TW201813557A - Fluid cell, a pad device, and method of manufacturing fluid cell which can suppress man-hours and is easy to manufacture - Google Patents

Abstract

This invention provides a fluid cell which can decrease working hours and is easy to manufacture. The fluid cell (15) has a flexible tube (15a) capable of being filled with a fluid therein; and sealing parts (15b) forming adhesion mutually to the inner peripheral surfaces of the flexible tube (15a) to respectively seal the openings at two ends of the flexible tube (15a) in the state that the flexible tube (15a) is sandwiched toward a radial direction. At the end parts in the axial direction of the flexible tube (15a), concave folded parts (16) folded inwardly toward a direction intersected with the direction that the flexible tube (15a) is sandwiched are formed at the sealing parts (15b) in the radial direction of the flexible tube (15a). The sealing parts (15b) are disposed at positions where the concave folded parts (16) are formed along the aforementioned axial direction.

Description

   Fluid bladder, cushion device and manufacturing method of fluid bladder   

The invention relates to a fluid bladder, a cushion device, and a method for manufacturing the fluid bladder.

Conventionally, there has been known a fluid bladder that includes a flexible tube that can be filled with a fluid therein, and that the inner peripheral surfaces of the flexible tube are fixed to each other (adhered) when the flexible tube is sandwiched in the radial direction. ), Closed portions that close the openings at both ends of the flexible tube individually. When a fluid bladder of this type has been filled in the flexible cylinder, a corner is generated at an end in the axial direction of the flexible cylinder. This corner portion is sharpened toward the outside of one of the directions “the direction in which the flexible tube is sandwiched” at the closed portion in the radial direction of the flexible tube.

In order to suppress the occurrence of the aforementioned corners, a fluid bladder such as disclosed in Patent Document 1 below is known. The fluid bladder is an ear portion that has a triangular shape in plan view, with "the end in the axial direction of the flexible tube having a bottom edge extending in the clamping direction and a top angle protruding outward in the axial direction". After the closed portion is formed, the occurrence of the corner portion is suppressed.

    [Prior technical literature]         [Patent Literature]    

[Patent Document 1]: Japanese Patent Application Laid-Open No. 10-5289

However, in the aforementioned conventional fluid capsular bag, after the closed portion is formed, an operation of separately forming an ear portion is required, and the man-hour of the operation is greatly increased.

The present invention has been developed in view of the circumstances described above, and an object thereof is to provide a fluid bladder which can be easily manufactured while suppressing man-hours.

In order to solve the aforementioned problems, the present invention proposes the following means.

(1) A fluid bladder comprising: a flexible tube capable of being filled with fluid; and a pair of closed portions which are fixed to each other on an inner peripheral surface of the flexible tube in a state where the flexible tube is sandwiched in a radial direction. The two ends of the flexible tube are individually closed, and the ends of the flexible tube in the axial direction are formed in the radial direction of the flexible tube. The concave folded portion folded inward in one direction of the “direction in which the flexible tube is sandwiched”, and the closed portion is disposed at a position where the concave folded portion is formed along the axial direction.

In the present invention, the closed portion is disposed at a position where a concave folded portion is formed along the axial direction. Therefore, when the flexible tube is filled with a fluid to expand it, the end portion in the axial direction of the flexible tube expands in the aforementioned sandwiching direction, and the inner surfaces of the concave folded portions are separated from each other. With this, it is possible to suppress the occurrence of "a corner portion which becomes sharper toward the outside in the aforementioned one direction" at the end portion in the axial direction of the flexible tube. In addition, in addition to forming the recessed portion, as long as the position of the closed portion is adjusted, the aforementioned corner portion can be prevented from being generated at the end portion in the axial direction of the flexible tube. Therefore, compared with the end portion in the radial direction of the closed portion, In addition, the structure of the ear portion having a triangular shape in plan view is separately formed, and the fluid bag can be easily manufactured while suppressing man-hours.

