KR100721440B1 - The air chamber for air mat using blow molding - Google Patents

Abstract

The present invention relates to an air chamber for air mat using blow molding, comprising: a chamber body blow molded to have a closed space and the entire outer circumferential surface thereof being unfused; It was formed integrally with the chamber body and the injection hole for connecting the space of the chamber body with the outside; was provided with an air chamber for the air mat using the blow molding.

Therefore, the blow molding causes the chamber body and the injection port to be integrally formed without the fusion portion, thereby solving the air leakage problem of the fusion portion, and the manufacturing process is very simple, thereby reducing the product cost and allowing mass production.

Blow mold, first mold, second mold, air chamber, chamber body, inlet, recessed space nipple, air supply pipe

Description

The air chamber for air mat using blow molding

1 is a schematic perspective view showing a conventional air chamber

2 is a schematic perspective view of an air chamber according to the present invention;

3 is a cross-sectional view of FIG.

4 to 6 are schematic cross-sectional views sequentially showing a step of blow molding the air chamber according to the present invention.

FIG. 7 is a partial side cross-sectional view of FIG. 6

Figure 8 is a schematic separation perspective view showing a state connecting the air chambers manufactured by the present invention to the nipple and the air supply pipe

9 to 11 are schematic cross-sectional views showing the inside of the air supply pipe and its operation

12 is a schematic partial perspective view showing another embodiment of an air chamber

13 is a schematic partial separated cross-sectional view showing yet another embodiment of an air chamber.

* Description of the symbols for the main parts of the drawings *

20: blow mold

21: first mold

21a: first body shaping space 21b: first injection molding space

21d: first space molding protrusion

22: second mold

22a: 2nd body molding space 22b: 2nd injection molding space

22d: second space molding protrusion

30,60,70: Air chamber

31: chamber body 32, 62, 72: injection hole

33: depression space 34: depression surface

40,80: nipple

41: chamber coupling portion 42: air supply pipe coupling portion

50: air supply pipe

51: pipe 52: diaphragm

53: first compartment 54: second compartment

57: connector

The present invention relates to an air chamber for an air mat, and more specifically, because the fusion unit is not provided around the air chamber and the chamber body and the inlet are integrally molded, the manufacturing process and manufacturing cost are reduced, and the fusion site may leak or burst. It relates to an air chamber for an air mat using a blow molding without a mold.

The air mat used for various purposes is usually composed of one chamber, and the problem of the air mat is that the whole air mat bursts during severe external shock, so it can function as an air mat at all. It is not. This was a fatal problem associated with safety issues in an air tank having a single air chamber or an oil tank having a similar structure, but was solved by the appearance of so-called multi-tubes.

Since the multitubes have a plurality of independent air chambers, there is no communication between the air chambers, so that when the specific air chambers are blown, the remaining air chambers do not burst at the same time, thus maintaining the role of the air mat. It is also unusual that air flow between air chambers is limited, which significantly reduces the transition of shaking and is particularly useful when used as a bedding mat.

However, in spite of these advantages, it is pointed out that the air mat having an independent air chamber has to put air in and out of each air chamber, and accordingly, it takes a lot of time for air injection and air discharge.

Accordingly, the present applicant has developed an air injection device and an air mat using the device to simultaneously fill air in a plurality of air chambers to solve this problem.

Patent registration No. 0377326 (multi-cell tube and its manufacturing method), patent registration No. 0449994 (multi-air mat), utility model registration No. 0305992 (mattress using latex and air tube), patent Registration No. 0510006 (mattress) and Patent Publication No. 10-2005-0104571 (multi-chamber) (published: November 03, 2005), as described above to be able to simultaneously fill the plurality of air chambers with air The present invention relates to an air mat, and thus, in the state where a plurality of air chambers are arranged horizontally, the above-described air injecting devices are connected to the inlets to simultaneously inject and discharge air to the plurality of air chambers through the air injecting device. Made it possible.

FIG. 1 is a perspective view showing an exemplary air chamber 1 embedded in such an air mat, which is divided into a chamber body 2 and an inlet 3.

The chamber body 2 is made of a material having elasticity to absorb shocks well. For example, the chamber body 2 may be stretched to some extent by pulling both sides of the chamber body 2 without air in the air chamber 1. Have

On the contrary, the injection hole 3 of FIG. 1 is made of a hard material. If the material of the injection hole is a soft material with elasticity, such as the chamber body (2), it is not easy to couple the injection hole to the nipple. First, open the end of the soft injection hole with a separate tool and insert the end of the nipple into it. The joining operation becomes very complicated because the tool must be removed from the inlet and the inlet and nipple are combined.

