Meter unit

Abstract

To provide a meter unit capable of suppressing the labor required for fixing a base to a fixing surface.SOLUTION: The meter unit 11 comprises a base 13 capable of mounting a water meter 12. The base 13 has a predetermined length. A through-hole 41 is formed in the central part of the base 13 in the longitudinal direction. A bolt 42 is passed through the through-hole 41. The bolt 42 is screwed into an anchor embedded in a fixing surface 14 such as a floor. The base 13 is fixed to the fixing surface 14 through the fastening of the bolt 42 to the fixing surface 14. Thus, by performing the fastening of the bolt 42 to the fixing surface 14 only at the central part of the base 13 in the longitudinal direction, the base 13 can be fixed to the fixing surface 14, thereby suppressing the labor required for the fixing work.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] The amount of water used in a house or the like is measured by a water meter. Such a water meter is connected to the middle of the water pipes using a meter unit, for example, as shown in Patent Document 1. The meter unit has a base to which the water meter can be attached. The base has a set length. A through-hole is formed at each of both longitudinal ends of the base for passing a bolt through. The base is fixed to a fixed surface, such as a floor, by a bolt passing through the through-hole.

[0003] A primary piping unit to which the upstream piping of the water supply is connected and a secondary piping unit to which the downstream piping of the water supply is connected are attached to the base. A water meter can be installed between the primary piping unit and the secondary piping unit. By connecting the water meter to the primary piping unit and the secondary piping unit, respectively, the water meter is connected midway through the water supply piping.

[0004] The primary piping unit and the secondary piping unit are each provided with a valve that opens and closes to allow or prohibit the flow of water. When replacing the water meter, the valves of the primary piping unit and the secondary piping unit are closed, respectively, to prohibit the flow of water between the primary piping unit and the secondary piping unit. In this state, the water meter is replaced with a new one. After the new water meter is connected to the primary piping unit and the secondary piping unit, the valves of the primary piping unit and the secondary piping unit are each opened.

[0005] By connecting the water meter to the middle of the water pipe using the meter unit in this manner, it becomes easier to replace the water meter. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 6514058 Summary of the Invention [Problem to be solved by the invention]

[0007] In the meter unit of Patent Document 1, when fixing the base to a fixed surface, bolts must be passed through the through-holes formed at both ends of the base in the longitudinal direction, and then the bolts must be fastened to the fixed surface. For this reason, the bolts must be fastened to the fixed surface at both ends of the base in the longitudinal direction, which makes the work of fixing the base to the fixed surface more time-consuming. [Means for solving the problem]

[0008] The means for solving the above problems and their effects will be described below. The meter unit that solves the above problem includes a base to which a water meter can be attached, and the base can be fixed to a fixed surface by a bolt that penetrates the base. The base has a predetermined length. A through hole for passing the bolt through is formed in the center of the base in the longitudinal direction.

[0009] According to the above-mentioned configuration, the base is fixed to the fixing surface by passing a bolt through a through hole formed in the longitudinal center of the base and then fastening the bolt to the fixing surface. In this way, when fixing the base to the fixing surface, it is only necessary to fasten the bolt to the fixing surface at the longitudinal center of the base, so that it is possible to reduce the time and effort required for fixing the base to the fixing surface.

[0010] In the meter unit, the through hole penetrates between a first surface located on the fixed surface side of the base and a second surface located on the opposite side to the fixed surface side. Furthermore, a central portion of the base in the longitudinal direction of the first surface is located closer to the second surface than both ends of the base in the longitudinal direction of the first surface.

[0011] According to the above configuration, when the bolt passing through the through hole formed in the longitudinal center of the base is fastened to the fixing surface, the force pressing the first surface of the base, which is located at both ends of the base in the longitudinal direction, against the fixing surface is large. As a result, even if the bolt is fastened to the fixing surface at the longitudinal center of the base, both ends of the base in the longitudinal direction are unlikely to be displaced in the rotational direction around the bolt. As a result, the base fixed to the fixing surface by the bolt fastening is unlikely to rotate around the bolt, so that the base can be firmly fixed to the fixing surface even if the bolt is fastened to the fixing surface at the longitudinal center of the base.

[0012] In the meter unit, a through-hole for passing a bolt is formed at both longitudinal ends of the base, and a cover for closing the through-hole can be attached to both longitudinal ends of the base.

