JP4192138B2 - Laminated sheet - Google Patents

Description

  The present invention relates to a laminated sheet obtained by laminating both surfaces of an intermediate sheet having a hollow convex portion so as to be sandwiched between a front side sheet and a back side sheet.

  Conventionally, as this type of laminated sheet, as disclosed in Patent Document 1, a honeycomb structure is formed by sticking a sticking member on both surfaces of a hollow convex body formed on a thin plate. A laminated sheet is generally known in which a skin material is sandwiched between both sides of a body. Since such a laminated sheet is lightweight and excellent in rigidity, shock absorption and heat insulation, it is optimal for interior materials such as vehicles and interior materials such as houses.

  FIG. 12 is a view showing the structure of the outer peripheral portion of a laminated sheet having a conventional honeycomb structure, (a) is an enlarged cross-sectional view of a main part showing a state in which a skin material is post-applied, and (b) is a skin food. The principal part expanded sectional view which shows the state when cut | disconnecting a protrusion part, (c) is a principal part expanded sectional view which shows the state when the outer peripheral part of a lamination sheet is cut | disconnected with a hot blade, (d) is the lamination | stacking which cut | disconnected It is a principal part expanded sectional view which shows the state which processed the outer peripheral part of the sheet | seat.

A laminated sheet 100 shown in FIG. 12 is obtained by attaching a skin material 400 to the surface of a plastic pearl (registered trademark, hereinafter omitted) 300 on which a honeycomb structure 200 is formed. In such a laminated sheet 100, a two-layer type in which the skin material 400 is attached to only one side of the plastic pearl 300 as shown in FIG. 12, and a three-layer type in which the skin material 400 is attached to both sides of the plastic pearl 300 (see FIG. Not shown). Hereinafter, the two-layer type laminated sheet 100 will be described.
The honeycomb structure 200 is made of, for example, a sheet-like material obtained by vacuum forming a cylindrical hollow convex body.
Plastic Pearl 300 is a corrugated plastic called “corrugated plastic”, which is excellent in rigidity, water resistance, heat insulation, moisture resistance and chemical resistance, lightweight, and does not generate dioxin, so it is environmentally friendly and recyclable. It is excellent in various points.

As shown in FIG. 12A, when the laminated sheet 100 is manufactured, a skin material 400 slightly larger than the plastic pearl 300 is attached to the surface of the plastic pearl 300 to completely cover the surface. If it does so, the outer peripheral part 410 of the skin material 400 will be in the state which protruded from the outer peripheral part 110 of the lamination sheet 100. FIG.
The protruding outer peripheral portion 410 is cut as shown in FIG. 12B in the next step, and the outer peripheral portion 110 of the laminated sheet 100 is aligned.

  Moreover, as shown in FIG.12 (c), as another means of cut | disconnecting the outer peripheral part 410 of the skin material 400, the method of cut | disconnecting the outer peripheral part 110 of the lamination sheet 100 diagonally with a hot blade is also performed.

Moreover, as shown in FIG.12 (d), the outer peripheral member 500 for covering this outer peripheral part 110 is attached to the outer peripheral part 110 of the lamination sheet 100 formed as shown in FIG.12 (b) by a sewing process. There is also a method.
JP 2000-326430 A (paragraphs 0015 to 0018, FIG. 1)

  However, since the laminated sheet disclosed in Patent Document 1 and the like and the laminated sheet 100 as shown in FIGS. 12A to 12C are used with the outer peripheral portion 110 being cut, There is a problem that the portion 110 is sharp and hurts when touched with a hand, and also looks bad.

  In the case of the laminated sheet 100 as shown in FIG. 12D, the above-mentioned problem is solved by installing the outer peripheral member 500 on the outer peripheral portion 110, but the number of parts of the outer peripheral member 500 increases. Along with this, there is a problem that the processing man-hours and the parts management man-hours increase, resulting in an increase in cost.

