JP6926796B2 - tank - Google Patents

Description

The present invention relates to a tank.

As a tank for high-pressure fluid, a configuration including a liner which is a base material of the tank and a fiber reinforced resin layer formed on the outer peripheral surface of the liner is known. The fiber-reinforced resin layer is formed by winding a number of layers of reinforcing fibers impregnated with a thermosetting resin in advance around the outer periphery of the liner. In Patent Document 1, the winding end (end) of the reinforcing fiber wound around the outer circumference of the liner is pressed against the surface of the fiber layer and heated by a heater to cure the thermosetting resin and fix the winding end of the reinforcing fiber. The technology to do is disclosed.

Japanese Unexamined Patent Publication No. 2013-063584

The viscosity of the thermosetting resin is once lowered and the fluidity is increased after heating and before the thermosetting. Therefore, the thermosetting resin having high fluidity on the inner layer side of the fiber layer exudes to the outer layer side due to the tension applied to the reinforcing fibers. At this time, when the reinforcing fibers are wound around the liner, the contained gas (gas) moves toward the surface, and the surface of the fiber layer becomes uneven. In the technique described in Patent Document 1, since the winding end of the reinforcing fiber is locally heated, a convex portion is formed at the winding end portion to impair the smoothness of the surface of the fiber layer, and the convex portion is caused by repeated vibration. May crack and damage the fiber layer.

Here, on the outer surface of the fiber layer, the portion in contact with the tank band holding the tank (hereinafter referred to as "tank band portion") has a smooth surface of the fiber layer in order to firmly fix the tank. Desired. In addition, the portion where the label on which the manufacturing information of the tank is written (hereinafter referred to as "label portion") is the surface of the fiber layer in order to suppress the deterioration of the visibility of the label from the outside of the tank. Smoothness is required. Such a problem is also common to tanks using reinforcing fibers impregnated with an ultraviolet curable resin. It is also common not only in tanks for high-pressure fluids but also in tanks used for any other purpose. Therefore, there is a demand for a technique capable of suppressing damage to the fiber layer due to fixing of the winding end of the carbon fiber while suppressing a decrease in smoothness of the tank band portion or the label portion.

The present invention has been made to solve the above-mentioned problems, and can be realized as the following forms.
[Form 1] Of the tank, the liner which is the base material of the tank, the reinforcing layer made of carbon fiber impregnated with the curable resin wound around the outer peripheral surface of the liner, and the outer peripheral surface of the reinforcing layer. The carbon fiber is wound with a film arranged at the end of the carbon fiber winding and a protective layer made of a reinforcing layer and a glass fiber impregnated with a curable resin wound around the outer peripheral surface of the film. The end portion and the film are formed of, on the outer surface of the protective layer, a tank band portion in contact with the tank band holding the tank and a label portion on which a label for displaying manufacturing information of the tank is arranged. A tank that is placed only in one of the positions.

(1) According to one embodiment of the present invention, a tank is provided. This tank includes a liner which is a base material of the tank; a reinforcing layer made of carbon fiber impregnated with a curable resin wound around the outer peripheral surface of the liner; and of the outer peripheral surface of the reinforcing layer, the carbon fiber. The film is provided at the winding end portion; and the reinforcing layer and the protective layer made of glass fiber impregnated with the curable resin wound around the outer peripheral surface of the film; Is one of a tank band portion in contact with the tank band holding the tank and a label portion on which a label for displaying manufacturing information of the tank is arranged on the outer surface of the protective layer. Placed in position.

