JPH09207253A - Cushioning honeycomb core and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cushioning honeycomb core and its manufacture wherein a width is uniform, required cushioning performance is stably surely obtained, and it is simply easily represented. SOLUTION: The cushioning honeycomb core 8 is composed of a plane-like aggregate of a hollow columnar cell 4 formed with a cell wall 3, and is used for cushioning by buckling, of the cell wall 3. Then, in order to cope with relative size of the cushioning performance to be required, for a bond width between the cell walls, a standard width of a cell size D and further broader one or a narrower one are so set as to alternately positioned in the cell size D direction. Then, in a developing method, an arranged width of a bond material 7 to a base material 6 is adjusted to a standard broad arranged width C and a broad arranged width E of a narrow arranged width F. In a corrugating method, formed widths of a bottom part of a corrugation of a wave of a corrugated panel and its crest part are adjusted to standard one and broad one or narrow one. The cushioning honeycomb core is manufactured thereby.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cushioning honeycomb core and a method for manufacturing the same. That is, the present invention relates to a cushioning honeycomb core that exhibits cushioning performance due to buckling of cell walls, and a method for manufacturing the same.

[0002]

2. Description of the Related Art A honeycomb core is made up of a planar assembly of hollow columnar cells partitioned and formed by cell walls, and the cell walls buckle when subjected to an impact load exceeding the compressive strength in the axial direction of the cells. Therefore, it has the property of absorbing and relaxing impact energy. Therefore, the honeycomb core is attached to an object in order to protect various loads and other objects from an impact load by utilizing the buffering performance due to the buckling of the cell wall.
Widely used for buffering.

By the way, when the honeycomb core is used for cushioning as described above, the required cushioning performance varies in size. That is, the cushioning performance required for the honeycomb core used for cushioning varies depending on the type of the object to be protected and the magnitude of the applied impact load.
Then, usually, by varying the material, wall thickness, cell size, etc. of the honeycomb core, various required large and small cushioning performances are implemented. In other words, the material and base material of the honeycomb core can be selected from various metals and non-metals, and the cell wall of the honeycomb core, the wall thickness of the base material, and the foil thickness can be increased according to the required buffer performance. It is generally practiced to reduce or thin the cell size, and further increase or decrease the cell size, which is the cell size of the honeycomb core. However, in many cases, it is required for the honeycomb core to cope with various buffer performances of various sizes without changing the material, wall thickness, cell size and the like. That is, in many cases, it is necessary to provide a honeycomb core having the required cushioning performance while keeping the conditions such as material, wall thickness, and cell size constant.

FIG. 8 shows a conventional example of this kind. That is, FIG. 8 (1) is a plan explanatory view of an example of a conventional buffer honeycomb core used in such a case, (2)
The figure is a plane explanatory view of another example of the conventional cushioning honeycomb core, (3) is a graph showing an example of the cushioning performance due to its buckling, and (4) is the same cushioning. It is a graph which shows the other example of performance. By the way, conventionally, when the cushioning performance of various sizes is required without changing the conditions such as the material, the wall thickness, and the cell size, as shown in FIG. Do not use the buffer honeycomb core 1 that is still under-expanded, or as shown in Fig. 8 (2),
The buffer honeycomb core 2 in the over-expanded state has been typically used.

[0005] That is, as a typical method for manufacturing a honeycomb core, a spreading method in which base materials are stacked and line-bonded and then a tensile force is applied in the stacking direction to expand the base material is used. Regardless of the general regular expansion (expansion of 100%) in which the shape of the cell 4 formed in step 6 is a regular hexagon, (1) in FIG.
As shown in the figure, the under-expanded state where the cell 4 has a vertically long shape and has not yet reached the regular expansion (expansion of about 50%)
As shown in FIG. 8 (2), it is conventionally practiced to change the expansion ratio variously between the overexpansion state (expansion of about 115%) in which the shape of the cell 4 is horizontally long. (In practice, 70% to 90% of extension was used in practice). Conventionally, the buffer honeycomb cores 1 and 2 obtained by changing the expansion rate without depending on the normal expansion as described above.
Has responded to various demands for buffer performance, large and small.

[0006]

The following problems have been pointed out in such a conventional example. First
In addition, since the conventional honeycomb cores 1 and 2 for cushioning change the cushioning performance in a large or small manner, they are in an under-expanded state or an over-stretched state that does not reach a general regular extension.
As shown in (1) and (2) of
It has been pointed out that the width B perpendicular to the (extension direction) is not constant. That is, the conventional cushioning honeycomb cores 1 and 2 are in an under-expanded state that does not reach the normal regular extension or an over-expanded state that is further extended from the regular extension in the manufacturing process. Therefore, in the under-expanded state or over-expanded state in which the regular expansion is not performed, the width B is undesired, for example, a wide width portion and a narrow width portion are mixed and become substantially meandering. There was a problem of becoming uniform.

Second, conventional cushioning honeycomb cores 1 and 2
Has pointed out the problem that the required buffer performance cannot be obtained. That is, FIGS. 8 (3) and 8 (4) are graphs in which the cushioning performance test is performed on the conventional cushioning honeycomb cores 1 and 2, and the buckling progress state due to the impact load, that is, the absorption and relaxation of the impact energy. It shows the situation over time.

