JP6308015B2 - Electrode cover - Google Patents

Description

  The present invention relates to an electrode cover, and more particularly to an electrode cover of an electrode capable of detecting a liquid level in a storage tank.

  2. Description of the Related Art Conventionally, a technique for detecting the liquid level of a storage tank such as a neutralizer, a drain tank, or a heat medium tank in a heat source device with an electrode is known. As a technique for detecting the liquid level of the storage tank with an electrode, for example, the storage tank is detected by detecting electrical continuity between the electrodes due to the liquid in the storage tank coming into contact with a plurality of electrodes inserted in the storage tank. Some of them detect the liquid level.

  In this technique, when the dew condensation generated in the heat source unit contacts the electrodes and the electrodes are electrically connected outside the storage tank, the electrodes are short-circuited and the liquid level in the storage tank is erroneously detected.

  In order to prevent such a short circuit between the electrodes, there is a method of providing an electrode cover above the electrodes. For example, Japanese Patent Laying-Open No. 2011-80858 (Patent Document 1) discloses an electrode cover that covers an electrode of a full water detector that can be installed in an outdoor pump. This electrode cover is made of stainless steel.

JP 2011-80858 A

  In the method of providing the electrode cover above the electrode, it is necessary to remove the electrode cover when inspecting the electrode. However, since the heat source device is made compact, it is difficult to secure a sufficient space for removing the electrode cover in the heat source device.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an electrode cover that can suppress dew condensation from contacting the electrode and can inspect the electrode in a small space. It is.

  The electrode cover of the present invention is an electrode cover of an electrode that extends from the outside to the inside of the storage tank provided with an opening and can detect the liquid level in the storage tank. The electrode cover includes a cover part and a tongue piece part. A cover part is for covering an electrode in the exterior of a storage tank. The tongue piece portion extends from the cover portion and can be inserted into the opening. At least one of the cover portion and the tongue piece portion includes a first locking portion and a second locking portion. The first locking portion can be locked to the end portion on the cover portion side of the storage tank portion around the opening in a state where the tongue piece portion is inserted into the opening. The second locking portion is disposed closer to the cover portion than the first locking portion, and the end portion on the cover portion side of the portion of the storage tank around the opening is in a state where the tongue piece portion is inserted into the opening. It can be locked.

  According to the electrode cover of the present invention, it is possible to prevent condensation from coming into contact with the electrode by covering the electrode outside the storage tank. In addition, with the tongue piece inserted into the opening, the first locking part is locked to the end on the cover part side of the portion of the storage tank around the opening, so that the cover part, the neutralizer, The electrode is exposed from between. For this reason, an electrode can be inspected by connecting an inspection instrument to the electrode from between the cover portion and the neutralizer. And since the electrode can be inspected by moving the tongue piece from the state where the second locking portion is locked to the state where the first locking portion is locked, the electrode cover is attached. The electrode can be inspected in the state. Therefore, the electrode can be inspected in a smaller space than when the electrode cover is removed.

  In the above electrode cover, the tongue piece portion includes a narrow portion having a gap with the inner peripheral surface of the opening in the entire periphery of the opening in a state where the tongue piece portion is inserted into the opening. Accordingly, since the narrow portion does not come into contact with the inner peripheral surface of the opening in a state where the tongue piece is inserted into the opening, the tongue piece can be moved smoothly.

  In the above electrode cover, the tongue piece portion is disposed on the opposite side to the cover portion side with respect to the first locking portion, and in the state where the tongue piece portion is inserted into the opening, Of these, a third locking portion that can be locked to the end opposite to the cover portion side, and a second locking portion that is disposed on the opposite side of the cover portion side, and the tongue piece portion is inserted into the opening And a fourth locking portion that can be locked to the end portion on the opposite side of the cover portion side of the portion of the storage tank around the opening. For this reason, it can suppress that a tongue piece part falls out from an opening to the cover part side by latching a 3rd latching | locking part to an edge part, and a 4th latching | locking part latches to an edge part. By doing so, it is possible to suppress the tongue piece from coming out of the opening toward the cover.

  In said electrode cover, a tongue piece part contains the knob | pick part provided in the opposite side to the cover part side with respect to the 1st latching | locking part. For this reason, the tongue piece can be operated by picking the knob. Therefore, it is easy to operate the tongue piece.

