Tank

Abstract

Tank (11) which has: an inlet (132) provided on one side of a vehicle to introduce a liquid from the outside into a tank chamber (230) in which the liquid is stored; a communication path (231) designed to extend from the inlet (132) towards the other side of the vehicle; and a communication opening (232) capable of establishing communication between the communication path (231) and the tank chamber (230), wherein a surface section (222) which is constructed such that its height increases from one side of the vehicle to the communication opening (232) on the other side of the vehicle, in a state in which the tank chamber (230) is mounted in the vehicle, is formed on an upper section of the tank chamber (230), and wherein a roof part (130) is formed on the upper section of the tank chamber (230) and the surface part (222) is formed at a position which is recessed downwards relative to the roof part (130).

Description

Technical field

[0001] The present invention relates to a tank intended for a vehicle for storing a liquid. background

[0002] A tank is known which is intended for a vehicle for the storage of a liquid (see, for example, JP H09 - 86 389 A).

[0003] US Patent 7,261,382 B2 describes a tank with an inlet designed to introduce a liquid into a tank chamber. It also describes a connection between the inlet and another side of the vehicle, as well as a connecting port for linking this port to the tank chamber. Finally, the tank has a surface section designed to increase in height from one side of the vehicle to the connecting port on the other side when the tank chamber is installed in the vehicle. A similar tank is described in JP 2004-338,436 A. Summary of the invention: Technical problem

[0004] There is a need for a tank that allows for the satisfactory introduction of a liquid during maintenance work.

[0005] The present invention provides a tank that enables the satisfactory introduction of a liquid. Solution to the problem

[0006] According to a first aspect of the present invention, a tank is constructed such that an inlet for introducing or injecting a liquid from the outside into a tank chamber in which the liquid is stored is provided on one side of a vehicle; a communication path is provided, extending from the inlet towards the other side of the vehicle; and a communication opening is provided, enabling communication between the communication path and the tank chamber. A surface section, constructed such that its height increases from one side of the vehicle to the communication opening on the other side of the vehicle when the tank chamber is installed or mounted in the vehicle, is formed on an upper section of the tank chamber.

[0007] According to the first aspect of the present invention, a roof part is formed on the upper section of the tank chamber, wherein the surface part is formed at a position that is recessed downwards relative to the roof part.

[0008] According to a second aspect of the present invention, the tank further comprises: an upper structure on which the inlet is provided; and a lower structure on which the tank chamber is provided. The upper structure and the lower structure are attached to form a tank body. The flat portion is formed on the upper structure.

[0009] According to a third aspect of the present invention, the communication opening is configured on a rear side of the tank chamber in a forward / reverse direction of the vehicle. The surface area is inclined such that the height increases from a front to a rear side in the forward / reverse direction of the vehicle.

[0010] According to a fourth aspect of the present invention, an indicator line indicating the highest liquid level is formed in the tank at an upper position in a vertical direction relative to the surface area. Advantageous effects of the invention

[0011] The liquid can be introduced perfectly according to the tank described above. Brief description of the drawings Fig. Figure 1 is a side view showing a tank and a main cylinder according to a first embodiment. Fig. Figure 2 is a side view of a cross-section of a section representing the tank and the main cylinder, with the exception of a cap, according to the first embodiment. Fig. Figure 3 is a top view showing a tank body of the tank according to the first embodiment. Fig. 4 is a sectional view of cross-section AA of the Fig. 3. Fig. Figure 5 is a sectional view of cross-section BB of the Fig. 3. Fig. 6 is a sectional view of cross-section CC of the Fig. 3. Fig. Figure 7 is a top view showing a lower structure of the tank according to the first embodiment. Fig. Figure 8 is a view from below, showing an upper structure of the tank according to the first embodiment. Fig. Figure 9 is a sectional view, equivalent to the cross-section CC of the Fig. 3, of a tank according to a second embodiment. Fig. Figure 10 is a top view showing a tank body of the tank according to the second embodiment. Fig. 11 is a sectional view of the cross-section DD of the Fig. 10. Description of embodiments [First embodiment]

[0012] A tank according to a first embodiment is described based on the drawings. The tank 11 of the present embodiment is attached to a vehicle, such as a four-wheeled vehicle. As shown in Fig. As shown in Figure 1, the tank 11 is attached to a master cylinder 12 and mounted in a vehicle. A Fig. The position shown here is one in which the tank 11 and the master cylinder 12 are mounted in the vehicle. The tank 11 and the master cylinder 12 are mounted in the vehicle in such a way that the left side in Fig. 1 becomes the front when the vehicle is moving forward. The terms "front", "back", "left" and "right" in the following description correspond to front, back, left and right when the vehicle is moving forward.

[0013] The master cylinder 12 is a brake master cylinder that forms part of a braking system responsible for braking the wheels. A fluid is stored in the tank 11, which supplies the fluid to the master cylinder 12. The master cylinder 12 generates brake fluid pressure, which is introduced into the wheel cylinders (not shown) to generate a braking force in response to the driver applying the brakes. The master cylinder 12 of the present embodiment, although not shown, is a tandem master cylinder with two fluid pressure chambers, one at the rear and one at the front, to allow the generation of brake fluid pressure at brake lines of two systems.

[0014] The master cylinder 12 is mounted on the side of a vehicle body in a position where the body is inclined slightly upwards towards the front with respect to the horizontal. The master cylinder 12 is formed with a mounting attachment 14 on its upper front side and a mounting attachment 15 on its upper rear side. These mounting attachments 14 and 15 each have upper surfaces that are flush with each other and inclined slightly upwards towards the front with respect to the horizontal. As shown in Fig. As shown in Figure 2, the mounting part 14 has a mounting opening 16 formed at right angles to one of its upper surfaces. The mounting part 15 also has a mounting opening 17 formed at right angles to one of its upper surfaces. The tank 11 is attached by means of these mounting openings 16 and 17. In this assembled state, the interior of the tank 11 communicates with each of the fluid pressure chambers in the main cylinder 12.

[0015] Tank 11 has a tank body 18 made of a specific synthetic resin that is optically transparent and in the Fig. 1 to 6 is shown, and a cap 19, which is detachably attached to the tank body 18, is made of a synthetic resin and in Fig. Figure 1 shows the tank body 18 being constructed by joining an upper structure 20, which is an integrally formed product, and a lower structure 21, which is an integrally formed product, together, for example by welding, thereby forming a body.

[0016] As it is in Fig. As shown in Figure 4, the lower structure 21 has an intermediate floor section 23, a front lower projection section 24 projecting downwards from a front section of the intermediate floor section 23, and a rear lower projection section 25 projecting downwards from a rear section of the intermediate floor section 23. The lower structure 21 also has a side wall 26, which, as shown in Figure 4, Fig. 1 is shown, extending essentially upwards from a marginal section of a left side, which is a side of the intermediate floor section 23 in a left / right direction, and forming a side wall 27 which, as shown in Fig. As shown in Figure 4, the lower structure 21 extends upwards from an edge section of a right side, which is opposite a side of the intermediate floor section 23 in the left / right direction. Furthermore, the lower structure 21 has a rear end wall 28 of a rear end thereof, an intermediate front wall 29 of a front section thereof, a front floor section 30 of the front section thereof, an inclined wall 31 of the front section thereof, a front end wall 32 of a front end thereof, a connected flange section 33 of an upper end thereof, a reinforcing plate section 34 of a lower section thereof, and a coupling plate section 35, which is Fig. 1 is shown, and a coupling plate part 36 which is in Fig. Figure 4 shows the lower structure 21 being mounted in a position in the vehicle in which the rear end wall 28 and the front end wall 32 are perpendicular to a forward / reverse direction of the vehicle.

