JP6913776B2 - Fluid cell, mat device, and method of manufacturing fluid cell - Google Patents

Description

The present invention relates to a fluid cell, a mat device, and a method for manufacturing a fluid cell.

Conventionally, the flexible cylinder that can be filled with fluid and the inner peripheral surface of the flexible cylinder are fixed to each other with the flexible cylinder sandwiched in the radial direction, and the openings at both ends of the flexible cylinder are separated. A fluid cell with a occluded closure is known. In this type of fluid cell, when the flexible cylinder is filled with fluid, a corner is formed at the axial end of the flexible cylinder. This corner portion is sharpened toward the outside in one direction that intersects the direction in which the flexible cylinder is sandwiched in the closing portion in the radial direction of the flexible cylinder.
In order to suppress the generation of the corner portion, for example, a fluid cell as shown in Patent Document 1 below is known. In this fluid cell, at the axial end of the flexible cylinder, a plan-viewing triangular ear portion having a base extending in the sandwiching direction and an apex angle protruding outward in the axial direction is closed. By forming after forming, the generation of the corner portion is suppressed.

Japanese Unexamined Patent Publication No. 10-5289

However, in the conventional fluid cell, it is necessary to separately form the ears after forming the closed portion, which increases the work man-hours.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fluid cell that can be easily manufactured with reduced man-hours.

In order to solve the above problems, the present invention proposes the following means.
(1) The flexible cylinder that can be filled with fluid and the inner peripheral surfaces of the flexible cylinder are fixed to each other with the flexible cylinder sandwiched in the radial direction, and both ends of the flexible cylinder are opened. In a fluid cell provided with a pair of closed portions that are individually closed, the flexible cylinder is attached to the axial end portion of the flexible cylinder at the closed portion in the radial direction of the flexible cylinder. A valley fold portion folded inward in one direction intersecting the sandwiching direction is formed, and the closed portion is arranged at a position where the valley fold portion is formed along the axial direction. It is characterized by.

In the present invention, the closed portion is arranged at a position where a valley fold portion is formed along the axial direction. Therefore, when the flexible cylinder is filled with a fluid and expanded, the axial end portion of the flexible cylinder tends to widen in the sandwiched direction so that the inner surfaces of the valley fold portions are separated from each other. .. As a result, it is possible to prevent the axial end of the flexible cylinder from having a corner portion that is sharp toward the outside in one direction. Further, if the position of the closed portion is adjusted after forming the valley fold portion, it is possible to suppress the formation of the corner portion at the axial end of the flexible cylinder, so that the closed portion is in the radial direction. A fluid cell can be easily manufactured with less man-hours, as compared with a configuration in which a plan-viewing triangular ear portion is separately formed at the end portion.

(2) In the fluid cell according to (1) above, a fixing portion for fixing these inner surfaces to each other is formed on a pair of inner surfaces of the valley fold portion facing each other, and the closing portion and the fixing portion are formed. The portions may be integrally formed.

In this case, when the flexible cylinder is filled with a fluid and expanded, the inner surfaces of the valley fold portions fixed to the fixed portions are restrained from each other. Therefore, at the axial end of the flexible cylinder, the outer peripheral surface located around the fixed portion can be formed into a flat surface orthogonal to the one direction.
Further, since the closed portion and the fixed portion can be integrally formed, the fluid cell can be manufactured more easily.

(3) In the fluid cell according to (1) or (2), the closing portion is arranged inside the flexible cylinder in the axial direction with respect to both end edges of the flexible cylinder, and the flexible cylinder is provided. May be formed with an ear portion protruding outward in the axial direction from the closed portion.

In this case, since the selvage portion is formed in the flexible cylinder, for example, an attachment member for attaching the fluid cell to the mat device can be arranged in the selvage portion.

(4) In the fluid cell according to the above (3), the closed portion extends along the one direction and is arranged over the entire area of the flexible cylinder along the one direction, and the ear portion is formed. It may be formed over the entire area of the flexible cylinder along the one direction.

