TWI731006B - Airbag unit and its manufacturing method and air cushion - Google Patents

Abstract

To provide an airbag unit, a manufacturing method and an air cushion that can make the cross-section of each airbag short in width and high in height, fully sink when expanded and contracted alternately, sleep comfortably, and easily line up in a row.

A single airbag unit (10) is formed by a plurality of airbags (1). When the airbag unit is manufactured, two sheets are linearly welded at a plurality of locations to form an airbag. In addition, the hanging part is welded to the middle part of the inside of the longitudinally elliptical airbag. Since a plurality of airbags are connected by a welded part, it is easy to arrange the airbags in a row to manufacture an air cushion, and the cost is low.

Description

Airbag unit and its manufacturing method and air cushion

The present invention relates to an air cushion with a plurality of independent airbags juxtaposed in the length direction of the cushion, and the air pressure of each airbag can be independently controlled, and particularly relates to an interactive expansion and contraction type air cushion suitable for the airbag to expand and contract alternately and repeatedly. Comfortable air cushion for sleeping.

The air cushion is divided into a plurality of air chambers (airbags) in order to perform the pressure switching of its unique action. In the air cushion described in Patent Document 1, four first to fourth sheets are superimposed, and three first to third airbags are formed up and down by spot bonding. In addition, the air pressure of the third airbag in the lower layer is maintained at a high pressure, and the first and second airbags are maintained at a low pressure. The air cushion described in Patent Document 2 joins two front and back sheets in the width direction of the mat to form a plurality of cylindrical air cells extending in the width direction of the mat. In addition, the air cushion described in Patent Document 3 is a plurality of independent airbags extending in the width direction of the cushion, and the ears formed at both ends of these airbags are connected to each other with a belt, and the airbag is arranged on the cushion. In the length direction. The airbag described in Patent Document 3 has an elliptical cross-sectional shape that is elongated upward and downward. The horizontal part of the suspension.

[Prior Technical Literature] [Patent Literature]

Patent Document 1 JP 2002-136396 A

Patent Document 2 JP 2007-082860 A

Patent Document 3 Japanese Patent Application Laid-Open No. 10-005289

However, in the prior art described in Patent Document 1, since four upper and lower sheets are joined in dots, the range of one air chamber covers the entire placement area of the air cushion. Therefore, the user of the air cushion When turning over during sleep and physical movement occurs, there will be a problem of large air flow, which hinders the comfort of the user.

In addition, as in Patent Document 2, by dividing the upper and lower sheets into a cylindrical shape, in an air cushion in which a plurality of airbags extending in the width direction of the cushion are juxtaposed in the length direction of the cushion, the cross section of the airbag The shape is circular, so the ratio of the height to the width of the cross section of the airbag is limited. Therefore, if a sufficient height is to be obtained, the width of the airbag becomes too wide, making it uncomfortable to sleep, and if the width of the airbag is reduced to alternately expand and contract to shrink a specific airbag, the height of the adjacent airbag is insufficient, so There are problems such as bottoming out, insufficient cushioning properties, and uncomfortable sleep.

On the other hand, as in Patent Document 3, in the air cushions in which a plurality of airbags are separated, each airbag is formed into an independent bag shape. Therefore, the suspension can be installed in the interior of the air chamber to form a longitudinally long elliptical cross section. And because the ratio of the height relative to the width of the cross section of the airbag can be increased, the width of the airbag that expands and shrinks alternately is reduced, and the comfort is good. The height of the airbag is increased and the airbag can sink deeper when it is reduced. However, since a plurality of cylindrical airbags are separated separately, in order to arrange these airbags in a row in a cushioned state, it is necessary, for example, to install a belt loop in the mattress cover, and fix the airbags while passing the loops. For the treatment of the hood. Therefore, the production cost becomes high. In addition, if the airbags are not arranged in a row with rings in this way, the airbags are often tangled, and the cushion cannot be inflated beautifully.

The present invention has been invented in view of this problem, and its purpose is: in an air cushion in which a plurality of independent airbags are juxtaposed in the length direction of the cushion, and the air pressure of each airbag can be independently controlled, the cross section of each airbag can be adjusted The airbag unit is short in width and high in height, and can sink fully when expanded and contracted alternately, is comfortable to sleep, and is easily lined up, and its manufacturing method and air cushion.

The airbag unit according to the present invention is characterized in that it has: an airbag, which is composed of a plurality of cylindrical bags formed by linearly joining two or more sheets at a plurality of positions; and a hanging part is joined to one side. The aforementioned sheet material and the front of each aforementioned airbag The inside of the cylindrical bag is separated up and down; and the closed end part closes the both ends of the airbag in the longitudinal direction of the tube.

The other airbag unit related to the present invention is characterized in that it has: a plurality of cylindrical bags, which are formed by sandwiching one sheet for the hanging part and linearly joining the two sheets at a plurality of positions; And the closed end part is to close the both ends of the tube length direction of the said cylindrical bag.

These airbag units may be configured such that the cylindrical bag is joined at a plurality of locations and divided into a plurality of airbags in the tube length direction, and the plurality of airbags are formed in the tube length direction.

