JP2001088231A - Method for treating end of net material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for treating an end of a net material capable of improving an appearance by eliminating a sewing work. SOLUTION: An edge 15 of a net material 10 is folded toward an inside, and a folded surface 16 and its opposed surface 17 are fixed by using a vibration welding means. Accordingly, it is not necessary to conduct a sewing work as a prior art, and a treating work of the end 21 is facilitated. The method for treating the end of the material comprises the steps of thinning the end by the welding means to increase a density of a net organization and fixing a skin material by the welding means. Thus, rigidity of the end is enhanced, and an unnecessary elongation of the end can be suppressed. Therefore, a trouble of impairing mountability in a frame or the like due to the elongation of the end can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing a terminal portion of a net material having a three-dimensional structure.

[0002]

2. Description of the Related Art Seats having good cushioning properties, such as automobile seats, are usually provided with a spring material such as a coil spring or an S-shaped spring on a seat frame, and a pad material made of urethane or the like. And the surface thereof is covered with vinyl leather, cloth or the like. However,
The sheet thus formed has a large overall thickness including the spring material, and has a heavy weight. Except for those adopting a special mechanism such as forming a ventilation hole in the pad material, the ventilation is generally poor. A device employing a special mechanism for ensuring ventilation has a problem that the manufacturing cost is high.

As a sheet for improving the above-mentioned point, a sheet using a net material having a truss structure (three-dimensional structure) in which a front mesh layer and a back mesh layer are connected by a large number of piles is known. . Since it has a truss structure, it is an elastic structure that is difficult to set, and has excellent body pressure dispersion and absorption characteristics. Therefore, a large cushioning property can be exhibited even with a thin shape. Moreover, because of the net structure, it has a large number of voids and is excellent in air permeability without any special mechanism. Due to these advantages, the three-dimensional net material is not limited to the above-mentioned vehicle seats, furniture chairs used for learning desks and office desks, seat seats in movie theaters and the like, and seats. Other structures,
For example, it has been applied to tension and the like.

[0004]

The net material having a three-dimensional structure has the above-mentioned features, but has a surface mesh layer,
Since it is composed of a backside mesh layer and a pile, when it is used for the above-mentioned applications, simply cutting it to a predetermined size is likely to cause the yarns and fibers constituting these to be easily frayed, unattractive, and handled. Inconvenient.
Therefore, conventionally, in order to improve the appearance of the terminal portion and facilitate handling, the terminal portion is covered with a skin material and both are sewn.

[0005] However, the sewing operation is time-consuming and troublesome. In addition, since the terminal is simply sewn, the rigidity of the terminal does not change much as compared with the inner part thereof, and there is a problem that the elongation of the terminal impairs the attachment to a frame or the like. In addition, after sewing, a cover member that further covers the terminal portion may be attached, but when the cover member is attached, the insertion slit of the cover member is caught by the surface mesh layer or the back surface mesh layer and is difficult to insert. There was also a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method for processing a terminal portion of a net material, which can eliminate a sewing operation. Another object of the present invention is to provide a method for processing a terminal portion of a net material, which can increase the rigidity of the terminal portion and suppress the elongation of the terminal portion. Further, the present invention, when the cover member is mounted,
It is an object of the present invention to provide a method of processing a terminal portion of a net material capable of improving the mounting property.

[0007]

According to a first aspect of the present invention, there is provided a method for treating a terminal portion of a net material, comprising a front mesh layer and a back mesh layer. A method for processing the end portion of a net material having a three-dimensional structure formed by combining a back mesh layer with a number of piles, wherein the edge is turned inward,
The folded surface and the facing surface facing the folded surface,
It is characterized by being fixed by vibration welding means.

According to a second aspect of the present invention, there is provided a method for processing a terminal portion of a net material according to the first aspect, wherein the folded surface and the facing surface facing the folded surface are bent. After being fixed by vibration welding means at a position more inwardly spaced than that, a hollow cover member having a slit along the longitudinal direction is disposed so as to sandwich the fixed portion between the slit forming ends. It is characterized by the following.

