WO2021131107A1

WO2021131107A1 - Protective body, airbag device of protective body, and method for operating airbag device of protective body

Info

Publication number: WO2021131107A1
Application number: PCT/JP2020/025297
Authority: WO
Inventors: 勝田　信行
Original assignee: 株式会社ダイセル
Priority date: 2019-12-26
Filing date: 2020-06-26
Publication date: 2021-07-01
Also published as: CN114846205B; JP2021105298A; DE112020006329T5; CN114846205A; JP7284089B2

Abstract

Provided is a protective body fixed to the ground, wherein the protective body: exhibits superior safety compared to the prior art; does not require the securing of a power source; and can suppress a reduction in protective performance over a long period of time. The protective body fixed to the ground comprises: a gas generator; an airbag bag body that is deployed by a gas which is supplied during operation of the gas generator; an operation mechanism that operates the generator; and an outer shell portion that accommodates the gas generator, the airbag bag body, and the operation mechanism. The operation mechanism includes: a startup part that activates the gas generator when the startup part is displaced to a startup position from an initial position at which the startup part is disposed in an initial state which is a state prior to activation of the gas generator; and a transmission member that is connected at one end side to a fixed part provided to the inner wall surface of the outer shell portion and is connected at another end side to the startup part, and that, when the outer shell portion is deformed by an external force, transmits the external force from the fixed part to the startup part so as to displace the startup part from the initial position to the startup position.

Description

A protective body, an airbag device in the protective body, and a method of operating the airbag device in the protective body.

The present invention relates to a protective body, an airbag device in the protective body, and a method of operating the airbag device in the protective body.

Guardrails, fences, etc. are widely known as protective bodies that are fixed to the ground and protect objects such as pedestrians. For example, a guardrail is a protective body provided for the purpose of preventing the vehicle from deviating, and the space is protected by extending along the boundary between the roadway and the sidewalk to protect the space (for example, the sidewalk) and the sidewalk. It is divided into an outer area (for example, a roadway).

A guardrail is generally composed of a beam having appropriate rigidity and toughness and a support column that supports the beam, and has a structure that absorbs energy by deforming the beam and the support column in response to an impact at the time of a collision of a vehicle or the like. ing. Such a protective body such as a guardrail is designed so that the beam and the support column are allowed to be deformed to some extent in order to absorb the collision energy when a collision object such as a vehicle collides. Therefore, when a colliding object such as a vehicle collides with a protective body such as a guardrail, the protective body may be significantly deformed, and a protective body having higher safety than the conventional one is desired.

In Patent Document 1, in a guardrail in which a steel member is erected between columns, a cushioning member filled with a cushioning material inside is attached to the side surface of the steel member on the roadway side so as to extend along the steel member. Technology for reducing damage to vehicles and guardrails that come into contact with guardrails is disclosed.

Japanese Unexamined Patent Publication No. 2011-241571 U.S. Pat. No. 5791811

However, since the conventional cushioning member attached to the guardrail is exposed to the outside, the cushioning member deteriorates due to exposure to ultraviolet rays, rain and wind, etc., and it may be difficult to maintain the protective performance for a long period of time. There is.

On the other hand, as a protective device mounted on an automobile, an airbag device for protecting an occupant in the event of a collision of an automobile has been widely put into practical use. However, in a protective body fixed to the ground, it is not easy to secure a power source for operating the airbag device, and it is difficult to divert the automobile airbag device to the protective body as it is. ..

The technique of the present disclosure has been made in view of the above circumstances, and its purpose is to provide a protective body fixed to the ground with superior safety as compared with the conventional technique, without needing to secure a power source, and for a long period of time. It is an object of the present invention to provide a technique capable of suppressing a decrease in protective performance.

In order to solve the above problems, the technology of this disclosure adopted the following configuration. That is, the protective body of the present disclosure is a protective body fixed to the ground, and includes a gas generator, an airbag bag body that is deployed by the gas supplied from the gas generator when the gas generator is operated, and the like. It includes an operating mechanism for operating the gas generator, the gas generator, the airbag bag body, and an outer shell portion accommodating the operating mechanism, and the operating mechanism is before the operation of the gas generator. One end to the starting part that operates the gas generator and the fixing part provided on the inner wall surface of the outer shell part when the displacement from the predetermined initial position arranged in the initial state to the predetermined starting position is triggered. The side is connected and the other end is connected to the starting portion, and when the outer shell portion is deformed by an external force, the external force is transmitted from the fixed portion to the starting portion so that the starting portion is moved from the initial position to the starting portion. It has a transmission member that is displaced to the starting position.

Here, the transmission member is a wire rod or a band member, and the operating mechanism has a tensioner that exerts tension on the transmission member, and the tension that the tensioner acts on the transmission member in the initial state is , It may be smaller than the operating tension acting on the transmission member when the starting portion is displaced from the initial position to the starting position.

Further, the gas generator is a pressurized gas type gas generator having a filled bottle filled with pressurized gas and a closing member for closing a gas discharge port in the filled bottle, and the operating mechanism is The pressurized gas may be discharged from the gas discharge port by cleaving the closing member when the starting portion is displaced from the initial position to the starting position.

Further, in the protective body of the present disclosure, the gas discharge port of the gas generator and the gas introduction port of the airbag bag body may be connected by a flexible connecting pipe.

Further, the protective body is a protective body fixed to the ground in order to partition the space into a protected area and a non-protected area, and is along a boundary portion between the protected area and the non-protected area. The protective partition wall member may be included, and the outer shell portion may be provided on the protective partition wall member. Further, in that case, the arrangement position of the fixing portion and the initial position of the starting portion in the outer shell portion are set at different positions along the extending direction of the protective partition wall member, respectively, and the transmission member. May be extended along the extension direction of the protective partition member.

Further, the protective body is a protective body fixed to the ground in order to partition the space into a protected area and a non-protected area, and is along a boundary portion between the protected area and the non-protected area. The outer shell portion may be provided on the support column, including an extended protective partition wall member and a support column for supporting the protective partition wall member. Further, in that case, the arrangement position of the fixing portion and the initial position of the starting portion in the outer shell portion are set at different positions along the height direction of the support column, and the transmission member is the transmission member. It may be extended along the height direction of the column.

Further, the outer shell portion has a bag outlet for deploying the airbag bag body to the outside when the gas generator is operated, and a cover member for shielding the bag outlet, and the gas generator of the gas generator. The bag outlet may be opened by the expansion pressure of the airbag bag body during operation.

Further, the protective body may be a guardrail installed at a boundary position between the sidewalk and the roadway.

Further, the technology of the present disclosure can be specified as an airbag device in a protective body fixed to the ground. That is, the airbag device according to the present disclosure includes a gas generator, an airbag bag body developed by the gas supplied from the gas generator when the gas generator is operated, and an operating mechanism for operating the gas generator. The gas generator, the airbag bag body, and the outer shell portion for accommodating the operating mechanism are provided on the protective body, and the operating mechanism is in an initial state before the operation of the gas generator. One end side is connected to the starting portion for operating the gas generator and the fixing portion provided on the inner wall surface of the outer shell portion when the gas generator is displaced from the predetermined initial position arranged in At the same time, the other end side is connected to the starting portion, and when the outer shell portion is deformed by an external force, the external force is transmitted from the fixed portion to the starting portion, so that the starting portion is moved from the initial position to the starting position. It has a transmission member that is displaced to.