  Therefore, an object of the present invention is to provide a low-cost laminated sheet that is painless when touching the outer periphery with a hand and has a good appearance.

In order to solve the above problem, the laminated sheet according to claim 1 is a laminated sheet obtained by laminating both surfaces of an intermediate sheet having a large number of hollow convex portions so as to be sandwiched between a front side sheet and a back side sheet. The intermediate sheet includes a thin plate having a large number of hollow convex portions projecting downward, and a thin plate having a number of hollow convex portions projecting upward in a shape symmetrical to the thin plate, The top sheet and the back sheet , and the upper thin plate and the lower thin plate are curved in a direction in which their outer peripheral portions face each other, and each end face It is characterized by joining.

  According to invention of Claim 1, the outer peripheral part of a lamination sheet curves the outer peripheral part of a surface side sheet | seat, and the outer peripheral part of a back surface side sheet | seat mutually, Furthermore, the end surfaces are joined. As a result, the outer peripheral portion of the laminated sheet is improved in appearance because the end surface of the front surface side sheet and the end surface of the back surface side sheet are joined to hide the entire intermediate sheet in the front surface side sheet and the back surface sheet. . Furthermore, since the outer peripheral portion of the laminated sheet is formed in a curved shape, the outer peripheral portion is formed so as to draw a smooth curve, so that no pain is felt even when touched by hand. Further, since the laminated sheet is not provided with a separate part on the outer peripheral portion, the number of parts, the number of processing steps, and the number of part management steps can be reduced to reduce costs.

  The laminated sheet according to claim 2 is the laminated sheet according to claim 1, wherein a skin member is provided on the surface of the front side sheet, and a nonwoven fabric is provided on the surface of the back side sheet. It is characterized by.

  According to the invention described in claim 2, the laminated sheet is provided with a skin member on the surface of the surface-side sheet, so that the surface of the laminated sheet is changed to a wood grain tone by replacing the skin member with an appropriate member. You can freely change the design to metallic or carbon to improve aesthetics. In addition, the laminated sheet has a non-woven fabric on the surface of the back side sheet, which further improves the heat insulation, so it is suitable as an interior material such as a flooring material in vehicles and houses, or a plate material for heat insulation and cold insulation. It will be.

The laminated sheet according to claim 3 is the laminated sheet according to claim 1 or 2, wherein the laminated sheet has a corner portion on an outer peripheral portion, and the corner portion is formed with a notch portion. In addition, the end face of the notch is joined by a heating type or ultrasonic horn having a substantially semicircular shape when viewed from the side .

  According to the invention described in claim 3, the laminated sheet has a corner portion on the outer peripheral portion, and a notch portion is formed in the corner portion. In the laminated sheet, by joining the end surfaces of the notches, the corners are rounded and the end surfaces are easily joined.

  According to the laminated sheet according to the present invention, it is possible to provide a laminated sheet that has no pain when the outer peripheral portion is touched by hand and that has a good appearance at low cost.

Next, the best mode for carrying out the present invention (hereinafter referred to as “embodiment”) will be described with reference to FIGS. 1 to 11. Note that the laminated sheet according to the embodiment of the present invention is The top and bottom and front and back directions vary depending on the orientation. For convenience, the upper side and the lower side shown in FIG. 1 will be described as “front” and “back”, respectively.
FIG. 1 is an enlarged cross-sectional view of a main part showing a structure of a laminated sheet according to an embodiment of the present invention. FIG. 2 is a view showing the laminated sheet according to the embodiment of the present invention, and is an enlarged exploded perspective view of a main part showing a state before each member is laminated. FIG. 3 is a view showing the laminated sheet according to the embodiment of the present invention, and is an enlarged exploded perspective view of a main part showing a state when the respective members are laminated.

