TWI710341B - Cushion device - Google Patents

Abstract

The present invention provides a fluid bladder that can be manufactured simply and conveniently while reducing man-hours.

The present invention is provided with "a flexible tube (15a) that can be filled with fluid"; "When the flexible tube (15a) is sandwiched in the radial direction, the inner peripheral surfaces of the flexible tube (15a) form each other In the fluid bladder (15) of the fluid bladder (15) that individually closes the openings at both ends of the flexible tube (15a), the axial end of the flexible tube (15a) is attached to the flexible tube In the radial direction of (15a), the closed portion (15b) is formed with a recessed folded portion (16) that is folded inward in a direction crossing the "direction in which the flexible tube (15a) is sandwiched", and the closed portion (15b) is arranged at a position where the recessed portion (16) is formed along the aforementioned axial direction.

Description

Cushion device

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

Conventionally, there has been known a fluid bladder, which is provided with a flexible tube that can be filled with fluid; when the flexible tube is sandwiched in the radial direction, the inner peripheral surfaces of the flexible tube form a fixed (adhesive) ), a closed part that individually closes the openings at both ends of the flexible tube. In this type of fluid bladder, when the flexible cylinder is filled with fluid, a corner is formed at the end of the flexible cylinder in the axial direction. The corner portion, in the radial direction of the flexible tube, tapers toward the outside of one of the directions crossing the "direction in which the flexible tube is sandwiched" at the closed portion.

In order to suppress the occurrence of the aforementioned corners, for example, a fluid bladder disclosed in Patent Document 1 below is known. The fluid bladder is a triangular shaped ear part in plan view that "at the end of the flexible tube in the axial direction, it has a bottom edge extending in the aforementioned clamping direction and an apex angle protruding outward in the axial direction" , After forming the closed portion, suppress the occurrence of the aforementioned corners.

[Prior Technical Literature] [Patent Literature]

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

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

The present invention is an invention developed in view of the above-mentioned circumstances, and its purpose is to provide a fluid bladder that can be manufactured simply and with reduced labor hours.

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

(1) A fluid bladder comprising: a flexible tube that can be filled with fluid; a pair of closed portions in which the inner peripheral surface of the flexible tube forms a solid body in a state where the flexible tube is sandwiched in the radial direction. The openings at both ends of the flexible tube are individually closed, and the feature is that at the axial end of the flexible tube, in the radial direction of the flexible tube, the closed portion is formed with a direction that crosses The recessed portion folded inside one direction of "the direction in which the flexible tube is sandwiched", and the closed portion is arranged at a position where the recessed portion is formed along the axial direction.

In the present invention, the closing portion is disposed at a position where the recessed portion is formed along the axial direction. Therefore, when the flexible cylinder is filled with fluid to expand it, the axial end of the flexible cylinder expands in the aforementioned clamping direction, and the inner surfaces of the concave folds are separated from each other. Thereby, it is possible to suppress the occurrence of "corner portions that taper toward the outside in one direction" at the ends of the flexible tube in the axial direction. In addition, in addition to the formation of the recessed portion, as long as the position of the closed portion is adjusted, the generation of the aforementioned corners at the axial end of the flexible tube can be suppressed. Therefore, compared with the radial end of the closed portion , The structure of separately forming the ears in a triangular shape in plan view can reduce man-hours and easily manufacture the fluid bladder.

(2) is the fluid bladder of (1) above, wherein a pair of inner surfaces of the recessed portion facing each other is formed with a fixing portion that fixes these 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 cylinder is filled with fluid to expand it, the inner surfaces of the concave folds fixed by the fixed part are restrained by each other. According to this, at the end of the flexible tube in the axial direction, the outer peripheral surface located around the fixed portion can be formed into a flat surface shape perpendicular to the aforementioned one direction.

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

(3) is the fluid bladder of (1) or (2) above, wherein the closing portion is arranged on the inner side of the axis of the flexible tube than the end edges of the flexible tube, and The tube may be formed with ears protruding from the closed portion toward the outer side in the axial direction.

In this case, since the ears are formed on the flexible tube, the ears can be provided with, for example, an attachment member for attaching the fluid bladder to the cushion device.

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

In this case, the ears are arranged over the entire area of the flexible tube along the aforementioned one direction. Therefore, the area of the ears can be greatly ensured, for example, the number and shape of the mounting members to be mounted on the ears can be selected freely.

(5) The fluid bladder described in (3) or (4) above, wherein the ear may be formed with a restricting portion connected to other fluid bladders to restrict relative displacement between each other.