Further, the technique of the present disclosure can be specified as a method of operating the airbag device in a protective body fixed to the ground. That is, the technique of the present disclosure is a method of operating an airbag device in a protective body fixed to the ground, and the airbag device is supplied from a gas generator and the gas generator when the gas generator is operated. An airbag bag body deployed by the gas to be deployed, an operating mechanism for operating the gas generator, and an outer shell provided on the protective body and accommodating the gas generator, the airbag bag body, and the operating mechanism. The gas generator is provided, and the gas generator is displaced from a predetermined initial position arranged in the initial state before the operation of the gas generator to a predetermined starting position as the operating mechanism. The outer shell is provided with an actuating portion and a transmission member whose one end side is connected to the fixing portion provided on the inner wall surface of the outer shell portion and whose other end side is connected to the activation portion, and that the outer shell is provided by an external force. When the portion is deformed, the external force is transmitted from the fixed portion to the starting portion via the transmitting member to displace the starting portion from the initial position to the starting position, and the gas generator is transferred to the starting portion. Including operating.

According to the technique according to the present disclosure, in a protective body fixed to the ground, the safety is superior as compared with the conventional technique, it is not necessary to secure a power source, and it is possible to suppress deterioration of the protective performance for a long period of time. Can be provided.

FIG. 1 is a perspective view of a guardrail according to the first embodiment. FIG. 2 is a perspective view of the guardrail according to the first embodiment. FIG. 3 is a diagram showing an internal structure of the airbag device according to the first embodiment. FIG. 4 is a diagram illustrating a detailed structure of the diffuser portion of the gas generator according to the first embodiment and its surroundings. FIG. 5 is a diagram illustrating an operating state of the airbag device according to the first embodiment. FIG. 6 is a diagram illustrating an operating state of the airbag device according to the first embodiment. FIG. 7 is a diagram showing a state in which the activation piece pulled by the operating wire is separated from the support in the airbag device according to the first embodiment. FIG. 8 is a diagram schematically showing an airbag bag body after being deployed in the protected area in the first embodiment. FIG. 9 is a diagram schematically showing an airbag bag body after being deployed in a protected area in the first embodiment. FIG. 10 is a perspective view of the guardrail according to the second embodiment. FIG. 11 is a diagram illustrating an internal structure of a support column in the guardrail according to the second embodiment. FIG. 12 is a diagram showing a state in which the columns of the guardrail according to the second embodiment are deformed. FIG. 13 is a diagram showing a state in which the activation piece pulled by the operating wire is separated from the support in the airbag device according to the second embodiment. FIG. 14 is a diagram schematically showing an airbag bag body after being deployed in a protected area in the guardrail according to the second embodiment. FIG. 15 is a diagram illustrating a protective body according to another embodiment. FIG. 16 is a diagram illustrating a protective body according to another embodiment.

Hereinafter, embodiments of a protective body, an airbag device in the protective body, and an operating method of the airbag device in the protective body according to the present disclosure will be described with reference to the drawings. It should be noted that the configurations and combinations thereof in each embodiment are examples, and the configurations can be added, omitted, replaced, and other changes as appropriate without departing from the gist of the present invention. The present disclosure is not limited by embodiments, but only by the claims.

<Embodiment 1>
1 and 2 are perspective views of a guardrail 1 as a protective body including the airbag device according to the first embodiment. FIG. 1 is a perspective view of the guardrail 1 as viewed from the front side. FIG. 2 is a perspective view of the guardrail 1 as viewed from the rear side.

The guardrail 1 includes a plurality of columns 2, a beam 3 supported between the columns 2, an airbag device 4, and the like. The guardrail 1 is an example of a protective body fixed to the ground GR. The guardrail 1 is installed at a boundary position between the sidewalk and the roadway, and extends along the boundary position. The guardrail 1 is a protective body that divides the space into a protection target area AR1 and a non-protection target area AR2 in order to protect the protection target area AR1 located on the sidewalk side. Suppresses entry into the target area AR1. In FIGS. 1 and 2, for convenience of explanation, a part of the guardrail 1, that is, a pair of columns 2 and a beam 3 erected between the columns 2 are shown.

The support column 2 is, for example, a cylindrical steel support column having a hollow structure inside. Further, the beam 3 is, for example, a steel plate beam formed by bending a steel plate. The beam 3 is an example of a protective partition member, and extends along a boundary between a protected area AR1 which is a space on the sidewalk side and an unprotected area AR2 which is a space on the roadway side. The beam 3 has a protective inner surface 31 facing the protected area AR1 and a protective outer surface 32 facing the non-protected area AR2. Further, the support column 2 is joined to the protection inner surface 31 of the beam 3 so that the support column 2 is arranged in the protection target area AR1. The beam 3 is attached to the support column 2 by, for example, a fixture 5.

In the following, the protection outer surface 32 side facing the protection target area AR2 will be referred to as the front side of the guardrail 1 (beam 3), and the protection inner surface 31 side facing the protection target area AR1 will be described as the back side of the guardrail 1 (beam 3). To do. Further, the direction in which the support column 2 extends with respect to the ground GR will be described as the vertical direction of the guardrail 1. The beam 3 has a central recess 33 formed in the central portion in the height direction, which is recessed toward the back side when viewed from the front side. The central recess 33 extends along the extending direction (longitudinal direction) of the beam 3. However, the shapes of the beam 3 and the support column 2 are not particularly limited.

The guardrail 1 is provided with an airbag device 4 for protecting pedestrians and the like located on the sidewalk (protected area AR1) when, for example, a vehicle traveling on a roadway comes into contact with or collides with the guardrail 1. .. Hereinafter, the details of the airbag device 4 will be described.

FIG. 3 is a diagram showing the internal structure of the airbag device 4 according to the first embodiment. The airbag device 4 has a steel outer shell case 41, and an accommodating portion 40 as an accommodating space for accommodating various parts of the airbag device 4 is formed inside the outer shell case 41. The outer shell case 41 is an example of the outer shell portion. The outer shell case 41 (accommodating portion 40) of the airbag device 4 may be arranged inside the guardrail 1 or may be attached to the outside of the guardrail 1. As shown in FIGS. 1 and 2, in the present embodiment, an example in which the outer shell case 41 (accommodation portion 40) of the airbag device 4 is attached to the beam 3 in the guardrail 1 will be described.

In the examples shown in FIGS. 1 and 2, the outer shell case 41 of the airbag device 4 is arranged in the vicinity of the central portion of the span sandwiched between the pair of columns 2 in the beam 3. Further, the outer shell case 41 of the airbag device 4 is provided in the central recess 33 of the beam 3. The outer shell case 41 has a front wall 411, a rear wall 412, an upper wall 413, a lower wall 414, a pair of left and right side walls 415, and the like.

Further, a bag outlet 416 is formed in the rear wall 412 of the outer shell case 41, and the bag outlet 416 is shielded by a cover member 417. The cover member 417 is made of a material having a lower strength than each steel wall body forming the outer shell case 41, for example, a thin resin material. A part of the outer shell case 41 may be formed of a steel plate forming the beam 3. In other words, a part of the steel plate forming the beam 3 may also serve as a part or the whole of the outer shell case 41.

As shown in FIG. 3, the gas generator 50, the airbag bag body 60, the operating mechanism 70, and the like are housed inside the outer shell case 41, that is, in the housing part 40. The airbag bag body 60 is arranged in a folded state at a predetermined position in the accommodating portion 40. The mode of the airbag bag body 60 in the accommodating portion 40 is not particularly limited. For example, the airbag bag body 60 in the accommodating portion 40 may be folded by a bellows fold, may be folded by a roll fold, or may be folded in another form. The airbag bag body 60 may be positioned at a predetermined position of the accommodating portion 40 by being held by an appropriate holding member (not shown) provided on the inner wall surface of the outer shell case 41, for example. good. Further, as shown in FIG. 3, the arrangement position of the airbag bag body 60 and the position of the cover member 417 are such that the airbag bag body 60 faces the cover member 417 in a state of being housed in the outer shell case 41. The size etc. are specified. Note that FIG. 3 shows the state of the airbag device 4 before the gas generator 50 is activated.

