JP4387890B2 - Chest injury prevention device at the time of railway driving impact accident - Google Patents

Description

  The present invention relates to a chest injury prevention device in a railway driving impact accident.

Accident prevention measures are an important issue for the safe operation of railways, and efforts by railway personnel are constantly being put into practice. On the other hand, it cannot be denied that there are accidents that are difficult to prevent completely at present, as seen in accidents caused by natural disasters and railroad crossing accidents. In view of the idea that measures should be taken to minimize damage in the event of an accident, investigation and research are currently underway at the time of a railway driving impact accident. As part of this, the present inventors have conducted damage surveys targeting commuter train collision accidents and have reported some characteristics regarding injured passengers (see Non- Patent Document 1 below).
Komino et al., “Survey on passenger damage during train impact”, Ergonomics, Vol. 33, no. 5, 271-279, 1997

  According to the said nonpatent literature 1, in the vehicle by which the long seat was installed in the vehicle, there exists an injury pattern that the passenger sitting on a seat injures a chest by the pipe type partition of a seat side. In order to prevent chest injury in the event of a railway driving shock, sufficient analysis of the injury situation and measures to prevent chest injury are necessary, but measures for such pipe-type partitions have been taken so far. There wasn't.

In view of the above situation, the present invention effectively prevents a chest injury at the time of a railway driving impact accident in which a pipe-type partition is provided on a long seat arranged along a traveling direction in a railway vehicle with a simple configuration. It aims at providing the chest injury prevention apparatus at the time of a railway driving shock accident.

In order to achieve the above object, the present invention provides
[1] A chest injury prevention device in the event of a railway driving impact accident , in which a chest injury prevention plate is attached to a pipe-type partition provided beside a long seat arranged along a traveling direction in a railway vehicle , wherein the chest injury The prevention plate is disposed on the long sheet side of the pipe-type partition, and includes an inner plate having a buffer member that absorbs an impact, and an outer plate fitted to the inner plate with the pipe-type partition interposed therebetween. It is characterized by comprising .

[ 2 ] In the apparatus for preventing chest injury at the time of a railway driving impact accident described in [ 1 ] above, a part of a horizontal pipe arranged at an elbow height of the pipe type partition can be used as a grip part. A through hole is provided in the inner plate and the outer plate.

ADVANTAGE OF THE INVENTION According to this invention, a passenger's chest injury by the pipe-type partition provided by the side of the long seat arrange | positioned along a advancing direction in a railway vehicle at the time of a railway driving impact accident can be prevented effectively.

  In particular, the present invention requires only a chest injury prevention plate to be installed in a pipe-type partition, so that it is very cheap and simple compared to the case where the entire partition is replaced.

In the chest injury prevention apparatus at the time of a railway driving impact accident, a chest injury prevention plate is attached to a pipe-type partition provided on the side of a long seat arranged in the traveling direction in a railway vehicle . Therefore, it is possible to effectively prevent a passenger's chest injury due to the pipe-type partition provided beside the long seat disposed along the traveling direction of the railway vehicle at the time of a railway driving impact accident.

  Hereinafter, embodiments of the present invention will be described in detail.

As described above, in a vehicle in which a long seat arranged in the traveling direction is installed in a railway vehicle, a passenger sitting on the seat has a chest part separated by a pipe-type partition on the side of the seat at the time of a railway driving impact accident. There is an injury pattern of injury. A railway operation impact accident is a railway train accident in a broad sense, including a train collision accident, which is a collision between a train and a train, as well as a railroad crossing accident where the train hits a truck that is stopped at a railroad crossing. Means.

  Therefore, in order to examine countermeasures against this, first, numerical analysis for estimating the injury situation is performed.

  The long seat is a seat of a type in which a plurality of passengers such as three seats and seven seats sit on the side of the vehicle and are installed in the longitudinal direction of the train. This long seat and the passenger sitting on it were modeled, and numerical analysis was performed on the movement of the passenger and the deformation of the chest due to contact with the partition when the acceleration when the train collided was applied to the floor. Here, two types of conditions were set for the partition type, impact acceleration, and number of seated persons considered to be related to the degree of injury, and the effects were examined. In addition, the finite element method (FEM) was used for the numerical analysis, and PAM-CRASH manufactured by France ESI was used as analysis software.

