JP2004249808A - Trigger generating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify a shielding/sound proofing device for vehicle cassation which can increase the safety of workers by reducing explosive sound when impact damping devices such as air bags are exploded and developed in the cassation of a vehicle. <P>SOLUTION: Start triggers sent to explosives installed in the plurality of air bags or pre-tensioners are generated at slightly shifted timings (for example, shifted 0.1 sec each). Thus, peak sound in the explosion and development can be lowered. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
INDUSTRIAL APPLICABILITY The present invention is used for disposal of an impact mitigation device including an airbag mounted on an automobile. The present invention relates to an electric device that is provided in a vehicle interior and generates a trigger current for deployment of an impact mitigation device that operates using explosives, and a method of treating a scrapped vehicle. As an impact mitigation device other than an airbag, there is a seat belt pretensioner and the like.
[0002]
[Prior art]
When a large instantaneous acceleration is applied to the body of the vehicle, such as when the vehicle collides with another object, the airbag is automatically deployed to install the airbag inside the vehicle interior, such as the driver and passengers. The technology for protecting the human body has become widespread. In addition, a pretensioner provided to instantly fix the seat belt at the position at that time when the airbag is deployed is also used. An impact mitigation device including such an airbag has a structure in which an explosive is mounted inside in order to deploy and operate in a very short time after an impact is detected. Then, an electric trigger is generated in accordance with the output of the acceleration sensor, the detonator is activated, the airbag is deployed by the explosive force of the explosive, or the pretensioner is activated.
[0003]
Most of the shock absorbing devices mounted on the vehicle do not operate or explode until the end of the life of the vehicle. When the vehicle life is over and the vehicle is scrapped, the airbag and other unused impact mitigation devices will be scrapped. In this disposal process, a procedure for safely executing the disposal in accordance with the regulations of the recycling laws and regulations is defined. At present, most workers are in the early stages of scrapping, where workers are temporarily evacuated to a safe place, and all of these explosives are ignited and activated by electric signals so that they will not be deployed due to inadvertent impacts etc. Is being treated.
[0004]
For this reason, an electric trigger device for use in scrapping has been conventionally known. This is because the wiring of the trigger signal line extending to the impact mitigation device of the vehicle body that performs the scrapping process is disconnected, and this is connected to the triggering device of the scrapping workshop, and when a predetermined operation is performed on the triggering device, the worker is evacuated. After several tens of seconds, the airbag or other device automatically explodes and deploys. As a conventional device for this purpose, there is a technique disclosed in Patent Document 1 (applicant, Keihin). In the airbag disposal process, the control program of the trigger signal generator is read in advance, and after confirming that the evacuation time is set, the explosion process is executed.
[0005]
[Patent Document 1]
JP-A-11-301389
[Problems to be solved by the invention]
Even if such a conventional device is used, a considerably large explosion sound is generated in the disposal of the airbag. One of the reasons is that recently produced vehicles are equipped with a plurality of airbags, and the plurality of airbags are simultaneously deployed according to a signal from a trigger device. That is, in recent vehicles, airbags are provided in a driver's seat and a passenger's seat in a living room, and a pretensioner using explosives is also used for instantly fixing a seat belt. If these unused explosives are ignited and exploded at the same time in scrapping, a loud explosion sound will be generated. In addition, if a plurality of airbags are deployed at the same time, the blast generated is large, so it is necessary to increase the evacuation distance of the worker, and the possibility of an accident increases. In a workplace where a loud explosion is generated, the cost of equipment for shielding and soundproofing is expensive.
[0007]
An object of the present invention is to improve this, and an object of the present invention is to reduce the airbag deployment noise generated during the disposal of an automobile. An object of the present invention is to improve the safety of scrap car disposal work. SUMMARY OF THE INVENTION An object of the present invention is to simplify a shielded soundproofing device for treating a scrapped vehicle.
