JPS6049144A - Shock absorbing structure of honeycomb construction - Google Patents

Abstract

PURPOSE:To both prevent flection of a shock absorbing structure and limit damage of a honeycomb block to a local part so as to easily perform its replacement, by laminating a plural number of the honeycomb blocks respectively with different buckling resistance successively by the order of buckling resistance so as to provide the precedence for buckling when a shock is applied. CONSTITUTION:A honeycomb block is constituted by adhesively attaching the aggregate of a unit honeycomb 2 made of metal, paper, etc. between an upper plate 1a and a bottom plate 1b. Then a shock absorbing structure is constituted by laminating a plural number of the honeycomb blocks respectively with different buckling resistance by the order of buckling resistance. For instance, when the honeycomb of equal kind is used, a pressure receiving area is increased in every honeycomb block A-C, causing the buckling to be started from the block A of minimum area because a buckling load is in proportion to the pressure receiving area. In this way, the honeycomb block, imparting the precedence for its buckling caused by a shock, is easily replaced by both preventing flection of the shock absorbing structure by the shock and limiting damage of the honeycomb block to a local part when a light shock is applied.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shock absorber with a honeycomb structure, and more particularly, to an improvement of a shock absorber with a honeycomb structure in which a plurality of honeycomb blocks made of an aggregate of a large number of single honeycombs are laminated. .

Recently, shock absorbers having a honeycomb structure have come to be used as shock absorbing members for various purposes.

And°ζThis honeycomb structure shock absorber generally has
A structure in which multiple layers of honeycomb blocks, each consisting of an aggregate of a large number of insect honeycombs, are laminated is used.

However, conventional honeycomb structure shock absorbers have a structure in which a plurality of honeycomb blocks having the same buckling resistance are laminated.

Therefore, when a shock is applied to a shock absorber, it is unclear which layer of honeycomb block buckles first and how the buckling progresses, and sometimes the buckling progresses against the impact surface. In some cases, the absorber became unbalanced, causing the absorber to bend and lose its ability to absorb shock. Furthermore, when a relatively small impact is applied, the Honeycomb Block only partially buckles, but at that time, the stacked honeycomb blocks buckle randomly, one at a time, and eventually every block partially buckles. Currently, there are many problems, such as the uneconomical need to replace all blocks due to damage.

The present invention was developed as a result of an investigation i=1 in order to improve the drawbacks of the conventional shock absorber having a honeycomb structure as described above.

Therefore, an object of the present invention is to provide ordering of buckling during impact by laminating /'% Nikum absorbers having different buckling resistance in the order of buckling resistance, and to prevent bending of the absorber due to impact. To provide a shock absorber having a honeycomb structure, which prevents breakage of the honeycomb block at the time of a light impact and localizes the damage, and facilitates replacement of the honeycomb block.

That is, the gist of the present invention is a shock absorber having a honeycomb structure, which is characterized in that a plurality of honeycomb blocks each having a different buckling resistance are laminated in the order of the buckling resistance.

Hereinafter, the present invention will be specifically described by way of examples with reference to the drawings.

FIG. 1 is a perspective view of a honeycomb block, in which an aggregate of unit honeycombs 2 is fixed with adhesive between an upper plate 1a and a lower plate 1b. As the material of the honeycomb, metals such as aluminum, copper, and brass, and celluloses such as paper, synthetic paper, and cardboard can be used, but aluminum is preferable from the viewpoint of strength.

Figure 2 is a diagram showing the progress of buckling of a honeycomb. When a uniform force F is applied perpendicularly to the impact surface of the honeycomb, the buckling portion 4
indicates that it starts from the receiving side.

FIG. 3 is a diagram showing the relationship between the buckling process and the buckling drag force f when pressure is applied to the honeycomb block, and shows that the initial drag force is about twice as strong as the average drag force fm.

The following methods can be used to reduce the initial drag of the honeycomb block.

(1) Weakening the buckling resistance of the unit honeycomb. Naturally, if you use a weaker honeycomb, the drag will be smaller.

(2) A honeycomb block consisting of unit honeycombs with the same buckling resistance but with a small pressure-receiving surface, that is, a honeycomb block with a small area is used.

(3) Although the unit honeycombs have the same buckling resistance and the block sizes are the same, -a on the pressure-receiving surface side of the honeycomb
1; By crushing the honeycomb and subjecting it to so-called precrush processing, the pressure-receiving area of the honeycomb is reduced.

FIG. 4 shows three honeycomb blocks a, b, and c that have been subjected to pre-crush processing. 5 is a brick crush part, where a has the largest number, and b and c decrease in order.

FIG. 5 shows the honeycomb blocks a and b of FIG. 4.