The type of the gas generator 50 is not particularly limited, but the gas generator 50 in the present embodiment is a stored gas type gas generator having a filling bottle 51 filled with pressurized gas. When the filling bottle 51 is opened when the gas generator 50 is operated, pressurized gas is supplied to the airbag bag body 60, and the airbag bag body 60 expands. As the pressurized gas filled in the filling bottle 51, an appropriate gas suitable for expanding and expanding the airbag bag body 60, such as argon or helium, can be used. The filling bottle 51 of the gas generator 50 is fixed to the outer shell case 41 by an appropriate fixing member 53. In the example shown in FIG. 3, the filling bottle 51 of the gas generator 50 is fixed to the inner wall surface 411A of the front wall 411 of the outer shell case 41. However, the filling bottle 51 of the gas generator 50 may be fixed to another wall surface of the outer shell case 41.

Further, as shown in FIGS. 1 to 3, the bag outlet 416 of the outer shell case 41 in the airbag device 4 is opened in the rear wall 412 facing the protected area AR1 located on the sidewalk side. The bag outlet 416 is an opening for deploying the airbag bag body 60 to the outside of the outer shell case 41 (accommodation portion 40) when the gas generator 50 is operated. The cover member 417 that shields the bag outlet 416 of the outer shell case 41 is the airbag bag body 60 in the process of expanding the airbag bag body 60 by the pressurized gas supplied from the filling bottle 51 when the gas generator 50 is operated. It comes off the rear wall 412 or is destroyed by the expansion pressure of. As a result, the bag outlet 416 is opened. In this way, the bag outlet 416 of the outer shell case 41 is opened by the expansion pressure of the airbag bag body 60, so that the inside and outside of the outer shell case 41 communicate with each other, and as a result, air is supplied to the protected area AR1 located on the sidewalk side. The bag bag body 60 is deployed.

The cover member 417 in the outer shell case 41 is simplified with respect to the rear wall 412 so that the cover member 417 can be detached from the rear wall 412 to the outside by the expansion pressure of the airbag bag body 60 when the gas generator 50 is operated. It may be attached as a target. Further, a fragile portion (for example, a tear line) having a thickness smaller than that of other portions of the cover member 417 may be extended at an appropriate position on the cover member 417. In this case, when the gas generator 50 is operated, the cover member 417 is broken by the expansion pressure of the airbag bag body 60 starting from the fragile portion, so that the bag outlet 416 is opened.

As shown in FIG. 3, the gas generator 50 has a filling bottle 51 filled with pressurized gas, a diffuser portion 52 provided on the outlet end portion 511 side of the filling bottle 51, and the like. The filling bottle 51 and the diffuser portion 52 are made of a metal such as stainless steel. The filling bottle 51 and the diffuser portion 52 may be joined to each other by welding or the like, or may be integrally molded.

FIG. 4 is a diagram illustrating a detailed structure of the diffuser portion 52 of the gas generator 50 according to the first embodiment and its surroundings. A pressurized gas chamber 510 is formed inside the filling bottle 51, and the pressurized gas chamber 510 is filled with the pressurized gas. Further, the outlet end portion 511 of the filling bottle 51 has a tubular shape, and the gas discharge port 512 is opened at the outlet end portion 511. Further, the outlet end portion 511 of the filling bottle 51 is provided with a closing member 513 such as a burst disk that closes the gas discharge port 512. The closing member 513 is formed of a thin-walled disk made of metal such as iron or stainless steel, and seals the gas discharge port 512. Further, in the example shown in FIG. 4, the closing member 513 is deformed into a bowl shape toward the diffuser chamber 523 side of the diffuser portion 52 by receiving the pressure of the pressurized gas filled in the pressurized gas chamber 510.

The diffuser portion 52 is, for example, a member having a bottomed tubular shape, and includes a tubular wall portion 521 and a bottom wall portion 522 that closes an end portion of the tubular wall portion 521, and is hollow inside. A diffuser chamber 523 is formed. As shown in FIG. 4, the closing member 513 that closes the gas discharge port 512 of the filling bottle 51 is arranged so that its outer surface 513A faces the diffuser chamber 523. Here, when the gas discharge port 512 is opened by cleaving the closing member 513, the pressurized gas in the pressurized gas chamber 510 flows out from the gas discharge port 512 to the diffuser chamber 523.

Here, one end of a discharge pipe 524 having a hollow tubular shape for discharging pressurized gas from the diffuser chamber 523 is connected to the tubular wall portion 521 of the diffuser portion 52. An internal passage for passing the pressurized gas is formed inside the discharge pipe 524. However, the discharge pipe 524 may be connected to the bottom wall portion 522, for example, as long as the pressurized gas for supplying the pressurized gas from the filling bottle 51 to the airbag bag body 60 can be discharged from the diffuser chamber 523. Further, in the tubular wall portion 521 of the diffuser portion 52, a communication hole 521A is formed at a position where the discharge pipe 524 is connected, and the communication hole 521A communicates the internal passage of the discharge pipe 524 with the diffuser chamber 523. Has been done.

Further, at the other end of the discharge pipe 524, a gas discharge port 524A for discharging the pressurized gas flowing from the diffuser chamber 523 toward the airbag bag body 60 is formed. The air bag body 60 has a gas introduction port 61 for introducing pressurized gas inside, and the gas discharge port 524A in the discharge pipe 524 and the gas introduction port 61 in the airbag bag body 60 are flexible. It is airtightly connected by a connecting pipe 54 having a (see FIG. 3). The connecting pipe 54 may be, for example, a bellows-shaped flexible hose.

Next, the detailed structure of the operating mechanism 70 will be described. The operating mechanism 70 includes a support 71, a starting piece 72 as a starting portion, an operating wire 73 as a transmission member, a pulley 74, and the like. The support 71 is a member that supports the activation piece 72, and is fixed to the tubular wall portion 521 of the diffuser portion 52. The support 71 extends from the tubular wall portion 521 toward the radial center side in the diffuser chamber 523, and the activation piece 72 is integrated with the fragile portion 711 formed at the tip of the support 71. It is connected. The fragile portion 711 formed at the tip of the support 71 is made of a material that is fragile to an external force, and its cross section is smaller than the cross section of the activation piece 72.

Further, the starting piece 72 has a first surface 721 facing the outer surface 513A of the closing member 513 and a second surface 722 facing the opposite side. In the present embodiment, the first surface 721 and the second surface 722 of the activation piece 72 are formed as flat surfaces.

As shown in FIG. 4, in the state before the operation of the gas generator 50, the outer surface 513A of the closing member 513 is in contact with the first surface 721 of the activation piece 72 in the operation mechanism 70. Here, the strength of the closing member 513 is set so that the burst pressure when the closing member 513 is cleaved is smaller than the filling pressure of the pressurized gas. In other words, the strength of the closing member 513 is set to such an extent that it cannot withstand the filling pressure of the pressurized gas. Then, the activation piece 72 supported by the support 71 in the operating mechanism 70 supports the closing member 513 from the diffuser chamber 523 side, so that the opening of the closing member 513 is suppressed. That is, the closing member 513 is suppressed from being cleaved as long as it is supported by the starting piece 72, but is cleaved when the supporting force from the starting piece 72 is lost. As shown in FIG. 4, the position where the starting piece 72 is arranged in the initial state before the operation of the gas generator 50 is defined as the “initial position P1”. That is, in the initial state in which the starting piece 72 is arranged at the initial position P1, the starting piece 72 supports the closing member 513 from the diffuser chamber 523 side, thereby suppressing the cleavage of the closing member 513. On the other hand, when the starting piece 72 is displaced from the initial position P1 to a predetermined starting position P2 different from the initial position P1, the supporting force of the starting piece 72 to support the closing member 513 is lost. As a result, when the closing member 513 is cleaved, the gas discharge port 512 in the filling bottle 51 is opened, and the pressurized gas is discharged from the gas discharge port 512.

