JPH11179569A - Sandwich panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the sandwich panel capable of fitting a fitting seat to a panel body without any obstruction in the brazing and without degradation in strength of the fitting seat. SOLUTION: Relating to a sandwich panel in which a core 3 is interposed between a pair of surface plates 1a, 1b, at least one surface plate 1a of the surface plates 1a, 1b is notched, and a part of the core 3 is removed to provide a recess 5, a fitting seat 7A is fitted into the recess 5, and is joined with the surface plate 1a by the friction welding 6. A panel body 4 can be manufactured without any obstruction in the brazing, and the fitting seat 7A can be fitted and fixed to the panel body 4 without degradation in strength of the fitting seat 7A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sandwich panel, and more particularly, to a sandwich panel having a mounting seat.

[0002]

2. Description of the Related Art Generally, a sandwich panel in which a pair of aluminum-made surface plates and an aluminum-made core material interposed between the surface plates are integrally brazed is lightweight and excellent in heat insulation and heat insulation. Therefore, it is widely used as a building material for interiors and exteriors.

In order to attach the above sandwich panel to a frame, a column or the like, generally, as shown in FIG. 24, a mounting member c having a member to be attached, for example, a bracket b, is fixed to an appropriate portion of the sandwich panel a with a bolt d. The mounting member e is connected to the bracket b of the mounting bracket c. In this case, as shown in FIG. 25 (a), for example, as shown in FIG. The seat h is buried or, as shown in FIG. 25 (b), the core material g is cut out so as to penetrate the mounting portion of the mounting bracket c and the mounting seat h is buried. In addition, in order to impart strength to the mounting seat h, the mounting seat h generally has a block shape.

[0004]

However, when the pair of surface plates f, the core material g, the frame material j, and the mounting seat h, etc. constituting the sandwich panel are simultaneously brazed together, the mounting seat h is made of other members. However, since the thickness of each member is several steps thicker than that of the other members, it is difficult to increase the temperature of each member for brazing to match the temperature of other members in terms of heat capacity.

[0005] That is, when the temperature rising condition is adjusted to the mounting seat h, not only the amount of heat at the time of brazing becomes large, but also the temperature of other members becomes too high, and the reduction of the material strength is promoted. Had become. Conversely, when the temperature of the other members is raised, the temperature of the mounting seat h rises undesirably, resulting in poor brazing.

As means for solving this problem, a mounting seat h
Can be attached by welding. However, this welding method has a problem in that it takes time and effort to attach, and there is a possibility that thermal distortion may occur or troublesome operations such as polishing of a welded portion may be required.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sandwich panel in which a mounting seat is inserted without hindering brazing and without lowering the strength of the mounting seat. Is what you do.

[0008]

Means for Solving the Problems To achieve the above object, according to the first aspect of the present invention, in a sandwich panel having a core material interposed between a pair of surface plates, at least one of the surface plates is cut. The recess is provided by removing the chip and a part of the core material, and the mounting seat is inserted into the recess, and the mounting seat and the surface plate are joined by friction welding. .

In this case, it is preferable that the surface plate and the core member are formed of an aluminum member, and that the surface plate and the core member are integrally joined by brazing.

According to a third aspect of the present invention, in a sandwich panel having a core material interposed between a pair of surface plates, at least one of the surface plates is cut out, and a part of the core material is removed to form a recess. And a side wall of the recess is formed by a reinforcing member interposed between the surface plates, and a mounting seat is inserted into the recess, and the mounting seat and the surface plate or the surface plate and The reinforcing member is joined by friction welding.

In this case, it is preferable that the surface plate, the core material, and the reinforcing member are each formed of an aluminum material, and that the surface plate, the core material, and the reinforcing member are integrally joined by brazing. 4).

According to the first aspect of the present invention, at least one of the surface plate is cut out and a part of the core material is removed, so that the mounting seat is inserted into the recess and provided with the mounting seat and the front surface. By joining with the face plate by friction welding, the mounting seat can be fitted and fixed in the recess without the strength of the mounting seat being reduced by thermal strain. In this case, the surface plate and the core material are formed of an aluminum member, and the surface plate and the core material are integrally joined by brazing, so that the surface plate is compared with the case where the mounting seat is brazed at the same time. The amount of heat required for brazing the core material and the core material can be reduced (claim 2).

