JPH0592501U - Bladder for accumulator - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent buckling stress from concentrating on a part of the bending reversal portion and suppress buckling of the bending reversal portion. [Structure] An annular member (14A, 14B) is provided corresponding to at least one of an inner side inflection point R _I and an outer side inflection point R _O with respect to a bending reversal portion (11C) of an elastic material layer (11). To do. [Effect] It is possible to prevent the buckling stress from concentrating on a part of the bending reversal portion and suppress the occurrence of buckling on the bending reversal portion.

Description

[Detailed description of the device]

[0001]

[The purpose of the device]

[0002]

[Industrial applications]

 The present invention is for an accumulator in which an elastic mounting portion formed on the inner peripheral surface of the elastic material layer is pressed by a mounting member so that the outer peripheral surface of the elastic material layer contacts the inner peripheral surface of the shell of the accumulator. The present invention relates to a bladder, and more particularly to an accumulator bladder in which an annular member is arranged corresponding to at least one of an inner side inflection point and an outer side inflection point with respect to a bending reversal portion of an elastic material layer.

[0003]

[Prior Art]

 Conventionally, as this kind of accumulator bladder, the central portion and the peripheral portion are connected to each other through a curved inversion portion, and the peripheral portion is arranged by pressing the inner peripheral surface of the shell of the accumulator by a mounting member. As a result, the internal space of the shell is divided into a gas chamber and a liquid chamber, the central part of the shell projects toward the end face of the peripheral edge in the unloaded state, and as the liquid pressure in the liquid chamber decreases, Part moves toward the liquid chamber (also referred to as "discharging direction"), and the central part moves toward the gas chamber (also called "suction direction") as the liquid pressure in the liquid chamber increases. What to do was suggested.

[0004]

[Problems to be solved]

 However, in the conventional accumulator bladder, the central part and the peripheral part are only connected to each other via the curved inversion part, so (i) the central part moves in the gas chamber direction (that is, the suction direction). Alternatively, when moving in the direction of the liquid chamber (that is, in the discharge direction), there is a disadvantage that buckling stress concentrates in a part in the region between the vicinity of the outer inflection point and the vicinity of the inner inflection point of the bending reversal part, and eventually (ii) There is a drawback that buckling is likely to occur in the region between the outer inflection point and the inner inflection point of the bending reversal part, and in particular, (ii) the elastic material layer is made of a resin material with low elasticity. In that case, there is a drawback that buckling is more likely to occur, durability is lacking, and life cannot be extended.

In the conventional accumulator bladder, when the gas shielding layer is laminated on the elastic material layer, (iv) the elasticity of the elastic material layer and the elasticity of the gas shielding layer generally do not match. The buckling stress is more likely to be concentrated on a part of the region between the outer inflection point and the inner inflection point of the bending reversal portion, and buckling is likely to occur.

Therefore, in order to eliminate these drawbacks, the present invention provides an annular member corresponding to at least one of the inner inflection point and the outer inflection point with respect to the bending reversal portion of the elastic material layer. By doing so, the buckling stress is prevented from concentrating on a part of the bending reversal portion, and the bladder for the accumulator that suppresses the occurrence of buckling on the bending reversal portion is provided.

[0007]

[Device configuration]

[0008]

[Means for solving problems]

According to the present invention, there is provided a solution to the problem, "An elastic mounting formed on the inner peripheral surface of the elastic material layer so that the outer peripheral surface of the elastic material layer contacts the inner peripheral surface of the shell of the accumulator. In the accumulator bladder in which the portion is pressed by the mounting member, at least one of the inner inflection point R _I and the outer inflection point R _O with respect to the bending inversion portion (11C) of the elastic material layer This is an accumulator bladder characterized by being provided with annular members (14A, 14B).

[0009]

[Action]

 The bladder for accumulator according to the present invention presses the elastic mounting portion formed on the inner peripheral surface of the elastic material layer by the mounting member so that the outer peripheral surface of the elastic material layer contacts the inner peripheral surface of the shell of the accumulator. A bladder for an accumulator which is configured as described above in the section [Means for Solving Problems], in particular, an inflection point and an inflection point with respect to the bending reversal portion of the elastic material layer. Since the annular member is arranged corresponding to at least one of the two, (i) it has the effect of preventing the buckling stress from concentrating on a part of the bending reversal part, which results in (ii) the bending. It has the effect of suppressing buckling of the reversal portion, and eventually (iii) has the function of ensuring durability and extending the life even when it is made of a resin material having low elasticity.