≪Laminated sheet≫
As shown in FIG. 1, the laminated sheet S sandwiches both surfaces of an intermediate sheet 1 composed of thin plates 2 and 3 having a large number of hollow convex portions 2 a and 3 a between a front surface side sheet 4 and a back surface side sheet 5. It is a hollow laminated board laminated | stacked on. In the laminated sheet S, a large number of airtight chambers 1b and 1c are formed by sealing the openings 2c and 3c of the hollow convex portions 2a and 3a having a substantially bottomed cylindrical shape with the front side sheet 4 and the back side sheet 5. Has been. Further, the laminated sheet S also forms the airtight chamber 1a by joining the bottom surfaces 2b, 3b of the hollow convex portions 2a, 3a to each other and covering the intermediate sheet 1 with the top sheet 4 and the back sheet 5. Is done. Thereby, the laminated sheet S is reduced in weight and has rigidity, water resistance, heat insulation, and moisture resistance.

  That is, the laminated sheet S includes a large number of hermetically sealed airtight chambers 1a, 1b, and 1c, so that even if it is crushed or bent, the bending rigidity, the compression rigidity, and the shock absorbing action are restored. It has. In addition, the laminated sheet S is light in weight because air is sealed in a number of airtight chambers 1a, 1b, and 1c, and the air blocks heat, moisture, and moisture, so that heat insulation and fire resistance are achieved. Excellent in water resistance and waterproofness. Moreover, the laminated sheet S can also be provided with sound absorption properties by, for example, providing a large number of communication holes (not shown) that communicate with the hermetic chamber 1a.

The outer peripheral portion S1 of the laminated sheet S is curved and formed in a semicircular shape when viewed from the side. In addition, the whole shape of the lamination sheet S is not specifically limited, What is necessary is just to form in a suitable shape according to shapes, such as a location to install.
The means for fixing the laminated sheet S is not particularly limited, and for example, screws, bolts, or the like can be applied.

  The laminated sheet S can be used for automobile interior materials, residential building materials, civil engineering materials, packaging materials, and the like. The laminated sheet S as an automobile interior material can be used, for example, for automobile carpets, trunk room covers, roof linings, and the like. The laminated sheet S as a building material for a house can be used as, for example, a flooring material, a flooring material, an underfloor material, a tatami core material, a housing frame ventilation material, a fireproof material, and the like. The laminated sheet S as a civil engineering material can be used, for example, as a core material for lightweight aluminum panels, wall materials for barns, waterproof sheets, heat insulation / cooling plate materials, and the like. The laminated sheet S as a packing material can be used for a returnable box for transportation, an export packing material, and the like.

≪Intermediate sheet≫
The intermediate sheet 1 forms a so-called honeycomb structure, and has a thin plate 2 having a number of hollow convex portions 2a protruding downward, and has a shape symmetrical to the thin plate 2 and protrudes upward. The thin plate 3 having a large number of hollow convex portions 3a is aligned and bonded together. The intermediate sheet 1 is formed by bonding the bottom surfaces 2b and 3b of the hollow convex portions 2a and 3a of the two thin plates 2 and 3, so that the numerous hollow convex portions 2a and 3a form a large number of airtight chambers 1b and 1c. is doing.

The intermediate sheet 1 is not limited to a so-called twin cone honeycomb material composed of two thin plates 2 and 3, but may be any member that constitutes a material corresponding to a honeycomb structure. But you can.
Here, the honeycomb structure is “Honeycomb”, that is, a honeycomb-like structure, and has a small hexagonal column shape (hexagonal fine hole), a truncated cone shape, or a round columnar shape (cylindrical fine hole). Refers to a continuous panel.

