JPH07233832A - Shock absorbing member for collision test - Google Patents

Abstract

PURPOSE:To secure the desired shock absorbing performance and prevent the breakage, exfoliation, disassembly, slip-off, etc., during transport, shift, and acceleration due to collision, by preventing the stripping, exfoliation, tilt partial drop, slip-off, etc., even in case of the collision in a one-sided contact state and uniformly receiving the applied impact load, through relaxation, absorption, and softening. CONSTITUTION:A shock absorbing member has the front and rear two-layer structure in attached state, and a front layer A consists of a honeycomb panel 4 which is formed by attaching surface members 2 and 3 on both the surfaces of a honeycomb core 1, and a rear layer B has a honeycomb core 7 which has a nearly triangular wave shaped unevenness 6 on the front side. As the front layer A, is adopted the honeycomb panel 4 in an integral single body structure, or at least three top parts 8 of the unevenness 6 of the rear layer B are connected for each honeycomb panel 4 of the divided front layer A, or a cover member which integrally fix the front layer A and the rear layer B is adopted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorber for a crash test. That is, for example, it relates to a shock absorber used in a side impact test on an automobile and attached to the front surface of a test block on the assumption of the impact vehicle side.

[0002]

2. Description of the Related Art A collision test for a door or the like on the side of an automobile has become an important theme for promoting research on vehicle and occupant safety and protection measures. By the way, in a collision test for such a collided vehicle, a urethane foam or a honeycomb core has conventionally been used as a shock absorber attached to the front surface of the moving barrier having the characteristics assuming the colliding vehicle, that is, the test block. It is used. The honeycomb core as the shock absorbing material is generally made of aluminum, but it has excellent shock absorbing performance and is capable of uniform shock absorption, and a predetermined uniform shock load is applied to the side of the collided vehicle. In addition to being possible, it is lightweight, has low elasticity, does not bounce, and does not require maintenance, and so on.

FIG. 5 shows a conventional example of a shock absorbing material for a collision test using such a honeycomb core. (1) is a plan view, (2) and (3) are used states, respectively. It is a plane explanatory view of the main part of. This kind of shock absorbing material is particularly required to have shock absorbing performance at the initial stage of collision and shock absorbing performance after the middle stage. Therefore, as shown in FIG. As the front layer A, a honeycomb panel 4 in which face materials 2 and 3 are adhered to both surfaces of a honeycomb core 1 with the cell axis direction facing forward and backward is used. In addition, the honeycomb core 7 is divided into parts and the like, and as the rear layer B, similarly, the cell axis direction is directed forward and backward, and the honeycomb core 7 having the substantially triangular wave-shaped irregularities 6 formed on the front side is used. Then, for each face material 3 on the rear side of each honeycomb panel 4 obtained by dividing the front layer A into three parts, the tops 8 of the substantially triangular wave-shaped irregularities 6 of the honeycomb core 7 forming the rear layer B are 2 They were adhered to each other with the adhesive 9. In the figure, 10 is a contact plate, and this contact plate 10 is bonded to the rear side of the honeycomb core 7 of the rear layer B with an adhesive 9.

[0004]

By the way, the following problems have been pointed out in such a conventional example. First,
As shown in FIG. 5B, such a shock absorber for a collision test is made to collide with the door C or the like on the side surface of the collided vehicle from the front side, that is, the front layer A side. Then, due to the impact load at that time, the honeycomb core 1 of the honeycomb panel 4 of the front layer A is appropriately buckled, and the honeycomb core 7 of the rear layer B is also buckled.
However, by gradually buckling from the top 8 side of the unevenness 6, the applied impact load is uniformly alleviated, absorbed and buffered,
Therefore, I was supposed to take it evenly and completely.

