KR20180053083A - Manufacturing Method of Valve Member for Device for Preventing Bad Smell of Drainage Hole - Google Patents

Abstract

The present invention relates to a manufacturing method of a valve member for a device for preventing a bad smell of a drain. A valve member having a body unit and an opening part is manufactured by separately forming a first body forming one surface and a second body forming the other surface and then joining the first body and the second body to improve accuracy of a manufacturing shape and manufacturing easiness. Specifically, opening elasticity of the valve member can be further improved. In a process of manufacturing the first body and the second body, a separate jig pressing step and an aging step are undertaken after an injection molding process to improve formability and elasticity of the first body and the second body. In a process of joining the first body and the second body, an edge portion of the opening part is not joined and is maintained in a separated state to prevent damage to the opening part by torsional stress during an opening operation of the opening part to improve durability of the valve member.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve member for preventing malodor of a drain hole,

The present invention relates to a method for manufacturing a valve member for a malodor preventing device for a drain hole. And more particularly to a valve body having a body portion and an opening / closing portion, wherein the first body and the second body are separated from each other by a first body and a second body, In particular, during the process of manufacturing the first body and the second body, the opening and closing elasticity of the valve member can be further improved. After the injection molding process, a separate jig pressing step and an aging step are performed, It is possible to improve the moldability and elasticity of the first body and the second body and to keep the edge portions of the opening and closing portions in a separated state without being bonded to each other during the process of joining the first body and the second body, Which can prevent damage to the opening / closing part due to the opening of the valve member, thereby improving the durability of the valve member ≪ / RTI >

Generally, a drainage hole is formed at the widthwise edge of the road so that rainwater or the like of the road can be discharged. The drainage hole is connected to the drainage pipe, and rainwater of the road is discharged to the river through the drainage hole. At this time, a grill-shaped grating is seated at the inlet of the drain hole so as to prevent foreign matter and the like from entering the road without interfering with the flow of drain water such as rainwater.

However, such a grating can prevent the inflow of foreign matter having a relatively large size as a lattice structure, but it can not prevent the inflow of foreign substances having a relatively small size due to the nature of the lattice structure.

Therefore, various foreign substances introduced together with the effluent water are accumulated in the lower part of the drain hole, so that odor is generated from the drain port. Such odor gas is discharged to the atmosphere through the drain port to cause air pollution, Resulting in a serious deterioration of the surrounding living environment.

In order to solve these problems, in the prior art, a separate foreign matter prevention cover is attached to the inlet side of the drain hole, or a separate odor prevention cover is installed to block the odor generated from the drain hole. However, It is not easy to manufacture and installation work is not easy, and accordingly, the use of such devices is inconvenient, and thus it has not been popularized widely, and there is a problem that the malodor prevention function is also insufficient.

Korean Patent No. 10-0717297

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art, and it is an object of the present invention to provide a valve member having a body portion and an opening / closing portion separately from a first body constituting one face and a second body constituting the other face, The present invention provides a method of manufacturing a valve member for a malodor preventing device for a drain hole that can further improve the accuracy of the formed shape and easiness of fabrication.

Another object of the present invention is to improve the moldability and elasticity of the first body and the second body by performing a separate jig pressing step and an aging step after the injection molding process in the process of manufacturing the first body and the second body Which is capable of improving the opening and closing function of the valve member, thereby providing a method of manufacturing a valve member for a malodor preventing device for a drain hole.

It is still another object of the present invention to provide a method of manufacturing a semiconductor device in which the edge portions of the opening and closing portions are held in a separated state in the process of joining the separately manufactured first body and the second body, And a method for manufacturing a valve member for a malodor preventing device for a drain hole, which can prevent damage and improve the durability of the valve member.

It is still another object of the present invention to provide a method of joining a first body and a second body separately bonded to each other by joining a local region of the body through a high frequency welding process to prevent a decrease in elastic adhesion of the opening and closing portions, And a method for manufacturing a valve member for a malodor preventing device for a drain hole which enables a stable opening and closing function of the valve member.

