JP2001140362A - Method for filling insert - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for surely filling a space with an insert through a simple process. SOLUTION: In the method for filling the space with the insert, a panel is held in such a way that insert filling holes are located below the top of the space to be filled; and from one of the filling holes in the lowest position, the space to be filled is completely filled with a filler, and the filler is injected into the space to be filled until all the other filling holes are filled with the filler; and the filling hole used for injection is immediately closed by a closure member. When there are two filling holes, the panel is held in a vertical position so that the insert filling holes are aligned vertically or horizontally, and injection is carried out from either of the filling holes. An air-permeable tabular body such as perforated tape or cloth is affixed to the filling hole not used for injection.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert filling method for attaching an insert used for connecting another panel or other equipment to a panel, and more particularly to a sandwich sandwiching a honeycomb core between two skins. The present invention relates to an insert filling method for filling from a filling hole of an insert inserted into a panel.

2. Description of the Related Art A large number of structural sandwich panels are used in artificial satellites, and a large number of inserts are inserted into a sandwich panel in order to connect another panel to such a panel or to attach another device or component. Need to be fixed. In general, a penetration type insert is used for coupling between structures, and a stop type insert is generally used for attaching devices and components to a structure panel.

[0003]

2. Description of the Related Art FIG. 25 is a cross-sectional view of a penetrating insert embedded and fixed in a general sandwich panel, and FIG. 26 is a cross-sectional view of a blind insert embedded and fixed in a general sandwich panel. . The sandwich panel P has a structure in which a honeycomb core 2 is sandwiched between two skins 1 and has many cells 2a. FIG.
In the case of the penetration type insert shown in FIG. 5, an insertion hole 2b for inserting an insert is formed to penetrate the sandwich panel P, and the insert 5 is inserted into the insertion hole 2b. FIG.
In the case of the stop type insert, the insertion hole 2c for inserting the insert does not penetrate.

[0004] The insert 5 is, for example, a hollow cylindrical shaft portion 5.
a first flange portion 5b provided at one end of the shaft portion 5a and having a diameter larger than the insertion hole 2b; and a first flange portion 5b provided at the other end of the shaft portion 5a and having a diameter substantially equal to the insertion hole 2b. The second flange portion 5c desired on the opposite skin 1 through the inside
And have Since the flange portion 5b is larger than the insertion hole 2b, it comes into contact with the skin 1 and stops. Therefore, around the shaft portion 5a of the insert 5, the cells 2 of the honeycomb core 5
A filling space 5d communicating with a is formed. The flange portion 5b is provided with two filling holes 7 spaced apart in the radial direction.
d. One of the two filling holes 7 is for filling a filler, and the other is for venting air. Thus insert 5
Is inserted into the filling hole 7, a syringe (not shown) is inserted into one of the filling holes 7, and the filler 4 is injected into the filling space 5d and filled.

In the case of the stop type insert 6 shown in FIG. 26 as well, the insert insertion hole 2c is not penetrated.
The difference is that the flange portion 5c is in contact with the end face of the uncut honeycomb core 2 and is fixed with the adhesive 3, and the first flange portion 5b is flush with the skin of the sandwich panel 1. However, other points are the same as the structure of FIG.

[0006]

However, a honeycomb core used for a sandwich panel for space such as a structure of an artificial satellite or the like is provided with a small hole (not shown) for air release for adjusting the air pressure. In addition, there is a cell adjacent to an insert insertion hole (a prepared hole) for attaching an insert. For this reason, the insert 5 as described above
When the filler 4 is filled in the filling space 5d in the insert insertion hole 2b into which the insert 5 is inserted in the insert filling method performed to fix the filler 4 to the sandwich panel P, an air vent hole or the like is formed before the filler 4 hardens. It flows out to adjacent cells.

[0007] When such outflow of the filler occurs, a void portion without filler is generated in the completely filled filling space, and additional filling is performed to fill the void portion with the filler. The operation had to be repeated several more times. Therefore, the filling operation takes a long time, and the amount of the filler becomes unnecessarily large, so that the weight of the panel increases. Further, when the additional filling is not performed, there is a problem that the pull-out resistance of the insert is reduced.

Accordingly, an object of the present invention is to solve the above-described problems of the conventional insert filling method, and to provide an insert filling method capable of reliably filling a filling space with a filler in a simple process. It is.