In this case, the restricting portion formed in the ear portion restricts the relative displacement between the plurality of fluid bladders, and the self-standing of the fluid bladder can be improved.

(6) is any one of the fluid bladder bag of (1) to (5) above, wherein the flexible tube is provided with a partition wall that partitions the interior of the flexible tube into two filling chambers, and the partition wall, The inside of the flexible tube may also be divided in the 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 folding portion is folded. According to this, the flexible tube can be easily caused to stand on its own in the aforementioned one direction. 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, the user who lies on the fluid bladder can feel better in use.

(7) is the cushion device of the present invention, which is characterized by being a fluid bladder in any one of the above (1) to (6).

In this case, the aforementioned effects can be achieved in the cushion device.

(8) is the manufacturing method of the fluid bladder of the present invention, which is the manufacturing method of the fluid bladder of (2) above, characterized in that the fixing part and the sealing part are formed at the same time.

In this case, since the closing portion and the fixing portion are formed at the same time, it is possible to reduce man-hours and to easily manufacture the fluid bladder.

According to the present invention, man-hours can be suppressed and the fluid bladder can be manufactured simply.

10‧‧‧Cushion device

15, 25, 35, 45‧‧‧Fluid bladder

15a‧‧‧Flexible tube

15b、25b‧‧‧Closed part

16‧‧‧Concave fold

16c‧‧‧Inside

17‧‧‧Fixed part

18、48‧‧‧Ears

19、29‧‧‧Mounting member (restriction part)

40‧‧‧Link film

49‧‧‧Restriction Department

Figure 1: A schematic perspective view of the cushion device according to the first embodiment of the present invention.

Figure 2: A perspective view of the fluid bladder in the cushion device shown in Figure 1.

Figure 3: A front view of the axial end of the fluid bladder shown in Figure 2.

Figure 4: In the process of filling the fluid bladder shown in Figure 3 with air, (a) is a front view and (b) is a top view.

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

Figure 6: shows a modification of the fluid bladder of the first embodiment, in which (a) is the first modification, and (b) is a front view of the second modification.

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

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

Figure 9: A side view of the fluid bladder shown in Figure 8.

(First Embodiment)

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

As for the cushion device 10, a mattress device that allows the user to lie down and a seat cushion device that the user can sit on can be cited. In this embodiment, a mattress device is used as an example of the cushion device 10. Hereinafter, the structure of each part will be described using the front-rear direction X, the left-right direction Y, and the up-down direction Z of the cushion device 10.

As shown in Figure 1, the cushion device 10 includes: a cushion portion 11 for the user to lie down, an air supply and exhaust unit 12 that performs air supply and exhaust to the cushion portion 11, and a control for the supply and exhaust unit 12 Control unit 13.

The cushion portion 11 has a plurality of fluid bladder bags 15, and the fluid bladder 15 is filled with air by supplying air to the inside of the fluid bladder 15 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 corresponding to the weight of the user, the hardness of the cushion portion 11 can be made the most suitable for the user. hardness.

The fluid bladder 15 is a rod-shaped bladder extending in the left-right direction Y in the cushion portion 11. In the example shown in the figure, a plurality of fluid bladders 15 are arranged in the front-rear direction X to form a structure.垫子部11. The fluid bladder 15 is formed of, for example, a vinyl chloride (vinyl chloride) film or a film material such as urethane, and forms a circle around the central axis O1. The two peripheral ends are formed by welding, for example, Form a connection. In the welded portion of the aforementioned film material, a peripheral end line 15f extending in the left-right direction Y is formed. In this fluid bladder 15, the peripheral end line 15f is located at the lower end, and the part of the film material above the peripheral end line 15f forms a flexible tube 15a described later.

The fluid bladders 15 arranged adjacent to each other may be fixed to each other or not fixed to each other. The fluid bladder 15 may be attached to "a cover not shown in the drawing that integrally covers a plurality of fluid bladders 15" through a button and a string as an attachment member 19 described later, for example.

As shown in Figure 2, the fluid bladder 15 includes a flexible tube 15a that can be filled with fluid; in a state where the flexible tube 15a is sandwiched in the radial direction, the inner peripheral surfaces of the flexible tube 15a form a solid Adhering (adhesive), individually closing the openings of the two ends of the flexible tube 15a with the closed portion 15b. The central axis O1 of the flexible tube 15a extends in the left-right direction Y. In a plan view of the flexible tube 15a from the left-right direction Y, one of the radial directions perpendicular to the central axis O1 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.

