Lid unit and lid replacement method

Abstract

To provide a cover body unit capable of steadily outputting a radio signal outputted from inside an existing housing body to outside the housing body, and a replacement method for a cover body.SOLUTION: A cover body unit 10 includes a cover attachment adaptor 20 attached to an existing metal-made cover body mounting frame 3 and a radio-transmitting cover body 50 supported via the cover attachment adaptor 20, so that it is possible to steadily output a radio signal outputted from inside an existing housing body to outside the housing body and also easily install the cover body 50 at high accuracy to a mounting section preformed in the cover attachment adaptor 20 without using the existing metal-made cover body mounting frame 3.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lid unit that is attached to an opening of a housing that houses a water meter or the like, and a lid replacement method. [Background technology]

[0002] Conventionally, a method of reading water meters has been devised that uses smart meters that can transmit usage data measured by a water measuring device called a water meter to a water utility company via wireless communication.

[0003] Water meters are generally housed inside a housing device consisting of a housing and a lid that is placed on a lid mounting portion formed in the top opening of the housing, or a housing device consisting of a housing, a lid mounting frame fixed integrally to the top opening of the housing, and a lid that is placed on the lid mounting frame.Therefore, when reading using a smart meter, a wireless communication unit for transmitting usage data via wireless signals must be installed inside the housing device.However, if the lid is made of metal, for example, the radio waves output from the wireless communication unit will be reflected by the metal lid, hindering wireless communication.

[0004] Therefore, it has been proposed to provide a metal cover with a plurality of holes through which radio waves can pass (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-90204 Summary of the Invention [Problem to be solved by the invention]

[0006] It is possible to consider replacing the metal cover of an existing housing with a metal cover having multiple holes like the housing device described in Patent Document 1 above, but in existing housings, the relationship between the installation position of the receiver that receives the radio wave signal output from the wireless communication unit and the installation position of the housing varies, such as the distance and angle, making it difficult to stably output the radio wave signal output from the wireless communication unit installed inside the housing to the outside of the housing.

[0007] Another option is to drill holes in the metal lid of an existing housing to allow radio waves to pass through, but this would require processing the metal lid on-site, and even then, it may not be effective enough to stably output radio signals outside the housing.

[0008] The present invention has been made in response to such problems, and aims to provide a lid unit and a lid replacement method that can stably output radio signals output from inside an existing housing to the outside of the housing. [Means for solving the problem]

[0009] In order to solve the above problems, the lid unit of the present invention comprises: a lid mounting adapter that is attached to a lid mounting portion formed in an opening of an existing metal housing or to a metal lid mounting frame that is provided separately from the housing; a radio wave transparent lid supported via the lid mounting adapter; the law of nature, The lid mounting adapter is The flange has a first flange portion extending outward and a second flange portion provided below the first flange portion and extending inward, The second flange portion has a mounting portion on which the radio wave transparent lid can be mounted. It is characterized by the following. According to this feature, by using a radio wave transparent lid, radio signals output from inside an existing housing can be stably output to the outside of the housing. Also, the radio wave transparent lid can be easily installed on the lid mounting adapter without using a lid mounting portion or metal lid mounting frame formed in the opening of the existing metal housing. The lid unit of the present invention is a lid mounting adapter that is attached to a lid mounting portion formed in an opening of an existing metal housing or to a metal lid mounting frame that is provided separately from the housing; a radio wave transparent lid supported via the lid mounting adapter, The lid mounting adapter is a first flange portion extending outward, a second flange portion extending inward, and a notch portion formed in the existing metal casing or the metal lid mounting frame, capable of accommodating a protrusion for supporting the existing lid; The second flange portion has a mounting portion on which the radio wave transparent lid can be mounted. According to this feature, the lid mounting adapter can be easily attached without removing the protrusions provided on the existing metal housing or metal lid mounting frame.

[0010] The lid mounting adapter is 、 A rotation shaft that rotatably supports the radio wave transparent cover of It is characterized by being prepared. According to this feature, the radio wave transparent lid can be easily and rotatably mounted on the lid mounting adapter with high accuracy.

[0011] The lid mounting adapter is characterized by having a mounting portion for the metal housing or the wireless communication unit housed in the housing.

[0012] The lid mounting adapter is characterized by being made of a metal material. According to this feature, the radio wave transparent lid can be stably supported by a strong lid mounting adapter.

[0013] The lid replacement method of the present invention includes the steps of: A lid replacement method for replacing a metal lid placed on a lid placement portion formed in an opening of an existing metal casing or a metal lid placement frame provided separately from the casing, comprising: removing the metal lid from the lid mounting portion or the metal lid mounting frame; After the step of removing the metal lid, a step of attaching a lid mounting adapter to the lid mounting portion or the metal lid mounting frame; After the step of attaching the lid mounting adapter, attaching a radio wave transparent lid to the lid attachment adapter; The present invention is characterized in that it includes: According to this feature, by using a radio wave transparent lid, radio signals output from inside an existing housing can be stably output to the outside of the housing. Also, the radio wave transparent lid can be easily installed on the lid mounting adapter without using a lid mounting portion or metal lid mounting frame formed in the opening of the existing metal housing. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 2 is a cross-sectional view showing the water meter box buried in the ground. [Figure 2] 1A is a perspective view showing the lid mounting adapter as seen from diagonally front, and FIG. 1B is a perspective view showing the lid mounting adapter as seen from diagonally rear. [Figure 3] FIG. 2 is a plan view showing the lid mounting adapter. [Figure 4] 3A is a cross-sectional view taken along line AA in FIG. 3, (b) is a cross-sectional view taken along line BB in FIG. 3, and (c) is a cross-sectional view taken along line CC in FIG. [Figure 5] 4A is an enlarged cross-sectional view of the rear side taken along line AA in FIG. 3, FIG. 4B is a cross-sectional view taken along line DD in FIG. 3, and FIG. 4C is a cross-sectional view taken along line EE in FIG. [Figure 6] 3. (a) is an enlarged cross-sectional view of the left side of AA in FIG. 3, (b) is a cross-sectional view of FF in FIG. 3, and (c) is a cross-sectional view of GG in FIG. [Figure 7] 3. (a) is an enlarged cross-sectional view of the right side of BB in FIG. 3, (b) is an enlarged cross-sectional view of the left side of CC in FIG. 3, and (c) is a cross-sectional view of HH in FIG. [Figure 8] FIG. 2 is a cross-sectional view showing the upper part of the water meter box. [Figure 9] 10(a) to 10(c) are explanatory diagrams of the operation of the water meter box when it is submerged in water. [Figure 10] 1A is a cross-sectional view showing the upper part of the existing housing device, and FIG. 1B is a diagram showing the process of removing the metal cover. [Figure 11] 10(c) and 10(d) are diagrams showing the process of attaching the lid unit. [Figure 12] FIG. 10A is a cross-sectional view showing a lid mounting adapter, and FIGS. 10B and 10C are cross-sectional views showing existing housing devices of different sizes. [Figure 13] 10A and 10B are diagrams illustrating an attached state of the wireless communication unit. [Figure 14] 10A and 10B are diagrams illustrating an attached state of the wireless communication unit. [Figure 15] FIG. 10 is a diagram for explaining a mounting member serving as a first modified example. [Figure 16] FIG. 10 is a diagram illustrating a mounting member serving as a second modified example. [Figure 17] FIG. 10 is a diagram illustrating a mounting member as a third modified example. DETAILED DESCRIPTION OF THE INVENTION