In this case, the ears are arranged over the entire area of the flexible cylinder along the one direction. Therefore, a large area of the selvage portion can be secured, and for example, the number and shape of the mounting members to be attached to the selvage portion can be selected with a degree of freedom.

(5) The fluid cell according to (3) or (4) above, and the ear portion may be formed with a regulating portion that is connected to another fluid cell and regulates relative displacement with respect to each other.

In this case, the regulating portion formed on the selvage portion regulates the relative displacement between the plurality of fluid cells, and the independence of the fluid cells can be enhanced.

(6) A fluid cell according to any one of (1) to (5) above, wherein the flexible cylinder has a partition wall for partitioning the inside of the flexible cylinder into two filling chambers. The partition wall provided may partition the inside of the flexible cylinder in the one direction.

In this case, the inside of the flexible cylinder is divided into two filling chambers in the one direction in which the valley fold portion is folded. Therefore, the flexible cylinder can be easily made to stand on its own in one direction. Further, since the outer peripheral surface located around the fixed portion can be formed into a flat shape orthogonal to the one direction, it is possible to improve the usability of the user lying on the fluid cell.

(7) The mat device according to the present invention is characterized by being a fluid cell according to any one of (1) to (6) above.

In this case, in the mat device, each of the above-mentioned effects can be achieved.

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

In this case, since the fixed portion and the closed portion are formed at the same time, the man-hours can be reduced and the fluid cell can be easily manufactured.

According to the present invention, a fluid cell can be easily manufactured with reduced man-hours.

It is a schematic perspective view of the mat device which concerns on 1st Embodiment of this invention. It is a perspective view of the fluid cell in the mat device shown in FIG. It is a front view of the end portion in the axial direction of the fluid cell shown in FIG. It is (a) front view and (b) top view in the process of filling the fluid cell shown in FIG. 3 with air. It is a figure which shows (a) a valley folding process, (b) a closing process and a fixing process, and (c) a process of arranging a mounting member in the process of manufacturing the fluid cell shown in FIG. It is a front view which shows (a) 1st modification, (b) 2nd modification among the modification of the fluid cell which concerns on 1st Embodiment. It is a perspective view which shows the 3rd modification of the fluid cell which concerns on 1st Embodiment. It is a perspective view which shows the fluid cell which concerns on 2nd Embodiment of this invention. It is a side view of the fluid cell shown in FIG.

(First Embodiment)
Hereinafter, the mat device 10 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 6.
Examples of the mat device 10 include a bed device on which the user lies and a cushion device on which the user sits. In the present embodiment, the bed device is adopted as an example of the mat device 10. Hereinafter, the configuration of each part will be described using the front-rear direction X, the left-right direction Y, and the up-down direction Z in the mat device 10.

As shown in FIG. 1, the mat device 10 includes a mat unit 11 on which the user lies, an air supply / exhaust unit 12 that supplies and exhausts air to the mat unit 11, and a control unit 13 that controls the air supply / exhaust unit 12. , Is equipped.
The mat portion 11 has a plurality of fluid cells 15, and by supplying air to the inside of these fluid cells 15, air is filled and the load of the user lying on the mat portion 11 is supported. The internal pressure of the fluid cell 15 corresponds to the hardness of the mat portion 11, and by setting the internal pressure of the fluid cell 15 according to the weight of the user, the hardness of the mat portion 11 is optimal for the user. Can be made.

The fluid cell 15 is a rod-shaped cell extending in the left-right direction Y in the mat portion 11, and in the illustrated example, a plurality of fluid cells 15 are arranged in a row in the front-rear direction X, so that the mat portion 11 Consists of. The fluid cell 15 is formed of a film material such as a vinyl chloride film or a urethane film, is rolled around the central axis O1, and both peripheral ends thereof are connected by, for example, welding. A peripheral edge line 15f extending in the left-right direction Y is formed in the welded portion of the film material. In the fluid cell 15, the peripheral end line 15f is located at the lower end portion, and the portion of the film material located above the peripheral end line 15f forms the flexible cylinder 15a described later.
The fluid cells 15 arranged adjacent to each other may or may not be fixed to each other. The fluid cell 15 can also be attached to a cover (not shown) that integrally covers the plurality of fluid cells 15 via, for example, a button or a string as an attachment member 19 described later.