This is a diagram showing the relationship between the buckling process and the buckling resistance when honeycomb blocks C are stacked in this order and processed from the a side.The initial resistance of the honeycomb block a is not much different from the average resistance fm, and the initial resistance of the honeycomb block b is The initial drag of C is 1.5 times fm and twice that of fm.

Therefore, in such a laminate, buckling progresses in the order of honeycomb blocks a and c, and this aspect constitutes an embodiment of the present invention.

FIG. 6 is a perspective view of an example of a shock absorbing device made up of three-stage joints of three-layer honeycomb blocks. A.

Blocks B and C are connected by passing bolts through holes provided on the outer periphery of the face plates at both ends. ■.

B is the top plate. r) is a flat plate for joining single honeycombs, 2 is a honeycomb, and 3 is a fixing base. In addition, a pressure face plate and a face plate guide device are provided on the pressure side as necessary, and a face plate 1 of AB I:I ts is taken out.

FIG. 7 is a side view of the device shown in FIG. 6 - ζ, showing the same type and size. If wandering attack energy E1
is applied in the direction of the arrow, this is to show that buckling occurs randomly, and 4 is a honeycomb in which buckling occurs.

Figure 8 shows that buckling of a single honeycomb occurs randomly.
This shows the initial state in which the balance between each block is lost and bending occurs, and the shock absorption performance decreases rapidly.

Figures 9 to I1 show the configuration of a honeycomb-structured shock absorber that is intended to buckle in the intended order in the present invention, and Figure 9 shows when the same type of honeycomb is used,
A buckling load is an example of a configuration in which the pressure receiving area is increased stepwise for each block in proportion to the pressure receiving area.
Buckling starts from the smallest area A block.

Figure 10 shows a case in which each block has the same area, the density of the unit honeycomb is different from among many types of honeycomb, and the buckling strength is selected in stages. It is the same as the one shown in the figure.

FIG. 11 and FIG. 12 show an example of the case where brick lashing is applied and the details of the brick lashing, and the 41J result is as explained in FIG. 4 and FIG. 5.

As shown in 5 of Figure 12, the Briklasoj-
A circular dish-shaped dent is uniformly applied to the pressure receiving surface, and the size of each dent is arbitrary, but the total surface finish must be changed in stages. 1 is a surface plate, 2 is a honeycomb, and 7 is an adhesive.

Figure 11 shows an example of the structure of a honeycomb structure shock absorber.
Since each block is a honeycomb of the same type and is arranged in descending order of initial strength, the blocks buckle sequentially starting with block A.

] - As mentioned above, the honeycomb structure shock absorber of the present invention is made by laminating a plurality of honeycomb blocks each having a different buckling resistance in order of the buckling resistance, and the buckling resistance is As means for differentiating the pressure, honeycomb blocks with different pressure-receiving areas, blocks with different honeycomb densities, or honeycomb blocks with different degrees of pre-cleaning and polishing are used. It is possible to adopt one stage and produce the following effects. That is, (11) Honeycomb against impact (Since the strength of the cock is arranged in stages, random seats will not occur and the absorber will not bend.

(2) Depending on the stacking arrangement of the honeycomb blocks, buckling occurs sequentially from the impact side or from the fixed side, so when repairing after a mild impact, replace the block. Keep it to a minimum and be economical.

The honeycomb-structured shock absorber according to the present invention described above is most suitable as a safety device for stopping overrunning of a vehicle at the end of a railway track or at a stopping point of a general vehicle.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a honeycomb block, Figure 2 is an explanatory diagram of the buckling process of a honeycomb block, Figure 3 is a diagram showing the relationship between the buckling process of a honeycomb block and buckling resistance, and Figure 4 is a pre-crash diagram. A plan view of the processed honeycomb block, Fig. 5 is a diagram showing the relationship between the buckling process and buckling resistance of the honeycomb block laminate subjected to the brick crush processing, Fig. 6 is a perspective view of the standby shock absorber, and Fig. 7 8 is a side view of the shock absorber showing random buckling, FIG. 8 is a side view of the shock absorber showing bending, FIGS. 9 to 12 show examples of the present invention, and FIG. Side views of σj impact absorbers with different impact areas, Figure 1 () is a side view of impact absorbers with honeycomb structures having different strengths, Figure 11 is a honeycomb block with brick-crushed processing. Side view of IIi impact absorber with honeycomb structure, No. 1.211 is an enlarged view of the brick crush part I
It is a side view. l...Surface plate, 2...Honeycomb flock\4...Buckling part, 5...Pre-crush part. Agent Patent Attorney Koyoshin - Patent Attorney Noiji] Kidisho Patent Attorney Sai1 Kazuhiko

Claims (1)

[Claims] A shock absorber having a honeycomb structure, characterized in that a plurality of honeycomb blocks each having a different buckling resistance are laminated in the order of the buckling resistance.