(2) The fluid pouch described in (1) above, in which a pair of inner surfaces of the concave folded portion facing each other are formed with fixing portions for fixing the inner surfaces to each other, and the closing portion and the fixing portion are also formed. Can be integrated.

In this case, when the flexible tube is filled with a fluid to expand it, the inner surfaces of the concave folded portions fixed by the fixed portions are restrained from each other. Accordingly, at the end portion in the axial direction of the flexible tube, the outer peripheral surface located around the fixed portion can be formed into a flat surface shape orthogonal to the one direction.

In addition, since the closing portion and the fixing portion can be integrated, the fluid bladder can be manufactured more easily.

(3) The fluid bladder according to (1) or (2) above, wherein the closed portion is disposed on an inner side facing the axial direction of the flexible tube than both end edges of the flexible tube, and is disposed on the flexible tube. The tube may be formed with an ear portion protruding from the closed portion toward the outer side in the axial direction.

In this case, since the ear portion is formed on the flexible tube, a mounting member for mounting the fluid bladder on the cushion device can be provided on the ear portion, for example.

(4) The fluid pouch of the above (3), wherein the closed portion extends along the one direction and is arranged along the one direction in the entire area of the flexible tube, and the ear portion may also be along the one Direction is formed over the entire area of the flexible tube.

In this case, the ear portion is arranged along the aforementioned one direction over the entire area of the flexible tube. Therefore, the area of the ear portion can be largely ensured, and for example, the number and shape of the mounting members to be attached to the ear portion can be selected freely.

(5) The fluid pouch described in (3) or (4) above, wherein the ear portion may be formed with a restriction portion connected to another fluid pouch to restrict relative displacement between the fluid pouches.

In this case, the restriction portion formed on the ear restricts the relative displacement between the plurality of fluid sacs, thereby improving the self-reliance of the fluid sacs.

(6) A fluid bag according to any one of (1) to (5) above, wherein the flexible tube is provided with a partition wall that divides the inner portion of the flexible tube into two filling chambers, and the partition wall, The inside of the flexible tube can also be distinguished in the aforementioned one direction.

In this case, the inside of the flexible tube is divided into two filling chambers in the aforementioned one direction in which the concave folded portion is folded. Accordingly, the flexible tube can be easily urged to stand on its own in one of the directions. Moreover, since the outer peripheral surface located around the fixed portion can be formed into a flat surface shape orthogonal to the aforementioned one direction, it is possible to make a user feeling good when lying on the fluid bag.

(7) The pad device of the present invention is characterized in that it is any one of the fluid pouches described in (1) to (6) above.

In this case, each of the aforementioned effects can be achieved in the mat device.

(8) The method for manufacturing a fluid bladder according to the present invention is the method for manufacturing a fluid bladder according to the above (2), characterized in that the fixed portion and the closed portion are formed simultaneously.

In this case, since the closed portion and the fixed portion are formed at the same time, it is possible to easily manufacture the fluid bladder while suppressing man-hours.

According to the present invention, it is possible to easily manufacture a fluid bladder while suppressing man-hours.

10‧‧‧ Mat device

15, 25, 35, 45‧‧‧ fluid pouches

15a‧‧‧ flexible tube

15b, 25b‧‧‧ closed

16‧‧‧ Concave fold

16c‧‧‧ inside

17‧‧‧ fixed section

18, 48‧‧‧ Ear

19, 29‧‧‧Mounting member (restricted part)

40‧‧‧ Link

49‧‧‧Restricted Department

FIG. 1 is a schematic perspective view of a mat device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the fluid bladder in the cushion device shown in FIG. 1.

Fig. 3 is a front view of an end portion in the axial direction of the fluid bladder shown in Fig. 2.

Fig. 4: (a) is a front view and (b) is a plan view during the process of filling the fluid bladder shown in Fig. 3 with air.