As shown in FIG. 2, in the fluid cell 15, the flexible cylinder 15a capable of filling the fluid inside and the inner peripheral surfaces of the flexible cylinder 15a are fixed to each other with the flexible cylinder 15a sandwiched in the radial direction. It is provided with a closing portion 15b that separately closes the openings at both ends of the flexible cylinder 15a. The central axis O1 of the flexible cylinder 15a extends along the left-right direction Y. In a plan view of the flexible cylinder 15a viewed from the left-right direction Y, one of the radial directions orthogonal to the central axis O1 extends along the vertical direction Z. The flexible cylinder 15a has a rectangular shape when viewed from the front-rear direction X and the left-right direction Y, respectively. The flexible cylinder 15a may be formed of a plurality of film materials.

The flexible cylinder 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 central portion of the flexible cylinder 15a in the vertical direction Z. The inside of the fluid cell 15 (flexible cylinder 15a) is partitioned into two filling chambers in the vertical direction Z by the partition wall 15c. Each filling chamber is separately provided with an air supply / exhaust port 15e for supplying and discharging air. Pipes forming the air supply / exhaust unit 12 are connected to each air supply / exhaust port 15e.

As shown in FIG. 4, the end of the flexible cylinder 15a in the left-right direction Y is one direction that intersects the radial direction of the flexible cylinder 15a in the direction in which the flexible cylinder 15a is sandwiched in the closing portion 15b. A valley fold portion 16 folded inward in the vertical direction Z is formed. The valley fold portion 16 is folded in one of the radial directions of the flexible cylinder 15a, and in the illustrated example, the valley fold portion 16 is folded toward the lower side in the vertical direction Z. In a state where air is discharged from the fluid cell 15 (flexible cylinder 15a), the valley fold portion 16 is formed over the entire length of the flexible cylinder 15a in the left-right direction Y while the fluid cell 15 is folded in the front-rear direction X. Has been done. That is, as shown in FIG. 4, in the process of filling the fluid cell 15 with air, the valley fold portion 16 is formed over the entire length of the flexible cylinder 15a in the left-right direction Y. The valley fold portion 16 may be formed on the upper surface and the lower surface, respectively.

The closing portion 15b is arranged at a position where the valley folding portion 16 is formed along the left-right direction Y. That is, the closing portion 15b is formed so as to overlap the valley folding portion 16.
A pair of closed portions 15b are formed separately at both ends of the fluid cell 15 in the left-right direction Y. The closing portion 15b extends along the vertical direction Z and is arranged over the entire area of the flexible cylinder 15a. The closing portion 15b closes the openings at both ends of the flexible cylinder 15a by adhering the inner peripheral surfaces of the flexible cylinder 15a to each other. In the illustrated example, the closing portion 15b is formed by welding the inner peripheral surfaces of the flexible cylinder 15a to each other.
As shown in FIGS. 2 and 3, a pair of inner surfaces 16c of the valley fold portion 16 facing each other are formed with a fixing portion 17 for fixing the inner surfaces 16c to each other. The fixing portion 17 is integrally formed with the closing portion 15b. The fixing portion 17 and the closing portion 15b are formed by a welding wire that vertically traverses the flexible cylinder 15a in the vertical direction Z.

When the fluid cell 15 is filled with air, the valley fold portions 16 are separately formed at both ends of the outer surface of the flexible cylinder 15a in the left-right direction Y on the upper surface facing upward.
The valley fold portion 16 includes a valley fold recess 16a and an opposing portion 16b. The valley fold portion 16 is recessed downward and opens upward. The valley fold recess 16a has a triangular shape in which two tops are arranged along the front-rear direction X and the remaining tops are arranged outside in the left-right direction Y when viewed from above. The facing portion 16b extends from the outer end portion of the valley fold recess 16a in the left-right direction Y toward the outside in the left-right direction Y. The facing portion 16b is formed by the pair of front and rear inner surfaces 16c of the valley folding portion 16 facing each other in the front-rear direction X. A fixing portion 17 is formed at an inner end portion of the facing portion 16b in the left-right direction Y.