[0010]

【Example】

 Next, the bladder for accumulator according to the present invention will be described in detail with reference to the accompanying drawings, with reference to its preferred embodiments.

However, the embodiments described below are described for facilitating or facilitating the understanding of the present invention, and not for limiting the present invention.

In other words, each element disclosed in the embodiments described below includes all design changes and equivalent replacements within the spirit and scope of the present invention.

(Description of the accompanying drawings)

FIG. 1 is a sectional view showing a first embodiment of an accumulator bladder according to the present invention, in which annular members 14A and 14B are both disposed on an inner peripheral surface of an elastic material layer 11. The case is shown.

FIG. 2 is a cross-sectional view showing a usage state of the embodiment shown in FIG. 1, showing a case of no load.

FIG. 3 is a sectional view showing a second embodiment of the accumulator bladder according to the present invention, in which both annular members 14A and 14B are arranged on the outer peripheral surface of the elastic material layer 11. The case is shown.

FIG. 4 is a cross-sectional view showing a third embodiment of the accumulator bladder according to the present invention, in which the annular members 14A and 14B are arranged on the inner peripheral surface and the outer peripheral surface of the elastic material layer 11, respectively. The case where it is installed is shown.

FIG. 5 is a sectional view showing a fourth embodiment of the accumulator bladder according to the present invention. The annular members 14A and 14B are arranged on the outer peripheral surface and the inner peripheral surface of the elastic material layer 11, respectively. The case where it is installed is shown.

FIG. 6 is a sectional view showing a fifth embodiment of the accumulator bladder according to the present invention. In the case where the annular member 14 A is arranged on the inner peripheral surface of the elastic material layer 11, Shows.

FIG. 7 is a sectional view showing a sixth embodiment of the accumulator bladder according to the present invention, showing a case where the annular member 14A is disposed on the outer peripheral surface of the elastic material layer 11. ing.

FIG. 8 is a sectional view showing a seventh embodiment of the accumulator bladder according to the present invention. In the case where the annular member 14B is arranged on the inner peripheral surface of the elastic material layer 11, Shows.

FIG. 9 is a sectional view showing an eighth embodiment of the accumulator bladder according to the present invention, showing a case where the annular member 14B is arranged on the outer peripheral surface of the elastic material layer 11. ing.

FIG. 10 is a sectional view showing a ninth embodiment of the accumulator bladder according to the present invention, in which the annular members 14A and 14B are arranged inside the elastic material layer 11, respectively. Is shown.

FIG. 11 is a sectional view showing a tenth embodiment of the accumulator bladder according to the present invention, showing a case where the annular member 14A is disposed inside the elastic material layer 11. ing.

FIG. 12 is a sectional view showing an eleventh embodiment of the accumulator bladder according to the present invention, showing a case where the annular member 14B is arranged inside the elastic material layer 11. ing.

(Structure of First Embodiment)

First, the configuration of a first embodiment of the accumulator bladder according to the present invention will be described in detail with reference to FIGS. 1 and 2.

Reference numeral 10 denotes an accumulator bladder according to the present invention, which includes a central portion 11A, a peripheral portion 11B having end faces formed in the unloaded state toward the protruding direction, and a central portion 11A and the peripheral portion 11B. An elastic material layer 11 made of an appropriate elastic material such as rubber and having a curved reversal portion 11C for connecting the elastic material layer 11 and a gas disposed inside the elastic material layer 11 if desired. The shielding layer 12, the poppet 13 disposed on the outer peripheral surface of the central portion 11A of the elastic material layer 11 (that is, the surface located on the liquid chamber 21B side, which will be described later), and the curved inversion portion 11C of the elastic material layer 11. Corresponding to the inner side inflection point R _I and the outer side inflection point R _O , the elastic material layer 11 is arranged on the inner peripheral surface (that is, the surface located on the gas chamber 21A side described later) of the bending reversal portion 11C. The two annular members 14A and 14B are provided. Here, the inner inflection point R _I and the outer inflection point R _O are the connecting portions between the bending reflex portion 11C and the central portion 11A and the peripheral portion 11B, respectively, and are curved from the central portion 11A. It refers to a portion where the curvature changes toward the inverted portion 11C and becomes discontinuous, and also refers to a portion where the curvature changes toward the peripheral portion 11B from the curved reaction portion 11C and becomes discontinuous.