First, as shown in FIG. 8 (3), in the conventional cushioning honeycomb cores 1 and 2, the undulating load Q after the high initial load P, which is an impact load, is not averaged. The fluctuation range of the shock absorbing performance with respect to the impact load was large, and the fluctuation range of the impact energy that could be absorbed and relaxed with time was large (see comparison of FIG. 7 (2), which will be described later). As described above, in the conventional cushioning honeycomb cores 1 and 2, due to the under-expanded state and the over-expanded state that do not reach the regular extension, the required cushioning performance cannot be stably and reliably obtained. There was a problem. Furthermore, due to the under-expanded state and over-extended state that do not reach the normal extension,
(4), the wavy load Q after the high initial load P follows an upward tendency or a downward tendency as shown in the figure,
In many cases, the shock absorbing performance against shock load gradually goes up or down, and the shock energy that can be absorbed or relaxed with time tends to gradually increase or decrease (see FIG. 7 described later). (See Figure (2) for comparison). The conventional cushioning honeycomb cores 1 and 2 also have a problem in that the required cushioning performance cannot be obtained stably and surely from this aspect.

The present invention has been made in view of such circumstances, and has been made in order to solve the problems in the conventional example.
In order to correspond to the required cushioning performance, the joint width between the cell walls was adjusted so that the standard width and the wide or narrow one were alternately located. Secondly, the required cushioning performance can be obtained, and thirdly, these can be realized easily and easily.
It is an object of the present invention to propose a buffer honeycomb core and a manufacturing method thereof.

[0010]

The technical means of the present invention for solving such a problem is as follows. First, claim 1 is as follows. That is, this claim 1
The cushioning honeycomb core is composed of a planar aggregate of hollow columnar cells partitioned and formed by the cell walls, and is used for cushioning due to the buckling of the cell walls. Then, in order to correspond to the magnitude of the required cushioning performance, with respect to the joint width between the cell walls, one having a standard width with respect to the cell size, and one having a width wider or narrower than the standard width, It is characterized in that the cells are set to be alternately located in the cell size direction.

Next, claim 2 is as follows. That is, according to the manufacturing method of claim 2, after the joining material is arranged on the base material in a linear shape, a plurality of the base materials are stacked in a positional relationship in which the joining materials are sequentially displaced by half a pitch. Then, after joining each other with the joining material, by applying a tensile force in the stacking direction to perform normal expansion, a planar aggregate of hollow columnar cells partitioned and formed by the cell wall, The present invention relates to a method for manufacturing a cushioning honeycomb core, in which a honeycomb core used for cushioning is obtained by buckling of the cell walls. Then, according to the above description, when the joining material is arranged on the base material in the form of a striation, the arrangement of the joining material becomes the joining width between the cell walls after the fact in order to correspond to the magnitude of the required cushioning performance. Regarding the installation width, there are prepared a cell having the same pitch but having a standard width with respect to the cell size, and a cell having a width wider or narrower than the standard width. Next, as described above, when stacking a plurality of base materials in a positional relationship in which the bonding materials are sequentially displaced by half a pitch, the bonding material has a standard width and a standard width. Wider or narrower ones are piled up so that they are sequentially positioned alternately.

Next, claim 3 is as follows. That is, according to the manufacturing method of the third aspect, the base material is folded into a corrugated plate in which corrugated irregularities are continuously bent and formed at a constant pitch by a corrugating device such as a gear and a gear or a gear and a rack. After bending, a plurality of corrugated plates are stacked and joined in a positional relationship in which the bottom and top of the corrugation of the waves are aligned with each other, and the flat surface of the hollow columnar cell partitioned and formed by the cell wall. The present invention relates to a method for manufacturing a cushioning honeycomb core, which is made of a porous aggregate and obtains a honeycomb core used for cushioning due to buckling of the cell walls. Then, first, according to the above, when the base material is bent into the corrugated plate by the corrugating apparatus, the joining width between the cell walls is formed afterwards in order to correspond to the magnitude of the required cushioning performance. Regarding the formation width of the bottom and top of the unevenness of the wave, which is the same pitch, the standard size and the wider or narrower than the standard size are alternately arranged with respect to the cell size. It is bent to be located at. Next, as described above, a plurality of corrugated sheets are laminated,
When joining, the bottoms and tops of the standard width are fitted together, and the bottoms and tops are wider or narrower than the standard width, and are laminated and joined in a positional relationship where they are fitted together. .

The cushioning honeycomb core of the first aspect is manufactured by the spreading method of the second aspect or the corrugating method of the third aspect. That is, according to claim 2, the arrangement width of the joining material, which is the joining width between the cell walls, is adjusted, and the standard width and the wider or narrower one are alternately positioned, and the stacking is performed. ，
Manufactured by joining and normal expansion. Further, in claim 3, the width of the bottom or top of the corrugated sheet forming the joint width between the cell walls is adjusted so that the standard width and the wider or narrower one are alternately arranged. It is manufactured by bending it to position it, stacking it, and joining it. Therefore, in this cushioning honeycomb core, the joint width between the cell walls is adjusted to meet the required cushioning performance, and when a shock load exceeding the compressive strength is applied in the cell axial direction, the cell walls buckle. It exerts a shock-absorbing performance corresponding to an impact load, and reliably absorbs and absorbs impact energy.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments of the invention shown in the drawings. 1 and 4 are provided for explaining the embodiment of the present invention, and FIGS.
5 and 6 are provided for explaining a general example which is a premise thereof, and FIG. 7 is provided for explaining the buffering performance.