Further, in the present embodiment, the closing portion 15b is arranged inside the flexible cylinder 15a in the left-right direction Y with respect to both end edges of the flexible cylinder 15a, and the flexible cylinder 15a is placed outside the closing portion 15b in the left-right direction Y. An ear portion 18 projecting toward the surface is formed. The ears 18 are separately formed at both ends of the flexible cylinder 15a in the left-right direction Y. The selvage portion 18 has a long rectangular shape in the vertical direction Z when viewed from the front-rear direction X.

Two mounting members (regulatory portions) 19 are arranged at both ends of the selvage portion 18 in the vertical direction Z at intervals in the vertical direction Z. In the illustrated example, the mounting member 19 is a synthetic resin snap button arranged in a hole formed in the ear portion 18. With this mounting member 19, the fluid cell 15 is mounted on a cover (not shown) of the mat device 10. The mounting member 19 is connected to another fluid cell 15 via the cover, and functions as a regulating unit that regulates relative displacement with respect to each other.
The mounting members 19 may be arranged at one or three or more, or may be arranged at the central portion of the selvage portion 18 in the vertical direction Z. Further, a metal snap button may be adopted as the mounting member 19.

Next, a method of manufacturing the fluid cell 15 will be described with reference to FIG.
First, the film material forming the fluid cell 15 is rolled around the central axis O1 and connected by welding the two peripheral ends thereof to form the peripheral end line 15f. As a result, the flexible cylinder 15a is formed.
Next, as a valley folding step, as shown in FIG. 5A, the upper end portion of the outer peripheral surface of the flexible cylinder 15a extending along the left-right direction Y is folded toward the inside of the vertical direction Z, and the valley is folded. The folded portion 16 is formed. In the illustrated example, a valley fold portion 16 parallel to the central axis O1 is formed over the entire length of the flexible cylinder 15a. In the valley folding step, it is not always necessary to form the valley folding portion 16 over the entire length of the flexible cylinder 15a, and at least the end portion of the flexible cylinder 15a in the left-right direction Y is folded toward the inside of the vertical direction Z. Sufficient. Further, the valley fold portion 16 may be formed so as to be inclined with respect to the central axis O1.

The maximum depth of the valley fold line 16d defined in the groove bottom of the valley fold portion 16 is the front-rear direction X in the central portion of the left-right direction Y of the upper surface of the fluid cell 15 in a state of being filled with air. It is preferably 15% to 50% of the thickness dimension (hereinafter referred to as the cell width in the central portion).
When the maximum depth of the valley fold line 16d is 15% or less of the cell width in the central portion, a slightly upwardly pointed corner portion is generated at the end of the flexible cylinder 15a in the left-right direction Y. Has been confirmed. When the maximum depth of the valley fold line 16d is 50% or more of the cell width in the central portion, the thickness dimension of the front-rear direction X at both ends of the fluid cell 15 in the left-right direction Y (hereinafter). , The cell width at the end) has been confirmed to be larger than the cell width at the center.

Next, as shown in FIG. 5B, at the open end of the flexible cylinder 15a, for example, the flexible cylinder 15a is sandwiched from both sides in the front-rear direction X by welding means (not shown) and welded. The inner peripheral surfaces of the flexible cylinders 15a are connected to each other over the entire area in the vertical direction Z. As a result, the fixing step of fixing the pair of inner surfaces 16c of the valley fold portion 16 facing each other to each other and the closing step of closing both end openings of the flexible cylinder 15a by the closing portion 15b are performed at the same time.
As shown in FIG. 5 (c), by this welding operation, closing portions 15b extending along the vertical direction Z are formed at both ends of the flexible cylinder 15a in the left-right direction Y, and among the closing portions 15b, The fixing portion 17 is formed at a portion of the valley fold portion 16 located above the valley fold line 16d. Further, in the flexible cylinder 15a, the ear portions 18 are separately formed in the portions located outside the closing portion 15b in the left-right direction Y. By performing this welding operation at the same time when both peripheral ends of the film material are welded to each other to form the peripheral end line 15f as described above, the peripheral end line 15f, the closing portion 15b, and the fixing portion 17 are formed. It may be formed at the same time.

