Cover body

Abstract

To provide a cover body capable of installing a ball cock inside a tank while suppressing breakage of a cover main body.SOLUTION: A cover body 10 comprises a reinforcement plate 30 having higher rigidity than a cover main body 20 and fixed to the cover main body 20, and a connection pipe 60, wherein one end of the connection pipe 60 is connected to a ball cock 80 so as to communicate with the ball cock 80, the connection pipe 60 is fixed to the cover main body 20 via the reinforcement plate 30, the other end of the connection pipe 60 is connected to a supply pipe 2 so as to communicate with the supply pipe 2, and a piping constituted by connecting the connection pipe 60 and the supply pipe 2 is provided so as to penetrate the cover main body 20 and extend to the interior of a tank 1, the ball cock 80 supplies liquid from the supply pipe 2 to the tank 1 via the connection pipe 60 when a liquid level is less than a predetermined liquid level A in a state where the cover main body 20 is attached to the tank 1, and does not supply the liquid from the supply pipe 2 to the tank 1 via the connection pipe 60 when the liquid level is at the predetermined liquid level A.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a lid. [Background technology]

[0002] For example, Patent Document 1 discloses that a ball tap is placed inside a tank, a hose connection port is extended from the lid, and the tank is waterproofed with alternating rubber gaskets and nuts, and a hose is connected to the ball tap from a water faucet. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3118105 Summary of the Invention [Problem to be solved by the invention]

[0004] However, it is desirable to provide a ball tap inside the tank while preventing damage to the lid body.

[0005] Therefore, an object of the present invention is to provide a lid body that allows a ball tap to be installed inside a tank while preventing damage to the lid body. [Means for solving the problem]

[0006] (1) The lid body of the present invention comprises a lid body attached to the tank so as to close the opening of the tank; a reinforcing plate fixed to the lid body and having higher rigidity than the lid body; a ball tap provided so as to be located inside the tank when the lid body is attached to the tank; and a connecting pipe having one end connected to the ball tap so as to communicate with the ball tap and fixed to the lid body via the reinforcing plate, and having the other end connected to a supply pipe provided outside the tank so as to communicate with the supply pipe when the lid body is attached to the tank. and a connecting pipe that is provided so as to penetrate the lid body and extend from the outside of the tank to the inside of the tank, and the ball tap is characterized in that, when the lid body is attached to the tank, if the level of the liquid stored in the tank is below a predetermined level, the ball tap supplies the liquid supplied from the supply pipe to the tank via the connecting pipe, and when the level of the liquid stored in the tank is the predetermined level, the ball tap does not supply the liquid supplied from the supply pipe to the tank via the connecting pipe.

[0007] (2) In the lid body of (1) above, it is preferable that the lid body has a top plate portion, the top plate portion has a flat plate portion in the center of the top plate portion, and the reinforcing plate is arranged parallel to the flat plate portion and fixed to the flat plate portion.

[0008] (3) In the lid of (2) above, it is preferable that the top surface of the top plate has a recess, and the flat plate forms the bottom surface of the recess.

[0009] (4) In the lid of (2) or (3) above, it is preferable that the lid further comprises two reinforcing plates disposed on either side of the flat plate portion.

[0010] (5) In the cover of (2) or (3) above, it is preferable that the connecting pipe is provided so as to penetrate the flat plate portion and the reinforcing plate. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a lid body that can accommodate a ball tap inside a tank while preventing damage to the lid body. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 2 is a perspective view showing a lid and the like according to the embodiment of the present invention. [Figure 2] FIG. 2 is an exploded perspective view of the lid and other components of FIG. 1. [Figure 3] FIG. 2 is an exploded perspective view of the cover of FIG. 1. [Figure 4] FIG. 2 is a cross-sectional view showing the cover and other parts of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0013] A lid 10 according to an embodiment of the present invention will be described below with reference to FIGS.

[0014] As shown in FIG. 1, a lid 10 is attached to a tank 1. As will be described in detail later, the lid 10 is connected to one end of a supply pipe 2, and when the level of the liquid stored in the tank 1 is below a predetermined level A (see FIG. 4), the lid supplies the liquid from the supply pipe 2 to the tank 1, and when the level of the liquid stored in the tank 1 is equal to the predetermined level A, the lid does not supply the liquid from the supply pipe 2 to the tank 1. For example, the liquid is water. The supply pipe 2 is provided outside the tank 1 to supply the liquid to the tank 1. For example, the other end of the supply pipe 2 is connected to a water pipe (not shown) or the like via a faucet (not shown) or a valve (not shown) or the like. By opening the faucet or the valve, tap water is supplied from the water pipe to the supply pipe 2, and the tap water flows out from the one end of the supply pipe 2.