When the accumulator bladder 10 according to the present invention is attached to the inner peripheral surface of the shell 21 of the accumulator 20 by the attaching member 22 on the elastic material layer 11 as described later, In order to secure a sufficient seal between them, (i) the thick elastic mounting portion 11a extended along the end face of the peripheral edge portion 11B is formed by using an appropriate elastic material such as rubber. And (ii) at least one elastic projection 11b extending along the end face of the peripheral edge portion 11B is also formed on the outer peripheral surface of the peripheral edge portion 11B.

Although not shown, the gas shielding layer 12 is made of polyvinyl alcohol resin, polyvinyl fluoride resin or chlorinated resin on at least one surface of a reinforcing material such as woven fabric (for example, knitted fabric) or nonwoven fabric. It is formed of a resin film having low gas permeability made of vinylidene resin or the like or a gas shielding film made of metal foil, and at least one reinforcing material and one gas shielding film are provided. However, the gas shielding layer 12 may be formed of at least one layer of the gas shielding film by omitting the reinforcing material, if desired.

The annular members 14A and 14B prevent buckling stress from concentrating on a part of the curved inversion part 11C, and are made of an appropriate material such as metal or plastic, and at least a part thereof is made of an elastic material. It is arranged so as to be buried in the layer 11.

Reference numeral 20 denotes an accumulator, and the internal space of the shell 21 is divided into a gas chamber 21A and a liquid chamber 21B by the accumulator bladder 10 according to the present invention. That is, the accumulator bladder 10 according to the present invention is arranged by contacting the outer peripheral surface of the peripheral edge portion 11B thereof with the inner peripheral surface of the shell 21 of the accumulator 20 and then elastically mounting by the mounting member 22. By pressing the mounting portion 11a toward the inner peripheral surface of the shell 21, it is arranged with respect to the inner peripheral surface of the shell 21, and the internal space of the shell 21 is divided into a gas chamber 21A and a liquid chamber 21B. ..

The gas chamber 21A of the shell 21 is filled with an appropriate gas (for example, nitrogen gas) from the gas supply port 23a, and then the gas supply port 23a is closed by the closing member 23 and the sealing member 23b. It is enclosed by.

The liquid chamber 21 B of the shell 21 is provided with a liquid inlet / outlet member (so-called “oil port”) 24 having a liquid proposal inner hole 24 a whose inner opening can be closed by the poppet 13. Therefore, in the liquid chamber 21B, by screwing the screw portion of the liquid supply pipe with the screw portion 24b formed on the peripheral surface of the liquid inlet / outlet member 24, an appropriate liquid supply source ( (Not shown), and an appropriate amount of liquid is supplied according to the liquid pressure of the liquid supply source.

(Operation of First Embodiment)

Next, with reference to FIGS. 1 and 2, the operation of the first embodiment of the accumulator bladder according to the present invention will be described in detail while briefly explaining the function of the accumulator 20. ..

When there is no load

In the accumulator bladder 10 according to the present invention, in the unloaded state, the central portion 11 A is inverted by the curved inversion portion 11 C and protrudes toward one side (that is, the side corresponding to the gas chamber 21 A). , Projecting in the same direction as the end face of the peripheral portion 11B (see FIGS. 1 and 2).

At this time, since no load is applied to the elastic material layer 11 on both the inner peripheral surface side and the outer peripheral surface side, the elastic material layer 11 is not deformed. Therefore, no stress is generated in the curved inversion portion 11 C.

During liquid ejection

In the accumulator bladder 10 according to the present invention, when the liquid pressure of the liquid supply source decreases, the central portion 11A of the accumulator bladder 10 is directed toward the liquid chamber 21B (that is, toward the "discharging direction") by the arrow. It gradually moves as indicated by A, and stops at a position where the pressures applied to both surfaces thereof (that is, the gas pressure in the gas chamber 21A and the liquid pressure in the liquid chamber 21B) are in equilibrium with each other.

At this time, in the bending reversal portion 11C, the elastic material layer 11 is expanded on the inner peripheral surface side and contracted on the outer peripheral surface side.

However, in the accumulator bladder 10 according to the present invention, the ring-shaped members 14A and 14B corresponding to the inner inflection point R _I and the outer inflection point R _O of the inner peripheral surface of the elastic material layer 11, respectively. Since (i) the buckling stress is uniformly distributed to the bending reversal portion 11C, (ii) the buckling stress is concentrated on a part of the bending reversal portion 11C. This can be avoided, and as a result (iii) it is possible to suppress the occurrence of buckling in the bending reversal portion 11C.