By the way, in general, a protrusion such as a handle D is often present on the door C and the like. Then, such a protrusion of the handle D or the like causes a collision in a so-called one-side contact state, and a local impact load is applied to the impact absorbing material,
This causes a problem in impact absorption, which is a problem. That is, first, when the shock absorbing material collides with the door or the like on the side surface of the collided vehicle in a so-called full-face contact state, desired shock absorbing performance can be obtained without any problem. On the other hand, if there is a protrusion such as the handle D on the door of the vehicle to be collided and the impact absorbing material collides in a one-sided state, it receives a local impact load. The honeycomb panel 4 of the front layer A is divided into, for example, three parts as described above, and each of the divided parts is adhered to the two tops 8 of the unevenness of the rear layer B, and two points are provided near each center. It is only supported. Therefore, it often becomes difficult for the shock absorbing material to withstand the local shock load applied by the protrusion such as the handle D. In particular, when the partition 5 between the honeycomb panels 4 of the front layer A faces and collides with a protrusion such as the handle D, the adhesive 9 between the front layer A and the rear layer B is caused by a local impact load. Peeling off, front layer A
Between the rear layer B and the rear layer B, the rear layer B of the honeycomb panel 4 of the front layer A
Inclination to the side, partial depression, dropout, etc. will occur. Therefore, due to these factors, the conventional shock absorbers do not uniformly absorb, absorb, and buffer the applied impact load, and it becomes impossible to uniformly receive the impact load, resulting in the expected impact. It has been pointed out that the absorption performance cannot be obtained.

In view of such circumstances, the present invention has been made to solve the above-mentioned problems of the conventional example. In claim 1, an integral single honeycomb panel is used as the front layer. Thus, in the second aspect, three or more apex portions of the unevenness of the honeycomb core of the rear layer are bonded to each of the divided honeycomb panels of the front layer.
Then, by adopting the cover material that integrally fixes the front layer and the rear layer, firstly, even in the case of collision in a one-sided state, the impact load can be uniformly alleviated, absorbed, and buffered. Secondly, it is possible to obtain the shock absorption performance of, and secondly, damage, peeling, disassembly, during transportation, during movement or during acceleration due to collision,
The purpose of the present invention is to propose a shock absorbing material for a collision test, which can prevent falling and the like.

[0007]

The technical means of the present invention for achieving this object are as follows. First, claim 1
About: That is, the impact absorbing material for the collision test has a front and rear two-layer structure. And the front layer is
It is composed of a honeycomb panel which is an integral unit in which face materials are adhered to both surfaces of a honeycomb core whose cell axial direction faces forward and backward. The rear layer is provided with a honeycomb core in which the cell axis direction is directed forward and backward and substantially triangular wave-shaped irregularities are formed on the front side. Then, on the rear surface material of the honeycomb panel of the front layer,
The tops of the irregularities of the honeycomb core of the rear layer are adhered.

Next, claim 2 is as follows. That is, the impact absorbing material for the collision test has a front and rear two-layer structure. The front layer is composed of a plurality of honeycomb panels in which face materials are bonded to both surfaces of a honeycomb core with the cell axis direction facing forward and backward. The rear layer includes a honeycomb core in which the cell axis direction is directed forward and backward and substantially triangular wave-shaped irregularities are formed on the front side. Then, for each face material on the rear side of each of the divided honeycomb panels of the front layer, three or more tops of the unevenness of the honeycomb core of the rear layer are bonded.

Further, the third aspect is as follows. That is, the impact absorbing material for the collision test has a front and rear two-layer structure. The front layer is composed of a honeycomb panel in which a face material is bonded to at least the rear side of the honeycomb core with the cell axis direction facing forward and backward. The rear layer is provided with a honeycomb core in which the cell axis direction is directed forward and backward and substantially triangular wave-shaped irregularities are formed on the front side. Then, the top surface of the unevenness of the honeycomb core of the rear layer is adhered to the rear surface material of the honeycomb panel of the front layer, and the honeycomb panel of the front layer and the honeycomb core of the rear layer are integrally formed. A bent plate-shaped cover material is attached to be fixed to.

