JP3204585B2 - Shock absorber for crash test - Google Patents

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, the present invention relates to a shock absorbing material which is used, for example, in a side impact test on an automobile and is attached to a front surface of a test block on the side of a collision vehicle.

[0002]

2. Description of the Related Art A collision test on a door or the like on a side of an automobile is an important theme in conducting research on safety and protection measures for vehicles and occupants. By the way, in a collision test on such a collision vehicle, a urethane foam or a honeycomb core has conventionally been used as a moving barrier having characteristics supposed on the collision vehicle side, that is, as a shock absorbing material attached to the front surface of the test block. Used. The honeycomb core as the shock absorbing material is generally made of aluminum, but is excellent in shock absorbing performance, can uniformly absorb shock, and applies a predetermined uniform impact load to the side of the vehicle to be impacted. It has been noted for its excellent properties, such as being lightweight, poor in resilience, not rebounding, and requiring no maintenance, and has recently been widely developed and used.

FIG. 5 shows a conventional example of a shock absorbing material for a collision test using such a honeycomb core. FIG. 1 (1) is a plan view, and FIGS. It is a plane explanatory view of the principal part of. This kind of shock absorbing material is particularly required to have a particularly strong shock absorbing performance in the initial stage of the collision and in the middle stage and thereafter, and 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. The honeycomb core 7 is divided into sections and the like, and a honeycomb core 7 having a substantially triangular wave-shaped unevenness 6 formed on the front side while the cell axis direction is similarly directed forward and backward is used as the rear layer B. For each rear panel 3 of the honeycomb panel 4 divided into three such as the front layer A, the top 8 of the substantially triangular wave-shaped unevenness 6 of the honeycomb core 7 constituting the rear layer B is 2 They were adhered individually by the adhesive 9. In the figure, reference numeral 10 denotes a contact plate, and the contact plate 10 is bonded to the rear side of the honeycomb core 7 of the rear layer B with an adhesive 9.

[0004]

The following problems have been pointed out in such a conventional example. First,
As shown in FIG. 5 (2), such a shock-absorbing material for a collision test is caused to collide from the front side, that is, the front layer A side, with the door C or the like on the side surface of the collision vehicle. Then, the honeycomb core 1 of the honeycomb panel 4 of the front layer A appropriately buckles and the honeycomb core 7 of the rear layer B by the impact load at that time.
However, by gradually buckling from the top 8 side of the unevenness 6, the applied impact load is uniformly alleviated, absorbed and buffered,
As a result, it was to be uniformly and completely received.

By the way, the door C or the like generally has a projection such as the handle D in many cases. Then, the projections such as the handle D cause a collision in a so-called one-sided contact state, and a local impact load is applied to the shock absorbing material.
This may cause a problem in absorbing the shock, which has been a problem. That is, first, when the impact absorbing material collides against a door or the like on the side surface of the collision vehicle in a so-called overall contact state, the intended impact 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 impacted and the impact absorbing material collides in a one-sided state, the impact absorbing material will receive a local impact load. As described above, the honeycomb panel 4 of the front layer A is divided into three parts and the like, and each of the divided parts is bonded to the two tops 8 of the unevenness of the rear layer B, and two points are formed near the center of each part. It is only supported. Therefore, it often becomes difficult for the shock absorbing material to withstand a local shock load applied by such a protrusion such as the handle D. In particular, when the partitioning portion 5 between the honeycomb panels 4 of the front layer A collides with a protrusion such as the handle D, the adhesive 9 between the front layer A and the rear layer B due to a local impact load. Peeling, front layer A
Between the back layer B and the front layer A, the back layer B of the honeycomb panel 4 of the front layer A
Side tilting, partial dip, drop off, etc. may occur. As a result, the conventional shock absorbers do not have uniform relaxation, absorption, and cushioning of the applied impact load, and cannot receive the impact load uniformly over the entire surface. It has been pointed out that absorption performance cannot be obtained.