<Thin plate>
The thin plates 2 and 3 form the intermediate sheet 1 described above, and are formed of, for example, engineering plastics (abbreviated as engineering plastic), olefin resin, or the like. Engineering plastics is a synthetic resin with heat resistance, wear resistance, dimensional stability, electrical properties, etc., and the main ones are polycarbonate, polyamide, modified polyphenylene ether, polyethylene terephthalate, polybutylene terephthalate, polyacetal. And polyphenylene sulfide. Examples of the olefin resin include polyethylene, polypropylene, TPO (a mixture of PP and a rubber component), and the like.
Each of the thin plates 2 and 3 is made of a sheet having the same shape and having the truncated cone-shaped hollow convex portions 2a and 3a having the openings 2c and 3c on the outer wall surfaces 2d and 3d, for example, and formed at positions corresponding to each other. The bottom surfaces 2b and 3b of the hollow convex portions 2a and 3a are brought into contact with each other, and the contact portions are fixed in a manner such as adhesion or welding. On the outer surface side of the thin plate 2, the surface side sheet 4 is affixed, whereby the opening 2 c is closed and a large number of small airtight chambers 1 b are formed. On the outer surface side of the thin plate 3, the back surface side sheet 5 is affixed, whereby the opening 3 c is closed, and a number of small airtight chambers 1 c are formed.

The outer peripheries of the thin plates 2 and 3 are curved in a direction facing each other, the end faces 2e and 3e are in contact with each other, and are joined by welding means or the like.
The joining of the end faces 2e and 3e of the thin plates 2 and 3 and the joining of the end faces 4b and 5b of the front side sheet 4 and the back side sheet 5 are performed by, for example, ultrasonic welding or thermal welding.
In addition, in the laminated sheet S, if the end surfaces 4b and 5b of the front surface side sheet 4 and the back surface side sheet 5 arranged on the outside are welded, the end surfaces 2e and 3e of the thin plates 2 and 3 may not necessarily be welded. Good.

≪Surface side sheet≫
The surface side sheet 4 is affixed to the outer wall surface 2d of the thin plate 2 and covers the surface side of the intermediate sheet 1 in a sealed state. The sheet is formed of polypropylene, engineering plastics, olefin resin, or the like. Consists of.
The front side sheet 4 and the back side sheet 5 are formed by bending the outer peripheral parts 4a and 5a in directions facing each other, and the end faces 4b and 5b are joined by pressure bonding or welding.

≪Back side sheet≫
The back side sheet 5 is made of the same member having the same shape as the above-described front side sheet 4. That is, the back surface side sheet 5 is a sheet that is attached to the outer wall surface 3d of the thin plate 3 and covers the back surface side of the intermediate sheet 1 in a sealed state.

≪Manufacturing method≫
Next, the manufacturing method of the lamination sheet S is demonstrated with reference to FIGS.
FIG. 4 is a diagram illustrating a manufacturing process of a laminated sheet according to an embodiment of the present invention, in which (a) is a schematic diagram illustrating a process when a front sheet and a back sheet are attached to an intermediate sheet, (b). FIG. 4 is a cross-sectional view of a main part showing a laminated sheet in which a front side sheet and a back side sheet are bonded to an intermediate sheet, and (c) is a main part cross-sectional view showing a modification of the laminated sheet. FIG. 5 is a diagram illustrating a manufacturing process of a laminated sheet according to an embodiment of the present invention, in which (a) is a perspective view showing a state when the laminated sheet is cut, and (b) is a predetermined shape of the laminated sheet. The perspective view which shows the state when cut | disconnecting, (c) is a perspective view which shows the laminated sheet cut | disconnected by the desired shape, (d) is sectional drawing which shows a state when processing the outer peripheral part of a laminated sheet.

  The laminated sheet S is formed, for example, by laminating the thin plates 2, 3, the front side sheet 4, and the back side sheet 5 by a forming apparatus M as shown in FIG. That is, the thin plates 2 and 3, the front side sheet 4 and the back side sheet 5 are wound around bobbins B 1, B 2, B 3 and B 4, respectively, and the roll unit M 1 to which the thin plate 2 is fed and the roll unit to which the thin plate 3 is fed The roll part M3 into which M2 is opposed and the front side sheet 4 is fed and the roll part M4 into which the back side sheet 5 is fed are arranged to face each other. The roll portions M1 and M2 to which the thin plates 2 and 3 are fed are formed with tooth-shaped die portions for forming the hollow convex portions 2a and 3a, respectively, and heated to weld the thin plates 2 and 3 to each other. For this purpose, a heat source (not shown) is provided. As a result, when the thin plates 2 and 3 are unwound from the bobbins B1 and B2 and fed into the rotating roll portions M1 and M2, the hollow convex portions 2a and 3a are formed in the thin plates 2 and 3 by heating and pressing force. At the same time, the bottom surfaces 2b and 3b are melted and pressed to form the intermediate sheet 1.