According to the third aspect of the present invention, at least one of the surface plates is cut out, and a side wall portion of the recess provided by removing a part of the core material is provided as a reinforcing member interposed between the surface plates. In addition to fitting the mounting seat in the recess,
By joining the mounting seat and the surface plate or the surface plate and the reinforcing member by friction welding, the mounting seat can be firmly inserted and fixed in the recess without the strength of the mounting seat being reduced by thermal strain. In this case, the mounting plate is simultaneously brazed by forming the surface plate, the core member, and the reinforcing member from aluminum members, and integrally joining the surface plate, the core member, and the reinforcing member by brazing. The amount of heat required for brazing the surface plate, the core material, the frame material, and the reinforcing member can be reduced as compared with the case (claim 4).

[0014]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. First Embodiment FIG. 1 is a perspective view showing a part of a first embodiment of a sandwich panel of the present invention in cross section, and FIG. 2 is a sectional view of a main part thereof.

The sandwich panel is formed by a pair of rectangular surface plates 1a and 1b, a frame member 2 disposed around the surface plates 1a and 1b, and the surface plates 1a and 1b and the frame member 2. A panel body 4 composed of a cylindrical core material 3 interposed in a space defined by the inside and a recess formed by cutting out one surface plate 1a of the panel body 4 and removing a part of the core material 3. 5 and an attachment seat 7A to which a joint with the surface plate 1a is joined by friction welding 6. Note that the mounting seat 7A is fitted in the vicinity of the four corners of the panel.

In this case, the surface plates 1a and 1b are formed of a plate made of aluminum, and the frame 2 is formed of an extruded member made of aluminum. The core member 3 is formed by extruding a cylindrical extruded member made of aluminum material or a strip made of aluminum material into a cylindrical shape. Note that, in this case, the aluminum material is a member made of an aluminum material that has a good magnesium content and a low content of magnesium, which is good in brazing property with a fluoride flux. The panel body 4 is formed by integrally joining the surface plates 1a and 1b, the frame member 2 and the core member 3 formed by the aluminum member in this manner by brazing. Therefore, even when the core material 3 is formed by bending an aluminum strip, the separated portions at both ends of the strip are joined by brazing after the honeycomb panel is formed, and the core 3 is completely removed. Become cylindrical. Any of the surface plates 1a and 1b, the frame material 2 and the core material 3 can be formed of an aluminum clad material using a brazing material on the surface thereof.
The aluminum clad material may not be used for any of the a, 1b, the frame material 2 and the core material 3, but the brazing material may be interposed between them, and the brazing material may be melted and brazed during the heat treatment. In this case, the flux is a non-corrosive flux such as KF + AlF3 or KAlF4 + K3AlF6.
+ Surface plate 1 using flux such as K2AlF5.H2O
a, 1b, the frame member 2 and the core member 3 are preferably joined. The mounting seat 7A is formed of, for example, an aluminum material block having a higher magnesium content and a higher strength than an aluminum material having good fluoride flux and brazing properties.

In order to attach the mounting seat 7A to the panel main body 4, as described above, the surface plates 1a and 1b, the frame member 2 and the core member 3 are brazed to produce the panel main body 4, and then one of the front surfaces is formed. The recess 5 is formed by notching the face plate 1a and removing a part of the core material 3 or by removing the face plate 1a in advance and removing a part of the core material 3 before brazing. After forming, the panel body 4 is produced by brazing,
The mounting seat 7 </ b> A is inserted into the recess 5. As shown in FIG. 3, the fitting of the mounting seat 7 </ b> A is performed while the panel main body 5 is placed on the receiving stand 8 and fixed by a clamp or the like (not shown). Next, a probe 10 projecting from the lower surface of a cylindrical shoulder 9 held by a rotation holding means (not shown) is pressed against the upper surface of the contact portion between the surface plate 1a and the mounting seat 7A. When the probe 10 is moved in a horizontal direction along the joint while rotating the probe 10 at a high speed (for example, 1000 to 5000 rpm), the contact portion between the surface plate 1a and the mounting seat 7A is softened by frictional heat, agitated, and the metal moves. Welded by pressing in the direction 6 (friction welding)
Is done. In this manner, the mounting seat 7A is inserted and fixed at an appropriate position of the panel main body 4, for example, at a position near the four corners.