In addition, for example, the closed end portion is formed by overlapping and joining the ends of the cylindrical bag lengthwise, and the overlapping portion is formed in the shape of the front end portion of the strap with a locking portion, which is used to make adjacent The locking portions of the airbags are engaged with each other to connect adjacent airbags.

The air cushion according to the present invention is characterized in that it is composed of any one of the airbag units described above, or is configured by juxtaposing any one of the airbag units in a direction perpendicular to the longitudinal direction of the airbag tube.

The method for manufacturing an airbag unit according to the present invention is characterized by: A pair of vertical molds separated and erected between the width of the airbag and a pair of adjacent vertical molds are used to arrange a plurality of pairs of lower mold members with a predetermined interval between them, and a pair of lower mold members respectively opposed to the above-mentioned vertical molds are arranged The manufacturing apparatus of the upper mold member of the vertical mold includes: placing the first sheet material for the airbag on the upper side of the lower mold member in a state where it is perpendicular between the vertical molds and between the adjacent pair of vertical molds , Place a plurality of second sheets for the hanging part on top of the first sheet on the vertical mold in a manner of being erected between the pair of vertical molds of the above-mentioned vertical mold, on the above-mentioned upper mold member The step of clamping the first sheet and the second sheet between the vertical mold and the vertical molds of the lower mold member to be joined; and between the vertical molds of the lower mold member facing the vertical molds The first sheet is lowered so that the first sheet between the adjacent pairs of vertical molds is positioned on the uppermost side, and the third sheet for the airbag is placed above the lower mold member, on the upper mold member. The step of clamping and joining the first sheet and the third sheet between the vertical mold and the vertical mold of the lower mold member.

The method of manufacturing another airbag unit according to the present invention is characterized in that a plurality of pairs are arranged with a predetermined space between a pair of standing molds separated and erected between the width of the airbag and a pair of adjacent standing molds. The lower mold member, and the manufacturing apparatus of the upper mold member respectively facing the vertical molds of the above-mentioned vertical mold, the first support portion for holding the sheet is provided in the interior of the pair of vertical molds of the above-mentioned upper mold member On the upper part, the second supporting part for holding the sheet is provided on the other side of the pair of vertical molds of the upper mold member. The lower part of this room has: the third sheet for the airbag is placed above the first support portion and the second support portion, and the second sheet for the hanging portion is placed on the vertical mold of the lower mold member Above, the step of clamping and joining the third sheet and the second sheet between the vertical mold of the upper mold member and the vertical mold of the lower mold member; The step of lowering the second support part between the mold pairs, and hanging down the part of the third sheet between the first support part, and pulling up the second sheet; and the first step for the airbag The sheet is placed above the vertical mold of the lower mold member, and the first sheet and the third sheet are sandwiched between the vertical mold of the upper mold member and the vertical mold of the lower mold member And proceed to the step of joining.

Another method of manufacturing an airbag unit according to the present invention is characterized by using a pair of vertical molds that are separated and erected between the width of the airbag and a pair of adjacent vertical molds with a predetermined interval between them. A manufacturing device for the pair of lower mold members and the upper mold members respectively facing the vertical molds of the above-mentioned vertical molds, and the first support portion for holding the sheet is provided in the inside of the above-mentioned pair of vertical molds of the above-mentioned upper mold member On the upper part of the upper part, the second supporting part for holding the sheet is provided at the lower part of the pair of the vertical molds of the upper mold member, and has: The third sheet for the airbag is erected above the first support portion and the second support portion, the first sheet for the airbag is erected above the vertical mold of the lower mold member, and the first sheet for the hanging portion 2 The sheet is placed above the vertical mold of the lower mold member between the first sheet and the third sheet, between the vertical mold of the upper mold member and the vertical mold of the lower mold member The step of clamping the first sheet, the second sheet, and the third sheet to join them.

According to the present invention, since the airbag unit formed by a plurality of airbags is constructed by linearly joining a plurality of tubular bags constituting the airbag, and since the airbags are connected to each other to be joined, these airbags are used in combination When the air cushion is used, it is easy to arrange the airbags in a row. In addition, since the inside of the airbag of the present invention is divided up and down by the hanging part, the height can be formed higher relative to the width, which can increase the sinking amount of the human body when lying on the side, and improve the comfort.

In addition, according to the manufacturing method of the present invention, the airbag unit of the present invention can be manufactured with fewer welding steps than before.

1‧‧‧Airbag

1a‧‧‧Upper side

1b‧‧‧Lower side

1c, 1d‧‧‧end

2‧‧‧Ears

3‧‧‧Bottom sheet

4‧‧‧Upper sheet

5‧‧‧Hanging part

6‧‧‧Welding part

7‧‧‧Press button

8, 18a, 18b, 18c‧‧‧tube

8a, 8b, 8c‧‧‧Branch

9, 9a, 9b, 9c, 9d, 9e, 9f‧‧‧Supply and exhaust ports

10‧‧‧Airbag unit

11‧‧‧The first sheet

12‧‧‧Second sheet

13‧‧‧The third sheet

20、23‧‧‧Lower mold

20a, 21a, 23a‧‧‧Motion mold

21‧‧‧Upper mold

22a, 22b, 24a, 24b, 24c‧‧‧Support

Fig. 1 is a diagram showing an airbag unit according to an embodiment of the present invention.