The present invention has been made in view of such circumstances, and has been made in order to solve the problems of the above-described conventional example. In the first aspect, each divided front-layer honeycomb panel is provided with a rear-layer honeycomb panel. By making three or more tops of the irregularities of the honeycomb core adhere to each other, in claim 2, by adopting a cover material for integrally fixing the front layer and the rear layer,
First, even in the case of a collision in a one-sided collision, the impact load can be uniformly reduced, absorbed, and buffered, and the intended impact absorption performance can be obtained. Second, acceleration during transportation, movement, and collision can be achieved. An object of the present invention is to propose a shock absorbing material for a crash test, which can prevent damage, peeling, decomposition, falling off, etc. in the inside.

[0007]

The technical means of the present invention for achieving this object is as follows. First, claim 1
Is as follows. That is, the shock absorbing material for the collision test has a front and rear two-layer structure. And the front layer,
It consists of a honeycomb panel divided into a plurality of pieces while a face material is adhered to both sides of the honeycomb core with the cell axis direction facing forward and backward. The rear layer is provided with a honeycomb core having a cell axis direction directed back and forth, and a substantially triangular wave-shaped unevenness formed on the front side. Then, three or more tops of the concave and convex portions of the honeycomb core of the rear layer are bonded to each rear face material of each of the divided honeycomb panels of the front layer.

[0008] Claim 2 is as follows. That is, the shock absorbing material for the collision test has a front and rear two-layer structure. The front layer is formed of a honeycomb panel in which a face material is adhered to at least the rear side of the honeycomb core having the cell axis direction directed back and forth. The rear layer is provided with a honeycomb core in which the cell axis direction is directed to the front and rear and substantially triangular wave-shaped irregularities are formed on the front side. Then, each top of the unevenness of the honeycomb core of the rear layer is adhered to the face material on the rear side 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 member is fixed to the cover member.

[0009]

The present invention comprises the above-mentioned means, and operates as follows. The impact absorbing material for this collision test has a front layer formed of a honeycomb panel, a rear layer provided with a honeycomb core having substantially triangular wave-shaped irregularities formed on the front side, and a front layer and a rear layer formed on each of the tops of the irregularities. It has a two-layer structure of front and back bonded. At the time of a collision test, the vehicle is attached to the front of the test block and collides with, for example, a door on the side surface of the vehicle to be impacted. Then, by the impact load at the time of the collision, the honeycomb core of the front layer honeycomb panel buckles appropriately, and the honeycomb core of the rear layer gradually buckles from each top side of the unevenness, so that the impact load is reduced. Relieve, absorb, buffer.

In the shock absorbing material of the first aspect, although the front honeycomb panel is divided, three or more tops of the irregularities of the rear honeycomb core are bonded to each other, The layer is strongly supported at three or more fulcrums in the back layer. Furthermore, in the shock absorbing material of claim 2,
The front honeycomb panel and the rear honeycomb core are integrally fixed by a bent plate-like cover material.

In the shock absorbing material according to the first and second aspects of the present invention, first, a protrusion such as a handle on a door or the like on the side surface of the vehicle to be impacted causes a one-sided contact. Even if it receives a collision and a local impact load, it can sufficiently cope with such a local impact load due to partial buckling of the honeycomb core of the honeycomb panel of the front layer, and the adhesion between the front layer and the rear layer. The peeling and peeling of the agent, the inclination of the front layer, the partial fall,
It is surely prevented. Therefore, the shock absorbing material according to the first and second aspects can uniformly reduce, absorb, and buffer an impact load, and can uniformly receive the entire surface, so that the intended shock absorbing performance can be reliably obtained. .