According to this form of tank, the carbon fiber winding end portion and the film are arranged at either the tank band portion or the label portion on the outer surface of the protective layer, so that the liner The winding end portion of the carbon fiber wound around the outer peripheral surface can be fixed to the outer surface of the reinforcing layer by a film. Therefore, as compared with the configuration in which the winding end portion of the carbon fiber is locally heated and fixed, it is possible to suppress the formation of a convex portion on the outer surface of the winding end portion, which accompanies the fixing of the winding end portion of the carbon fiber. Damage to the fiber layer can be suppressed. In addition, since the film is arranged at either position of the tank band portion and the label portion, when the liner is treated for resin curing (for example, when heated or irradiated with ultraviolet rays). It is possible to prevent the formation of a convex portion on the outer surface of the fiber layer at any position of the tank band portion and the label portion due to the resin and gas moving from the inside to the outer surface of the reinforcing layer. Therefore, it is possible to suppress a decrease in the smoothness of the tank band portion or the label portion. In addition, since the winding end portion is arranged at either position of the tank band portion and the label portion, compared with the configuration in which the winding end portion is arranged at a position different from that of both the tank band portion and the label portion. Therefore, the amount of film to be arranged can be suppressed. Therefore, the manufacturing cost of the tank can be reduced, the time required for the process of winding the film can be reduced, and the weight of the tank can be reduced.

The present invention can also be realized in various forms. For example, it can be realized in the form of a tank manufacturing method, a manufacturing apparatus, or the like, as well as a tank inspection method.

It is sectional drawing which shows the schematic structure of the tank as one Embodiment of this invention. It is sectional drawing which shows the structure of the fiber reinforced resin layer in the region shown in FIG. 1 enlarged and schematically. It is a process drawing which shows the manufacturing method of the tank in this embodiment. It is a process drawing which shows the detailed procedure of a fiber winding process. It is explanatory drawing which shows typically the state of the fiber reinforced resin layer in a thermosetting process. It is explanatory drawing which shows typically the fiber-reinforced resin layer of the comparative example.

A. Embodiment:
A1. Tank configuration:
FIG. 1 is a cross-sectional view showing a schematic configuration of a tank as an embodiment of the present invention. The tank 100 has a structure in which a fiber reinforced resin layer 40 is formed on the outer surface of a liner 20 which is a base material of the tank 100. The tank 100 is used in a fuel cell system to store hydrogen gas as a fuel gas. In the present embodiment, the fuel cell system including the tank 100 is mounted on a vehicle and used as a power source (power source) for a drive motor. FIG. 1 shows a cross section of the tank 100 along the central axis CX.

The tank 100 includes two base portions 30 and a label LB in addition to the liner 20 and the fiber reinforced resin layer 40 described above. The liner 20 is a resin container having a high gas barrier property. The liner 20 is made of, for example, a resin such as polyamide, ethylene vinyl alcohol copolymer, or polyethylene. Instead of the resin, it may be formed of a metal such as an aluminum alloy. The liner 20 has a substantially cylindrical body portion 21 and two convex curved surface-shaped dome portions 22 arranged so as to sandwich the body portion 21. In FIG. 1, the central axis CX of the tank 100 represents the central axis of the body portion 21. The longitudinal direction of the tank 100 is a direction along the central axis CX.

The two base portions 30 are attached to the apex portions of the dome portions 22, respectively. As shown in FIG. 1, the base portions 30 are attached to both ends of the liner 20 in the longitudinal direction. The base portion 30 is attached so that the central axis of the base portion 30 and the central axis CX of the liner 20 coincide with each other. One base portion 30 communicates with the inside of the liner 20, and a pipe for supplying hydrogen gas is connected to the base portion 30.

The fiber-reinforced resin layer 40 has a structure in which a plurality of layers composed of fiber bundles wound in multiple layers so as to cover the outer surface of the liner 20 are laminated. The fiber reinforced resin layer 40 has pressure resistance and is used to increase the strength of the liner 20. The fiber reinforced resin layer 40 includes a reinforcing layer 42 and a protective layer 44.

The reinforcing layer 42 is formed so as to cover the entire outer peripheral surface of the liner 20 and a part of the two base portions 30. The reinforcing layer 42 is made of carbon fiber reinforced resin (CFRP: Carbon Fiber Reinforced Plastics) in which carbon fibers are impregnated with a thermosetting resin in advance. In this embodiment, polyacrylonitrile (PAN) -based carbon fiber is used as the carbon fiber. Instead of the polyacrylonitrile (PAN) -based carbon fiber, any other carbon fiber such as rayon-based carbon fiber or pitch-based carbon fiber may be used, and glass fiber or glass fiber may be used for the purpose of reinforcing the carbon fiber. It may contain aramid fibers. Further, an epoxy resin is used as the thermosetting resin impregnated in the carbon fiber. Instead of the epoxy resin, any other thermosetting resin such as polyester resin or polyamide resin may be used. In the following description, the carbon fiber impregnated with the thermosetting resin is referred to as "resin-impregnated carbon fiber".