Fig. 5: In the manufacturing process of the fluid bladder shown in Fig. 2, (a) is a concave bending step, (b) is a closing step and a fixing step, and (c) is a step showing the installation of a mounting member. .

Fig. 6 shows a modification of the fluid bladder according to the first embodiment, wherein (a) is a first modification and (b) is a front view of a second modification.

Fig. 7 is a perspective view showing a third modification of the fluid bladder according to the first embodiment.

Fig. 8 is a perspective view showing a fluid bladder according to a second embodiment of the present invention.

FIG. 9 is a side view of the fluid bladder shown in FIG. 8.

    (First Embodiment)    

Hereinafter, a mat device 10 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 6.

The cushion device 10 includes a mattress device capable of lying on the user's side and a cushion device capable of sitting by the user. In this embodiment, a mattress device is used as an example of the cushion device 10. Hereinafter, the structure of each part is demonstrated using the front-back direction X, the left-right direction Y, and the up-down direction Z of the mat apparatus 10.

As shown in FIG. 1, the cushion device 10 includes a cushion portion 11 on which a user can lie down, an air supply / exhaust portion 12 that performs air supply and exhaust to the cushion portion 11, and a device that executes control of the air supply and exhaust portion 12. Controller 13

The cushion portion 11 includes a plurality of fluid sacs 15. The interior of the fluid sacs 15 is filled with air to support the load of a user lying on the cushion portion 11. The internal pressure of the fluid bladder 15 corresponds to the hardness of the cushion portion 11. By setting the internal pressure of the fluid bladder 15 according to the weight of the user, the hardness of the cushion portion 11 can be formed to be most suitable for the user. hardness.

The fluid pouch 15 is a rod-shaped pouch extending in the left-right direction Y in the cushion portion 11. In the example shown in the figure, the plurality of fluid pouches 15 are arranged by being arranged in the front-rear direction X.垫 部 11。 Mat section 11. The fluid bladder 15 is formed of, for example, a vinyl chloride film or a urethane film, and is formed into a circle around the central axis O1. Between the two peripheral ends, for example, by welding or the like Form a connection. A peripheral end line 15f extending in the left-right direction Y is formed in the welded portion of the thin film material. In the fluid bladder 15, a peripheral end line 15f is located at a lower end portion, and a portion of the film material above the peripheral end line 15f forms a flexible tube 15a described later.

The fluid bladders 15 disposed adjacent to each other may be fixed to each other or may not be fixed to each other. The fluid bladder 15 may be attached to "a cover (not shown in the drawing that integrally covers the plurality of fluid bladders 15)" by, for example, buttons and ropes as mounting members 19 described later.

As shown in FIG. 2, the fluid bladder 15 includes a flexible tube 15 a capable of being filled with a fluid therein, and the inner peripheral surfaces of the flexible tube 15 a are fixed to each other while the flexible tube 15 a is sandwiched in the radial direction. Each of the flexible tubes 15a is closed (closed) by closing portions 15b that are closed (adhesive). The central axis O1 of the flexible tube 15a extends in the left-right direction Y. One of the radial directions orthogonal to the central axis O1 in a plan view of the flexible tube 15a viewed from the left-right direction Y extends along the up-down direction Z. The flexible tube 15a is rectangular when viewed from the front-rear direction X and the left-right direction Y. The flexible tube 15a may be formed of a plurality of film materials.

A partition wall 15c extending in the left-right direction Y is formed in the flexible tube 15a. The partition wall 15c is formed near the central portion of the flexible tube 15a in the up-down direction Z. With the partition wall 15c, the inside of the fluid bladder 15 (the flexible tube 15a) is partitioned into two filling chambers in the vertical direction Z. Each filling chamber is provided with an air supply / exhaust port 15e for supplying and exhausting air individually. To each of the air supply / exhaust ports 15e, a pipe serving as the air supply / exhaust portion 12 is connected.