According to a third aspect of the present invention, there is provided a method for processing a terminal portion of a net material according to the first or second aspect, wherein the edge is turned inward from the step of turning the edge inward. In an optional step until the cover member is mounted, a step of disposing a core material for maintaining a shape between the folded surface and the opposing surface is provided.

According to a fourth aspect of the present invention, there is provided a method for treating a terminal portion of a net material, comprising a front mesh layer and a back mesh layer, and the front mesh layer and the back mesh layer are connected by a number of piles. A method for treating a terminal portion of a net material having a three-dimensional structure, wherein a skin material is laminated on at least one surface of the terminal portion, and the skin material is fixed to the lamination surface by vibration welding means.

According to a fifth aspect of the present invention, there is provided a method of processing a terminal portion of a net material according to the fourth aspect, wherein the terminal portion is processed so as to be reduced in thickness by vibration welding means. After the step of reducing the density of the net structure, a skin material is laminated on at least one surface of the terminal portion, and the skin material is fixed to the terminal portion by vibration welding means.

According to a sixth aspect of the present invention, there is provided a method for processing a terminal portion of a net material according to the fifth aspect, wherein the surface material is wider than a width of the terminal portion. The edge of the skin material is arranged along the edge of the net material, and after being subjected to vibration welding in a developed state, the portion protruding inward from the vicinity of the edge is folded back and further subjected to vibration welding. .

According to a seventh aspect of the present invention, there is provided a method for treating a terminal portion of a net material, comprising a front mesh layer and a back mesh layer, and the front mesh layer and the back mesh layer are connected by a number of piles. A method of processing a terminal portion of a net material having a three-dimensional structure, wherein a portion spaced inward from an edge is processed into a groove shape so as to be reduced in thickness by vibration welding means, thereby forming a net structure. The method is characterized in that a step of increasing the density and a hollow cover member having a slit extending in the longitudinal direction are disposed so as to sandwich a thinned portion in the step between the slit forming ends.

According to an eighth aspect of the present invention, there is provided a method for processing a terminal portion of a net material according to the seventh aspect, wherein a portion spaced inward from an edge is formed. After performing the above-described process of forming a groove so that the thickness becomes thinner by the vibration welding means to increase the density of the net structure, the vibration welding means applies the vibration welding means to a portion between the thinned portion and the edge in the process. It is characterized in that a skin material is fixed, and thereafter, the cover member is provided.

According to a ninth aspect of the present invention, there is provided a method of processing a terminal portion of a net material according to the seventh or eighth aspect, wherein the method comprises the steps of: Is characterized in that the density of the net structure between them is more densely formed in advance than the part inside the net structure.

According to a tenth aspect of the present invention, there is provided a method for treating a terminal portion of a net material, comprising a front mesh layer and a back mesh layer, and the front mesh layer and the back mesh layer are connected by a large number of piles. A method of processing a terminal portion of a net material having a three-dimensional structure, wherein a terminal portion having a predetermined width from the edge toward the inside is processed by vibration welding means so as to be reduced in thickness. A step of increasing the density, a step of laminating a skin material on the terminal portion, and a step of fixing the skin material to the terminal portion by vibration welding means,
Forming a cover member by injection molding on the skin material fixed in the above step.

According to an eleventh aspect of the present invention, there is provided a method for treating a terminal portion of a net material according to the tenth aspect, wherein the surface material is provided with a raised portion. The skin material is fixed by vibration welding means while the raised portion of the portion is raised without being crushed.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings. First, an outline of a net material 10 having a three-dimensional structure to be processed according to the present invention will be described with reference to FIGS. As shown in the cross-sectional view of FIG. 1, the net material 10 has a three-dimensional structure including a front mesh layer 11, a back mesh layer 12, and a large number of piles 13 connecting the front mesh layer 11 and the back mesh layer 12. Truss structure (three-dimensional structure).