[0013] According to the above configuration, when the base is fixed to the fixed surface by the bolt, it is possible to use the through-holes formed in the longitudinal center of the base, instead of the through-holes formed in the longitudinal center of the base. That is, the base can be fixed to the fixed surface by passing the bolts through the through-holes formed in the longitudinal center of the base and fastening the bolts to the fixed surface. Furthermore, when the base is fixed to the fixed surface by using the through-holes formed in the longitudinal center of the base, it is possible to prevent the through-holes formed in the longitudinal center of the base from being mistakenly recognized as having no bolts through them by hiding the through-holes formed in the longitudinal center of the base with a cover. This makes it possible to prevent the through-holes from being used erroneously based on such a misconception. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a cross-sectional view showing the meter unit. [Diagram 2] 2 is an exploded perspective view showing a secondary piping main body and a meter receiver in the meter unit of FIG. 1. [Diagram 3] FIG. 3 is a side view showing the meter receiver of FIG. 2. [Figure 4] 2 is a plan view showing a base in the meter unit of FIG. 1. [Diagram 5] FIG. 5 is a bottom view showing the base of FIG. 4. [Figure 6] 2 is a perspective view showing a through-hole in the meter unit of FIG. 1 and a cover attached to the through-hole. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, one embodiment of the meter unit will be described with reference to FIGS. As shown in Fig. 1, meter unit 11 includes base 13 to which water meter 12 can be attached. Base 13 is made of die-cast aluminum and has a set length. Base 13 can be fixed to fixed surface 14 such as a floor with its longitudinal direction disposed approximately parallel to said fixed surface 14. When base 13 is fixed to fixed surface 14, a surface of base 13 facing fixed surface 14 becomes first surface 15, and a surface of base 13 opposite to the surface facing fixed surface 14 becomes second surface 16.

[0016] A primary piping unit 17 is attached to the second surface 16 of the base 13, at one end in the longitudinal direction of the base 13. An upstream piping of a water supply in a house or the like is connected to the primary piping unit 17. A secondary piping unit 18 is attached to the other end in the longitudinal direction of the base 13, at the second surface 16 of the base 13. A downstream piping of a water supply in a house or the like is connected to the secondary piping unit 18.

[0017] A water meter 12 can be installed between primary piping unit 17 and secondary piping unit 18. Water meter 12 is connected to primary piping unit 17 and secondary piping unit 18, respectively. In this way, water meter 12 is connected midway through the water piping. This water meter 12 measures the amount of water used in a house or the like.

[0018] <Primary piping unit 17> The primary piping unit 17 includes a pedestal 19 fixed by a bolt 19a to one end in the longitudinal direction of the second surface 16 of the base 13, i.e., the left end in FIG. 1. A mounting hole 20 is formed in the pedestal 19. The mounting hole 20 is formed so that its center line extends in the longitudinal direction of the base 13. A female thread 21 is formed on the inner circumferential surface of the mounting hole 20 on one side near the center of the base 13 in the longitudinal direction.

[0019] A cylindrical slide handle 22 is inserted from the end of the mounting hole 20 of the pedestal 19 near the center in the longitudinal direction of the base 13. A male thread 23 is formed on the outer circumferential surface of the slide handle 22. The male thread 23 meshes with the female thread 21 of the mounting hole 20. Therefore, the slide handle 22 moves toward or away from the center in the longitudinal direction of the base 13 by rotating about its center line. A packing 24 is attached to the opening of the slide handle 22 near the center in the longitudinal direction of the base 13.

[0020] One end of an elbow 25 is inserted into one side of the inner peripheral surface of the mounting hole 20 near the end of the base 13 in the longitudinal direction. One end of the elbow 25 is located between the inner peripheral surface of the base 19 and the outer peripheral surface of the slide handle 22. The elbow 25 is curved so that the opening direction of one end and the opening direction of the other end are oriented in different directions. The elbow 25 can rotate relatively to the base 19 and the slide handle 22 around the center line of the opening of one end of the elbow 25. Such relative rotation of the elbow 25 with respect to the base 19 can be permitted or prohibited by tightening or loosening a screw 26 screwed into the base 19.