During liquid inhalation

On the other hand, when the liquid pressure of the liquid supply source increases, in the accumulator bladder 10 according to the present invention , the central portion 11A is directed toward the gas chamber 21A (that is, the "intake direction") by the arrow. It gradually moves as indicated by B, and stops at a position where the pressures applied to both surfaces thereof (that is, the gas pressure in the gas chamber 21A and the liquid pressure in the liquid chamber 21B) are in equilibrium with each other.

At this time, in the bending reversal portion 11C, the elastic material layer 11 is contracted on the inner peripheral surface side and expanded on the outer peripheral surface side.

However, in the bladder 10 for accumulator according to the present invention, the annular members 14A and 14B are provided on the inner peripheral surface of the elastic material layer 11 in correspondence with the inner inflection point R _I and the outer inflection point R _O , respectively. Since it is arranged, (i) the buckling stress can be evenly distributed and applied to the bending reversal portion 11C, and (ii) the buckling response concentrates only on a part of the bending reversal portion 11C. Therefore, it is possible to prevent (iii) buckling of the curved reversal portion 11C.

Therefore, in the accumulator bladder 10 according to the present invention, even if the central portion 11A frequently repeats approaching and separating from the liquid inlet / outlet member 24 due to the fluctuation of the liquid pressure of the liquid supply source, the elastic material Since the annular members 14A and 14B are arranged corresponding to the inner inflection point R _I and the outer inflection point R _O with respect to the inner peripheral surface of the curved reversal portion 11C of the layer 11, the curved reversal portion 11C is formed. It is possible to avoid the buckling stress from concentrating on a part of the area, and to suppress the occurrence of buckling in the bending reflex portion 11C.

In other words, the accumulator bladder 10 according to the present invention can cope with the fluctuation of the liquid pressure of the liquid supply source (not shown) even when it is formed of the resin material having small elasticity, and by extension, Good durability characteristics can be secured for a long period of time, and as a result, the service life can be extended.

(Second Embodiment)

The configuration and operation of the second embodiment of the accumulator bladder according to the present invention will be described in detail with reference to FIG.

In the second embodiment, the annular members 14A and 14B are arranged corresponding to the inner inflection point R _I and the outer inflection point R _O with respect to the outer peripheral surface of the bending reversal portion 11C, respectively. Except for the above, the structure is substantially the same as that of the first embodiment.

Therefore, the second embodiment has substantially the same effects as the first embodiment.

Here, for the sake of simplicity of description, the same reference numerals are given to the members corresponding to the members included in the first embodiment, and the other description will be omitted.

(Third Embodiment)

Further, referring to FIG. 4, the configuration and operation of the third embodiment of the accumulator bladder according to the present invention will be described in detail.

In the third embodiment, the annular member 14A is arranged corresponding to the inner inflection point R _I with respect to the inner peripheral surface of the curved reversal portion 11C, and the annular member 14B is the outer peripheral surface of the curved reversal portion 11C. On the other hand, it has substantially the same configuration as that of the first embodiment except that it is arranged corresponding to the outer side inflection point R _O.

Therefore, the third embodiment has substantially the same effects as the first embodiment.

Here, for the sake of simplicity of description, the same reference numerals are given to the members corresponding to the members included in the first embodiment, and the other description will be omitted.

(Fourth Embodiment)

Furthermore, referring to FIG. 5, the structure and operation of the fourth embodiment of the accumulator bladder according to the present invention will be described in detail.

In the fourth embodiment, the annular member 14A is arranged corresponding to the inner side inflection point R _I with respect to the outer peripheral surface of the curved reversing portion 11C, and the annular member 14B is arranged on the inner peripheral surface of the curved reversing portion 11C. On the other hand, it has substantially the same configuration as that of the first embodiment except that it is arranged corresponding to the outer side inflection point R _O.

Therefore, the fourth embodiment has substantially the same effects as the first embodiment.

Here, for the sake of brevity of description, the same reference numerals are given to the members corresponding to the members included in the first embodiment, and the other description will be omitted.

(Fifth Embodiment)

In addition, with reference to FIG. 6, the configuration and operation of the fifth embodiment of the accumulator bladder according to the present invention will be described in detail.