The protective layer 44 is formed on the reinforcing layer 42. In other words, the protective layer 44 is formed on the outer peripheral surface of the liner 20. The protective layer 44 is made of a glass fiber reinforced resin (GFRP: Glass Fiber Reinforced Plastics) in which glass fibers are pre-impregnated with a thermosetting resin. The protective layer 44 has higher impact resistance than the reinforcing layer 42. Epoxy resin is used as the thermosetting resin impregnated in the glass fiber. Instead of the epoxy resin, any other thermosetting resin such as a polyester resin or a polyamide resin may be used. In the following description, the glass fiber impregnated with the thermosetting resin is referred to as "resin-impregnated glass fiber".

The outer surface of the protective layer 44 has tank band portions 25a and 25b and a label portion 27. The tank band portions 25a and 25b are respectively arranged on the side of the body portion 21 near the dome portion 22, and are portions in the tank 100 where a tank band (not shown) is fixed. A tank band (not shown) contacts the outer surface of the protective layer 44 in the tank 100 and holds the tank 100 along the circumferential direction. For example, the tank 100 is housed in a center tunnel provided under the floor of the vehicle, and the tank 100 is held by a tank band (not shown) and fixed to the vehicle. The label portion 27 is arranged substantially in the center of the body portion 21, and is a portion where the label LB is arranged.

The label LB is a thin metal plate having a substantially rectangular shape in a plan view, and describes manufacturing information such as a manufacturing number of the tank 100 and a manufacturing history (manufacturing date and time, manufacturing factory, manufacturing line, etc.). The label LB is embedded in the protective layer 44 at the label portion 27 so that the surface on which the manufacturing information is described faces the outside of the tank 100. The label LB is embedded with the manufacturing information written on the label LB from the outside of the tank 100 to a visible depth. In the present embodiment, the "visible depth" is a depth of about 0.2 mm from the outer surface of the protective layer 44. It is preferable that the embedding depth of the label LB is about 0.1 mm to 1.25 mm from the outer surface of the protective layer 44 because it is easy to see from the outside of the tank 100. As described above, since the epoxy resin and the glass fiber forming the protective layer 44 are substantially transparent, they can be visually recognized from the outside of the tank 100.

A2. Structure of fiber reinforced resin layer:
FIG. 2 is an enlarged cross-sectional view schematically showing the structure of the fiber reinforced resin layer 40 in the region Ar1 shown in FIG. The region Ar1 is a region including the tank band portion 25a in the tank 100. As described above, the fiber reinforced resin layer 40 has a structure in which the reinforcing layer 42 is sequentially laminated from the side near the surface of the liner 20 to the side far from the surface, and the protective layer 44 is laminated on the reinforcing layer 42. In the following description, the reinforcing layer 42 will be referred to as a first layer, a second layer, a third layer, ... Nth layer in order from the side closer to the liner 20 to the side farther from the liner 20. FIG. 2 schematically shows a portion including the first layer L1, the second layer L2, the third layer L3, the fourth layer L4, and the fifth layer L5. The fifth layer L5 is the outermost layer in the reinforcing layer 42. In FIG. 2, the X-axis is parallel to the central axis CX of the tank 100, and the Y-axis and the Z-axis are orthogonal to the X-axis and orthogonal to each other. In FIG. 2, the cross section of the fiber forming each fiber layer is shown in a substantially perfect circular shape in the + X direction of each fiber layer.