[0015] [Form 1] Form 1 is a lid mounting adapter that is attached to a lid mounting portion formed in an opening of an existing metal housing or to a metal lid mounting frame that is provided separately from the housing; a radio wave transparent lid supported via the lid mounting adapter; It is characterized by consisting of: According to this feature, by using a radio wave transparent lid, radio signals output from inside an existing housing can be stably output to the outside of the housing. Also, the radio wave transparent lid can be easily installed on the lid mounting adapter without using a lid mounting portion or metal lid mounting frame formed in the opening of the existing metal housing.

[0016] [Form 2] Form 2 is A lid replacement method for replacing a metal lid placed on a lid placement portion formed in an opening of an existing metal casing or a metal lid placement frame provided separately from the casing, comprising: removing the metal lid from the lid mounting portion or the metal lid mounting frame; a step of attaching a lid mounting adapter to the lid mounting portion or the metal lid mounting frame; attaching a radio wave transparent lid to the lid attachment adapter; The present invention is characterized in that it includes: According to this feature, by using a radio wave transparent lid, radio signals output from inside an existing housing can be stably output to the outside of the housing. Also, the radio wave transparent lid can be easily installed on the lid mounting adapter without using a lid mounting portion or metal lid mounting frame formed in the opening of the existing metal housing.

[0017] [Form 3] A third aspect is the lid unit or lid replacement method according to the first or second aspect, The lid mounting adapter is a mounting portion on which the radio wave transparent lid can be mounted; and a rotation shaft that rotatably supports the radio wave transparent cover. According to this feature, the radio wave transparent lid can be easily and rotatably mounted on the lid mounting adapter with high accuracy.

[0018] [Form 4] A fourth aspect is a lid unit or a lid replacement method according to any one of the first to third aspects, The lid mounting adapter is characterized by being made of a metal material. According to this feature, the radio wave transparent lid can be stably supported by a strong lid mounting adapter.

[0019] [Form 5] A fifth aspect is a lid unit or a lid replacement method according to any one of the first to fourth aspects, The lid mounting adapter is characterized by having a notch that can accommodate a protrusion formed on the existing metal housing or the metal lid mounting frame. According to this feature, the lid mounting adapter can be easily attached without removing the protrusions provided on the existing metal housing or metal lid mounting frame.

[0020] [Form 6] A sixth aspect is the lid unit or the lid replacement method according to the fifth aspect, The lid mounting adapter has a generally rectangular shape in a plan view, The notches are formed on each of a pair of first sides that are parallel to each other and on each of a pair of second sides that are parallel to each other and perpendicular to the first sides. According to this feature, regardless of whether a protrusion is provided on the first side or the second side of an existing metal casing or metal lid mounting frame, a common lid mounting adapter can be easily attached.

[0021] [Form 7] A seventh aspect is a lid unit or a lid replacement method according to any one of the first to sixth aspects, the lid mounting adapter is made of a metal material, The lid mounting adapter has a mounting hole formed therein, and the lid mounting adapter can be attached to the existing metal housing by threading a screw member attached to the mounting hole into the existing metal housing. According to this feature, the radio wave transparent lid can be stably placed on the existing metal housing via the lid mounting adapter.

[0022] [Form 8] Aspect 8 is a lid unit or a lid replacement method according to any one of aspects 1 to 7, The lid mounting adapter is characterized by having a wireless communication unit mounting portion to which a wireless communication unit can be mounted. According to this feature, the wireless communication unit can be easily accommodated inside the housing.

[0023] [Form 9] A ninth aspect is a lid unit or a lid replacement method according to any one of the first to eighth aspects, The lid mounting adapter is a first flange portion extending outward; a second flange portion provided below the first flange portion and extending inward, The second flange portion has a mounting portion on which the radio wave transparent lid can be mounted. According to this feature, it is possible to prevent the radio wave transparent lid from protruding from the top surface of the lid mounting adapter.

[0024] [Form 10] A tenth aspect of the present invention is a lid unit or a lid replacement method according to the ninth aspect, The width of the first flange portion is longer than the width of the peripheral edge of the opening of the existing metal casing or the metal lid mounting frame. According to this feature, a common lid mounting adapter can be attached to a plurality of metal housings and metal lid mounting frames with different opening sizes, thereby reducing manufacturing costs.

[0025] [Form 11] Aspect 11 is a lid unit or a lid replacement method according to aspect 9 or 10, The second flange portion is a mounting portion for supporting the radio wave transparent lid; and a non-mounting portion that does not support the radio wave transparent lid. According to this feature, the non-placing portion can prevent sediment from accumulating on the second flange portion.

[0026] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the lid unit and the lid replacement method according to the present invention will be described based on examples. [Example]

[0027] The lid unit and lid replacement method of this embodiment will be described with reference to Figures 1 to 14. In the following description, when viewed from the front side of Figure 1, the left and right sides refer to the left and right sides of the lid unit and the housing device, the front side refers to the front side of the lid unit and the housing device, and the back side refers to the rear side of the lid unit and the housing device.

[0028] As shown in Figure 1, for example, a water meter box 1 (also called a meter box) is buried underground in a residential area, and inside the water meter box 1 are buried a portion of a water pipe 11, a water meter 12 (also called a water meter) connected to the water pipe 11, and a stop valve 13 connected to the water meter 12.

[0029] The water meter box 1 has a housing device consisting of a bottomed box-shaped housing 2 with an opening 2a that is generally rectangular in plan view formed on the top surface, a cast iron lid mounting frame 3 that is fixed integrally to the opening 2a of the housing 2 with an adhesive or the like, and a lid unit 10, which will be described later. The housing 2 is formed into a bottomed box shape with side walls and a bottom wall made of concrete, and water pipes 11 are inserted into openings 2b, 2b formed in the left and right side walls.