[0018] The sandwich panel manufactured as described above has no cracks or blowholes at the joint due to brazing of the brazing material as compared with conventional TIG welding or MIG welding, and has no influence of heat. Since the number is small, the distortion of the panel body 4 can be reduced, and the product quality can be improved. In addition, a screw hole 11 as shown in FIG. 4 is formed in the mounting seat 7A fitted and fixed in the recess 5 of the panel body 4, and a mounting target such as a bracket ( (Not shown).

In the above description, a case has been described in which the probe 10 is pressed against the upper surface of the contact portion between the surface plate 1a and the mounting seat 7A and is fixed by friction welding 6, but as shown in FIG. The probe 10 may be pressed against the front surface plate 1b on the back surface where the 7A is inserted and moved in the horizontal direction while rotating at a high speed to perform friction welding 6 between the front surface plate 1b and the mounting seat 7A (FIG. 5). reference).

Second Embodiment FIG. 7 is a sectional view showing a main part of a second embodiment of the sandwich panel of the present invention. In the second embodiment, both surface plates 1a, 1
b, and a part of the core material 3 is removed to form a recess 5
A is provided, and a contact portion between the mounting seat 7A to be inserted into the recess 5A and the both surface plates 1a, 1b is joined by friction welding 6.

In order to manufacture the sandwich panel of the second embodiment, as in the first embodiment, first, the surface plate 1
a, 1b, the frame material 2 and the core material 3 are brazed to form the panel body 4, and then both the face plates 1a and 1b are cut out, and a part of the core material 3 is removed to form a recess 5A. Alternatively, before the brazing, the surface plates 1a and 1b are cut out in advance, and a part of the core material 3 is removed to form a recess 5A, and then the panel body 4 is brazed to produce the recess 5A. The mounting seat 7A is inserted therein. Then, as shown in FIG. 8, the probe 10 is pressed against the contact portion between the both surface plates 1a, 1b and the mounting seat 7A in the same manner as in the first embodiment, and the probe 1
0 while rotating horizontally at high speed, and the both surface plates 1a, 1b
And the contact portion of the mounting seat 7A is subjected to friction welding 6.

According to the sandwich panel constructed as described above, the front plates 1a and 1b and the mounting seat 7A are joined by the friction welding 6, so that the mounting seat 7A is more rigid than that of the first embodiment. And the strength of the panel itself can be improved. In the second embodiment, other parts are the same as those in the first embodiment, and thus the same parts are denoted by the same reference numerals and description thereof will be omitted.

Third Embodiment FIG. 9 is a plan view showing a part of a third embodiment of the sandwich panel of the present invention in cross section, and FIG. 10 is a cross sectional view taken along line AA in FIG. In the third embodiment, the joining between the panel body and the mounting seat is further strengthened. That is, in addition to the pair of surface plates 1a and 1b, the frame material 2 interposed between the sides of the both surface plates 1a and 1b, and the many core materials 3 interposed between the both surface plates 1a and 1b, The panel main body 4A is formed by integrally bonding an aluminum-made, for example, rectangular-section-shaped auxiliary member 12 interposed between the surface plates 1a and 1b by brazing. Then, one surface plate 1a of the panel body 4A
Is cut out and a part of the core material 3 is removed to form a rectangular recess 5B. Alternatively, the surface plate 1a is cut out before brazing and a part of the core material 3 is removed. 5B, a side wall portion of the recess 5B is formed by the reinforcing member 12, and a rectangular mounting seat 7B is inserted into the recess 5B so that the mounting seat 7B and the surface plate 1a and the auxiliary member 12 are connected to each other. This is a case where the contact portions are joined by friction welding 6. In this case, at least the contact portion between the mounting seat 7B and the surface plate 1a may be joined by friction welding 6, but it is preferable that the mounting seat 7B, the surface plate 1a, and the auxiliary member 12 be joined by friction welding 6. Is good.

In this case, the reinforcing member 12 is composed of a plurality of (four in the drawing, shown in the drawing) parallel auxiliary elongated members 12a which are bridged between the facing frame members 2, and two opposing auxiliary members 12a. It consists of a short auxiliary member 12b which is bridged between the auxiliary members 12a, and the auxiliary members 12a and 12b form a side wall of the recess 5B.

