JPH0243662B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to energy absorbing devices. Most of the conventional energy absorbing devices are mechanical, and therefore, despite their large structures, the damping force against impact force and restoring force is small. In order to eliminate the above-mentioned drawbacks, this invention utilizes the specificity of the flow viscosity of various fluids to reduce the impact force and the repulsive force of the spring.
The object of the present invention is to provide a so-called soft and strong energy absorbing device that is attenuated by two sets of buffers at the same time. Next, an example of the implementation of the energy absorbing device of the present invention will be explained based on the drawings.
FIG. First, in Figure 1, left and right 1
Coil springs 3 are arranged in parallel around each of the pair of airtight corrugated bellows 4, and both ends of each coil spring 3 are further fixed by a fixing plate 7.
Each of the fixing plates 7 on the side where each corrugated bellows contacts the inner surface of the container 8 is fixed to the container 8 and penetrates a part of each corrugated bellows 4. Both ends of one pipe 6 connected to the communication hole 11 provided in the above are inserted through the fixing plate 7 and the container 8, and gas and liquid are contained inside both the corrugated bellows 4 and the pipe 6. etc. fluid is enclosed. Furthermore, between both fixing plates 7 on the side not in contact with the inner surface of the container 8,
One end of the buffer conductor 1 is inserted, and the portion of the distal end of the buffer conductor 1 that comes into contact with both fixing plates 7 protrudes, and the buffer conductor 1 is fixed to another object at its intermediate portion. It is rotatable freely by a supporting shaft 2, and the other end is connected to an object to be cushioned. Next, FIG. 2 shows a configuration in which the corrugated bellows 4 explained in FIG. 1 is replaced with a cylindrical bellows 5.

Next, Figures 3 and 4 show the method of paralleling the coil spring 3 and the airtight corrugated bellows 4 explained in Figure 1, in which the waveform bellows 4 are a pair on the left and right, and one coil spring 3 is arranged in parallel in the center. Moreover, the structure of the shock absorbing conductor 1 does not rotate around the support shaft 2, but moves parallel to the shock absorbing direction, and the two belts 9 are shown in FIGS. 3 and 4. , a part of the box-shaped shock absorbing device 1 and a container 8 located on the opposite side thereof.
A pair of left and right belt retainers 1 fixed to the outer surface of the
2, the predetermined object and the cushioned object are connected, but in the middle of the two belts 9, each of the two belts 9 is bent at two places and joined with a fixing fitting 10 to be moored. The length of the belt 9 between the respective mooring portions is made slack so that the buffer conductor 1 can move sufficiently.

The reason why each of the belts 9 is loosened in the middle and held by a part of the shock absorbing device 1 and the belt holder 12 is to prevent the belt 9 from detaching if a part of the mooring part of each belt 9 is damaged. As a safety measure, other belt connection methods include mooring separate, discontinuous belts 9 to the buffer conductor 1 and the belt holder 12, or removing the belt holder 12 to connect the container. 8 may be directly fixed to a predetermined object. Furthermore, the coil spring 3 illustrated in FIG.
Other springs may be used, or a combination of a bellows and a spring may be used. To explain the operation, when an impact force is applied to the upper end of the shock absorbing device 1 in Figs. 1 and 2, the protruding portion tilts around the central support shaft 2, so that one side resists the coil springs 3 on both sides. The corrugated bellows 4 or cylindrical bellows 5 contracts, the other corrugated bellows 4 or cylindrical bellows 5 expands, and the fluid such as gas or liquid sealed inside flows through the pipe 6 connected to it. The flow velocity is suppressed by the cross-sectional area of the flow hole 11 and the pipe 6, and the viscosity of the fluid. Therefore, the impact force applied to the shock absorbing device 1 is attenuated and the object to be buffered moves, and then the elasticity of the coil spring is reduced. When the magnitude of the impact force exceeds the magnitude of the impact force, the coil spring 3 rebounds and restores the corrugated bellows 4 or the cylindrical bellows 5, but the speed of restoration is also suppressed by the fluid velocity as in the case of impact, and As a result, the shock absorbing conductor 1 moves flexibly. Furthermore, in the case of Figures 1 and 2, it is possible to buffer on both sides of the buffer conductor 1, but in the case of Figure 3,
In the case of FIG. 4, it is used on the belt 9 to cope with one-sided impact force, and is installed at the end of the belt 9 or in the middle of the belt 9 so as to be able to buffer it. As configured as above, the energy absorbing device of the present invention is small, powerful, and can absorb energy in a soft manner, so it can be used in a variety of ways, particularly as an energy absorbing device for seat belts in vehicle seats,
In addition, it can be used as an energy absorbing device for seats equipped with shoulder belts.

[Brief explanation of the drawing]

1, 2, and 4 are cross-sectional explanatory views of the energy absorbing device of the present invention, and FIG. 3 is a side view of FIG. 4. 1... Buffer conductor, 2... Support shaft, 3... Coil spring, 4... Wave shaped bellows, 5... Cylindrical bellows, 6...
Pipe, 7... Fixing plate, 8... Container, 9... Belt, 10... Fixing fittings, 11... Distribution hole, 12...
...Belt retainer.

Claims (1)

[Claims] 1. It has two buffers in which a spring and an airtight bellows having a flow hole 11 are arranged in parallel, and the flow holes 11 of both bellows are connected in a ring shape with a pipe 6 to seal fluid, and An energy absorbing device characterized in that a connecting surface of a pipe 6 is fixed to the inner surface of a container 8, and one end of a buffer conductor 1 is inserted between the other ends of the bellows.