[0030] The water meter 12 is capable of measuring the amount of water used, and is connected to a wireless communication unit 15 housed inside the housing 2 by a wire C. The usage data measured by the water meter 12 is transmitted to the wireless communication unit 15, and then transmitted from the wireless communication unit 15 to a base station or the like by wireless communication, and then transmitted from the base station or the like to a data management server of a water utility or the like via a communication line. The usage data measured by the water meter 12 may be transmitted directly from the water meter 12 to the wireless communication unit 15, or a reading device (not shown) that reads usage data from the meter of the water meter 12 may be attached to the water meter 12, and the read usage data may be transmitted directly from the reading device to the wireless communication unit 15.

[0031] [Lid unit] As shown in Figure 1, the lid unit 10 consists of a cast iron lid mounting adapter 20 that is attached to the lid mounting frame 3, and a synthetic resin lid 50 that is supported via the lid mounting adapter 20. The lid unit 10 is used, for example, as described below, when removing a metal lid 7 (see Figure 10) that has been attached to an existing water meter box 1 and replacing it with a synthetic resin lid 50.

[0032] [Lid mounting adapter] As shown in Figures 2 to 6, the lid mounting adapter 20 is made of cast iron and is formed into a roughly square frame shape in plan view, with a pair of front and rear long side portions 20a extending in the left-right direction, a pair of left and right short side portions 20b extending in the front-to-back direction, and an opening 20c in the shape of a roughly horizontally elongated rectangle in the center.

[0033] The long side portion 20a and the short side portion 20b are composed of a flange portion 21 (first flange portion) which is approximately rectangular in plan view and extends approximately horizontally outward, a cylindrical first hanging wall portion 22 which hangs downward from the inner peripheral edge of the flange portion 21, a middle wall portion 23 (second flange portion) which extends inward from the lower end of the first hanging wall portion 22, a second hanging wall portion 24 which hangs downward from the inner peripheral edge of the middle wall portion 23, a bottom wall portion 25 which extends inward from the lower end of the second hanging wall portion 24, and a standing wall portion 26 which extends upward from the inner peripheral edge of the bottom wall portion 25.

[0034] Notches 27 that are open to the sides and downwards are formed at the corners of the left and right sides of the first hanging wall portion 22, middle wall portion 23, second hanging wall portion 24, bottom wall portion 25 and standing wall portion 26 in the long side portion 20a, and the front and rear sides of the first hanging wall portion 22, middle wall portion 23, second hanging wall portion 24, bottom wall portion 25 and standing wall portion 26 in the short side portion 20b.

[0035] That is, flange portions 21 of each long side portion 20a and each short side portion 20b are connected to each other to form a cylindrical peripheral wall, while first depending wall portion 22, middle wall portion 23, second depending wall portion 24, bottom wall portion 25, and standing wall portion 26 are separated by corner cutout portions 27. Furthermore, a pair of left and right rotating shafts 28 extending in the left-right direction protrude above cutout portions 27 on the rear side of the inner surface of first depending wall portion 22 of each short side portion 20b, so that lid body 50 can be pivotally supported.

[0036] 4(b) and 5(a) to 5(c), the middle wall portion 23 of the rear long side 20a is positioned slightly lower than the middle wall portions 23 of the front long side 20a and the left and right short side portions 20b to avoid contact with the end of the lid body 50 (see FIG. 8). The middle wall portion 23 has horizontal surface portions 23a positioned in the center and on the left and right sides in the left-right direction, horizontal surface portions 23b positioned between adjacent horizontal surface portions 23a, and inclined surface portions 23c positioned between the horizontal surface portions 23a and 23b.

[0037] As shown in Figure 4(c) and Figures 6(a) to (c), the middle wall portion 23 of the front long side portion 20a has horizontal surface portions 23d arranged in the center and on the left and right sides in the left-right direction, and inclined surface portions 23e arranged on the left and right sides of the horizontal surface portion 23d.

[0038] 4(a) and 7(a)-(c), the middle wall portions 23 of the left and right short side portions 20b are formed symmetrically and have horizontal surface portions 23f located on the front and rear sides and inclined surface portions 23g located in the center in the front-to-rear direction and on the front side. In addition, horizontal surface portions 23h (see FIGS. 4(a) and 4(c)) that are approximately L-shaped in plan view are formed above the notches 27 between the rear long side portion 20a and the left and right short side portions 20b.

[0039] In this way, in the middle wall 23, the plurality of horizontal surface portions 23d formed on the front long side portion 20a, the plurality of horizontal surface portions 23f formed on the left and right short side portions 20b, and the horizontal surface portion 23h that is substantially L-shaped in plan view form a substantially horizontal placing portion on which the lid body 50 can be placed in the closed state. In addition, the inclined surface portions 23e, 23g are disposed between the horizontal surface portions 23d, 23f, 23h, which makes it easier for soil, pebbles, etc. to slide off, thereby preventing soil or pebbles from accumulating between the lid body 50 and the horizontal surface portions 23d, 23f, 23h, making it impossible to close the opening 20c.

[0040] As shown in Figures 3 and 7(c), grooves 29 extending outward are formed radially in a plan view at the four corners of the flange portion 21. Long mounting holes 29a extending in the longitudinal direction are formed in the bottom wall of the grooves 29, and screw members N1 (see Figure 11(d)) for fixing the lid mounting adapter 20 to the lid body mounting frame 3 can be attached thereto. The grooves 29 are sized to accommodate the heads of the screw members N1 so that they do not protrude above the top surface of the flange portion 21. In addition, three non-slip grooves 30 of different sizes are formed in the top surface of the flange portion 21, each shaped like a rectangular frame in a plan view.

[0041] 4 and 8, flange 21 is thin and its periphery is tapered inward from the outer edge, which minimizes the effect of any difference in level with the ground. Also, as shown in Fig. 8, when lid 50 is placed, the upper surface of lid 50 and the upper surface of flange 21 are flush with each other, so the difference in level between lid 50 and the ground is limited to the thickness of flange 21, allowing lid 50 to be placed at approximately the same height as the ground.

[0042] As shown in FIG. 4, mounting holes 31 are formed at multiple locations on the left and right sides of first hanging wall portion 22 of front long side portion 20a, on the left and right sides of second hanging wall portion 24 of rear long side portion 20a, and on the front and rear sides of first hanging wall portion 22 of left and right short side portions 20b, so that screw members N2 (see FIG. 11(d)) for fixing lid mounting adapter 20 to lid body mounting frame 3 can be attached from the inside. As shown in FIGS. 5(b), 6(b), and 7(b), a large-diameter portion is provided on the inside of mounting hole 31 so that the head of screw member N2 can be received without protruding inward. The number and positions of mounting holes 31 are not limited to those described above and can be changed in various ways.