The present invention relates to an air conditioner comprising a body and an opening and closing part extending from the lower end of the body to elastically contact both sides of the body, A method of manufacturing a valve member for a drain hole malodor prevention apparatus, comprising the steps of: forming a first body integrally formed on one surface of a body and an opening / closing member; and integrally forming a first body A body manufacturing step of fabricating the second body by using urethane or EVA material, respectively; And a joining step of joining the two side edges of the body with respect to the first body and the second body formed through the body making step through a high frequency welding process, wherein the opening and closing parts of the first body and the second body are formed at one side And the body is formed so as to be elastically contacted with each other in the entire region by elastic force in a state where the body is joined, and when the waste water having a reference amount or more flows into the space therebetween, The present invention also provides a method for manufacturing a valve member for a malodor preventing device for a drain hole.

In this case, the body forming step may include an injection step of injection-molding the first body and the second body by using a urethane or EVA material; A jig pressing step of compressing the first body and the second body formed through the injection step so that the opening and closing part is maintained in a bent state through a separate shape jig during a predetermined jig pressing temperature and a jig pressing time; And aging in which the first body and the second body are squeezed through the shape jig and aged at room temperature for a predetermined aging time after the jig pressing step.

In addition, the injection step may be performed by forming an air vent hole in the injection mold so that the air inside the injection molding space is discharged to the outside during the injection molding process.

In the injection step, the injection molding temperature may be set to 220 ° C, and the injection molding time may be set to 8 minutes.

In addition, in the jig pressing step, the jig pressing temperature may be set to 60 ° C to 90 ° C, and the jig pressing time may be set to 6 hours.

Also, in the aging step, the aging time may be set to 24 hours.

In addition, in the bonding step, the central region of the body of the first body and the second body may further be joined to each other through a high-frequency welding process in the lower region adjacent to the opening and closing unit.

In addition, the local regions further joined through the high frequency welding process in the first body and the second body may be formed adjacent to both side edges of the central region of the body.

According to the present invention, the valve body having the body portion and the opening / closing portion is separately formed and joined to the first body forming the one surface and the second body forming the other surface, thereby improving the accuracy of the shape and easiness of fabrication In particular, there is an effect that the elastic force of opening and closing action of the valve member can be further improved.

Further, in the process of manufacturing the first body and the second body, the molding and elasticity of the first body and the second body can be improved by performing the separate jig pressing step and the aging step after the injection molding step, The opening and closing function of the valve member can be improved.

In addition, in the process of joining the separately manufactured first body and the second body, the edge portions of the opening and closing portions are held in a separated state without being joined, whereby the opening and closing portions can be prevented from being damaged by the torsional stress So that the durability of the valve member can be improved.

Further, in the process of joining the separately manufactured first body and the second body, the local area of the body is further bonded through the high-frequency welding process, thereby preventing the deterioration of the elastic adhesion of the opening and closing portions, .

FIG. 1 is an exploded perspective view schematically showing the construction of a drain hole malodor prevention device according to an embodiment of the present invention, FIG.
2 is a cross-sectional view schematically showing an internal structure of a drain hole odor prevention device according to an embodiment of the present invention,
FIG. 3 is an operating state diagram schematically showing an operation state of a drain hole malodor prevention apparatus according to an embodiment of the present invention,
FIG. 4 is a view showing a manufacturing method of a valve member for a drain hole malodor prevention apparatus according to an embodiment of the present invention,
5 is a view schematically showing the shape of a valve member for a malodor preventing device according to an embodiment of the present invention;
FIG. 6 is a schematic view illustrating a joint portion of a valve member for a malodor prevention device according to an embodiment of the present invention; FIG.
7 is a cross-sectional view taken along the lines "AA" and "BB" in FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

First, a description will be made of an apparatus for preventing malodor of a drain, according to an embodiment of the present invention, with reference to FIGS. 1 to 3. FIG.

FIG. 1 is an exploded perspective view schematically showing the construction of a drain hole malodor prevention device according to an embodiment of the present invention, FIG. 2 is a sectional view schematically showing an internal structure of a drain hole malodor prevention device according to an embodiment of the present invention And FIG. 3 is an operational state diagram schematically showing an operation state of a drain hole malodor prevention apparatus according to an embodiment of the present invention.