As described above, by forming the side wall portion of the recess 5B provided in the panel main body 4A with the reinforcing member 12, the fitting and fixing of the mounting seat 7B can be strengthened, and the panel itself can be fixed. Strength can be increased. In the above description, the mounting seat 7B to be inserted into the recess 5B.
The contact portion between the surface plate 1a and the reinforcing member 12 by friction welding 6
As shown in FIG. 11, the probe 10 is pressed against the front surface plate 1b on the back surface side of the mounting seat 7B to perform friction welding 6 between the mounting seat 7B and the front surface plate 1b, as shown in FIG.
Alternatively, the attachment seat 7B, the surface plate 1b, and the reinforcing member 12 may be subjected to friction welding 6. In the third embodiment, other parts are the same as those in the first and second embodiments, and therefore, the same parts are denoted by the same reference numerals and description thereof will be omitted.

Fourth Embodiment FIG. 12 is a sectional view showing a main part of a fourth embodiment of the sandwich panel according to the present invention. In the fourth embodiment, both the face plates 1a and 1b are cut out and a part of the core material 3 is removed to provide a rectangular recess 5C, or the face plates 1a and 1b are cut before brazing. The recess 5C is provided by removing the chip and a part of the core material 3, and the side wall of the recess 5C is formed by the reinforcing member 12, and the rectangular mounting seat 7B is inserted into the recess 5C. , Mounting seat 7B and surface plate 1a,
1b and frictional welding 6
This is the case when they are joined together.

According to the sandwich panel constructed as described above, the mounting seat 7A and the front and back plates 1a and 1b or the mounting seat 7B and the front and back plates 1a and 1b and the auxiliary member 12 are joined by friction welding 6. As compared with the third embodiment, the mounting seat 7A can be more firmly fitted and fixed, and the strength of the panel itself can be further improved. In the fourth embodiment, other portions are the same as those in the first to third embodiments, and thus the same portions are denoted by the same reference numerals and description thereof will be omitted.

Fifth Embodiment FIG. 13 is a sectional view showing a main part of a sandwich panel according to a fifth embodiment of the present invention. The fifth embodiment reduces the weight of the panel itself, improves the strength of the panel itself,
In this case, the mounting seat is firmly fitted and fixed. That is, the auxiliary member 12 of the third and fourth embodiments is used.
5B using a hollow rectangular auxiliary member 12A instead of
Alternatively, a side wall of 5C is formed, and the mounting seat 7B and the surface plate 1a or the mounting seat 7B, the surface plate 1a, and the auxiliary member 12A are friction welded to each other in the same manner as in the third embodiment or the fourth embodiment.
(See FIG. 13A) or the mounting seat 7B.
And surface plates 1a, 1b or mounting seat 7B and surface plates 1a, 1b
And the reinforcing member 12A are joined by friction welding 6 (see FIG. 13 (b)), or the mounting seat 7B and both face plates 1 are joined.
This is a case in which a, 1b or the mounting seat 7B is joined to the two face plates 1a, 1b and the auxiliary member 12A by friction welding 6 (see FIG. 13C).

According to the sandwich panel configured as described above, since the auxiliary member 12A forming the side wall of the recesses 5B and 5C is formed in a hollow shape, the third embodiment and the fourth embodiment can be used. The weight of the panel itself can be reduced as compared with the case of. In the fifth embodiment, other portions are the same as those in the first to fourth embodiments, and thus the same portions are denoted by the same reference numerals and description thereof will be omitted.