[0015] The tank 1 is connected to a discharge pipe 3 for discharging the liquid stored in the tank 1 to the outside of the tank 1. For example, one end of the discharge pipe 3 is located inside the tank 1, and the other end of the discharge pipe 3 is connected to a pump (not shown) or the like. By driving the pump, the liquid stored inside the tank 1 is sucked from the one end of the discharge pipe 3 and discharged to the outside of the tank 1.

[0016] By using the lid 10, even if a faucet or valve or the like is left open, when the level of the liquid stored in the tank 1 reaches a predetermined level A, the liquid will no longer be supplied to the tank 1, so it is possible to prevent the liquid from leaking from the tank 1 without closing the faucet or valve or the like. Furthermore, by using the lid 10, if the faucet or valve or the like is left open, when the liquid is discharged from the tank 1 and the level of the liquid stored in the tank 1 falls below the predetermined level A, the liquid can be refilled into the tank 1 without opening the faucet or valve or the like.

[0017] As shown in Figures 2 to 4, the lid body 10 includes a lid main body 20, two reinforcing plates 30, 40, a fastener 50, a connecting pipe 60, a fastener 70, and a ball tap 80. Figure 2 is an exploded perspective view of the lid body 10 and the tank 1, and of the lid body 10 and the supply pipe 2. Here, only a mouth portion 1a (described later) of the tank 1 is shown. Figure 4 is a cross-sectional view passing through the center of the through-hole 21d and the center of the through-hole 21f.

[0018] The lid body 20 is attached to the tank 1 so as to close the opening of the tank 1. In this embodiment, the tank 1 has a cylindrical mouth portion 1a that opens upward, and the lid body 20 is detachably attached to the tank 1 so as to close the opening of the mouth portion 1a. A thread (not shown) is formed on the inner surface of the mouth portion 1a to threadably engage with a thread (not shown) formed on the outer surface of the side plate portion 24 of the lid body 20, and the lid body 20 is attached to the tank 1 by threading these threads. For example, the lid body 20 is made of resin or the like. The lid body 20 has a top plate portion 21, a side plate portion 22, a connecting plate portion 23, a side plate portion 24, and a bottom plate portion 25.

[0019] The top plate portion 21 has a flat plate portion 21a, a protruding portion 21b, a flat plate portion 21c, a through hole 21d, a plurality of through holes 21e, and a plurality of through holes 21f. The flat plate portion 21a is flat and annular. The protruding portion 21b extends inward from the inner periphery of the flat plate portion 21a so as to be located on the opposite side to the bottom plate portion 25, and is annularly formed along the inner periphery of the flat plate portion 21a. The inner periphery of the protruding portion 21b is rectangular and bent toward the bottom plate portion 25. The flat plate portion 21c is flat and rectangular. The outer periphery of the flat plate portion 21c is connected to the inner periphery of the protruding portion 21b. The flat plate portion 21c is provided in the center of the top plate portion 21. The top surface of the top plate 21 has a recess formed by the protrusion 21b and the flat plate 21c, and the flat plate 21c forms the bottom of the recess. The through-hole 21d is a through-hole through which the connecting pipe 60 is inserted and penetrates the center of the flat plate 21c. The multiple through-holes 21e are through-holes for fixing the two reinforcing plates 30, 40 to the lid main body 20 and are provided at intervals along the outer periphery of the flat plate 21c and penetrate the flat plate 21c. The multiple through-holes 21f are through-holes for fixing the connecting pipe 60 to the lid main body 20 via the two reinforcing plates 30, 40 and are provided at equal intervals along the outer periphery of the through-hole 21d and penetrate the flat plate 21c.

[0020] The side plate portion 22 extends from the outer periphery of the top plate portion 21 toward the bottom plate portion 25 and is provided in an annular shape along the outer periphery of the top plate portion 21.

[0021] The connecting plate portion 23 extends inward from the end portion of the side plate portion 22 opposite to the top plate portion 21 side, and is provided in a ring shape along the end portion.

[0022] The side plate portion 24 extends from the inner periphery of the connecting plate portion 23 toward the bottom plate portion 25, and is provided in a ring shape along the inner periphery of the connecting plate portion 23. As described above, the outer surface of the side plate portion 24 is formed with a screw thread (not shown) that screws into the screw thread (not shown) formed on the inner surface of the mouth portion 1a.