That is, FIG. 1 is a front explanatory view for explaining an embodiment of the invention by a spreading method. (1) is an example of a cushioning honeycomb core, and (2) is a main part thereof. , (3) is another example of the buffer honeycomb core, (4)
The figure shows the main part. 2A and 2B are perspective explanatory views for explaining a method for manufacturing a honeycomb core by a general spreading method. FIG. 2A is a base material preparing step, FIG. 2A is a cutting step, and FIG. The bonding material arranging step, (4), the stacking step, and (5), the expanding step. FIG. 3 shows the general honeycomb core obtained by explaining the manufacturing method,
FIG. 1 (1) is a front explanatory view, FIG. 2 (2) is a front explanatory view of a main portion thereof, and FIG. 3 (3) is a perspective view.

FIG. 4 is a front explanatory view for explaining an embodiment of the invention by the corrugation method. (1) is an example of the corrugated plate, and (2) is the obtained buffer honeycomb core. Fig. 3 (3) shows another example of the corrugated sheet, and Fig. 4 (4) shows another example of the obtained cushioning honeycomb core. FIG.
[Fig. 1] Fig. 1 is a front explanatory view for explaining a method for manufacturing a honeycomb core by a general corrugation method, in which (1) is a base material preparing step, (2) is a corrugated sheet forming step, and (3) is a formed sheet. Figure 4 shows the corrugated sheet stacking and joining process. FIG. 6 is a front explanatory view for explaining the manufacturing method,
The figure (1) shows a corrugated plate, the figure (2) shows a flat plate, and the figure (3) shows the obtained general honeycomb core. FIG. 7 is used to explain the cushioning performance due to buckling. (1) is an explanatory diagram of the state before and after the cushioning by the honeycomb core, and (2) is a graph thereof.

First, the spreading method will be described. Before describing the spreading method of the present invention, referring to FIG. 2 and FIG.
A method of manufacturing the honeycomb core 5 by a general spreading method will be described. In the manufacturing method by the spreading method of this general example, after arranging the joining material 7 on the base material 6 in a linear shape, a plurality of base materials 6 are stacked in a positional relationship in which the joining materials 7 are displaced by half a pitch. Then, after joining them with the joining material 7, a tensile force is applied in the stacking direction to carry out the normal expansion, so that the planar assembly of the hollow columnar cells 4 partitioned by the cell wall 3 is formed. As a result, the honeycomb core 5, which is also used for cushioning due to the buckling of the cell walls 3, is manufactured.

The general manufacturing method by the spreading method will be described in more detail. As the base material 6, aluminum foil or other metal foil or fiber reinforced plastic sheet (FR
P sheet), craft paper, aramid paper and other special paper,
A variety of sheet-shaped metals and non-metals such as vinyl chloride sheets and other plastic sheets, and other organic and inorganic composite material sheets are used. Then, first, the base material 6 prepared as shown in FIG. 2 (1) is cut into predetermined dimensions as shown in FIG. 2 (2), and at the same time as shown in FIG. 2 (3).
As shown in the figure, a bonding material 7 such as an adhesive is applied in a striation form by coating or the like. An adhesive is typically used as the joining material 7, but a brazing material containing solder can also be used. In any case, the joining material 7 has a predetermined arrangement width, pitch, and They are arranged in parallel at intervals.

Then, as shown in FIG. 2 (4), a plurality of such base materials 6 are bonded to each other and a bonding material 7 is provided.
Are stacked vertically one on top of another in a positional relationship that is laterally shifted by half a pitch. Then, by heating and pressing to melt and cure the bonding material 7, the stacked base materials 6 are bonded by adhesion or the like. Then, as shown in FIG. 2 (5), after cutting such a block body of the base material 6 into pieces each having a predetermined wall thickness, a tensile force is applied with the upper and lower stacking directions A as the expanding direction. Expand. Therefore, as shown in each drawing of FIG. 3, the cell wall 3 is formed of the bent base material 6, and the cell wall 3 is formed of a planar assembly of hollow columnar cells 4 partitioned and formed. The honeycomb core 5 is manufactured.

As described above, in the conventional general spreading method, as shown in FIG. 2 (3), when the joining material 7 is arranged on the base material 6 in a linear shape, the joining material 7 is used. The arrangement widths of all were the same and constant. That is, as shown in (2) of FIG. 3 and the like, the bonding width between the cell walls 3 of the honeycomb core 5 is formed after the fact that the bonding width of the bonding material 7 is equal to the cell size D. According to the standard width, the arrangement width C was unified. Therefore, by using the base material 6 in which the bonding material 7 is arranged in a linear shape with the arrangement width C of the standard width as described above, the conventional honeycomb core 5 has a bonding width between the cell walls 3. However, the arrangement width C having such a standard width is unified. The arrangement width C of such standard width is, for example, 5.4 mm when the cell size D is 9.5 mm (3/8 inch),
When the cell size D is 12.7 mm (1/2 inch), it is 7.2 mm, and the cell size D is 19.1 mm (3/4 inch).
In the case of, it is set to 10 mm. (Note that, when the honeycomb core 5 which is more general than the conventional one is used for cushioning, it exhibits a certain cushioning performance as shown by the solid line in FIG. 7B, for example.)