Second, the front and rear layers of the shock absorbing material may be damaged, peeled off during transportation, moving, or during acceleration due to collision.
Decomposition, falling off, etc. are also prevented.
These are very reliably prevented.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. First, FIG. 1 shows a reference example which does not belong to the present invention. (1) FIG. 1 is a plan view, (2) is an enlarged view of a main part thereof, and (3) is a honeycomb core 7 of a rear layer B. FIG. 4D is a perspective view of another example of the honeycomb core 7 of the rear layer B. FIG. FIG. 2 shows a first embodiment of the present invention,
(1) Figure is a plan view, (2) Figure is an enlarged view of the main part,
(3) is an exploded perspective view of the honeycomb core 7 of the subsequent layer B. FIGS. 3A and 3B show the states of use, (1) FIG. 3 is a schematic perspective view of a standing state, (2) FIG.
FIG. 3 (3) is a plan view of the main part of the honeycomb core 7 of the rear layer B in the early stage of the collision, FIG. 4 (4) is a plan view of the main part of the honeycomb core 7 in the late stage of the collision, and FIG. 3 is a graph of a buffering capacity test. FIG. 4 shows a second embodiment of the present invention. FIG. 4A is an explanatory side view, FIG. 4B is a side view of the cover member 11, and FIG.

The impact absorbing material for the crash test is composed of a front layer A
And a two-layer structure before and after the back layer B. First, referring to the reference example of FIG. 1, in the shock absorbing material of this reference example,
The front layer A is composed of an integral unitary honeycomb panel 4 in which face materials 2 and 3 are adhered to both surfaces of a honeycomb core 1 whose cell axis direction is directed forward and backward. In the rear layer B, a substantially triangular wave-like unevenness 6 was formed on the front side while turning the cell axis direction back and forth.
A honeycomb core 7 is provided. Then, the honeycomb core 7 of the rear layer B is provided on the face material 3 on the rear side of the honeycomb panel 4 of the front layer A.
Each of the tops 8 of the substantially triangular wave-shaped irregularities 6 formed is bonded.

With respect to the shock absorbing material of the reference example,
Further details will be described. First, the honeycomb panel 4 of the front layer A
Is made by using a honeycomb core 1 made of a metal such as aluminum or the like as a core material, and bonding face materials 2 and 3 made of an aluminum plate to both front and rear cell end surfaces, respectively. The honeycomb core 1 is composed of a planar aggregate of hollow columnar cells 13 partitioned into independent spaces by cell walls 12.
The cross-sectional shape of the cell 13 is not limited to a regular hexagon, but may be of various shapes, and has characteristics such as light weight and high rigidity and strength. The front and rear size and the cell size are appropriately selected, but the front and rear size is, for example, about 250 mm. In addition, such a honeycomb core 1 cuts the base material sheet, applies an adhesive, stacks,
It is formed by a stretching method of bonding and spreading, or a corrugating method of cutting, joining, and laminating after corrugating a base material sheet into a corrugated sheet. The front layer A is made of a honeycomb panel 4 which is a single panel that is not divided and has face materials 2 and 3 adhered to both surfaces of such a honeycomb core 1.

The honeycomb core 7 of the rear layer B is made of a metal such as aluminum according to the honeycomb core 1 of the front layer A described above.
Is appropriately selected so as to be the same as or different from the honeycomb core 1. The honeycomb core 7 has a substantially triangular wave-like unevenness 6 formed continuously on the front side.
In addition to the irregular pitches 6 formed at the same pitch, the two central ones are about half the front and rear size of the honeycomb core 1,
The left and right two have a size of 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 formed of a continuous and integral single body (see FIG. 1 (3)), or a type divided at a section 5 ′, for example, a center. , One divided into two groups each on the left and right and one divided into one each (see FIG. 1 (4)) are appropriately selected and used.
In addition, the honeycomb core 7 has a rear panel cell end surface which is entirely adhered to the contact plate 10 with an adhesive 9, thereby forming a panel shape. However, it is possible that the contact plate 10 does not exist regardless of this.