[0023] The bottom plate portion 25 extends inward from the end of the side plate portion 24 opposite the connecting plate portion 23, and is provided in a ring shape along this end. The inner peripheral portion 25a of the bottom plate portion 25 is rectangular. The through hole formed by the inner peripheral portion 25a is sized so that a reinforcing plate 40 or the like can be inserted inside the lid main body 20 and fixed to the lid main body 20.

[0024] The reinforcing plate 30 has higher rigidity than the lid main body 20 and is fixed to the lid main body 20. The reinforcing plate 30 is provided parallel to the flat plate portion 21c and is fixed to the flat plate portion 21c. The reinforcing plate 30 is rectangular, and the outer periphery of the reinforcing plate 30 is provided along the outer periphery of the flat plate portion 21c. For example, the reinforcing plate 30 is formed from metal or the like. The reinforcing plate 30 has a through hole 31, a plurality of through holes 32, and a plurality of through holes 33.

[0025] The through hole 31 is a through hole through which the connecting pipe 60 is inserted, and penetrates the center of the reinforcing plate 30. The through hole 31 is provided to communicate with the through hole 21d. The multiple through holes 32 are through holes for fixing the two reinforcing plates 30, 40 to the lid main body 20, and are provided at intervals along the outer periphery of the reinforcing plate 30 and penetrate the reinforcing plate 30. The multiple through holes 32 are provided to communicate with the multiple through holes 21e. The multiple through holes 33 are through holes for fixing the connecting pipe 60 to the lid main body 20 via the two reinforcing plates 30, 40, and are provided at equal intervals along the outer periphery of the through hole 31 and penetrate the reinforcing plate 30. The multiple through holes 33 are provided to communicate with the multiple through holes 21f.

[0026] The reinforcing plate 40 has higher rigidity than the lid main body 20 and is fixed to the lid main body 20. The reinforcing plate 40 is provided parallel to the flat plate portion 21c and is fixed to the flat plate portion 21c. The reinforcing plate 40 is rectangular, and the outer periphery of the reinforcing plate 40 is provided along the outer periphery of the flat plate portion 21c. The reinforcing plate 40 is provided on the opposite side of the flat plate portion 21c from the reinforcing plate 30, and the two reinforcing plates 30, 40 are provided with the flat plate portion 21c in between. For example, the reinforcing plate 40 is formed from metal or the like. The reinforcing plate 40 has a through hole 41, a plurality of through holes 42, and a plurality of screw holes 43.

[0027] The through hole 41 is a through hole through which the connecting pipe 60 is inserted and penetrates the center of the reinforcing plate 40. The through hole 41 is provided to communicate with the through hole 21d. The multiple through holes 42 are through holes for fixing the two reinforcing plates 30, 40 to the lid main body 20 and are provided at intervals along the outer periphery of the reinforcing plate 40 and penetrate the reinforcing plate 40. The multiple through holes 42 are provided to communicate with the multiple through holes 21e. The multiple screw holes 43 are screw holes for fixing the connecting pipe 60 to the lid main body 20 via the two reinforcing plates 30, 40 and are provided at equal intervals along the outer periphery of the through hole 41 and penetrate the reinforcing plate 40. The multiple screw holes 43 are provided to communicate with the multiple through holes 21f.

[0028] The fastener 50 has a plurality of sets of a bolt 51, a washer 52, a washer 53, and a nut 54. In each set, the bolt 51 is inserted from the reinforcing plate 30 side through the washer 52, the through hole 32, the through hole 21e, the through hole 42, and the washer 53 in that order, and is screwed into the nut 54 from the reinforcing plate 40 side to be tightened. In this way, the reinforcing plate 30 and the reinforcing plate 40 are fixed to the lid main body 20.

[0029] One end of connecting pipe 60 (one end of first pipe portion 61) is connected to ball tap 80 so as to communicate with ball tap 80, and is fixed to lid body 20 via reinforcing plates 30, 40. When lid body 20 is attached to tank 1, the other end of connecting pipe 60 (the other end of third pipe portion 63) is connected to supply pipe 2 so as to communicate with supply pipe 2, and a piping formed by connecting connecting pipe 60 and supply pipe 2 (a piping including connecting pipe 60 and supply pipe 2) is provided so as to penetrate lid body 20 and extend from the outside of tank 1 to the inside of tank 1. Specifically, when lid body 20 is attached to tank 1 and connecting connecting pipe 60 and supply pipe 2, the piping formed by connecting connecting pipe 60 and supply pipe 2 extends from the outside of tank 1 toward lid body 20, penetrates lid body 20, extends to the inside of tank 1, and is connected to ball tap 80 inside tank 1. In this embodiment, the connecting pipe 60 is provided so as to penetrate the lid main body 20 (flat plate portion 21c, etc.) and the reinforcing plates 30, 40. The connecting pipe 60 has a first pipe portion 61, a second pipe portion 62, a third pipe portion 63, a flange portion 64, and a plurality of through holes 65.