[0017] As it is in Fig. As shown in Figure 2, the front lower projection part 24 has a front mounting base part 38, which is arranged on an upper surface of the mounting attachment part 14 at the front of the master cylinder 12. The rear lower projection part 25 has a rear mounting base part 39, which is arranged on an upper surface of the mounting attachment part 15 at the rear of the master cylinder 12.

[0018] Since these front and rear mounting base parts 38 and 39 are provided on the upper surfaces of the mounting attachment part 14 and 15, arranged on the same plane on correspondingly lower surfaces thereof, the corresponding lower surfaces are arranged on the same plane and are inclined slightly upwards with respect to the horizontal in the forward direction. A mounting projection part 42, which projects vertically downwards with respect to the front mounting base part 38, is formed at an intermediate position of the front mounting base part 38. A mounting projection part 43, which projects vertically downwards with respect to the rear mounting base part 39, is also formed at an intermediate position of the rear mounting base part 39.

[0019] A communication opening 44, extending between the inside and outside of the tank body 18, is formed in the center of the mounting projection 42. A communication opening 45, also extending between the inside and outside of the tank body 18, is formed in the center of the mounting projection 43. The tank body 18 is attached to the mounting projections 42 and 43 by means of the aforementioned mounting openings 16 and 17 of the mounting attachment parts 14 and 15 of the main cylinder 12. The fluid pressure chambers of the main cylinder 12 can communicate via the mounting openings 16 and 17 of these mounting attachment parts 14 and 15.

[0020] As it is in Fig. As shown in Figure 4, the front lower projection part 24 has a front wall part 50 extending upward from a front edge section of the front assembly base part 38, a rear wall part 51 extending upward from a rear edge section of the front assembly base part 38, and a side wall part 52 extending upward from a right edge section of the front assembly base part 38. A lower section of the side wall 26 shown above is, as shown in Fig. 1 is shown, connected to a left edge section of the front arrangement base part 38. In other words, as shown in Fig. Figure 7 shows an area surrounded by the front wall part 50, the rear wall part 51, the side wall part 52 and the side wall 26, to the front arrangement base part 38, and the mounting projection part 42 is formed within this area.

[0021] The rear lower projection part 25 has: a front wall part 55 extending upwards from a front edge section of the rear arrangement base part 39, as shown in Fig. 4 shows a rear wall section 56 extending upwards from a rear edge section of the rear assembly base section 39, and a side wall section 57 extending upwards from a left edge section of the rear assembly base section 39, as shown in Fig. 1 is shown, and a side wall section 58 extending upwards from a right edge section of the rear arrangement base section 39, as shown in Fig. 4 is shown. In other words, as shown in Fig. Figure 7 shows an area enclosed by the front wall part 55, the rear wall part 56, the side wall part 57 and the side wall part 58, extending to the rear arrangement base part 39, and the mounting projection part 43 is formed within this area. As shown in Fig. As shown in Figure 1, a lower surface of a section between the front and rear lower projection part 24 and 25 of the intermediate floor part 23 is formed with a switch mounting part 61 to which a level indicator switch 60 is attached.

[0022] The side wall 26 has a rear wall section 65, a rear sloping wall section 66, an intermediate wall section 67, a front sloping wall section 68, a front wall section 69, and a front end wall section 70. The rear wall section 65 extends vertically forward from a left end edge section of the rear end wall 28 in the front / back direction. As shown in Fig. As shown in Figure 7, the rear inclined wall section 66 extends obliquely from a front edge section of the rear wall section 65 towards the front, so that it is located on a right side, i.e., an inside side in the left / right direction. The partition wall section 67 extends forward from a front edge section of the rear inclined wall section 66 parallel to the rear wall section 65. The front inclined wall section 68 extends obliquely from a front edge section of the partition wall section 67 towards the front, so that it is located on the inside side in the left / right direction. The front wall section 69 extends forward from a front edge section of the front inclined wall section 68 parallel to the partition wall section 67. As shown in Fig. As shown in Figure 1, the front end wall section 70 extends forward from an upper end section of the front wall section 69 to be flush with this upper end section. A lower section of the intermediate wall section 67 and a lower section of the front sloping wall section 68 form the front lower projection section 24. A lowest liquid level indicator line 71, which marks a lowest liquid level, is formed horizontally on an outer surface of the front sloping wall section 68 to project outwards. An indicator section 72 with the letters "MIN", which indicates that a liquid level is the lowest liquid level, is formed above this lowest liquid level indicator line 71 to project outwards.

[0023] As it is in Fig. As shown in Figure 4, the side wall 27 has a rear wall section 75, a laterally extended wall section 76, an intermediate wall section 77, and an inclined wall section 78. The rear wall section 75 extends vertically forward from a right end edge section of the rear end wall 28 in the front / back direction. The laterally extended wall section 76 extends from a front end edge section of the rear wall section 75, which extends from a lower section of the rear wall section 75 to an intermediate section of the rear wall section 75 in an up / down direction, to the right side, i.e., the outside in the left / right direction. The intermediate wall section 77 extends from an extended leading end edge section of the laterally extended wall section 76 parallel to the rear wall section 75.The inclined wall section 78 extends from a front edge section of the partition wall section 77 to the front, to be located on the left side, i.e., the inside in the left / right direction. A lowest liquid level indicator line 79, which marks a lowest liquid level, is formed horizontally on an outer surface of the partition wall section 77, projecting outwards. An indicator element 80 with the letters "MIN", indicating that a liquid level is the lowest liquid level, is formed on a back side of this lowest liquid level indicator line 79, projecting outwards.

[0024] As it is in Fig. As shown in Figure 7, the side wall 27 also has a rear sloping wall section 81, an intermediate wall section 82, a front sloping wall section 38, a front wall section 84 and a projecting base section 85, as shown in Figure 7. Fig. 4 is shown. The rear sloping wall section 81 extends from a front end edge section of an upper end section of the rear wall section 75 obliquely towards the front, in order to be positioned on the right side, that is, the outside in the left / right direction. The partition wall section 82, shown in Fig. 7 extends from a front end edge section of the rear inclined wall section 81 forwards parallel to the rear wall section 75. The front inclined wall section 83 extends from a front end edge section of the partition wall section 82 obliquely towards the front, to be located on the left side, i.e., the inside in the left / right direction. The front wall section 84 extends from a front end edge section of the front inclined wall section 83 forwards parallel to the partition wall section 82. The projecting bottom section 85, which is in Fig. As shown in Figure 4, it extends horizontally to the right from an upper edge section of the partition wall part 77 to the lower end edge sections of the rear sloping wall part 81, the partition wall part 82 and the front sloping wall part 83, which are in Fig. 7 are shown, to connect.