For example, as shown in FIG. 2, the surface mesh layer 11 is formed from a twisted yarn obtained by twisting a thin yarn into a structure having a honeycomb-like (hexagonal) mesh. As shown in FIG. 3, the twisted yarn obtained by twisting a thin yarn is formed by rubber knitting, and has a structure having a mesh (fine) smaller than the honeycomb-shaped mesh of the surface mesh layer 11. The pile 13 is formed of fibers or yarns, and is woven between the front mesh layer 11 and the back mesh layer 12 so that the front mesh layer 11 and the back mesh layer 12 maintain a predetermined interval. A predetermined rigidity is given to the net material 10 which is a three-dimensional mesh knit. Note that, here, the layer having the honeycomb-shaped mesh is used as the front surface (for example, the surface in contact with the human body when used as a cushion material for a seat), but this is used as the back surface, and the layer having a small mesh is used as the front surface. You can also. Further, as shown in Table 1 described later, it is of course possible to adopt a honeycomb shape or a mesh shape other than fine as the mesh layer structure.

The material constituting the net material 10 is preferably a thermoplastic resin, which can be formed into a fibrous form and which can exhibit the strength required when it is made into a woven fabric and used for a predetermined application (such as a sheet material). Should be fine. For example, thermoplastic polyester resins such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), polyamide resins such as nylon 6, nylon 66, and polyolefin resins such as polyethylene and polypropylene. Alternatively, a resin obtained by mixing two or more of these resins can be used.

The thickness of the pile 13 is 380 d
Above, preferably 600d or more. This allows
For example, the load of the occupant applied to the net material 10 used as the cushion material of the seat is reduced by the mesh layers 11 and
Can be supported by the deformation of the mesh and the falling of the pile 13, and a flexible structure without stress concentration can be obtained.

For reference, Table 1 shows some examples of materials that can be used as the net material 10 and their physical properties.

[0023]

[Table 1]

In Table 1, "d" represents denier,
1d is a unit of thickness when one gram of yarn is pulled 9,000 m, for example, 220d is a yarn of a thickness when one gram of yarn is pulled 9,000 / 210 = 42.9 m. “F” represents a filament and is a unit indicating how many thin yarns the yarn is composed of, for example, 70
f means that one thread is composed of 70 thin threads. The tensile strength “kg / 5 cm” is the strength when a 5 cm wide one is pulled. "Parallel" of pile organization
Indicates a state where the piles 13 connecting the front mesh layer 11 and the rear mesh layer 12 do not intersect when viewed from the side, and “cross” indicates a state where they intersect when viewed from the side.

Next, a terminal processing method according to the first embodiment will be described with reference to FIGS. First,
The end 15 of the net material 10 is folded inward, and the folded surface 16 and the facing surface 17 facing the folded surface 16 are fixed by vibration welding means. Fixing part 18
Are located at predetermined intervals inward of the bent portion 19. By fixing in such a position, a bulge 20 is formed along the outer periphery of the net member 10 as shown in FIGS. 4 and 5, and the appearance of the terminal portion 21 is improved. Note that the terminal portion 21 refers to a range of a predetermined width from the fixing portion 18 to the bent portion 19.

The fixing portion 18 constituting the terminal portion 21 is a portion where the folded surface 16 and the opposing surface 17 are fixed by vibration welding.
Each other, the surface mesh layer 11 and the pile 13, the back mesh layer 12 and the pile 13, or the front mesh layer 11 and the back mesh layer 12 are mutually bonded to be thin. As a result, the fixing portion 18 has a substantially plate-like shape, a small gap, little cushioning, and high rigidity. Therefore, the terminal portion 21 including the fixing portion 18 is prevented from being stretched, so that the assembling property to the frame or the like is improved. Further, since the edge 15 is folded back inward and fixed, the operation time is shorter and the operation is easier as compared with the conventional terminal processing method by sewing.

Here, the reason why the vibration welding means is employed in this embodiment is that the net material 10 has a complicated three-dimensional structure having the surface mesh layer 11, the back surface mesh layer 12, and the pile 13 as described above. This is because such a complicated structure is suitable for being reliably welded and processed into a high-density and thin shape. The surface mesh layer 11, the back surface mesh layer 12, and the pile 13 have the same melting point as long as the material is the same, but it is also related to the number of fibers constituting them. For example, when the pile 13 is a monofilament and the front mesh layer 11 and the back mesh layer 12 are multifilaments, the pile 13 composed of the monofilament is melted by vibration welding.