Further, the first end portion 731 of the actuating wire 73 is fixed to the second surface 722 of the actuating piece 72 of the actuating mechanism 70. The first end portion 731 of the operating wire 73 may be moored to a fixture 723 such as a circular ring member fixed to the second surface 722 of the activation piece 72, for example. Further, a seal member 75 is provided at the first end portion 731 of the operating wire 73. The seal member 75 may have, for example, a disk shape. On the other hand, the second end portion 732, which is the end portion of the operating wire 73 opposite to the first end portion 731, is fixed to the inner wall surface of the outer shell case 41 (see FIG. 3). In the example shown in FIG. 3, the second end portion 732 of the operating wire 73 is fixed to the fixture 76 provided on the inner wall surface 411A of the front wall 411 of the outer shell case 41. In the present embodiment, the fixture 76 is an example of the fixing portion. The fixture 76 may be, for example, a circular ring member provided on the inner wall surface of the outer shell case 41, or the second end portion 732 of the operating wire 73 may be moored to the fixture 76. In the present embodiment, the operating wire 73 is formed of a metal wire, but it may be formed of another material. Further, as shown in FIG. 3, the operating wire 73 is bridged to a pulley 74 provided in the accommodating portion 40 in the outer shell case 41. The pulley 74 is a fixed pulley, and has a disk that guides the direction of the operating wire 73 that is bridged over the pulley 74, and a rotating shaft that rotatably supports the disk. The rotation shaft of the pulley 74 is fixed to, for example, the upper wall 413 or the lower wall 414 of the outer shell case 41.

Further, as shown in FIG. 4, an insertion hole 522A through which the operating wire 73 is inserted is formed in the bottom wall portion 522 of the diffuser portion 52. The insertion hole 522A penetrates the bottom wall portion 522 in the material thickness direction. Further, the insertion hole 522A has an inner diameter larger than the diameter of the operation wire 73, and the operation wire 73 is slidable along the inner peripheral surface of the insertion hole 522A. Further, the inner diameter of the insertion hole 522A in the diffuser portion 52 is set to a dimension smaller than the diameter of the seal member 75.

Next, the operation contents of the airbag device 4 provided in the guardrail 1 will be described. In the airbag device 4 of the present embodiment, for example, when a vehicle traveling on a roadway (non-protection target area AR2) comes into contact with or collides with a guardrail 1, the gas generator 50 operates and the protection target is located on the sidewalk side. Pedestrians and the like are protected by deploying the airbag bag body 60 in the area AR1. More specifically, in the airbag device 4, the beam 3 and the outer shell case 41 installed on the beam 3 are deformed by an external force caused by a vehicle or the like coming into contact with or colliding with the guardrail 1 from the roadway side. The operating mechanism 70 functions, and the operating mechanism 70 operates the gas generator 50 by utilizing the external force acting on the outer shell case 41.

FIG. 5 is a diagram illustrating an operating state of the airbag device 4 according to the first embodiment. For example, when a vehicle traveling on a roadway collides with the protective outer surface 32 of the beam 3 of the guardrail 1, the outer shell case 41 installed on the beam 3 is deformed due to the external force accompanying the collision of the vehicle. For example, in the outer shell case 41, the front wall 411 mainly facing the roadway (non-protected area AR2) side is deformed so as to be curved toward the protected area AR1 side. In this way, when the outer shell case 41 (mainly the front wall 411) is deformed by an external force, the activation piece 72 to which the first end portion 731 of the actuating wire 73 is connected and the second end portion 732 of the actuating wire 73 are connected. The relative position with the connected fixture 76 changes, and the path length (hereinafter, referred to as “wire path length”) of the operating wire 73 increases as compared with that before the outer shell case 41 is deformed.

The wire path length of the operating wire 73 is the path of the operating wire 73 from the fixture 76 provided on the inner wall surface 411A of the front wall 411 of the outer shell case 41 to the fixture 723 provided on the activation piece 72. It is long. In the present embodiment, since the operating wire 73 is stretched on the pulley 74, the wire path length of the operating wire 73 is the linear distance between the fixture 76 and the pulley 74 and the linear distance between the fixture 723 and the pulley 74. It roughly matches the sum with the distance.

As described above, since both ends of the operating wire 73 are fixed to the fixture 723 of the starting piece 72 and the fixture 76 of the front wall 411, respectively, the wire path length increases due to the deformation of the outer shell case 41. Then, the operating wire 73 becomes tense, and tensile stress is generated in the path length direction of the operating wire 73 (which can also be said to be the drawing axial direction of the operating wire 73). In this way, the tension acting on the actuating wire 73 is transmitted to the fixture 723 of the actuating piece 72 via the actuating wire 73. That is, the operating wire 73 transmits the tension (external force) associated with the collision of the vehicle with the guardrail 1 from the fixture 76 of the front wall 411 to the fixture 723 of the starting piece 72. As a result, the activation piece 72 arranged in the diffuser chamber 523 is pulled by the actuating wire 73 in the direction of the arrow F shown in FIG. 6, that is, in the direction away from the closing member 513. As a result, the fragile portion 711 of the support 71 is torn and destroyed, and the activation piece 72 is separated (separated) from the support 71. As a result, the starting piece 72 is displaced from the initial position P1 described with reference to FIG. 4 to a starting position P2 different from the initial position P1.

FIG. 7 is a diagram showing a state in which the starting piece 72 pulled by the operating wire 73 is separated from the support 71 in the airbag device 4 according to the first embodiment. As shown in FIG. 7, when the starting piece 72 is displaced from the initial position P1 to the starting position P2, the starting piece 72 loses the supporting force that previously supported the closing member 513, and the filling bottle 51 (pressurized gas chamber) The closing member 513 cannot withstand the filling pressure of the pressurized gas filled in 510), and the closing member 513 is cleaved. As a result, the gas discharge port 512 in the filling bottle 51 is opened, and the pressurized gas in the pressurized gas chamber 510 is discharged from the gas discharge port 512 to the diffuser chamber 523. That is, the gas generator 50 operates.

In the present embodiment, the seal member 75 is attached to the first end portion 731 of the actuating wire 73, and the inner diameter of the insertion hole 522A in the bottom wall portion 522 of the diffuser portion 52 is larger than the diameter of the seal member 75. small. Therefore, after the starting piece 72 is separated from the support 71, as shown in FIG. 7, the seal member 75 provided at the first end portion 731 of the operating wire 73 serves as a stopper to prevent the diffuser portion 52 from coming off. The insertion hole 522A in the bottom wall portion 522 is closed.

Further, the pressurized gas discharged from the gas discharge port 512 of the filling bottle 51 to the diffuser chamber 523 passes through the communication hole 521A, the discharge pipe 524, and the connecting pipe 54 formed in the tubular wall portion 521. It is supplied from the gas inlet 61 of the airbag bag body 60 to the inside of the airbag bag body 60 (see FIG. 3 and the like). In this way, by starting the supply of the pressurized gas to the airbag bag body 60 arranged in the accommodating portion 40, the expansion of the airbag bag body 60 is started.