[0025] As it is in Fig. As shown in Figure 4, the intermediate front wall 29 extends upwards from a front edge section of the intermediate floor section 23 parallel to the rear end wall 28. The intermediate front wall 29 extends in the left / right direction around a front edge section of the front wall section 69 of the side wall 26, as shown in Figure 4. Fig. 1, and a front edge section of the sloping wall part 78 of the side wall 27, shown in Fig. 7, to connect them.

[0026] The front floor section 30 extends horizontally forward from an upper edge section of the intermediate front wall 29. The front floor section 30 extends in the left / right direction around a front floor section of the front end wall section 70 of the side wall 26, as shown in Fig. 1, and a front floor section of the front wall part 84 of the side wall 27, shown in Fig. 4, to connect them together.

[0027] The inclined wall 31 extends from a front edge section of the front base section 30, inclined upwards at the front. The inclined wall 31 extends in the left / right direction around a front section of the end wall section 70 of the side wall 26, as shown in Fig. 1, and a front section of the front wall part 84 of the side wall 27, shown in Fig. 4, to connect them together.

[0028] The front end wall 32 extends vertically upwards from a front edge section of the inclined wall 31. The front end wall 32 extends in the left / right direction around a front edge section of the front end wall part 70 of the side wall 26, as shown in Fig. 1, and a front end edge section of the front wall part 84 of the side wall 27, shown in Fig. 4, to connect them together.

[0029] As it is in Fig. As shown in Figure 7, the connected flange part 33 projects horizontally outwards from the total circumferences of continuous upper edge sections of the side wall 26, the side wall 27, the rear end wall 28 and the front end wall 32 and is arranged within the same horizontal plane.

[0030] The reinforcement plate part 34, shown in Fig. 1, is formed vertically at intermediate positions of the intermediate front wall 29 and the front bottom part 30 in the left / right direction in order to connect them. A front surface of the reinforcement plate part 34 is inclined upwards at the front, approximately at the same angle as the inclined wall 31.

[0031] The coupling plate part 35 is designed to connect the front lower projection part 24 and the rear lower projection part 25 in a position where it follows the forward / reverse direction. This coupling plate part 35 is designed with an insertion opening 91 into which a pin 90 is inserted for mounting on the main cylinder 12. The communication opening 36, shown in Fig. 4 is arranged parallel to the coupling plate part 35 in the left / right direction. The coupling plate part 36 connects the front lower projection part 24 and the rear lower projection part 25. The coupling plate part 36 is designed with an insertion opening 92, which is comparable to that of the coupling plate part 36.

[0032] As it is in Fig. As shown in Figure 7, a floating guide wall 95, an inner wall 96, an inner wall 97, a partition wall 100, a rib 101, an extended wall 102, a passage training wall 103, a passage training wall 104 and a projection wall 105 are formed in the lower structure 21.

[0033] The floating guide wall 95 has an approximately cylindrical shape in a vertical direction. The floating guide wall 95 is designed to be positioned in a projecting manner between the front and rear lower projection parts 24 and 25 of the intermediate floor part 23. A floating magnet 107, shown in Fig. 2, for checking an insufficient amount of liquid inside, is liftably inserted into this float guide wall 95. The level indicator switch 60, which is provided on the switch mounting part 61, detects that the float magnet 107 is approaching and thus that the amount of liquid is equal to or less than a certain value. As is shown in Fig. As shown in Figure 7, the floating guide wall 95 is formed with a cut-out part 108 which is directed towards an inner surface of the rear wall part 75 of the side wall 27.

[0034] The inner wall 96 has a side wall section 110, which is flush with an inner surface of the side wall section 57 of the rear lower projection section 25 and is designed to project from the intermediate floor section 23, and a connecting wall section 111, which is designed to project from the intermediate floor section 23 to connect the float guide wall 95 and an end edge section of the side wall section 110, which is opposite the rear end wall 28. The side wall section 110 lies parallel to the rear wall section 65 of the side wall 66 and is arranged in a direction perpendicular to the rear end wall 28. The side wall part 110 is designed such that a rear end of the same is arranged at a distance from the rear end wall in the forward / rear direction, and a front end of the same extends to the front relative to an inner surface of the front wall part 55 of the rear lower projection part 25.The connecting wall part 111 lies parallel to an inner surface of the rear end wall 28 and the front wall part 55 of the rear lower projection part 25.

[0035] The inner wall 97 has a side wall section 112, which is flush with an inner surface of the side wall section 58 of the rear lower projection section 25 and is designed to project from the intermediate floor section 23, and a connecting wall section 113, which is designed to project from the intermediate floor section 23 to connect the float guide wall 95 and an end edge section of the side wall section 112, which is opposite the rear end wall 28. The side wall section 112 lies parallel to the rear wall section 75 of the side wall 27 and is arranged in a direction perpendicular to the rear end wall 28. The side wall part 112 is spaced from the rear end wall 28 in the forward / rear direction and extends to an opposite side facing the rear end wall 28, relative to the inner surface of the front wall part 55 of the rear lower projection part 25.The connecting wall part 113 lies parallel to the inner surface of the rear end wall 28 and the front wall part 55 of the rear lower projection part 25.

[0036] The partition 100 is designed to project from the intermediate floor section 23 in order to connect the float guide wall 95 and an end edge section thereof to the rear end wall 28 of the rear wall section 75 of the side wall 27. The partition 100 is located on a front face of the connecting wall section 113 and lies parallel to the connecting wall section 113. The cut-out section 108 of the float guide wall 95, shown above, is located between the partition 100 and the connecting wall section 113. The rib 101 connects the rear wall section 65 of the side wall 26 and the float guide wall 95, extending vertically upwards from the intermediate floor section 23. The rib 101 is located on the same plane as the partition 100.

[0037] The extended wall 102 is designed to project from the intermediate floor section 23 and the front arrangement floor section 38 of the front lower projection section 24, extending forward from a position on a front section of the float guide wall 95, this position being directed towards the side wall 26, and it is further connected to the rear wall section 51 of the front lower projection section 24. The extended wall 102 comprises a base end wall section 115 extending from the float guide wall 95 to lie parallel to the intermediate wall section 67 of the side wall 26, and a leading end wall section 116 extending from an opposite side of the base end wall section 115, which is opposite the float guide wall 95, to lie parallel to the front inclined wall section 68 of the side wall 26.The leading end wall part 116 is spaced from the front wall part 50 of the front lower projection part 24 in the forward / rear direction.