On the other hand, the manufacturing method of the buffer honeycomb core 8 of the present invention is as follows. That is, as shown in FIG. 1, in the spreading method of the present invention, first,
As described above, when the joining material 7 is arranged on the base material 6 in a linear shape, the cell wall 3 is post-processed so as to correspond to the required shock absorbing performance.
Regarding the arrangement width of the joining material 7 which is the joining width between the two, although the pitch is the same, the arrangement width C of the standard width and the arrangement width C of the standard width are compared with respect to the cell size D. A wide disposition width E or a narrow disposition width F is prepared.

That is, in the example shown in FIGS. 1 (1) and 1 (2), a plurality of base materials 6 on which the bonding material 7 is arranged with the standard arrangement width C and the base material 6 are formed. For example, two types of the base width 6 having a narrow width F, for example, about half the standard width C, and a plurality of base materials 6 on which the bonding material 7 is arranged at the same pitch are prepared. It Further, in the example shown in FIGS. 1 (3) and (4), a plurality of base materials 6 on which the bonding material 7 is arranged with the standard arrangement width C and the standard wide area C are provided. The width E is about 1.5 times as large as the width C, and two kinds of base materials 6 having the bonding material 7 arranged at the same pitch are prepared. It Instead of this, the following base material 6 may be prepared. That is, regarding the example shown in FIGS. 1A and 1B, the bonding material 7 having the standard width of the arrangement width C and the bonding material 7 having the narrow arrangement width F are
It is also possible to prepare a plurality of one type of base material 6 arranged so as to be alternately positioned in the left-right direction at the same pitch. Similarly, regarding the example shown in FIGS. 1 (3) and (4), the bonding material 6 having the standard width C and the wide width E are used.
It is also possible to prepare a plurality of one type of base materials 6 arranged so that the bonding material 7 and the bonding material 7 are alternately arranged in the left-right direction at the same pitch.

Then, in the manufacturing method according to the spreading method of the present invention, the plurality of base materials 6 are joined to the bonding material 7 as described above.
When they are stacked in a positional relationship in which they are displaced by half a pitch, the bonding material 7
The arrangement width of C is the standard width, and (1) in FIG.
In the example of FIGS. 1 and 2, the arrangement width F is narrower than the arrangement width C of the standard width, but in the examples of FIGS. The arrangement width E, which is wider than the arrangement width C, is piled up so as to be alternately positioned. Thus, in the present invention, by adjusting the disposition width of the bonding material 7, as will be described later, it is possible to obtain the buffer honeycomb core 8 in which the bonding width between the cell walls 3 is adjusted to two types. Reach In addition, the cushioning honeycomb core 8 according to the spreading method of the present invention
Since the other points of the manufacturing method of (1) are the same as those of the general example of the seed spreading method described above, the description thereof will be omitted. This is how the spreading method works.

Next, the corrugated method will be described. First, before describing the corrugating method of the present invention, FIG.
A manufacturing method of the honeycomb core 5 by a general corrugating method will be described with reference to FIG. In the manufacturing method by the corrugated method of this general example, first, the base material 6 is continuously bent and formed at a constant pitch in a corrugated molding device 9 such as a gear and a gear or a gear and a rack. The corrugated plate 10 is bent. Then, a plurality of corrugated sheets 10 are staggered by a half pitch of the wave, and stacked and joined in a positional relationship in which the bottoms and tops of the corrugations of the waves are aligned with each other, whereby the corrugated plates 10 are partitioned and formed. A honeycomb core 5 which is made of a planar aggregate of hollow columnar cells 4 and which is also used as a buffer due to the buckling of the cell walls 3 is manufactured.

The general manufacturing method by the corrugation method will be described in more detail. As the base material 6, various sheet-like metals or non-metals are used in accordance with the above-described description regarding the spreading method. Then, first, the base material 6 prepared as shown in FIG. 5 (1) is supplied to the corrugating apparatus 9 composed of a pair of upper and lower racks as shown in FIG. 5 (2). Then, the corrugated plate 10 shown in FIG. 5C is bent by heating and pressurizing. As the corrugation forming device 9, in addition to a pair of racks as shown in the figure, a device using a pair of gears and racks, gears and gears, a press mechanism, and various other devices are used. Corrugated sheet 10
In addition to the trapezoidal shape shown in the drawing, wave irregularities of substantially triangular shape, quadrangular shape, and other various shapes have a predetermined formation width, pitch, and height, and are linear in the lateral direction, parallel, and continuous in the longitudinal direction. It is formed by repeatedly bending.