Sixth Embodiment FIG. 14 is a plan view showing a cross section of a part of a sandwich panel according to a sixth embodiment of the present invention, and FIG. 15 is a sectional perspective view taken along line BB of FIG. In the sixth embodiment, a reinforcing member forming a recess is formed by a tubular auxiliary member embedded in a panel main body in advance. In this case, a pair of surface plates 1a, 1b, a frame member 2 arranged around these surface plates 1a, 1b, and a core interposed in a space formed by the surface plates 1a, 1b and the frame member 2 Material 3 and surface plates 1a, 1b
A panel body, such as a cylindrical auxiliary member 12B made of aluminum material, which is interposed therebetween and which is embedded in the recess 5D in which a part of the core material 3 has been removed in advance, is brazed to form a panel body. 4B is formed. And the auxiliary member 12
B at least one surface plate 1a located on the cavity of B
(1b) is notched or a recess 5D is provided in advance before brazing to expose the recess 5D, that is, the cavity of the auxiliary member 12B, and the mounting seat is provided in the recess 5D, that is, the cavity of the auxiliary member 12B. 7C, and the mounting seat 7C and the surface plate 1a (1b) or the mounting seat 7
C, the surface plate 1a (1b) and the auxiliary member 12B are joined by friction welding 6, and the mounting seat 7C is inserted and fixed.

According to the sandwich panel configured as described above, the auxiliary member 12 forming the side wall of the recess 5D is formed.
B is formed in a tubular shape, for example, a cylindrical shape, and is integrally joined together with the surface plates 1a and 1b, the frame material 2 and the core material 3 in advance by brazing, so that the strength of the panel itself can be improved, and The mounting seat 7C can be firmly fitted and fixed. Further, the number of constituent members can be reduced as compared with the third to fifth embodiments, and the weight of the panel can be reduced. In the sixth embodiment, the other parts are the same as those in the first to fifth embodiments.
Description is omitted.

Seventh Embodiment FIG. 16 is a sectional view showing a main part of a sandwich panel according to a seventh embodiment of the present invention, and FIG. 17 is a perspective view showing a mounting seat in the seventh embodiment. In the seventh embodiment, the deformation of the surface plate and the panel itself is reduced, and the fitting of the mounting seat to the panel body can be firmly performed. That is, as shown in FIG. 16 and FIG. 17, for example, the step 1
3, and the step 13 is joined to the mounting seat 7D and the surface plates 1a, 1b in a state where the step 13 is located on one of the surface plates of the recess 5E, for example, a small-diameter opening edge provided in the surface plate 1b. In this case, the parts are joined by friction welding 6. In this case, the opening 5a having the same diameter as or slightly larger than the outer diameter of the mounting seat 7D is cut out in the surface plate 1a, and the diameter of the step portion 13 of the mounting seat 7D is formed in the other surface plate 1b. The opening 5b is cut out and a part of the core material 3 is removed to provide a recess 5E. Then, the mounting seat 7D is inserted into the recess 5E from the opening 5a of the surface plate 1a, and the step 13 is connected to the opening 5a of the surface plate 1b.
b, and the contact portions of the mounting seat 7D and the surface plates 1a, 1b are joined by friction welding 6.

According to the sandwich panel constructed as described above, one surface plate 1b is provided on the step 13 of the mounting seat 7D.
Since the mounting seat 7D is fitted and fixed in a state in which is engaged, the fitting and fixing of the mounting seat 7D can be strengthened. Further, since the mounting seat 7D enters the inner surface side of the front plate 1b, deformation of the front plates 1a and 1b and the panel itself can be reduced.

In the above description, the case where the mounting seat 7D is formed in a cylindrical shape has been described. However, the mounting seat 7D may have any shape, for example, as shown in FIG. 18, one end of a rectangular mounting seat body 7a. May be provided with a radially bulging portion 7b leaving a step portion 13 on the outer peripheral surface thereof, or as shown in FIG. 19, a cylindrical mounting seat body 7c, a triangular pillar mounting seat body 7d, and a pentagonal pillar-shaped mounting seat body 7d. The radial bulging portion 7b may be formed by leaving the step portion 13 on the outer periphery on one end side of the mounting seat body 7e. Note that the radial bulging portion 7 is provided on the mounting seat 7D.
b, the surface plate 1 on the side where the mounting seat 7D is inserted.
It is necessary to cut out an opening similar in shape to the bulging portion 7b in a. In the seventh embodiment, the other parts are the same as those in the first to sixth embodiments.
The same portions are denoted by the same reference numerals, and description thereof will be omitted.