[0008]
[Means for Solving the Problems]
The present invention provides a method for disposing airbags and other shock-absorbing devices mounted on one vehicle by explosion and deployment of shock-absorbing devices such as a plurality of airbags simultaneously by one trigger signal. The biggest feature is that the ignition and explosion are provided sequentially. That is, in order to appropriately perform the impact mitigation by the airbag or the like, when a large acceleration is detected due to a collision or the like, it is necessary that a plurality of devices operate in unison within a very short time. However, in the scrap car processing, it is not necessary to simultaneously deploy and operate the plurality of shock mitigation devices, and the plurality of shock mitigation devices can be sequentially operated and deployed. As a result, the generated explosion sounds are generated in a dispersed manner, and a large explosion sound is not generated at once. Also, the degree of risk is reduced.
[0009]
That is, a first aspect of the present invention is a trigger generator, which is a first delay circuit that generates an output signal after a lapse of time (t ₁ ) required for evacuation from startup, and that is activated by an output signal of the first delay circuit. And a second delay circuit for sequentially generating a trigger signal for deployment of the plurality of impact mitigation devices including the airbag with a time difference (t ₂ ). This device may be provided as an independent device for work (i), or (ii) designed and configured in this way, taking into account in advance that a trigger signal generation device mounted on a vehicle is used at the time of scrapping. It may be. With this configuration, no explosive sound is generated at the same time for a plurality of impact mitigation devices including the airbag, and the duration of the noise becomes longer but the maximum value of the noise becomes smaller. Since the maximum value is reduced, the range of disturbance caused by noise is reduced, and the equipment for protecting the noise can be simplified. Further, the risk to the worker is reduced.
[0010]
From the results of the test, it is appropriate to set the time difference (t ₂ ) to about 0.01 to 0.5 seconds. Although this depends on the nature of the explosive of the shock arrester to be processed, the duration of the explosion sound is generally very short. It is better to shorten it.
[0011]
A structure in which the first and second delay circuits are provided when the vehicle is shipped, and a signal input terminal for activating the first delay circuit is provided separately from a terminal for supplying an output of an acceleration sensor. It can be. As described above, this delay circuit is provided in the trigger generator from the beginning in consideration of the case of the scrapping process from the time of shipment of a new vehicle as described above. In such a vehicle-mounted device, a plurality of explosives are set to ignite and explode at the same time when the acceleration sensor senses when the vehicle is running and used. Is provided separately, and the first delay circuit and the second delay circuit are sequentially operated by applying a trigger input thereto.
[0012]
The first time (t ₁ ) relating to the first delay circuit is set to be extremely short, or the first time is substantially set to zero (t ₁ = 0), or instead of the first delay circuit. And means for remotely activating the second delay circuit. An example of the means for remotely activating is a wireless activating device using a long electric code, and another example is a radio activating device using radio waves or the like. With such a configuration, the operator can perform the starting operation from a sufficiently safe remote position. In this case, the first time (t ₁ ) may be very short, or substantially t ₁ = 0. This also apparatus of the present invention when, rather than a plurality of the shock absorbing device is simultaneously explosive deployment, the shock absorbing device explodes expand shifted by time t _2.
[0013]
A second aspect of the present invention is a method for treating a scrapped vehicle using the above-described device. That is, the operation of removing a wiring for supplying a trigger signal to a plurality of impact mitigation devices including an airbag provided in the vehicle from a vehicle-mounted device and replacing the wiring with an output terminal of the trigger signal generating device is included. Features. In this case, the trigger signal generating device is provided in a factory that performs scrap car processing, and is used by connecting to the wiring of the vehicle each time. By performing the processing in this manner, the present invention can be implemented for a vehicle in which the disposal of a waste vehicle is not considered in advance.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
(First embodiment)
FIG. 1 is a block diagram illustrating an electric circuit of the apparatus according to the embodiment of the present invention. The trigger generator 1 is mounted on a vehicle, and the output of a built-in G sensor 11 is given to a decision circuit 12 composed of an electronic circuit, and the decision output of the decision circuit 12 is given to a drive circuit 13. The determination circuit 12 and the drive circuit 13 are configured by a combination of a plurality of semiconductor switch circuits. The drive circuit 13 is provided with four pairs of trigger signal output terminals, each of which has an airbag 2 provided in a driver's seat, an airbag 3 provided in a passenger's seat, and left and right seat belt pretensioners 4 and 5. It is connected to the ignition end by wiring. A DC positive electrode of the vehicle power supply is connected to the terminal + B, and a DC negative electrode of the vehicle power supply is connected to the terminal E. The terminal M is connected to a monitor circuit (not shown) for monitoring the operation state of each part of the vehicle. The terminal S is an input terminal used only at the time of waste vehicle processing unique to the apparatus of the present invention. This will be explained in detail later.