Fig. 2 is also a diagram showing the manufacturing method thereof.

Figure 3 shows the shape of the airbag unit according to the embodiment of the present invention Upper side perspective view.

Fig. 4 is an upper perspective view showing the shape of the airbag unit according to the embodiment of the present invention.

Fig. 5 is a bottom perspective view showing the shape of the airbag unit according to the embodiment of the present invention.

Fig. 6 is a perspective view showing the shape of the portion of the lower side 1b of the airbag unit according to the embodiment of the present invention.

Fig. 7 is a diagram showing the manufacturing steps of the embodiment of the present invention.

Fig. 8 is a diagram showing an airbag unit manufactured by the manufacturing steps of the embodiment of the present invention.

Fig. 9 is a diagram showing a method of manufacturing the airbag unit according to the embodiment of the present invention.

Fig. 10 is a diagram showing another method of manufacturing the airbag unit according to the embodiment of the present invention.

Fig. 11 is a diagram showing the manufacturing steps of the airbag unit shown in Fig. 10.

Fig. 12 is a diagram showing another method of manufacturing the airbag unit according to the embodiment of the present invention.

Fig. 13 is a diagram showing the manufacturing steps of the airbag unit shown in Fig. 12.

Fig. 14 is a diagram showing another method of manufacturing the airbag unit according to the embodiment of the present invention.

Fig. 15 is a diagram showing another method of manufacturing the airbag unit according to the embodiment of the present invention.

Fig. 16 is a diagram showing the connecting portion of the airbag.

Fig. 17 is a diagram showing the shape of the connecting portion.

Fig. 18 is a diagram showing the shape of a conventional airbag.

Hereinafter, the embodiments of the present invention will be specifically described with reference to the attached drawings. Fig. 1 is a perspective view showing an airbag unit 10 according to an embodiment of the present invention, Fig. 2 is a view showing a manufacturing method thereof, Fig. 3 is a perspective view showing an upper side 1a of the airbag 1 of the airbag unit 10, and Fig. 4 Similarly, a perspective view of the upper side 1a of the airbag 1 is shown. FIG. 5 is a perspective view of the lower side 1b of the airbag 1 of the airbag unit 10, and FIG. 6 is a perspective view of the lower side 1b of the airbag 1 of the airbag unit 10. As shown in FIG. 1, as an example, the airbag unit 10 is composed of three airbags 1. Each airbag 1 has a cross-sectional shape close to a vertically long rectangle, and forms a rod-shaped bag-shaped air chamber parallel to each other. Figure 1(a) is a view looking down on the airbag unit 10 diagonally, Figure 1(b) is a view looking down on the airbag unit 10 diagonally, and Figure 1(c) is a view showing the length of the airbag 1 of the airbag unit 10 Fig. 3 is a diagram showing the other end surface 1d in the longitudinal direction of the airbag 1, and Fig. 4 is a diagram showing the upper side surface 1a of the airbag 1. The ears 2 are formed on both end surfaces 1c and 1d of the airbag 1. The airbag unit 10 including the ears 2 is manufactured in the following manner. As shown in Figure 2, the airbag unit 10 is formed by forming the lower sheet 3 for airbags into three shallower bends, and forming the upper sheet 4 for airbags into three deeper bends. Part, the folded part of the lower sheet 3 and the folded part of the upper sheet 4 are welded to form the welded part 6. At the deeper curved part of the upper sheet 4, the hanging part 5 is erected and welded inside the curved part The surface is divided into upper and lower parts. Therefore, the cross-sectional structure of the airbag unit 10 is as shown in Fig. 2(b). Basically, the airbags 1 having a plurality of air chambers separated vertically are welded portions 6 on the side surfaces of the air chambers below each other. To link. Furthermore, after the sheets 3 and 4 are joined into a cylindrical shape by the welding portion 6, both ends of the cylindrical length direction are flattened and overlapped in the horizontal direction, and the overlapped portion is welded to form the ear portion 2. The press buckle 7 is provided on the ear 2 of one end surface 1c of the airbag 1 in the longitudinal direction of the tube. By engaging the press buckle 7 with the press buckle provided on the belt, the ear 2 of each airbag 1 can be secured by the belt. link.