  In said electrode cover, the tongue piece part is comprised with the flexible resin board. Therefore, the tongue piece portion is easily deformed. For this reason, by deforming the first locking portion and inserting it into the opening, the tongue piece portion is changed from the state where the first locking portion is locked to the state where the second locking portion is locked. Easy to move.

  As described above, according to the present invention, it is possible to provide an electrode cover that can suppress a short circuit between electrodes due to condensation and can inspect the electrodes in a small space.

It is the schematic which shows the structure of the heat-source equipment in one embodiment of this invention. It is a schematic perspective view which shows the state in which the electrode cover in one embodiment of this invention was attached to the neutralizer. It is a schematic perspective view which shows the electrode cover in one embodiment of this invention. It is a schematic perspective view which shows the neutralizer in one embodiment of this invention. It is a schematic perspective view which shows the state by which the 1st latching | locking part of the electrode cover in one embodiment of this invention was latched by the neutralizer. It is a schematic plan view for demonstrating the state by which the 1st latching | locking part and 2nd latching | locking part of the electrode cover in one embodiment of this invention were latched by the neutralizer. It is a schematic end view which shows the state by which the narrow part of the tongue piece part of the electrode cover in one embodiment of this invention was inserted in opening.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, the structure of the heat source machine in one embodiment of the present invention will be described. Hereinafter, a neutralizer will be described as an example of the storage tank of the heat source machine of the present embodiment. In the following, each direction is based on the state where the heat source device is installed on the floor.

  With reference to FIG. 1, the heat source machine in this Embodiment is the housing | casing 1, the combustion apparatus 2, the air blower 3, the primary heat exchanger 4, the secondary heat exchanger 5, and the neutralizer ( Storage tank) 6, electrode 7, controller 8, hot water supply path 9, and electrode cover 10.

  The housing 1 has a bottom surface (lower surface) 1a, a top surface (upper surface) 1b, a side surface 1c, a front surface and a back surface (not shown), and has an internal space IS surrounded by these surfaces. In this internal space IS, the combustion device 2, the blower 3, the primary heat exchanger 4, the secondary heat exchanger 5, the neutralizer 6, the electrode 7, the control unit 8, the hot water supply path 9, and the electrode cover 10 are accommodated. Yes.

  The combustion device 2 is for supplying combustion gas. This combustion gas is for exchanging heat between the primary heat exchanger 4 and the secondary heat exchanger 5. The combustion device 2 is disposed at the center in the height direction of the heat source machine. The combustion device 2 is a burner, for example.

  The blower 3 is for supplying combustion air to the combustion device 2. The blower 3 is arranged on the bottom surface 1a side (lower side) with respect to the combustion device 2. Moreover, the air blower 3 is arrange | positioned rather than the primary heat exchanger 4 and the secondary heat exchanger 5 at the bottom face 1a side. The blower 3 is a fan, for example.

  The primary heat exchanger 4 is for recovering sensible heat of the combustion gas supplied by the combustion device 2. The secondary heat exchanger 5 is for recovering the latent heat of the combustion gas supplied by the combustion device 2. The primary heat exchanger 4 and the secondary heat exchanger 5 are connected to each other. The primary heat exchanger 4 is disposed below the secondary heat exchanger 5. Further, the primary heat exchanger 4 and the secondary heat exchanger 5 are disposed on the upper surface 1b side (upper side) of the combustion device 2. Each of the primary heat exchanger 4 and the secondary heat exchanger 5 has a heat transfer tube capable of circulating a fluid to be heated and a case capable of accommodating the heat transfer tube.

  The combustion gas after heat exchange in the primary heat exchanger 4 is passed to the secondary heat exchanger 5 so that the water (heated fluid) in the secondary heat exchanger 4 is preheated. In this process, the temperature of the combustion gas is lowered to about 60 ° C., whereby moisture contained in the combustion gas is condensed and latent heat is recovered. Then, drainage is generated by collecting the latent heat of the combustion gas.

  The neutralizer 6 is for neutralizing the drain generated by recovering the latent heat of the combustion gas in the secondary heat exchanger 5. The neutralizer 6 is disposed between the combustion device 2 and the side surface 1c. The neutralizer 6 is disposed closer to the bottom surface 1a (lower side) than the secondary heat exchanger 5.

  The drain receiver DR is disposed below the secondary heat exchanger 5 and configured to receive the drain generated in the secondary heat exchanger 5. The drain received by the drain receiver DR becomes acidic because nitrogen oxides in the exhaust gas are dissolved therein. The first drain pipe DP1 connects the drain receiver DR and the neutralizer 6. The acidic drain is sent from the drain receiver DR to the neutralizer 6 through the first drain pipe DP1.