As shown in FIG. 4, an end portion of the flexible tube 15 a in the left-right direction Y is formed in the radial direction of the flexible tube 15 a, and the closed portion 15 b faces in the direction of “the flexible tube 15 a is sandwiched”. One of the directions, that is, the concave folded portion 16 folded inside the up-down direction Z. The concave folded portion 16 is folded toward one direction in the radial direction of the flexible tube 15a, and in the example shown in the figure, it is folded toward the lower side in the vertical direction Z. In a state where the air has been discharged from the fluid bladder 15 (flexible tube 15a), in a state where the fluid bladder 15 has been folded in the front-rear direction X, the concave folded portion 16 is formed throughout the left-right direction Y of the flexible tube 15a. full length. That is, as shown in FIG. 4, in the process of filling the fluid bladder 15 with air, the concave folded portion 16 is formed over the entire length of the flexible tube 15 a in the left-right direction Y. The concave folded portion 16 may be formed on the upper surface and the lower surface, respectively.

The closed portion 15b is disposed at a position where the concave folded portion 16 is formed in the left-right direction Y. That is, the closed portion 15b and the concave folded portion 16 overlap each other.

The closed portions 15 b are individually formed as a pair at both ends in the left-right direction Y of the fluid bladder 15. The closed portion 15b extends in the vertical direction Z and is disposed over the entire area of the flexible tube 15a. The closing portions 15b close to each other at the inner peripheral surfaces of the flexible tube 15a to close the openings of both ends of the flexible tube 15a. In the example shown in the figure, the closed portion 15b is formed by welding the inner peripheral surfaces of the flexible tube 15a to each other.

As shown in FIGS. 2 and 3, a pair of inner surfaces 16 c of the concave folded portions 16 facing each other is formed with a fixing portion 17 that fixes the inner surfaces 16 c to each other. The fixing portion 17 is formed integrally with the closing portion 15b. The fixed portion 17 and the closed portion 15b are formed by welding lines of the flexible tube 15a cut in the longitudinal direction in the vertical direction Z.

In a state where air has been filled in the fluid bladder 15, the concave folds 16 are individually formed at both ends in the left-right direction Y of the upper surface of the flexible tube 15a which faces upward.

The concave folded portion 16 includes a concave folded concave portion 16 a and an opposing portion 16 b. The concave folded portion 16 is recessed downward and opens upward. The concavely folded recessed portion 16 a is shown in a plan view: two tops are arranged along the front-rear direction X, and the remaining tops are arranged in a triangular shape outside the left-right direction Y. The facing portion 16b extends from the outer end portion in the left-right direction Y of the concave folded portion 16a toward the outside in the left-right direction Y. The facing portion 16 b is formed by the inner surfaces 16 c of the concave folded portion 16 facing each other in the front-rear direction X. A fixing portion 17 is formed at an inner end portion in the left-right direction Y of the facing portion 16b.

In addition, in this embodiment, the closed portion 15b is disposed inward of the flexible tube 15a in the axial direction of the both ends of the flexible tube 15a, and the flexible tube 15a is formed from the closed portion 15b to the left-right direction. Y ear 18 protruding from the outer side. The ear portions 18 are individually formed at both ends in the left-right direction Y of the flexible tube 15a. The ear portion 18, when viewed from the front-rear direction X, presents a long rectangle in the vertical direction Z.

At both ends of the ear portion 18 in the up-down direction Z, two mounting members (restriction portions) 19 are arranged at intervals in the up-down direction Z. In the example shown in the figure, the attachment member 19 is a snap button made of synthetic resin that is disposed in a hole formed in the ear portion 18. With this mounting member 19, the fluid bladder 15 is mounted on a cover not shown in the drawing of the cushion device 10. The attachment member 19 is connected to the other fluid bladder 15 through the cover, and functions as a restricting portion that restricts relative displacement between each other.