  The forming positions of the mold parts formed on the roll parts M1 and M2 are arranged so as to correspond to each other, and the bottom surfaces 2b and 3b of the hollow convex parts 2a and 3a are moved along with the rotation of the roll parts M1 and M2. They are sent out in contact with each other and welded.

  Incidentally, the intermediate sheet 1 manufactured by the molding apparatus M has the hollow convex portions 2a and 3a having a truncated cone shape. For example, when the intermediate sheet 1 is continuously formed, the molds of the roll portions M1 and M2 are used. The hollow convex portions 2a and 3a can be easily removed from the portion.

The intermediate sheet 1 formed in this way is sent between the roll parts M3 and M4. Between the roll parts M3 and M4, the front side sheet 4 and the back side sheet 5 unwound from the bobbins B3 and B4 are fed and simultaneously attached to both sides of the intermediate sheet 1. Thereby, a laminated sheet S having a honeycomb structure as shown in FIG. 4B is completed.
Here, the laminated sheet may be a laminated sheet Sa composed of one thin plate 6 as shown in FIG.

Next, as shown in FIG. 5A, the laminated sheet S is cut into a square having an appropriate size.
Further, as shown in FIG. 5B, the laminated sheet S is formed into a laminated sheet S having a desired shape shown in FIG. In the upper mold 7 and the lower mold 8, an upper horn 9 and a lower horn 10 for welding as will be described later are provided.

  Subsequently, as shown in FIG. 5 (d), an upper horn 9 for welding for curving the outer peripheral portion 4 a of the surface side sheet 4 and welding the end surface 4 b to the end surface 5 b of the back surface side sheet 5, The laminated sheet S is sandwiched between the welding lower horn 10 for curving the outer peripheral portion 5a of the side sheet 5 and bringing the end surface 5b into pressure contact with the end surface 4b of the surface side sheet 4, and the end surfaces 4b and 5b are ultrasonically welded. The outer peripheral portion S1 of the laminated sheet S is curved and formed by vibration welding or thermocompression bonding. Then, as shown in FIG. 1, the outer peripheral portions 4a and 5a of the front surface side sheet 4 and the rear surface side sheet 5 are curved to cover the outer peripheral portions of the thin plates 2 and 3 so that the outer peripheral portion S1 is rounded. The laminated sheet S is completed.

  The upper horn 9 and the lower horn 10 have pressing portions 9a and 10a for bending the outer peripheral portions 4a and 5a of the front surface sheet 4 and the back surface sheet 5 so as to press the end surfaces 4b and 5b together. Is formed.