The apparatus for preventing malodor of a drain port according to an embodiment of the present invention is a device for preventing odor generated from a drain port 10 mounted on a drain port 10 of a road, And a valve member 200 coupled to a lower end of the stationary member 100.

The stationary member 100 may be formed in the form of a frame made of a metal or a hard synthetic resin or the like. The support 110 may be formed at an edge portion of the stationary member 100 so that the stationary member 100 can be mounted on the drain port 10 of the road. A drain pipe 120 in the form of a hollow pipe is formed so that the discharged water passes through.

2, the lower end of the collecting case 20 can be mounted on the drain port 10. The supporting portion 110 of the receiving member 100 is seated in the collecting case 20, And can be configured in a form that is mounted. A separate sealing member 140 formed of a soft material is interposed between the supporting part 110 of the mounting member 100 and the collecting case 20 and inserted into a space between the receiving member 100 and the collecting case 20 It is possible to prevent foreign matter from entering and at the same time to block malodor.

In this manner, a separate grating 30 is seated on the upper portion of the mounting member 100 while the mounting member 100 is mounted. The grating 30 is formed in a lattice structure so that the drainage of the road can be inflow and outflowed. Through this lattice structure, foreign matter having a relatively large size can be prevented from entering. When the grating 30 is seated, the grasping member 100 is pressed by the weight of the grating 30 and is tightly coupled to the collecting case 20, so that its position is fixed even if there is no separate fastening means.

As described above, the support member 110 and the drainage unit 120 are formed in the mounting member 100, and drainage water on the road such as rainwater flowing into the drainage hole 10 through the structure is discharged to the drainage unit 120 . At this time, the discharge water flowing into the drain hole 10 is formed to be inclined toward the drainage part 120 between the support part 110 and the drainage part 120 so that it can be led to the drainage part 120 without remaining in the support part 110 An inclined portion 130 may be formed. The drain water flowing into the drain hole 10 can smoothly flow into the drain portion 120 along the slope portion 130 and be discharged to the lower portion.

The valve member 200 includes a body 210 coupled to a lower end of the drainage unit 120 to communicate with the drainage unit 120 of the mounting member 100 and a body 210 integrally formed at a lower end of the body 210 And an opening / closing part 220 for closing the lower end of the body 210 in such a manner that both side surfaces are brought into close contact with each other by self-elastic force. At this time, the opening and closing part 220 is formed so as to be bent in one direction by self-elastic force in a state in which both side faces are in contact with each other so as to close the lower end of the body part 210. A plurality of rivet coupling holes 211 may be formed at the upper end of the body 210 so that the rivets 150 can be coupled to the mounting member 100.

The valve member 200 includes a first body 201 integrally formed with the body 210 and the opening and closing part 220 and a body 201 integrally formed with the body 210 and the opening and closing part 220 And a second body 202 formed to correspond to the first body 201. That is, after the first body 201 and the second body 202 are separated from each other, the first body 201 and the second body 202 are bonded to each other at both side edges through a high-frequency welding process And may be fabricated to form one valve member 200.

At this time, the valve member 200 is made of an elastic or soft material such as urethane or ethylene-vinyl acetate copolymer (EVA). The body 210 is formed in a flexible shape according to the material properties, Can be held in contact with both side faces so that the inner space thereof is closed by the self-elastic force, and can be maintained in a shape bent in one direction.

According to this structure, since the valve member 200 is maintained in a state in which both side surfaces of the opening and closing part 220 are in close contact with each other and is bent in one direction, the odor generated from the lower part of the drain port 10 rises to the outside You can block coming.

In this valve member 200, when the discharge water flows more than a reference amount, the valve body 220 is released from the close contact state and the bent state by the self-elastic force of the opening / closing part 220, The opening and closing part 220 of the valve member 200 is opened to discharge the discharged water.

3 (a), the drainage water is discharged through the drainage part 120 of the mounting member 100. When the drainage part 120 (see FIG. 3 The drainage water discharged through the drainage portion 120 of the mount member 100 flows into the body 210 of the valve member 200 because the body 210 of the valve member 200 is coupled to the lower end of the valve body 200 . Since the opening and closing part 220 is formed at the lower part of the body part 210 by the self-elastic force so as to keep the both side surfaces in close contact with each other, the drain water flowing into the body part 210 of the valve member 200, As shown in FIG. 3 (a), it is stored in the inner space of the body 210 according to the closed state of the opening and closing part 220.