  The neutralizer 6 is filled with a neutralizing agent, and acidic drainage can be neutralized by the neutralizing agent. The second drain pipe DP2 connects the neutralizer 6 and the drain outlet DO. The drain neutralized by the neutralizer 6 is discharged out of the housing 1 from the drain outlet DO through the second drain pipe DP2.

  Two electrodes 7 are provided on the top surface (upper surface) of the neutralizer 6. These electrodes 7 are configured to detect the liquid level in the neutralizer 6. These electrodes 7 extend from the outside of the neutralizer 6 to the inside. These electrodes 7 are configured to be able to conduct each other by contacting the drain in the neutralizer 6. These electrodes 7 are electrically connected to the control unit 8 by electric wiring.

  The control unit 8 is configured to be able to detect drain in the neutralizer 6. The control unit 8 detects the drain in the neutralizer 6 based on an electric signal indicating that the two electrodes 7 are brought into conduction with each other by contacting the drain.

  The hot water supply path 9 is for supplying hot water that has been heat-exchanged with the combustion gas in the primary heat exchanger 4 and the secondary heat exchanger 5 to the outside of the heat source unit. The hot water supply path 9 has a water supply pipe 9a, a hot water supply pipe 9b, a water inlet IW, and a hot water outlet OW. The water supply pipe 9a is configured to be able to supply water as a fluid to be heated to the secondary heat exchanger 5 from the water inlet IW. The hot water supply pipe 9b connects the primary heat exchanger 4 and the hot water outlet OW. The hot water supply pipe 9b is configured to be able to supply hot water heated by the primary heat exchanger 4 and the secondary heat exchanger 5 from the primary heat exchanger 4 to the hot water outlet OW. Thereby, when the water supplied from the water inlet IW passes through the secondary heat exchanger 5 and the primary heat exchanger 4, it is heated by the combustion gas and supplied from the hot water outlet OW.

  With reference to FIG. 1 and FIG. 2, the neutralizer 6 has a receiving part 6I and a discharge part 60. The receiving portion 6I is formed on the top surface (upper surface) of the neutralizer 6. The receiving part 6I is connected to the first drain pipe DP1. The drain flows into the neutralizer 6 from the receiving portion 6I through the first drain pipe DP1. The discharge part 60 is formed at the center of the neutralizer 6. The discharge part 60 is connected to the second drain pipe DP2. The drain that has flowed into the neutralizer 6 flows into the second drain pipe DP2 from the discharge portion 6O.

  Further, the neutralizer 6 has a flange portion 6 a at the outer edge of the neutralizer 6. The flange portion 6a has an opening OP that penetrates in a direction in which the top surface (upper surface) and the bottom surface (lower surface) of the neutralizer 6 face each other.

  An electrode cover 10 is attached to the top surface (upper surface) of the neutralizer 6. The electrode cover 10 covers the electrode 7 to prevent condensation from coming into contact with the electrode 7. The electrode cover 10 includes a cover part 11, a tongue piece part 12, and an extending part 13. The cover part 11, the tongue piece part 12, and the extending part 13 are integrally formed.

  The cover part 11 covers the two electrodes 7. The tongue piece 12 is arranged on the outer edge side of the neutralizer 6. The tongue piece portion 12 extends from the cover portion 11. The tongue piece 12 is inserted into the opening OP of the neutralizer 6. The extending portion 13 is disposed on the opposite side of the tongue piece portion 12 with respect to the cover portion 11. The extending part 13 extends obliquely downward from the upper end of the cover part 11. Further, the extending portion 13 extends along the top surface (upper surface) of the neutralizer 6.

  With reference to FIGS. 3 and 4, the cover portion 11 is for covering the electrode 7 outside the neutralizer 6. The cover part 11 has a top plate part 11a and a side plate part 11b. The top plate portion 11 a and the side plate portion 11 b are configured to surround the two electrodes 7. The top plate portion 11 a is disposed so as to be located above the two electrodes 7, and the side plate portion 11 b is disposed so as to be located on the side of the two electrodes 7.

  The tongue piece portion 12 extends downward from the lower end of the cover portion 11. The tongue piece 12 is configured to be insertable into the opening OP. The opening OP is configured to be able to pass through the tongue piece 12. In the present embodiment, the opening OP is a through hole. Note that the opening OP is not limited to the through hole, and may be a notch in which a part of the periphery is opened. The opening OP has a rectangular planar shape.