The first layer L1 is formed on the outer peripheral surface of the liner 20 so that the fiber cross sections of a large number of circumferences are lined up substantially parallel to the X axis on the outer peripheral surface of the liner 20. The second layer L2 is arranged on the upper side (+ Z direction side) of the first layer L1 in contact with the first layer L1. Similar to the first layer L1, the second layer L2 is also formed on the outer peripheral surface of the first layer L1 so that the fiber cross sections for a large number of circumferences are lined up substantially parallel to the X axis. Similar to the second layer L2, the third layer L3 to the fifth layer L5 are also formed on the outer peripheral surface of the fiber layer adjacent to the inside so that the fiber cross sections for a large number of circumferences are lined up substantially parallel to the X axis. .. The winding end (end) portion L5e (hereinafter, referred to as “winding end portion L5e”) of the resin-impregnated carbon fiber of the fifth layer L5 is arranged in the tank band portion 25a. In other words, the reinforcing layer 42 is formed by winding resin-impregnated carbon fiber so that the winding end portion L5e is arranged on the tank band portion 25a.

As shown in FIG. 2, the film 43 is arranged on the tank band portion 25a in the fifth layer L5. The film 43 is used to fix the winding end portion L5e of the reinforcing layer 42. The film 43 is wound around the outer peripheral surface of the tank band portion 25a so as to cover the winding end portion L5e from above.

The film 43 does not melt at the curing temperature of the thermosetting resin impregnated in the carbon fiber and the glass fiber, and does not allow the resin and the gas contained in the resin to permeate. In this embodiment, the film 43 is a thin plate made of aluminum. As described above, in the present embodiment, since the epoxy resin is used as the thermosetting resin impregnated in the carbon fiber and the glass fiber, the curing temperature is, for example, 150 ° C. The film 43 may be a thin plate made of stainless steel instead of aluminum, may be a metal foil such as aluminum or stainless steel, or may be a heat-shrinkable tube, polytetrafluoroethylene, polyamide, or the like. It may be a resin member. As the heat-shrinkable tube, various resin-made heat-shrinkable members such as polyolefin, fluoropolymer, and thermoplastic elastomer can be adopted.

As shown in FIG. 2, the protective layer 44 is formed on the outer peripheral surfaces of the fifth layer L5 and the film 43 so that the fiber cross sections of a large number of circumferences are arranged substantially parallel to the X axis.

A3. How to make a tank:
FIG. 3 is a process diagram showing a method for manufacturing a tank according to the present embodiment. In this embodiment, the tank 100 is manufactured by the filament winding method (FW method). As shown in FIG. 3, the preparation step is first executed (step P105). In the preparation step, materials necessary for manufacturing the tank 100, such as the liner 20, resin-impregnated carbon fiber, and resin-impregnated glass fiber, are prepared and attached to a filament winding device (hereinafter, referred to as “FW device”) (hereinafter referred to as “FW device”) (not shown). When the preparatory step (step P105) is completed, the fiber winding step is executed (step P110).

FIG. 4 is a process diagram showing a detailed procedure of the fiber winding process (process P110). When the fiber winding step is executed, the FW apparatus winds the resin-impregnated carbon fiber around the outer peripheral surface of the liner 20 to form the reinforcing layer 42 (step P201). Specifically, the FW device is started, the liner 20 rotates about the central axis CX as a rotation axis, and the resin-impregnated carbon fibers are fed out from a bobbin (not shown) and wound around the outer peripheral surface of the liner 20. At this time, winding for a predetermined number of layers is executed by hoop winding, helical winding, or the like.

When the step P201 is completed, the FW apparatus arranges the winding end portion L5e of the resin-impregnated carbon fiber on the tank band portion 25a (step P202). Specifically, the resin-impregnated carbon fiber is wound so that the position of the winding end portion L5e of the resin-impregnated carbon fiber is arranged in the tank band portion 25a. After that, the resin-impregnated carbon fiber is cut.

When the step P202 is completed, the film 43 is wound around the outer peripheral surfaces of the tank band portions 25a and 25b and the label portion 27 (step P203). Specifically, the film 43 is wound around the tank band portions 25a and 25b and the label portion 27 in the reinforcing layer 42 formed in step P201. At this time, since the winding end portion L5e of the resin-impregnated carbon fiber is arranged on the tank band portion 25a, the film 43 is wound around the outer peripheral surface of the tank band portion 25a, so that the winding end portion L5e is crimped to the liner 20. NS. The step P203 may be performed manually by an operator or may be performed by a dedicated winding device.