Fig. 3 shows the other end surface 1d of the airbag 1 in the tube longitudinal direction. The supply and exhaust ports 9d, 9e, and 9f are respectively provided in the upper half of each end surface 1d of the airbag 1, and the supply and exhaust ports 9d, 9e, 9f are slightly offset from each other in the vertical direction and are arranged on the end surface 1d. Furthermore, the branching parts 8a, 8b, 8c of the pipe 8 for supply and exhaust to the airbag 1 are airtightly connected to these supply and exhaust ports 9d, 9e, 9f, and the branching parts 8a, 8b, 8c are passed through the supply and exhaust ports 9d, 9e, and 9f. The air ports 9d, 9e, and 9f communicate with the upper air chambers separated by the hanging portion 5 of the airbag 1, respectively. Thereby, the air chambers above the three airbags 1 connected to the tube 8 via the branching portions 8a, 8b, and 8c are independently controlled for supply and exhaust. Thereby, the three airbags 1 of each airbag unit 10 are individually controlled for supply and exhaust. All airbag units 10 are connected to the airbag 1 connected to the branch 8a, the airbag 1 connected to the branch 8b, and the airbag 1 connected to the branch 8b. The airbag 1 of 8c is controlled by the same cycle and pressure. Therefore, when the air chamber above the airbag 1 is viewed as a whole of the air cushion, the air supply and exhaust control is the same every two. However, the present invention is not limited to Therefore, it is also possible to connect the air chambers above the three airbags 1 of each airbag unit 10 with a single tube 8. In each airbag unit 10, the air chambers above the airbag 1 may be shared with the same Cycle and pressure control for supply and exhaust. In this way, the air chamber above the airbag 1 of the airbag unit 10 receives independent air supply and exhaust control for each airbag unit 10 arranged in the longitudinal direction of the air cushion. In addition, all the airbag units 10 may be connected by a single tube, and all the airbags 1 may be controlled to supply and exhaust with the same cycle and pressure.

On the other hand, as shown in FIGS. 5 and 6, the air supply and exhaust ports 9 (9a, 9b, 9c) for supplying and exhausting air to the lower air chamber separated by the hanging portion 5 of the airbag 1 ) Are respectively provided on the lower side 1b of each airbag 1, and the supply and exhaust pipes 18a, 18b, 18c are individually connected to these supply and exhaust ports 9a, 9b, 9c. Thereby, the air pressure of the lower air chamber separated by the hanging portion 5 of the airbag 1 can be individually controlled via the supply and exhaust pipes 18a, 18b, and 18c. That is, the three tubes 18a, 18b, and 18c forming a bundle are respectively connected to the supply and exhaust ports 9a, 9b, and 9c. The chambers are individually controlled by supply and exhaust with independent cycles and pressures. In addition, each airbag unit 10 is equipped with three airbags 1, and the three tubes 18a, 18b, and 18c that are individually controlled are also individually controlled to supply and exhaust air chambers below the airbag 1 in other airbag units 10. Thereby, the plural airbags 1 of the plural airbag units 10 juxtaposed in the longitudinal direction of the air cushion are subjected to the same air supply and exhaust control every two of the entire air cushion. In addition, the air supply and exhaust ports 9a, 9b, and 9c on the lower side 1b of the airbag 1 are opposite to each other in the longitudinal direction of the airbag 1. This number of biased configurations. This is to keep the three tubes as straight as possible and arrange them along the lower side 1b of the airbag 1. In addition, the three air supply and exhaust ports 9a, 9b, and 9c provided on the underside 1b of the airbag 1 may be connected to each airbag unit 10 by a common air supply and exhaust pipe for air supply and exhaust. control. In this case, each airbag unit 10 shares the air chamber below the airbag 1 and performs supply and exhaust control at the same cycle and pressure. Thereby, the air chamber below the airbag 1 receives independent air supply and exhaust control for each airbag unit 10 arranged in the longitudinal direction of the air cushion. In addition, all the airbag units 10 may be connected by a single tube, and all the airbags 1 may be controlled to supply and exhaust with the same cycle and pressure. In addition, when the three supply and exhaust ports 9a, 9b, and 9c are connected by a single pipe, the positions of the supply and exhaust ports 9a, 9b, and 9c do not have to be offset in the longitudinal direction of the airbag 1. Set up as a column. In addition, in order to control the pressure of the air chamber below each airbag 1, the embodiments shown in Figs. 5 and 6 have the air supply and exhaust ports 9a, 9b, and 9c provided on the lower side 1b of the airbag 1, but it is not limited to this. For example, in the same way as the pressure control of the upper air chamber shown in FIG. 3, the supply and exhaust ports 9a, 9b, and 9c may be provided on one side surface 1c of the airbag 1.

In addition, by providing holes in the hanging portion 5, the upper air chambers of each airbag 1 and the lower air chambers can be connected, and the upper air chambers and the lower air chambers of each airbag 1 can be controlled in the same mode. . In this case, any one of the supply and exhaust ports 9a, 9b, and 9c and the supply and exhaust ports 9d, 9e, and 9f may be provided.