  At least one of the cover portion 11 and the tongue piece portion 12 includes a first locking portion 10a and a second locking portion 10b. In the present embodiment, the first locking portion 10 a is provided on the tongue piece portion 12, and the second locking portion 10 b is provided on the cover portion 11. The first locking portion 10a is locked to the end portion 6b on the cover portion 11 side in the portion of the neutralizer 6 around the opening OP in a state where the tongue piece portion 12 is inserted into the opening OP of the neutralizer 6. It is configured to be possible. The 2nd latching | locking part 10b is arrange | positioned rather than the 1st latching | locking part 10a at the cover part 11 side. The second locking portion 10b is locked to the end portion 6b on the cover portion 11 side of the portion of the neutralizer 6 around the opening OP in a state where the tongue piece portion 12 is inserted into the opening OP of the neutralizer 6. Is possible.

  The tongue piece 12 has a main body 12a and a knob 12b. The main body portion 12a is disposed between the cover portion 11 and the knob portion 12b. The knob portion 12b is provided on the side opposite to the cover portion 11 side with respect to the first locking portion 10a.

  The tongue piece 12 includes a third locking portion 10c and a fourth locking portion 10d. The 3rd latching | locking part 10c is arrange | positioned with respect to the 1st latching | locking part 10a on the opposite side to the cover part 11 side. The third locking portion 10c has an end portion 6c opposite to the cover portion 11 side in the portion of the neutralizer 6 around the opening OP in a state where the tongue piece portion 12 is inserted into the opening OP of the neutralizer 6. It is configured to be able to be locked. The 4th latching | locking part 10d is arrange | positioned with respect to the 2nd latching | locking part 10b on the opposite side to the cover part 11 side. The fourth locking portion 10d has an end portion 6c opposite to the cover portion 11 side in the portion of the neutralizer 6 around the opening OP in a state where the tongue piece portion 12 is inserted into the opening OP of the neutralizer 6. It is configured to be able to be locked.

  The tongue piece 12 is made of a flexible resin plate. The thickness dimension of the tongue piece 12 is not less than 0.25 mm and not more than 0.5 mm. The material of the tongue piece 12 is polycarbonate, for example. Further, the material of the tongue piece 12 may be vinyl chloride, polyphenylene ether, polyester or the like. Moreover, not only the tongue piece part 12 but the electrode cover 10 whole may be comprised with the flexible resin board. In this case, the electrode cover 10 may be formed by bending a flexible resin plate.

  The extending portion 13 has a through hole 13a that penetrates in a direction in which the top surface (upper surface) and the bottom surface (lower surface) of the neutralizer 6 face each other. The through-hole 13a is configured so that the receiving portion 6I of the neutralizer 6 can be inserted. When the receiving portion 6I is inserted into the through hole 13a and the extending portion 13 is locked to the receiving portion 6I, the extending portion 13 is held by the receiving portion 6I. In addition, the diameter of the tip of the receiving part 6I is larger than the diameter of the root part. For this reason, it is suppressed that the receiving part 6I slips out from the through hole 13a to the root part side.

  Next, the usage state of the electrode cover 10 of this Embodiment is demonstrated. The electrode cover 10 of the present embodiment can be fixed at two fixed positions, a temporary fixed position and a completely fixed position.

  First, the temporary fixing position will be described with reference to FIGS. 5 and 6. In FIG. 6, the first to fourth locking portions 10 a to 10 d of the electrode cover 10, the opening OP of the neutralizer 6, and the end portions 6 b and 6 c at the temporary fixing position and the complete fixing position, respectively. The positional relationship is shown.

  In the temporarily fixed position, the tongue piece 12 is inserted into the opening OP of the neutralizer 6, and the first locking portion 10a is the end of the neutralizer 6 around the opening OP on the cover 11 side. Locked to the portion 6b. The width dimension A of the first locking portion 10a is larger than the width dimension B of the opening OP. The width dimension A is, for example, 21.7 mm to 22.3 mm, and the width dimension B is, for example, 19.8 mm to 20.2 mm (please replenish). For this reason, the 1st latching | locking part 10a contact | abuts to the edge part 6b by the side of the cover part 11 among the parts of the neutralizer 6 around the opening OP.