Other Embodiments (1) In the above embodiment, the case where the mounting seat is solid has been described. However, the mounting seat does not necessarily need to be solid. For example, FIGS. A tubular body as shown, for example, a cylindrical mounting seat 7E may be used. In FIG. 20, the other parts are the same as those in the first embodiment, and thus the same parts are denoted by the same reference numerals and description thereof will be omitted. Further, in the embodiment shown in FIG. 20, the case where the mounting seat 7E and the surface plate 1a are joined by friction welding 6 has been described, but the back surface side surface plate 1b may also be joined by friction welding. . Further, the mounting seat 7E may be formed in a cylindrical body other than the cylindrical shape, or may be applied to the second to seventh embodiments.

(2) In the seventh embodiment, a small-diameter opening 5 is formed in one of the surface plates 1a and 1b of the panel body.
Although the case where b is provided and the mounting seat 7D having the step portion 13 is fitted and fixed has been described, the present invention can also be applied to a case where the side wall portion of the recess is formed by a reinforcing member. That is, as shown in FIGS. 22A and 22B, the stepped reinforcing member 12
A recess 5F is formed using C, and a mounting seat 7D having a step 13 inserted into the recess 5F is joined to the surface plates 1a and 1b, the reinforcing member 12C, and the like by friction welding 6 as described above. May be. In FIG. 22A, the mounting seat 7D
The case where friction welding 6 is performed on the surface plate 1a and the reinforcing member 12C is described, but the surface plate 1b and the mounting seat 7D may be joined by friction welding 6 as a matter of course.

(3) In the first to sixth embodiments,
Although the case where the outer circumference of the mounting seat has the same diameter has been described,
For example, as shown in FIGS.
By providing the tapered portion 7c of which one end has a small diameter, for example, 2 to 5 °, the fitting seat 7E can be easily inserted into the recess 5. In FIG. 23, other parts are the same as those in the first to sixth embodiments,
The same portions are denoted by the same reference numerals, and description thereof will be omitted.

(4) In the above embodiment, the case where the panel body has the frame member 2 interposed between the sides of the pair of surface plates 1a and 1b has been described. However, the frameless panel without the frame member 2 is used. It may be the main body.

(5) In the above embodiment, the case where the core material 3 is cylindrical has been described. However, the core material 3 is not necessarily required to be cylindrical. For example, a triangular cylindrical shape, a pentagonal cylindrical shape, It may be formed of an arbitrary hollow body such as a hexagonal cylinder. Alternatively, a honeycomb-shaped core material obtained by bending a band-shaped member made of aluminum material into a trapezoidal wave shape and brazing it back to back may be used.

(6) In the above embodiment, the case where the mounting seats are arranged at four positions of the sandwich panel has been described. However, the mounting positions and the number of the mounting seats may be arbitrary. For example, six or eight of the honeycomb panels are provided. It is also possible to insert a mounting seat at a location or the like.

[0041]

As described above, according to the sandwich panel of the present invention, since it is configured as described above,
The following excellent effects can be obtained.

1) According to the first aspect of the present invention, the mounting seat is inserted into a recess formed by cutting out at least one of the surface plates and removing a part of the core material.
Since the mounting seat and the surface plate are joined by friction welding, the mounting seat can be inserted and fixed in the recess without reducing the strength of the mounting seat due to thermal strain. In this case, the surface plate and the core material are formed of an aluminum member, and the surface plate and the core material are integrally joined by brazing, so that the surface plate is compared with the case where the mounting seat is brazed at the same time. The amount of heat required for brazing the core material and the core material can be reduced (claim 2). In addition, an aluminum material having higher strength can be used for the mounting seat as compared with an aluminum material having good brazability with a fluoride-based flux, and further improvement in the strength of the mounting seat can be expected.

2) According to the third aspect of the present invention, at least one of the surface plates is cut out, and a side wall of the recess provided by removing a part of the core material is interposed between the surface plates. It is formed of a reinforcing member, and the mounting seat is inserted into the recess and the mounting seat and the surface plate or the surface plate and the reinforcing member are joined by friction welding. In addition to the above 1), the mounting seat can be more securely fitted and fixed in the recess. In this case, the mounting plate is simultaneously brazed by forming the surface plate, the core member, and the reinforcing member from aluminum members, and integrally joining the surface plate, the core member, and the reinforcing member by brazing. Compared to the case, surface plate, core material,
The amount of heat required for brazing the frame member and the reinforcing member can be reduced (claim 4). Also, for the mounting seat, aluminum material with higher strength can be used as compared with aluminum material with good fluoride flux and brazing property,
Further improvement in the strength of the mounting seat can be expected.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a cross section of a part of a first embodiment of a sandwich panel of the present invention.

