the gas discharge portion are configured to be positioned substantially on the same line.
  7. 　前記ガス流路パイプは、前記インフレータを挿通可能なサイズに形成されている、請求項２から４のいずれか一項に記載のオートバイ用エアバッグ装置。 The airbag device for a motorcycle according to any one of claims 2 to 4, wherein the gas flow pipe is sized to allow the inflator to pass through.
  8. 　前記メインパイプの内部には、前記インフレータを収納する収納空間があり、
    　前記収納空間は、前記ガス導出口を除いて、閉じた空間となっている、請求項２から４のいずれか一項に記載のオートバイ用エアバッグ装置。     A storage space for storing the inflator is provided inside the main pipe,
    5. The motorcycle airbag device according to any one of claims 2 to 4, wherein the storage space is a closed space except for the gas outlet.
  9. 　前記閉じた空間の少なくとも一部は、前記インフレータの外面と前記メインパイプの内面との間に介在させたシール部材によって構成される、請求項８に記載のオートバイ用エアバッグ装置。 The motorcycle airbag device according to claim 8, wherein at least part of said closed space is constituted by a seal member interposed between the outer surface of said inflator and the inner surface of said main pipe.
  10. 　前記インフレータは、前記メインパイプのトップチューブの内部に設けられる、請求項１から４のいずれか一項に記載のオートバイ用エアバッグ装置。 The motorcycle airbag device according to any one of claims 1 to 4, wherein the inflator is provided inside the top tube of the main pipe.
  11. 　前記インフレータは、前記メインパイプのダウンチューブの内部に設けられる、請求項１から４のいずれか一項に記載のオートバイ用エアバッグ装置。 The motorcycle airbag device according to any one of claims 1 to 4, wherein the inflator is provided inside the down tube of the main pipe.
  12. 　前記インフレータは、前記メインパイプのトップチューブとダウンチューブとをつなぐ中間フレームパイプの内部に設けられる、請求項１から４のいずれか一項に記載のオートバイ用エアバッグ装置。 The motorcycle airbag device according to any one of claims 1 to 4, wherein the inflator is provided inside an intermediate frame pipe that connects the top tube and the down tube of the main pipe.
  13. 　前記インフレータは、複数本あり、前記メインパイプの内部の複数箇所に設けられる、請求項１から４のいずれか一項に記載のオートバイ用エアバッグ装置。 The motorcycle airbag device according to any one of claims 1 to 4, wherein there are a plurality of said inflators and they are provided at a plurality of locations inside said main pipe.
  14. 　前記インフレータは、前記メインパイプに形成された挿入穴であって、前記オートバイにおける搭載部品によって覆われる挿入穴から前記メインパイプの内部へと挿入可能なサイズに形成されている、請求項１から４のいずれか一項に記載のオートバイ用エアバッグ装置。 5. The inflator is formed in an insertion hole formed in the main pipe and has a size that allows it to be inserted into the interior of the main pipe through an insertion hole covered by a component mounted on the motorcycle. A motorcycle airbag device according to any one of the preceding claims.
PCT/JP2022/039659 2021-12-20 2022-10-25 Airbag device for motorcycle WO2023119845A1 (en)

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JP2003104262A (en) * 2001-10-02 2003-04-09 Honda Motor Co Ltd Air bag unit

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