[0010]

Since the present invention comprises such means, it operates as follows. The impact absorbing material for this collision test, the front layer is composed of a honeycomb panel, the rear layer is provided with a honeycomb core in which the substantially triangular wave-shaped irregularities are formed on the front side, and the front layer and the rear layer are at the tops of the irregularities. It is composed of two layers of front and rear bonded. Then, in the collision test, it is attached to the front surface of the test block and collides with, for example, a door on the side surface of the collision target vehicle. Then, due to the impact load at the time of collision, the honeycomb core of the honeycomb panel of the front layer is appropriately buckled, and the honeycomb core of the rear layer is gradually buckled from each top side of the unevenness, thereby reducing the impact load. Relax, absorb, buffer.

By the way, in the shock absorbing material of the first aspect, the honeycomb panel of the front layer is made of a single unit.
Further, in the impact absorbing material according to claim 2, although the honeycomb panel of the front layer is divided, three or more peaks of the unevenness of the honeycomb core of the rear layer are adhered to each other, and the front layer is rear. Strongly supported by three or more fulcrums in the layer. Furthermore,
In the impact absorbing material of the third aspect, the honeycomb panel of the front layer and the honeycomb core of the rear layer are integrally fixed by a bent plate-shaped cover material.

Now, there is provided such claims 1, 2, 3
First of all, in the impact absorbing material of No. 1, even if a protrusion such as a handle existing on the side door of the collided vehicle collides in a one-sided state and receives a local impact load, Partial buckling, etc. of the honeycomb core of the honeycomb panel can sufficiently cope with such a local impact load, and the adhesive between the front layer and the rear layer can be peeled or peeled, the front layer can be inclined, Depression and falling are surely prevented. Therefore, the shock absorbing material according to claims 1, 2 and 3 uniformly absorbs, absorbs and buffers the shock load,
It can be received evenly over the entire surface, and the desired shock absorption performance can be reliably obtained. Secondly, it is possible to prevent the front layer and the rear layer of the shock absorbing material from being damaged, peeled off, decomposed, dropped off, etc. during transportation, movement, or acceleration for collision. In particular, in claim 3, These are very reliably prevented.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in the drawings. FIG. 1 shows a first embodiment of the present invention, (1) is a plan view, (2) is an enlarged view of the main part thereof,
(3) The figure is a perspective view of an example of the honeycomb core 7 of the rear layer B,
(4) FIG. 4 is a perspective view of another example of the honeycomb core 7 of the rear layer B. FIG. 2 shows a second embodiment of the present invention. (1) is a plan view, (2) is an enlarged view of the main part, and (3) is an exploded perspective view of the honeycomb core 7 of the subsequent layer B. is there. FIG. 3 shows the use state of these, (1) is a schematic perspective view in a state of standing upright, (2) is a side explanatory view, (3) is a honeycomb core 7 of the rear layer B at the initial stage of collision. Plan explanatory view of the main part,
(4) is a plan explanatory view of the main part of the same honeycomb core 7 in the latter stage of the collision, and (5) is a graph of the buffer capacity test of the same honeycomb core 7. FIG. 4 shows a third embodiment of the present invention,
(1) is a side view, (2) is a side view of the cover material 11, and (3) is an exploded perspective view of a main part.

The impact absorbing material for the collision test is the front layer A.
And the rear layer B has a two-layer structure before and after. First, referring to the first embodiment of FIG. 1, in the impact absorbing material of the first embodiment, the front layer A has face materials 2 and 3 bonded to both surfaces of the honeycomb core 1 with the cell axis direction facing forward and backward. The honeycomb panel 4 is an integrated single unit. The rear layer B is provided with a honeycomb core 7 in which the cell axis direction is directed forward and backward and the substantially triangular wave-shaped irregularities 6 are formed on the front side. And the front layer A
On the rear face material 3 of the honeycomb panel 4, the tops 8 of the substantially triangular wave-shaped irregularities 6 formed on the honeycomb core 7 of the rear layer B are formed.
But it is glued.