When the discharged water flows into the internal space of the opening and closing part 220 by the self weight of the discharged water and flows into the opening part of the opening and closing part 220 as described above, The bending state is released and changed in a downward straight line shape as shown in FIG. 3 (b). At the same time, the inflow amount of the drain water to the opening / closing part 220 is increased, The open / close portion 220 is released from the close contact state of the open / close portion 220 as shown in (c) of FIG. The number is smoothly discharged.

3 (b) and 3 (c), the bending state and the close contact state of the opening and closing part 220 are sequentially released as described above, Will occur almost simultaneously.

When the discharge water is completely discharged through this process, both sides of the opening and closing part 220 are brought into close contact with each other by the self-elastic force, and at the same time, the opening and closing part 220 returns to the bent shape.

Therefore, as described above, since the opening and closing part 220 of the valve member 200 is maintained in a state of being in close contact with the drain opening during normal operation, the malodor rising from the lower part of the drain opening is blocked And when the drain water such as rainwater flows in, the opening and closing part 220 is opened by the self weight and the pressure of the drain water, and the drain water can be smoothly discharged.

In particular, since the opening / closing part 220 maintains a bent shape in one direction due to its own elastic force, the end of the opening / closing part 220 is positioned to face the upper side or the horizontal direction, It is possible to more completely prevent the odor coming through.

In other words, if the opening and closing part 220 is not bent, the end of the opening and closing part 220 is directed to the lower side. In this case, Since the opening and closing part 220 is formed in a bent shape in the embodiment of the present invention, even if the close contact state of the opening end part of the opening / closing part 220 is slightly weakened, Therefore, the odor can not be directly raised between the side surfaces of the opening / closing part 220, and the odor can be completely blocked.

Particularly, the discharge water generally contains fine particles. When the discharge water is not completely discharged during the discharge of the discharge water and is caught in the opening / closing part 220 of the valve member 200, The both sides of the opening and closing part 220 are not brought into close contact with each other, and a space is formed between them, and the odor can be raised through the space. However, since the opening / closing part 220 according to an embodiment of the present invention is bent so that its end is directed to the upper side or the horizontal direction, even if a space is generated in the section of the opening / closing part 220 due to foreign substances, So that the malodor blocking function can be performed more completely.

Next, a method of manufacturing the valve member 40 for a drain hole malodor prevention apparatus described above will be described with reference to Figs. 4 to 7. Fig.

FIG. 4 is a view illustrating a method of manufacturing a valve member for a malodor preventing device according to an embodiment of the present invention in accordance with a process flow. FIG. 5 is a sectional view of a valve member for a malodor preventing device for a drain hole according to an embodiment of the present invention. 6 is a view schematically showing a joint portion of a valve member for a drain hole malodor prevention apparatus according to an embodiment of the present invention, and Fig. 7 is a cross-sectional view taken along line "AA" BB "of Fig.

The valve member 40 for a malodor preventing device according to an embodiment of the present invention includes a first body 201 integrally formed with one side of the body 210 and the opening and closing part 220, And a second body 202 integrally formed with the first body 201 so as to form the other surfaces of the first body 210 and the second body 220.

The method for manufacturing the valve member 40 includes a body making step S10 for manufacturing the first body 201 and the second body 202 using urethane or EVA material respectively and a body making step S10 (S20) joining the two side edges of the body 210 to the first body 201 and the second body 202 through a high frequency welding process.

5, the opening and closing parts 220 of the first body 201 and the second body 202 are formed so as to be bent in one direction. In addition, the body part 210, The opening and closing part 220 is elastically brought into close contact with each other in the entire area of the opening and closing part 220 by self-elastic force. At this time, the joining wings 203 for high-frequency fusion bonding may be formed on both side edges of the body 210 of the first body 201 and the second body 202.

In addition, in the joining step S20 of joining the first body 201 and the second body 202 to each other, both side edges of the body 210 are bonded through a high-frequency welding process, and the opening and closing parts 220 are bonded to each other Keep in a separate form.