[0038] The passage wall 103 is designed to project from the intermediate floor section 23 at a front face of the front lower projection section 24 and at a side of the side wall 27. The passage wall 103 comprises a base end wall section 118, an inclined intermediate wall section 119, and a leading end wall section 120. The base end wall section 118 extends from the front wall section 69 of the side wall 26 to be flush with an inner surface of the front wall section 50 of the front lower projection section 24. The inclined intermediate wall section 119 extends from an end edge section of the base end wall section 118 opposite the side wall 26 to be parallel to the front inclined wall section 83 of the side wall 27.The leading end wall part 120 extends from an end edge section of the inclined intermediate wall part 119, which is opposite the base end wall part 118, to be flush with an inner surface of the side wall part 52 of the front lower projection section 24.

[0039] The leading end wall section 120 is spaced away from the partition wall 100 in the forward / rear direction.

[0040] The passage wall 104 is designed to project from the front base section 30 and the projecting base section 85 on a front face of the passage wall 103 and on the side of the side wall 27. The passage wall 104 has a base end wall section 123, an inclined intermediate wall section 124, and a leading end wall section 125. The base end wall section 123 extends from an end section facing the front end wall section 70 of the front wall section 69 of the side wall 26 to be flush with an inner surface of the intermediate front wall 29. The inclined intermediate wall section 124 extends from an end edge section of the base end wall section 123 opposite the side wall 26 to be parallel to the front inclined wall section 83 of the side wall 27.The leading end wall section 125 extends from an end edge section of the inclined partition wall section 124, which is opposite the base end wall section 123, to be flush with an inner surface of the partition wall section 77 of the side wall 27. An end section of the leading end wall section 120, which is directed towards the rear end wall 28, is arranged closer to the rear end wall 28 than an end section of the leading end wall section 125, which is directed towards the rear end wall 28.

[0041] The projecting wall 105 is designed to protrude from the lower projection section 85 in such a way as to be flush with the intermediate wall section 77 of the side wall 27. The projecting wall 105 extends from an inner surface of the rear sloping wall section 81 of the side wall 27 in such a way as to be flush with the leading end wall section 125. The projecting wall 105 is spaced from the leading end wall section 125 in the front / back direction.

[0042] The float guide wall 95, the inner wall 96, the inner wall 97, the partition wall 100, the extended wall 102, the passage formation wall 103, the passage formation wall 104, and the projection wall 105 all have upper surfaces that are arranged on the same plane as an upper surface of the connecting flange part 33. The rib 101 has an upper surface that is lower than this.

[0043] As it is in Fig. As shown in Figure 4, the upper structure 20 has a roof section 130, an upper projection section 131 which extends upwards at the front relative to the roof section 130, and an inlet 132 which extends upwards from the upper projection section 131 and is inclined upwards at the front relative to it. The upper structure 20 also has a side wall 133, as shown in Figure 4. Fig. 1, a side wall 134, shown in Fig. 4, a rear end wall 135, a front end wall 136, and a connecting flange part 137 of a lower end thereof. The side wall 133 is configured to extend downwards from left edge sections of the roof section 130 and the upper projection part 131. The side wall 134 is configured to extend downwards from right edge sections of the roof section 130 and the upper projection part 131. The rear end wall 135 is configured to project downwards from a rear edge section of the roof section 130. The front end wall 136 is configured to extend downwards from a front end section of the upper projection part 131. The upper structure 20 is also mounted in a vehicle in a position where the rear end wall 135 and the front end wall 136 are perpendicular to the forward / reverse direction of the vehicle.

[0044] As it is in Fig. As shown in Figure 1, the upper projection part 131 has a front wall part 140 extending upwards from the front end wall 136 to be flush with the front end wall 136, a side wall part 141 extending upwards from a front section of the side wall 133 to be flush with the side wall 133, and a side wall part 142 extending from a front section of the side wall 134, as shown in Figure 1. Fig. 4, extends upwards to be flush with the side wall 134, and has a rear wall section 143 extending upwards from a front edge section of the roof section 130. The upper projection section 131 also has a sloping section 144, which connects the upper edge sections of the front wall section 140, the side wall section 141 and the side wall section 142 and is inclined downwards at the front in this respect, and a horizontal upper plate section 145, which connects the upper edge sections of the rear wall section 143, the side wall section 141 and the side wall section 142.

[0045] The inlet 132 has a tubular shape, extends vertically from the inclined part 144, and thus extends in order to be inclined upwards at the front. As is shown in Fig. As shown in Figure 2, an inner circumferential section of the inlet 132 becomes an injection path 148. This injection path 148 passes through the inside and outside of the tank body 18, or runs between the inside and outside of the tank body 18. An indicator line of the highest liquid level 149, which marks a highest liquid level, is horizontal on an outer surface of the side wall part 141, as shown in Figure 2. Fig. 1, designed to project outwards. An indicator part 150 with the letters “MAX”, indicating that a liquid level is the highest liquid level, is formed above this highest liquid level indicator line 149 to project outwards. A highest liquid level indicator line 151, indicating the highest liquid level, is also formed horizontally on an outer surface of the side wall part 142, shown in Fig. 4, designed to project outwards. An indicator element 152 with the letters "MAX", indicating that the liquid level is the highest liquid level, is designed to project outwards above this indicator line of the highest liquid level 151. The indicator lines of the highest liquid level 149 and 151 are designed in a higher position than the roof element 130.

[0046] As it is in the Fig. 1 and Fig. As shown in Figure 3, the side wall 133 has a rear wall section 155, a rear inclined wall section 156, an intermediate wall section 157, a front inclined wall section 158, and a front wall section 159. The rear wall section 155 extends vertically forward from a left end edge section of the rear end wall 135 in the front / back direction. The rear inclined wall section 156 extends obliquely from a front end edge section of the rear wall section 155 to the front, so that it is located on a right side, i.e., the inside in the left / right direction. The intermediate wall section 157 extends from a front end edge section of the rear inclined wall section 156, so that it lies parallel to the rear wall section 155. The front sloping wall section 158 extends slopingly from a front end edge section of the partition wall section 157 to the front, in order to be positioned on the right side.The front wall section 159 extends forward from a front end edge section of the front sloping wall section 158 to be parallel to the partition wall section 157.

[0047] As it is in Fig. As shown in Figure 3, the side wall 134 has a rear wall section 165, a rear inclined wall section 166, an intermediate wall section 167, a front inclined wall section 168, and a front wall section 169. The rear wall section 156 extends vertically forward from a right end edge section of the rear end wall 135 in the front / back direction. The rear inclined wall section 166 extends obliquely toward the front from a front end edge section of the rear wall section 165 to be located on the right side, i.e., the outside in the left / right direction. The intermediate wall section 167 extends forward from a front end edge section of the rear inclined wall section 166 to be parallel to the rear wall section 165. The front sloping wall section 168 extends from a front end edge section of the partition wall section 167 sloping towards the front, in order to be located on the left side, that is, the inside in the left / right direction.The front wall section 169 extends forward from a front end edge section of the front sloping wall section 168 to lie parallel to the intermediate wall section 167.

[0048] The connecting flange part 137 projects horizontally outwards from the total circumferences of continuous lower edge sections of the side wall 133, the side wall 134, the rear end wall 135 and the front end wall 136 and is arranged within the same horizontal plane.