Next, proceed to the operation of this embodiment as described above Line description. The airbag unit 10 shown in Figure 1(a) is arranged in a plurality in the direction perpendicular to the longitudinal direction of the airbag 1, and the entire airbag 1 is configured in a direction perpendicular to the longitudinal direction (the longitudinal direction of the air cushion). ) Juxtaposed air cushion. At this time, the press buckles 7 of the adjacent airbags 1 of the adjacent airbag units 10 are engaged to connect the adjacent airbag units 10 to each other. Or, by engaging the press buckles provided on the belt with the press buckles 7 provided on the ears 2 of all the airbags 1, the ears 2 of all the airbags 1 may be connected by the belt. In addition, as shown in Fig. 3, on the end surface 1d of the airbag 1, a pipe 8 is installed through the supply and exhaust ports 9d, 9e, and 9f so as to communicate with the upper air that is divided by the hanging portion 5 of the airbag 1. In the chamber, the air chambers above the three airbags 1 of the airbag units 10 are independently controlled for supply and exhaust by the pipe 8 and the branching portions 8a, 8b, and 8c. In addition, as shown in Figures 5 and 6, since each airbag 1 is provided with one supply and exhaust port 9a, 9b, 9c on the lower side 1b of the airbag 1, the other The supply and exhaust pipes 18a, 18b, and 18c are connected to these supply and exhaust ports 9. In this way, the air chambers below the airbag 1 are independently controlled for supply and exhaust for each airbag 1. A pump for supply and exhaust is connected to these pipes for supply and exhaust, and the pressure of the upper and lower air chambers in each airbag 1 of each airbag unit 10 is controlled. The air chambers above and below each airbag 1 are within each airbag unit 10. Each airbag 1 and each air chamber receive individual pressure control. All airbags 1 located on the head side of the cushion of each airbag unit 10 are for all airbags. The airbag unit 10 on the foot side receives the same pressure control, all the airbags 1 on the foot side receive the same pressure control for all the airbag units 10, and all the airbags 1 in the middle are for all the airbag units. 10 Accept the same pressure control. In addition, the aspect of pressure control is just one example, and the aspect of pressure control of each airbag 1 is different depending on the purpose of the pressure control of the air cushion.

In this embodiment, in each airbag unit 10, all the airbags 1 belonging to this item are connected by the welded portion 6, so even if it is not like the prior art described in Patent Document 3, independent individual airbags are installed Because the straps of the cover are arranged in a row, the airbag will not be tangled. Therefore, there is no need for a belt for airbag deployment, and no need for the operation of arranging the airbags in a row by the belt.

In addition, in this embodiment, since the airbags 1 are not only connected by the welded portion 6, but also connected to each other via the press buckle 7 provided on the ear portion 2 and via a belt having press buckles engaged with these press buckles 7, so Since the airbags 1 can be restrained to each other more surely, the airbags 1 can be prevented from falling over, and the airbag 1 can surely maintain the shape of the air cushion.

In addition, since the airbag of this embodiment has a horizontal cross section of the airbag, the hanging portion 5 that connects the inner surface of the airbag horizontally is provided at the approximate center of the vertical direction. Therefore, the hanging portion connects both the upper air chamber and the lower air chamber. Each pressure-separated air chamber is provided in the airbag, and the air pressure can be controlled by different modes, and the control mode of the airbag can be set in a wide range.

In addition, since the hanging part is provided at the approximate center of the airbag in the vertical direction, the height can be increased more sufficiently than the width of the cross section of the airbag, the amount of sinking of the human body when lying down can be increased, and the comfort can be improved. Significant improvement.

Next, a method of manufacturing an airbag unit according to an embodiment of the present invention will be described. In the lower mold 20 used in this embodiment, a plurality of vertically rising wall-shaped operating molds 20 a are formed, and the upper mold 21 is formed with a plurality of vertically rising wall-shaped operating molds 21 a. These actuating mold 20a and actuating mold 21a are formed in positions integrated with each other, and upper mold 21 and lower mold 20 are arranged such that actuating mold 20a and actuating mold 21a face each other. The distance between the actuating molds 20a and 21a is between the outermost and inner sides, and between the two actuating molds 20a and 21a in the center (wide interval) based on the width of the airbag 1. The pair of actuating molds on both sides It is separated from the center of the actuating mold pair (narrow interval) by a few intervals. In addition, the liftable support portion 22a for fixing and positioning the end of the sheet is provided on the outer side of the outermost operating mold 20a, and the support portion 22b for placing the sheet to be raised and lowered is provided at narrow intervals. Between actuation mold 20a.

In this embodiment, first, as shown in FIG. 7(a), the first sheet 11 for the airbag is placed above the lower mold 20. At this time, both end portions of the first sheet 11 are fixed to the support portion 22a, the support portion 22b is located at the lower position, and the first sheet 11 is in a state where it hangs between the movable molds 20a. After that, as shown in Figure 7(b), the three-piece second sheet 12 for the hanging part is placed on the upper end surface of the widely spaced operating mold 20a, and only the second sheet 12 is placed on On the widely spaced actuating mold 20a. Next, the upper mold 21 is lowered, and the first sheet 11 and the second sheet 12 are sandwiched between the operating molds 20a and 21a of the upper mold 21 and the lower mold 20, and heat and stress are applied to the first sheet. Material 11 and the second sheet 12, The first sheet 11 and the second sheet 12 are welded together.

Next, the upper mold 21 is raised, as shown in FIG. 7(c), the support portion 22a is raised, and the third sheet 13 for the airbag is placed horizontally above the entire lower mold 20. Next, the upper mold 21 is lowered, the first sheet 11 and the third sheet 13 are sandwiched between the active mold 21a and the active mold 20a, and heat and stress are applied to the first sheet 11 and the third sheet. 13. The first sheet 11 and the third sheet 13 are welded together.