Through the body making step S10 and the bonding step S20, the first and second bodies 201 and 202 are joined to each other to form one body part 210 And the opening / closing part 220 extending to the lower end of the body part 210 are not bonded to each other, but both side surfaces are in close contact with each other due to the self-elastic force.

According to this structure, when the discharged water flows into the space inside the valve member 40, it flows into the opening and closing part 220 side through the body part 210. The opening and closing part 220 is separated and separated from each other by the flow pressure of the drain water, And operates in an open state.

As described above, the first body 201 and the second body 202 are separately manufactured and then bonded to each other through a high-frequency welding process. This not only facilitates fabrication, but also forms the bent shape of the bent opening / It is possible to maintain the close contact state by the elastic force of the opening / closing part 220 better.

In addition, since the elastic force of the opening / closing part 220 can be satisfactorily maintained, the opening / closing function by the elastic force can be satisfactorily performed even if the edge part of the opening / closing part 220 is not joined at the joining step S20. In addition, by not joining the edge portions of the opening and closing part 220, the opening and closing part 220 can be easily opened in a state where the opening and closing parts 220 are separated from each other on both sides, and accordingly, it can be opened more quickly and accurately when the discharged water is introduced.

In addition, in the state where the edge portions of the opening and closing portions 220 are joined, a fine torsional load may act on the joint portions of the opening and closing portions 220 as the opening and closing portions 220 are opened and closed. By this repetitive action of the torsional load, The damage may occur to the second electrode 220. Therefore, by opening the edge portions of the opening / closing portion 220 without being joined, it is possible to prevent the torsional load from being damaged by the open / close operation of the opening and closing portion 220 through the opening.

The body making step S10 may include an injection step S11, a jig pressing step S12, and an aging step S13.

In the injection step S11, the first body 201 and the second body 202 are injection-molded using urethane or EVA material. The injection molding temperature is set to 220 ° C and the injection molding time is set to 8 minutes. And the injection molding thickness, i.e., the thicknesses of the first body 201 and the second body 202, may be set to 1.5 to 1.6 mm. In the injection step S11, an air vent hole (not shown) is formed in the injection mold so that the air in the injection molding space is discharged to the outside during the injection molding process. By thus discharging the internal air through the air vent holes, the injection molding quality of the first body 201 and the second body 202 can be improved.

The jig pressing step S12 compresses the first body 201 and the second body 202 formed through the injection step S11 so that the opening and closing part 220 is maintained in a bent state through a separate shape jig. At this time, the pressing time and temperature are set for a preset jig pressing temperature and a jig pressing time, the jig pressing temperature is set to 60 to 90 ° C, and the jig pressing time is set to 6 hours. By performing the jig pressing process during the jig pressing temperature and the jig pressing time, the first body 201 and the second body 202, which are urethane injection molded, are provided with molding and elasticity.

In the aging step S13, after the jig pressing step S12, the first body 201 and the second body 202 are squeezed through the shape jig and aged at a predetermined temperature for aging at a predetermined temperature . At this time, the aging time is set to 24 hours. The first body 201 and the second body 202 can be more stably resilient through the aging step S13.

The jig squeezing step S12 and the aging step S13 may be separate processes. However, after the jig squeezing step S12 is completed, the first body 201 and the second body 202 are separated from the shape jig The jig squeezing step S12 and the aging step S13 are successively performed in such a manner that the aging time is continuously maintained for 24 hours when the temperature is normal, .

The first body 201 and the second body 202 can be manufactured through the body making step S10. At this time, in the body making step S10, the first body 201 and the second body 202 The radius of curvature of the bending portion of the opening and closing part 220 of the display unit 202 may be set to 130 mm. When the numerical value of the radius of curvature is set to be larger than 130 mm, the elastic force of the opening / closing part 220 is relatively low, so that the elastic adhesion force is lowered and the closing property of the valve member 40 is lowered, Backflow may occur. On the contrary, if the radius of curvature of the bending portion of the opening and closing part 220 is set to be smaller than 130 mm, the elastic force of the opening and closing part 220 is relatively high to increase the elastic adhesion force, thereby lowering the openability of the valve member 40, The discharge may not be smooth, and foreign matter or the like may accumulate inside the valve member 40. The radius of curvature of the bending portion of the opening and closing part 220 is preferably set to 130 mm in consideration of the elastic contact force of the opening and closing part 220 and the flow pressure of the drainage water. .