The impact absorbing material of the first embodiment will be described in more detail. First, the honeycomb panel 4 of the front layer A has a honeycomb core 1 made of a metal such as aluminum or the like as a core material, and has front and rear cell end surfaces thereof, respectively.
It is formed by adhering face plates 2 and 3 made of aluminum plates. The honeycomb core 1 is made up of a planar aggregate of hollow columnar cells 13 partitioned by the cell walls 12 into independent spaces.
2 and the cross-sectional shape of the cell 13 includes various shapes other than a regular hexagon, and is lightweight and has high rigidity and strength. The front-rear size and the cell size are appropriately selected, and the front-rear size is, for example, about 250 mm. It should be noted that such a honeycomb core 1 may be formed by a spreading method of cutting, adhering, stacking, adhering and spreading the base material sheet, or by corrugating the base material sheet into a corrugated sheet, followed by cutting, joining, It is formed by a corrugated method of stacking. The front layer A is composed of a honeycomb panel 4 which is a single panel in which face materials 2 and 3 are bonded to both surfaces of such a honeycomb core 1.

The honeycomb core 7 of the rear layer B is made of metal such as aluminum in accordance with the honeycomb core 1 of the front layer A described above.
The honeycomb core 1 is appropriately selected so as to be the same as or different from the honeycomb core 1. The honeycomb core 7 is formed with the continuous triangular wave-like irregularities 6 on the front side.
The unevenness 6 of equal pitch is formed, and the central two are about half the size of the honeycomb core 1 in the front-rear direction.
Two pieces on the left and right sides are about 70 to 80% of the front and rear size of the honeycomb core 1. Further, the honeycomb core 7 of the rear layer B is of a type composed of a continuous and integral single body (see FIG. 1 (3)), or one divided at the partition 5 ', for example, the center. , One divided into two groups each on the left and right, or one divided into each one (see FIG. 1 (4)) are appropriately selected and used.
Further, the honeycomb core 7 in the illustrated example has all the cell end surfaces on the rear side adhered to the contact plate 10 with the adhesive 9, and thus has a panel shape, but it is also possible that the contact plate 10 does not exist regardless of this. .

The tops 8 of the substantially triangular wave-shaped irregularities 6 of the honeycomb core 7 of the rear layer B are adhered to the rear surface material 3 of the honeycomb panel 4 of the front layer A with an adhesive 9. There is.
That is, each top portion 8 has a flat tip, for example, a width of 12 mm.
A bonding margin 14 of a certain degree is formed (see (2) of FIG. 1), and bonding with the adhesive 9 is performed through the bonding margin 14. The impact absorbing material of the first embodiment has such a structure.

Next, the shock absorbing material of the second embodiment shown in FIG. 2 will be described. In the impact absorbing material of the second embodiment, in the front layer A, the face materials 2 and 3 are bonded to both surfaces of the honeycomb core 1 with the cell axis direction facing forward and backward, and each honeycomb panel is divided into a plurality of pieces. It consists of 4. The rear layer B is provided with a honeycomb core 7 in which the cell axis direction is directed forward and backward and the substantially triangular wave-shaped irregularities 6 are formed on the front side. And the front layer A
For each face material 3 on the rear side of each of the divided honeycomb panels 4 of
Three or more apexes 8 of the substantially triangular wave-shaped irregularities 6 formed on the honeycomb core 7 of the rear layer B are adhered.