Then, the respective top portions 8 of the substantially triangular wave-shaped irregularities 6 of the honeycomb core 7 of the rear layer B are adhered to the rear face material 3 of the honeycomb panel 4 of the front layer A with an adhesive 9. I have.
That is, each top 8 has a flat tip, for example, a width of 12 mm.
A degree of bonding margin 14 is formed (see FIG. 1 (2)), and bonding with the adhesive 9 is performed via the bonding margin 14. The shock absorbing material of the reference example is as described above.

Hereinafter, the present invention will be described. First, the shock absorber according to the first embodiment of the present invention shown in FIG. 2 will be described. In the shock absorbing material of the first embodiment, the front layer A
Is composed of honeycomb panels 4 divided into a plurality of pieces while face materials 2 and 3 are adhered to both sides of a honeycomb core 1 whose cell axis direction is directed forward and backward. The rear layer B includes a honeycomb core 7 in which the cell axis direction is directed to the front and back, and the substantially triangular wave-shaped unevenness 6 is formed on the front side. Then, three or more tops 8 of the substantially triangular wave-shaped unevenness 6 formed on the honeycomb core 7 of the rear layer B are bonded to each of the rear face members 3 of each of the divided honeycomb panels 4 of the front layer A. Have been.

The shock absorbing material of the first embodiment will be described in more detail. First, the honeycomb panel 4 of the front layer A is
Like the above-described reference example, the face materials 2 and 3 are adhered to both surfaces of the honeycomb core 1 serving as the core material. Similar to the conventional example, it is divided into three parts or the like at the division location 5. Further, the honeycomb core 7 of the rear layer B has the substantially triangular wave-shaped irregularities 6 formed on the front side similarly to the above-described reference example. For example, three tops 8 of the irregularities 6 are bonded. The honeycomb core 7 shown in the illustrated example is obtained by dividing one unevenness 6 into two parts at the center in the left and right directions and bonding the other one of the undivided unevenness 6 to the left and right sides with the valley side as one unit. (See FIG. 2 (3)). In the illustrated example, one unit of the honeycomb core 7 having a substantially W-shaped upper surface is formed by three tops 8 at the center, left and right ends thereof.
Each of the divided honeycomb panels 4 of the front layer A is bonded to the center, left and right ends thereof with an adhesive 9 (see FIG. 2 (2)). In addition, the honeycomb cores 7 of the respective units are appropriately and continuously bonded to each other, and have a panel shape in which the rear side is bonded to the corresponding plate 10 in the illustrated example, similarly to the reference example. In the shock absorbing material of the first embodiment, since the honeycomb panel 4 of the front layer A is divided, the required shock absorbing performance and
There is an advantage that different strengths can be individually employed in accordance with the difference in the crash strength. The shock absorbing material of the first embodiment is as described above.

As shown in FIGS. 3A and 3B, the shock absorbing material according to the first embodiment differs in the required shock absorbing performance and required crash strength and the impacted vehicle. In order to cope with a change in the shape of the door C on the side surface of the vehicle, two doors having different overall front and rear sizes are often used side by side. In this case, such two shock absorbers are disposed between each other. They are arranged with a gap 15 in order to eliminate interference. Then, such a shock absorbing material is moved at a constant speed and collides toward the door C or the like on the side surface of the collision vehicle, as indicated by an arrow in FIG. 3B. E in FIG. 3 (2) is a test block assuming the collision vehicle side, and a shock absorber is attached to the front surface of the test block E and moves together.

Next, a shock absorbing material according to a second embodiment of the present invention shown in FIG. 4 will be described. In the second embodiment, the front layer A
Consists of a honeycomb panel 4 in which a face material 3 is adhered to at least the rear side of a honeycomb core 1 with the cell axis direction facing forward and backward. The rear layer B includes a honeycomb core 7 in which the cell axis direction is directed to the front and back, and the substantially triangular wave-shaped unevenness 6 is formed on the front side. Then, the tops 8 of the irregularities 6 of the honeycomb core 7 of the rear layer B are bonded to the face material 3 on the rear side of the honeycomb panel 4 of the front layer A, and the honeycomb panel 4 of the front layer A and the rear layer B are A bent plate-like cover member 11 for integrally fixing the honeycomb core 7 is provided.