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

As shown in Figure 4, at the end of the flexible tube 15a in the left-right direction Y is formed: in the radial direction of the flexible tube 15a, the closing portion 15b faces the direction intersecting the direction in which the flexible tube 15a is sandwiched One of the directions, that is, the concave folded portion 16 folded inside the vertical direction Z. The concave folding portion 16 is folded in one direction in the radial direction of the flexible tube 15a, and in the example shown in the figure, it is folded in toward the lower side of the vertical direction Z. In a state where air has been discharged from the fluid bladder 15 (flexible tube 15a), and in a state where the fluid bladder 15 has been folded in the front-rear direction X, the concave fold portion 16 is formed to extend across 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 recessed portion 16 is formed over the entire length of the flexible tube 15a in the left-right direction Y. The recessed portion 16 may also be formed on the upper surface and the lower surface, respectively.

The closing portion 15b is arranged at a position where the concave folding portion 16 is formed along the left-right direction Y. That is, the closed portion 15b and the recessed folding portion 16 overlap.

The closing portions 15b are individually formed as a pair at both ends of the fluid bladder 15 in the left-right direction Y. The closing portion 15b extends in the vertical direction Z and is arranged over the entire area of the flexible tube 15a. The closing portion 15b closes the openings at both ends of the flexible tube 15a by adhering the inner peripheral surfaces of the flexible tube 15a to each other. In the example shown in the figure, the closing 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 16c of the recessed folding portion 16 facing each other is formed with a fixing portion 17 that fixes these inner surfaces 16c to each other. The fixing portion 17 is formed integrally with the closing portion 15b. The fixing portion 17 and the closing portion 15b are formed by a weld line that longitudinally cuts the flexible cylinder 15a along the vertical direction Z.

In the state in which air has been filled in the fluid bladder 15, the concave fold portions 16 are individually formed at both ends of the outer surface of the flexible tube 15 a in the left-right direction Y toward the upper side.

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

In addition, in this embodiment, the closing portion 15b is arranged on the inner side of the axis of the flexible tube 15a than the end edges of the flexible tube 15a, and the flexible tube 15a is formed from the closing portion 15b in the left-right direction Ear 18 protruding from the outer side of Y. The ears 18 are individually formed at both ends of the flexible tube 15a in the left-right direction Y. The ears 18, when viewed from the front-rear direction X, are rectangular in the vertical direction Z.

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

One or more mounting members 19 may be arranged, or may be arranged at the center of the ear 18 in the upper and lower direction Z. In addition, metal snaps may also be used as the mounting member 19.

Next, a method of 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, a flexible tube 15a is formed.

Next, as for 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 of the vertical direction Z to form Concave fold 16. In the example shown in the figure, the recessed 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 that the concave folding portion 16 is formed over the entire length of the flexible tube 15a, and it is sufficient that at least the end of the flexible tube 15a in the left-right direction Y can be folded inward in the vertical direction Z. In addition, the concave folding portion 16 may also 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, in the air-filled state, is preferably the upper surface of the fluid bladder 15, which is located in the front-rear direction X at the center of the left-right direction Y The thickness dimension (hereinafter referred to as the width of the central part of the capsular bag) of 15% to 50%.

When the maximum depth of the concave fold line 16d is 15% or less of the width of the capsular bag at the center, it can be confirmed that slightly upwardly sharp corners are formed at the ends of the flexible tube 15a in the left-right direction Y. In addition, when the maximum depth of the concave fold line 16d is more than 50% of the width of the capsular bag at the center, it can be confirmed that the upper surface of the fluid bladder 15 will be in the front and rear direction X at the ends of the left and right direction Y. The thickness dimension (hereinafter referred to as the width of the capsular bag at the end portion) is larger than the width of the capsular bag at the center.

Next, as shown in Figure 5(b), at the open end of the flexible tube 15a, for example, by using a welding means not shown in the figure, the flexible tube 15a is sandwiched from both sides in the front-rear direction X to form welding, etc. As a result, the inner peripheral surfaces of the flexible tube 15a can be connected to each other in the entire area in the vertical direction Z. In this way, it is possible to simultaneously perform: the fixing step of fixing the pair of inner surfaces 16c of the concave folding portion 16 facing each other to each other; the closing step of closing the openings at both ends of the flexible tube 15a by the closing portion 15b.

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

Then, the attachment members 19 are arranged on both ends of the ear 18 in the upper and lower direction Z. In the example shown in the figure, the attachment member 19 located on the upper side is attached to the opposing portion 16 b of the concave folding portion 16.