[0043] As shown in Figures 2(b) and 6(a), a downwardly opening notch 32 is formed in the center of the left-right direction of the front second hanging wall portion 24, bottom wall portion 25 and upright wall portion 26, allowing the opening restriction device 55 described later to be inserted.

[0044] As shown in Figures 5 to 7, the second hanging wall portion 24, bottom wall portion 25 and upright wall portion 26 of the long side portion 20a and the short side portion 20b are each formed in a hook shape when viewed in vertical cross section, thereby enabling the hanging support of the mounting member 60 (see Figures 13 and 14) described later.

[0045] [Lid] 1 and 8, the lid 50 is made of a synthetic resin plate-like member formed in a generally horizontally elongated rectangular shape in plan view that is slightly smaller than the opening 20c of the lid mounting adapter 20, and is rotatable between an open position where it stands up when rotated upward about the rotation shaft 28 to open the opening 20c, and a closed position where it lies flat in a generally horizontal direction when rotated downward about the rotation shaft 28 to close the opening 20c. Although not shown in detail, the lid 50 can be removed from the rotation shaft 28 in the open position, but is locked to the rotation shaft 28 when rotated so that it cannot be removed from the rotation shaft 28, and in the closed position, the lid 50 cannot be separated from the lid mounting adapter 20.

[0046] The lid body 50 has bearings 51 detachably attached to the left and right rotary shafts 28, and a hooking opening 52 through which an operator (such as an operator performing meter reading) can insert and hook his / her fingers or a predetermined jig when rotating the lid body 50. The bearings 51 are formed at both left and right ends on the rear side of the lid body 50. The hooking opening 52 is formed as a notch penetrating through the top and bottom surfaces of the lid body 50 at a central position in the left-right direction on the front side of the lid body 50.

[0047] The lid 50 has a plate-like lid main body 53 that is rectangular in plan view, and a plate-like, lattice-like rib portion 54 that protrudes from almost the entire bottom surface (back surface) of the lid main body 53 when it is closed. The lid 50 is provided with an opening restriction device 55 to prevent the lid 50 from accidentally opening if the housing 2 is flooded due to a large amount of water caused by heavy rain or the like, or from accidentally opening due to air pressure or water pressure inside the housing 2 in the case of sudden flooding.

[0048] The opening restrictor 55 normally allows the lid 50 to rotate upward and downward relative to the housing 2, but when the container is submerged, it engages with the housing 2 to restrict the upward rotation of the lid 50 relative to the housing 2, thereby maintaining the lid 50 in a closed state. Briefly, as shown in Figures 8 and 9, the opening restrictor 55 is provided at a central position in the left-right direction on the front side of the underside of the lid 50 so as to be rotatable about a shaft member 56 facing left-right. The opening restrictor 55 has a buoyancy material formed by molding a material such as foamed resin that generates large buoyancy, and is supported at its rear end by the shaft member 56, while a locking portion 57 is provided at its front end that can be locked onto the upper edge 32a (locked portion) of the notch 32.

[0049] As shown in Figure 9(a), under normal circumstances, the front end of the opening restricting device 55 hangs down due to its own weight, and is in an inclined, low-front, high-rear position. If water floods the housing 2 in this inclined position and the water level inside the housing 2 rises, the front end is pushed up by the buoyancy generated in the buoyancy material (not shown), and the device rotates from the inclined position to a horizontal position with the rear end as a fulcrum, as shown in Figure 9(b).

[0050] Thereafter, as the water level inside the housing 2 rises further, the entire opening restricting device 55 is pushed up by buoyancy as the water level rises, and moves vertically upward while maintaining its horizontal position, as shown in Figure 9(c), and before the housing 2 is completely submerged in water, the locking portion 57 engages with the upper edge 32a of the notch 32, thereby entering the restricted state. As a result, when the water meter box 1 is submerged, the upward rotation of the lid body 50 is restricted, and the closed state of the lid body 50 is maintained. Furthermore, since the lid body 50 does not separate from the housing 2 in the closed state, the restricted state also restricts the lid body 50 from separating from the housing 2.

[0051] On the other hand, when the water inside the housing 2 drains through the insertion holes and drain holes (not shown) and the water level drops, the opening restriction device 55 moves vertically downward while maintaining a horizontal position, and then the front end side becomes able to rotate downward with the rear end side as a fulcrum, and when the water level drops further, it rotates downward with the rear end side as a fulcrum until it becomes inclined under its own weight from the horizontal position, thereby once again entering an open state and allowing the lid body 50 to be opened.

[0052] [How to replace the lid] Next, a method for replacing the metal cover 7 attached to the existing water meter box 1 with the synthetic resin cover 50 will be described with reference to FIGS.

[0053] First, to explain the existing water meter box 1, as shown in Figure 10(a), the lid mounting frame 3 fixed to the upper peripheral edge of the opening 2a in the housing 2 has a flange portion 4 placed on the upper end surface of the housing 2 and a hanging wall portion 5 hanging downward from the flange portion 4, and is formed of cast iron in the shape of a roughly square frame in plan view. Lid mounting portions 6 that protrude inward are provided circumferentially on the upper inner surfaces of the front wall 5a (not shown), rear wall 5b, and left side wall 5c of the hanging wall portion 5, and are formed in a roughly inverted U shape in plan view.

[0054] As shown in FIG. 10(a), a pair of front and rear pivot shafts 8 extending horizontally in the front-to-rear direction protrude from the right inner surfaces of the front wall 5a (not shown) and the rear wall 5b. Thus, the metal lid 7 is supported so as to be able to open and close the opening 3a of the lid mounting frame 3 about its right side by pivotally supporting a pair of front and rear bearing portions 9 formed on the front and rear right sides of its underside. In addition, the metal lid 7 is placed on the lid mounting portion 6 in the closed position. In addition, as shown in FIG. 10(b), the metal lid 7 can be removed from the lid mounting frame 3 by pulling it upward. The top surface of the housing 2 and the top surface of the metal lid 7 in the closed state are located approximately flush with the ground surface of the residential area, etc.

[0055] As shown in Figure 10(a), the metal lid 7 is rotatably supported via a rotation shaft 8 on the lid mounting frame 3 fixed to the upper peripheral edge of the opening 2a in the housing 2. As shown in Figure 10(b), the metal lid 7 is pulled upward and removed from the lid mounting frame 3. The lid mounting frame 3 having the lid mounting portion 6 is left in place because it is fixed to the top of the housing 2.

[0056] Next, as shown in Figure 11(c), the lid mounting adapter 20 is lowered from above the lid body mounting frame 3 with the first hanging wall portion 22, middle wall portion 23, second hanging wall portion 24, bottom wall portion 25 and upright wall portion 26 of the long side portion 20a and short side portion 20b facing downward.