The shock absorber of the second embodiment will be described in more detail. First, the honeycomb panel 4 of the front layer A is
As in the above-described reference example and the first embodiment, the honeycomb core 1 is formed by bonding face materials 2 and 3 to both surfaces of the honeycomb core 1, and is also formed by an integral single body as in the reference example. Or, like those of the first embodiment, those divided into a plurality of parts are used. Honeycomb core 7 of rear layer B
Also, those according to the above-described reference example and the first embodiment are appropriately used, and each of the tops 8 of the substantially triangular wave-shaped unevenness 6 formed on the front side is formed on the rear side of the honeycomb panel 4 of the front layer A. It is bonded to the face material 3 with an adhesive 9. Of course, back layer B
As the honeycomb core 7, an integrally continuous one or a divided one is used, and in the illustrated example, the honeycomb core 7 has a panel shape in which the rear side is bonded to the corresponding plate 10.

The cover member 11 integrally fixes the honeycomb panel 4 of the front layer A and the honeycomb core 7 of the rear layer B. In the illustrated example, the front plate portion 16 and the rear plate portion 1 are fixed.
7 and a connecting plate portion 18 between them to form a bent aluminum plate. Then, the cover material 1 in the illustrated example
In FIG. 1, the front plate portion 16 bent inward at a right angle from the connection plate portion 18 is a front face material 2 of the front panel A of the honeycomb panel 4.
And is fixedly attached by bonding or the like. The connecting plate 18 is attached to a plane or the like of the shock absorbing material, and the rear plate 17 bent outward at a right angle from the connecting plate 18 is used as the rear layer B.
Is attached and fixed by adhesion or the like to an outwardly extending portion of the contact plate 10 adhered to the rear side of the honeycomb core 7. In the example shown in FIG. 4A, the two shock absorbers shown in FIG. 3B are used side by side, and as shown in FIG. 4B, respectively. The cover material 11 is attached.

The cover material 11 is not limited to the illustrated example, but may be of various other shapes and structures.
For example, the rear plate portion 17 is bent inward and attached and fixed to the back plate 10 of the rear layer B, and the front plate portion 16 of the cover material 11 is connected to the front side of the honeycomb panel 4 of the front layer A. A type in which the rear plate 17 of the cover material 11 also functions as the contact plate 10 of the rear layer B;
And so on. And the dual-purpose type cover material 11
The use of is advantageous in that productivity is improved and cost is excellent. The shock absorbing material of the second embodiment is as described above.

The present invention is configured as described above. Then, it becomes as follows. Since the shock absorbing material for the collision test is required to have particularly strong shock absorbing performance in the initial stage of the collision and in the middle stage and thereafter, the front layer A is formed of the honeycomb panel 4 and the rear layer B is substantially triangular on the front side. It has a honeycomb core 7 on which wavy irregularities 6 are formed, and has a front and rear two-layer structure in which such a front layer A and a rear layer B are bonded at each top 8 of the irregularities 6. The shock absorbing material is attached to the front surface of a test block E having characteristics supposed to be on the side of the collision vehicle during the collision test, and collides from the front layer A side with the door C on the side surface of the collision vehicle (FIG. 3 (2), etc.).
Accordingly, the honeycomb core 1 of the honeycomb panel 4 of the front layer A buckles as appropriate by the impact load at the time of the collision, and the honeycomb core 7 of the rear layer B gradually moves from the top 8 side of the substantially triangular wave-shaped unevenness 6. By buckling, the impact load at the time of the collision is reduced, absorbed, and buffered, so that a predetermined uniform impact load is applied to the door C on the side of the collision vehicle.

