CN2156349Y - Sealing joint structure for air sealing type apparatus - Google Patents

Abstract

The utility model discloses a sealing joint structure for an air sealing type apparatus. Both ends of the face material of the sealing joint structure are connected via sewing, and air sealing strips are fixed to the inner side of the face material via heat seal or cementing lines at both sides of seaming traces. The stretched length of the air sealing strips between the heat seal lines or the cementing lines is longer than that of corresponding face material, and namely, the perimeter of an air sealing bag formed by the air sealing strips and the face material is larger than that of a protective bag formed by the face material. The protective bag bears pressure, and sewing seams can be sealed by the air sealing strips. Therefore, the air sealing type apparatus utilizing the sealing joint structure has high compressive strength and favorable air tightness.

Description

Sealing joint structure for air sealing type apparatus

The utility model relates to the structure that is tightly connected of air-tight utensil, particularly the structure that is tightly connected of the air-tight utensil that tightness and crushing resistance are all had higher requirements.

Some air-tight utensil for example air bed, floating mat, safety garment etc. has higher requirements to tightness, crushing resistance, so the seam that requires used plane materiel of making and processing to stay all has good air-tightness and pull resistance.Domestic general employing rubberized fabric is made the plane materiel of tightness utensil at present, because rubberized fabric is to do fabricbase with the material that terylen cloth, nylon taffeta, nylon fabric etc. have tensile strength, the last natural rubber of spraying is made then, so tightness is good, tensile strength is high, the rubberized fabric that cuts is made tightness as required to be connected, for example utilize glue face and the adhering junction of glue face of neoprene or hot vulcanization method, just can make the air-tight utensils such as air bed that tightness is good, compression resistance is higher the rubberized fabric suitable position.But, with neoprene that rubberized fabric is bonding more numerous with the adhesion technique operation of making the tightness seam, every bonding seam, need be through three brush coatings, the cyclic process of drying, and each circulation need be changed expense 10 minutes approximately, and in order to guarantee the quality of neoprene, require very high to the humidity of environment, temperature, dust control by ventilation etc. in the operating process, so the neoprene adhering method yields poorly, and is not suitable for mass production.As for using the hot vulcanization adhesive bonding method, because must once bonding shaping, be applicable to the product that bonding seam is less, for example rubber overshoes, hot-water bottle etc. are not suitable for the long products of seam such as air bed.In addition, the weight of rubberized fabric is heavier, and the rubber smell also is difficult to remove, and is not suitable for some air-tight utensil.Therefore, adopt composite material to make the air-tight utensil at present in the world, this composite material is to make base cloth with good clothes of tensile strength such as terylen cloth, nylon taffeta, nylon fabrics, make for the compound good soft plastic films such as PVC of tightness of going up of base cloth with the molten coating method of hot calender, in light weight, tightness is good, and material itself has certain tensile strength.The general heat seal process that adopts when making the air-tight utensil with this composite material makes the soft layer of moulding of composite material be bonded together with the soft layer of moulding, and is easy to process.But, because the stretch rate of base cloth, there is no directly firm joint less than the soft layer of moulding as innerliner between the base cloth, so when airbag aeration arrives certain pressure, base cloth and the soft layer of moulding can produce and peel off, even can produce cutter at seam crossing and cut the sample crack, influence airtight effect.Also there is same problem in the air-tight utensil of making of above-mentioned rubberized fabric because bonding be the glue face, no direct firm engagement be can't stand high pressure so equally also hold between the base cloth.And owing to all adopt heat seal or adhesion technique, product design is also restricted, in case local damage can not be keeped in repair.

In order to provide tightness and crushing resistance all good air-tight utensil, also can adopt polytetrafluoroethylmaterial material to make plane materiel, but polytetrafluoroethylmaterial material cost an arm and a leg, unless not so special requirement is difficult to promote the use of.

The purpose of this utility model is, a kind of structure that is tightly connected of air-tight utensil is provided, adopt this linkage structure, not only make simple and conveniently, and needn't use the teflon of high price, as long as the plane materiel of connected making air-tight utensil has certain tightness and tensile strength, the air-tight utensil of making just has good tightness and crushing resistance, material can delamination, and seam crossing is difficult for because of the high pressure gas leakage of ftractureing, if local damage also can be keeped in repair.

The structure that is tightly connected of the air-tight utensil that the utility model provides; two ends of the plane materiel of its connected air-tight utensil link to each other by sewing thread trace and form the protection utricule; inboard at plane materiel; be fixed with pneumatic seal by heat seal or the cementing line that is positioned at the sewing thread trace both sides; this pneumatic seal surrounds air-tight bag with the plane materiel in the heat seal or the cementing line outside; and the length of run of the pneumatic seal between heat seal or cementing line is greater than the length of run of corresponding plane materiel.