On the contrary, when the injection hole 3 is hard as shown in FIG. 1, it is possible to make the coupling of the injection hole and the nipple relatively easy since the coupling is made by simply opposing them to the hard nipple end and then pushing them together, and thus, the conventional air chamber ( 1) while the chamber body 2 is soft having elasticity, the inlet 3 is made of a hard material.

However, the conventional air chamber 1 has a plurality of fusion portions 2c formed on the side surface 2a, the plane 2b, and the bottom surface (not shown) of the chamber body 2, and thus the chamber body 2 is hermetically sealed. Since the manufacturing process of the chamber body (2) has been increased and the various parts are thermally fused, the cost of the product has increased, and the welded part and its surroundings when the conventional air chamber 1 is used for a long time by such a fusion part Problems such as fires and air leaks are caused.

In addition, in order to fix the hard injection hole 3 to the soft chamber body 2, the fixed end portion 3a of the injection hole 3 should be fixed by heat-sealing the chamber body 2 so that the work process is added and As a result, there is a problem of an increase in the cost of the product, in particular, the fusion site of the chamber body (2) and the inlet (3) is the main site where the air leakage occurs, the air leakage problem often occurred in this fusion site when used for a long time.

SUMMARY OF THE INVENTION An object of the present invention for solving the above problems is to provide an air chamber for air mat using blow molding, which allows the chamber body and the inlet to be integrally molded without fusion.

Another object of the present invention is to provide an air chamber for a mat using a blow molding so that when the plurality of air chambers are arranged horizontally there is provided a space for installing the nipple and the air supply pipe between them.

Air chamber for air mat using the present invention blow molding for achieving the above object, in the air chamber is arranged in a plurality of horizontally and connected to the air supply pipe built in the air mat, the blow molded to have a closed space the entire outer peripheral surface Non-fused chamber body; And an injection port which is blow molded integrally with the chamber body and connects the space of the chamber body to the outside.

Another feature of the air chamber for the air mat using the blow molding of the present invention, a recessed space is formed on one side of the end of the chamber body, the depression on any one of the recessed surfaces of the chamber body to form the recessed space The injection hole protruding from the space is formed, and the component installation space is formed between the two injection holes when facing the end of the recessed space side of the two chamber bodies.

In the air chamber for the air mat using the blow molding of the present invention, a holding protrusion may be formed around the injection hole, and a male screw may be formed.

Therefore, the blow molding causes the chamber body and the inlet to be integrally formed at one time without the welding portion, thereby solving the air leakage problem of the welding portion, and the manufacturing process is very simple, which not only reduces the product cost but also enables mass production. As a result, excellent products can be supplied to many people at low cost.

Specific features and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings.

Figure 2 is a schematic perspective view showing an air chamber according to the present invention, Figure 3 is a cross-sectional view of Figure 2, the air chamber (air chamber) 30 is composed of a chamber body 31 and the inlet (32).

The chamber body 31 is blow molded to have an airtight space therein, and the entire outer circumferential surface thereof is non-fused, and the injection port 32 is blow molded integrally with the chamber body 31. It serves to connect the internal space of the chamber body 31 with the outside.

The air chamber 30 has a recessed space 33 formed at one end of the air chamber 30, and recessed surfaces 34 of the chamber body 31 forming the recessed space 33. The injection hole 32 protrudes on either side so as not to deviate from the range of the recessed space 33.

Therefore, when the end portions of the two air chambers 30 in which the recessed spaces 33 are formed are faced to each other, the nipples 40 and air supply pipes 50 to be described below are installed by the recessed spaces 33 as well. Space is provided.

4 to 7 are schematic cross-sectional views showing a mold for blow molding the air chamber 30 according to the present invention, and FIGS. 4 and 5 show a chamber molding tube 11 and a blow mold; 20 is a cross-sectional view showing a state in which the blow mold 20 is matched, and FIG. 7 is a partial side cross-sectional view showing the inside of the first mold 21 or the second mold 22.

In the first mold 21 of the blow mold 20, the first body molding space 21a is formed so that half of the chamber body 31 is molded therein, and half of the injection hole 32 is formed. The first injection molding space 21b is formed so that the first injection molding space 21b is formed, and the first body molding space when the first mold 21 and the second mold 22 to be described later are combined together. 21a is connected to the outside.

In addition, as shown in FIG. 7, the first space molding protrusion 21d protrudes into the first body molding space 21a at an upper edge of the first body molding space 21a of the first mold 21. The recessed space 33 of the air chamber 30 is formed by the first space forming protrusion 21d.

The second mold 22, which is paired with the first mold 21, has a second body molding space 22a formed therein so as to shape the other half of the chamber body 31 therein, and an injection hole ( The second injection molding space 22b is formed so that the shape of the other half of the 32 is formed.