[0057] Then, as shown in Figure 11(d), a cylindrical portion consisting of the first hanging wall portion 22, middle wall portion 23, second hanging wall portion 24, bottom wall portion 25 and upright wall portion 26 below the flange portion 21 in the lid mounting adapter 20 is inserted into the opening 3a of the lid body mounting frame 3, and the flange portion 21 is placed on the upper surface of the flange portion 4 of the lid body mounting frame 3, so that the lid mounting adapter 20 is supported by the opening 3a of the lid body mounting frame 3.

[0058] Furthermore, a lid mounting portion 6 having a generally U-shape in plan view and a pivot shaft 8 protrude from the inner surface of the hanging wall portion 5 of the lid mounting frame 3, and the tubular portion consisting of the first hanging wall portion 22, middle wall portion 23, second hanging wall portion 24, bottom wall portion 25 and standing wall portion 26 of the lid mounting adapter 20 is inserted into the inside of the lid mounting portion 6, thereby disposing the lid mounting adapter 20 at approximately the center of the opening 3a. Furthermore, a notch 27 is formed at the corner between the long side portion 20a and the short side portion 20b, so that the pivot shaft 8 can be accommodated in the notch 27 even if the protruding length of the pivot shaft 8 is longer than the protruding length of the lid mounting portion 6.

[0059] Thus, when inserting the cylindrical portion composed of the first hanging wall portion 22, the middle wall portion 23, the second hanging wall portion 24, the bottom wall portion 25, and the standing wall portion 26 of the lid attachment adapter 20 into the opening 3a, it is possible to avoid contact with the lid placement portion 6 and the rotation shaft 8 protruding from the inner surface of the hanging wall portion 5 of the lid placement frame 3. Therefore, the lid attachment adapter 20 can be fitted into the opening 3a without cutting the rotation shaft 8.

[0060] By the way, the sizes of such water meters may vary depending on each local government body. For example, as shown in FIG. 12(b), there is a lid placement frame 3A in which the length of the long side portion is the length dimension L11, the length inside the lid placement portion 6 on the long side portion of the opening 3a is the length dimension L12, and the length in the protruding direction of the flange portion 4 is the length dimension L13. As shown in FIG. 12(c), there is a lid placement frame 3B in which the length dimension of the long side portion of the lid placement frame 3B is a length dimension L21 longer than L11, the length dimension inside the lid placement portion 6 on the long side portion of the opening 3a is a length dimension L22 longer than L12, and the length dimension in the protruding direction of the flange portion 4 is a length dimension L23 longer than L13.

[0061] In addition, in the above description, only the length dimensions of the long side portions of the lid placement frames are compared, but the same relationship holds for the length dimensions of each short side portion as for the length dimensions of each long side portion. Also, one of the dimensions of the long side portion and the short side portion may be common, and only the other dimension may be different.

[0062] On the other hand, in the lid attachment adapter 20 of this embodiment, the length dimension L1 of the long side portion 20a is made longer than the length dimensions L11 and L21 of the long side portions of the lid placement frames 3A and 3B (L1 > L21 > L11). The length dimension L2 of the first hanging wall portion 22 of the long side portion 20a of the lid attachment adapter 20 is made shorter than the length dimensions L12 and L22 inside the lid placement portion 6 on the long side portion of the opening 3a of the lid placement frames 3A and 3B (L2 < L12 < L22). The length dimension L3 of the flange portion 21 of the lid attachment adapter 20 is made longer than the length dimensions L13 and L23 of the flange portions 4 of the lid placement frames 3A and 3B (L3 > L23 > L13).

[0063] In other words, the first hanging wall portion 22 of the lid mounting adapter 20 has a short length dimension L2 that allows it to be inserted into the openings 3a of two different sized lid body mounting frames 3A, 3B, while the flange portion 21 of the lid mounting adapter 20 has a long length dimension L3 that allows it to be placed on the upper surface of the flange portion 4 of two different sized lid body mounting frames 3A, 3B.Therefore, a common lid mounting adapter 20 for two different sized lid body mounting frames 3A, 3B can be supported by the flange portion 21 to prevent it from falling when at least the first hanging wall portion 22 is inserted into the opening 3a.

[0064] Furthermore, the sizes of the lid body mounting frames are not limited to the two types mentioned above, and there may be three or more types of lid body mounting frames of different sizes, but it is preferable that the lid mounting adapter 20 has a common size that can fit into each of these multiple lid body mounting frames.

[0065] 11(d), after adjusting the mounting position of the lid mounting adapter 20 supported by the lid mounting frame 3, screw members N1 are attached to the elongated mounting holes 29a formed in the four corners of the flange portion 21 of the lid mounting adapter 20, and the attached screw members N1 are screwed into and fixed to the flange portion 4 of the lid mounting frame 3 and the housing 2. Note that, because the elongated mounting holes 29a are elongated holes, they can be adjusted to a suitable mounting position in accordance with the protruding length dimension of the flange portion 4 of the lid mounting frame 3 and attached.

[0066] Next, screw members N2 are attached from the inside to each mounting hole 31 formed in the lid mounting adapter 20, and the attached screw members N2 are screwed into the hanging wall portion 5 of the lid body mounting frame 3 and the housing 2, thereby fixing the lid mounting adapter 20 to the lid body mounting frame 3. This makes the lid mounting adapter 20 integrated with the housing 2. Note that in this embodiment, the lid mounting adapter 20 is fixed to the lid body mounting frame 3 by screw members N1 attached to the elongated mounting holes 29a and screw members N2 attached to the mounting holes 31, but it may be fixed by only one of the screw members N1 and screw members N2.

[0067] The bearing portion 51 (see Figure 8) of the lid body 50 is supported on a pivot shaft 28 formed on the lid mounting adapter 20 fixed to the lid body mounting frame 3, so that the lid body 50 is supported via the lid mounting adapter 20 so that the opening 20c can be opened and closed.

[0068] An existing lid body mounting frame 3 may be deformed due to rust or deterioration over time after long-term use, or may have manufacturing errors due to being made of cast iron.Therefore, without using the pivot axis 8 or lid body mounting portion 6 formed in such an existing lid body mounting frame 3, and without performing any processing such as cutting out the pivot axis 8 or lid body mounting portion 6, a synthetic resin lid body 50 is supported on a pivot axis 28 formed in advance in the lid mounting adapter 20 and placed on the horizontal surface portions 23d, 23f, and 23h that serve as the lid body mounting portion, allowing the lid body 50 to be easily installed with greater precision than if it were installed on the pivot axis 8 or lid body mounting portion 6 formed in the existing lid body mounting frame 3.