One or three or more mounting members 19 may be arranged, and may also be arranged at the central portion of the ear portion 18 in the upward and downward direction Z. Alternatively, a metal snap may be used as the mounting member 19.

Next, a method for manufacturing the fluid bladder 15 will be described with reference to FIG. 5.

First, the film material forming the fluid bladder 15 is formed into a circle around the central axis O1, and its two peripheral ends are welded to each other to form a connection, thereby forming a peripheral end line 15f. In this way, the flexible tube 15a is formed.

Next, in the concave folding step, as shown in FIG. 5 (a), the upper end portion of the outer peripheral surface of the flexible tube 15a extending in the left-right direction Y is folded toward the inner side in the up-down direction Z to form Concave folded portion 16. In the example shown in the figure, a concave folded portion 16 parallel to the central axis O1 is formed over the entire length of the flexible tube 15a. In the concave folding step, it is not necessary to form the concave folded portion 16 over the entire length of the flexible tube 15a, and it is sufficient that at least the end portion in the left-right direction Y of the flexible tube 15a can be folded inward in the vertical direction Z. The concave folded portion 16 may be inclined with respect to the central axis O1.

The maximum depth of the concave fold line 16d formed by the groove bottom of the concave fold portion 16 is preferably the front-back direction X of the upper portion of the fluid bladder 15 at the center of the left-right direction Y in the state of being filled with air. 15% to 50% of the thickness dimension (hereinafter referred to as the width of the pouch in the center).

When the maximum depth of the concave fold line 16d is 15% or less of the bag width in the center portion, it can be confirmed that a sharp corner portion slightly upwards is generated at the end portion in the left-right direction Y of the flexible tube 15a. In addition, when the maximum depth of the concave fold line 16d is 50% or more of the width of the pouch in the center, it can be confirmed that among the upper surfaces of the fluid pouch 15, the ends in the front-back direction X of the left-right direction Y The thickness dimension (hereinafter referred to as the width of the pouch at the end) is larger than the width of the pouch at the center.

Next, as shown in FIG. 5 (b), for example, the flexible tube 15a is sandwiched from both sides of the front-rear direction X by a welding means not shown in the drawing to form a weld at the open end of the flexible tube 15a. Thus, the inner peripheral surfaces of the flexible tubes 15a can be connected to each other in the entire region of the vertical direction Z. In this way, the fixing step of fixing the pair of inner surfaces 16c of the concave folded portion 16 facing each other and the closing step of closing the openings at both ends of the flexible tube 15a with the closing portion 15b can be performed simultaneously.

As shown in FIG. 5 (c), by this welding operation, closed portions 15b extending in the vertical direction Z are formed at both ends of the flexible tube 15a in the left-right direction Y, and the closed portions 15b are positioned at A portion higher than the concave fold line 16 d of the concave fold portion 16 forms a fixing portion 17. Moreover, the ear part 18 is formed individually in the part of the flexible tube 15a which is located on the outer side of the left-right direction Y rather than the closed part 15a. When the two peripheral ends of the film material are welded to form the peripheral end line 15f as described above, the welding operation may be performed at the same time, thereby forming the peripheral end line 15f, the closed portion 15b, and the fixing portion 17 at the same time. .

Then, the mounting members 19 are disposed at both end portions in the upper and lower direction Z of the ear portion 18. In the example shown in the figure, the mounting member 19 on the upper side is mounted on the facing portion 16 b of the concave folded portion 16.

When the fluid bladder 15 manufactured as described above is used as the cushion device 10, the plurality of fluid bladders 15 are attached to the cover of the cushion device 10 using the mounting member 19, and the air supply and exhaust unit 12 and The control unit 13 fills the inside of the fluid bladder 15 with air.

Here, in the state of being filled with air, the width of the pouch at the end portion is approximately twice the "depth to the concave fold line 16d of the concave fold portion 16." Thereby, the depth of the concave folded portion 16 can be set based on the width of the pouch at the end portion when the air is filled.