[0009]

According to the present invention, there is provided a panel having a shaft in a thickness direction of a panel and a flange parallel to a main surface of the panel. In order to insert and fix the insert with multiple filling holes for filling the agent into the insert insertion hole of the sandwich panel sandwiching the honeycomb core with two skins, the filling space formed around the insert in the insert insertion hole An insert filling method for filling a filler, comprising: a step of holding a panel so that a filling hole of an insert is located below an uppermost part of a filling space; and a filling hole located at a lowest position of the panel. From one of the steps of injecting the filler into the filling space until the filling space is completely filled with the filler and all other filling holes are filled with the filler, Insert filling method comprising the step of closing immediately closing member the fill hole that use is obtained.

When the insert has two filling holes, the step of holding the panel includes the step of standing upright so that the two filling holes of the insert are arranged vertically, and the step of injecting the filler includes the step of filling the insert. A step of injecting from a lower filling hole may be provided.

The method may further comprise a step of attaching a tape to a filling hole on an upper side of the insert and a step of making a hole having a diameter of 0.2 to 0.5 mm in the tape before injecting the filler. .

[0012] Further, a step of attaching a breathable cloth to the filling hole on the upper side of the insert before the filling may be provided.

In the case where the insert has two filling holes, the step of holding the panel includes the step of standing upright so that the two filling holes of the insert are arranged side by side, and the step of injecting the filler is performed on one side of the insert. May be provided.

Further, before the injection, a step of attaching a tape to a filling hole on one side of the insert and a step of making a hole having a diameter of 0.2 to 0.5 mm in the tape may be provided.

[0015] Before the injection, a step of attaching a gas-permeable cloth to the filling hole on one side of the insert may be provided.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 to 4 show one embodiment of the insert filling method of the present invention. FIG.
2 and FIG. 2, the sandwich panel P and the insert 5 are the same as those shown in FIG. Therefore, although the description thereof will not be described in detail here, the insert 5 is provided with the shaft 5a in the thickness direction of the panel P.
And a first flange portion 5b and a second flange portion 5c which are parallel to the main surface of the panel P.
b has a plurality of filling holes 7a and 7b for filling the filler. The sandwich panel P is a sandwich panel in which the honeycomb core 5 is sandwiched between two skins 1 and has an insert insertion hole 2b. When the insert 5 is inserted into the insert insertion hole 2b, a filling space 5d to be filled with the filler 4 is formed around the insert 5 in the insert insertion hole 2b.

According to the present invention, the sandwich panel P into which the insert 5 is inserted and held as described above is provided with the flange 5 of the insert 5 as shown in FIGS.
All (two in the illustrated example) filling holes 7a and 7b formed in the filling space 5b are held so as to be located below the uppermost portion 5e of the filling space 5d. In the example shown, the sandwich panel P stands upright and the insert 5 is held in a position such that its longitudinal axis is substantially horizontal. Therefore, both of the two filling holes 7a and 7b formed in the flange portion 5b and arranged vertically are located below the uppermost portion 5e of the filling space 5d.

Next, as shown in FIG. 1, the two filling holes 7a and 7b are inserted into the filling hole 7a which is one of the lowest filling holes. Is completely filled with the filler 4,
The other filling hole 7b (in the illustrated example, the upper filling hole 7b)
Filler 4 is injected into filling space 5d until b) is filled with the filler.

When the filling space 5d is completely filled with the filler 4, the syringe 8 is removed from the filling hole 7a used for injection, and the filling hole 7a is immediately closed with the closing member 9 as shown in FIGS. . The closing member 9 may be, for example, an adhesive tape attached to the flange portion 5b.

In such an insert filling method, the filler 4 is supplied from the syringe 8 through the lower filling hole 7a.
Inject. The filler 4 first accumulates at the lowermost portion of the filling space 5d, and its “liquid level” gradually rises in the hollow cylindrical filling space 5d, further closes the upper filling hole 7b, and further rises. The top of 5d is also filled and filled until no cavities remain in filling space 5d. Next, the syringe 8 is removed from the filling hole 7a, and an adhesive tape, which is a closing member 9, is immediately attached to the flange portion 5b, and the filling hole 7a is removed.
And the filling operation is completed.