For example, the honeycomb core 7 of the rear layer B is shown in FIG.
As shown in FIG. 3C, in the early stage of the collision, only the vicinity of the top 8 of the unevenness 6 buckles, and as shown in FIG. For example, the above-described buffering or the like is performed by buckling almost entirely.
FIG. 3 (5) is a graph of such a buffer capacity test of the honeycomb core 7 of the rear layer B. The progress of the buckling, that is, the buffering of the impact load, is represented as time elapses. The initial value is small, and then the value gradually increases in an averaged waving state.

Now, this shock absorbing material is the first shock absorbing material in FIG.
In the embodiment, the substantially triangular wave-shaped irregularities 6 of the honeycomb core 7 of the rear layer B are provided for each of the divided honeycomb panels 4 of the front layer A.
3 or more are bonded to each other, and the second top of FIG.
In the embodiment, a bent plate-shaped cover member 11 for integrally fixing the front layer A and the rear layer B is provided. Therefore, the shock absorbing materials of the first, second and third embodiments are as follows.

First, due to the presence of a protrusion such as a handle D such as a door C on the side surface of the collision vehicle (FIG. 3 (2), and further FIG. 5 (2) and FIG. 3 (3)). In the case of a collision in a one-sided contact state, a local impact load is applied by a protrusion such as the handle D or the like, but in this case, it is as follows. First, the first of FIG.
In the shock absorbing material of the embodiment, the honeycomb panel 4 of the front layer A is divided (in the illustrated example, divided into three).
However, for each of the divided honeycomb panels 4, the top 8 of the substantially triangular wave-shaped unevenness 6 of the honeycomb core 7 of the rear layer B is
Three or more (three in the illustrated example) are adhered, and the front layer A has three or more fulcrums at the rear layer B (in the illustrated example, the center,
It is strongly supported by three well-balanced fulcrums at the left and right ends.

As described above, since the number of fulcrums is larger than the two-point support of the conventional example shown in FIG. 5, the honeycomb core 1 of the honeycomb panel 4 of the front layer A is partially buckled. It is possible to sufficiently cope with a local impact load caused by the protrusion such as the handle D. For example, the partitioning portion 5 between the honeycomb panels 4 of the front layer A collides with the protrusion such as the handle D and the like. In this case, it is possible to cope with the situation similarly. So,
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 after the front layer A as in the above-described conventional example of FIG. Incline to the layer B side, partial depression, falling off of the previous layer A, and the like are reliably prevented.

Next, in the shock absorbing material of the second embodiment shown in FIG. 4, the honeycomb panel 4 of the front layer A and the honeycomb core 7 of the rear layer B are made of a bent plate-like cover material 11. Are fixed integrally. Therefore, the partial buckling of the honeycomb core 1 of the honeycomb panel 4 of the front layer A can sufficiently cope with the local impact load caused by 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 Incline, partial depression, falling off of the front layer A, etc. are reliably prevented. Therefore, in the shock absorbers of the first and second embodiments, the impact load applied to the shock absorber is not limited to not only the case of the collision with the entire surface but also the collision with the one-side collision. In this way, the shock can be alleviated, absorbed and cushioned, and the impact load can be uniformly received over the entire surface, so that the expected impact absorption performance can be reliably obtained.

Secondly, in the shock absorbing material of the first embodiment, each of the divided honeycomb panels 4 of the front layer A has three tops 8 of the unevenness 6 of the honeycomb core 7 of the rear layer B. At least two pieces are bonded, and the two are securely bonded.
Further, in the shock absorbing material of the second embodiment, the front layer A and the rear layer B are integrally fixed by a cover material 11 in addition to bonding. Therefore, in the shock absorbing material of each of the first and second embodiments, the front layer A and the rear layer B are damaged, peeled, decomposed, dropped, etc. during transportation, movement, and acceleration for collision. This is reliably prevented. In particular, since the shock absorbing material of the second embodiment is fixed by the cover material 11, these are very reliably prevented.