In the process of expanding the airbag bag body 60 in the accommodating portion 40 of the outer shell case 41, the expansion pressure of the airbag bag body 60 acts on the cover member 417 that shields the bag outlet 416 of the outer shell case 41. As a result, the cover member 417 is pressed from the inside to the outside, detached from the rear wall 412, or destroyed. As a result, as shown in FIG. 5, the bag outlet 416 is opened, and the airbag bag body 60 that expands due to the supply of pressurized gas is expanded from the bag outlet 416 to the outside of the outer shell case 41 (accommodation portion 40). Can be done. Further, since the bag outlet 416 of the outer shell case 41 is provided facing the protected area AR1 (sidewalk), the airbag bag body 60 can be deployed in the protected area AR1 (sidewalk). Note that FIG. 5 shows a state in which the airbag bag body 60 is being deployed in the protected area AR1 (sidewalk).

8 and 9 are diagrams schematically showing the airbag bag body 60 after being deployed in the protected area AR1 (sidewalk) in the first embodiment. FIG. 8 schematically shows a state in which the guardrail 1 is viewed from above, and FIG. 9 schematically shows a state in which the guardrail 1 is viewed from the side surface side.

The guardrail 1 in the present embodiment operates the airbag device 4 (gas generator 50) when a large external force acts on the guardrail 1, such as when a colliding object such as a vehicle collides, and protects the protected area AR1 (sidewalk). The airbag bag body 60 can be deployed in the air bag. As a result, it is possible to preferably protect a protected object such as a pedestrian in the protected area AR1 (sidewalk). That is, according to the guardrail 1, the safety of the protected area AR1 (sidewalk) can be further ensured.

Further, according to the guardrail 1 in the present embodiment, in the normal state (before the operation of the airbag device 4), the airbag bag body 60 is compactly housed inside the outer shell case 41 in a folded state. , The guardrail 1 can be made less bulky. Therefore, it is difficult to obstruct the passage of pedestrians. Further, as described above, in the normal state (before the operation of the airbag device 4), since the airbag bag body 60 is housed inside the outer shell case 41, the airbag bag body 60 is exposed to ultraviolet rays for a long period of time. , It is possible to suppress exposure to rain and wind. Therefore, even when the guardrail 1 is used for a long period of time, it is possible to prevent the airbag bag body 60 from deteriorating. Thereby, it is possible to provide the guardrail 1 in which the protective performance does not deteriorate for a long period of time.

Further, since the guardrail 1 in the present embodiment is a method of expanding and deploying the airbag bag body 60 by using the gas supplied from the gas generator 50, it is possible to suppress an excessive increase in the weight of the guardrail 1. Therefore, it is not necessary to increase the mounting structure for attaching the beam 3 to the support column 2 or to increase the strength, and the material cost is unlikely to increase excessively. From the above, according to the guardrail 1 in the present embodiment, the safety of the protected area AR1 can be further ensured as compared with the conventional case, and the guardrail 1 is excessively bulky or has an excessive increase in weight. It is possible to provide a protective body fixed to the ground without deteriorating the protective performance for a long period of time.

Further, as shown in FIG. 9, in the airbag bag body 60, the unfolding width (height dimension) Ha in the height direction after unfolding is larger than the height dimension Hb of the beam 3 as a protective partition member. It is designed to be. According to such an airbag bag body 60, the entire beam 3 in the height direction can be covered by the airbag bag body 60 after deployment. Therefore, pedestrians in the protected area AR1 (sidewalk) can be protected more safely.

Further, as shown in FIG. 3, in the airbag device 4 of the present embodiment, the gas generator 50 housed in the outer shell case 41 (accommodating portion 40) is arranged at a position not facing the cover member 417. There is. In this way, by arranging the gas generator 50 so as not to face the cover member 417 whose strength is lower than that of the wall body forming the outer shell case 41, gas is generated when a vehicle or the like violently collides with the guardrail 1. Even if the housing of the generator 50 (filled bottle 51 in this embodiment) is damaged by any chance, the safety of the surroundings can be secured even more appropriately.

Further, in the guard rail 1 of the present embodiment, since the airbag bag body 60 is arranged in the accommodating portion 40 so as to face the cover member 417 of the outer shell case 41, the airbag bag body is arranged in the accommodating portion 40. In the process of expansion of 60, the expansion pressure of the airbag bag body 60 is likely to act on the cover member 417, and the bag outlet 416 of the outer shell case 41 can be smoothly opened.

The airbag device 4 of the guardrail 1 in the present embodiment utilizes an external force that deforms the outer shell case 41 when the outer shell case 41 is deformed by an external force when a colliding object such as a vehicle collides with the guardrail 1. It includes an operating mechanism 70 that operates the gas generator 50 by a mechanical mechanism. According to this, it is not necessary to secure a power source for operating the gas generator 50. Therefore, the airbag device 4 in the present embodiment is particularly suitable as an airbag device installed on a protective body fixed to the ground where it is not easy to secure a power source. Further, according to the airbag device 4 in the present embodiment, a sensor for detecting a collision of a colliding object with the guardrail 1 is also unnecessary. Further, according to the airbag device 4 and the operating method thereof in the present embodiment, the airbag device 60 can be operated without using electric power, and the airbag bag body 60 can be expanded and deployed, so that there are restrictions on the installation location. The guardrail 1 can be installed without. That is, by applying the airbag device 4 in the present embodiment, it is possible to provide a guardrail 1 having a very high degree of freedom regarding the installation location.

Further, in the airbag device 4 of the present embodiment, the arrangement position of the fixture 76 in the outer shell case 41 (outer shell portion) and the initial position P1 of the activation piece 72 (starting portion) are the beam 3 (protective partition member). The operating wire 73 (transmission member) is extended along the extension direction of the beam 3 (protective partition member). According to this, when the outer shell case 41 is deformed due to the collision of the vehicle with the beam 3, tension is likely to be generated in the operating wire 73. As a result, when the vehicle collides with the beam 3, the starting piece 72 can be smoothly displaced from the initial position P1 to the starting position P2, and the airbag device 4 (gas generator 50) can be operated with high accuracy.

Further, in the airbag device 4 in the present embodiment, as described with reference to FIG. 7, when the operating mechanism 70 operates the gas generator 50, the seal member 75 provided at the first end portion 731 of the operating wire 73 is provided. It is configured to prevent the bottom wall from coming off and to close the insertion hole 522A in the bottom wall portion 522. As a result, it is possible to prevent the pressurized gas discharged from the filling bottle 51 into the diffuser chamber 523 from leaking from the insertion hole 522A. At that time, the seal member 75 positioned in the insertion hole 522A in the diffuser portion 52 has a bottom wall portion due to the pressure of the pressurized gas while the pressurized gas is being supplied from the filling bottle 51 to the diffuser chamber 523. Pressed against 522. Therefore, the insertion hole 522A can be more reliably closed by the seal member 75, and the leakage of the pressurized gas can be suppressed. Therefore, the pressurized gas can be quickly supplied from the gas generator 50 (filled bottle 51) to the airbag bag body 60 to expand the airbag bag body 60. Further, it is possible to prevent the amount of pressurized gas supplied from the gas generator 50 (filled bottle 51) to the airbag bag body 60 from being reduced.

Further, in the airbag device 4 in the present embodiment, as described above, the gas discharge port 524A in the discharge pipe 524 and the gas introduction port 61 in the airbag bag body 60 are connected by a flexible connecting pipe 54. Therefore, when a vehicle or the like collides with the guardrail 1, even if the outer shell case 41 is significantly deformed, the flow path of the pressurized gas supplied from the gas generator 50 side to the airbag bag body 60 may be blocked or excessive. It is possible to preferably suppress the narrowing of the gas. However, the connecting pipe 54 does not necessarily have to have flexibility. For example, the discharge pipe 524 is directly connected to the gas introduction port 61 of the airbag bag body 60 without interposing the connecting pipe 54 between the discharge pipe 524 of the diffuser portion 52 and the gas introduction port 61 of the airbag bag body 60. You may connect to the target.