When the fluid bladder 15 manufactured in the above manner is used as the cushion device 10, in the state where the plurality of fluid bladder bags 15 have been mounted on the cover of the cushion device 10 using the mounting member 19, the supply exhaust portion 12 and The control unit 13 fills the inside of the fluid bladder 15 with air.

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

In addition, when the receiving member that can be attached to the "mounting member 19 arranged on the ear 18 of the fluid bladder 15" is installed on the cover of the cushion device 10, the interval (pitch) in the front-rear direction X is preferably It is equal to the width of the capsular bag at the end. In this way, the gap between the fluid bladders 15 in the front and rear direction X can be reduced. When the user's hand is placed between the plurality of fluid bladders 15, the hand can be prevented from entering the gap formed between the fluid bladders 15.

As described above, by making the depth of the recessed portion 16 to be half of the aforementioned pitch, the gap between the fluid pockets 15 can be effectively reduced.

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

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

In addition, as for other aspects of the closed portion, it can also be formed: in the top view from the front and rear direction X, the more upward, the more toward the oblique line outside the left and right direction Y; or in the above-mentioned top view , The more you go upward, the more you go to the inclined line inside the left-right direction Y.

Next, as shown in FIG. 6(b), in the fluid bladder 35 of the second modification, a flat fastener extending in the vertical direction Z is provided as the attachment member 29 in the ear portion 18. The flat buckle is arranged so as to be located in substantially the entire area in the upper and lower direction Z of the ear 18. By using a flat fastener as the mounting member 29 as described above, the mounting and dismounting operation of the mounting member 19 can be made easier compared to a structure using a snap fastener. In addition, when the flat buckle is arranged in a wide range of the ear 18, the installation strength of the installation member 29 can be increased.

In addition, with regard to other aspects of the mounting member, the following structure may also be provided: a fixing hole is provided in the ear 18, and a "fixed rope with a node formed at each specific interval" is inserted through the "plurality arranged in the front and back" The fixing holes of the fluid bladder 15 in the direction X".

Next, as shown in Fig. 7, in the fluid bladder 15A of the third modification, the fixing portion 17 is not formed in the concave folding portion 16, and the inner surfaces 16c of the concave folding portion 16 are not fixed to each other . Therefore, in the recessed portion 16, the "front and back pair (a pair) of inner surfaces 16c opposed to each other in the front and rear direction X" is not formed, and the front and back pair (a pair) of inner surfaces 16c, and The concave folding concave portion 16a is formed integrally and opens upward. In addition, in the fluid bladder 15A, one mounting member 19 is arranged on the lower side of the ear 18.

As described above, according to the fluid bladder 15 of this embodiment, the closing portion 15b is arranged at a position where the recessed folding portion 16 is formed along the axial direction. Therefore, when the flexible cylinder 15a is filled with fluid to expand it, the axial end of the flexible cylinder 15a expands in the direction in which the flexible cylinder 15a is sandwiched, and the inner surfaces of the concave folds 16 are separated from each other. . Thereby, it is possible to suppress the occurrence of "corner portions that become sharp toward the outside (upper side) in the vertical direction Z" at the end portions in the left-right direction Y of the flexible tube 15a. In addition to the formation of the recessed fold portion 16, as long as the position of the closed portion 15b is adjusted, the occurrence of the aforementioned corners at the end of the flexible tube 15a in the left-right direction Y can be suppressed. Therefore, compared to the closed portion 15b The end portions in the vertical direction Z are separately formed with a structure in which the ear portions having a triangular shape in a plan view are additionally formed, which can reduce man-hours and can easily manufacture the fluid bladder 15.

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

In addition, since the ears 18 are formed on the flexible tube 15a, the ears 18 can be provided with, for example, an attachment member 19 for attaching to the cushion device 10 and the like.

In addition, the ear portions 18 are arranged in the entire area of the flexible tube 15a along the aforementioned one direction. Therefore, the area of the ear part 18 can be largely ensured. For example, the number and shape of the mounting members 19 attached to the ear part 18 can be selected freely.

In addition, the mounting member 19 formed on the ear part 18 restricts the relative displacement between a plurality of adjacent fluid bladder bags 15 and can improve the self-supporting of the fluid bladder 15.

In addition, the inside of the flexible tube 15a is divided into two filling chambers in one direction in which the concave folding portion 16 is folded. According to this, the flexible tube 15a can be easily caused to stand on its own in the aforementioned one direction. Moreover, since the outer peripheral surface around the fixing portion 17 can be formed into a flat surface shape perpendicular to the aforementioned one direction, the user who is lying on the fluid bladder 15 can have a better use experience.