Then, after the plurality of corrugated plates 10 thus bent are cut into a predetermined length, as shown in FIG. 5 (4), a bonding material 7 such as an adhesive is used. While interposing, the layers are sequentially shifted laterally by a half pitch of the wave, and stacked in a positional relationship in which the bottom and top are vertically aligned. After that, by heating the corrugated sheets 10 laminated in a block shape in which there is a space as a whole, the joining material 7 is melted and hardened, and thus the corrugated sheets 10 are joined together so that the bottom portion and the top portion are combined. Join between. In this way, the honeycomb core 5 is manufactured in which the cell walls 3 are formed by the corrugated plates 10 and the planar aggregates of the hollow columnar cells 4 partitioned by the cell walls 3 are formed. The honeycomb core 5 shown in FIG. 6 is different from the honeycomb core 5 shown in FIG. 5 (4) described above, and the corrugated plate 10 bent as described above and FIG. 6 (2) are used. With the flat plate 11 shown in the figure, when laminating the corrugated plates 10 as shown in FIG. 6 (3), the flat plate 11 is further interposed and bonded between the corrugated plates 10. It is shown.

As described above, in the conventional corrugating method, the corrugated sheet 1 is formed from the base material 6 by the corrugating apparatus 9.
At the time of bending processing to 0, the widths of the bottom and the top of the corrugated surface were all the same and constant. That is, as shown in FIG. 5 (3), FIG. 6 (1), etc., the wave width of the corrugated plate 10 that will form the bonding width between the cell walls 3 of the honeycomb core 5 after the fact. The width of formation of the bottoms and tops of the unevenness was standardized to the standard width of formation G according to the cell size D. Therefore, by using the corrugated plate 10 having the bottom and the top formed with the standard width G as described above, as shown in FIG. 5 (4) and FIG. 6 (3). ,
In the conventional honeycomb core 5, the joint width between the cell walls 3 is also unified to the formation width G having such a standard width. The specific dimensions of the standard width forming width G are the same as those indicated as the standard width disposition width C in the above-described spreading method.

On the other hand, the manufacturing method of the buffer honeycomb core 8 of the present invention is as follows. That is, as shown in FIG. 4, in the corrugated method of the present invention,
First, when the base material 6 is bent into the corrugated sheet 10 by the corrugation forming device 9 as described above, the joining width between the cell walls 3 is formed after the fact so as to correspond to the required buffer performance. The formation widths of the bottom and top of the corrugated wave are the same pitch, but the formation width G of the standard width with respect to the cell size D and the formation width wider than the formation width G of the standard width. The one having H or the one having a narrow forming width J is bent so as to be alternately positioned in the left-right direction. That is, in the example shown in FIG. 4 (1), the bottom and top of the corrugation of the wave have a standard width G and a standard width G of, for example, about half of the standard width G. With narrow formation width J,
Corrugated sheets 10 that are alternately positioned are prepared. Further, in the example shown in FIG. 4C, the bottom and top of the corrugation of the wave have a standard width of the formation width G, and the standard width of the formation width G is, for example, 1.5. A corrugated sheet 10 having a forming width H which is about twice as wide as the corrugated sheet 10 is sequentially arranged. Of course,
The corrugated forming device 9 has its gears, racks, and other irregularities adjusted to bend the corrugated plate 10.

Then, in the manufacturing method by the corrugation method of the present invention, when a plurality of corrugated sheets 10 are laminated and joined as described above, the corrugated sheets 10 are sequentially laminated in a reversed relationship. It Therefore, the bottoms and tops of the standard width forming width G are aligned, and in the example of FIG. 4B, the bottom and top of the forming width J narrower than the standard width forming width G. In the example of FIG. 4 (4), the positions are such that the bottom and top of the forming width H wider than the standard forming width G are laminated and bonded. To be done. In this way, in the present invention, the cell wall 3 is adjusted by adjusting the formation width of the bottom and the top of the wave, as will be described later.
Thus, the cushioning honeycomb core 8 in which the bonding width between the two is adjusted can be obtained. Note that, regarding the manufacturing method of the cushioning honeycomb core 8 by the corrugation method of the present invention, other points are the same as the general example of the corrugation method of this kind described above, and therefore the description thereof is omitted. This is the case with the corrugated method.

The cushioning honeycomb core 8 of the present invention is manufactured by such a spreading method or corrugating method. That is, as shown in the drawings of FIG. 1 and the drawings (2) and (4) of FIG. 4, the buffer honeycomb core 8 is formed of the hollow columnar cells 4 defined by the cell walls 3. It is made of a planar aggregate and is used for cushioning due to buckling of the cell wall 3, but the cell wall 3 is required to meet the required level of cushioning performance.
Regarding the junction width between the cells, a standard width with respect to the cell size D and a wider or narrower width than the standard width are set so as to be alternately positioned in the cell size D direction.

When the required cushioning performance is small, the cushioning honeycomb core 8 is constructed as follows.
First, in the buffer honeycomb core 8 manufactured by the spreading method, the arrangement width of the bonding material 7 is adjusted as shown in FIGS. 1 (1) and 2 (2). That is, the arrangement width C of the standard width and the arrangement width of the narrow width F are alternately combined, and thus the joint width between the cell walls 3 is adjusted, and the joint width of the standard width and the narrow width are adjusted. The joining width is composed of the cushioning honeycomb cores 8 that are alternately combined. Of course, the specific dimensions of the narrow disposition width F and the joint width are set in accordance with the specific degree of the required small cushioning performance.