[0030] The first pipe 61 is curved so that the angle between the direction in which one end of the first pipe 61 opens and the direction in which the other end of the first pipe 61 opens is 90 degrees. One end of the first pipe 61 is connected to the ball tap 80 so that the first pipe 61 and the ball tap 80 are in communication with each other. For example, the one end of the first pipe 61 is connected to the ball tap 80 by being screwed onto the ball tap 80. The first pipe 61 is arranged to be located inside the tank 1 when the lid body 20 is attached to the tank 1.

[0031] One end of the second pipe portion 62 is connected to the other end of the first pipe portion 61 so as to communicate with the first pipe portion 61. For example, one end of the second pipe portion 62 is connected to the other end of the first pipe portion 61 by being screwed to the other end of the first pipe portion 61.

[0032] One end of the third pipe portion 63 is connected to the other end of the second pipe portion 62 so that the second pipe portion 62 and the third pipe portion 63 are in communication with each other. For example, one end of the third pipe portion 63 is connected to the other end of the second pipe portion 62 by being screwed into the other end of the second pipe portion 62. The other end of the third pipe portion 63 is connected to one end of the supply pipe 2 so that the third pipe portion 63 and the supply pipe 2 are in communication with each other. For example, the other end of the third pipe portion 63 is connected to one end of the supply pipe 2 by being screwed into the one end of the supply pipe 2. The third pipe portion 63 is formed to have a size that allows it to be inserted through the through hole 21d, the through hole 31, and the through hole 41.

[0033] In this manner, the connecting pipe 60 is configured by connecting the first pipe section 61, the second pipe section 62, and the third pipe section 63.

[0034] The flange portion 64 protrudes outward from the other end of the third pipe portion 63 and is provided in an annular shape along the other end of the third pipe portion 63. The diameter of the flange portion 64 is larger than the diameter of the through hole 31, and the flange portion 64 is provided so as to contact the main surface of the reinforcing plate 30 on the side opposite to the flat plate portion 21c side.

[0035] The multiple through holes 65 are for fixing the connecting pipe 60 to the lid body 20 via the reinforcing plates 30 and 40, and are provided at equal intervals along the outer periphery of the flange portion 64, penetrating the flange portion 64. The multiple through holes 65 are provided so as to communicate with the multiple through holes 63. The multiple through holes 65 are tapered partway.

[0036] The fastener 70 has a plurality of bolts 71. Each bolt 71 is inserted through the through hole 65, the through hole 33, and the through hole 21f in that order, and is screwed into the screw hole 43 and tightened. This fixes the connecting pipe 60 to the lid main body 20 via the reinforcing plates 30 and 40.

[0037] Ball tap 80 is provided so as to be located inside tank 1 when lid body 20 is attached to tank 1. When lid body 20 is attached to tank 1, ball tap 80 supplies liquid supplied from supply pipe 2 via connecting pipe 60 to tank 1 when the level of liquid stored in tank 1 is below predetermined liquid level A, and does not supply liquid supplied from supply pipe 2 via connecting pipe 60 to tank 1 when the level of liquid stored in tank 1 is equal to predetermined liquid level A. Ball tap 80 has a main body 81, a float ball 82, an arm 83, and a valve body 84.

[0038] The main body 81 is connected to one end of the first pipe portion 61 and communicates with the first pipe portion 61 .

[0039] The float ball 82 is formed so as to float in the liquid stored in the tank 1, and moves up and down depending on the liquid level.

[0040] The arm 83 is rotatably attached to the main body 81. One end of the arm 83 is attached to the float ball 82. The other end of the arm 83 is connected to the valve body 84. The arm 83 rotates relative to the main body 81 as the float ball 82 moves.