Further, the laminated sheet S thus completed is more rigid than the laminated sheet Sa formed by interposing one thin plate 6 as shown in FIG. 4C, and has a thickness t1 (see FIG. 4b). Can be thickened.
That is, the diameters of the bottom surfaces 2b and 3b of the hollow convex portions 2a and 3a of the laminated sheet S interposing two thin plates 2 and 3 shown in FIG. 4B are a, and the diameters of the openings 2c and 3c are c. The inclination angle of the hollow convex portions 2a, 3a is θ, the plate thickness of the laminate sheet S is t1, and the diameter of the opening 6c of the laminate sheet Sa interposing the single thin plate 6 shown in FIG. c, the inclination angle of the hollow convex portion 6a is set to be the same as that of the laminated sheet S, where θ.
Then, in the laminated sheet Sa shown in FIG. 4C, when the plate thickness t2 of the laminated sheet Sa is increased, the diameter b of the bottom surface 6b of the hollow convex portion 6a is shortened, so that the thin plate 6 and the back side sheet 5 are joined. Since the area is small, the rigidity is relatively weak, and there is a limit to increasing the plate thickness t2.
On the other hand, the laminated sheet S shown in FIG. 4B has two thin plates 2 and 3 interposed, so that the diameters a of the bottom surfaces 2b and 3b of the hollow convex portions 2a and 3a are long, Since the joining area of the bottom surfaces 2 b and 3 b is large, the rigidity of the laminated sheet S can be ensured. Therefore, the laminated sheet S is more rigid than the laminated sheet Sa, and the plate thickness t1 can be increased.

≪Other processing methods for the outer periphery of the laminated sheet≫
Next, another processing method for processing the outer peripheral portion S1 of the laminated sheet S will be described with reference to FIGS. In addition, the same thing as above-mentioned embodiment attaches | subjects the same code | symbol, and abbreviate | omits the description.
FIG. 6 is a diagram showing a state when the outer peripheral portion of the laminated sheet according to the embodiment of the present invention is processed, and (a) is welded by pressing a heating mold or an ultrasonic horn on the outer peripheral portion of the laminated sheet. FIG. 5B is a schematic plan view showing a state when a heating mold or an ultrasonic horn is slid and welded to the outer peripheral portion of the laminated sheet. 7A and 7B are diagrams showing a laminated sheet according to an embodiment of the present invention, in which FIG. 7A is an enlarged cross-sectional view of a main part showing a state before processing of the outer peripheral portion of the laminated sheet, and FIG. 7B is an outer peripheral portion of the laminated sheet. It is a principal part expanded sectional view which shows the state after processing. FIG. 8 is an essential part enlarged perspective view showing a completed state of the laminated sheet according to the embodiment of the present invention.

  As shown in FIGS. 6A and 6B, the laminated sheet S has an acute or obtuse corner S2 in the outer peripheral portion S1, and a notch S3 is formed in the corner S2. For example, when the laminated sheet S has a quadrangular shape as shown in FIGS. 6A and 6B, the laminated sheet S has four corners S <b> 2 and a notch S <b> 3 is formed in each.

  The notch portion S3 is a cut groove for forming the corner portion S2 along the curved surface when the corner portion S2 of the outer peripheral portion S1 is curved. The notch S3 is a groove cut at an appropriate angle such as an L shape or a V shape according to the curved surface in order to make the outer peripheral portion S1 easy to bend.

  When the outer peripheral portion S1 of the laminated sheet S is curvedly formed, for example, as shown in FIG. 6A, a heating die or an ultrasonic horn 11 described later is placed on the outer peripheral portion S1 of each side of the laminated sheet S with an arrow A Press in the direction and weld one side at a time.

  Further, as shown in FIG. 6B, when processing with a small heating mold or ultrasonic horn 12, or when forming the outer peripheral portion S1 of the large laminated sheet S in a curved manner, the outer periphery of each side of the laminated sheet S A heating mold or ultrasonic horn 12 is pressed against the part S1 in the direction of arrow A, and is slid along the surface of the outer peripheral part S1 in the direction of arrow B for welding.

  As shown in FIG. 7 (a), the heating type or ultrasonic horns 11 and 12 are formed by bending the outer peripheral portion S1 of the laminated sheet S, and the end surfaces 2e and 3e of the thin plates 2 and 3 and the surface side sheet 4 are formed. In addition, the processed surfaces 11a and 12a are formed in a substantially semicircular shape when viewed from the side so that the end surfaces 4b and 5b of the back sheet 5 can be brought into contact with each other.