The impact absorbing material of the second embodiment will be described in more detail. First, the honeycomb panel 4 of the front layer A is
Similar to the first embodiment described above, the face materials 2 and 3 are adhered to both surfaces of the honeycomb core 1 which is the core material, but not the single unit as in the first embodiment. As in the case of the conventional example of this kind of No. 5, it is divided into three or the like at the division place 5. Further, the honeycomb core 7 of the rear layer B has the substantially triangular wave-shaped irregularities 6 formed on the front side thereof as in the case of the first embodiment described above, but the single honeycomb panel 4 of the front layer A is divided. On the other hand, for example, three tops 8 of the unevenness 6 are adhered. The honeycomb core 7 of the illustrated example is one in which one unevenness 6 is divided into two in the center at the left and right, and the other undivided unevenness 6 is bonded to the left and right while aligning the valley side.
It is used as a unit (see FIG. 2 (3)).
In the illustrated example, the upper surface thus has a substantially W-shape 1
A unit honeycomb core 7 is divided into a single honeycomb panel 4 of the front layer A at the three apexes 8 at the center and left and right ends thereof.
Each time, it is adhered to the center and the left and right ends with an adhesive 9 (see FIG. 2 (2)). In addition, the honeycomb cores 7 of each unit as described above are appropriately continuously bonded to each other, and the rear side is bonded to the contact plate 10 like the first embodiment to form a panel shape. In the impact absorbing material of the second embodiment, since the honeycomb panel 4 of the front layer A is divided, the impact absorbing performance and the crush strength required for each of them are different. There is an advantage that different strengths can be individually adopted. The shock absorbing material of the second embodiment has such a structure.

The impact absorbing materials of the first and second embodiments as described above are required to have the required impact absorbing performance and crush strength as shown in FIGS. 3 (1) and 3 (2). In order to deal with the difference in the shape and the change in the shape of the door C or the like on the side surface of the vehicle to be collided, two pieces having different front and rear sizes are often used side by side. In this case, two such impacts are used. The absorbers are lined up with a gap 15 to eliminate mutual interference. Then, such an impact absorbing material is moved toward a door C or the like on the side surface of the vehicle to be collided and collided while being moved at a constant speed as shown by an arrow in (2) of FIG. It should be noted that E in FIG. 3 (2) is a test block assuming a collision vehicle side, and a shock absorber is attached to the front surface of this test block E and moves together.

Next, the shock absorbing material of the third embodiment shown in FIG. 4 will be described. In the third embodiment, the front layer A is composed of a honeycomb panel 4 in which a face material 3 is bonded to at least the rear side of a honeycomb core 1 with the cell axis direction facing forward and backward. The rear layer B is provided with a honeycomb core 7 in which the cell axis direction is directed forward and backward and the substantially triangular wave-shaped irregularities 6 are formed on the front side. Then, the face material 3 on the rear side of the honeycomb panel 4 of the front layer A
A bent plate for adhering the tops 8 of the irregularities 6 of the honeycomb core 7 of the rear layer B to the honeycomb panel 4 of the front layer A and the honeycomb core 7 of the rear layer B integrally. A cover material 11 having a shape of a circle is attached.

The impact absorbing material of the third embodiment will be described in more detail. First, the honeycomb panel 4 of the front layer A is
Similar to the first and second embodiments described above, the honeycomb core 1 is composed of the face materials 2 and 3 adhered to both surfaces thereof, and is an integral single unit as in the first embodiment. The same as that of the second embodiment, or the one divided into a plurality of pieces as in the second embodiment, and the like are used. As the honeycomb core 7 of the rear layer B, one according to the above-described first embodiment or second embodiment is appropriately used, and each top portion 8 of the substantially triangular wave-shaped irregularities 6 formed on the front side of the honeycomb core 7 is formed in the front layer. Honeycomb panel 4 of A
The rear surface material 3 is adhered with an adhesive 9. As a matter of course, the honeycomb core 7 of the rear layer B is also integrally continuous or divided, and in the illustrated example, the rear side has a panel shape in which the rear side is adhered to the contact plate 10.

The cover material 11 integrally fixes the honeycomb panel 4 of the front layer A and the honeycomb core 7 of the rear layer B, and in the illustrated example, the front plate portion 16 and the rear plate portion 1 are formed.
7 and a connecting plate portion 18 between the two, forming a bent aluminum plate shape. And the cover material 11 of the illustrated example
Then, the front plate portion 16 bent at a right angle from the connecting plate portion 18 to the inside is formed on the front face material 2 of the honeycomb panel 4 of the front layer A,
It is attached and fixed by gluing. Also, the connecting plate portion 18
Is attached to the flat surface of the shock absorbing material, and the connecting plate portion 18
The rear plate portion 17 bent at a right angle to the outside is attached and fixed to the outer extending portion of the contact plate 10 adhered to the rear side of the honeycomb core 7 of the rear layer B by adhesion or the like. In the example shown in FIG. 4 (1), the two shock absorbers shown in FIG. 3 (2) are used side by side.
The cover material 11 as shown in FIG.