Next, a second embodiment of the present invention will be described with reference to FIG. Also in the present embodiment, first, similarly to the first embodiment, the edge 15 is folded inward, and the folded surface 16 and the opposing surface 17 are fixed by vibration welding. In addition, the fixing portion 18 also
Similarly to the embodiment, the end portion 21 having the bulge 20 along the outer periphery of the net material 10 is formed at a position spaced a predetermined distance inward from the bent portion 19.

After the terminal portion 21 is formed, the cover member 30 is attached. As shown in FIG. 6, a core member 20a holding the shape of the bulge 20 is attached so that the cover member 30 is not easily removed. It is preferable to arrange between the turning surface 16 and the opposing surface 17. The timing at which the core material 20a is arranged is arbitrary, and the core material 20a may be arranged when the edge 15 is folded inward,
After the edge 15 is folded back, for example, it may be inserted after vibration welding. The cover member 30 is hollow and formed in a pipe shape having a substantially semi-elliptical cross section, and a slit 31 is formed on one end face along the longitudinal direction. At the time of mounting, the fixing portion 18 is slid so as to be located between the slit forming ends 31a and 31b opposed to each other with the slit 31 interposed therebetween, and the bulge 20 which is a part of the terminal portion 21 is slid into the hollow portion 32 And accommodate it.
At this time, according to the present embodiment, the slit forming end 31a,
31b comes into contact with the surface of the fixed portion 18 to which the vibration welding is applied. The surface of the fixed fine portion 18 is smoothened by the vibration welding, and has a lower friction coefficient than before the vibration welding. . Therefore, the operation of slidingly inserting the cover member 30 is extremely easy. When such a cover member 30 is attached, the bulge 20 can be hidden by the cover member 30, so that the appearance is further improved.

FIG. 7 is a diagram for explaining a third embodiment of the present invention. In the present embodiment, first, a portion having a predetermined width from the edge 15 corresponding to the terminal portion 21 toward the inside is piled with the piles 13, the surface mesh layer 11 and the pile 13, and the back surface mesh layer 12 by vibration welding. The pile 13 or the surface mesh layer 11 and the back surface mesh layer 12 are joined to each other and processed so as to be thin. Since the piles 13 are joined to each other to reduce the thickness, the density of the net structure becomes denser than other portions, the rigidity is increased, and the extension of the terminal portion 21 is suppressed as compared with the inside portion. Will be done.

Next, in the present embodiment, the terminal 21
Then, the skin material 23 is laminated and fixed by vibration welding means. Thereby, the rigidity of the portion where the skin material 23 is fixed is further increased. In order to further increase the rigidity and maintain the balance of the shape, as shown in FIG. 7, the skin material 23 may be fixed to both the surface mesh layer 11 side and the back surface mesh layer 12 side. preferable. Further, a non-woven fabric or the like can be used as the skin material 23, and any material can be used as long as it can be vibration-welded to the net material 10 made of the above-described materials. In particular, a material made of the same material as the net material 10 is used. It is preferable to use

Further, the skin material 23 referred to here is the terminal portion 2.
When it is laminated on the terminal 1, it also functions as a decorative member covering the terminal portion 21. In order to effectively exert such a function, not only one skin material 23 is fixed to the terminal portion 21 but also a material having a width larger than that of the terminal portion 21 is used as the skin material 23. After the two edges are vibration-welded so that the edge 23a of the wire is substantially along the edge 15 of the net material 10,
It is preferable that the portion protruding inward from the terminal portion 21 is folded outward, and furthermore, the folded portions 23b of the skin members 23 are vibration-welded to each other. Thereby, at the boundary between the portion inside the terminal portion 21 and the skin material 23, the skin material 2
Since the bent portion 23c appears instead of the cut line 3, the appearance is improved. In addition, since the skin material 23 is folded back, the cushioning property of the skin material 23 is also improved, and the feel when contacting the skin material 23 is further improved.

FIG. 8 shows a fourth embodiment of the present invention. Similar to the second embodiment, a terminal using a cover member 30 serving as a decorative member for improving aesthetic appearance. This is the method of processing the section.