When the required cushioning performance is small, the cushioning honeycomb core 8 manufactured by the corrugation method has a wave structure as shown in FIGS. 4 (1) and 4 (2). The formation width of the bottom and top of the corrugated surface of the plate 10 is adjusted. That is, the standard forming width G and the narrow forming width J are alternately combined, and thus the joint width between the cell walls 3 is adjusted, so that the standard joint width and the narrow joint width are The honeycomb cores 8 for cushioning are alternately combined. Of course,
The specific dimension of the narrow forming width J is set in accordance with the specific degree of the required small cushioning performance. When the required cushioning performance is small, the cushioning performance is represented by an imaginary line in FIG. 7 (2) described later.

On the other hand, when the required cushioning performance is large, the cushioning honeycomb core 8 is constructed as follows. First, in the buffer honeycomb core 8 manufactured by the spreading method, the arrangement width of the bonding material 7 is adjusted as shown in FIGS. 1 (3) and (4). That is, the standard width of the arrangement width C and the wide width of the arrangement width E are alternately combined, so that the joint width between the cell walls 3 is adjusted,
The standard width of the bonding width and the wide bonding width are composed of the cushioning honeycomb cores 8 that are alternately combined. The wide arrangement width E and the specific dimensions of the joint width are set in accordance with the specific degree of the required large cushioning performance.

When the required cushioning performance is small, the cushioning honeycomb core 8 manufactured by the corrugation method has a wave structure as shown in FIGS. 4 (3) and 4 (4). The formation width of the bottom and top of the corrugated surface of the plate 10 is adjusted. That is, the standard forming width G and the wide forming width H are alternately combined, and thus the joint width between the cell walls 3 is adjusted, and the standard width and the wide joint width are The honeycomb cores 8 for cushioning are alternately combined. The specific dimension of the wide formation width G is set according to the specific degree of the required large cushioning performance. When the required cushioning performance is large, the cushioning performance is represented by a broken line in FIG. 7 (2) described later.

Now, such a cushioning honeycomb core 8
In the same manner as the general honeycomb core 5 (see each drawing of FIG. 3, FIG. 5 (4), FIG. 6 (3), etc.), each is divided into independent spaces by the cell wall 3. , A flat aggregate of a large number of hollow columnar cells 4. The cell wall 3 and the cell 4 typically have a hexagonal cross-sectional shape, but may have a trapezoidal shape, a triangular shape, a quadrangular shape, or other various shapes.
The cushioning honeycomb core 8 is excellent in cushioning performance and is also excellent in weight ratio strength like the general honeycomb core 5 and is lightweight and has high rigidity / strength. It also has the characteristics of excellent heat insulation and sound insulation.

The present invention is constructed as described above. Then it becomes as follows. The cushioning honeycomb core 8 is manufactured by the spreading method shown in FIG. 1 and others and the corrugated method shown in FIG. 4 and others. That is, in the spreading method, the arrangement width of the joint material 7 to the base material 6 which is the joint width between the cell walls 3 is adjusted so that the cell size D has the arrangement width C of the standard width and the standard width. The arrangement width E is wider than the arrangement width C of
The cushioning honeycomb core 8 is manufactured by alternately laying ones or ones having a narrow disposition width F, and stacking, joining, and normally stretching (100% stretching). Further, in the corrugated method, the joint width between the cell walls 3 is formed,
The formation width of the bottom or top of the corrugated plate 10 is adjusted so that the cell size D has a formation width G of a standard width, and a formation width H wider than the formation width G of the standard width or a narrow formation. Width J
And corrugated sheets 10 are bent so as to be alternately positioned, and laminated and joined to form a buffer honeycomb core 8
Is manufactured.

Therefore, in the thus-fabricated cushioning honeycomb core 8, the bonding width between the cell walls 3 is adjusted to meet the required cushioning performance, and the standard width is
The wider ones and the narrower ones alternate.
Therefore, as shown in FIG. 7 (1), the cushioning honeycomb core 8 receives an impact load L exceeding the compressive strength in the cell axis direction K (see also FIG. 3 (3)). The cell wall 3 buckles M to exert the required cushioning performance corresponding to the impact load L, and reliably absorbs and alleviates the impact energy. The cushioning honeycomb core 8 of the illustrated example is used as a honeycomb panel in which a surface plate 12 is adhered to the opening end surface thereof, and such honeycomb panels are stacked in a multi-layer structure (upper and lower layers in the illustrated example) to provide an impact load. L is added from top to bottom along the cell axis direction K. Now, this cushioning honeycomb core 8 is, for example, such a honeycomb panel, and is attached to it in order to protect loads and other objects from the impact load L.

