JPH04246530A - Reinforcing method for honeycomb panel - Google Patents

Abstract

PURPOSE:To enable a honeycomb panel to be reinforced, while first, reinforcing operation is carried out easily by less working time and less working man hours, second, the reinforcement may be optionally achieved at even the peripheral edge part or the central part of the honeycomb panel, third, the additional reinforcement after its manufacture is easy and fourth, the unevenness on a surface plate hardly occur. CONSTITUTION:In the reinforcing method for a honeycomb panel 1, first, the injection nozzle 6 provided with a prescribed injection hole 10 is inserted into the honeycomb core 2 from the end surface thereof, and the reinforcing material 11 such as adhesive, putty and foam, etc., is injected from the injection hole 10, whereby the reinforcing material is injected into each cell 8 of the position A which necessitates the reinforcement. The position A necessitating the rein forcement of the honeycomb 1 is reinforced by post-cured reinforced material 11.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reinforcing honeycomb panels. That is, the present invention relates to a honeycomb panel reinforcing method for reinforcing the portions that require reinforcement in a honeycomb panel formed by attaching face plates to both sides of a honeycomb core.

0002

[Prior Art] Honeycomb panels have a weak point in that they are susceptible to concentrated loads because the honeycomb core that forms the core material is a planar assembly of a large number of hollow columnar cells, and when left as is, they are susceptible to concentrated loads. This had the disadvantage that other members could not be firmly attached. Therefore, when loads are concentrated on the honeycomb core or when other members are attached, reinforcement of the honeycomb core has generally been performed. FIG. 3 is a perspective view illustrating a method for reinforcing the honeycomb panel 1 according to Conventional Example 1. In this conventional example 1, first, as shown in FIG. 3 (1), in the honeycomb panel 1 after manufacture, the honeycomb core 2 at the portion A that requires reinforcement is cut out and removed from the lateral direction, that is, from the end surface side using a cutter or the like. , forming a notch 3. And then,
As shown in FIG. 3 (2), a reinforcing block 4, which is an insert member made of aluminum, wood, etc., is inserted into the notch 3, or putty or the like (not shown) is filled. As a result, the portion A of the honeycomb panel 1 that requires reinforcement was reinforced. In addition, 5 in the figure is a surface plate. Further, FIG. 4 is a perspective view for explaining a method for reinforcing the honeycomb panel 1 according to Conventional Example 2. In this conventional example 2, when manufacturing the honeycomb panel 1, that is, when attaching the surface plate 5 to the honeycomb core 2,
Regarding honeycomb core 2 at point A that requires reinforcement at the same time,
Either form a notch 3 and insert a reinforcing block 4, etc., or
Alternatively, by filling each cell with putty or the like, the honeycomb panel 1 was reinforced at a location A that required reinforcement.

0003

[Problems to be Solved by the Invention] However, in such a conventional example, the following problem has been pointed out. first,
In the conventional example 1 in which reinforcement is performed after manufacturing the honeycomb panel 1 shown in FIG. There was a problem in that the processing time and man-hours required for reinforcement were extremely long. Secondly, as in the example shown in FIG. 3, it is fine if the area A that requires reinforcement is located at the peripheral edge of the honeycomb panel 1, but if the area A that requires reinforcement is only at the center of the honeycomb panel 1 ( (see Fig. 4), it is difficult to cut out only the central part from the side, that is, from the end face side, and it is ultimately impossible to reinforce only the central part, which narrows the range of use of the honeycomb panel 1. was there.