In the present embodiment, first, the net material 1
The portions spaced apart from each other by a predetermined distance from the edge 15 of 0 to the inside are piled with each other, the surface mesh layer 11 and the pile 13, the back mesh layer 12 and the pile 13, or the front mesh layer 11 and the back mesh by vibration welding means. Tier 1
2 are joined to each other and processed so as to be thin, so that a groove-shaped thin portion 22 is formed. The thin portion 22 is formed by joining the piles 13 and the like to reduce the thickness, so that the density of the net structure becomes denser than other portions, and the rigidity is increased. The extension of the terminal portion 21 of the present embodiment up to the edge 15 is suppressed as compared with the portion inside the terminal portion 21.

Next, in the present embodiment, the thin portion 22
Then, a skin material 23 is laminated on a portion between the thin portion 22 and the edge 15 and fixed by vibration welding means. Thereby, the rigidity of the portion where the skin material 23 is fixed is further increased. In order to further increase the rigidity and maintain the shape balance, as shown in FIG. 8, the skin material 23 may be fixed to both surfaces of the front mesh layer 11 and the back mesh layer 12. preferable. Further, as the skin material 23, it is preferable to use a material made of the same material as the net material 10, as in the third embodiment.

A thin portion 22 is formed, and a skin material 23 is formed.
Then, the cover member 30 is attached.
The cover member 30 has a hollow rectangular cross section and a slit 31 formed on one side end surface. The thin portion 22 is sandwiched between opposite slit forming ends 31a and 31b from both sides. From thin part 22 to edge 1
5 is mounted so as to be accommodated in the hollow portion 32. Also in this case, the thin portion 22 where the slit forming ends 31a and 31b come into contact has a smooth surface by vibration welding, so that the cover member 30 can be easily slid and inserted.

When the cover member 30 is mounted, the skin material 23 is not essential, but from the viewpoint of increasing the rigidity of the terminal portion 21 and suppressing its elongation, the skin material 23 is used as described above. Are preferably laminated and fixed.

To further increase the rigidity, FIG.
As shown in (a) and (b), when forming the net material 10, it is preferable to knit a portion corresponding to the terminal portion 21 in advance so that the density of the net structure is high.

Various means are conceivable for knitting so that the density of the net structure at the portion corresponding to the terminal portion 21 becomes high. For example, the knitting interval of the pile 13 with respect to the surface mesh layer 11 and the back surface mesh layer 12 is considered. To
Means for reducing the spacing between adjacent piles 13 by making it smaller than the weaving spacing on the inner side of the terminal portion 21, a portion where the mesh size of the front mesh layer 11 and / or the back mesh layer 12 corresponds to the terminal portion 21 Means for knitting so as to be smaller only, the surface mesh layer 11 corresponding to the terminal portion 21, the back surface mesh layer 12, and / or the pile 13
Means for increasing the thickness of the fibers (monofilaments) forming the surface mesh, means for forming the surface mesh layer 11, the back mesh layer 12, and / or the pile 13 corresponding to the terminal portion 21 from yarn (multi-layer or twisted fiber), or Means for appropriately combining these means and the like can be given.

FIGS. 10 to 14 are views for explaining a fifth embodiment of the present invention, in which a cover member 30 as a decorative member is formed integrally with a terminal portion 21 by injection molding. It is.

More specifically, as shown in FIG. 10, first, the terminal portion 21 having a predetermined width from the edge 15 toward the inside is reduced in thickness by vibration welding similarly to the above embodiment. Tighten net structure and increase rigidity. Next, the surface of the terminal portion 21 is covered with a skin material 23 by vibration welding. By coating with the skin material 23, during injection molding,
The synthetic resin is prevented from entering the gap of the terminal portion 21 by the injection pressure. Further, the elasticity of the terminal portion 21 and the skin material 23 can prevent leakage of the synthetic resin due to variation in the clearance of the mold.

Next, the terminal portion 21 is set in a mold (not shown) and injection molded. As a result, since the formed cover member 30 is integrated with the terminal portion 21, the cover member 3 formed in advance by extrusion or the like as described above is used.
0 is less likely to come off as compared to the case where 0 is attached to the terminal unit 21.