[0032]

As described above, according to the first aspect of the present invention, in the impact absorbing material for a collision test according to the present invention, the top of the unevenness of the honeycomb core of the rear layer is formed for each divided honeycomb panel of the front layer. According to the second aspect of the present invention, since three or more pieces are adhered to each other, the following effects are exerted by employing a cover material for integrally fixing the front layer and the rear layer.

First, the desired shock absorbing performance can be obtained. In other words, the shock absorbing material for the crash test prevents the adhesive from peeling, peeling, partially falling, falling off, etc., even in the case of a collision in a one-sided state, and thus uniformly reduces the applied impact load. , Absorption and cushioning, and the entire surface can be uniformly received, and the desired shock absorption performance can be obtained.

Secondly, it is excellent in stability such that damage, peeling, disassembly, falling off, etc. are prevented during transportation, movement, and acceleration for collision. The shock absorbing material of claim 2 is particularly excellent in this aspect. As described above, the effects exhibited by the present invention are remarkably large, for example, the problems existing in this type of conventional example are eliminated.

[Brief description of the drawings]

FIG. 1 shows a reference example (not belonging to the present invention) of a shock absorbing material for a collision test. FIG. 1 is a plan view, FIG. 2 is an enlarged view of a main part thereof, and FIG. A perspective view of one example of the honeycomb core of the rear layer, and FIG. 4D is a perspective view of another example of the honeycomb core of the rear layer.

FIG. 2 shows a first example of a shock absorbing material for a crash test according to the present invention.
FIG. 1A is a plan view, FIG. 2B is an enlarged view of a main part thereof, and FIG. 3C is an exploded perspective view of a honeycomb core of a subsequent layer.

FIG. 3 shows a state of use of such a shock absorbing material for a collision test. FIG. 3 (1) is a schematic perspective view of a standing state, FIG. 3 (2) is a side view, and FIG. Plane explanatory view of the main part of the honeycomb core of the rear layer in the early stage of the collision, FIG. 4D is a plan view of the main part of the honeycomb core in the late part of the collision,
(5) Figure is a graph of a buffer capacity test of the honeycomb core.

FIG. 4 shows a second example of the shock absorbing material for a crash test according to the present invention.
Fig. 1 is an explanatory side view, (2) is a side view of a cover member, and (3) is an exploded perspective view of a main part.

5 (a) and 5 (b) show a conventional shock absorbing material for a collision test of this type. FIG. 5 (1) is a plan view, 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 division part 5 'division part 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 part 17 Rear plate part 18 Connecting plate part A Front layer B Rear layer C Door D Handle E Test block

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16F 7/12 B32B 3/12

Claims (2)

(57) [Claims] 1. A shock absorbing material for a crash test having a front and rear two-layer structure, wherein a front layer of a front layer is bonded to both surfaces of a honeycomb core having a cell axis direction directed forward and backward and divided into a plurality of pieces. The rear layer is provided with a honeycomb core having a substantially triangular wave-shaped unevenness formed on the front side with the cell axis direction facing forward and backward, and the rear layer is formed after each of the divided honeycomb panels of the front layer. 3. A shock absorber for a crash test, wherein three or more tops of the irregularities of the honeycomb core of the rear layer are bonded to each of the side face materials. 2. A shock absorbing material for a crash test having a front and rear two-layer structure, wherein the front layer is formed of a honeycomb panel having a face material adhered to at least a rear side of a honeycomb core whose cell axis direction is directed forward and backward. The rear layer comprises a honeycomb core having a cell axis direction directed back and forth, and a substantially triangular wave-shaped unevenness formed on the front side, and the rear layer honeycomb core is formed on a rear surface material of the front layer honeycomb panel. The tops of the irregularities are glued, and
An impact-absorbing material for a collision test, comprising a bent plate-shaped cover member for integrally fixing the honeycomb layer of the front layer and the honeycomb core of the rear layer.