  In the temporarily fixed position, the electrode 7 is exposed from the lower end of the cover portion 11. That is, the electrode 7 is exposed from between the cover portion 11 and the flange portion 6a. For this reason, when inspecting the electrode 7, the electrode 7 can be inspected by connecting the inspection instrument to the electrode 7 from between the lower end of the cover portion 11 and the flange portion 6a. In the temporarily fixed state, it is preferable that the connection portion of the electrode 7 is exposed from between the lower end of the cover portion 11 and the flange portion 6a.

  In the present embodiment, in the temporarily fixed position, the third locking portion 10c is included in the portion of the neutralizer 6 around the opening OP with the tongue piece 12 inserted into the opening OP of the neutralizer 6. It is locked to the end 6c opposite to the cover 11 side. The width dimension C of the third locking portion 10c is larger than the width dimension B of the opening OP. The width dimension C is, for example, 21.7 mm or more and 22.3 mm or less (please replenish). For this reason, the 3rd latching | locking part 10c contact | abuts the edge part 6c on the opposite side to the cover part 11 side among the parts of the neutralizer 6 around the opening OP. Therefore, it is suppressed that the tongue piece part 12 slips out from the opening OP of the neutralizer 6 to the cover part 11 side.

  Moreover, the thickness dimension of the flange part 6a may be below the dimension between the 1st latching | locking part 10a and the 3rd latching | locking part 10c. In this case, the flange portion 6a is sandwiched and fixed by the first locking portion 10a and the third locking portion 10c. For this reason, the electrode cover 10 can be firmly fixed at the temporary fixing position.

  Referring to FIG. 7, in the present embodiment, tongue piece 12 includes a narrow portion NP. The narrow portion NP is configured to have a gap with the inner peripheral surface of the opening OP in the entire periphery of the opening OP in a state where the tongue piece portion 12 is inserted into the opening OP of the neutralizer 6. That is, there is a gap between the inner peripheral surface of the opening OP and the narrow portion NP in both the width direction and the thickness direction of the narrow portion NP.

  Subsequently, the complete fixing position will be described with reference to FIGS. 1 and 6 again. In the fully fixed position, the tongue 12 is inserted into the opening OP of the neutralizer 6, and the second locking portion 10b is the end of the neutralizer 6 around the opening OP on the cover 11 side. Locked to the portion 6b. Similar to the width dimension A of the first locking part 10a, the width dimension of the second locking part 10b is larger than the width dimension of the opening OP. For this reason, the 2nd latching | locking part 10b contact | abuts to the edge part 6b by the side of the cover part 11 among the parts of the neutralizer 6 around the opening OP.

  In the completely fixed position, the electrode 7 is covered with the cover portion 11. Moreover, the electrode 7 is not exposed from between the lower end of the cover part 11 and the flange part 6a. For this reason, it is suppressed that condensation contacts the electrode 7. Even if there is a slight gap between the lower end of the cover portion 11 and the flange portion 6 a, it is sufficient that condensation does not enter and contact the electrode 7 through the gap.

  In the present embodiment, in the state where the tongue piece 12 is inserted into the opening OP of the neutralizer 6 in the completely fixed position, the fourth locking portion 10d is included in the portion of the neutralizer 6 around the opening OP. It is locked to the end 6c opposite to the cover 11 side. Similar to the width C of the third locking portion 10c, the width of the fourth locking portion 10d is larger than the width of the opening OP. For this reason, the 4th latching | locking part 10d contact | abuts the edge part 6c on the opposite side to the cover part 11 side among the parts of the neutralizer 6 around the opening OP. Therefore, it is suppressed that the tongue piece part 12 slips out from the opening OP of the neutralizer 6 to the cover part 11 side.

  Moreover, the thickness dimension of the flange part 6a may be below the dimension between the 2nd latching | locking part 10b and the 4th latching | locking part 10d. In this case, the flange portion 6a is sandwiched and fixed by the second locking portion 10b and the fourth locking portion 10d. For this reason, the electrode cover 10 can be firmly fixed in the complete fixing position.