FIG. 7 (2) is a graph showing the buffer performance test of the buffer honeycomb core 8 of the present invention and the normally expanded honeycomb core 5 of the present invention. The state of progress of buckling M, that is, the state of absorption and relaxation of impact energy is represented over time. First, as shown by the solid line in the figure, the general honeycomb core 5 is first subjected to a high initial load P, which is a shock load L exceeding its compressive strength, and then a wavy load L, which is a lower average value. When the cell wall 3 is fully buckled M at the end, it rises to the final load R which is a high impact load L again. On the other hand, in the cushioning honeycomb core 8 of the present invention, the undulating load Q in the middle is larger than that of the general honeycomb core 5 described above in accordance with the required size of the cushioning performance. It is set to change with a high average value as shown by the middle broken line display or a low average value as with the imaginary line display in the figure.

Now, in this cushioning honeycomb core 8 and the manufacturing method thereof, the following first, second and third steps are performed. First, the cushioning honeycomb core 8 is manufactured by a general normal stretching (100% stretching) spreading method or a corrugation method, and is the same as the cushioning honeycomb cores 1 and 2 of the conventional example of this kind described above. (Refer to (1) and (2) in FIG. 8) In order to obtain the required cushioning performance, under-expanded state that does not reach normal expansion (for example, about 50% expansion)
In other words, it does not mean that the over-expansion state (for example, about 115% expansion) is set. Therefore, as in the cushioning honeycomb cores 1 and 2 of this type of conventional example, the stacking direction A and the width B that is perpendicular to the spreading direction are non-uniform, and a wide portion and a narrow portion are mixed ((in FIG. 8). See (1) and (2)). As described above, according to the present invention, the buffer honeycomb core 8 having the uniform width B can be obtained.

Secondly, the cushioning honeycomb core 8 is manufactured by the general expansion method (normal expansion (100% expansion)) or the corrugated method, as in the case of the above-mentioned first embodiment, and the conventional cushioning method of this type is used. Unlike the honeycomb cores 1 and 2, the under-expanded state or the over-expanded state that does not reach the normal extension is not obtained. Therefore, due to these factors, the fluctuation range of the cushioning performance becomes large, and the cushioning performance does not follow the upward tendency or the downward tendency (see FIGS. 8 (3) and 4 (4)). The impact energy is stably and reliably absorbed and relaxed, such as accurately responding to the magnitude of the buffering performance to be performed at all times, and the undulating load Q moves at an average value (see FIG. 7 (2)). Like In other words, the required cushioning performance is about 0.21 MPa (2.1 kg / cm ² ) (30
Psi), about 0.31 MPa (3.2 kg / cm ² ) (45
Psi), about 0.38 MPa (3.9 kg / cm ² ) (55
Various crash strengths such as Psi) are conceivable, and it becomes possible to correspond to each of these accurately. Thus, according to the present invention, without changing the material, wall thickness, cell size D, etc. of the base material 6,
Even under the precondition that these are not changed, the cushioning honeycomb core 8 having stable and reliable cushioning performance can be obtained.

Thirdly, such a cushioning honeycomb core 8 can be easily and easily manufactured by utilizing a conventional spreading method or corrugating method. That is, in the spreading method, as shown in FIG. 1, the disposition width of the bonding material 7 to the base material 6 is a disposition width C having a standard width and a wide disposition width E or a narrow disposition width F. The cushioning honeycomb core 8 can be obtained by simply adjusting the above-mentioned conditions and applying the other general spreading method.
In the corrugated method, as shown in FIG.
By adjusting the formation width of the corrugation of the wave to a standard formation width G and a wide formation width H or a narrow formation width J, the other is applied by a general corrugated method for buffering. The honeycomb core 8 is obtained.

[0042]

As described above, the cushioning honeycomb core and the method for manufacturing the same according to the present invention adjust the bonding width between the cell walls to meet the required cushioning performance, and the standard width By arranging an object and a wide object or a narrow object alternately, the following effects are exhibited.

First, a buffer honeycomb core having a uniform width can be obtained. That is, since this cushioning honeycomb core is manufactured by the expansion method by normal expansion or the corrugated method,
Unlike the above-mentioned conventional example of this kind, due to the under-expanded state or the over-expanded state that does not reach the normal extension, the wide portion and the narrow portion are not mixed and the width is not uneven. A uniform width can be obtained.

Secondly, with this cushioning honeycomb core, the required cushioning performance can be stably and reliably obtained.
That is, since this cushioning honeycomb core is manufactured by the expansion method by the normal expansion or the corrugated method, it is caused by the under-expanded state or the over-expanded state that does not reach the normal extension as in the conventional example of this kind described above. The fluctuation range of the cushioning performance does not become large, and the cushioning performance does not follow an upward trend or a downward trend. As a result, stable and reliable shock absorbing performance can be obtained such that the impact energy is also absorbed and relaxed in a stable and reliable manner.

Third, and yet they are easily implemented. In other words, this cushioning honeycomb core is formed by a spreading method in which the width of the bonding material is standard, and the width is wide or narrow, or the formation width of the bottom and the top of the corrugation of the wave is standard. By the corrugating method which is wide and wide or narrow, and by applying the general spreading method and corrugating method, it can be easily and easily manufactured at high cost. As described above, the effects exhibited by the present invention are remarkable and large, for example, all the problems existing in this type of conventional example are solved.

[Brief description of drawings]

FIG. 1 is a front explanatory view for explaining a cushioning honeycomb core according to the present invention and a method for manufacturing the same, according to an embodiment of the invention by a spreading method, and FIG. 1 (1) is an example of the cushioning honeycomb core. , (2) shows the main part, (3)
The figure shows another example of the cushioning honeycomb core, and (4) shows the main part thereof.