The cover material 11 may have various other shapes and structures, not depending on the illustrated example.
For example, the rear plate part 17 is bent inward and fixed to the back plate 10 of the rear layer B, and the front plate part 16 of the cover material 11 is the front side of the honeycomb panel 4 of the front layer A. Of the type which also serves as the face material 2 of the above, and the type in which the rear plate portion 17 of the cover material 11 also serves as the backing plate 10 of the rear layer B,
And so on. And the cover material 11 of the combined type
The use of is advantageous in that productivity is improved and cost is excellent. The shock absorbing material of the third embodiment has such a structure.

The present invention is constructed as described above. Then it becomes as follows. The impact absorbing material for the collision test is particularly required to have an impact absorbing performance at the initial stage of collision and an impact absorbing performance after the middle stage. Therefore, the front layer A is made of the honeycomb panel 4, and the rear layer B is substantially triangular on the front side. The honeycomb core 7 is provided with the wavy concavities and convexities 6 and the front and rear layers A and B are bonded to each other at the tops 8 of the concavities and convexities 6 to form a front and rear two-layer structure. During the collision test, the impact absorbing material is attached to the front surface of the test block E having the characteristics assuming the collision vehicle side, and is collided from the front layer A side with the door C or the like on the side surface of the collided vehicle (Fig. See (2) figure of 3).
Due to the impact load at the time of collision, the honeycomb core 1 of the honeycomb panel 4 of the front layer A is appropriately buckled, and the honeycomb core 7 of the rear layer B is gradually bent from the tops 8 side of the substantially triangular wave-shaped irregularities 6. By buckling, the impact load at the time of a collision is alleviated, absorbed, and buffered, and a predetermined uniform impact load is applied to the door C or the like on the side of the collided vehicle.

For example, the honeycomb core 7 in the rear layer B is shown in FIG.
As shown in FIG. 3 (3), in the initial stage of the collision, only the vicinity of the top 8 of the unevenness 6 buckles, and as shown in FIG. 3 (4), in the latter stage of the collision. For example, the above-described cushioning or the like is performed by buckling almost entirely.
It should be noted that FIG. 3 (5) is a graph of such a buffering capacity test of the honeycomb core 7 of the rear layer B. The progressing state of the buckling, that is, the buffering state of the impact load is shown with the passage of time. The initial value is small, and thereafter, the value gradually increases in an averaged wavy state.

Now, the shock absorbing material is the first shock absorbing material shown in FIG.
In the embodiment, a single unitary honeycomb panel 4 is used as the front layer A, and in the second embodiment of FIG. 2, each of the divided front honeycomb panels 4 of the front layer A has a rear layer. B
3 has three or more top portions 8 of the substantially triangular wave-shaped irregularities 6 of the honeycomb core 7 adhered thereto. Further, in the third embodiment of FIG. 4, in addition, the front layer A and the rear layer B are integrally fixed. A bent plate-shaped cover material 11 is attached. So this first,
The shock absorbers of the second and third embodiments have the following first and second effects.

First, due to the presence of a protrusion such as a handle D such as a door C on the side surface of the vehicle to be struck ((2) in FIG. 3, and also (2) and (3) in FIG. 5). If a collision occurs in the one-sided contact state, a local impact load is applied to the protrusions such as the handle D. In this case, the following occurs. First, the first of FIG.
In the impact absorbing material of the example, the honeycomb panel 4 of the front layer A is not divided, and is made of an integral single body without the partition portions 5. Therefore, partial buckling of the honeycomb core 1 of the honeycomb panel 4 of the front layer A or the like can sufficiently cope with the local impact load due to the protrusions such as the handle D described above. (3) Like this type of conventional example in the figure,
Peeling of the adhesive 9 between the front layer A and the back layer B, peeling between the front layer A and the back layer B, inclination to the back layer B side of the front layer A, partial drop,
The falling off of the front layer A and the like are surely prevented.