In addition, when a receiving member that can be mounted on the "mounting member 19 disposed on the ear portion 18 of the fluid bladder 15" is provided on the cover of the cushion device 10, the interval (pitch) in the front-rear direction X is preferably Equal to the width of the pouch at the end. In this way, the gap between the fluid bladders 15 in the front-back direction X can be reduced, and when the user's hand is placed between the plurality of fluid bladders 15, it is possible to prevent the hand from entering the gap formed between the fluid bladders 15.

As described above, the gap between the fluid bladders 15 can be effectively reduced by setting the depth of the concave folded portion 16 to a half of the aforementioned pitch.

Next, a modification of the fluid bladder 15 will be described.

As shown in FIG. 6 (a), in the fluid bladder 25 according to the first modification, the closed portion 25b is formed in a curved shape protruding toward the outside in the left-right direction Y as it goes toward the inside in the vertical direction Z. By forming such a closed portion 25b, it is possible to easily secure a portion where the mounting member 19 is disposed at both ends in the upper and lower direction Z of the ear portion 18. According to this structure, the mounting member 19 can be easily disposed in the fluid bladder 25 when the ear portion 18 is bent in the front-rear direction X as compared with the case where the closed portion 25b is formed in a straight line extending in the vertical direction Z. Near the center of the front-back direction X.

In addition, in other aspects of the closed portion, it may be formed: in a top view viewed from the front-rear direction X, the more it is directed upward, the more it is inclined toward the outside of the left-right direction Y; or in the aforementioned top view , The more it goes up, the more it goes towards the inclination line inside Y in the left-right direction.

Next, as shown in FIG. 6 (b), in the fluid bladder 35 according to the second modification, a flat fastener that extends in the vertical direction Z is provided as the attachment member 29 in the ear portion 18. The flat buckle is provided so that it may be located in substantially the whole area of the ear part 18 in the up-down direction Z. By using the flat fastener as the mounting member 29 as described above, the mounting and dismounting operation of the mounting member 19 can be made easier than the structure using a snap button. In addition, in a case where the flat fastener is disposed in a wide range of the ear portion 18, the mounting strength provided by the mounting member 29 can be increased.

In addition, as for other aspects of the mounting member, it may have the following structure: a fixing hole is provided in the ear portion 18, and a "fixing rope with a knot portion formed at each specific interval" is inserted through "the plural are arranged in front and rear Each fixing hole of the fluid bladder 15 in the direction X ".

Next, as shown in FIG. 7, in the fluid bladder 15A according to the third modification, the fixing portion 17 is not formed in the concave folded portion 16, and the inner surfaces 16 c of the concave folded portion 16 are not fixed to each other. . Therefore, in the concave folded portion 16, "the front and back pairs (a pair) of inner faces 16c facing each other in the front-rear direction X" are not formed, and the back and forth pairs (a pair) of the inner faces 16c, and The indented recessed portion 16a is formed integrally and opens upward. In addition, in the fluid bladder 15A, one attachment member 19 is disposed below the ear portion 18.

As described above, according to the fluid bladder 15 of the present embodiment, the closed portion 15 b is disposed at a position where the concave folded portion 16 is formed along the axial direction. Therefore, when the flexible tube 15a is filled with a fluid to expand it, the end portion in the axial direction of the flexible tube 15a expands in the direction in which the flexible tube 15a is sandwiched, thereby separating the inner surfaces of the recessed portions 16 from each other . Thereby, it is possible to suppress the occurrence of "a corner portion which is sharpened toward the outer side (upper side) of the up-down direction Z" at the end portion in the left-right direction Y of the flexible tube 15a. In addition, in addition to forming the recessed portion 16, as long as the position of the closed portion 15b is adjusted, the aforementioned corner portion can be prevented from occurring at the end portion in the left-right direction Y of the flexible tube 15a. The end portion in the up-down direction Z has a structure in which ear portions each having a triangular shape in plan view are additionally formed, and the fluid bladder 15 can be easily manufactured while suppressing man-hours.