  The passenger model and long seat model used for the analysis are shown in FIG.

  The passenger model used was THUMS-AM50 jointly developed by Toyota Motor Corporation and Toyota Central Research Laboratory. THUMS-AM50 is a FEM model for collision analysis made on the basis of the average physique (height 175 cm, weight 77 kg) of American adult men in their 30s to 40s. This time, the left and right bar elements are additionally set on the 2nd to 11th ribs of this passenger model, and the displacement amount of the bar element when the passenger and the partition at the end of the seat contact at the time of collision is regarded as the displacement amount of the chest. It was calculated as a standard for evaluating the degree of injury.

  This passenger model is a model that does not use joint elements in the joints, and it is difficult to change the posture by bending the joint before the analysis is performed, so the standard posture for impact analysis of passengers in the driver's seat is applied mutatis mutandis. did.

  The analysis conditions are shown in Table 1. As conditions for the partition type at the sheet end, pipe type and plate type were set as representative ones.

  An input waveform set as the acceleration condition of the vehicle body is shown in FIG. Under the two acceleration conditions of acceleration 1 and acceleration 2, the vehicle speed difference ΔV before and after the collision is equivalent (ΔV = 5 m / s), and the magnitude and duration are different.

  The seating conditions were set at two levels, one and two, due to the limitations of computer capabilities. In the analysis, the time of the start of the collision is set to 0 seconds, and when the number of passengers is one, the calculation of the maximum amount of rib displacement is performed by calculating for 0.15 seconds from the start of the collision and 0.25 seconds for two passengers. A value is requested.

As a representative example of visualizing the simulation result, the result of Condition 3 in Table 1 is shown in FIG. Moreover, the maximum value of the chest displacement in each condition of Table 1 is shown in FIG.

  Focusing on the partition type, regardless of the conditions of impact acceleration and number of seated people, the maximum value of chest displacement of the plate type (conditions 5-8) is low, and 28% of the chest displacement of the pipe type (conditions 1-4) It can be seen that the value is 32%. From this result, it is considered that the difference in the shape of the partition type greatly affects the degree of injury.

  As for the acceleration condition, when the chest displacement at the acceleration 1 (conditions 1, 2, 5, 6) is used as a reference, the chest displacement at the acceleration 2 (conditions 3, 4, 7, 8) is 97% to 104%. there were. Therefore, it is unlikely that the difference in acceleration conditions this time will affect the degree of injury.

  Looking at the effect of the number of seated passengers, the chest displacement of passengers sitting beside the partition is the case of two passengers (conditions 2, 4, 6, 8) and the case of one passenger (conditions 1, 3, 5, 7). ) Shows a value of 128% to 142% of the chest displacement, and the number of seated persons is considered to affect the degree of injury.

  Based on the above results, a means for effectively preventing chest injury at the time of a railway driving impact accident with a simple configuration will be described.

  From the above, it has been clarified that, in a vehicle in which a long seat is installed in the vehicle, the maximum chest displacement is smaller when the partition on the side of the seat is a plate type than when the partition is a pipe type.

  Therefore, in the present invention, a seat employing a conventional pipe-type partition can be changed to a plate-type partition seat with a simple configuration.

  FIG. 5 is a configuration diagram of a chest injury prevention device in a railway driving impact accident in which a plate is attached to a pipe-type partition provided beside a long seat according to an embodiment of the present invention, and FIG. Fig. 5 (b) is a schematic diagram of a chest injury prevention plate provided on the side of the seat, Fig. 5 (c) is a diagram showing how to attach the chest injury prevention plate to the pipe type partition. It is a figure explaining.

  In this figure, 1 is a long seat, 2 is a pipe-type partition provided on the side of the long seat 1, 3 is a lateral pipe at the bottom thereof, 4 is a lateral pipe placed at the elbow, 5 is A pipe arranged in the vertical direction to connect the pipes 3 and 4, 6 is a chest injury prevention plate attached to the pipe-type partition 2, and an inner plate 7 disposed on the long seat 1 side and a passenger and pipe-type partition 2, the chest injury prevention plate 6 is fitted on the outer plate 8 with the pipe-type partition 2 as the center. It has become. That is, the convex portion 7A of the inner plate 7 is fitted into the concave portion 8A of the outer plate 8, and the concave portions corresponding to the diameters of the respective pipes are provided at positions corresponding to the vertical pipe 5 and the horizontal pipes 3 and 4. Form.