Further, in the operating mechanism 70 of the airbag device 4 in the present embodiment, the pulley 74 may be a tension pulley (tensioner) that applies tension to the operating wire 73. By providing the pulley 74 that functions as a tensioner in the operating mechanism 70, it is possible to prevent the operating wire 73 from bending. As a result, when a vehicle or the like collides with the guardrail 1, tension is likely to be generated in the operating wire 73, and the airbag device 4 (gas generator 50) can be operated with high accuracy. When the pulley 74 is a tension pulley, the magnitude of the tension (initial tension) that the pulley 74 (tensioner) acts on the operating wire 73 in the initial state before the vehicle or the like collides with the guardrail 1 is determined by the diffuser chamber. The starting piece 72 arranged at 523 is set to be smaller than the working tension acting on the working wire 73 when the starting piece 72 is displaced from the initial position P1 to the starting position P2. As a result, it is possible to prevent the airbag device 4 (gas generator 50) from being erroneously operated before the vehicle or the like collides with the guardrail 1. Of course, in the initial state, the tensioner that exerts tension on the operating wire 73 may be arranged separately from the pulley 74.

In the guardrail 1 provided with the airbag device 4 in the present embodiment, the deployment mode of the airbag bag body 60, for example, the shape, position, size, etc. of the airbag bag body 60 after deployment is not particularly limited. .. Further, the installation location, the number of installations, and the like of the airbag device 4 on the guardrail 1 are not particularly limited. Further, in the present embodiment, the operating wire 73, which is a wire rod, is used as the transmission member in the operating mechanism 70, but the present invention is not limited to this. For example, a band material may be used instead of the operating wire 73 to transmit the external force acting on the outer shell case 41 from the fixture 76 provided on the outer shell case 41 to the activation piece 72, and the transmission function may be transmitted. Various forms can be adopted as long as they are exhibited.

<Embodiment 2>
Next, the guardrail 1A as a protective body provided with the airbag device according to the second embodiment will be described. FIG. 10 is a perspective view of the guardrail 1A according to the second embodiment. FIG. 10 shows a state in which the guardrail 1A is viewed from the rear side, and the same reference reference numerals are given to the configurations common to those in the first embodiment, and detailed description thereof will be omitted.

Also in the guardrail 1A in the present embodiment, the beam 3 is supported by the support column 2 as in the guardrail 1 according to the first embodiment. Further, the support column 2 is joined to the protection inner surface 31 of the beam 3 so that the support column 2 is arranged in the protection target area AR1. Further, in the guardrail 1A in the present embodiment, the airbag device 4A is provided not on the beam 3 but on the support column 2. The strut 2 has a hollow structure inside, and a housing portion 40 for accommodating various parts of the airbag device 4A is formed inside the strut 2. Reference numeral 20 shown in FIG. 10 is a cylindrical wall in the support column 2, and an accommodating portion 40 is formed inside the cylindrical wall 20. In the present embodiment, the cylindrical wall 20 in which the accommodating portion 40 is formed inside is an example of the outer shell portion. Further, in the cylindrical wall 20 of the support column 2, a bag outlet 416 is formed as an opening in a portion (hereinafter referred to as “first portion”) 20A facing the protection target region AR1, and the bag outlet 416 is a cover member. It is shielded by 417.

FIG. 11 is a diagram illustrating the internal structure of the support column 2 in the guardrail 1A according to the second embodiment. The accommodating portion 40 formed inside the cylindrical wall 20 accommodates the gas generator 50, the airbag bag body 60, the operating mechanism 70, and the like that constitute the airbag device 4A. The airbag device 4A has substantially the same structure as the airbag device 4 according to the first embodiment, except that the airbag device 4A is provided on the support column 2.

As shown in FIG. 11, a folded airbag bag body 60 is arranged in the accommodating portion 40. Further, the filling bottle 51 in the gas generator 50 is fixed to the first portion 20A in the cylindrical wall 20. Further, the diffuser portion 52 of the gas generator 50 has the same structure as that of the first embodiment (see FIGS. 3, 4, etc.), and the gas in the discharge pipe 524, the connecting pipe 54, and the airbag bag body 60 in the diffuser portion 52. The connection mode of the introduction port 61 is the same as that of the airbag device 4 according to the first embodiment. The detailed structure of the operating mechanism 70 will be described. In the present embodiment as well, the operating mechanism 70 includes the support 71, the starting piece 72, the operating wire 73, the pulley 74, and the like, as in the first embodiment. Then, in a state where the starting piece 72 in the operating mechanism 70 is arranged at the initial position P1 in the diffuser chamber 523, the closing member 513 that closes the gas discharge port 512 in the filling bottle 51 is used as the filling pressure of the pressurized gas. I support it against it. As a result, in the initial state before the vehicle collides with the guardrail 1A, the closing member 513 is suppressed from being cleaved by the filling pressure of the pressurized gas. Further, in the operating wire 73 as a transmission member in the operating mechanism 70, as in the first embodiment, the first end portion 731 is moored to the fixture 723 fixed to the activation piece 72, and the second end portion 732 is the fixture 76. Moored at. Here, the fixture 76 to which the second end portion 732 of the operating wire 73 is connected is provided on the inner wall surface of the first portion 20A of the cylindrical wall 20. Further, as shown in FIG. 11, the airbag bag body 60 is arranged at a position facing the bag outlet 416 and the cover member 417 formed in the first portion 20A of the cylindrical wall 20 in the support column 2. On the other hand, the filling bottle 51 in the gas generator 50 is arranged at a position not facing the cover member 417.

Here, when a colliding object such as a vehicle collides with the beam 3 in the vicinity of the support column 2 of the guardrail 1A, the upper end side of the support column 2 is tilted toward the protection target area AR1 (sidewalk) side as shown in FIG. The support column 2 is deformed. In FIG. 12, for convenience, the illustration of the internal structure of the support column 2 is omitted.

The airbag device 4A in the present embodiment operates the gas generator 50 by the operating mechanism 70 when the cylindrical wall 20 of the support column 2 as the outer shell is deformed by the collision of the vehicle with the guardrail 1A. That is, from the initial state shown in FIG. 11, the starting piece 72 to which the first end portion 731 of the operating wire 73 is connected and the operating wire 73 in the process of deforming the cylindrical wall 20 of the support column 2 as shown in FIG. Tension is generated in the working wire 73 due to the change in the relative position with the fixture 76 to which the second end portion 732 of the working wire 73 is connected and the increase in the wire path length in the working wire 73. The tension generated in the actuating wire 73 is transmitted to the fixture 723 of the actuating piece 72 via the actuating wire 73, so that the actuating piece 72 is pulled away from the closing member 513. In this way, when the cylindrical wall 20 of the support column 2 is deformed by an external force at the time of a vehicle collision, the external force is transmitted from the fixture 76 provided on the cylindrical wall 20 to the activation piece 72 via the operating wire 73. , A large moment is applied to the fragile portion 711 of the support 71, and the fragile portion 711 can be broken. As a result, as shown in FIG. 13, the starting piece 72 is separated from the support 71, and the starting piece 72 can be displaced from the initial position P1 to the starting position P2.

That is, as shown in FIG. 13, when the starting piece 72 is separated from the support 71 and the starting piece 72 is separated from the closing member 513, the closing member 513 is supported so as to oppose the filling pressure of the pressurized gas until then. The supporting power that was being used is lost. As a result, the closing member 513 is cleaved and the gas discharge port 512 in the filling bottle 51 is opened.

The pressurized gas discharged from the gas discharge port 512 of the filling bottle 51 to the diffuser chamber 523 passes through the communication hole 521A, the discharge pipe 524, and the connecting pipe 54 in the diffuser portion 52, and is passed through the gas introduction port 61 to the airbag bag body 60. It is supplied to the inside of the (see FIG. 11). As described above, when the vehicle collides with the guard rail 1A, the operating mechanism 70 mechanically operates the gas generator 50 when the cylindrical wall 20 of the support column 2 as the outer shell is deformed, so that the gas is generated. The supply of pressurized gas from the generator 50 to the airbag bag body 60 is started.