When the step P203 is completed, the FW apparatus winds the resin-impregnated glass fiber around the outer peripheral surfaces of the reinforcing layer 42 and the film 43 to form the protective layer 44 (step P204). Specifically, the resin-impregnated glass fiber is wound around the outer peripheral surface of the outermost layer of the liner 20 after the completion of step P203. By controlling the FW device in the same manner as in step P201 described above, winding of resin-impregnated glass fibers for a predetermined number of layers is executed.

In step P204, the label LB is embedded in the protective layer 44. Specifically, when the resin-impregnated glass fiber is wound by a predetermined number of turns, the winding operation by the FW device is stopped, and the label LB is arranged on the label portion 27 on the outer surface of the protective layer 44. After that, the winding operation by the FW device is restarted, the resin-impregnated glass fiber is wound on the label LB, and the label LB is embedded in the protective layer 44.

When the step P204 is completed, the winding end portion of the resin-impregnated glass fiber is fixed (step P205). Specifically, the winding end portion of the resin-impregnated glass fiber is cut, and the winding end portion of the resin-impregnated glass fiber is fixed to the protective layer 44 by needle insertion, thermal pressure bonding, or the like. When the step P205 is completed, the fiber winding step (step P110) is completed.

As shown in FIG. 3, when the fiber winding step (step P110) is completed, the thermosetting step is executed (step P115). In the thermosetting step, the entire liner 20 is heated. As a result, the thermosetting resin contained in the carbon fiber and the glass fiber wound around the outer peripheral surface of the liner 20 is cured, and the fiber reinforced resin layer 40 covering the outer surface of the liner 20 is formed. In this way, the tank 100 having the fiber reinforced resin layer 40 is obtained.

FIG. 5 is an explanatory view schematically showing the state of the fiber reinforced resin layer 40 in the thermosetting step (step P115). FIG. 5 shows the region Ar1 shown in FIG. Further, FIG. 5 shows the state of the fiber reinforced resin layer 40 after the liner 20 is heated and before the thermosetting resin is cured in the thermosetting step. As shown by a substantially perfect circle in the reinforcing layer 42, the thermosetting resin impregnated in the carbon fibers and the gas contained when the resin-impregnated carbon fibers are wound are from the inner layer side (liner 20 side) of the reinforcing layer 42 to the outer layer. It moves toward the side (protective layer 44 side). The resin and gas reach the boundary between the reinforcing layer 42 and the protective layer 44 at the portion where the film 43 is not arranged (the left side and the right side of the reinforcing layer 42), and further move to the inside of the protective layer 44.

On the other hand, in the portion where the film 43 is arranged, that is, the portion corresponding to the tank band portion 25a, the reinforcing layer 42 and the protective layer 44 are formed because the film 43 has a property of not allowing the resin and gas to permeate. The movement of the resin and gas that have reached the boundary between the two to the protective layer 44 is suppressed. A part of the resin and the gas that cannot move toward the protective layer 44 due to the presence of the film 43 moves toward the portion where the film 43 is not arranged. Therefore, these resins and gases will move to the inside of the protective layer 44 after reaching the boundary between the reinforcing layer 42 and the protective layer 44. Therefore, the surface of the protective layer 44 may be uneven in the portion where the film 43 is not arranged, but the surface of the protective layer 44 is not uneven in the portion where the film 43 is arranged, and the outer surface is not uneven. Smoothness is maintained.

FIG. 6 is an explanatory view schematically showing the fiber reinforced resin layer 70 of the comparative example. FIG. 6 schematically shows the fiber reinforced resin layer 70 in the thermosetting step (step P115), as in FIG. In the fiber reinforced resin layer 70 of the comparative example, the film 43 is not arranged between the reinforcing layer 72 and the protective layer 74, and the winding end portion of the reinforcing layer 72 is fixed to the liner 20 by thermal pressure bonding. Similar to the reinforcing layer 42 shown in FIG. 5, in the reinforcing layer 72 shown in FIG. 6, the thermosetting resin impregnated in the carbon fibers and the gas contained when the resin-impregnated carbon fibers are wound are shown by substantially perfect circles. As described above, the reinforcing layer 72 moves from the inner layer side (liner 20 side) to the outer layer side (protective layer 74 side). Further, the resin and the gas move from the reinforcing layer 72 toward the protective layer 74 along the entire X-axis of the reinforcing layer 72, and the surface of the protective layer 74 becomes uneven, so that the surface of the protective layer 74 becomes uneven. The smoothness of the is impaired.