[0069] Furthermore, the lid mounting adapter 20 is supported by the lid body mounting frame 3 by placing the flange portion 21 on the upper surface of the flange portion 4 of the lid body mounting frame 3 which is placed on the upper end surface of the housing 2, and the first hanging wall portion 22, middle wall portion 23, second hanging wall portion 24, bottom wall portion 25 and upright wall portion 26 other than the flange portion 21 are not placed on the housing 2 or the lid body mounting frame 3 (see Figure 11 (d)), so that the load applied to the lid body 50 supported by the lid mounting adapter 20 is distributed via the wide flange portion 21, and the lid body 50 is supported stably.

[0070] In this embodiment, a method of replacing the lid body 50 by attaching a lid mounting adapter 20 to a metal lid body mounting frame 3 fixed to the top of a concrete casing 2 is exemplified, but the present invention is not limited to this, and if the existing casing is made of metal, it may be replaced with the lid body 50 by attaching a lid mounting adapter 20 to a lid body mounting portion that is integrally formed in advance with the opening of the metal casing, as in the above replacement method.

[0071] [Wireless communication unit mounting parts] 13 and 14, second hanging wall portion 24, bottom wall portion 25, and upright wall portion 26 of long side portion 20a and short side portion 20b of lid mounting adapter 20 are each formed in a generally upward hook shape in vertical cross section and extend in the longitudinal direction. Mounting member 60 is used to mount wireless communication unit 15 to lid mounting adapter 20, and is made of a synthetic resin plate-like member having downward hook-shaped hook portion 61 formed at its upper end and downward hook-shaped holding portion 62 formed at its lower end.

[0072] In this embodiment, the left and right lower portions of the wireless communication unit 15 are placed on the holding portions 62 of the two mounting members 60 and fixed with screw members N3, and the hook portions 61 of the mounting members 60 are engaged with the vertical wall portion 26 from above, thereby enabling the wireless communication unit 15 to be suspended from the lid mounting adapter 20. Note that, in this embodiment, the wireless communication unit 15 is suspended from the lid mounting adapter 20 using two mounting members 60, but the wireless communication unit 15 may also be suspended from the lid mounting adapter 20 using one or three or more mounting members 60.

[0073] Furthermore, by suspending the mounting member 60 on the vertical wall portion 26 formed on the lid mounting adapter 20, the wireless communication unit 15 can be placed near the horizontal surface portions 23d, 23f, and 23h, that is, near the lid 50 where wireless communication is less likely to be obstructed, without having to process the existing housing 2 or lid mounting frame 3.

[0074] Furthermore, because the standing wall portion 26 extends in the left-right direction, that is, along the water pipe 11, the wireless communication unit 15 can be slid left-right while suspended from the standing wall portion 26, making it easy to adjust the position in the left-right direction. Therefore, for example, as shown in Fig. 14, the left-right position can be adjusted depending on the arrangement positions of the water meter 12 and the stop valve 13, or the position can be adjusted to make it less likely that wireless communication will be obstructed.

[0075] In addition, in this embodiment, the hook portion 61 of the mounting member 60 is suspended from the rear vertical wall portion 26, but the wireless communication unit 15 may also be positioned by suspending it from any of the front, left, or right vertical wall portions 26, for example.

[0076] Furthermore, a wire housing 63 is provided on the rear surface of the holding portion 62 of the two mounting members 60. The wire housing 63 is composed of an upward L-shaped hook 63a and a downward L-shaped hook 63b located below the hook 63a, and as shown in Fig. 13, an excess portion of the wire C connecting the water meter 12 and the wireless communication unit 15 can be wound around the hooks 63a, 63b of one of the two mounting members 60 and housed therein. The wire C may be wound around the hooks 63a, 63b of each of the two mounting members 60, or the wire C may be wound around the upper hook 63a or the lower hook 63b of the two mounting members 60.

[0077] Furthermore, instead of winding the wiring C around the hooks 63a, 63b as described above, for example, although not specifically shown, a wiring duct or the like capable of accommodating excess wiring C may be provided at a predetermined location on the lid mounting adapter 20, and the wiring C may be accommodated in the wiring duct.

[0078] [Action and effect] As described above, the lid unit 10 according to the embodiment of the present invention comprises the lid mounting adapter 20 attached to the existing metal lid mounting frame 3 and the synthetic resin lid 50, i.e., radio wave-transmitting, supported via the lid mounting adapter 20. By using the radio wave-transmitting lid 50, radio signals output from the wireless communication unit 15 installed inside the existing housing 2 can be stably output to the outside of the housing 2, compared to replacing the existing metal lid 7 with another metal lid with holes or machining the existing metal lid 7 to provide holes. Furthermore, the installation on-site is simplified because it does not require additional processing, such as drilling holes in the existing metal lid 7, and can be achieved by simply attaching the lid mounting adapter 20 to the existing metal lid mounting frame 3. Furthermore, the lid 50 can be easily installed with high precision on the horizontal surfaces 23d, 23f, and 23h pre-formed on the lid mounting adapter 20 without using the existing metal lid mounting frame 3.

[0079] In addition, the lid mounting adapter 20 is equipped with horizontal surface portions 23d, 23f, and 23h on which the lid body 50 can be placed, and a rotation axis 28 that supports the lid body 50 so that it can be rotated, so that the lid body 50 can be easily and precisely installed on the lid mounting adapter 20.

[0080] In addition, the lid mounting adapter 20 has a cutout portion 27 that can accommodate the pivot shaft 8 formed in the lid body mounting frame 3, so that the lid mounting adapter 20 can be easily mounted without removing the pivot shaft 8 protruding from the lid body mounting frame 3.

[0081] Furthermore, since the lid mounting adapter 20 is made of a metal material, the lid body 50 can be stably supported by the strong metal lid mounting adapter 20.

[0082] Also, a lid replacement method for replacing a metal lid 7 placed on a lid mounting frame 3 includes the steps of removing the metal lid 7 from the lid mounting frame 3, attaching a lid mounting adapter 20 to the lid mounting frame 3, and placing a synthetic resin lid 50 on the lid mounting adapter 20. By replacing the existing metal lid 7 with a radio wave transparent lid 50, radio signals output from a wireless communication unit 15 provided inside the existing housing 2 can be stably output to the outside of the housing 2, compared to replacing the existing metal lid 7 with another metal lid with holes provided therein or machining the existing metal lid 7 to provide holes therein. Furthermore, there is no need for additional machining work such as drilling holes in the existing metal lid 7, and the simple task of attaching the lid mounting adapter 20 to the existing metal lid mounting frame 3 simplifies on-site installation. Furthermore, the lid 50 can be easily installed with high precision on the horizontal surface portions 23d, 23f, and 23h that are formed in advance on the lid mounting adapter 20 without using an existing metal lid mounting frame 3.