Also in the airbag device 4A of the present embodiment, the airbag bag body 60 accommodated in the accommodating portion 40 has a cover member 417 that shields the bag outlet 416 formed in the first portion 20A of the cylindrical wall 20. They are arranged so as to face each other. Therefore, in the process of expanding the airbag bag body 60 in the accommodating portion 40, the expansion pressure of the airbag bag body 60 acts on the cover member 417, and the cover member 417 is separated from the cylindrical wall 20 (first portion 20A). Alternatively, the bag outlet 416 is opened by being destroyed. As a result, the airbag bag body 60 pops out and deploys to the external protected area AR1 through the bag outlet 416. FIG. 14 is a diagram schematically showing the airbag bag body 60 after being deployed in the protected area AR1 (sidewalk) in the guardrail 1A according to the second embodiment, showing a state in which the guardrail 1 is viewed from above. There is.

As shown in FIG. 14, also in the guardrail 1A of the present embodiment, the gas generator 50 is generated by the operating mechanism 70 when the cylindrical wall 20 of the support column 2 is deformed by an external force (impact) caused by a collision of a vehicle or the like. It can be activated to deploy the airbag bag body 60 in the protected area AR1 (sidewalk). As a result, pedestrians in the protected area AR1 (sidewalk) can be suitably protected, and the safety of the protected area AR1 can be further ensured. Then, when the cylindrical wall 20 of the support column 2 is deformed by the collision energy of a vehicle or the like, the operating mechanism 70 uses the collision energy to operate the gas generator 50 by a mechanical mechanism without using electric power. Can be done. Therefore, the airbag device 4A and its operating method in the present embodiment are applied to a protective body that is often installed in an environment where it is difficult to secure an external power source, such as a guardrail 1A installed along a road. The merit of doing so becomes particularly remarkable.

Further, in the airbag device 4A in the present embodiment, the arrangement position of the fixture 76 on the cylindrical wall 20 (outer shell portion) of the support column 2 and the initial position P1 of the activation piece 72 (activation portion) are as shown in FIG. It is set at different positions along the height direction of the columns. According to this, when the cylindrical wall 20 of the support column 2 is deformed due to the collision of the vehicle with the guardrail 1A, tension is likely to be generated in the operating wire 73. As a result, when the vehicle collides with the guardrail 1A, the starting piece 72 can be smoothly displaced from the initial position P1 to the starting position P2, and the airbag device 4A (gas generator 50) can be operated quickly and accurately.

Further, in the guardrail 1A in the present embodiment, the support column 2 is arranged in the protection target area AR1 by joining the support column 2 to the protective inner surface 31 of the beam 3. According to such a joining mode of the beam 3 and the support column 2, when the airbag device 4A is operated, the airbag bag body 60 can be easily deployed to the protection target area AR1 from the accommodating portion 40 formed inside the support column 2. There is an advantage of becoming.

The guardrail 1A in the present embodiment uses the cylindrical wall 20 of the support column 2 that supports the beam 3 as an outer shell portion, but the present invention is not limited to this. For example, the outer shell case 41 according to the first embodiment may be attached to the outside of the support column 2, and the airbag bag body 60 may be deployed in the protection target area AR1 (sidewalk) when the vehicle collides with the guardrail 1A. ..

Further, in the above embodiment, the burst pressure of the closing member 513 that seals the gas discharge port 512 of the filling bottle 51 in the gas generator 50 is set to a value smaller than the filling pressure of the pressurized gas, and the vehicle or the like is a guardrail. In the initial state before the collision with the gas, the closing member 513 was directly supported by the starting piece 72 to suppress the cleavage of the closing member 513, but the present invention is not limited to this mode. For example, the initial position P1 in which the starting piece 72 of the operating mechanism 70 is arranged in the initial state may be separated from the closing member 513. In this case, in the initial state, the burst pressure of the closing member 513 is set to be larger than the filling pressure of the pressurized gas so that the closing member 513 is not cleaved by the filling pressure of the pressurized gas. In such an embodiment, when the vehicle or the like collides with the guardrail and the starting piece 72 is displaced from the initial position P1 to the starting position P2 by the tension transmitted via the operating wire 73, the displacement of the starting piece 72 It is preferable that the operating mechanism 70 separately has an opening mechanism for opening the closing member 513 in conjunction with the opening mechanism.

The opening mechanism as described above includes, for example, a detonator that houses the detonator inside and a firing pin (trigger) that is urged by a spring or the like so as to collide with the detonator, and opens the activation piece 72 in the initial state. It may be engaged with the firing pin of the mechanism to prevent the firing pin from colliding with the detonator against the urging force of the spring. For example, the detonator contained in the chamber of a detonator is an explosive that burns when pressure is applied.

In such an opening mechanism, the firing pin vigorously collides with the detonator due to the urging force of the spring, and the detonator of the detonator burns. Can be cleaved. Further, the opening mechanism may have a detonator chamber for accommodating a detonator different from the detonator detonator, and the detonator chamber and the detonator chamber may be communicated with each other by a detonator (flash hole). .. In this case, the flame or combustion gas generated by the combustion of the detonator in the detonator may be introduced into the explosive chamber through the ignition hole, and the explosive may be ignited by the thermal energy. Then, the closing member 513 may be cleaved by the thermal energy of the flame or the combustion gas generated by the combustion of the explosive.

In the above-mentioned opening mechanism, as long as the starting piece 72 is arranged at the initial position P1 in the initial state before the vehicle or the like collides with the guardrail, the firing pin is restricted from colliding with the detonator. As a result, the gas discharge port 512 of the filling bottle 51 is maintained in a state of being sealed by the closing member 513. On the other hand, when a vehicle or the like collides with the guardrail and the starting piece 72 is displaced from the initial position P1 to the starting position P2 by the operating wire 73, the engagement between the starting piece 72 and the firing pin is released. As a result, the firing pin vigorously collides with the detonator due to the urging force of the spring, so that the detonator of the detonator is ignited and the closing member 513 is cleaved. As a result, the gas discharge port 512 of the filling bottle 51 can be opened and the gas generator 50 can be operated.

Further, as another aspect of the opening mechanism, for example, when a vehicle or the like collides with a guardrail, a cleaving member formed of a rod member or an arrowhead member having a sharp tip is closed by using an urging force such as a spring. A mode may be adopted in which the closing member 513 is directly cleaved by the impact of the collision with the member 513. In this case, in the initial state before the vehicle or the like collides with the guardrail, for example, the stopper member configured as the starting portion is engaged with the cleaving member, and the cleaving member is fired toward the closing member 513. It may be regulated against the urging force of the spring. Further, the stopper member (starting portion) is connected to the first end portion 731 of the operating wire 73, and when a vehicle or the like collides with the guardrail, the stopper member (starting portion) is pulled by the operating wire 73 to open the stopper member (starting portion). It is displaced from the initial position P1 that engages with the member to the starting position P2 that releases the engaged state. With this as an opportunity, the cleaving member is fired toward the closing member 513 by the urging force of the spring, and the cleaving member vigorously collides with the closing member 513 to cleave the closing member 513 and exhaust the gas of the filling bottle 51. Exit 512 may be opened.