As a result, as shown in Figure 8(a), the first sheet 11 is suspended below, the upper edge of which is supported by the third sheet 13, and the second sheet 12 is welded to the first sheet 11. The middle structure of the part. If the structure obtained by the above method is turned upside down, as shown in Figure 2, the upper sheet 4 obtained at the upper part has a substantially elliptical cross-sectional shape, and the hanging part 5 is welded in the middle, and the upper sheet 4 The lower opening is below the airbag 1 closed by the sheet 3, and the airbag unit 10 in which the airbags 1 are connected by the welded portion 6 is obtained. Moreover, if both ends of the cylindrical portion formed by the first sheet 11 and the third sheet 13 are overlapped in the horizontal direction and welded to each other, as shown in Figure 8(b), the ears 2 It is formed at both ends of the airbag 1.

According to the manufacturing method of this embodiment, when the airbag unit 10 is composed of three airbags 1 as shown in Fig. 8, the welding step of the hanging portion (the second sheet 12) is one time, and the third sheet 13 on the bottom The welding step of is one time, the welding steps of the both ends of each cylindrical body are six times, and the total number of welding steps is eight times in total. In this regard, the previous patent document 3 In the case of the airbag described, as shown in Figure 18, in order to manufacture a single airbag, a total of eight steps are required: the welding step of the hanger part (1); the welding step of the bottom edge (2); the cylinder The welding steps (3) and (4) of the two ends of the body; install the airbags to the fixing presses provided on the inner surface of the air mattress cover, and install the upper ends of the airbags and The welding steps (5), (6), (7), (8) of both ends of the lower part. In addition, a total of 24 steps are required to manufacture three airbags. Therefore, according to the present invention, in order to manufacture one airbag unit or three airbag structures, only eight welding steps are sufficient, which can be shortened to 1/3 of the conventional steps.

Fig. 9 is a diagram schematically showing the manufacturing method of Figs. 7 and 8 described above. The airbag unit shown in Fig. 10(c) can be manufactured in the same manner as this manufacturing method. The airbag unit is configured such that the first sheet 11a is relatively shallowly bent, and the third sheet 13a is relatively deeply bent, so that the deeper bent portion of the third sheet 13a is short-circuited, and the second sheet 12a of the hanging portion is welded to the first The part of the inner surface of the three sheets 13a is welded so that 11a of the first sheet and the third sheet 13a are in a bag shape. Therefore, in this airbag unit, the air chamber below the airbag is connected by the welded portion 6a.

Fig. 11 is a diagram showing the manufacturing process of the airbag unit. In the lower mold 23 used in this embodiment, a plurality of protruding operating molds 23a are formed, and the upper mold 21 is formed with a plurality of vertically rising wall-shaped operating molds 21a, as in FIG. These actuating mold 23a and actuating mold 21a are formed in positions that are integrated with each other, and the upper mold 21 and the lower mold 23 are arranged such that the actuating mold 23a and the actuating mold 21a are opposite to each other. Opposite. The distance between the actuating molds 23a and 21a is between the outermost and inner sides, and between the two actuating molds 23a and 21a in the center (wide interval), which is determined based on the width of the airbag 1. The pair of actuating molds on both sides It is separated from the center of the actuating mold pair (narrow interval) by a few intervals. In addition, support portions 24a that can be raised and lowered to fix and position the ends of the sheet are provided on the outer side of the outermost operating mold 21a, and support portions 24b and 24c that support the sheet are provided at wide intervals. Between the operating dies 21a and the narrowly spaced operating dies 21a. The support portion 24c is capable of raising and lowering.

In this embodiment, first, as shown in FIG. 11(a), the second sheet 12a for the hanging part is placed above the operating mold 23a of the lower mold 23. In addition, the third sheet 13a for the airbag is spanned on the support portions 24b and 24c. Furthermore, by pushing the operating mold 21a of the upper mold 21 against the operating mold 23a of the lower mold 23, heat and stress are applied to the second sheet 12a and the third sheet 13a, and the second sheet 12a and the second sheet 12a The three sheets 13a are welded together. Next, as shown in FIG. 11(b), the support portions 24a and 24c are lowered, and the second sheet 12a is pulled up. At this time, the third sheet 13a between the widely spaced operating molds 21a is hung between the support portions 24b. After that, the first sheet 11a is placed on the movable mold 23a of the lower mold 23, the movable mold 21a is lowered, and the first sheet 11a and the third sheet 13a are sandwiched by the movable mold 21a and the movable mold 23a, and heat is applied. And stress to weld it together. Thereby, as shown in Fig. 10, an airbag unit in which the welded portion 6a between the airbags is located in the air chamber below the lower portion of the airbag is manufactured.

Figures 12 and 13 also show the implementation of the present invention A diagram of another method of manufacturing the airbag unit 10 according to the embodiment. In this method, the first sheet 11b and the third sheet 13b are bent into a semi-ellipse, and the tip of each ellipse is shared with the second sheet 12b for welding. Figure 12 is for forming the ears 2, the cylindrical bodies of the first sheet 11b and the third sheet 13b formed as described above are welded by pressing the two ends of the cylindrical body vertically overlapping and pressing in the horizontal direction, and The ears 2 extending in the longitudinal direction are formed. The airbag unit can be manufactured as shown in Fig. 13. In the manufacturing method of this embodiment, as shown in FIG. 13, the upper mold 21 and the lower mold 20 similar to those in FIG. 7 are used. However, in this embodiment, one support portion 24b is provided at the upper part between the widely spaced operating dies 21a, and one support portion 24c is provided at the lower part between the narrowly spaced operating dies 21a. Furthermore, the support portion 24a is provided on the outer side of the outermost operating mold 21a.