In addition, the second space molding protrusion 22d protrudes into the second body molding space 22a in the upper corner portion of the second body molding space 22a of the second mold 22, so that the second space molding protrusion ( The remaining portion of the recessed space 33 of the air chamber 30 is formed by 21d).

Reference numerals 21c and 22c denote cooling water grooves formed in the first mold 21 and the second mold 22, and the air is formed by supplying cooling water when the air chamber 30 is molded in the blow mold 20. The chamber 30 is cooled.

The air chamber 30 formed by the blow mold 20 is made of a non-elastic material, and the air chamber 30 is filled with air without being stretched when the air chamber 30 is pulled by both sides of the air chamber 30. When the pressure is applied to the state, the appearance is deformed to some extent, but if the pressure is removed, the appearance can be restored again.

As the material of the air chamber 30 that satisfies such a condition, the air chamber 30 may be made of polyethylene (PETE) material which is mainly used for manufacturing PET bottles and buckets.

The air chamber 30 of the present invention manufactured as described above is arranged in plural horizontally and connected to an air supply pipe to be embedded in an air mat.

The air chamber using the blow molding of the present invention is manufactured as follows.

First, in order to manufacture the air chamber 30, which is blow molded to have a closed space and the entire outer circumferential surface of the chamber body 31 and the injection hole 32 integrally blow molded with the chamber body 31, A blow mold 20 having a shape of an air chamber 30 is prepared inside.

In the preparing step of the blow mold 20, the first body shaping space 21a is formed so that a part of the chamber body 31 is molded, and the first injection molding space 21b is formed so that a part of the injection hole 32 is molded. The first mold 21 is prepared, and the second body molding space 22a and the second injection configuration mold are formed in pairs with the first mold 21 to mold the remaining portions of the chamber body 31 and the injection hole 32. A step of preparing a second mold 22 having a space 22b is provided.

In the first mold 21 and the second mold 22 prepared as described above, the first space molding protrusion 21d protrudes inwardly at one corner of the first and second body molding spaces 21a and 22a. ) And the second space molding protrusion 22d are formed, respectively, and when the air chamber 30 is molded by the blow mold 20, the recessed space 33 is formed at one end of the air chamber 30.

When the blow mold 20 of the above-described form is prepared, the air chamber 30 is molded.

In the air chamber 30 forming step, a chamber forming tube 11 made of a non-elastic material is prepared as shown in FIG. 4, and the chamber forming tube 11 is formed into a first mold 21 and a second mold (as shown in FIG. 5). 22) so that the end of the blow pin 12 is positioned inside the chamber forming tube 11.

Then, as shown in FIG. 6, the first mold 21 and the second mold 22 are joined together, and blow air is blown into the blow pin 12 to form the air chamber 30 as shown in FIGS. 6 and 7. .

By the forming step of the air chamber 30, the air chamber 30 in which the chamber body 31 and the inlet 32 are integrally formed is molded, and the air chamber 30 formed as described above is fused to the entire outer circumferential surface thereof. Not formed, the chamber body 31 and the inlet 32 is integrally molded.

When the air chamber 30 is molded by the above-described blow molding, the molded air chamber 30 is cooled, and the cooling of the air chamber 30 is formed in the first mold 21 and the second mold 22. Cooling water may flow in the first coolant groove 21c and the second coolant groove 22c to cool the air chamber 30 inside the blow mold 20, and the air chamber may be formed in the blow mold 20. 30) can be cooled and then cooled by air cooling or a separate cooling device.

The air chamber 30 according to the present invention manufactured by the above method is arranged horizontally, as shown in FIG. 8, and then connected to the air supply pipe 50 and embedded in the air mat.

Here, when the recessed spaces 33 of the two air chambers 30 face downward, the inlets 32 of the two air chambers 30 are positioned to face each other, and the two opposed spaces 33 are opposed to each other. Between the injection holes 32, a space for installing the nipple 40 and the air supply pipe 50 is secured.

In such a state, the two chamber coupling portions 41 of the nipple 40 are respectively fitted into the opposite injection holes 32, and the air supply pipe coupling portion 42 below the nipple 40 is connected to the air supply pipe 50. The air chamber 30 is connected to the air supply pipe 50 because it is coupled to the 57.

The air supply pipe 50 includes a pipe 51 located in the recessed space 33 of the plurality of air chambers 30 arranged horizontally, as shown in FIGS. 9 to 11, and in the center of the pipe 51. The diaphragm 52 provided along the longitudinal direction to partition the space inside the pipe 51 into the first compartment 53 and the second compartment 54, and the air supplied from the outside to the first compartment 53. Connecting to the first compartment air supply port 55 for guiding, the second compartment air supply port 56 for guiding air supplied from the outside to the second compartment 54, and the air supply pipe coupling portion 42 of the nipple And a connector 57 for supplying air in the first compartment 53 into the air chamber 30.