[0083] The lid mounting adapter 20 has a generally rectangular shape in plan view, and the notches 27 are formed on each of a pair of parallel long sides 20a and a pair of parallel short sides 20b that are perpendicular to the first side. This allows the common lid mounting adapter 20 to be easily attached regardless of whether the rotation shaft 8 protrudes from the long side 20a or the short side 20b of the lid mounting frame 3.

[0084] The lid mounting adapter 20 is made of a metal material, and has mounting holes 31 formed therein. The lid mounting adapter 20 is attached to the housing 2 by threading the screw members N2 attached to the mounting holes 31 into the housing 2. This allows the lid body 50 to be stably placed on the housing 2 via the lid mounting adapter 20.

[0085] Furthermore, the lid mounting adapter 20 includes mounting members 60, 160, 260, and 360 to which the wireless communication unit 15 can be attached, so that the wireless communication unit 15 can be easily accommodated inside the housing 2.

[0086] In addition, the lid mounting adapter 20 has a flange portion 21 that protrudes outward and a middle wall portion 23 that is located below the flange portion 21 and protrudes inward, and the middle wall portion 23 has horizontal surface portions 23d, 23f, and 23h on which the lid body 50 can be placed, thereby preventing the lid body 50 from protruding from the top surface of the lid mounting adapter 20.

[0087] Furthermore, since the length dimension L3 of the flange portion 21 is longer than the length dimensions L13, L23 of the peripheral portions of the opening of the lid body mounting frame 3, a common lid mounting adapter 20 can be attached to multiple lid body mounting frames 3 with openings of different sizes, thereby reducing manufacturing costs.

[0088] Furthermore, the middle wall portion 23 has horizontal surface portions 23d, 23f, and 23h that support the lid body 50, and inclined surface portions 23e and 23g that do not support the lid body 50, and the inclined surface portions 23e and 23g can prevent soil from accumulating on the horizontal surface portions 23d, 23f, and 23h.

[0089] Furthermore, the lid mounting adapter 20 has the elongated mounting holes 29a as temporary fastening portions for the existing housing 2, which makes it possible to easily perform the mounting work of the lid mounting adapter 20.

[0090] Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention also includes modifications and additions that do not deviate from the gist of the present invention.

[0091] [Variation 1] Next, a mounting member 160 of the wireless communication unit 15 as Modification 1 of the present invention will be described with reference to FIG.

[0092] Mounting member 160 is made of synthetic resin and is formed in a box shape with opening 160a on the left side, so that wireless communication unit 15 can be accommodated in a horizontal position through opening 160a. The length dimension in the front-to-rear direction of upper plate 161 is slightly shorter than the distance between front and rear second hanging wall portions 24, so that wireless communication unit 15 can be supported in a substantially horizontal position by placing the front and rear end portions of upper plate 161 on the upper ends of front and rear upright wall portions 26.

[0093] In addition, downwardly bent pieces 162 are formed at the front and rear ends of the upper plate 161, and by inserting the bent pieces 162 into the grooves formed by the second hanging wall portion 24, the bottom wall portion 25, and the upright wall portion 26, the front and rear ends of the upper plate 161 are prevented from departing from the upright wall portion 26 and are guided to slide left and right.

[0094] In this way, the mounting member 160 allows the wireless communication unit 15 to be positioned above the water meter 12 and near the lid body 50, making it less likely that wireless communication with the outside will be obstructed and less likely to become submerged in water when flooded.

[0095] In this embodiment, the wireless communication unit 15 is supported substantially horizontally by placing the front and rear end portions of the upper plate 161 on the upper ends of the front and rear standing wall portions 26, but the wireless communication unit 15 may be supported substantially horizontally by placing the left and right end portions of the upper plate 161 on the upper ends of the left and right standing wall portions 26. In this case, the wireless communication unit 15 is slidable in the front-rear direction.

[0096] [Variation 2] Next, a mounting member 260 of the wireless communication unit 15 as a second modification of the present invention will be described with reference to FIG.

[0097] Mounting member 260 is made of a plate-like member made of synthetic resin, with a lower end formed with holding portion 262 for wireless communication unit 15. Mounting plate 263 is attached to the upper end via pivot shaft 261 facing in the left-right direction, and mounting plate 263 is fixed to second hanging wall portion 24 with screw member N4, so that mounting plate 263 can rotate relative to second hanging wall portion 24 around pivot shaft 261.

[0098] Therefore, mounting member 260 is supported rotatably relative to second hanging wall portion 24 between a first position (position indicated by a solid line in FIG. 16) in which wireless communication unit 15 held by holding portion 262 of mounting member 260 stands up, and a second position (position indicated by a two-dot chain line in FIG. 16) in which wireless communication unit 15 lies down. Note that, in the second position, it is preferable that rotation be restricted by a holding mechanism (not shown).

[0099] [Variation 3] Next, a mounting member 360 for the wireless communication unit 15 as a third modification of the present invention will be described with reference to FIG.

[0100] Mounting member 360 is made of a plate-like member made of synthetic resin, with holding portion 362 for wireless communication unit 15 formed at its lower end, and its upper end is attached to second hanging wall portion 24 by screw members N5. In this manner, mounting member 360 may be fixed to second hanging wall portion 24. Although not shown in detail, second hanging wall portion 24 may be formed with a plurality of screw holes in the left-right direction into which screw members N5 are threaded, and mounting member 360 may be selectively attached to any one of the plurality of screw holes, thereby making the mounting position of mounting member 360 changeable in the left-right direction.

[0101] [Other variations] In the above embodiment, an example of an existing enclosure device is shown in which an enclosure device consisting of a concrete enclosure 2 and a metal lid mounting frame 3 fixed separately from the enclosure 2 is applied, but the present invention is not limited to this, and the enclosure 2 may be made of metal, and the lid mounting frame 3 may be made of synthetic resin. Also, the enclosure device may be one in which a mounting portion on which a lid can be placed is integrally formed in advance in an opening of an existing metal enclosure, and in this case, the lid 50 may be supported in the opening of the metal enclosure via a lid mounting adapter 20.

[0102] Furthermore, in the above embodiment, as an example of a radio wave transparent lid, a form in which a lid 50 formed from a synthetic resin material that is permeable to radio waves is used is exemplified, but the present invention is not limited to this, and the radio wave transparent lid is not limited to the material, etc., as long as it is configured to be permeable to radio waves, and various modifications are possible.