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

In addition, according to the method of manufacturing the fluid bladder 15 of this embodiment, since the fixing step and the sealing step are performed at the same time, the man-hours can be reduced and the fluid bladder 15 can be manufactured simply.

(Second Embodiment)

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

In this second embodiment, the same parts as the constituent elements of the first embodiment are assigned the same reference numerals and their description is omitted, and only the differences will be described.

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

At the lower part of the fluid bladder 45, a connecting piece 40 that 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 is arranged. The connecting piece 40 is integrally formed with the outer wall of the flexible tube 45 a of each fluid bladder 45. As described above, the fluid bladder unit 50 is formed by connecting a plurality of fluid bladders 45 by the connecting sheet 40, whereby the operability of the fluid bladder 45 in the cushion device 10 can be ensured.

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

The restricting portions 49 formed on 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 restricting portions 49 are individually formed in the ear portions 48 at different positions in the vertical direction Z. Among the restricting parts 49, the upper part is formed at the upper end of the ear part 48, and the lower part is formed at the center part in the vertical direction Z. The restricting parts 49 are connected by locking parts that are not shown in the figure.

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

The technical scope of the present invention is not limited to the foregoing embodiment, and various modifications can of course be added without departing from the gist of the present invention.

For example, in the above-mentioned embodiment, the structure adopting the "fluid bladder 15 for filling the inside with air" is shown as the structure of the fluid bladder, but the present invention is not limited to such a mode, and the inside may be filled with Fluid pouch for liquid.

In addition, although in the above-mentioned embodiment, the structure where "the closing portion 15b and the fixing portion 17 are formed integrally" is shown, the present invention is not limited to such an aspect. The closed part and the fixed part may also be formed as different individuals. For example, another form in which the fixed part is located on the inner side of the left-right direction Y than the closed part can also be appropriately adopted.

In addition, although in the above-mentioned embodiment, the flexible tube 15a is formed with the "ear part 18 connected to the entire area of the closing part 15b in the vertical direction Z and protruding outward in the left-right direction Y" is shown, but The present invention is not limited to this aspect. The ears may not be connected to the entire area of the sealing part in the vertical direction Z, or the ears may not be formed in the flexible tube.

In addition, although in the above-mentioned embodiment, the flexible cylinder 15a is provided with a partition wall 15c that "divides the inside of the flexible cylinder 15a into two filling chambers in the vertical direction Z", but the present invention does not It's not limited to this way. The partition wall also partitions the interior of the flexible cylinder in a direction different from the up-down direction Z, or the flexible cylinder may not be provided with a partition wall.

In addition to this, within the scope not departing from the gist of the present invention, the constituent elements in the aforementioned embodiment can be appropriately replaced with conventional constituent elements, and the aforementioned modifications can also be appropriately combined.

12: Supply and exhaust section

15: fluid bladder

15a: Flexible tube

15b: closed part

15c: Zoning wall

15e: supply and exhaust port

16: concave fold

16a: concave folding recess

16b: Opposite part

16c: inside

17: Fixed part

18: ears

19: Installation member (restriction part)

O1: Central axis

X: front and back direction

Y: left and right direction

Z: Up and down direction

Claims (6)

A cushion device is provided with a plurality of fluid sacs. The fluid sacs are provided with: a flexible tube that can be filled with fluid; a pair of closing parts that individually seal both ends of the flexible tube; ears, Protruding from the closed portion toward the outside in the longitudinal direction of the flexible tube, a recessed portion that is folded downward is formed on the upper surface of the flexible tube, and the closed portion is in a state of being folded into the recessed portion The inner peripheral surfaces of the flexible tube are fixed to each other, and the upper surface and side portions of the flexible tube are formed by a sheet of film material. When the fluid is filled in the flexible tube, a part of the upper surface of the flexible tube The height is higher than the height of the aforementioned pair of closed parts. The cushion device according to claim 1, wherein the ear portion is formed with a restricting portion connected to another fluid bag and used to restrict relative displacement between each other. The cushion device according to claim 1 or claim 2, which further includes a fixing portion that fixes the inner surfaces of the recessed fold portions facing each other. The cushion device described in claim 1 or claim 2, wherein the aforementioned ear The part is formed along the vertical direction to cover the entire area of the flexible tube. The cushion device according to claim 1 or claim 2, wherein the flexible cylinder is provided with a partition wall that partitions the interior of the flexible cylinder into two filling chambers, and the partition wall partitions the flexible cylinder in the up and down direction. Scratch the inside of the tube. The cushion device according to claim 1 or claim 2, wherein an air supply and exhaust port is provided on the side surface of the flexible tube.

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