In addition, when the flexible tube 15a is filled with a fluid to expand it, the inner surfaces 16c of the concave folded portions 16 fixed by the fixed portions 17 are restrained from each other. Accordingly, at the end in the axial direction of the flexible tube 15a, the outer peripheral surface located around the fixed portion 17 can be formed in a direction "into the radial direction of the flexible tube 15a, the recessed portion 16 is folded in" Orthogonal flat surface.

In addition, since the closing portion 15b and the fixing portion 17 can be integrated, the fluid bladder 15 can be manufactured more easily.

In addition, since the ear portion 18 is formed in the flexible tube 15a, the ear portion 18 can be provided with, for example, a mounting member 19 for mounting on the cushion device 10 or the like.

In addition, the ear portion 18 is arranged in the entire area of the flexible tube 15a along one of the aforementioned directions. Therefore, the area of the ear portion 18 can be largely secured, and for example, the number and shape of the mounting members 19 to be attached to the ear portion 18 can be selected with freedom.

In addition, the mounting member 19 formed on the ear portion 18 restricts the relative displacement between the adjacent plurality of fluid bladders 15, thereby improving the self-reliance of the fluid bladders 15.

In addition, the inside of the flexible tube 15a is divided into two filling chambers in one direction in which the concave folded portion 16 is folded. Accordingly, the flexible tube 15a can be easily urged to stand on its own in one of the directions. In addition, since the outer peripheral surface located around the fixed portion 17 can be formed into a flat surface shape orthogonal to the aforementioned one direction, the user's experience lying on the fluid bladder 15 can be improved.

In addition, according to the cushion device 10 of this embodiment, since the fluid bladder 15 is provided, each of the aforementioned effects can be achieved in the cushion device 10.

In addition, according to the manufacturing method of the fluid bladder 15 of the present embodiment, since the fixing step and the closing step are performed simultaneously, the fluid bladder 15 can be easily manufactured while suppressing man-hours.

    (Second Embodiment)    

Next, a fluid bladder 45 according to a second embodiment of the present invention will be described with reference to FIGS. 8 and 9.

In this second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and descriptions thereof will be omitted, and only differences will be described.

As shown in FIGS. 8 and 9, the fluid bladder 45 is connected to a plurality of fluid bladders 45 in the front-rear direction X to form a fluid bladder unit 50. In the illustrated example, the three fluid bladders 45 are connected to each other. The number of connected fluid bladder bags 45 may be two or four or more.

A connecting piece 40 is provided on the lower portion of the fluid bladder 45 and extends from the outer peripheral surface toward the front-rear direction X to the entire left-right direction Y, and connects the fluid bladder 15 adjacent to each other. The connecting piece 40 is integrated with the outer wall of the flexible tube 45a of each fluid bladder 45. As described above, the plurality of fluid pouches 45 are connected by the connecting sheet 40 to form the fluid pouch unit 50, whereby the operability of the fluid pouch 45 can be ensured in the cushion device 10.

In addition, in this embodiment, the ear portion 48 of the fluid bladder 45 is formed with a restriction portion 49 that is connected to another adjacent fluid bladder 45 and restricts the relative displacement between them. The restricting portion 49 extends from the end portion in the left-right direction Y of the ear portion 48 toward the front-rear direction X. The restriction portion 49 is formed in a long rectangular band shape in the front-back direction X when viewed from the left-right direction Y.

The restricting portions 49 formed in the ear portions 48 of the fluid bladder 15 adjacent to each other are connected to each other. In the example shown in the figure, two restriction portions 49 are formed on the ear portion 48 at different positions in the vertical direction Z, respectively. The upper portion of the restriction portion 49 is formed at the upper end portion of the ear portion 48, and the lower portion is formed at the central portion in the vertical direction Z. The restricting portions 49 are connected to each other by locking portions not shown in the drawing.