In order to make it more difficult for the cover member 30 formed by injection molding to come off, as shown in FIG.
As shown in the above, it is preferable to use a material having a raised portion as the skin material 23 and to perform vibration welding while leaving a part of the raised portion 23d raised. Further, in FIG. 11, the raised portion 23d is left only on one side of the terminal portion 21, but FIG.
As shown in FIGS. 2 to 14, it is also possible to adopt a configuration in which both sides of the terminal unit 21 are left. That is, as shown in FIGS. 12 and 13, first, the terminal portion 21 is thinned by vibration welding to increase the density of the net structure, and the skin material 23 is laminated on the terminal portion 21. Next, the skin material 23 is vibration-welded on both surfaces of the terminal portion 21 except for the substantially central portion thereof.
Thereby, the skin material 23 is fixed in a state where the raised portion 23d remains on both surfaces. Then, as shown in FIG. 14, when the cover member 30 is formed by injection molding after being set in a mold, the raised portions 23 d remain on both surfaces of the terminal portion 21, so that the bonding is more firmly performed.

The terminal processing method for net materials according to the present invention is not limited to the above embodiment. For example, the shape of the cover member 30 shown in FIGS. 6, 8, 9, 10, and 14 is merely an example, and other shapes are naturally possible. Further, in the above description, only the fourth embodiment describes that the knitting of the net material 10 is performed in advance to knit the net structure of the portion constituting the terminal portion 21 so that the net structure of the portion is dense. However, it is also possible to increase the rigidity of the terminal unit 21 by adopting such means in other embodiments.

[0045]

As described above, the method for processing the end portion of a three-dimensionally structured net material according to the present invention has a step of processing using a vibration welding means, so that it is not necessary to perform a sewing operation as in the prior art.
The processing work of the terminal unit becomes easy. In addition, the terminal portion is thinned by the vibration welding means to increase the density of the net structure, and the step of fixing the skin material by the vibration welding means to increase the rigidity of the terminal portion and eliminate the need for the terminal portion. Large elongation can be suppressed. Therefore, it is possible to solve the problem that the elongation of the terminal portion impairs the attachment to a frame or the like. In addition, when the cover member is attached to the terminal portion for processing, the surface in contact with the cover member is smoothened by vibration welding, and the friction coefficient is reduced compared to before the vibration welding, so the cover member is smooth. Can be installed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a net material to be processed according to the present invention.

FIG. 2 is an enlarged view showing a surface mesh layer of the net material shown in FIG. 1;

FIG. 3 is an enlarged view showing a back surface mesh layer of the net material shown in FIG. 1;

FIG. 4 is a perspective view showing a part of the net material for explaining the terminal unit processing method according to the first embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a part of the net material for explaining the terminal processing method according to the first embodiment of the present invention.

FIG. 6 is a sectional view showing a part of a net material for explaining a terminal processing method according to a second embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a part of a net material for explaining a terminal processing method according to a third embodiment of the present invention.

FIG. 8 is a sectional view showing a part of a net material for explaining a terminal processing method according to a fourth embodiment of the present invention.

FIG. 9 is a view showing a preferred mode of a terminal unit processing method according to a fourth embodiment of the present invention, and FIG. 9 (a) is a cross-sectional view showing a part of a net material before terminal processing is performed; And
(B) is sectional drawing which shows some net materials after performing terminal processing.

FIG. 10 is a sectional view showing a part of a net material for describing a terminal unit processing method according to a fifth embodiment of the present invention.

FIG. 11 is a partial cross-sectional view of a net material showing a state where a skin material is fixed in a terminal part processing method according to a fifth embodiment of the present invention.

FIG. 12 is a partial perspective view of a net material showing a state where a skin material is fixed in a terminal processing method according to a fifth embodiment of the present invention.

FIG. 13 is a view showing a preferable mode of the terminal portion processing method according to the fifth embodiment of the present invention, and is a partial cross-sectional view of a net material in a state where a skin material is fixed.