[0041] Valve element 84 is provided movably inside main body 81. Valve element 84 is connected to the other end of arm 83, and moves inside main body 81 as arm 83 rotates. When the liquid level stored in tank 1 is below predetermined liquid level A, valve element 84 is located at an open position that opens the flow path formed inside main body 81, and liquid supplied from supply pipe 2 via connecting pipe 60 flows out of main body 81 and is supplied to tank 1 (see the thick solid arrow in FIG. 4). On the other hand, when the liquid level stored in tank 1 is at predetermined liquid level A (see the two-dot chain line in FIG. 4), valve element 84 is located at a closed position that closes the flow path formed inside main body 81, and liquid supplied from supply pipe 2 via connecting pipe 60 does not flow out of main body 81 and is not supplied to tank 1.

[0042] As described above, the lid body 10 in the embodiment of the present invention comprises the lid body 20 attached to the tank 1 so as to close the opening of the tank 1, the reinforcing plate 30 (40) which is more rigid than the lid body 20 and is fixed to the lid body 20, the ball tap 80 which is provided so as to be positioned inside the tank 1 when the lid body 20 is attached to the tank, and the connecting pipe 60 which has one end connected to the ball tap 80 so as to communicate with the ball tap 80 and is fixed to the lid body 20 via the reinforcing plate 30 (40), and when the lid body 20 is attached to the tank 1, and a connecting pipe 60, the other end of which is connected to the supply pipe 2 so as to communicate with the supply pipe 2 provided in the tank 1, and the piping formed by connecting the connecting pipe 60 to the supply pipe 2 penetrates the lid body 20 and extends from the outside of the tank 1 to the inside of the tank 1. When the lid body 20 is attached to the tank 1, the ball tap 80 supplies the liquid supplied from the supply pipe 2 through the connecting pipe 60 to the tank 1 if the level of the liquid stored in the tank 1 is below a predetermined liquid level A, and does not supply the liquid supplied from the supply pipe 2 through the connecting pipe 60 to the tank 1 if the level of the liquid stored in the tank 1 is the predetermined liquid level A.

[0043] According to this, by attaching the lid body 10 to the tank 1 and connecting the connecting pipe 60 to the supply pipe 2, when the level of the liquid stored in the tank 1 is below a predetermined liquid level A, the liquid supplied from the supply pipe 2 via the connecting pipe 60 can be supplied to the tank 1, and when the level of the liquid stored in the tank 1 is at the predetermined liquid level A, the liquid supplied from the supply pipe 2 via the connecting pipe 60 can be prevented from being supplied to the tank 1. Furthermore, since the connecting pipe 60 to which the ball tap 80 is connected is fixed to the lid body 20 via the reinforcing plate 30 (40), the ball tap 80 can be provided inside the tank 1 while preventing the lid body 20 from being damaged.

[0044] Furthermore, in the lid body 10 in the embodiment of the present invention, the lid main body 20 has a top plate portion 21, which has a flat plate portion 21c in the center of the top plate portion 21, and the reinforcing plate 30 (40) is arranged parallel to the flat plate portion 21c and fixed to the flat plate portion 21c.

[0045] This allows the flat plate portion 21c to be reinforced more strongly, so that the ball tap 80 can be provided inside the tank 1 while further preventing the lid body 20 from being damaged.

[0046] In the lid 10 according to the embodiment of the present invention, the top surface of the top plate 21 has a recess, and the flat plate 21c forms the bottom surface of the recess.

[0047] This can prevent the reinforcing plate 30 (40) from protruding outward, and prevent the lid body 10 from becoming larger.

[0048] Furthermore, the cover 10 in this embodiment of the present invention includes two reinforcing plates 30 and 40 that are provided on either side of the flat plate portion 21c.

[0049] This allows the flat plate portion 21c to be further reinforced, so that the ball tap 80 can be provided inside the tank 1 while further preventing the lid body 20 from being damaged.

[0050] In the cover 10 according to the embodiment of the present invention, the connecting pipe 60 is provided so as to penetrate the flat plate portion 21c and the reinforcing plate 30 (40).

[0051] This makes it easier to expose the other end of the connecting pipe 60 to the outside when the lid body 20 is attached to the tank 1, making it easier to connect the supply pipe 2 to the other end of the connecting pipe 60.

[0052] Although the embodiments of the present invention have been described above, they are merely illustrative examples and do not limit the present invention, and the specific configurations, etc. can be appropriately modified in design. Furthermore, the actions and effects described in the embodiments of the invention are merely a list of the most preferable actions and effects resulting from the present invention, and the actions and effects of the present invention are not limited to those described in the embodiments of the present invention.

[0053] In the above embodiment, the lid body 20 is attached to the tank 1 by screwing into a thread formed on the inner surface of the mouth 1a, but this is not limiting. For example, the lid body may be attached to the tank by screwing into a thread formed on the outer surface of the mouth.

