JP4339088B2 - Resin board terminal structure and terminal processing method - Google Patents

Description

  The present invention relates to a terminal structure of a resin board and a terminal processing method.

  As a resin board used for interior materials and exterior materials for vehicles and buildings, for example, a structure in which a core sheet having a vertical wall such as a honeycomb core is sandwiched between two cover sheets is known. . In some cases, a cover sheet such as a nonwoven fabric is bonded to the surface of the cover sheet.

Since this type of resin board contains a core sheet, its thickness is increased. As a terminal structure, the end part is once crushed to one side by a heat block to reduce the thickness. The crushed end portion is bent to the other surface side and welded to the end surface of the resin board (for example, Patent Document 1).
JP 2001-18308 A

  However, in such a conventional technique, since the end portion heated and crushed to one surface side is bent to the other surface side and joined to the end surface of the resin board, the one side surface side The bent side becomes a gentle bent part, but a sharp edge is left on the other side. In addition, since only one crushed end portion is bent and joined, if it is crushed thinly, only a terminal rigidity slightly higher than the rigidity of the resin board can be obtained.

  The present invention has been made by paying attention to such a conventional technique, and provides a terminal structure and a terminal processing method for a resin board in which edges are not left on both sides and higher terminal rigidity is obtained. is there.

  The invention according to claim 1 is a terminal structure of a resin board made of a thermoplastic synthetic resin in which a core sheet having a vertical wall is sandwiched between two cover sheets, and an end portion of the resin board is on an end surface side thereof It is the terminal structure of the resin board characterized by having the structure which folded and welded the edge part of the two cover sheets heated and pressed from the side.

  The invention according to claim 2 is the terminal structure of the resin board characterized in that the skin sheet is joined to the surface of the outer cover sheet.

  In the invention according to claim 3, the heat block is pressed from the end face side to the end portion of the resin board, the end portions of the two cover sheets are pushed open, and one end portion of the pushed open cover sheet is The resin board terminal processing method is characterized in that it is bent by one slide member and welded to an end face of the resin board, and then the other is bent and welded to one outer side by a second slide member.

  The invention according to claim 4 is the resin board terminal processing method, wherein the first slide member is made of a thin plate.

  According to invention of Claim 1, the edge part of the resin board is heated and pressed from the end surface side, the edge part of each cover sheet is pushed open to both sides, and the edge of the two cover sheets opened and opened Since the parts are folded and welded together, bent portions having a certain degree of curvature are formed on both sides, and no sharp edges are left. In addition, since the end portions of the two cover sheets are folded and welded together, even higher terminal rigidity can be obtained.

  According to the invention described in claim 2, since the skin sheet is bonded to the surface of the outer cover sheet, even if the skin sheet is provided, the skin sheet does not enter the folded portion between the ends of the cover sheet. Reliable welding is maintained.

  According to the third aspect of the present invention, the terminal treatment of the resin board can be performed with a relatively simple structure including the heat block and the two slide members.

  According to the fourth aspect of the present invention, since the first slide member for folding the inner cover sheet is made of a thin plate, heat is not lost when the inner cover sheet is bent, and reliable welding to the end surface of the core sheet is achieved. Is obtained.

  A thermoplastic synthetic resin in which a core sheet having a vertical wall is sandwiched between two cover sheets for the purpose of providing a terminal structure and a terminal processing method of a resin board in which edges are not left on both sides and higher terminal rigidity is obtained. The end of the resin board was made of a structure in which the ends of the resin board were welded by folding the ends of the two cover sheets that were heated and pressed from the end face side to each other. And realized.

  Hereinafter, the best embodiment of the present invention will be described with reference to FIGS. The resin board 1 of this embodiment has a three-layer structure as shown in FIGS. That is, the core sheet 2 having an uneven cross-section having a vertical wall by forming a cylindrical emboss is sandwiched between two cover sheets 3 and 4. The three-layer sheets 2, 3, and 4 are each made of non-breathable polypropylene (thermoplastic synthetic resin) and are welded to each other.

  The resin board 1 has a thickness of about 5 mm, and a non-woven skin sheet 5 is bonded to the surface of the upper cover sheet 4. Since the skin sheet 5 is in the form of a non-woven fabric, it has higher heat insulation than the cover sheets 3 and 4.

  Next, the terminal processing method of this resin board 1 is demonstrated. The resin board 1 is fixed on a table (not shown) by a pressing plate from above with the end portion protruding from the table. First, as shown in FIG. 3, the heat block 6 is pressed against the end portion of the resin board 1 from the end face side, and the end portions 3 a and 4 a of the two cover sheets 3 and 4 are moved up and down, respectively. Push open at right angles. At this time, the end of the intermediate core sheet 2 is also melted and opened up and down following the cover sheets 3 and 4. In FIG. 2 and subsequent figures, since the upper layer portion of the core sheet 2 is shown as an end surface, the upper layer portion appears on the drawing so as to open together with the end portion 4a of the upper cover sheet 4. When the portion where the bottom surface portion of the portion appears as a lower layer portion is illustrated, the lower layer portion appears on the drawing so as to open together with the end portion 3 a of the lower cover sheet 3.

  Next, as shown in FIG. 4, the heat block 6 is removed. When the heat block 6 is removed, the end portions 3a and 4a of the cover sheets 3 and 4 return to an angle of about 45 ° by the restoring force. At this time, the inner surfaces of the end portions 3 a and 4 a of the cover sheets 3 and 4 and the end surface of the core sheet 2 are in a melted state due to contact with the heat block 6.