FIG. 14 is a diagram showing a preferred mode of the terminal processing method according to the fifth embodiment of the present invention, and is a partial cross-sectional view of a net material in a state where a cover member is formed.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 net material 11 front surface mesh layer 12 back surface mesh layer 13 pile 15 edge 16 folded surface 17 facing surface 18 fixing portion 21 terminal portion 22 thin portion 23 skin material 30 cover member 31 slit

Continued on the front page F-term (reference) 3B150 BA01 CE00 3B154 AA07 AA08 AA09 AB24 BA49 BB62 BB70 BD20 DA18 DA30 4F100 AK41 AK48 BA03 BA06 BA10A BA10B BA43 DB07 DB15 DC15A DC15B DG04C DG06C DG11 DG13 EC16 GB33 DAGG

Claims (11)

[Claims] 1. A method for treating a net material having a three-dimensional structure, comprising a front mesh layer and a back mesh layer, wherein the front mesh layer and the back mesh layer are connected by a number of piles. A method of processing the end portion of a net material, wherein the edge is folded inward, and the folded surface and the opposing surface facing the folded surface are fixed by vibration welding means. 2. The method according to claim 1, wherein the folded surface and the opposing surface are separated by a vibration welding means at a position spaced inward from the bent portion. A method for treating a net material end portion, comprising: disposing a hollow cover member having a slit extending in a longitudinal direction after fixing, so as to sandwich the fixing portion between slit forming ends. 3. The method according to claim 1, wherein, in an optional step between the step of turning the edge inward and the step of attaching the cover member, the method further comprises: A method for treating a terminal portion of a net material, comprising a step of arranging a core material for maintaining a shape between a folded surface and a facing surface thereof. 4. A method for processing a net material having a three-dimensional structure, comprising a surface mesh layer and a back surface mesh layer, and combining the surface mesh layer and the back surface mesh layer with a number of piles. A method of treating a terminal portion of a net material, comprising: laminating a skin material on at least one surface of a terminal portion; and fixing the skin material to the laminated surface by vibration welding means. 5. The method for processing a terminal portion of a net material according to claim 4, wherein the terminal portion is processed by a vibration welding means so as to have a reduced thickness by a vibration welding means to reduce the density of a net structure. Laminate a skin material on at least one side of the terminal portion,
A method of processing a terminal portion of a net material, comprising fixing the skin material to the terminal portion by vibration welding means. 6. The method according to claim 5, wherein the surface material is wider than the width of the terminal portion, and the edge of the skin material is the edge of the net material. A method of processing the end portion of a net material, comprising: vibrating and welding in a deployed state, then folding back a portion protruding inward from the vicinity of an edge, and further performing vibration welding. 7. A method for treating a net material having a three-dimensional structure, comprising a front mesh layer and a back mesh layer, and combining the front mesh layer and the back mesh layer with a number of piles. A process in which the portions spaced inward from the edges are processed into grooves so as to reduce the thickness by means of vibration welding means to increase the density of the net structure, and slits along the longitudinal direction are formed. A method of processing a terminal part of a net material, comprising: arranging a hollow cover member having a thinned portion in the above-described step between slit forming ends thereof. 8. The method according to claim 7, wherein the portions spaced from the edges toward the inside are formed into grooves so as to be thinner by vibration welding means. After the above-mentioned step of increasing the density of the net structure, the skin material is fixed by vibration welding means to the part between the part thinned in this step and the edge, and then the cover member is provided. A method of processing a terminal portion of a net material, comprising: 9. The method according to claim 7, wherein the density of the net structure from the portion thinned in the step to the edge is smaller than that of the portion inside the thinner portion. A method for processing a terminal portion of a net material, wherein the terminal portion is also densely formed in advance. 10. A method for processing a net material having a three-dimensional structure, comprising a front mesh layer and a back mesh layer, and combining the front mesh layer and the back mesh layer with a number of piles. The terminal portion, which is a portion having a predetermined width from the edge toward the inside,
Processing to reduce the thickness of the net structure by processing to reduce the thickness by vibration welding means, laminating a skin material on the terminal portion, and fixing the skin material to the terminal portion by vibration welding means A method of processing a terminal portion of a net material, comprising: a step of forming a cover member by injection molding on a skin material fixed in the above step. 11. The method for treating a terminal portion of a net material according to claim 10, wherein the surface material is provided with a raised portion, and the raised portion is raised without crushing a part of the raised portion. A terminal portion of the net material, wherein the material is fixed by vibration welding means.