The fifth embodiment is the same as the first embodiment except that only the annular member 14A is arranged corresponding to the inner inflection point R _I with respect to the inner peripheral surface of the curved reversal portion 11C. They have substantially the same structure.

Therefore, the fifth embodiment has substantially the same effects as the first embodiment.

Here, for the sake of brevity of description, the same reference numerals are given to the members corresponding to the members included in the first embodiment, and the other description will be omitted.

(Sixth Embodiment)

In addition, with reference to FIG. 7, the structure and operation of the sixth embodiment of the accumulator bladder according to the present invention will be described in detail.

The sixth embodiment is substantially the same as the first embodiment except that only the annular member 14A is arranged corresponding to the inner side inflection point R _I with respect to the outer peripheral surface of the bending reversal portion 11C. Have the same structure.

Therefore, the sixth embodiment has substantially the same effects as the first embodiment.

Here, for the sake of brevity of description, the same reference numerals are given to the members corresponding to the members included in the first embodiment, and the other description will be omitted.

(Seventh Embodiment)

In addition, referring to FIG. 8, the configuration and operation of the seventh embodiment of the accumulator bladder according to the present invention will be described in detail.

The seventh embodiment is the same as the first embodiment except that only the annular member 14B is arranged corresponding to the outer inflection point R _O with respect to the inner peripheral surface of the curved reversal portion 11C. They have substantially the same structure.

Therefore, the seventh embodiment has substantially the same effects as the first embodiment.

Here, for the sake of simplicity of description, the same reference numerals are given to the members corresponding to the members included in the first embodiment, and the other description will be omitted.

(Eighth Embodiment)

In addition, with reference to FIG. 9 as well, the configuration and operation of the eighth embodiment of the accumulator bladder according to the present invention will be described in detail.

The eighth embodiment is substantially the same as the first embodiment except that only the annular member 14B is arranged corresponding to the outer side inflection point R _O with respect to the outer peripheral surface of the bending reversal portion 11C. Have the same structure.

Therefore, the eighth embodiment has substantially the same effects as the first embodiment.

Here, for the purpose of simplifying the description, the same reference numerals are given to the members corresponding to the members included in the first embodiment, and the other description will be omitted.

(Ninth Embodiment)

Further, with reference to FIG. 10, the configuration and operation of the ninth embodiment of the accumulator bladder according to the present invention will be described in detail.

In the ninth embodiment, the annular members 14A and 14B are arranged inside the curved reversal portion 11C so as to correspond to the inner inflection point R _I and the outer inflection point R _O , respectively, and the gas shielding layer is provided. It has substantially the same construction as the first embodiment except that 12 is removed.

Therefore, the ninth embodiment has substantially the same effects as the first embodiment.

Here, for the sake of simplicity of description, the same reference numerals are given to the members corresponding to the members included in the first embodiment, and the other description will be omitted.

(Tenth Example)

Finally, with reference to FIG. 11, the structure and operation of the tenth embodiment of the accumulator bladder according to the present invention will be described in detail.

In the tenth embodiment, except that only the annular member 14A is disposed inside the curved reversal portion 11C corresponding to the inner inflection point R _I , and the gas shielding layer 12 is removed. The configuration is substantially the same as that of the first embodiment.

Therefore, the tenth embodiment has substantially the same effects as the first embodiment.

Here, for the purpose of simplifying the description, the same reference numerals are given to the members corresponding to the members included in the first embodiment, and the other description will be omitted.

(Eleventh Embodiment)

Finally, with reference to FIG. 12, the structure and operation of the eleventh embodiment of the accumulator bladder according to the present invention will be described in detail.

The eleventh embodiment is different from the eleventh embodiment except that only the annular member 14B is arranged corresponding to the outside inflection point R _O with respect to the inside of the inversion portion 11C, and the gas shielding layer 12 is removed. , And has substantially the same configuration as that of the first embodiment.

Therefore, the eleventh embodiment has substantially the same effects as the first embodiment.

Here, for the purpose of simplifying the description, the same reference numerals are given to the members corresponding to the members included in the first embodiment, and the other description will be omitted.

(Modification)

In the above description, at least one of the inner inflection point R _I and the outer inflection point R _O is associated with one of the inner peripheral surface and the outer peripheral surface of the curved inversion portion 11C of the elastic material layer 11. Although only the case of disposing the annular members 14A and 14B has been described, the present invention is not limited to this, and the inner side deformation is performed with respect to both the inner peripheral surface and the outer peripheral surface of the bending reversal portion of the elastic material layer. This is also included when the annular member is arranged corresponding to at least one of the inflection point and the outside inflection point.