[0015]
The power supply circuit 14 receives a vehicle power supply and supplies a necessary power supply current to each part of the trigger generator 1. A safety sensor 15 is interposed in a power supply circuit for supplying to the drive circuit 13, and the power supply to the drive circuit 13 is shut off except when the vehicle is in a predetermined traveling state, and the drive circuit 13 operates carelessly. It is configured to prevent that. Since this configuration is well known, a detailed description is omitted.
[0016]
That is, when the G sensor 11 detects an abnormal shock exceeding a predetermined value while the vehicle is running, the trigger generation device 1 sends a pulse signal to the drive circuit 13, and the drive circuit 13 responds immediately. Then, the ignition trigger current is supplied to the terminals A, B, C, and D all at once. As a result, the explosives of the airbags 2 and 3 and the pretensioner 4 are simultaneously ignited, locking the seat belt and simultaneously deploying the airbags.
[0017]
The feature of the present invention lies in that the terminal S and the time difference circuit 21 are provided. Nothing is connected to the terminal S when the vehicle leaves the vehicle. The terminal S is used for the first time when the vehicle is disposed of after the end of its useful life.
[0018]
FIG. 2 is an operation time chart of the time difference circuit 21. That is, when a predetermined voltage is supplied to the terminal S to which nothing is connected for a short period of time by a manual operation, the time difference circuit 21 starts from the time when the supply is stopped, and after a predetermined time t ₁ (eg, 30 seconds). short pulses a, B, C, continuously generates the time interval _{t 2} D. This short pulse A, B, C, D is supplied to the drive circuit 13, the airbag 2, 3, and the time interval _{t 2} to pretensioner 4 (e.g., 0.1 seconds) for sequentially supplying the ignition trigger current in . Thus, the airbags 2, 3, and the pretensioner 4 explode and deploy sequentially. At this time the terminal A, B, C, rather than all at once ignition current is supplied to the D, there is a greatest feature of the present invention where the sequential ignition current is supplied at time intervals of interval t _2.
[0019]
That is, the worker who performs the scrapping process connects the power supply terminal to the terminal S using an appropriate electric wire and supplies the start signal S. Then, immediately leave the vehicle and evacuate to a safe place. And after the time t _1, the airbag 2 and 3, further pretensioner 4 is an explosion deployed sequentially at time intervals t _2. The worker confirms the explosion by sound and returns to the position of the vehicle. Thus, the worker safety is secured, sound associated with the explosion deployment, such as a plurality of airbags rather than explode deployed at a time, the maximum value of the sound is because sequentially explosive expansion in the time interval t ₂ Become smaller.
[0020]
Further, the operation of sequentially supplying the ignition current to the plurality of terminals as described above can be configured to be continuously and repeatedly performed a plurality of times. This takes into account that the explosion and deployment may not be performed even if the ignition current is sent for some unexpected reason, and this configuration can enhance the safety of work.
[0021]
(Second embodiment)
FIG. 3 is a block diagram of the second embodiment of the present invention. In this example, the trigger generator 1 'of the embodiment of the present invention is a portable device. The trigger generator 1 'has a built-in circuit equivalent to the drive circuit 13 described in the first embodiment, and the drive circuit 13 is operated by a built-in battery B. By operating the push button S provided on the outer box, a trigger signal is sequentially transmitted to the output terminals A, B, C, and D.