In the joining step S20, as described above, the portions of the joining wings 203 formed on both side edges of the body portion 210 of the first body 201 and the second body 202 are subjected to a high frequency welding process The first body 201 and the second body 202 are joined to each other to form a body 210. [ At this time, the opening portions 220 of the first body 201 and the second body 202 keep the edge portions separated and not joined to each other. Of course, in this case, the first body 201 and the opening / closing part 220 of the second body 202 are kept in close contact with each other due to the elastic force.

As described above, it is possible to prevent the damage due to the opening and closing operation of the opening and closing part 220. In this case, the opening and closing part 220 is not bonded The elastic contact force of the opening and closing part 220 may be relatively lowered.

As shown in FIGS. 6 and 7, in the joining step S20, the first body 201 and the second body 202 of the body portion 210 of the second body 202, The opening and closing part 220 and the lower local area 204 in the central area can be further bonded to each other through a high frequency welding process. These local regions 204 may be formed adjacent to both side edge portions in the central region of the body 210.

In order to prevent such a decrease in the elastic adhesion force, the local area 204 of the body 210 of the area adjacent to the opening and closing part 220 may be reduced by the use of the valve member 40 for a long period of time. ) Can be bonded to the opening and closing part 220 indirectly by the high frequency welding process. In other words, the opening / closing part 220 integrally formed at the lower end of the body 210 receives an elastic force in a direction in which both side surfaces are in contact with each other due to the joining part of the local area 204, do.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: Drain 20: Collecting case
30: Grating 40: Odor prevention device
100: mounting member 110: support
120: drain part 130: inclined part
200: valve member 201: first body
202: second body 203: joint wing
204: local region 210: body portion
220:

Claims (8)

A drain port odor prevention device installed in the drain port of the road for blocking offensive odors and including a body portion and an opening / closing portion extending from the lower end of the body portion to elastically contact both sides thereof, As a method for manufacturing a valve member for a valve,
And a second body integrally formed to correspond to the first body so as to form the other surface of the body and the opening and closing part are made of urethane or EVA material, A manufacturing step of the body; And
A joining step of joining the opposite side edges of the body to the first body and the second body formed through the body making step through a high frequency welding process
Wherein the opening and closing parts of the first body and the second body are formed so as to be bent in one direction and are elastically contacted with each other in the entire area by the self-elastic force in a state where the body is joined, Wherein when the drainage water is introduced, the drainage port is formed in a separated form so as not to be connected to each other so as to be separated from each other.
The method according to claim 1,
The body-
An injection step of injecting the first body and the second body by using urethane or EVA material;
A jig pressing step of compressing the first body and the second body formed through the injection step so that the opening and closing part is maintained in a bent state through a separate shape jig during a predetermined jig pressing temperature and a jig pressing time; And
Wherein the first body and the second body are pressed through the shape jig and aged at a predetermined temperature for a predetermined aging time after the jig pressing step,
Wherein the valve member is formed of a metal material.
3. The method of claim 2,
Wherein the injection step is performed in such a manner that an air vent hole is formed in the injection mold so that the air inside the injection molding space is discharged to the outside during the injection molding process.
The method of claim 3,
Wherein the injection molding temperature is set to 220 DEG C and the injection molding time is set to 8 minutes in the injection step.
5. The method of claim 4,
Wherein the jig pressing temperature is set to 60 ° C to 90 ° C and the jig pressing time is set to 6 hours in the jig pressing step.
6. The method of claim 5,
Wherein the aging time is set to 24 hours in the aging step.
7. The method according to any one of claims 1 to 6,
In the bonding step
Wherein the central region of the body of the first body and the body of the second body is further joined to each other through a high frequency welding process in a lower region adjacent to the opening and closing portion.
8. The method of claim 7,
Wherein the local region further joined to the first body and the second body through a high frequency welding process is formed adjacent to both side edges of the central region of the body.

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