  As described above, the inner plate 7 is disposed on the surface of the pipe-type partition 2 provided on the side of the conventional long seat 1 in contact with the passenger, so that the passenger can get on the end of the long seat 1 at the time of a railway driving impact accident. Injury to the passenger's chest can be prevented. In addition, the outer plate 8 is arranged so that the appearance is excellent. In addition, by making the inner plate 7 and the outer plate 8 decorative panels that heal the eyes of the passengers, the pipe-type partition 2 that has a rather cold mechanical feeling can be given a relaxed atmosphere.

  FIG. 6 is a block diagram of a chest injury prevention apparatus showing a modification of FIG. 5. In this example, a shock absorbing member (for example, a urethane material, a rubber plate, etc.) that absorbs an impact on the seat side of the inner plate 7 that receives the most impact. ) Stick 7B.

  By comprising in this way, the passenger | crew's chest injury at the time of a railroad driving impact accident can be prevented further effectively, and safety can be increased.

  FIG. 7 is a configuration diagram of a chest injury prevention apparatus in a railroad driving impact accident in which a plate is attached to a pipe-type partition provided beside a long seat according to another embodiment of the present invention.

  In this embodiment, a hole 9 is provided in a portion corresponding to a lateral pipe 4 arranged at an elbow portion of a pipe-type partition 2 provided on the side of the long sheet 1 of the chest injury prevention plate 6, and a passenger can use this hole. 9, the lateral pipe 4 arranged at the elbow portion can be grasped. Thereby, even a handicapped person or an elderly person can be grasped by the pipe 4 and can stand up easily.

  In addition, this invention is not limited to the said Example, Based on the meaning of this invention, a various deformation | transformation is possible and these are not excluded from the scope of the present invention.

  The chest injury prevention device at the time of a railway driving impact accident according to the present invention is suitable for a railway vehicle that can contribute to passenger safety at the time of a train collision accident.

It is a figure which shows the passenger model and long seat model which were used for the analysis. It is a figure which shows the input waveform set as an acceleration condition of a vehicle body. It is a figure which shows the result of the conditions 3 in Table 1 as a typical example which visualized the simulation result. It is a figure which shows the maximum value of the chest displacement in each condition of Table 1. It is a block diagram of the chest injury prevention apparatus at the time of a railway driving | operation impact accident which attaches a board to the pipe-type partition provided beside the long seat which shows the Example of this invention. It is a block diagram of the chest injury prevention apparatus which shows the modification of FIG. It is a block diagram of the chest injury prevention apparatus at the time of the railway driving | operation impact accident which attaches a board to the pipe type partition of the side of the long seat which shows the other Example of this invention.

DESCRIPTION OF SYMBOLS 1 Long seat 2 Pipe-type partition provided by the side of a long seat 3 Lower horizontal pipe 4 Horizontal pipe arrange | positioned in the elbow part 5 Vertically arranged pipe 6 Chest injury prevention board 7 Inside Plate 7A Convex 7B Buffer member 8 Outer plate 8A Concave 9 Hole

Claims (2)

A chest injury prevention device during railway operation shock accident Ru attaching the chest injury prevention plate to the partition of the pipe type provided beside the long sheet disposed along the traveling direction of the railway vehicle, preventing the chest injury The plate is disposed on the long sheet side of the pipe type partition, and includes an inner plate having a shock absorbing member that absorbs an impact, and an outer plate fitted to the inner plate with the pipe type partition interposed therebetween. A chest injury prevention device in the event of a railway driving impact accident. 2. The chest injury prevention device at the time of a railway driving impact accident according to claim 1 , wherein the inner plate is used so that a part of a lateral pipe arranged at an elbow height of the pipe type partition can be used as a grip part. And a chest injury prevention device in the event of a railway driving impact accident, wherein a through hole is provided in the outer plate.