Next, the effect of the electrode cover of this Embodiment is demonstrated.
According to the electrode cover 10 of the present embodiment, the cover portion 11 covers the electrode 7 outside the neutralizer 6, so that dew condensation can be prevented from contacting the electrode 7. Further, the first locking portion 10a is locked to the end portion 6b on the cover portion 11 side in the portion of the neutralizer 6 around the opening OP of the neutralizer 6 with the tongue piece portion 12 being inserted into the opening. As a result, the electrode 7 is exposed from between the cover portion 11 and the flange portion 6a of the neutralizer 6. For this reason, it is possible to inspect the electrode 7 by connecting an inspection instrument to the electrode 7 from between the cover portion 11 and the flange portion 6 a of the neutralizer 6. And since the electrode 7 can be inspected by moving the tongue piece from the state where the second locking portion 10b is locked to the state where the first locking portion 10a is locked, the electrode cover The electrode 7 can be inspected with 10 attached. Therefore, the electrode 7 can be inspected in a smaller space than when the electrode cover 10 is removed.

  Moreover, since the electrode 7 can be detected without removing the electrode cover 10, it is possible to prevent the electrode cover 10 from being forgotten to be attached after the inspection or the electrode cover 10 from being lost.

  In the electrode cover 10 of the present embodiment, since the narrow portion NP does not contact the inner peripheral surface of the opening OP in a state where the tongue piece 12 is inserted into the opening OP of the neutralizer 6, the tongue piece 12 Can be moved smoothly.

  In the electrode cover 10 of the present embodiment, the third locking portion 10c is locked to the end portion 6c, so that the tongue piece portion 12 comes out from the opening OP of the neutralizer 6 to the cover portion 11 side. It can suppress, and it can suppress that the tongue piece part 12 slips out from the opening OP of the neutralizer 6 to the cover part 11 side because the 4th latching | locking part 10d is latched by the edge part 6c. .

  In the electrode cover 10 of the present embodiment, the tongue piece 12 can be operated by pinching the knob 12b. Therefore, it is easy to operate the tongue piece 12.

  In the electrode cover 10 of the present embodiment, since the tongue piece 12 is formed of a flexible resin plate, the tongue piece 12 is easily deformed. Therefore, by deforming the first locking portion 10a and inserting it into the opening, the tongue is changed from the state where the first locking portion 10a is locked to the state where the second locking portion 10b is locked. It is easy to move the piece 12.

  In addition, although the neutralizer 6 was demonstrated as an example of the storage tank of the heat source apparatus of this Embodiment above, the storage tank of this Embodiment is not limited to the neutralizer 6, A drain tank, a heat-medium tank It may be.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 1 Case, 2 Combustion device, 3 Blower, 4 Primary heat exchanger, 5 Secondary heat exchanger, 6 Neutralizer, 6I receiving part, 6O discharge part, 6a Flange part, 6b, 6c edge part, 7 electrode , 8 control unit, 9 hot water supply path, 10 electrode cover, 10a first locking unit, 10b second locking unit, 10c third locking unit, 10d fourth locking unit, 11 cover unit, 11a Top plate portion, 11b side plate portion, 12 tongue piece portion, 12a body portion, 12b knob portion, 13 extension portion, 13a through hole, NP narrow portion, OP opening.

Claims (5)

An electrode cover of an electrode that extends from the outside to the inside of the storage tank provided with an opening, and that can detect the liquid level in the storage tank,
A cover for covering the electrode outside the storage tank;
A tongue piece extending from the cover and insertable into the opening;
At least one of the cover part and the tongue piece part is:
A first locking portion that can be locked to an end portion on the cover portion side of the storage tank portion around the opening in a state where the tongue piece portion is inserted into the opening;
It is arranged closer to the cover part than the first locking part, and the tongue piece part is engaged with the end part on the cover part side of the storage tank portion around the opening in a state where the tongue piece part is inserted into the opening. An electrode cover including a second locking portion that can be stopped.   The said tongue piece part contains a narrow part which has a clearance gap between the inner peripheral surface of the said opening in the perimeter of the said opening in the state in which the said tongue piece part was inserted in the said opening. Electrode cover. The tongue piece is
The first locking portion is disposed on the side opposite to the cover portion side, and the tongue piece portion is inserted into the opening, and the portion of the storage tank around the opening includes the cover portion side. A third locking portion that can be locked to the opposite end;
The second locking portion is disposed on the side opposite to the cover portion side, and the tongue portion is inserted into the opening, and the portion of the storage tank around the opening includes the cover portion side. The electrode cover according to claim 1, further comprising a fourth locking portion that can be locked to the opposite end portion.   The said tongue piece part is an electrode cover of any one of Claims 1-3 containing the knob | pick part provided in the opposite side to the said cover part side with respect to the said 1st latching | locking part.   The electrode cover according to any one of claims 1 to 4, wherein the tongue piece portion is formed of a flexible resin plate.

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