[0102]

[Effect of the device]

 As is apparent from the above, the accumulator bladder according to the present invention is formed on the inner peripheral surface of the elastic material layer so that the outer peripheral surface of the elastic material layer abuts on the inner peripheral surface of the shell of the accumulator. A bladder for an accumulator in which an elastic mounting portion is pressed by a mounting member, and is configured as disclosed in the section of [Solution to Problem], and particularly for a bending reversal portion of the elastic material layer. Since the annular member is arranged corresponding to at least one of the inner inflection point and the outer inflection point, (i) it has the effect of avoiding the concentration of buckling stress on a part of the bending reversal part. This has the effect of (ii) suppressing the occurrence of buckling at the bending reversal portion, and (iii) ensuring durability even when formed of a resin material with low elasticity. Effect that can extend the life Having.

[Brief description of drawings]

FIG. 1 is a first bladder for accumulator according to the present invention.
FIG. 6 is a cross-sectional view showing an example of the above.

FIG. 2 is a cross-sectional view showing a usage state of the embodiment shown in FIG.

FIG. 3 is a second accumulator bladder according to the present invention.
FIG. 6 is a cross-sectional view showing an example of the above.

FIG. 4 is a third accumulator bladder according to the present invention.
FIG. 6 is a cross-sectional view showing an example of the above.

FIG. 5: Fourth bladder for accumulator according to the present invention
FIG. 6 is a cross-sectional view showing an example of the above.

FIG. 6 is a fifth bladder for accumulator according to the present invention.
FIG. 6 is a cross-sectional view showing an example of the above.

FIG. 7 is a sixth bladder for accumulator according to the present invention.
FIG. 6 is a cross-sectional view showing an example of the above.

FIG. 8 is a seventh bladder for accumulator according to the present invention.
FIG. 6 is a cross-sectional view showing an example of the above.

FIG. 9 is an eighth accumulator bladder according to the present invention.
FIG. 6 is a cross-sectional view showing an example of the above.

FIG. 10 is a sectional view showing a ninth embodiment of the accumulator bladder according to the present invention.

FIG. 11 is a sectional view showing a tenth embodiment of the accumulator bladder according to the present invention.

FIG. 12 is a sectional view showing an eleventh embodiment of the accumulator bladder according to the present invention.

[Explanation of Codes] 10・ ・ ・ ・ Bladder for accumulator 11 ・ ・ ・ ・ ・ ・ Elastic material Layer 11A ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Central part 11B ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Edge part 11C ・ ・ ・ ・ ・ ・ ・ ・ ・Curvature inversion part R _I ··········· Inside inflection point R _O ·······・ ・ ・ ・ Elastic mounting part 11b ・ ・ ・ ・ ・ ・ ・ ・ ・ Elastic protrusion 12 ・ ・ ・ Gas shielding layer 13 ・ ・・ ・ ・ Poppet 14A, 14B ・ ・ ・ ・ ・ ・ ・ ・ ・ Annular member 20・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ ・ ・ Accumulator 21 ・ ・ ・ ・ ・ ・ Shell 21A ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Gas Chamber 21B ・ ・ ・ ・ ・ ・ ・ ・ ・ Liquid chamber 22 ・ ・ ・ ・ ・ ・ ・ Mounting member 23 ・ ・ ・ ・ ・ ・・ ・ ・ ・ ・ ・ ・ ・ Closing member 23a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Gas supply port 23b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Seal member 24 ・ ・ ・ ・・ ・ ・ ・ ・ ・ ・ ・ ・ Liquid inlet / outlet member 24a ・ ・ ・ ・ ・ ・ ・ ・ ・ Liquid guide hole 24b ・ ・ ・ ・ ・ ・Screw part

Claims (1)

[Scope of utility model registration request] 1. An accumulator formed by pressing an elastic mounting portion formed on an inner peripheral surface of a peripheral portion of an elastic material layer by a mounting member so that an outer peripheral surface of the peripheral portion of the elastic material layer is brought into contact with an inner peripheral surface of a shell of the accumulator. In the bladder for a vehicle, an annular member (14A, 14B) is provided corresponding to at least one of the inner side inflection point R _I and the outer side inflection point R _O with respect to the curved inversion portion (11C) of the elastic material layer. A bladder for accumulator, which is characterized by