In such a state, when the tank band is attached to the outer surface of the protective layer 74 and the tank 100 is attached to the vehicle, the resin of the convex portion is cracked by the vibration repeatedly generated as the vehicle is operated, and the tank band The fastening force may decrease. Therefore, there arises a problem that the tank band cannot be firmly fixed. Further, when a convex portion is formed on the label portion by the resin exuded from the reinforcing layer 72, the resin layer becomes thick because the inside of the convex portion is filled with the resin, and the permeability of the protective layer 74 decreases. There is a risk of doing so. Further, when a convex portion is formed on the label portion due to the movement of the gas contained in the resin, the surface of the protective layer 74 may become turbid and the permeability of the protective layer 74 may decrease. Therefore, there arises a problem that it is difficult to visually recognize the information displayed on the label LB.

On the other hand, in the fiber reinforced resin layer 40 of the present embodiment, since the winding end portion L5e of the reinforcing layer 42 is arranged in the tank band portion 25a and the film 43 is arranged in the tank band portion 25a, needle insertion and heat are provided. The winding end portion L5e of the resin-impregnated carbon fiber can be fixed to the liner 20 without fixing the winding end portion L5e by crimping or the like. Therefore, as compared with the configuration in which the winding end portion L5e is locally heated and fixed, it is possible to suppress the formation of a convex portion on the outer surface of the winding end portion L5e, and the winding end portion L5e of the resin-impregnated carbon fiber can be fixed. Damage to the fiber reinforced resin layer 40 due to the above can be suppressed.

In addition, the film 43 is arranged in the tank band portions 25a and 25b and the label portion 27, does not melt at the curing temperature of the thermosetting resin impregnated in the carbon fiber and the glass fiber, and is included in the resin and the resin. Since it does not permeate the obtained gas, it is possible to prevent the resin and gas exuding from the reinforcing layer 42 when the thermosetting resin is cured from moving from the film 43 to the protective layer 44. Therefore, in the tank band portions 25a and 25b and the label portion 27 where the film 43 is arranged, it is possible to reduce the occurrence of irregularities on the outer surface of the fiber reinforced resin layer 40, and the tank band portions 25a and 25b and the label portion can be reduced. The outer surface of 27 can be smoothed. Therefore, after the tank 100 is fixed to the vehicle by the tank band, it is possible to suppress a decrease in the fastening force of the tank band due to vibration repeatedly generated as the vehicle is operated, and the tank band can be firmly fixed. Further, since the smoothness of the label portion 27 is maintained, it is possible to suppress the decrease in the transparency of the protective layer 44 in the label portion 27, and it is difficult to visually recognize the information displayed on the label LB from the outside of the tank 100. The occurrence of problems can be suppressed.

Further, since the resin-impregnated carbon fiber winding end portion L5e is arranged in the tank band portion 25a where the film 43 is arranged, the film for obtaining the smoothness of the outer surface of the fiber-reinforced resin layer 40 and the resin-impregnated carbon fiber winding The film for fixing the end portion L5e can be a single film. Therefore, the manufacturing cost of the tank 100 can be reduced, the time required for the process of winding the film 43 can be reduced, and the weight of the tank 100 can be reduced.

In addition, since the film 43 is arranged on the outer surface of the tank 100 where smoothness is required, such as the tank band portions 25a and 25b and the label portion 27, the entire outer surface of the tank 100 is covered with the film 43. As compared with It is possible to suppress the occurrence of unevenness in the portion where the 43 is arranged.