  Then, as shown in FIG. 5, the first slide member 7 is raised from the lower side toward the end 3 a of the lower cover sheet 3. The first slide member 7 is made of a thin plate made of metal and has an L-shaped cross section. The first slide member 7 is raised and brought into contact with the end portion 3a of the lower cover sheet 3, while the end portion 3a is pushed up and bent at a right angle.

  Then, the inner surface of the end portion 3 a of the cover sheet 3 is brought into close contact with the end surface of the core sheet 2 to be in a welded state. Since both are in a molten state, the end portion 3a of the lower cover sheet 3 and the end surface of the core sheet 2 are reliably welded. The first slide member 7 descends immediately after ascending.

  When the end 3 a of the lower cover sheet 3 is bent by the first slide member 7, the first slide member 7 is made of a thin plate, so that the first slide member 7 may be brought into contact with the end 3 a of the cover sheet 3. The heat of the end 3a is not taken away. Therefore, before the end portion 3a of the lower cover sheet 3 is welded to the end surface of the core sheet 2, it is not cooled and solidified by contact with the first slide member 7, and the inner surface remains in a molten state. It welds to the end surface of the core sheet 2, and a reliable welding state is obtained.

  Since the bent portion 8 of the end portion 3a of the lower cover sheet 3 is formed in the process of bending the end portion 3a by the first slide member 7, as shown in FIG. It has a degree and does not become an edge.

  Next, as shown in FIG. 7, the second slide member 9 is lowered from the upper side toward the end 4 a of the upper cover sheet 4. The second slide member 9 has a block shape and is formed with a curved surface 11 for bending the upper bent portion 10 with a large degree of curvature. The second slide member 9 is lowered, the end portion 4a of the upper cover sheet 4 is pushed down together with the skin sheet 5, and is bent at a right angle. The second slide member 9 rises immediately after being lowered.

  When the end portion 4 a of the upper cover sheet 4 is bent downward by the second slide member 9, the inner surface of the end portion 4 a of the upper cover sheet 4 is aligned with the lower cover sheet 3 as shown in FIG. 8. The end portion 3a is in close contact with the outer side to be welded. In addition, the bent portion 10 of the upper end 4a is in a large curved state along the curved surface 11 formed on the second slide member 9, and does not become an edge.

  Although the 2nd slide member 9 is block shape, since the edge part 4a of the upper cover sheet 4 is bend | folded through the skin sheet 5 with high heat insulation, the heat of the edge part 4a is not taken. Therefore, before the end portion 4a of the upper cover sheet 4 is welded to the inner end portion 3a, it is not cooled and solidified, and the inner surface remains in a molten state with respect to the inner end portion 3a. It is surely welded. Thus, since each edge part 3a, 4a of the upper and lower cover sheets 3 and 4 is mutually folded and welded, the terminal part of the resin board 1 can obtain much higher terminal rigidity.

  In addition, since the skin sheet 5 is joined to the surface of the cover sheet 3 located on the outer side in the folded portion, even if the skin sheet 5 is provided, the skin sheet 5 is attached to the end portions 3a of the cover sheets 3 and 4, 4a does not enter into the folded portion, and reliable welding is maintained. Furthermore, since the terminal processing of the resin board 1 can be performed with a relatively simple structure including the heat block 6 and the two slide members 7 and 9, it is advantageous in terms of cost.

  In the above description, polypropylene is taken as an example of the thermoplastic synthetic resin. However, the present invention is not limited to this, and other olefin-based resins can also be used. Further, the core sheet 2 of the resin board 1 is not limited to the one in which the cylindrical embossed portion is formed as in the present embodiment, and may be a curved corrugated shape, and the honeycomb structure, the honeycomb core, and the honeycomb cushioning material. Various shapes called “etc.” may be used.

The exploded perspective view which shows the structure of the resin board which shows one Example of this invention. Sectional drawing which shows the resin board before the terminal process of FIG. Sectional drawing which shows the state which pressed the heat block to the resin board of FIG. Sectional drawing which shows the state which removed the heat block from the resin block of FIG. Sectional drawing which shows the state which raised the 1st slide member of FIG. Sectional drawing which shows the state which removed the 1st slide member from the state of FIG. Sectional drawing which shows the state which lowered | lowered the 2nd slide member of FIG. Sectional drawing which shows the resin board after the terminal process of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Resin board 2 Core sheet 3, 4 Cover sheet 3a, 4a End part 5 Skin sheet 6 Heat block 7 1st slide member 8 Bending part (lower side)
9 Second slide member 10 Bent part (upper side)
11 Curved surface

Claims (4)

A resin board terminal structure made of a thermoplastic synthetic resin in which a core sheet having a vertical wall is sandwiched between two cover sheets,
The resin board terminal structure is characterized in that the end portion of the resin board has a structure in which the end portions of two cover sheets that are heated and pressed from the end face side are folded and welded together. . The terminal structure of the resin board according to claim 1,
A terminal structure of a resin board, characterized in that a skin sheet is joined to the surface of an outer cover sheet. A terminal treatment method for a resin board made of a thermoplastic synthetic resin in which a core sheet having a vertical wall is sandwiched between two cover sheets,
The end of the resin board is pressed against the heat block from the end surface side, the ends of the two cover sheets are pushed open, and one end of the pushed open cover sheet is bent by the first slide member. A terminal treatment method for a resin board, characterized in that it is welded to an end face of the board, and then the other is bent and welded to one outside by a second slide member. It is the terminal processing method of the resin board of Claim 3, Comprising:
A resin board terminal treatment method, wherein the first slide member is made of a thin plate.

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