[0054] In the above embodiment, the flat plate portion 21c, the reinforcing plate 30, and the reinforcing plate 40 are rectangular, but are not limited thereto. For example, the flat plate portion, the reinforcing plate, and the reinforcing plate may be circular or the like.

[0055] In the above embodiment, the top plate 21 has the flat plate portion 21a, the protruding portion 21b, and the flat plate portion 21c, but this is not limiting. For example, the entire top plate may be flat. In this case, the flat plate portion may be a portion located in the center of the top plate. Furthermore, the inner periphery of the protruding portion does not have to bend toward the bottom plate portion, and the flat plate portion does not have to form the bottom surface of the recess.

[0056] In the above embodiment, the reinforcing plates 30, 40 are provided parallel to the flat plate portion 21c and fixed to the flat plate portion 21c, but this is not limiting. For example, the top plate may have a curved portion at the center of the top plate, and the reinforcing plates may be provided along the curved portion and fixed to the curved portion. Furthermore, the reinforcing plates may be fixed to a portion of the top plate other than the center, or may be fixed to the bottom plate, etc.

[0057] In the above embodiment, the two reinforcing plates 30, 40 are provided with the flat plate portion 21c sandwiched between them, but this is not limiting. For example, only one of the two reinforcing plates 30, 40 may be provided. The two reinforcing plates may be provided with a portion of the top plate other than the center portion sandwiched between them, or may be provided with the bottom plate portion sandwiched between them.

[0058] In the above embodiment, the connecting pipe 60 is provided so as to penetrate the lid body 20 (flat plate portion 21c, etc.) and the reinforcing plates 30, 40, but this is not limiting. For example, the connecting pipe may be fixed to the lid body in a state where it is inserted partway into the lid body from the bottom plate side of the lid body. In this case, the supply pipe may be inserted into the lid body from the top plate side of the lid body and connected to the connecting pipe.

[0059] In the above embodiment, the connecting pipe 60 is configured by connecting the first pipe section 61, the second pipe section 62, and the third pipe section 63, but is not limited to this. For example, the connecting pipe may be configured by one pipe section instead of multiple pipe sections. [Explanation of symbols]

[0060] 1 tank 1a Mouth 2 Supply pipe 3 Discharge pipe 10 Lid 20 Lid body 21 Top plate 21a Flat plate part 21b Projection 21c Flat plate part 21d,21e,21f,31,32,33,41,42,65 Through hole 22,24 Side plate part 23 Connecting plate part 25 Bottom plate part 25a Inner circumference 30,40 Reinforcement plate 43 screw holes 50,70 Fasteners 51.71 volts 52,53 Washer 54 Nut 60 Connecting pipe 61 First Pipe Section 62 Second Pipe Section 63 Third Pipe Section 64 Flange 80 Ball Tap 81 Main Unit 82 Float 83 Arm 84 Valve body A specified liquid level

Claims

1. a lid body attached to the tank so as to close an opening of the tank; a reinforcing plate having higher rigidity than the lid body and fixed to the lid body; a ball tap provided so as to be positioned inside the tank when the lid body is attached to the tank; a connecting pipe having one end connected to the ball tap so as to communicate with the ball tap and fixed to the lid body via the reinforcing plate, the other end connected to a supply pipe provided outside the tank so as to communicate with the supply pipe for supplying liquid to the tank when the lid body is attached to the tank, and a piping formed by connecting the connecting pipe and the supply pipe penetrates the lid body and extends from the outside of the tank to the inside of the tank, The ball tap is a lid body characterized in that, when the lid body is attached to the tank, if the level of the liquid stored in the tank is below a predetermined level, the ball tap supplies the liquid supplied from the supply pipe to the tank via the connecting pipe, and if the level of the liquid stored in the tank is at the predetermined level, the ball tap does not supply the liquid supplied from the supply pipe to the tank via the connecting pipe.

2. The lid body has a top plate portion, the top plate portion has a flat plate portion at a central portion of the top plate portion, The cover according to claim 1 , wherein the reinforcing plate is provided parallel to the flat plate portion and fixed to the flat plate portion.

3. The top surface of the top plate has a recess, The lid according to claim 2 , wherein the flat portion forms a bottom surface of the recess.

4. 4. The lid according to claim 2, further comprising two reinforcing plates disposed on either side of the flat plate portion.

5. 4. The cover according to claim 2, wherein the connecting pipe is provided so as to penetrate through the flat plate portion and the reinforcing plate.

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