Then, the mounting members 19 are arranged at both ends of the selvage portion 18 in the vertical direction Z. In the illustrated example, the mounting member 19 located on the upper side is mounted on the facing portion 16b in the valley fold portion 16.
When the fluid cell 15 manufactured in this manner is used as the mat device 10, the air supply / exhaust unit 12 and the control are performed in a state where the plurality of fluid cells 15 are attached to the cover of the mat device 10 by using the attachment member 19. The inside of the fluid cell 15 is filled with air using the portion 13.

Here, in the state of being filled with air, the cell width at the end is about twice the depth up to the valley fold line 16d at the valley fold portion 16. Therefore, the depth of the valley fold portion 16 can be set based on the cell width of the end portion when filled with air.
Further, the interval (pitch) in the front-rear direction X when the receiving member to which the mounting member 19 arranged on the ear portion 18 of the fluid cell 15 is mounted is provided on the cover of the mat device 10 is equivalent to the cell width at the end portion. Is preferable. As a result, the gap between the fluid cells 15 in the front-rear direction X can be narrowed, and when the user puts his / her hand between the plurality of fluid cells 15, the hand is formed in the gap between the fluid cells 15. You can prevent it from entering.
From the above, it can be said that the gap between the fluid cells 15 can be effectively narrowed by making the depth of the valley fold portion 16 half the size of the pitch.

Next, a modified example of the fluid cell 15 will be described.
As shown in FIG. 6A, in the fluid cell 25 of the first modification, the closed portion 25b is gradually formed in a curved shape gradually toward the outside in the left-right direction Y as it goes inward in the vertical direction Z. Has been done. By forming the closing portion 25b in this way, it is possible to easily secure portions for arranging the mounting members 19 at both ends of the selvage portion 18 in the vertical direction Z. According to this configuration, when the selvage portion 18 is folded in the front-rear direction X, the mounting member 19 is a fluid cell, as compared with the case where the closing portion 25b is formed in a straight line extending along the vertical direction Z. It can be easily arranged near the central portion of the front-rear direction X in 25.
Further, as another aspect of the closed portion, in the plan view seen from the front-rear direction X, the inclined line gradually goes upward and outward in the left-right direction Y, and in the plan view, the gradual and left-right direction gradually goes up. It may be formed so as to form an inclined line toward the inside of Y.

Next, as shown in FIG. 6B, in the fluid cell 35 of the second modification, a hook-and-loop fastener extending in the vertical direction Z is arranged on the selvage portion 18 as a mounting member 29. The hook-and-loop fasteners are arranged over substantially the entire vertical direction Z of the selvage portion 18. By adopting the hook-and-loop fastener as the mounting member 29 in this way, it is possible to facilitate the attachment / detachment work of the mounting member 19 as compared with the configuration in which the snap button is adopted. Further, when the surface fastener is arranged over a wide range of the ear portion 18, the attachment strength by the attachment member 29 can be increased.
Further, as another aspect of the mounting member, a fixing hole is provided in the selvage portion 18, and a fixing string having knots formed at predetermined intervals is passed through each fixing hole of a plurality of fluid cells 15 arranged in the front-rear direction X. It may be configured to penetrate.

Next, as shown in FIG. 7, in the fluid cell 15A of the third modification, the fixing portion 17 is not formed in the valley fold portion 16, and the inner surfaces 16c of the valley fold portion 16 are not fixed to each other. Therefore, the valley fold portion 16 is not formed with a pair of front and rear inner surfaces 16c facing each other in the front-rear direction X, and the pair of front and rear inner surfaces 16c are integrated with the valley fold recess 16a. It opens upward. Further, in the fluid cell 15A, one mounting member 19 is arranged on the lower side of the selvage portion 18.