[0022]
In order to use this device, the wiring of the airbags 2, 3 and the pretensioner 4 of the vehicle to be dismantled by the scrapping process is removed from the trigger generator provided in the vehicle, and this is removed from this portable trigger generator. Replace with device 1 '. Then, the operator operates the push button S and retreats to a safe place. Then, after a lapse of time t ₁ (eg, 30 seconds), a trigger current is sequentially supplied at time intervals t ₂ (eg, 0.1 seconds), and the airbag and the pretensioner of the vehicle being scrapped are sequentially exploded and deployed. You.
[0023]
As described above, even if the trigger generation device of the target processing vehicle is not designed in the form of the present invention, by using the device of the second embodiment, the airbag and other impact prevention devices can be similarly time-series. Can be exploded. In this device, as in the first embodiment, the ignition current can be repeatedly transmitted a plurality of times.
[0024]
(Third embodiment)
Next, an embodiment in which a program control circuit is provided in the drive circuit 13 will be described. This can be carried out both when the device is installed from the time of shipment of the new vehicle as in the device of the first embodiment and when it is provided in a scrap car processing work place as in the device of the second embodiment. That is, in the above description, the drive circuit 13 is described as being configured by a combination of a plurality of switch circuits, but this can be configured to be controlled by a program control circuit in which software is installed.
[0025]
FIG. 4 is a control flowchart of the program control circuit provided in the drive circuit 13. That is, the trigger S for starting the first delay circuit to the drive circuit 13 is inputted, the first delay time (t _1, Example 30 seconds) over time to. When this has elapsed, a trigger is sent to terminal A. Subsequently, when the second delay time (t ₂ , for example, 0.1 second) elapses, a trigger is sent to the terminal B. Further, a trigger is sequentially transmitted to the terminals C, D,... With a time difference of a _second delay time t2. Also in the third embodiment, the ignition current can be repeatedly transmitted a plurality of times.
[0026]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the deployment noise of the airbag which generate | occur | produces at the time of the scrapping of an automobile can be reduced. By employing the device having this configuration, it is possible to improve the safety of the scrap car disposal work and to simplify the shielded soundproofing device for scrap car disposal.
[Brief description of the drawings]
FIG. 1 is a block diagram of a first embodiment of the present invention.
FIG. 2 is a time chart for explaining the operation of the first embodiment of the present invention.
FIG. 3 is a block diagram of a device according to a second embodiment of the present invention.
FIG. 4 is a control flowchart of the third embodiment of the present invention (an embodiment utilizing a program control circuit).
[Explanation of symbols]
1 trigger generator 2 airbag (for driver's seat)
3 airbags (for passenger seat)
4 Pretensioner (for driver's seat)
5 Pretensioner (for passenger seat)
11 Acceleration sensor 12 Judgment circuit 13 Drive circuit 14 Power supply circuit 15 Safety sensor 21 Time difference circuit

Claims (5)

A first delay circuit for generating an output signal after a lapse of time (t ₁ ) required for evacuation from activation, and a plurality of impact mitigation devices including an airbag activated by the output signal of the first delay circuit for deployment. A second delay circuit for sequentially generating a trigger current with a time difference (t ₂ ). The time difference _{(t 2)} trigger generator according to claim 1, wherein from 0.01 to 0.5 seconds. The first and second delay circuits are provided when the vehicle is shipped, and a signal input terminal for activating the first delay circuit is provided separately from a terminal for supplying an output of an acceleration sensor. Item 3. The trigger generator according to Item 1. 2. The trigger generating apparatus according to claim 1, further comprising: means for remotely activating said second delay circuit instead of said first delay circuit. An output terminal of a trigger signal generator according to claim 1 or 4, wherein a wiring for supplying a trigger signal to a plurality of shock absorbing devices including an airbag provided in the vehicle is removed from a vehicle-mounted device. Disposal method of waste car including operation to change to.

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