[0049] As it is in Fig. Figure 8 shows a floating guide wall 175, an inner wall 176, an inner wall 177, a projection wall 178, a partition wall 180, an extended wall 182, a passage training wall 183, a passage training wall 184 and a projection wall 185 formed in the upper structure 20.

[0050] The floating guide wall 175 has an approximately cylindrical shape in a vertical direction. The floating guide wall 175 is designed to project from the inner surface of the roof section 130. The floating guide wall 175 has a cutout 187 on one side of the side wall 133 and a cutout 188 on one side of the side wall 134. The projecting wall 178 has a cross shape and is designed to project from the inner surface of the roof section 130. The projecting wall 178 is located at a central position on the floating guide wall 175.

[0051] The inner wall 176 has a side wall section 190, which lies parallel to the rear wall section 155 of the side wall 133 and is designed to project from the inner surface of the roof section 130, and a connecting wall section 191, which is designed to project from the inner surface of the roof section 130 to connect the float guide wall 175 and an end edge section of the side wall 190, which is opposite the rear end wall 135. The side wall section 190 follows a direction perpendicular to the rear end wall 135 and is spaced from the rear end wall 135 in the front / back direction. The connecting wall section 191 lies parallel to the rear end wall 135. The cut-out section 187 of the float guide wall 175 is arranged on a side opposite the connecting wall section 191, which is opposite the rear end wall 135.

[0052] The inner wall 177 has a side section 192, which lies parallel to the rear wall section 165 of the side wall 134 and is designed to project from the inner surface of the roof section 130, and a connecting wall section 193, which is designed to project from the inner surface of the roof section 130 to connect the float guide wall 175 and an end edge section of the side wall section 192, which is opposite the rear end wall 135. The side wall section 192 follows a direction perpendicular to the rear end wall 135 and is spaced from the rear end wall 135 in the front / back direction. The connecting wall section 193 lies parallel to the rear end wall 135.

[0053] The partition wall 180 is designed to project from the inner surface of the roof section 130 in order to connect the floating guide wall 175 and an end edge section of the rear wall section 165 of the side wall 134, which is opposite the rear end wall 135. The partition wall 180 is arranged on a front face of the connecting wall section 193 and lies parallel to the connecting wall section 193. The cut-out section 188 of the floating guide wall 175 is arranged between the partition wall 180 and the connecting wall section 193.

[0054] The extended wall 182 is designed to project from the inner surface of the roof section 130 and to extend forward from a position of a front section of the floating guide wall 175, this position being directed towards the side wall 133. The extended wall 182 is composed of a base end wall section 195, extending from the floating guide wall 175 and parallel to the intermediate wall section 157 of the side wall 133, and a leading end wall section 196, extending from an opposite side of the base end wall section 195, which is opposite the floating guide wall 175 and parallel to the forward sloping wall section 158 of the side wall 133.

[0055] The passage wall 183 is designed to project from the inner surface of the roof section 130 and comprises a base end wall section 198, a sloping intermediate wall section 199, and a leading end wall section 200. The base end wall section 198 extends from an end section of the front wall section 159, which is opposite the front end wall 136, to lie parallel to the front end wall 136. The sloping intermediate wall section 199 extends from an end edge section of the base end wall section 198, which is opposite the side wall 133, to lie parallel to the front sloping wall section 168 of the side wall 134. The leading end wall section 200 extends from an end edge section of the inclined partition wall section 199, which is opposite the base end wall section 198, in order to lie parallel to the partition wall section 167 of the side wall 134. The leading end wall section 200 is spaced from the partition wall 180 in the front / back direction.

[0056] The passage wall 184 is designed to project from the inner surface of the roof section 130 and comprises a base end wall section 203, an inclined intermediate wall section 204, and a leading end wall section 205. The base end wall section 203 is located at the base end wall section 198, which faces the front end wall 136, and extends from the front wall section 159 of the side wall 133 parallel to the front end wall 136. The inclined intermediate wall section 204 extends from an end edge section of the base end wall section 203, which is opposite the side wall 133, to lie parallel to the front inclined wall section 168 of the side wall 134. The leading end wall section 205 extends from an end edge section of the inclined partition wall section 204, which is opposite the base end wall section 203, to lie parallel to the partition wall section 167 of the side wall 134.An end section of the above-described leading end wall part 200, which is directed towards the rear end wall 135, is arranged closer to the rear end wall 135 than to an end section of the leading end wall part 205, which is directed towards the rear end wall 135.

[0057] The projecting wall 185 is designed to extend in a projecting manner from the inner surface of the roof section 130, following the intermediate wall section 167 of the side wall 134. The projecting wall 135 extends from an inner surface of the sloping wall section 166 of the side wall 134 to be flush with the leading end wall section 205. The projecting wall 185 is spaced from the leading end wall section 205 in the forward / rear direction.

[0058] The floating guide wall 175, the inner wall 176, the inner wall 177, the partition wall 180, the extended wall 182, the passage formation wall 183, the passage formation wall 184 and the projection wall 185 all have deep or deeper surfaces that are arranged on the same plane as the deep or deeper surface of the connecting flange part 137.

[0059] As it is in Fig. As shown in Figure 5, the roof section 130 has a main plate section 210, which is arranged horizontally, and a sloping plate section 211, which is arranged to be inclined with respect to the horizontal. As shown in Fig. As shown in Figure 3, the inclined plate section 211 comprises a plate section 212, which is approximately rectangular, elongated in the front / back direction, and has a wide area, and a plate section 213, which is approximately rectangular, short in the front / back direction, and has a narrow area. Plate sections 212 and 213 are arranged on the same plane. The inclined plate section 211 has an L-shape in a top view. The inclined plate section 211 extends within a region from the partition wall section 167 to the front inclined wall section 168 in the front / back direction, is completely separated from the side wall 134, and has a shape in which a portion of it extends beyond the side wall 133 on plate section 213.

[0060] As it is in Fig. As shown in Figure 5, the inclined plate section 211 extends from a position of the passage wall 184 behind the passage wall 183 to a position adjacent to the partition wall 180. The inclined plate section 211 is inclined such that the lowest elevation of a section connected to the base end wall section 203 of the passage wall 184 is at the lowest elevation, and the elevation increases from the base end wall section 203 to the rear end wall 135. As shown in Figure 5, the inclined plate section 211 is inclined such that the section connected to the base end wall section 203 of the passage wall 184 is at its lowest elevation, and the elevation increases from the base end wall section 203 to the rear end wall 135. Fig. As shown in Figure 6, the inclined plate section 211 is tilted such that the height position at the same position is constant in the forward / reverse direction, regardless of left / right orientation. Furthermore, as shown in Figure 6, the inclined plate section 211 is tilted such that the height position at the same position is constant in the forward / reverse direction. Fig. Figure 5 shows an end section of the inclined plate part 211, which is directed towards the right end wall 135, identical in height position to the main plate part 210.