As described above, according to the fluid cell 15 according to the present embodiment, the closed portion 15b is arranged at a position where the valley fold portion 16 is formed along the axial direction. Therefore, when the flexible cylinder 15a is filled with a fluid and expanded, the flexible cylinder 15a is provided so that the axial ends of the flexible cylinder 15a are separated from each other by the inner surfaces of the valley fold portions 16. It tries to spread in the direction of being sandwiched. As a result, it is possible to prevent the end of the flexible cylinder 15a in the left-right direction Y from having a sharp corner portion toward the outside (upper side) in the vertical direction Z. Further, if the position of the closing portion 15b is adjusted after forming the valley folding portion 16, it is possible to suppress the formation of the corner portion at the end portion of the flexible cylinder 15a in the left-right direction Y, and thus the closing portion. The fluid cell 15 can be easily manufactured with less man-hours, as compared with a configuration in which a plan-viewing triangular ear portion is separately formed at the end portion of the 15b in the vertical direction Z.

Further, when the flexible cylinder 15a is filled with a fluid and expanded, the inner surfaces 16c of the valley fold portions 16 fixed to the fixing portions 17 are restrained from each other. Therefore, at the axial end of the flexible cylinder 15a, the outer peripheral surface located around the fixed portion 17 is flat and orthogonal to the one direction in which the valley fold portion 16 is folded in the radial direction of the flexible cylinder 15a. It can be formed in a planar shape.
Further, since the closed portion 15b and the fixed portion 17 can be integrally formed, the fluid cell 15 can be manufactured more easily.

Further, since the selvage portion 18 is formed on the flexible cylinder 15a, for example, a mounting member 19 or the like for mounting on the mat device 10 can be arranged on the selvage portion 18.
Further, the selvage portion 18 is arranged over the entire area of the flexible cylinder 15a along the one direction. Therefore, a large area of the selvage portion 18 can be secured, and for example, the number and shape of the mounting members 19 to be attached to the selvage portion 18 can be freely selected.

Further, the attachment member 19 formed on the selvage portion 18 regulates the relative displacement between the plurality of adjacent fluid cells 15, and the independence of the fluid cells 15 can be enhanced.
Further, the inside of the flexible cylinder 15a is divided into two filling chambers in one direction in which the valley fold portion 16 is folded. Therefore, the flexible cylinder 15a can be easily made to stand on its own in the one direction. Further, since the outer peripheral surface located around the fixing portion 17 can be formed into a flat shape orthogonal to the one direction, the user lying on the fluid cell 15 can be comfortably used.

Further, according to the mat device 10 according to the present embodiment, since the mat device 10 has the fluid cell 15, each of the above-mentioned effects can be achieved in the mat device 10.
Further, according to the method for manufacturing the fluid cell 15 according to the present embodiment, since the fixing step and the closing step are performed at the same time, the fluid cell 15 can be easily manufactured with less man-hours.

(Second Embodiment)
Next, the fluid cell 45 of the second embodiment according to the present invention will be described with reference to FIGS. 8 and 9.
In the second embodiment, the same parts as the components in the first embodiment are designated by the same reference numerals, the description thereof will be omitted, and only the different points will be described.
As shown in FIGS. 8 and 9, in the fluid cell 45, a plurality of fluid cells 45 are connected to each other in the front-rear direction X to form a fluid cell unit 50. In the illustrated example, the three fluid cells 45 are connected to each other. The number of fluid cells 45 to be connected may be two or four or more.

At the lower part of the fluid cell 45, a connecting piece 40 extending from the outer peripheral surface in the front-rear direction X over the entire area in the left-right direction Y and connecting the fluid cells 15 adjacent to each other is arranged. The connecting piece 40 is integrally formed with the outer wall of the flexible cylinder 45a in each fluid cell 45. By connecting the plurality of fluid cells 45 with the connecting piece 40 to form the fluid cell unit 50 in this way, the handleability of the fluid cell 45 can be ensured in the mat device 10.