The air supply pipe 50 is operated as shown in FIG. 10 when air is supplied to the first compartment air supply port 55 in the initial state as shown in FIG. 9, and as the air flows into the first compartment 53, the diaphragm is provided. As the 52 is expanded downward, the air passage in the air supply pipe 50 is secured to the maximum, and in such a state, the air flows into the air chamber 30 through the connector 57, the nipple 40, and the inlet 32. Supplied.

When an appropriate amount of air is supplied into the air chamber 30, the air supplied to the first compartment 53 of the air supply pipe 50 is blocked and air is supplied to the second compartment 54. Accordingly, the diaphragm 52 is expanded along the upper circumferential surface of the pipe 51 as shown in FIG. 11, and an expanded portion 52a is formed in the passage portion of the lower end of the first compartment air supply port 55 than the other portion. The air filled in the air chamber 30 is prevented from being discharged to the outside.

In the air chamber for air mat using the blow molding of the present invention, the chamber body 31 and the injection port 32 are integrally molded at once without fusion by blow molding.

Therefore, since the chamber body 31 and the inlet 32 are manufactured without a heat fusion process, the manufacturing process is shortened compared to the conventional one, and thus workability is improved, and the unit cost of the product can be greatly reduced, and many consumers It has the advantage of being able to supply large quantities with low cost products.

In addition, in the air chamber 30 of the present invention, the welded portion is not formed in the entire circumference thereof, so that the weak portion is not generated. That is, in the related art, the air leakage problem occurs when the air chamber is used for a long time by the fusion portion between the various parts formed in the air chamber and the chamber body and the inlet, whereas the air chamber 30 of the present invention is used at any part of the air chamber. Since the fusion | fusing part is not formed, the above-mentioned conventional problem is solved.

FIG. 12 is a schematic partial perspective view showing another embodiment of the air chamber, in which a plurality of gripping protrusions 63 may be further formed around the inlet 62 of the air chamber 60.

The holding projection 63 of the injection hole 62 is very useful when automatically assembling the air chamber 60 manufactured by the present invention with other components, the arm or tool in the form of a spanner injection hole 62 Located in the circumferential gripper 63 and pushed to the chamber coupling portion 41 of the nipple 40, the air chamber 60 is simply assembled to the nipple 40.

FIG. 13 is a schematic partial separation cross-sectional view showing another embodiment of the air chamber, in which a male screw 73 may be formed instead of the gripping protrusion 63 of FIG. 12 around the inlet 72 of the air chamber 70. In this case, the inlet 72 of the air chamber 70 is further provided with a cap 74 having a female screw 75 and a nozzle 76 to be coupled to the nipple 80 to be fastened to the male screw 73 of the inlet 72. ) And the nipple 80 can be conveniently combined.

12 and 13 described above are characterized in that the coupling between the air chambers 60 and 70 and the nipples 40 and 80 is improved, and other actions and effects are shown in FIGS. 1 to 11. Same as shown and described in the following.

The embodiments described above are merely to describe preferred embodiments of the present invention, the scope of the present invention is not limited to the described embodiments, and those skilled in the art within the spirit and claims of the present invention It will be understood that various changes, modifications, or substitutions by the present invention, such embodiments are to be understood as falling within the scope of the invention.

As described above, the present invention solves the air leakage problem of the welded part because the chamber body and the injection port are integrally formed without the welded part by blow molding, and the manufacturing process is very simple. This makes it possible to supply good products at low cost to many people.

Claims (4)

In the air chamber arranged in a plurality of horizontally arranged in the air mat connected to the air supply pipe, A chamber body blow-molded to have a closed space, the entire outer circumferential surface of which is not fused; Blow molding molded integrally with the chamber body and the inlet for connecting the space of the chamber body to the outside; Air chamber for the mat using the blow molding, characterized in that consisting of. The method of claim 1, A recessed space is formed at one end of the chamber body, The injection hole protruding in the depression space is formed on any one of the depression surfaces of the chamber body forming the depression space, The air chamber for the mat using the blow molding, characterized in that the component installation space is formed between the two inlets when the two ends of the chamber body facing the recessed space side. The method of claim 2, The injection port is an air chamber for a mat using the blow molding, characterized in that the grip projection is further protruded around the periphery. The method of claim 2, The injection port is an air chamber for a mat using the blow molding, characterized in that the male thread is further formed on the periphery.

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