2A and 2B are perspective explanatory views for explaining a method for manufacturing a honeycomb core by a general spreading method, in which FIG. 1A is a base material preparing step, FIG. 2B is a cutting step, and FIG. The bonding material arranging step, (4), the stacking step, and (5), the expanding step.

[Fig. 3] Fig. 3 shows a general honeycomb core obtained by explaining the manufacturing method, wherein Fig. 1 (1) is a front explanatory view, Fig. 2 (2) is a front explanatory view of a main portion thereof, and Fig. 3 (3) is a drawing. It is a perspective view.

FIG. 4 is a front explanatory view for explaining the embodiment of the invention by the corrugation method, regarding the buffer honeycomb core and the method for manufacturing the same according to the present invention. (1) FIG. FIG. (2) shows one example of the obtained cushioning honeycomb core, (3) shows another example of the corrugated plate, and (4) shows another example of the obtained cushioning honeycomb core.

5A and 5B are front explanatory views for explaining a method for manufacturing a honeycomb core by a general corrugation method, in which (1) is a base material preparing step, (2) is a corrugated sheet forming step, and (3) is a sectional view. The figure shows the formed corrugated sheet, and (4) shows the steps of laminating and joining the corrugated sheets.

FIG. 6 is a front view for explaining the manufacturing method,
The figure (1) shows a corrugated plate, the figure (2) shows a flat plate, and the figure (3) shows the obtained general honeycomb core.

FIG. 7 is a view for explaining the cushioning performance due to buckling. (1) is an explanatory diagram of a state before and after cushioning by a honeycomb core, and (2) is a graph thereof.

FIG. 8 (1) is a plan explanatory view of an example of a conventional cushioning honeycomb core, and FIG. 8 (2) is a plan explanatory view of another example of a conventional cushioning honeycomb core; FIG. 4 is a graph showing an example of the cushioning performance due to the buckling, and FIG. 4 (4) is a graph showing another example of the cushioning performance.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Buffered honeycomb core (conventional example) 2 Buffered honeycomb core (conventional example) 3 Cell wall 4 Cell 5 Honeycomb core 6 Base material 7 Bonding material 8 Buffering honeycomb core (of the present invention) 9 Corrugated molding Device 10 Corrugated plate 11 Flat plate 12 Surface plate A Stacking direction B Width C Arrangement width of standard width D Cell size E Wide arrangement width F Narrow arrangement width G Forming width of standard width H Wide forming width J Narrow formation Width K Cell axial direction L Impact load M Buckling P Initial load Q Wavy load R Final load

Claims (3)

[Claims] 1. A honeycomb core, which comprises a planar aggregate of hollow columnar cells partitioned and formed by cell walls, and is used for cushioning due to buckling of the cell walls. In order to comply with the above, regarding the joint width between the cell walls, a standard width with respect to the cell size and a wider or narrower width than the standard width should be alternately located in the cell size direction. Be set,
A cushioning honeycomb core characterized by: 2. After arranging the joining material in a striation form on the base material, a plurality of the base materials are stacked on each other in a positional relationship in which the joining materials are sequentially displaced by half a pitch to form the joining material. After joining together with each other, a tensile force is applied in the stacking direction to perform normal extension to form a planar aggregate of hollow columnar cells partitioned and formed by the cell wall, and the buckling of the cell wall In the method for manufacturing a honeycomb core for cushioning, which obtains a honeycomb core used for cushioning according to the above, first, according to the above, when the joining material is arranged in a striation shape on the base material, it is possible to cope with the magnitude of the cushioning performance required. Therefore, with regard to the disposition width of the joining material, which will be the joining width between the cell walls after the fact, although the pitch is the same, the standard size with respect to the cell size and the wider size than the standard size or Narrow one is prepared, and then by the above, the plurality of base materials are sequentially joined by half the joining material. When stacking in a positional relationship that shifts by chi, the stacking width of the bonding material with a standard width and one with a wider or narrower than the standard width are stacked alternately in order. To be done,
A method for manufacturing a cushioning honeycomb core, comprising: 3. A corrugated forming device for gears and gears, or gears and racks, etc. By laminating and joining the corrugated sheets in a positional relationship of aligning the bottom and top of the corrugation of the waves with each other, a planar aggregate of hollow columnar cells partitioned by the cell wall is formed, In a method for manufacturing a buffer honeycomb core, which obtains a honeycomb core used for buffering by buckling of the cell walls, first, when the base material is bent into the corrugated plate by the corrugating apparatus as described above, The width of the corrugated bottoms and tops that will form the joint width between the cell walls after the fact, in order to correspond to the size of the required buffer performance, is the same pitch, but standard for the cell size. Of standard size and standard size When a wide as or narrow and is processed bent to sit in sequentially and alternately, then the above, of stacking a plurality of the corrugated plates, bonding,
The cushioning honeycomb core is characterized in that the bottoms and tops of a standard size are fitted together, and the bottoms and tops are wider or narrower than the standard size so that they are stacked and joined together. Manufacturing method.