Further, in the present embodiment, the selvage portion 48 of the fluid cell 45 is connected to another adjacent fluid cell 45, and a regulation portion 49 is formed to regulate the relative displacement of each other. The regulating portion 49 extends from the end of the selvage portion 48 in the left-right direction Y toward the front-rear direction X. The regulating portion 49 is formed in a rectangular band shape that is long in the front-rear direction X when viewed from the left-right direction Y.
The regulating portions 49 formed in the selvage portions 48 of the fluid cells 15 adjacent to each other are connected to each other. In the illustrated example, the selvage 48 is formed with two regulating portions 49 at different positions in the vertical direction Z. Among the regulating portions 49, those located above are formed at the upper end portion of the selvage portion 48, and those located below are formed at the central portion in the vertical direction Z. The restricting portions 49 are connected to each other by locking each other with locking portions (not shown).

As described above, according to the fluid cell 45 according to the present embodiment, the relative displacement between the plurality of adjacent fluid cells 45 is regulated by the regulating portion 49 formed in the ear portion 48, and the fluid cell 45 becomes independent. It can enhance the sex.

The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above embodiment, the configuration in which the fluid cell 15 filled with air is adopted as the fluid cell has been shown, but the present invention is not limited to such an embodiment, and a fluid cell filled with a liquid may be used.

Further, in the above embodiment, the closed portion 15b and the fixed portion 17 are integrally formed, but the present invention is not limited to such an embodiment. The closed portion and the fixed portion may be formed separately, and for example, another form in which the fixed portion is located inside the closed portion in the left-right direction Y can be appropriately adopted.

Further, in the above embodiment, the flexible cylinder 15a is connected to the closing portion 15b over the entire area in the vertical direction Z, and the ear portion 18 is formed so as to project outward in the horizontal direction Y. It is not limited to such an aspect. The selvage portion may not be connected to the obstruction portion over the entire area in the vertical direction Z, or the selvage portion may not be formed in a flexible cylinder.

Further, in the above embodiment, the flexible cylinder 15a is provided with a partition wall 15c for partitioning the inside of the flexible cylinder 15a into two filling chambers in the vertical direction Z. Not limited to. The partition wall may partition the inside of the flexible cylinder in a direction different from the vertical direction Z, and the flexible cylinder may not be provided with the partition wall.

In addition, it is possible to replace the components in the embodiment with well-known components as appropriate without departing from the spirit of the present invention, and the above-mentioned modifications may be appropriately combined.

10 Mat device 15, 25, 35, 45 Fluid cell 15a Flexible cylinder 15b, 25b Closure part 16 Valley fold part 16c Inner surface 17 Fixation part 18, 48 Ear part 19, 29 Mounting member (regulation part)
40 Connection piece 49 Regulator

Claims (8)

A flexible cylinder that can be filled with fluid inside,
A pair of closed portions that individually close the openings at both ends of the flexible cylinder,
With
A valley fold portion that is folded downward over the entire length of the flexible cylinder is formed on the upper surface of the flexible cylinder.
An air cell in which the height of a part of the upper surface of the flexible cylinder is higher than the height of the pair of closed portions when the flexible cylinder is filled with a fluid. A selvage portion that projects outward from the obstruction portion in the longitudinal direction of the flexible cylinder is further provided.
The air cell according to claim 1, wherein a regulating portion is formed on the ear portion, which is connected to another air cell and regulates relative displacement with respect to each other. Wherein disposed inside the closed portion comprising an end portion in the longitudinal direction of the flexible tube, the air cells of the previous SL claim 1 or 2 further comprising a fixing portion for fixing the inner surfaces facing each other at a valley fold portions .. The air cell according to claim 1 or 2 , wherein the closed portion fixes inner surfaces facing each other at the valley fold portion. The air cell according to claim 2, wherein the ear portion is formed over the entire area of the flexible cylinder along the vertical direction. The flexible cylinder is provided with a partition wall for partitioning the inside of the flexible cylinder into two filling chambers.
The air cell according to any one of claims 1 to 5 , wherein the partition wall partitions the inside of the flexible cylinder in the vertical direction. The air cell according to any one of claims 1 to 6 , wherein an air supply / exhaust port is provided on a side surface of the flexible cylinder. A mat device including a plurality of air cells according to any one of claims 1 to 7.

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