The filled filler 4 is pulled downward by gravity and tries to flow into the minute air vent holes of the honeycomb core and the adjacent cells. However, since the space above the filling space 5d is filled with the filling material 4 and the filling hole 7b is also closed by the filling material, and since the filling material 4 has sufficient viscosity, air is filled in the filling space 5d. Without being drawn in, a so-called “negative pressure” is generated inside the filler 4. Therefore, the filler 4 is prevented from moving downward to flow into the air vent hole or the adjacent cell, and the lower filler hole 7a is also closed by the closing member 9, so that the filler 4 flows out of the filling space. Hardly ever. For this reason, it is not necessary to repeat the additional filling operation for refilling the filling-free cavity generated in the filling space several times further, and the filling operation is shortened, and the required amount of the filling material is reduced. Is sufficient and the weight of the panel does not increase.

Embodiment 2 FIG. 5 to 8 show another embodiment of the insert filling method of the present invention. FIGS. 5 and 6 correspond to FIGS. 1 and 2, FIGS. 7 and 8 correspond to FIGS. 3 and 4, and FIGS. 5 and 8 are different from those of FIGS. Small hole 9 in filling hole 7b
That is, the adhesive tape 9b having a is attached. The other points are the same as those shown in FIGS. Therefore, the description thereof will not be repeated here.

The pressure-sensitive adhesive tape 9b of this embodiment may be a plate-like body such as paper, a plastic plate, a metal plate, or the like, which can be peeled off after the filler is cured. The small hole 9a can be formed in a plate-like body before attaching to the insert 5, or can be formed in a needle-like shape after attaching. The size of the small hole may be a small air vent hole such that it is difficult for the filler 4 to flow out, and it is preferable that the small hole has a diameter of 0.2 mm to 0.5 mm. By using such a plate-like body 9b, it is possible to more reliably close the filling hole 7b with the filler 4.

Embodiment 3 FIG. 9 to 12 show another embodiment of the insert filling method of the present invention. 9 and 10 correspond to FIGS. 1 and 2, FIGS. 11 and 12 correspond to FIGS. 3 and 4, and FIGS. 9 and 12 are different from FIGS. This means that a plate-like body 10 such as a permeable cloth or felt for air release is attached to the upper filling hole 7b. The other points are the same as those shown in FIGS. Therefore, the description thereof will not be repeated here.

The plate-shaped member 10 of this embodiment is a gas-permeable plate-shaped member having a large number of fine holes, such as a paper, a plastic plate, a metal plate, or the like attached with an adhesive. Any material that can be peeled later can be used. By using such a plate-like body 9b, it is possible to more reliably close the filling hole 7b with the filler 4.

Embodiment 4 13 to 16 show another embodiment of the insert filling method of the present invention. FIG.
FIGS. 3 and 14 correspond to FIGS. 1 and 2, FIGS. 15 and 16 correspond to FIGS. 3 and 4, and FIGS. 13 to 16 are different from FIGS. Is a filling hole 7a provided in the flange portion 5b of the insert 5.
And 7b are horizontally arranged along the diameter of the flange portion 5b. Also in this case, both of the two filling holes 7a and 7b formed in the flange portion 5b are located below the uppermost portion 5e of the filling space 5d. The syringe 8 is inserted into one (left side in the figure) 7a of the filling holes 7a and 7b arranged in the horizontal direction as shown in FIG. 13, the other 7b is kept open, and the adhesive tape 9 is attached as shown in FIG. It is attached to the filling hole 7a into which the filler 4 has been injected.

In such an insert filling method, the filler 4 is supplied from the syringe 8 through one of the filling holes 7a.
Inject. The filler 4 first accumulates at the lowermost part of the filling space 5d, and its “liquid level” gradually rises in the hollow cylindrical filling space 5d, closes the filling hole 7b, and further rises. Fill the top 5e to fill space 5
Inject until no cavities remain in d. Next, the syringe 8 is removed from the filling hole 7a, and an adhesive tape as the closing member 9 is immediately attached to the flange portion 5b to close the filling hole 7a, thereby completing the filling operation.