Next, in the conventional example 2 in which the honeycomb panel 1 shown in FIG. Even if it is at the peripheral edge (see FIG. 3) or only at the center as in the example shown in FIG. 4, it is still possible to easily reinforce it. However, in this conventional example 2, reinforcement is performed at the same time as the honeycomb panel 1 is manufactured, so the portion A that requires reinforcement after the honeycomb panel 1 is manufactured.
If this occurs additionally, for example, if it becomes necessary to attach other parts for subsequent use, this cannot be handled. From this point of view, there was a problem that the range of use of the honeycomb panel 1 was narrowed. Second, in this conventional example 2, when the notch 3 is formed and the reinforcing block 4 etc. is inserted as described above, the notch 3 is formed in the same manner as in the above-mentioned conventional example 1. It has been pointed out that the reinforcing work is troublesome and requires a large amount of processing time and man-hours. Thirdly, on the other hand, in conventional example 2, when filling the cells with putty etc. as described above, there is no problem of troublesomeness and processing man-hours as described in the second example, but on the other hand, after the fact, that is, after reinforcement, the honeycomb core 2 When the surface plate 5 was attached to the surface plate 5, there was a problem in that unevenness was likely to occur on the surface plate 5. In other words, it is very difficult to accurately fill a predetermined amount of putty, etc. into each cell in the area A that requires reinforcement, and the surface of the filled putty, etc. is difficult to form a uniform and smooth surface. When it was attached, unevenness was likely to occur on the surface plate 5. As described above, a problem also occurred in terms of the quality of the honeycomb panel 1.

[0005] Such a point has been pointed out in the conventional example. In view of the above-mentioned circumstances, the present invention has been made to solve the above-mentioned problems of the conventional method.The present invention is made by inserting an injection nozzle equipped with a predetermined injection hole, and applying the reinforcing material to each location that requires reinforcement. Firstly, the reinforcing work is easy because it is injected into the cells, secondly it can be reinforced at both the peripheral edges and the center of the honeycomb panel, and thirdly, additional reinforcement after manufacturing is also possible. Fourth, an object of the present invention is to propose a method for reinforcing a honeycomb panel that is easy and, fourthly, causes almost no unevenness on the surface plate.

[0006]

[Means for Solving the Problems] The technical means of the present invention to achieve this object are as follows. That is, this method of reinforcing a honeycomb panel relates to a method of reinforcing a honeycomb panel in which a honeycomb core is used as a core material and surface plates are attached to both sides of the honeycomb core. After manufacturing the honeycomb panel,
First, an injection nozzle having injection holes at a predetermined interval corresponding to the size of the cells of the honeycomb core at least at its tip is inserted from the end surface side of the honeycomb core. Then, a flowable, post-hardening reinforcing material is injected from the injection hole into each cell located at a location requiring reinforcement, thereby reinforcing the location.

[0007]

[Operation] Since the present invention is comprised of such means, it operates as follows. In other words, in this method of reinforcing a honeycomb panel, an injection nozzle equipped with a predetermined injection hole is inserted from the end face side of the honeycomb core, and reinforcing material is injected from the injection hole into each cell at a location where reinforcement is required to reinforce the location. Therefore, it becomes as follows.

[0008] First, reinforcement can be performed simply by inserting an injection nozzle and injecting a reinforcing material, and there is no need to cut out the honeycomb core to form a notch, so the reinforcement work is easy. Second, since reinforcement is similarly performed by insertion and injection, reinforcement can be freely performed whether the area requiring reinforcement is at the peripheral edge of the honeycomb panel or only at the center. Thirdly, since reinforcement is performed in the same way, additional reinforcement is easy if a portion requiring reinforcement occurs after manufacturing the honeycomb panel. Fourthly, since reinforcement is performed after manufacturing a honeycomb panel by attaching a face plate to a honeycomb core, it is easy to inject a predetermined amount of reinforcing material, and there is almost no occurrence of unevenness on the face plate.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below based on embodiments shown in the drawings. FIG. 1 is a plan cross-sectional view of a honeycomb core 2 for explaining an embodiment of the present invention. FIG. 2 shows the details, (1) a front view of the entire honeycomb panel 1, (2) a plan view showing the injection nozzle 6, and (3) a plan view showing an enlarged main part of the injection nozzle 6. It is a diagram. This reinforcement method uses a honeycomb core 2 as a core material and has surface plates 5 on both sides.
The present invention relates to a method for reinforcing a honeycomb panel 1 by attaching a material to the honeycomb panel 1. The honeycomb core 2 is composed of a planar uniform amalgamation of a large number of regular hexagonal or other hollow columnar cells 8 formed by cell walls 7. and high strength to weight ratio, flatness accuracy, ease of molding,
These characteristics are known. The surface plate 5 is attached to both the upper and lower ends, which are the end faces of the cells 8, using an adhesive or the like.