B. Other embodiments:
B1. Other Embodiment 1:
In the above embodiment, the curable resin to be impregnated with the carbon fiber and the glass fiber is a thermosetting resin, but the present invention is not limited thereto. Instead of the thermosetting resin, an ultraviolet curable resin may be impregnated. In that case, the resin may be cured by irradiating ultraviolet rays in the thermosetting step (step P115). Even in such a configuration, the same effect as that of the above-described embodiment is obtained.

B2. Other Embodiment 2:
In the above embodiment, the thermosetting step (step P115) is performed after the reinforcing layer 42 and the protective layer 44 are formed, but the present invention is not limited thereto. For example, the thermosetting step may be executed after the reinforcing layer 42 is formed, and the thermosetting step may be further executed after the protective layer 44 is formed. Further, for example, the reinforcing layer 42 and the protective layer 44 may be formed by different FW devices. Even in such a configuration, the same effect as that of the above-described embodiment can be obtained.

B3. Other Embodiment 3:
In the above embodiment, the winding end portion L5e of the carbon fiber is arranged in the tank band portion 25a, but the present invention is not limited to this. For example, the winding end portion L5e of the carbon fiber may be arranged in the tank band portion 25b. Further, for example, the winding end portion L5e of the carbon fiber may be arranged on the label portion 27. Further, the arrangement of the film 43 may be omitted at a position where the winding end portion L5e of the carbon fiber is not arranged. For example, in the above embodiment, the film 43 may be arranged only on the tank band portion 25a, and the film 43 may not be arranged on the tank band portion 25b and the label portion 27. That is, in general, if the winding end portion L5e of the carbon fiber and the film 43 are arranged at the same positions, the same effect as that of the above embodiment can be obtained.

B4. Other Embodiment 4:
In the above embodiment, when the carbon fiber and the glass fiber are impregnated with a resin that does not melt at the curing temperature of the epoxy resin of 150 ° C. and softens at a temperature higher than 150 ° C., the film 43 is 150 ° C. or lower. Then, the resin and gas exuded from the reinforcing layer 42 can be suppressed from moving to the protective layer 44, and at a temperature higher than 150 ° C., the resin impregnated in the fibers softens to the outside of the fiber reinforced resin layer 40. It is possible to suppress the formation of convex portions on the surface and further smooth the outer surface of the fiber reinforced resin layer 40.

B5. Other Embodiment 5:
In the above embodiment, the liner 20 is a liner for a tank for storing a high-pressure fluid, but the present invention is not limited thereto. The liner is not limited to the tank for high-pressure fluid storage, and may be a liner for a tank used for any other purpose. Even in such a configuration, the same effect as that of the above-described embodiment can be obtained.

The present invention is not limited to the above-described embodiments and modifications, and can be realized with various configurations without departing from the spirit of the present invention. For example, the embodiments corresponding to the technical features in each of the embodiments described in the column of the outline of the invention, the technical features in the modified examples are used to solve some or all of the above-mentioned problems, or the above-mentioned above. It is possible to replace or combine them as appropriate to achieve some or all of the effects. Further, if the technical feature is not described as essential in the present specification, it can be deleted as appropriate.

20 ... Liner 21 ... Body part 22 ... Dome part 25a, 25b ... Tank band part 27 ... Label part 30 ... Base part 40, 70 ... Fiber reinforced resin layer 42, 72 ... Reinforcing layer 43 ... Film 44, 74 ... Protective layer 100 ... Tank Ar1 ... Area CX ... Central axis L1 ... 1st layer L2 ... 2nd layer L3 ... 3rd layer L4 ... 4th layer L5 ... 5th layer L5e ... Wind end LB ... Label

Claims (1)

It ’s a tank
The liner, which is the base material of the tank,
A reinforcing layer made of carbon fiber impregnated with a curable resin wound around the outer peripheral surface of the liner, and
Of the outer peripheral surface of the reinforcing layer, the film arranged at the winding end portion of the carbon fiber and
A protective layer made of glass fibers impregnated with a curable resin wound around the reinforcing layer and the outer peripheral surface of the film, and a protective layer.
With
The carbon fiber winding end and the film are
Only one of the outer surface of the protective layer, the tank band portion in contact with the tank band holding the tank and the label portion on which the label for displaying the manufacturing information of the tank is arranged. Placed in,
tank.

Images