Also in this case, since the space above the filling space 5d is filled with the filler 4 and the filling hole 7b is closed by the filler, and since the filler 4 has sufficient viscosity, No air is drawn into the filling space 5d, and a so-called “negative pressure” is generated inside the filling material 4. Therefore, the filler 4 is prevented from moving downward to flow into the air vent hole or the adjacent cell, and since the lower filling hole 7b is also closed by the closing member 9, the filler 4 flows out of the filling space. Hardly ever. For this reason, it is not necessary to repeat the additional filling operation for refilling the filling-free cavity generated in the filling space several times further, and the filling operation is shortened, and the required amount of the filling material is reduced. Is sufficient and the weight of the panel does not increase.

Embodiment 5 17 to 20 show another embodiment of the insert filling method of the present invention. FIG.
7 and FIG. 18 correspond to FIG. 13 and FIG.
FIGS. 20 and 21 are views corresponding to FIGS. 15 and 16, and FIGS. 17 to 20 are different from FIGS.
To the adhesive tape 9b having the same small holes 9a as shown in FIG.
Is affixed. Other points are the same as those shown in FIGS. Therefore, the description thereof will not be repeated here.

Embodiment 6 FIG. 21 to 24 show still another embodiment of the insert filling method of the present invention.
FIGS. 21 and 22 correspond to FIGS. 13 and 14, FIGS. 23 and 24 correspond to FIGS. 15 and 16, and FIGS. 21 to 24 are different from FIGS. That is, a plate-like body 10 such as a permeable cloth or felt for venting air is stuck to the filling hole 7b on the side where the syringe 8 is not inserted. Other points are the same as those shown in FIGS. Therefore, the description thereof will not be repeated here.

In the above description, an embodiment in which the insert filling method of the present invention is applied to a through-type insert has been described. However, the present invention can also be applied to a stop-type insert as shown in FIG. Further, the present invention can be applied to an insert in which the filling hole of the insert is located below the top of the filling space, even if the direction of the axis of the insert is not necessarily horizontal. Further, the number of filling holes in the insert is not limited to two, but may be three.
The present invention can be applied to an insert having more than one filling hole.

[0032]

As described above, according to the insert filling method of the present invention, the panel has a shaft portion in the thickness direction of the panel and a flange portion parallel to the main surface of the panel. Filling the filling space formed around the insert in the insert insertion hole in order to insert and fix the insert having the filling hole in the insert insertion hole of the sandwich panel sandwiching the honeycomb core between the two skins An insert filling method, wherein the panel is held such that the filling hole of the insert is located below the top of the filling space, and from one of the filling holes at the lowest position of the panel, Injecting the filler into the filling space until the filling space is completely filled with the filler and all other filling holes are filled with the filler, and the filling used for the filling Insert filling method comprising the step of closing immediately closure member is obtained. Therefore, the filler is prevented from moving downward in order to flow into the air vent hole or the adjacent cell, and hardly flows out of the filling space. And the amount of filler required is small, so that the weight of the panel does not increase.

When the insert has two filling holes, the step of holding the panel includes the step of standing upright so that the two filling holes of the insert are arranged vertically, and the step of injecting the filler includes the step of injecting the filler. The process is simple and reliable because of the provision of the step of filling from the lower filling hole.

Further, before the filler is injected, a step of attaching a tape to the filling hole on the upper side of the insert and a step of making a hole of 0.2 to 0.5 mm in the tape are provided. Even when the filling hole is large, a reliable filling operation can be easily performed.

In addition, since a step of attaching a gas permeable cloth to the filling hole on the upper side of the insert before filling is provided, a reliable filling operation can be easily performed even when the filling hole is large.

When the insert has two filling holes, the step of holding the panel includes a step of vertically setting the two filling holes of the insert so as to be arranged side by side, and the step of injecting the filler is performed on one side of the insert. The operation is simple and reliable because of the provision of the step of injecting from the filling hole.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a filler is injected by an insert filling method of the present invention.

FIG. 2 is a sectional view taken along the axis of the insert of FIG. 1;

FIG. 3 is a perspective view showing a state in which a filling hole is closed after a filler is injected by the insert filling method of FIG. 1;

FIG. 4 is a sectional view taken along the axis of the insert of FIG. 3;

FIG. 5 is a perspective view showing a state in which a filler is injected according to another embodiment of the insert filling method of the present invention.