[0010] In this reinforcing method, after manufacturing such a honeycomb panel 1, first, injection nozzles 6 are installed in at least the tip 9 of the honeycomb core 2, which are provided with injection holes 10 at predetermined intervals corresponding to the size of the cells 8 of the honeycomb core 2. is inserted into the honeycomb core 2 from the lateral direction, that is, from the end surface side. The injection nozzle 6 has a proximal end connected to a supply section of a reinforcing material 11 (described later) via a press-in pump (not shown), and has an injection hole 10 at a distal end 9, with a positional interval B ( The size of the cell 8 (see (3) in FIG. 2) substantially matches the size of the cell 8, that is, the cell size C (see FIG. 1). In the illustrated example, the injection hole 10 has two opposing holes.
They are formed as a pair of cells 8, and the number of each cell 8 in the longitudinal direction matches the number of cells 8 in the same direction of the point A that requires reinforcement, and in the illustrated example, three cells 8 are formed. The outer diameter D of the injection nozzle 6 (see figure (3) in FIG. 2) is approximately half or less of the thickness E of the honeycomb panel 1 (see figure (1) in FIG. 2). In the illustrated example, the tip of the injection nozzle 6 has an acute angle (see figures (2) and (3) in FIG. 2), and the tip of the injection nozzle 6 has an acute angle (see figures (2) and (3) in FIG. 2), and the tip of the injection nozzle 6 has an acute angle (see figures (2) and (3) in FIG. (Reference) Although it also functions as a forming material, it is of course possible to make the tip of the injection nozzle 6 not have an acute angle, but instead have a convex shape, for example, and to form the above-mentioned hole in the honeycomb core 2 in advance. 12 is formed using another aperture member, and the aperture 12 is subsequently formed.
An injection nozzle 6 having a convexly curved tip may be inserted from the inside.

Now, in this reinforcing method, a reinforcing material 11 having fluidity and post-curing is introduced from the injection hole 10 of the injection nozzle 6 into each cell 8 of the honeycomb core 2 located at the point A of the honeycomb panel 1 that requires reinforcement. to strengthen the area A. As such reinforcing material 11, adhesive, putty, foam material, etc. are used.

The present invention has been described above. Therefore, it becomes as follows. That is, in this method of reinforcing the honeycomb panel 1, first, the injection nozzle 6 having a predetermined injection hole 10 is inserted from the lateral direction, that is, from the end surface side of the honeycomb core 2 of the honeycomb panel 1. Then, by injecting reinforcing material 11 in the right angle direction from each injection hole 10 of the inserted injection nozzle 6, each cell 8 of the location A that requires reinforcement
The location A is reinforced with a reinforcing material 11 injected into the interior and post-cured. By being reinforced in this way, the weak points of the honeycomb panel 1, such as being weak against concentrated loads, are overcome, and the honeycomb panel 1 becomes sufficiently adaptable to cases where loads are concentrated, cases where other members are attached, etc. In the illustrated example, two injection nozzles 6 are used, and the part A that requires reinforcement is
The reinforcing material 11 is injected into each cell 8 at the point A where reinforcement is required, but of course, only one injection nozzle 6 is used instead of this illustrated example. The reinforcing material 11 may be injected by sequentially inserting the reinforcing material 11 into the reinforcing material 11. Furthermore, the reinforcing material 11 may be injected at once by inserting the reinforcing material 11 in a short period of time by using a large number of injection nozzles 6, such as three or more. You can also do this.

Now, since the reinforcing method for the honeycomb panel 1 according to the present invention is performed in this manner, the following first, second, third, and fourth methods are used. First of all, reinforcement is performed only by inserting the injection nozzle 6 into the honeycomb core 2 and injecting the reinforcing material 11. As in the conventional example of this type, the honeycomb core 2 is cut out and the notch 3 (Fig. 3, 4), the reinforcing work is easy. Second, similarly, inserting the injection nozzle 6 into the honeycomb core 2 and reinforcing material 11
Since reinforcement is performed by injection of
Also when the is located at the peripheral edge of the honeycomb panel 1 (see Figure 3)
, even if it is located only in the center (see FIGS. 1 and 4), it can be reinforced as desired. Thirdly, since reinforcement is similarly performed by inserting the injection nozzle 6 into the honeycomb core 2 and injecting the reinforcing material 11, additional reinforcement is easy if a location A that requires reinforcement occurs after manufacturing the honeycomb panel 1. It is.