In this embodiment, the third sheet 13b is placed on the support portions 24a, 24b, and 24c inside the upper mold 21, and the first sheet 11b is placed on the active mold 20a and the support portions 22a, 22b of the lower mold 20 on. At this time, the first sheet 11b is hung between the wide operating dies 20a and between the narrow operating dies 20a. Then, the second sheet 12b is horizontally arranged between the first sheet 11b and the third sheet 13b, and the second sheet 12b is supported by the operating mold 20a. In this state, the operating mold 21a is lowered toward the operating mold 20a, and between the operating mold 21a and the operating mold 20a, the first sheet material 11b, the third sheet material 13b, and the second sheet material 12b are sandwiched between the operating mold 21a and the operating mold 20a. Heat and stress to make it welded. Thereby, the hanging part is provided in the center of the up-down direction of the airbag, and the airbag unit which connects the adjacent airbag in the center of the up-down direction can be manufactured. In addition, although with the figure 13 The manufacturing device can manufacture an airbag unit including three airbags at the same time. However, it is not limited to this. The airbags adjacent to the first sheet 11b, the second sheet 12b, and the third sheet 13b may be separated from the adjacent airbags. After separating and welding the three airbags, they are welded to each other at appropriate positions to connect them.

Fig. 14 is also a diagram showing another manufacturing method according to the embodiment of the present invention. In the airbag unit of the present embodiment, the hanging portion is also provided at the center of the vertical airbag in the vertical direction, and adjacent airbags are connected to each other at the center of the vertical airbag. However, the airbag unit of this embodiment is to form the ears 2a. The cylindrical bodies of the first sheet 11c and the third sheet 13c formed as described above are horizontally overlapped and pressed in the vertical direction. Then, the welding is performed, and the ears 2a extending in the lateral direction are formed. The airbag unit of this embodiment can also be manufactured by the manufacturing apparatus shown in FIG. 13.

Fig. 15 is also a diagram showing another method of manufacturing the airbag unit 10 according to the embodiment of the present invention. This method is performed in the same manner as in Fig. 14. After the three cylindrical bodies formed by the first sheet 11c and the third sheet 13c are manufactured, these two ends are overlapped horizontally and pressed in the vertical direction for welding. , In the longitudinal direction of the cylindrical body, the two parts are similarly pushed in the vertical direction and the overlapping parts are welded, and the air chamber is divided into three in the longitudinal direction, which is formed to be connected in the longitudinal direction of the airbag Three airbags.

Fig. 16 shows the ear 2 extending in the vertical direction as shown in Fig. 8(b), which is cut and shaped as shown in Fig. 17 The connecting portions 30a, 30b are formed. The connecting portion 30a is formed on the upper portion of the end surface 1c of the end portion in the longitudinal direction of the airbag 1, and the connecting portion 30b is formed in the middle portion of the end surface 1c. The connecting portions 30a, 30b are formed in a belt shape, and the locking portions 31, 32 are formed at the front ends thereof. These locking portions 31 and 32 are engaged by overlapping each other, and connect the adjacent end surfaces 1c of the airbag 1 in the longitudinal direction. Therefore, when the connecting portions 30a, 30b are provided, the press buckle 7 shown in Fig. 5 and the like may not be provided, and the belt connecting the press buckle 7 may not be provided, and the airbag 1 may be used at a location other than the welded portion 6. In connection, the plurality of airbags 1 are restrained from each other by the welding portion 6 and the connecting portions 30a and 30b.

In addition, although in the above embodiment, the airbag unit is made up of three airbags, it is not limited to three. Two or more airbags may be used to form one airbag unit, and it may also be used as an air cushion. All required airbags are constructed as one airbag unit. The number of airbags constituting the airbag unit is mainly determined based on the control mode of air pressure control such as interactive expansion and contraction.

[Industrial Utilization Possibility]

According to the present invention, the manufacture is easy, the handling of each airbag and the airbag unit is easy, and the comfort as an air cushion is excellent, so that it makes a significant contribution to the popularization of the air cushion.

1‧‧‧Airbag

1a‧‧‧Upper side

1b‧‧‧Lower side

1c‧‧‧End

2‧‧‧Ears

6‧‧‧Welding part

7‧‧‧Press button

9a, 9b, 9c‧‧‧Supply and exhaust ports

10‧‧‧Airbag unit

Claims (11)