[0061] The roof section 130 has projecting wall sections 214 to 219 that extend upwards from an edge section of the sloping panel section 211 to be connected to the main panel section 210, and they are in Fig. Figure 3 shows the projecting wall section 214. This section extends from the front edge sections of the panel sections 212 and 213, is parallel to the front end wall 136, and extends beyond the side of the side wall 133. This projecting wall section 215 extends from a front section of the panel section 212, which faces the side wall 134, and is parallel to the front sloping wall section 168. This projecting wall section 216 extends from an intermediate section and a rear section of the panel section 212, which faces the side wall 134, in a forward / backward direction and follows the intermediate wall section 167. This projecting wall section 216 is slightly curved to reduce the distance between the intermediate wall section 167 and the rear side. The projecting wall section 217 is a section that rises from a rear edge section of the plate section 213, lies parallel to the projecting wall section 214 and extends beyond the side of the side wall 133.The projecting wall section 218 is a section that projects from the intermediate section of the panel section 212, which is directed towards the side wall 133 in the forward / rear direction, and lies parallel to the intermediate wall section 157. The projecting wall section 219 is a section that rises from the rear section of the panel section 212, which is directed towards the side wall 133, and lies approximately parallel to the projecting wall section 215.

[0062] In the roof section 130, a rear edge section of the panel section 212 is connected to the main panel section 210 to form a boundary section 220 with the main panel section 210. This boundary section 220 lies parallel to the projecting wall section 214. As shown in Fig. As shown in Figure 5, the roof section 130 is formed with a concave section 221 that is recessed downwards relative to the main plate section 210, through the inclined plate section 211 and the projecting wall sections 214 to 219. Furthermore, if a section of the main plate section 210 corresponding to a communication path 231 (described below) is defined as a communication path roof plate section 210A, the concave section 221 is formed to be recessed downwards relative to the communication path roof plate section 210A. In this way, the concave section 221 is formed to create a surface section 222 (described below). This allows the surface section 222 to be identified by observing the external appearance of the upper structure 20, thereby improving the manufacturing efficiency of the tank 18. Furthermore, if the upper structure 20 is formed, it is possible to connect the inclined plate part 211 with a specific orto form a fixed thickness and to prevent deformation that could be caused by a heat sink or the like, thereby improving the manufacturing accuracy of the tank.

[0063] The hatched area, shown in Fig. 8, designates the surface part 222 within the inclined plate part 211. That is, as it is in Fig. As shown in Figure 5, this surface section 222 is a leading or front end surface of a projecting side of a convex part 226, which is formed on a lower surface side of the roof section 130 to project downwards by forming the concave part 221 on an upper surface side of the roof section 130. As with the inclined plate section 211, this surface section 222 is arranged on the same plane and is inclined such that the height of a section connected to the base end wall section 203 of the passage wall 184 is lowest, and the height increases from the base end wall section 203 to the rear end wall 135. As shown in Figure 5, the surface section 222 is formed on a lower surface side of the roof section 130. Fig. As shown in Figure 6, the surface section 222 is inclined such that its height position at the same position is constant in the forward / backward direction, regardless of its position in the left / right direction. Furthermore, the height position of an end section of the surface section 222, which faces the rear end wall 135, is identical to that of a horizontal main ceiling surface 225, which is an interior surface of the main panel section 210, as shown in Figure 6. Fig. Figure 5 is shown. The surface part 222 is constructed to form the concave part 221, in which the inclined plate part is recessed downwards relative to the main plate part 210, but the surface part 222 can be formed as a plane using the roof part 130, without forming the concave part 221.

[0064] As in Fig. Figure 8 shows the surface section 222 consisting of an L-shaped surface 223, which is arranged between the passage wall 183 and the passage wall 184, and an approximately pentagonal surface 224, which is arranged on an opposite side of the passage wall 183, which is opposite the passage wall 184. Surface 223 is constructed within a total area between the base end wall sections 198 and 203, a total area between the inclined intermediate wall sections 199 and 204, and a total area of ​​a section that overlaps the leading end wall section 205 in the front / back direction, within a total area between the leading end wall sections 200 and 205. An end edge section 223a of surface 223, which is directed towards the rear end wall 135, is a section that appears by the boundary part 220 of the inclined plate section 211, shown in Fig. 3, is formed, and lies parallel to the rear end wall 135.

[0065] As it is in Fig. As shown in Figure 8, surface 224 extends from the base end wall section 198 to an opposite side facing the base end wall section 203, and extends from the leading end wall section 200 to an opposite side facing the leading end wall section 205. An end edge section 224a of surface 224, which is directed towards the rear end wall 135, is formed parallel to the rear end wall 135. A position of surface 224 in the forward / reverse direction is identical to that of end edge section 223a. As with end edge section 223a, end edge section 224a appears by the boundary part 220 of the inclined plate section 211, shown in Figure 8. Fig. 3, is being trained.

[0066] As it is in Fig. Figure 8 shows an end edge section 224b of the surface 224, which is directed towards the side wall 133 rather than the extended wall 182 parallel to the leading end wall part 200, on one side of the leading end wall part 200. The end edge section 224b is a section that appears by the projecting wall part 218, shown in Fig. 3, is trained. Furthermore, as is stated in Fig. As shown in Figure 8, the surface 224 is inclined such that an end edge section 224c of the same intersects both end edge sections 224a and 224b at an obtuse angle. The end edge section 224c is a section that appears by the projecting wall part 219, shown in Figure 8. Fig. 3, is formed. The end edge sections 224a, 224b and 224c do not overlap the float guide wall 175, the extended wall 182, the partition wall 180 and the projection wall 185.

[0067] The connecting flange part 33 of the lower structure 21, shown in Fig. 7, and the connecting flange part 137 of the upper structure 20, shown in Fig. 8, for example, are joined by welding to form the tank body 18. At this point, the rear end walls 28 and 135, the front end walls 32 and 136, the rear wall sections 65 and 155, the rear inclined wall sections 166 and 156, the intermediate wall sections 67 and 157, and the front inclined wall sections 68 and 158 are each connected over their entire length by superimposition at horizontal positions. Furthermore, the front wall section 69 and the front end wall section 70 are connected to the front wall section 159 by superimposition at horizontal positions over their entire length. Furthermore, the rear wall sections 75 and 165, the rear sloping wall sections 81 and 166, the partition wall sections 82 and 167, the front sloping wall sections 83 and 168 and the front wall sections 84 and 169 are each connected by superimposing horizontal positions over the entire length.

[0068] Furthermore, the floating guide walls 95 and 175, the side wall sections 110 and 190, the connecting wall sections 111 and 191, the side wall sections 112 and 192, the connecting wall sections 113 and 193, the partition walls 100 and 180, and the base end wall sections 115 and 195 are each connected by superimposing horizontal sections over their entire length. Furthermore, the leading end wall sections 116 and 196, the base end wall sections 118 and 198, the inclined partition wall sections 119 and 199, the leading end wall sections 120 and 200, the base end wall sections 123 and 203, the inclined partition wall sections 124 and 204, and the leading end wall sections 125 and 205 are each connected by superimposing horizontal positions over their entire length. Furthermore, the projecting walls 105 and 185 are each connected by superimposing horizontal positions over their entire length, thereby aligning the front end positions.