Further, in the impact absorbing material of the second embodiment of FIG. 2, although the honeycomb panel 4 of the front layer A is divided (in the illustrated example, it is divided into three), each of the divided portions. For each honeycomb panel 4, three or more apex portions 8 of the substantially triangular wave-shaped irregularities 6 of the honeycomb core 7 of the rear layer B (3 in the illustrated example).
The front layer A is strongly supported by the rear layer B at three or more fulcrums (in the illustrated example, three fulcrums with well-balanced center, left and right ends). As described above, since there are many fulcrums as compared with the two-point support of the conventional example of this kind shown in FIG. 5, the handle D described above is caused by partial buckling of the honeycomb core 1 of the honeycomb panel 4 of the front layer A. It is possible to sufficiently cope with a local impact load due to the protrusions such as, for example, even when the partition 5 between the honeycomb panels 4 of the front layer A collides with the protrusions such as the handle D at corresponding positions. Similarly, it can be sufficiently dealt with. Therefore, the adhesive 9 between the front layer A and the rear layer B
Peeling, peeling between the front layer A and the rear layer B, inclination to the rear layer B side of the front layer A, partial depression, front as in the conventional example of this kind in FIG. The layer A is surely prevented from falling off.

Furthermore, in the impact absorbing material of the third embodiment of FIG. 4, the front panel A of the honeycomb panel 4 and the rear layer B of the honeycomb core 7 are formed into a bent plate-like cover material 11. It is fixed integrally. Therefore, partial buckling of the honeycomb core 1 of the honeycomb panel 4 of the front layer A or the like can sufficiently cope with the local impact load due to the protrusions such as the handle D described above. (3) Peeling of the adhesive 9 between the front layer A and the rear layer B, peeling between the front layer A and the rear layer B, and the rear layer B side of the front layer A, as in the conventional example of this kind in the figure. Inclination, partial depression, falling of the front layer A, etc. are reliably prevented. Therefore, in the shock absorbers of the first, second, and third embodiments as described above, not only in the case of collision in the entire surface contact, but also in the case of collision in the single contact state, the applied impact The load can be alleviated, absorbed and buffered uniformly, and the shock load can be received evenly over the entire surface, so that the desired shock absorption performance can be reliably obtained.

Secondly, in the impact absorbing material of the first embodiment, since the honeycomb panel 4 of the front layer A is made of a single unit, each top of the unevenness 6 of the honeycomb core 7 of the rear layer B is as follows. 8 is firmly adhered. In addition, in the shock absorbing material of the second embodiment, each of the divided honeycomb panels 4 of the front layer A has the tops 8 of the unevenness 6 of the honeycomb core 7 of the rear layer B.
3 or more are bonded, and the two are securely bonded. Further, in the shock absorbing material of the third embodiment, the front layer A and the rear layer B are integrally fixed by the cover material 11 in addition to being adhered. Therefore, in the shock absorbing materials of the first, second, and third embodiments, the front layer A and the rear layer B are damaged or peeled off during transportation, movement, or acceleration for collision.
It is surely prevented from disassembling and dropping off. In particular, since the shock absorbing material of the third embodiment is fixed by the cover material 11, these are extremely reliably prevented.

[0032]

As described above, the impact absorbing material for a collision test according to the present invention is characterized in that, in claim 1, since an integral single honeycomb panel is adopted as the front layer, The cover for integrally fixing the front layer and the rear layer according to claim 3, wherein three or more tops of the concave and convex portions of the honeycomb core of the rear layer are bonded to each of the divided front honeycomb panels. By adopting the materials, the following effects are exhibited.

First, the desired shock absorbing performance can be obtained. In other words, the impact absorbing material for the collision test prevents the adhesive from peeling off, peeling off, partially falling, and dropping even when it collides in a one-sided state, so that the applied impact load is uniformly alleviated. By absorbing and buffering, it can be received uniformly and entirely, and the desired shock absorption performance can be obtained.