<Other Embodiments>
In the above-described embodiments and modifications, the case where the protective body according to the present disclosure is applied to a guardrail installed along a road has been described as an example, but the protective body may be applied to a protective body other than the guardrail. That is, the protective body according to the present disclosure can be applied to various fences, protective fences, etc. that are fixed to the ground and partition the space into a protected area and a non-protected area. Further, it goes without saying that the protected area and the non-protected area partitioned by the protective body are not limited to the sidewalk and the roadway. For example, the protective body may be a fence, a protective fence, or the like installed along the boundary between a work area where work is performed by a forklift or the like and a non-work area in a facility such as a factory or a warehouse.

15 and 16 are diagrams illustrating the protective body 1B according to another embodiment. FIG. 15 is a rear view of the protective body 1B, and FIG. 16 is a top view of the protective body 1B. The same configuration as the guardrail according to the above-described embodiment will be designated by the same reference numerals, and detailed description thereof will be omitted.

The protective body 1B has a protective partition member 3B extending along the boundary between the protected area AR1 and the non-protected area AR2, and a plurality of columns 2B supporting the protective partition member 3B. The protective partition member 3B includes a plurality of cross rail members 300 extending along the boundary between the protected area AR1 and the non-protected area AR2, and each cross rail member 300 moves up and down at regular intervals, for example. They are arranged side by side. Each cross rail member 300 has a protective inner surface 31 facing the protected area AR1 and a protective outer surface 32 facing the non-protected area AR2. The protective body 1B is, for example, a protective fence fixed to the floor surface (ground) in a facility such as a factory or a warehouse. Then, the protective body 1B is installed along the boundary position between the work area where the work by the forklift or the like is performed and the passage area where the employees or the like pass.

The protective body 1B includes an airbag device 4B, and an outer shell case 41 of the airbag device 4B is attached to a protective inner surface 31 of the protective partition member 3B. The internal structure of the outer shell case 41 is the same as the structure described with reference to FIGS. 3, 4 and the like in the first embodiment. Even in such a protective body 1B, when a colliding object collides with the protective body 1B, the collision energy of the colliding object is used to mechanically operate the gas generator housed in the outer shell case 41 to generate air. The bag body can be deployed in the protection target area AR1.

In the examples shown in FIGS. 15 and 16, the embodiment in which the outer shell case 41 is attached to the protective partition member 3B in the protective body 1B has been described as an example, but the present invention is not limited to this. For example, the protective partition member 3B in the protective body 1B may have a hollow structure, and an accommodating portion for accommodating the airbag bag body and the gas generator constituting the airbag device 4B may be formed inside the protective partition member 3B. Further, instead of disposing the outer shell case 41 on the protective partition member 3B of the protective body 1B, the outer shell case 41 may be arranged on the support column 2B.

Each aspect disclosed herein can be combined with any other feature disclosed herein.

1 ... Guardrail 2 ... Support 3 ... Beam 4 ... Airbag device 40 ... Storage 41 ... Outer shell case 50 ... Gas generator 51 ... Filling bottle 52 ...・・ Diffuser part 60 ・・・ Airbag bag body 70 ・・・ Actuating mechanism 71 ・・・ Support 72 ・・・ Starting piece 73 ・・・ Actuating wire 74 ・・・ Pulley 75 ・・・ Seal member 76 ・・·Fixture

Claims

A protective body that is fixed to the ground
With a gas generator
An airbag bag body that is deployed by the gas supplied from the gas generator when the gas generator is operated, and
The operating mechanism that operates the gas generator and
An outer shell portion accommodating the gas generator, the airbag bag body, and the operating mechanism,
With
The actuating mechanism includes an actuating unit that activates the gas generator when the gas generator is displaced from a predetermined initial position arranged in the initial state before the operation of the gas generator to a predetermined starting position.
One end side is connected to the fixing portion provided on the inner wall surface of the outer shell portion and the other end side is connected to the starting portion, and when the outer shell portion is deformed by an external force, the external force is activated from the fixing portion. A transmission member that displaces the starting part from the initial position to the starting position by transmitting to the part.
Has a protective body.
The transmission member is a wire rod or a strip material, and is
The actuating mechanism has a tensioner that exerts tension on the transmission member.
The tension exerted by the tensioner on the transmission member in the initial state is smaller than the operating tension acting on the transmission member when the starting portion is displaced from the initial position to the starting position.
The protective body according to claim 1.
The gas generator is a pressurized gas type gas generator having a filled bottle filled with pressurized gas and a closing member that closes a gas discharge port in the filled bottle.
The operating mechanism causes the closing member to be cleaved when the starting portion is displaced from the initial position to the starting position, thereby discharging pressurized gas from the gas discharge port.
The protective body according to claim 1 or 2.
The gas discharge port of the gas generator and the gas introduction port of the airbag bag body are connected by a flexible connecting pipe.
The protective body according to any one of claims 1 to 3.
The protective body is a protective body fixed to the ground in order to divide the space into a protected area and a non-protected area.
Includes a protective partition member extending along the boundary between the protected area and the non-protected area.
The outer shell portion is provided on the protective partition member.
The protective body according to any one of claims 1 to 4.
The arrangement position of the fixing portion and the initial position of the starting portion in the outer shell portion are set at different positions along the extending direction of the protective partition wall member, and the transmission member is the protective partition wall member. It is extended along the extension direction,
The protective body according to claim 5.
The protective body is a protective body fixed to the ground in order to divide the space into a protected area and a non-protected area.
Includes a protective partition member extending along the boundary between the protected area and the non-protected area, and a support column for supporting the protected partition member.
The outer shell portion is provided on the support column,
The protective body according to any one of claims 1 to 4.
The arrangement position of the fixing portion and the initial position of the starting portion in the outer shell portion are set at different positions along the height direction of the support column, and the transmission member is set in the height direction of the support column. It is extended along
The protective body according to claim 7.
The outer shell portion has a bag outlet for deploying the airbag bag body to the outside when the gas generator is operated, and a cover member for shielding the bag outlet.
When the gas generator is operated, the bag outlet is opened by the expansion pressure of the airbag bag body.
The protective body according to any one of claims 1 to 8.
The protective body according to any one of claims 1 to 9, wherein the protective body is a guardrail installed at a boundary position between a sidewalk and a roadway.
An airbag device in a protective body fixed to the ground.
With a gas generator
An airbag bag body that is deployed by the gas supplied from the gas generator when the gas generator is operated, and
The operating mechanism that operates the gas generator and
An outer shell portion provided on the protective body and accommodating the gas generator, the airbag bag body, and the operating mechanism.
With
The actuating mechanism includes an actuating unit that activates the gas generator when the gas generator is displaced from a predetermined initial position arranged in the initial state before the operation of the gas generator to a predetermined starting position.
One end side is connected to the fixing portion provided on the inner wall surface of the outer shell portion and the other end side is connected to the starting portion, and when the outer shell portion is deformed by an external force, the external force is activated from the fixing portion. A transmission member that displaces the starting part from the initial position to the starting position by transmitting to the part.
An airbag device in a protective body having.
A method of operating an airbag device in a protective body fixed to the ground.
As the airbag device
With a gas generator
An airbag bag body that is deployed by the gas supplied from the gas generator when the gas generator is operated, and
The operating mechanism that operates the gas generator and
An outer shell portion provided on the protective body and accommodating the gas generator, the airbag bag body, and the operating mechanism.
To prepare for
As the operating mechanism, a starting unit that operates the gas generator and a starting unit that operates the gas generator when the gas generator is displaced from a predetermined initial position arranged in the initial state before the operation to a predetermined starting position.
A transmission member whose one end side is connected to the fixing portion provided on the inner wall surface of the outer shell portion and whose other end side is connected to the activation portion.
To prepare for
When the outer shell portion is deformed by an external force, the external force is transmitted from the fixed portion to the starting portion via the transmitting member to displace the starting portion from the initial position to the starting position, and the starting portion is displaced. Including operating the gas generator,
How to operate the airbag device in the protective body.