  As shown in FIG. 7A, when the processing surfaces 11a and 12a of the heating mold or the ultrasonic horns 11 and 12 are pressed against the end surfaces 2e, 3e, 4b and 5b, first, the outer peripheral portions 4a and 5a are processed into the processing surface 11a. , 12a to bend and deform. Further, when the processed surfaces 11a and 12a are strongly pressed against the end surfaces 2e, 3e, 4b and 5b and heated or subjected to ultrasonic vibration, the end surface 2e and the end surface 3e are welded as shown in FIG. 7B. The end surface 4b and the end surface 5b are welded.

  Further, the corner portion S2 is guided by the curved surfaces of the processing surfaces 11a and 12a and is rounded by pressing the processing surfaces 11a and 12a of the heating mold or the ultrasonic horns 11 and 12 toward the notch portion S3. The inner end faces of the notch S3 are in contact with each other. Further, when the processed surfaces 11a and 12a are strongly pressed against the corner portion S2 and heated or subjected to ultrasonic vibration, the inner end surfaces of the notch portion S3 are welded to form a shape as shown in FIG.

  The present invention is not limited to the above-described embodiment, and various modifications and changes can be made within the scope of the technical idea. The present invention extends to these modifications and changes. Of course.

≪Modification≫
Next, a modified example of the laminated sheet will be described with reference to FIGS.
FIG. 9 is an enlarged cross-sectional view of a main part showing a modification of the laminated sheet according to the embodiment of the present invention. FIG. 10 is a view showing a modified example of the laminated sheet according to the embodiment of the present invention, and is an enlarged exploded perspective view of a main part showing a state before each member is laminated. FIG. 11 is a view showing a modified example of the laminated sheet according to the embodiment of the present invention, and is an enlarged exploded perspective view showing a main part when each member is laminated.

  The laminated sheet S described above is not limited to the one composed of the intermediate sheet 1, the front side sheet 4, and the back side sheet 5. As shown in FIGS. 9 to 11, for example, in the laminated sheet Sb, a sheet-like skin member 13 is provided on the surface side sheet 4 on the surface, and a nonwoven fabric 14 is provided on the surface of the back side sheet 5. It may be.

Since the laminated sheet Sb is provided with the skin member 13 on the surface of the surface side sheet 4, the surface of the laminated sheet Sb is changed to a suitable member by changing the surface member 13 to an appropriate member. You can change it freely.
In addition, since the laminated sheet Sb is further provided with the nonwoven fabric 14 on the surface of the back side sheet 5, the heat insulating property is further improved. Therefore, the laminated sheet Sb is used for interior materials such as floor materials in vehicles and houses, or for keeping warm and cold. It becomes the most suitable as a plate material.

  As mentioned above, although the example in the case of manufacturing the lamination sheet S (refer FIG. 1), Sa (refer FIG.4 (c)), and Sb (refer FIG. 9) was demonstrated, of the lamination sheets S, Sa, and Sb which concern on this invention The manufacturing method is not particularly limited to this. That is, when the material is a thermoplastic resin or a composition thereof, for example, it may be manufactured by injection molding, blow molding or the like.

  Moreover, the material which forms the lamination sheet S, Sa, Sb is not limited to what consists of a synthetic resin as mentioned above. For example, when used for an interior material such as an automobile, the laminated sheets S, Sa, and Sb made of the above-described synthetic resin having rigidity, shock absorption, sound absorption effect, and the like are optimal. And when using laminated sheet S, Sa, Sb as a building material for housing and a material for civil engineering, you may form with materials, such as a pulp, steel, stainless steel, aluminum, an aluminum alloy, and FRP.