FIG. 6 is a sectional view taken along the axis of the insert of FIG. 5;

FIG. 7 is a perspective view showing a state in which a filling hole is closed after filling is injected by the insert filling method of FIG. 5;

FIG. 8 is a sectional view taken along the axis of the insert of FIG. 7;

FIG. 9 is a perspective view showing a state in which a filler is injected according to another embodiment of the insert filling method of the present invention.

FIG. 10 is a sectional view taken along the axis of the insert of FIG. 9;

FIG. 11 is a perspective view showing a state in which a filling hole is closed after filling is injected by the insert filling method of FIG. 9;

FIG. 12 is a sectional view taken along the axis of the insert of FIG. 11;

FIG. 13 is a perspective view showing a state in which a filler is being injected according to another embodiment of the insert filling method of the present invention.

FIG. 14 is a sectional view taken along the axis of the insert of FIG. 13;

FIG. 15 is a perspective view showing a state in which the filling hole is closed after the filling of the filler by the insert filling method of FIG. 13;

FIG. 16 is a sectional view taken along the axis of the insert of FIG. 15;

FIG. 17 is a perspective view showing a state in which a filler is being injected according to another embodiment of the insert filling method of the present invention.

FIG. 18 is a sectional view taken along the axis of the insert of FIG. 17;

FIG. 19 is a perspective view showing a state in which the filling hole is closed after the filling of the filler by the insert filling method of FIG. 17;

FIG. 20 is a sectional view taken along the axis of the insert of FIG. 19;

FIG. 21 is a perspective view showing a state in which a filler is being injected according to still another embodiment of the insert filling method of the present invention.

FIG. 22 is a sectional view taken along the axis of the insert of FIG. 21.

FIG. 23 is a perspective view showing a state in which a filling hole is closed after filling is injected by the insert filling method of FIG. 21;

FIG. 24 is a sectional view taken along the axis of the insert of FIG. 23.

FIG. 25 is a cross-sectional view illustrating a conventional through-type insert filling method.

FIG. 26 is a cross-sectional view illustrating a conventional blind insert filling method.

[Explanation of symbols]

Reference Signs List 1 skin, 2 honeycomb core, 3 adhesive, 4 filler, 5 insert, 5a first flange, 5b
Second flange portion, 5d filling space, 5e top of filling space, 7 filling hole, 8 syringe, 9, 10 plate, P sandwich panel.

Claims (7)

[Claims] 1. An insert having a shaft portion in a thickness direction of a panel and a flange portion parallel to a main surface of the panel, and having a plurality of filling holes for filling a filler in the flange portion, using two skins. An insert filling method of filling a filler space into a filling space formed around the insert in the insert insertion hole in order to insert and fix the insert into the insert insertion hole of the sandwich panel sandwiching the honeycomb core. Holding the panel so that the filling hole is located below the top of the filling space; and, from one of the filling holes at the lowest position of the panel, the filling space is completely Injecting the filler into the filling space until it is completely filled with filler and all other filling holes are filled with the filler; And a step of closing with a closing member. 2. The insert has two filling holes,
The step of holding the panel includes a step of vertically setting the two filling holes of the insert so as to be vertically arranged, and the step of injecting the filler includes a step of injecting the filler from a lower filling hole of the insert. The insert filling method according to claim 1, wherein: 3. A step of attaching a tape to a filling hole on an upper side of the insert and a step of making a hole having a diameter of 0.2 to 0.5 mm in the tape before injecting the filler. The insert filling method according to claim 2, wherein: 4. The method according to claim 2, further comprising the step of attaching a gas permeable cloth to the filling hole on the upper side of the insert before performing the injection. 5. The insert has two filling holes,
The step of holding the panel includes a step of vertically setting the two filling holes of the insert so that the two filling holes are arranged side by side, and the step of injecting the filler includes a step of injecting from one of the filling holes of the insert. The insert filling method according to claim 1, characterized in that: 6. A step of attaching a tape to a filling hole on one side of the insert before performing the injection, and a step of punching a hole having a diameter of 0.2 to 0.5 mm in the tape. The insert filling method according to claim 5, wherein 7. The insert filling method according to claim 5, further comprising a step of attaching a gas permeable cloth to a filling hole on one side of the insert before performing the injection.