As described above, according to the fluid bladder 45 of this embodiment, the restriction portion 49 formed in the ear portion 48 restricts the relative displacement between the adjacent plurality of fluid bladders 45, thereby improving the self-reliance of the fluid bladder 45 Sex.

The technical scope of the present invention is not limited to the aforementioned embodiments, and various modifications can be added without departing from the scope of the present invention.

For example, in the above-mentioned embodiment, although the structure using the "fluid bladder 15 filled with air" as the fluid bladder is shown, the present invention is not limited to such a configuration, but may be filled with the interior. Fluid pouch for liquid.

In addition, although the structure of "the closed portion 15b and the fixed portion 17 are integrated" was shown in the above-mentioned embodiment, the present invention is not limited to this aspect. The closed portion and the fixed portion may form different individuals. For example, another form in which the fixed portion is located inside the left-right direction Y than the closed portion may be appropriately adopted.

Furthermore, in the above-mentioned embodiment, the structure in which the ear portion 18 which is connected to the entire area of the closed portion 15b in the up-down direction Z and projects toward the outside in the left-right direction Y is formed in the flexible tube 15a is shown. The invention is not limited to this aspect. The ear portion may not be connected to the entire area of the closing portion in the vertical direction Z, or the ear portion may not be formed on the flexible tube.

In addition, in the above-mentioned embodiment, the structure of the partition wall 15c which "provides the inside of the flexible tube 15a and divides it into two filling chambers in the vertical direction Z" is shown in the flexible tube 15a. Not limited to this aspect. The partition wall also partitions the inside of the flexible tube in a direction different from the vertical direction Z, or the partition wall may not be provided.

In addition, within the scope not departing from the gist of the present invention, the constituent elements in the aforementioned embodiment may be appropriately replaced with known constituent elements, and the aforementioned modification examples may be appropriately combined.

Claims (8)

    A fluid bladder is a fluid bladder having the following components: a flexible tube that can be filled with fluid inside; a pair of closed portions, in a state where the flexible tube is sandwiched in the radial direction, the inside of the flexible tube The peripheral surfaces are fixed to each other, and the two ends of the flexible tube are individually closed. The characteristic feature is that a concave fold is formed at an end in the axial direction of the flexible tube. In the radial direction of the tube, the closed portion is folded inward in one direction that intersects the direction in which the flexible tube is sandwiched, and the closed portion is provided with the concave fold formed along the axial direction. The location of the department.         The fluid pouch according to claim 1, wherein a pair of inner surfaces of the concave folded portion facing each other is formed with a fixing portion for fixing the inner surfaces to each other, and the closing portion and the fixing portion are integrated.         The fluid pouch according to claim 1 or claim 2, wherein the closed portion is disposed on an inner side facing the axial direction of the flexible tube than both end edges of the flexible tube, and on the flexible tube, An ear portion is formed to protrude from the closed portion toward the outer side in the axial direction.         The fluid pouch according to claim 3, wherein the closed portion extends along the one direction and is disposed along the one direction over the entire area of the flexible tube, and the ear portion is formed along the one direction. On the entire area of the aforementioned flexible tube.         The fluid bladder according to claim 3 or claim 4, wherein the ear portion is formed with a restriction portion connected to another fluid bladder and restricting relative displacement between the fluid bladder and the other fluid bladder.         The fluid bladder according to any one of claim 1 to claim 5, wherein the flexible tube is provided with a partition wall that divides the internal area of the flexible tube into two filling chambers, and the partition wall, The inside of the flexible tube is divided in the aforementioned one direction.         A cushion device is a cushion device having a plurality of fluid pouches, wherein the fluid pouch is the fluid pouch described in any one of claims 1 to 6.         A method for manufacturing a fluid pouch is the method for manufacturing a fluid pouch according to claim 2, characterized in that the fixed part and the closed part are formed simultaneously.