FIG. 2 is a sectional view of a main part of the first embodiment.

FIG. 3 is a cross-sectional view showing a state of friction welding between the mounting seat and the surface plate in the first embodiment.

FIG. 4 is a perspective view showing a mounting seat according to the first embodiment.

FIG. 5 is a sectional view of a main part showing another example of the first embodiment.

FIG. 6 is a cross-sectional view showing another state of friction welding between the mounting seat and the surface plate in the first embodiment.

FIG. 7 is a sectional view of a main part of a second embodiment of the sandwich panel of the present invention.

FIG. 8 is a cross-sectional view showing a state of friction welding between the mounting seat and the surface plate in the second embodiment.

FIG. 9 is a plan view showing a part of a third embodiment of the sandwich panel of the present invention in cross section.

FIG. 10 is a sectional view taken along line AA of FIG. 9;

FIG. 11 is a sectional view showing another example of the third embodiment.

FIG. 12 is a sectional view of a main part of a fourth embodiment of the sandwich panel of the present invention.

FIG. 13 is a fragmentary cross-sectional view showing another form of the fifth embodiment of the sandwich panel of the present invention.

FIG. 14 is a plan view showing a cross section of a part of the sixth embodiment of the sandwich panel of the present invention.

FIG. 15 is a sectional view taken along the line BB of FIG. 14;

FIG. 16 is a sectional view of a main part of a seventh embodiment of the sandwich panel of the present invention.

FIG. 17 is a perspective view showing a mounting seat according to a seventh embodiment.

FIG. 18 is a perspective view showing another shape of the mounting seat in the seventh embodiment.

FIG. 19 is a plan view showing still another shape of the mounting seat in the seventh embodiment.

FIG. 20 is a sectional view of a principal part of an eighth embodiment of the sandwich panel of the present invention.

FIG. 21 is a perspective view showing a mounting seat according to an eighth embodiment.

FIG. 22 is a fragmentary cross-sectional view showing another form of the ninth embodiment of the sandwich panel of the present invention.

FIG. 23 is a cross-sectional view of a principal part showing another form of the tenth embodiment of the sandwich panel of the present invention.

FIG. 24 is a perspective view showing a state where a mounting bracket is mounted on a conventional sandwich panel.

FIG. 25 is a cross-sectional view showing another mounting state of the mounting seat in the conventional sandwich panel.

[Explanation of symbols]

 1a, 1b Surface plate 2 Frame material 3 Core material 4, 4A, 4B Panel body 5, 5A-5F recess 6 Friction welding 7A-7E Mounting seat 12, 12A-12C Auxiliary member

Continued on the front page (72) Inventor Hiroshi Yamamoto 20-1 Shimoda-cho, Sakai City, Osaka Prefecture Nippon Light Metal Co., Ltd. Osaka Plant (72) Inventor Akihiko Yoshimi 2-2-220 Higashishinagawa, Shinagawa-ku, Tokyo Japan Light Metal Inside the company

Claims (4)

[Claims] 1. A sandwich panel having a core material interposed between a pair of surface plates, wherein at least one of the surface plates is cut out and a part of the core material is removed to form a recess. A sandwich panel, wherein the mounting seat is inserted and the mounting seat and the surface plate are joined by friction welding. 2. The sandwich panel according to claim 1, wherein the surface plate and the core member are formed of an aluminum member, and the surface plate and the core member are integrally joined by brazing. Characterized by a sandwich panel. 3. A sandwich panel having a core material interposed between a pair of surface plates, wherein at least one of the surface plates is cut out and a part of the core material is removed to provide a recess. The side wall portion is formed by a reinforcing member interposed between the surface plates,
A sandwich panel, wherein a mounting seat is inserted into the recess and the mounting seat and the surface plate or the surface plate and the reinforcing member are joined by friction welding. 4. The sandwich panel according to claim 3, wherein the surface plate, the core member and the reinforcing member are each formed of an aluminum member, and the surface plate, the core member and the reinforcing member are integrated by brazing. A sandwich panel characterized by being joined.