[0069] In the tank body 18, a section becomes a tank chamber 230, in which liquid is stored, which is surrounded by the passage form walls 104 and 184, the projection walls 105 and 185, the front wall parts 69 and 159, the front sloping wall parts 68 and 158, the intermediate wall parts 67 and 157, the rear sloping wall parts 66 and 156, the rear wall parts 65 and 155, the rear end walls 28 and 135 and the rear wall parts 75 and 165.Furthermore, a section surrounded by the front end walls 32 and 136, the front wall sections 84 and 169, the front end wall section 70 and the front wall section 59, the front wall sections 69 and 159, the front sloping wall sections 83 and 168, the intermediate wall sections 82 and 167, the rear sloping wall sections 81 and 166, the passage training walls 104 and 184 and the projection walls 105 and 185, forms a communication path 231 extending from the inlet 132, which is provided to allow liquid to be introduced from the outside into the tank chamber 230 and is positioned at the front of the vehicle, to the rear of the vehicle. The tank chamber 230 communicates with the secondary fluid pressure chamber of the main cylinder 12 via the communication opening 44 and stores fluid that is to be supplied to the secondary fluid pressure chamber of the main cylinder 12.

[0070] A lower end of the communication path 231 is defined by an inner surface facing an upper side of the front bottom section 30 and an inner surface facing an upper side of the projecting bottom section 85, with an elevation position aligned with this inner surface. Thus, a communication opening 232, which allows communication between the communication path 231 and the tank chamber 230, is formed between the passage training walls 104 and 184 and between the projecting walls 105 and 185. As shown in Fig. As shown in Figure 4, the communication opening 232 has an upper end section formed on an inner surface facing a lower side of the main plate part 210 of the roof part 130, and a lower end section formed on an inner surface facing the upper side of the projection base part 85. As shown in Fig. As shown in Figure 5, the surface section 222 of the roof section 130, which becomes an upper section of the tank chamber 230, is inclined so that it becomes higher from the front of the vehicle to the communication opening 232 at the rear of the vehicle, in a state in which the tank chamber is mounted in a vehicle.

[0071] A liquid passing through inlet 132, as shown in Fig. 8, is filled and introduced through the communication opening 232 into the tank chamber 230 by means of the communication path 231, is placed in a passage 233 between the passage training walls 103 and 183 and between the passage training walls 104 and 184, as shown in the Fig. 7 and Fig. 8, introduced, with a lower end section thereof formed on an inner surface of the intermediate floor part 23 deeper than the communication opening 232. Simultaneously, the fluid is introduced into a chamber 235, which has the inner area of ​​the front lower projection part 24, via an intermediate opening 234 between the passage forming walls 103 and 183 and between the partition walls 100 and 180. Here, chamber 235 is also a tank chamber in which fluid is stored, and this communicates with the primary fluid pressure chamber of the master cylinder, but for the purpose of description, it is simply referred to as a 'chamber'. As is described in Fig. As shown in Figure 4, the intermediate opening 234 has an upper end section formed on the inner surface facing the lower side of the main plate part 210 of the roof part 130, and a lower end section formed on an inner surface (not shown) facing the upper side of the intermediate floor part 23. As shown in the Fig. 7 and Fig. As shown in Figure 8, the intermediate opening 234 is designed to be displaced towards a rear side relative to the communication opening 232. When a section in the front lower projection part 24 of this chamber 235 is filled with a liquid, the liquid is introduced into a chamber 237, which contains the interior of the rear lower projection part 25, via a passage 236 between the front inclined wall parts 68 and 158, the intermediate wall parts 67 and 157, the rear inclined wall parts 66 and 156, the rear wall parts 65 and 155, the extended walls 102 and 182, the float guide walls 95 and 175, and the inner walls 96 and 176, with a lower end section of this passage being formed on the inner surface of the intermediate floor part 23.When a section in the rear lower projection part 25 of this chamber 237 is filled with the liquid, the liquid is introduced into a chamber 239 within the float guide walls 95 and 175, via the cut-out part 108, through a passage 238 between the rear wall parts 75 and 165, the partition walls 100 and 180 and the inner walls 97 and 177, with a lower end section of it being formed on the inner surface of the intermediate floor part 23.

[0072] Since the passage 233 is formed at the front relative to the communication opening 232 and since the chamber 235 is formed at the front relative to the intermediate opening 234, the amount of fluid that is drained into the communication path 231 can be controlled or monitored, even if the fluid in the tank chamber 230 moves forward during braking.

[0073] This means that if the amount of liquid being drained into communication channel 231 is large, the liquid could leak out of a gap between the cap 19 and the tank body 18, but this condition can be prevented.

[0074] In the tank described above in patent literature 1, a gap is formed between the tank's roof section and the liquid level, even when the maximum permissible liquid quantity has been introduced. In contrast, if, according to tank 11 of the present embodiment, the liquid is introduced until the liquid level corresponds to the indicator line of the maximum permissible liquid level 149 in order to improve the liquid's storage efficiency, the liquid comes into contact with the roof section 130.If, in this case, the liquid is introduced through the inlet 132 until the liquid level matches the indicator line of the highest liquid level 149, air may collect in the passage 233 and the chamber 235, which are positioned at the front relative to the communication opening 232 of the tank chamber 230, even if the roof section 130 has a flat surface, if the roof surface is only slightly inclined upwards at the front, for example due to an assembly tolerance. This means that it is possible that the liquid cannot be introduced satisfactorily into the tank chamber.

[0075] In contrast, tank 11 according to the present embodiment, as shown by the hatched area in Fig. As indicated in Figure 8, the surface area 222, which is provided on the upper section of the tank chamber 230, is inclined so that the height increases from the front of the vehicle to the communication opening 232 at the rear of the vehicle when the tank chamber is installed in the vehicle. This allows air in the tank chamber 230 to be satisfactorily vented from the communication opening 232 during liquid filling, and reduces the amount of air that collects in the passage 233 and the chamber 235, which are located at the front relative to the communication opening 232 of the tank chamber 230. In other words, it is possible to fill the tank chamber 230 satisfactorily and to store more liquid in the tank chamber 230. Consequently, it is possible to further improve the storage efficiency of the liquid, allowing the tank to be designed more compactly.Furthermore, since the amount of air that collects in tank chamber 230 can be reduced, the appearance of tank chamber 230 improves when it stores liquid.

[0076] According to the first embodiment, the inclined surface section 211 is formed on the upper structure 20, thereby realizing the surface section 222. That is, the surface section 222 is integrally formed on the upper structure 20, but the present invention is not limited to this. The surface section 222 can be realized using the inclined surface section 211 as an inclined surface element independently of the upper structure 20 and the lower structure 21, and by arranging the inclined surface element between the upper structure 20 and the lower structure 21 of the tank 18. [Second embodiment]

[0077] Next, a second embodiment based on the Fig. 9 described. Fig. Figure 9 is a sectional view equivalent to the cross-section CC of the Fig. 3. In the first embodiment, the surface section 222 is inclined so that the height position at the same position is constant in the forward / reverse direction, regardless of the position in the left / right direction. According to the second embodiment, a surface section 322, corresponding to the surface section 222, is inclined in both the forward / reverse and left / right directions.