The linkage structure of the air-tight utensil that the utility model provides as mentioned above; because being linked to each other by sewing thread, plane materiel forms the protection utricule; inboard length of run by the pneumatic seal on heat seal or bonding being connected is again greater than the length of run of corresponding plane materiel; make the girth of the girth of the air-tight bag that pneumatic seal forms with the plane materiel in heat seal or the cementing line outside greater than the protection utricule; so when the air pressure in the air-tight bag raises; always bear pressure by the less protection utricule of girth; as long as service-strong sewing thread or increase sewing number of times; make sewing thread that enough tensile strength be arranged; tightness is good but the pneumatic seal pull resistance difference just can not bear pulling force, just can play good airtight effect.So needn't adopt the teflon of high price, and just can produce all good air-tight utensil of tightness, crushing resistance with the more honest and cleaner composite material of valency etc.So this kind structure that is tightly connected can be applicable to various tightness, the demanding air-tight utensil of crushing resistance.Connect because the protection utricule is sewing, easy to process, but the product of machining shape complexity, and if breakage is arranged, for example Li Mian pneumatic seal has breakage, takes sewing thread apart and just can repair.

Fig. 1 is the sectional drawing that a kind of embodiment of the present utility model is a kind of structure that is tightly connected.

Fig. 2 and Fig. 3 illustrate other two kinds of structures that are tightly connected respectively.

Further specify structure of the present utility model and effect thereof below in conjunction with accompanying drawing.

As shown in Figure 1, the plane materiel 1 of air-tight utensil is cut into by the PVC composite material, and its two end part 11,12 are fixedly linked in sewing thread trace 13 through sewing, make plane materiel 1 form a protection utricule (only illustrating the seam portion of protection utricule).Pneumatic seal 2a, the 2b that is cut into by airtight thin-film material is fixed on hot thread 21,22 with the two end part 12,11 of plane materiel 1 inboard (being the soft aspect of moulding) respectively by high frequency heat seal, two pneumatic seal 2a, 2b are connected in hot thread 23 by high frequency heat seal again, the pneumatic seal 2 that is connected as a single entity surrounds air-tight bag with the plane materiel 1 in hot thread 21,22 outsides, and, in the length of run of the pneumatic seal that fuses 2 between the hot thread 21,22 length of run greater than the plane materiel 1 between the hot thread 21,22.When being full of gas in the air-tight bag and being subjected to certain pressure, because the length of run of the plane materiel 1 between the hot thread 21,22 is less than the length of run of corresponding pneumatic seal, pressure is just born by plane materiel 1 and sewing thread trace 13 thereof, as long as this part plane materiel 1 and sewing thread trace 13 have enough fastness, pneumatic seal 2 just can not bear pressure, thereby can keep good airtight effect.For this reason, if adopt the structure that is tightly connected described in the utility model, as long as guarantee that plane materiel 1 has enough tensile strength and tightness, and use enough firm sewing thread or increase sewing number of times to make stitching that enough join strengths be arranged, pneumatic seal has good air-tightness, just can make the special good air-tight utensil of compression resistance.In addition not only easy to process because plane materiel 1 links to each other by sewing, can not be subjected to the restriction of aspects such as environment, length, and if pneumatic seal etc. damage to some extent, can keep in repair just take sewing thread trace apart.

Shown in Figure 1 only is an embodiment of the present utility model, and according to the needs of processing technology, the sewing Placement of plane materiel 1 also can be as shown in Figure 2, and promptly sewing thread trace 13 is exposed to the surface of plane materiel 1 fully.

In the above-described embodiments, two pneumatic seal 2a, 2b have been used, then with they thermal synthesis one, if the processing conditions permission also can only be used 1 pneumatic seal 2 as shown in Figure 3.

In the above-described embodiments, plane materiel 1 has used the PVC composite material, also can use the composite material that other tightness is good, tensile strength is high certainly, for example the PU composite material.Plane materiel 1 also can use the other materials that meets above-mentioned condition, for example also can use rubberized fabric, but when using rubberized fabric, above-mentioned heat seal at former hot thread 21,22,23 places just should change adhesive bonding method into, just be cementing line 21 this moment, 22 and 23, promptly adopt binders such as neoprene that the glue face and the glue face of plane materiel 1 are glued together.

Claims (1)

1, a kind of structure that is tightly connected of air-tight utensil, the continuous end (11) of two quilts that comprises the plane materiel (1) of air-tight utensil, (12), it is characterized in that, above-mentioned two ends (11), (12) by the continuous sewing thread trace (13) that forms of sewing thread, in heat seal or the cementing line (21) of the inboard of plane materiel (1) by being positioned at sewing thread trace (13) both sides, (22) fixing pneumatic seal (2), this pneumatic seal (2) and heat seal or cementing line (21), (22) Wai Ce plane materiel (1) is formed air-tight bag together, and, in heat seal or cementing line (21), the length of run of the pneumatic seal (22) (2) is greater than the length of run of corresponding plane materiel (1).

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