Fourthly, since reinforcement is performed after manufacturing the honeycomb panel 1 by attaching the surface plate 5 to the honeycomb core 2, reinforcing material 11 is applied to each cell 8 at the location A where reinforcement is required.
It is easy to inject a predetermined amount of the liquid, and there is almost no occurrence of unevenness on the surface plate 5. In other words, when manufacturing the honeycomb panel 1, as in the conventional example of this kind, it is necessary to perform the difficult work of accurately injecting a predetermined amount of reinforcing material 11 into each cell 8 of the honeycomb core 2 before the surface plate 5 is attached. Without this, the spaces already formed by the cells 8 and the surface plate 5 can be easily filled with the reinforcing material 11 even after manufacturing the honeycomb panel 1. In this case, the occurrence of unevenness on the surface plate 5 already bonded to the cell wall 7 forming the cell 8 is almost certainly prevented.

[0015]

[Effects of the Invention] As explained above, the method for reinforcing a honeycomb panel according to the present invention involves inserting an injection nozzle with a predetermined injection hole, and reinforcing the reinforcing material by injecting it into each cell at the location where reinforcement is required. Therefore, the following effects are achieved.

First, reinforcing work is easy. That is, there is no need to cut out the honeycomb core, and the machining time and man-hours required for reinforcement are significantly reduced. Second, it is possible to freely reinforce both the peripheral edges and the center. That is, even if the only part that requires reinforcement is the central part of the honeycomb panel, it can be easily reinforced, and the range of use of the honeycomb panel is expanded. Third, additional reinforcement after manufacturing is easy. In other words, if there is a point that requires additional reinforcement after manufacturing the honeycomb panel, for example, if it becomes necessary to attach other parts for subsequent use, it can be handled as appropriate, and from this point of view, the honeycomb panel The scope of use will expand. Fourth, there are almost no irregularities on the surface plate. That is, since reinforcement is performed after attaching the face plate to the honeycomb core, there is almost no occurrence of unevenness on the face plate, and the quality of the honeycomb panel is improved. As described above, the present invention has remarkable effects, such as eliminating all the problems of this type of conventional example at once.

[Brief explanation of the drawing]

FIG. 1 is a plan cross-sectional view of a honeycomb core for explaining an embodiment of a method for reinforcing a honeycomb panel according to the present invention.

FIG. 2 shows details of the same, (1) is a front view of the honeycomb panel, (2) is a plan view showing the injection nozzle, (
3) The figure is an enlarged plan view of the main parts of the injection nozzle.

FIG. 3 is a perspective view illustrating a method for reinforcing a honeycomb panel according to Conventional Example 1, in which (1) the diagram shows a stage in which a honeycomb core is cut out after manufacturing a honeycomb panel, and (2) a diagram showing a reinforcing block. The figure shows the stage where the

FIG. 4 is a perspective view for explaining a method for reinforcing a honeycomb panel according to Conventional Example 2, and shows a honeycomb panel reinforced during manufacturing.

[Explanation of symbols]

1 Honeycomb panel 2 Honeycomb core 3 Notch part 4 Reinforcement block 5　Surface plate 6 Injection nozzle 7 Cell wall 8 Cell 9 Tip 10 Injection hole 11 Reinforcement material 12 Opening A. Areas requiring reinforcement B Position interval C Cell size D　Outer diameter E Thickness

Claims (1)

[Claims] 1. A method for reinforcing a honeycomb panel comprising a honeycomb core as a core material and surface plates attached to both sides of the honeycomb panel, wherein after manufacturing the honeycomb panel, at least the tip portion is provided with a surface plate having a size corresponding to the size of the cells of the honeycomb core. An injection nozzle equipped with injection holes at corresponding predetermined intervals is inserted from the end face side of the honeycomb core, and a reinforcing material having flowability and post-hardening is applied to each cell located at a location requiring reinforcement through the injection holes. A method for reinforcing a honeycomb panel, comprising reinforcing the part by injecting into the honeycomb panel.