[0103] Furthermore, in the above embodiment, the lid mounting adapter 20 is exemplified as having a pivot shaft 28 formed thereon for pivotally supporting the lid body 50, but the present invention is not limited to this, and as long as the lid mounting adapter 20 can support the lid body 50 so as to be able to close at least the opening 20c of the lid mounting adapter 20, it is not necessarily required to have a mounting portion (e.g., horizontal surface portions 23d, 23f, 23h, etc.) or a pivot shaft 28.

[0104] In addition, in the above embodiment, the lid mounting adapter 20 is exemplified as having a cutout portion 27 that can accommodate a pivot shaft 8 protruding from an existing lid body mounting frame 3, but the present invention is not limited to this, and the adapter may also have a cutout portion or the like that can accommodate a lid body mounting portion 6 protruding from an existing lid body mounting frame 3.

[0105] Furthermore, although notches 27 were formed at the corners of long side 20a and short side 20b, it is sufficient if notches are provided at locations corresponding to the formation positions of protrusions (e.g., pivot shafts or lid mounting portions) on existing housing devices. For example, by preparing two types of lid mounting adapters, namely, a first type in which a notch is provided on one longitudinal end of long side 20a and a second type in which a notch is provided on one longitudinal end of short side 20b, it becomes possible to mount the lid mounting adapter regardless of whether the pivot shaft is provided on long side 20a or short side 20b.

[0106] Furthermore, in the above embodiment, the lid mounting adapter 20 is illustrated as being made of a metal material, but the present invention is not limited to this, and the lid mounting adapter 20 may be made of other materials such as synthetic resin.

[0107] Furthermore, in the above embodiment, in the process of replacing the metal lid body 7 placed on the lid body mounting frame 3 with the lid body 50, an example was given in which the lid mounting adapter 20 is attached and fixed to the lid body mounting frame 3, and then the lid body 50 is attached to the lid mounting adapter 20. However, the present invention is not limited to this, and the lid body 50 may be attached to the lid mounting adapter 20 in advance, and the lid mounting adapter 20 with the lid body 50 integrated therewith may be attached and fixed to the lid body mounting frame 3.

[0108] Furthermore, in the above embodiment, an example was given in which mounting member 60 for mounting wireless communication unit 15 to lid mounting adapter 20 is suspended from upright wall portion 26 provided below middle wall portion 23 of lid mounting adapter 20, but the present invention is not limited to this, and it may be mounted above horizontal surface portions 23d, 23f, 23h, which are the mounting portions of lid body 50 (for example, first hanging wall portion 22), or may be mounted to housing 2. Furthermore, as long as lid mounting adapter 20 is provided with middle wall portion 23 having at least horizontal surface portions 23d, 23f, 23h, it is not necessary to provide a portion below middle wall portion 23.

[0109] Furthermore, in the above embodiment, the lid mounting adapter 20 is exemplified as being fixed to the lid body mounting frame 3 by screw members N1 and N2, but the present invention is not limited to this, and although not specifically shown, for example, the lid mounting adapter 20 may have an elastic locking portion extending downward, so that when the lid mounting adapter 20 is fitted into the lid body mounting frame 3 from above, the elastic locking portion engages with the lid body mounting frame 3, thereby attaching the lid mounting adapter 20 to the lid body mounting frame 3.

[0110] Furthermore, in the above embodiment, an example has been given in which the lid mounting adapter 20 is fixed to the lid body mounting frame 3 with the screw members N1 and N2, but the present invention is not limited to this, and for example, the lid mounting adapter 20 may be fixed to the lid body mounting frame 3 by a method other than screw fastening (for example, locking). Furthermore, before fixing the lid mounting adapter 20 to the lid body mounting frame 3, the lid mounting adapter 20 may be fixed to the lid body mounting frame 3 in a temporarily fixed state using an adhesive material, a locking portion, or the like.

[0111] Furthermore, in the above-described embodiment, mounting members 60, 160, 260, and 360 are used as mounting members for wireless communication unit 15, but the present invention is not limited to this, and if there are other devices, mounting members or mounting portions for these devices, etc., may be provided in addition to wireless communication unit 15 for wireless communication of usage data, etc.

[0112] Although several embodiments and modifications of the present invention have been described, it is also possible to combine the embodiments and modifications as appropriate without departing from the gist of the present invention. [Explanation of symbols]

[0113] 1 Water meter box 2. Case 3 Lid mounting frame 6 Lid mounting portion (metallic lid mounting frame, protrusion) 7 Metal lid 8 Rotating shaft (protrusion) 10 Lid unit 11 Water Pipes 12 Water meter 13 Stop valve 15 Wireless communication unit 20 Lid mounting adapter 20a Long side (first side) 20b Short side (second side) 20c opening 21 Flange portion (first flange portion) 22 1st hanging wall section 23 Middle wall portion (second flange portion) 23d, 23f, 23h Horizontal part (lid mounting part) 23e, 23g Slope section (non-mounting section) 26 Vertical wall section (wireless communication unit mounting section) 27 Notch 28 Rotating shaft 29a Mounting slot (temporary fastening) 31 Mounting hole 50 Lid (radio wave transparent lid) 55 Opening restriction device 60, 160, 260, 360 Mounting parts C wiring

Claims

1. a lid mounting adapter that is attached to a lid mounting portion formed in an opening of an existing metal housing or to a metal lid mounting frame that is provided separately from the housing; a radio wave transparent lid supported via the lid mounting adapter, The lid mounting adapter is a first flange portion extending outward; and a second flange portion provided below the first flange portion and extending inward, The second flange portion has a mounting portion on which the radio wave transparent lid can be mounted.

2. A lid mounting adapter that is attached to a lid mounting portion formed in an opening of an existing metal housing or to a metal lid mounting frame that is provided separately from the housing; a radio wave transparent lid supported via the lid mounting adapter, The lid mounting adapter is a first flange portion extending outward, a second flange portion extending inward, and a notch portion formed in the existing metal casing or the metal lid mounting frame, capable of accommodating a protrusion for supporting the existing lid; The second flange portion has a mounting portion on which the radio wave transparent lid can be mounted.

3. The lid mounting adapter is 3. The lid unit according to claim 1, further comprising a rotation shaft that rotatably supports the radio wave transparent lid.

4. A lid body unit as described in claim 1 or 2, characterized in that the lid mounting adapter has an mounting portion for the metal housing or a wireless communication unit housed in the housing.

5. A lid replacement method for replacing a metal lid placed on a lid placement portion formed in an opening of an existing metal casing or a metal lid placement frame provided separately from the casing, comprising: removing the metal lid from the lid mounting portion or the metal lid mounting frame; a step of attaching a lid mounting adapter to the lid mounting portion or the metal lid mounting frame after the step of removing the metal lid; a step of attaching a radio wave transparent lid to the lid mounting adapter after the step of attaching the lid mounting adapter; A lid replacement method comprising:

Images