[0078] The details are as follows: Fig. Figure 9 shows that the height position of an inclined plate section 311 (corresponding to the inclined plate section 211) in the forward / reverse direction of the vehicle is the same as in the first embodiment. On the other hand, the height position of the inclined plate section 311 in the left / right direction of the vehicle is inclined such that the height position of a section connected to a projecting wall section 318 (corresponding to the projecting wall section 218), which forms a concave part 321 (corresponding to the concave part 221), is at its lowest, and the height position increases as it approaches a leading end wall section 205.

[0079] Furthermore, as with the inclined plate section 311, the surface section 322 has the same height position in the forward / reverse direction of the vehicle as in the first embodiment. On the other hand, the height position of the surface section 322 in the left / right direction of the vehicle is inclined such that the height position of the section connected to the projecting wall section 318, which forms the concave part 321, is lowest, and the height position increases with approach to the leading end wall section 205. That is, the surface section 322 is inclined such that the height position of a section to which a base end wall section 203 is connected with the projecting wall section 318 is lowest, and the height position increases with approach to a communication opening 232. In other words, the surface section 322 is inclined such that the height position increases from a diagonal position of a section corresponding to the communication opening 232 to the communication opening 232.For this reason, air can be rapidly discharged from the communication opening 232 through the surface section 322, and the amount of air that collects in a passage 233 and a chamber 235, which are arranged at the front of a tank chamber 330 (corresponding to the tank chamber 230) relative to the communication opening 232, can be reduced. This means that it is possible to satisfactorily introduce liquid into the tank chamber 330 and to store more liquid in the tank chamber 330. Consequently, it is possible to further improve the storage efficiency of the liquid, which allows the tank to be designed more compactly. Furthermore, since the amount of air that collects in the tank chamber 330 can be reduced, the appearance of the tank chamber 330 when it contains liquid is improved. [Third embodiment]

[0080] Next, a third embodiment based on the Fig. 10 and Fig. 11 described. In the third embodiment, a tank body 418 is partially modified relative to the tank body 18 of the first embodiment. In particular, an upper structure 420 of the tank body 418 is partially modified relative to the upper structure 20. To form the surface part 222, according to the first embodiment, the inclined plate part 211 is formed by the concave part 221, which is recessed on the lower side relative to the main plate part 210. In the third embodiment, a step part 401, which projects towards an upper side relative to a main plate part 410 (corresponding to the main plate part 210), is formed, and an inclined plate part 411 (corresponding to the inclined plate part 211), a concave part 421 (corresponding to the concave part 221) and a communication path roof plate part 410A (corresponding to the communication path roof plate part 210A) are constructed to be formed on this step part 401.Consequently, a surface section 422, corresponding to surface section 222, is formed in the inclined plate section 411. As shown in . Fig. As shown in Figure 11, the inclined plate part 411, the concave part 421, and the surface part 422 have the same structure as the inclined plate part 211, the concave part 221, and the surface part 222 of the first embodiment. Thus, the concave part 421 is designed to be recessed relative to the communication path roof plate part 410A. However, the concave part 421 is formed on one upper side relative to the main plate part 410.

[0081] In this way, the third embodiment can also exert the same effects as the first embodiment, due to the surface part 422.

[0082] In each of the embodiments, the surface part 222, 322 or 422 is designed as an inclined surface, but there is no restriction on this as long as it rises from one side of the vehicle to the communication opening on the other side of the vehicle, and it may be designed as a curved surface or a stepped surface.

[0083] Each of the embodiments described above relates to a tank in which an inlet for introducing a liquid from the outside into a tank chamber where the liquid is stored is provided on one side of a vehicle, a communication path extending to the other side of the vehicle, and a communication opening capable of establishing communication between the communication path and the tank chamber are formed. A surface portion, which increases in height from one side of the vehicle to the communication opening on the other side of the vehicle when the tank chamber is mounted in the vehicle, is formed on an upper section of the tank chamber. This surface portion effectively releases air from the communication opening, thereby reducing the amount of air that accumulates in the tank chamber.This means that the liquid can be introduced into the tank chamber in a satisfactory manner.

[0084] Furthermore, a roof section is formed on the upper part of the tank chamber, and the surface section is formed at a position that is recessed downwards relative to the roof section. Furthermore, according to the tank, in which an upper structure, on which the inlet is provided, and a lower structure, on which the tank chamber is provided, are attached and formed, the surface section is formed on the upper structure. Furthermore, the communication opening is formed on a rear side of the tank chamber in the forward / reverse direction of the vehicle, and the surface section is inclined such that its height increases from a front to a rear position in the forward / reverse direction of the vehicle. Furthermore, an indicator line for the highest liquid level in the tank is formed at an upper position in a vertical direction relative to the surface section. Industrial applicability

[0085] According to the tank described above, the liquid can be introduced in a satisfactory manner. Reference symbol list 11 Tank 132 Admission 222 Area section 230 tank chamber 231 Communication channel 232 Communication opening

Claims

[1] Tank (11) which has: an inlet (132) provided on one side of a vehicle to introduce a liquid from the outside into a tank chamber (230) in which the liquid is stored; a communication path (231) designed to extend from the inlet (132) towards the other side of the vehicle; and a communication opening (232) capable of establishing communication between the communication path (231) and the tank chamber (230), wherein a surface section (222) which is constructed such that its height increases from one side of the vehicle to the communication opening (232) on the other side of the vehicle, in a state in which the tank chamber (230) is mounted in the vehicle, is formed on an upper section of the tank chamber (230), and wherein a roof part (130) is formed on the upper section of the tank chamber (230) and the surface part (222) is formed at a position which is recessed downwards relative to the roof part (130). [2] Tank (11) which has: an inlet (132) provided on one side of a vehicle to introduce a liquid from the outside into a tank chamber (230) in which the liquid is stored; a communication path (231) designed to extend from the inlet (132) towards the other side of the vehicle; and a communication opening (232) capable of establishing communication between the communication path (231) and the tank chamber (230), wherein a surface section (222) which is constructed such that its height increases from one side of the vehicle to the communication opening (232) on the other side of the vehicle, in a state in which the tank chamber (230) is mounted in the vehicle, is formed on an upper section of the tank chamber (230), and wherein the tank (11) further features: an upper structure (20) in which the inlet (132) is provided; and a lower structure (21) on which the tank chamber (230) is provided, wherein the upper structure (20) and the lower structure (21) are attached to form a tank body (18), and the surface area (222) is formed on the upper structure (20). [3] Tank (11) according to one of claims 1 or 2, wherein the communication opening (232) is formed on a rear side of the tank chamber (230) in a forward / reverse direction of the vehicle; and the surface section (222) is inclined such that a height position increases from a front towards a rear in the forward / rear direction of the vehicle. [4] Tank (11) according to one of claims 1 to 3, wherein an indicator line of the highest liquid level in the tank (11) is formed at an upper position in a vertical direction relative to the surface part (222).

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