It is a principal part expanded sectional view which shows the structure of the lamination sheet which concerns on embodiment of this invention. It is a figure which shows the lamination sheet which concerns on embodiment of this invention, and is a principal part expansion disassembled perspective view which shows the state before laminating | stacking each member. It is a figure which shows the lamination sheet which concerns on embodiment of this invention, and is a principal part expansion exploded perspective view which shows a state when each member is laminated | stacked. It is a figure which shows the manufacturing process of the lamination sheet which concerns on embodiment of this invention, (a) is the schematic which shows the process when a front side sheet | seat and a back side sheet | seat are affixed to an intermediate sheet, (b) The principal part sectional drawing which the lamination sheet which affixed the front side sheet | seat and the back surface side sheet | seat shows, (c) is principal part sectional drawing which shows the modification of a lamination sheet. It is a figure which shows the manufacturing process of the lamination sheet which concerns on embodiment of this invention, (a) is a perspective view which shows the state when cut | disconnecting a lamination sheet, (b) is when cutting a lamination sheet to a defined shape The perspective view which shows a state, (c) is a perspective view which shows the lamination sheet cut | disconnected by the desired shape, (d) is sectional drawing which shows a state when processing the outer peripheral part of a lamination sheet. It is a figure which shows the state when processing the outer peripheral part of the lamination sheet which concerns on embodiment of this invention, (a) is when welding by pressing a heating type or an ultrasonic horn to the outer peripheral part of a lamination sheet. A schematic plan view showing a state, (b) is a schematic plan view showing a state when a heating mold or an ultrasonic horn is slid and welded to the outer peripheral portion of a laminated sheet. It is a figure which shows the lamination sheet which concerns on embodiment of this invention, (a) is a principal part expanded sectional view which shows the state before the process of the outer peripheral part of a lamination sheet, (b) is the process after the process of the outer peripheral part of a lamination sheet It is a principal part expanded sectional view which shows a state. It is a principal part expansion perspective view which shows the completed state of the lamination sheet which concerns on embodiment of this invention. It is a principal part expanded sectional view which shows the modification of the lamination sheet which concerns on embodiment of this invention. It is a figure which shows the modification of the lamination sheet which concerns on embodiment of this invention, and is a principal part expansion exploded perspective view which shows the state before laminating | stacking each member. It is a figure which shows the modification of the lamination sheet which concerns on embodiment of this invention, and is a principal part expansion exploded perspective view which shows a state when each member is laminated | stacked. It is a figure which shows the structure of the outer peripheral part of the lamination sheet which has the conventional honeycomb structure, (a) is a principal part expanded sectional view which shows the state which pasted the skin material, (b) is the protrusion part of the skin. The principal part expanded sectional view which shows the state when cut | disconnected, (c) is a principal part expanded sectional view which shows the state when the outer peripheral part of a lamination sheet is cut | disconnected with a hot blade, (d) The outer peripheral part of the cut | disconnected laminated sheet is shown It is a principal part expanded sectional view which shows the state which sewed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Intermediate sheet 2, 3 Thin plate 2a, 3a Hollow convex-shaped part 2e, 3e, 4b, 5b End surface 4 Surface side sheet 4a, 5a, S1 Outer peripheral part 5 Back side sheet 13 Skin member 14 Nonwoven fabric S, Sa, Sb Laminated sheet S2 Corner S3 Notch

Claims (3)

A laminated sheet in which both sides of an intermediate sheet having a number of hollow convex portions are laminated so as to be sandwiched between a front side sheet and a back side sheet,
The intermediate sheet is made to match a thin plate having a large number of hollow convex portions projecting downward and a thin plate having a number of hollow convex portions projecting upward in a shape symmetrical to the thin plate. Pasted together,
The front side sheet and the back side sheet , and the upper thin plate and the lower thin plate are curved in a direction in which their outer peripheral portions face each other, and their end faces are joined. Laminated sheet. On the surface of the surface side sheet, a skin member is provided,
The laminated sheet according to claim 1, wherein a nonwoven fabric is provided on a surface of the back side sheet. The laminated sheet has corners on the outer periphery,
The corner portion is formed with a notch portion, and the end surface of the notch portion is joined with a substantially semicircular heating die or an ultrasonic horn when the processed surface is viewed from the side. The laminated sheet according to claim 2.

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