Secondly, it is excellent in stability such that damage, peeling, disassembly, dropout, etc. are prevented during transportation, movement and acceleration for collision. The impact absorbing material of claim 3 is particularly excellent in this aspect. As described above, the effects of the present invention are remarkably large, such as the problems existing in this type of conventional example are eliminated.

[0035]

[Brief description of drawings]

FIG. 1 is a first impact absorbing material for a collision test according to the present invention.
An example is shown, (1) is a plan view, (2) is an enlarged view of the main part, (3) is a perspective view of an example of a honeycomb core of the rear layer, and (4) is a rear layer. It is a perspective view of another example of a honeycomb core.

FIG. 2 is a second impact absorbing material for a collision test according to the present invention.
An embodiment is shown, (1) is a plan view, (2) is an enlarged view of a main part thereof, and (3) is an exploded perspective view of a honeycomb core of a subsequent layer.

3A and 3B show a usage state of such a shock absorber for a collision test, wherein FIG. 1A is a schematic perspective view of a state in which it is placed upright, FIG. 2B is a side explanatory view, and FIG. Plane explanatory drawing of the main part of the honeycomb core of the rear layer in the initial stage of collision, (4) FIG.
(5) FIG. 5 is a graph of the buffer capacity test of the same honeycomb core.

FIG. 4 is a third impact absorbing material for a collision test according to the present invention.
An embodiment is shown, (1) is a side explanatory view, (2) is a side view of the cover material, and (3) is an exploded perspective view of a main part.

FIG. 5 shows a shock absorbing material for a collision test of this type of conventional example, FIG. 1 (1) is a plan view, FIG. 2 (2) is a plan explanatory view of a main part in its use state, and FIG. It is a plane explanatory view of a part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Honeycomb core 2 Face material 3 Face material 4 Honeycomb panel 5 Partition location 5'Partition location 6 Unevenness 7 Honeycomb core 8 Top part 9 Adhesive 10 This plate 11 Cover material 12 Cell wall 13 Cell 14 Adhesion allowance 15 Gap 16 Front plate 17 Rear plate 18 Connection plate A Front layer B Rear layer C Door D Handle E Test block

Claims (3)

[Claims] 1. A shock absorbing material for a front and rear two-layered structure for a collision test, wherein the front layer is a unitary honeycomb in which face materials are adhered to both sides of a honeycomb core whose cell axis direction is front and back. The rear layer comprises a panel, and the rear layer is provided with a honeycomb core in which the cell axis direction is directed forward and backward and substantially triangular wave-shaped irregularities are formed on the front side. A shock absorber for a crash test, wherein each top of the unevenness of the honeycomb core of the layer is adhered. 2. A shock absorber for a front and rear two-layered structure for a collision test, wherein the front layer has a face material adhered to both sides of a honeycomb core whose cell axial direction faces front and back and is divided into a plurality of parts. The rear layer comprises a honeycomb core in which the cell axis direction is directed forward and backward and the substantially triangular wave-shaped irregularities are formed on the front side, and the rear layer is divided into rear honeycomb panels. An impact absorbing material for a collision test, characterized in that three or more apex portions of the unevenness of the honeycomb core of the rear layer are adhered to each side surface material. 3. A shock absorbing material for a collision test having a front and rear two-layer structure, wherein the front layer is made of a honeycomb panel in which a face material is bonded to at least a rear side of a honeycomb core whose cell axis direction is front and rear. The rear layer is provided with a honeycomb core in which the cell axis direction is directed forward and backward and substantially triangular wave-shaped irregularities are formed on the front side, and the rear layer honeycomb material is formed on the rear surface material of the front honeycomb panel. The tops of the irregularities are glued together, and
A shock absorbing material for a collision test, comprising a bent plate-shaped cover material that integrally fixes the honeycomb panel of the front layer and the honeycomb core of the rear layer.