An airbag unit, characterized in that: an airbag is formed by a plurality of cylindrical bags formed by linearly joining two or more sheets at plural positions; a single hanging part is joined to one of the aforementioned The sheet material separates the inside of the cylindrical bag of each of the airbags into upper and lower air chambers; and the closed end part closes the both ends of the airbag in the longitudinal direction of the tube, and is placed inside the cylindrical bag The air chamber above the hanging part and the air chamber below the hanging part are connected up and down only by the hanging part. An airbag unit, which is characterized in that it has: an airbag, which is formed by sandwiching one piece of hanging part sheet material in the middle and linearly joining the two pieces of sheet material at multiple locations to form a plurality of cylindrical bags; And the closed end part is to close the both ends of the cylindrical bag in the tube length direction. The inside of the cylindrical bag is separated into upper and lower air chambers by the hanging part. The air above the hanging part The chamber is connected with the air chamber under the hanging part only by the hanging part up and down, the closed end part overlaps and joins the ends of the cylindrical bag lengthwise, and the overlapping part is formed on the front end of the belt. The shape of the locking part, the card The stop part is used to engage the locking parts of adjacent airbags to connect the adjacent airbags. For example, the airbag unit of claim 1 or 2, wherein the aforementioned cylindrical bag is joined at a plurality of locations and divided into a plurality of airbags in the longitudinal direction of the tube, and the plurality of airbags are formed in the longitudinal direction of the tube. As for the airbag unit of claim 1, wherein the closed end part is formed by overlapping and joining the ends of the cylindrical bag lengthwise, and the overlapping part is formed in a shape having a locking part at the front end of the belt. The locking portion is used to engage the locking portions of adjacent airbags to connect the adjacent airbags. Such as the airbag unit of claim 3, wherein the closed end portion is the end portion of the cylindrical bag being overlapped and joined lengthwise, and the overlapping portion is formed in a shape having a locking portion at the front end portion of the belt. The locking portion is used to engage the locking portions of adjacent airbags to connect the adjacent airbags. For example, the airbag unit of item 1 or item 2 of the scope of patent application is composed of three airbags connected in the length direction of the aforementioned airbag. An air cushion, which is characterized in that it is formed by the airbag unit of items 1, 2, 3, 4, 5, or 6 in the scope of the aforementioned patent application. An air cushion is characterized in that the airbag units of items 1, 2, 3, 4, 5 or 6 in the scope of the aforementioned patent application are juxtaposed in a direction perpendicular to the tube length direction of the airbag. A method of manufacturing an airbag unit, characterized in that a plurality of pairs of lower mold members are arranged with a predetermined interval between a pair of vertical molds separated and erected between the width of the airbag and a pair of adjacent vertical molds. And a manufacturing apparatus in which upper mold members respectively opposed to the vertical molds of the vertical molds are arranged, including a state in which the first sheet material for the airbag is suspended between the vertical molds and between the adjacent pairs of vertical molds The lower part is placed on the upper part of the lower mold member, and a plurality of second sheets for the hanging part are placed on the first sheet on the vertical mold so as to be erected between the vertical molds of the vertical mold pair. Above the material, the step of clamping and joining the first sheet and the second sheet between the vertical mold of the upper mold member and the vertical mold of the lower mold member; and the step of joining the lower mold member The first sheet between the pair of vertical molds is lowered so that the first sheet between the pair of adjacent vertical molds is positioned on the uppermost side, and the third sheet for the airbag is placed on the lower mold Above the member, a step of clamping and joining the first sheet and the third sheet between the vertical mold of the upper mold member and the vertical mold of the lower mold member. A method of manufacturing an airbag unit, characterized in that a plurality of pairs of lower mold members are arranged with a predetermined interval between a pair of vertical molds separated and erected between the width of the airbag and a pair of adjacent vertical molds. And a manufacturing apparatus equipped with upper mold members facing each of the vertical molds of the above-mentioned vertical molds, and the first support portion for holding the sheet is provided at In the upper part of the inner part of the pair of vertical molds of the upper mold member, a second support portion for holding a sheet is provided at the lower part of the pair of vertical molds of the upper mold member, and has: a third piece for the airbag The material is erected above the first support portion and the second support portion, and the second sheet for the hanging portion is placed above the vertical mold of the lower mold member, and the vertical mold of the upper mold member and the The step of clamping and joining the third sheet and the second sheet between the vertical molds of the lower mold member; lowering the second support portions of the pair of the vertical molds of the upper mold member, and The step of hanging down the portion of the third sheet between the first supporting parts and pulling up the second sheet; and placing the first sheet for the airbag on the vertical mold of the lower mold member Above, the step of clamping and joining the first sheet and the third sheet between the vertical mold of the upper mold member and the vertical mold of the lower mold member. A method of manufacturing an airbag unit, characterized in that a plurality of pairs of lower mold members are arranged with a predetermined interval between a pair of vertical molds separated and erected between the width of the airbag and a pair of adjacent vertical molds. And a manufacturing apparatus equipped with upper mold members facing the vertical molds of the vertical molds, and the first support portion for holding the sheet is provided on the upper part of the interior of the pair of vertical molds of the upper mold member, and the sheet The second support portion for holding is provided at the lower part of the pair of vertical molds of the upper mold member, It has: the third sheet for the airbag is installed above the first support portion and the second support, the first sheet for the airbag is installed above the vertical mold of the lower mold member, and the hanging portion is used The second sheet is placed above the vertical mold of the lower mold member between the first sheet and the third sheet, on the vertical mold of the upper mold member and the vertical mold of the lower mold member The step of bonding the first sheet, the second sheet, and the third sheet between the molds.

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