[0021] A stop valve 28 is connected to the other end of the elbow 25 via a pressure reducing valve 27. This stop valve 28 can be connected to an upstream pipe in a water supply for a house or the like. The pressure reducing valve 27 reduces the pressure of water flowing from the above pipe to the primary piping unit 17. The stop valve 28 can expand and contract relative to the pressure reducing valve 27 depending on the connection position with the above pipe. The stop valve 28 is provided with a valve 29 that opens and closes to allow or prohibit water to pass between the above pipe and the pressure reducing valve 27.

[0022] <Secondary piping unit 18> The secondary piping unit 18 includes a secondary piping body 30 fixed to the other end in the longitudinal direction of the second surface 16 of the base 13, i.e., the right end in FIG. 1, by a bolt 30a. A mounting hole 31 is formed in the secondary piping body 30. The mounting hole 31 is formed so as to extend on the same axis as the mounting hole 20 of the base 19.

[0023] A header 32 is inserted from one end of the mounting hole 31 of the secondary piping body 30 in the longitudinal direction of the base 13, i.e., the right end in Fig. 1. The header 32 is for connecting the inside of the mounting hole 31 of the secondary piping body 30 to downstream piping of a water supply in a house or the like, for example, a water supply pipe and a hot water supply pipe. The header 32 is formed with a port 33 connected to the water supply pipe and a port 34 connected to the hot water supply pipe via a header valve 35. The header valve 35 opens and closes to permit or prohibit the passage of water between the hot water supply pipe and the port 34 of the header 32.

[0024] A cylindrical receiving member 36 is inserted into the other longitudinal end of the base 13 in the mounting hole 31, i.e., the left end in Fig. 1. A check valve 37 is disposed inside the receiving member 36. The check valve 37 allows water to flow from inside the receiving member 36 toward the header 32 and prohibits water from flowing in the opposite direction. A packing 38 is attached to the opening of the receiving member 36 on the side opposite to the opening on the header 32 side.

[0025] 2 and 3, a protrusion 39 is formed on the inner peripheral surface of the mounting hole 31 in the secondary piping main body 30, and a groove 40 capable of accommodating the protrusion 39 is formed on the outer peripheral surface of the receiving member 36. The groove 40 extends spirally around the center line of the receiving member 36 on the outer peripheral surface of the receiving member 36. The protrusion 39 and the groove 40 serve to guide the receiving member 36 when it is inserted into the mounting hole 31 of the secondary piping main body 30, and also serve to prevent the receiving member 36 inserted into the mounting hole 31 from slipping out of the mounting hole 31.

[0026] When the receiving member 36 is inserted into the mounting hole 31 of the secondary piping body 30, the projection 39 of the mounting hole 31 is accommodated in the groove 40 of the receiving member 36. When the receiving member 36 is rotated around its center line in this state, the projection 39 slides along the groove 40 and the receiving member 36 is inserted into the mounting hole 31 while rotating spirally. The receiving member 36 thus inserted into the mounting hole 31 is prevented from coming out of the mounting hole 31 by the projection 39 accommodated in the groove 40. The receiving member 36 inserted into the mounting hole 31 can be removed from the secondary piping body 30 by rotating in the opposite direction to that used for inserting the receiving member 36 into the mounting hole 31.

[0027] <Detailed structure of Base 13> Figures 4 and 5 respectively show the base 13 as viewed from above and below in Figure 1. The width of the longitudinal center of the base 13, i.e., the length in the up-down direction in Figures 4 and 5, is larger than the width of both longitudinal ends of the base 13. In more detail, the distance between both widthwise side walls 13a at the longitudinal center of the base 13 is larger than the width of both longitudinal ends of the base 13. A through hole 41 is formed in the longitudinal center of the base 13.

[0028] 1, the through hole 41 penetrates between the first surface 15 and the second surface 16 of the base 13. The opening of the through hole 41 on the second surface 16 side opens into a seat surface 16a formed on the second surface 16. A portion of the second surface 16 of the base 13 corresponding to the center of the base 13 in the longitudinal direction is inclined so that the distance from the first surface 15 becomes shorter as it approaches the through hole 41. A rib 61 extending in the longitudinal direction of the base 13 is formed in the second surface 16 near the through hole 41.

[0029] The through hole 41 allows the bolt 42 to pass through. The bolt 42 that passes through the through hole 41 is screwed by an impact driver into an anchor that is driven into a floor or the like that forms the fixed surface 14. This fixes the base 13 to the fixed surface 14. At this time, the head of the bolt 42 contacts the seat surface 16a via the washer 65. The seat surface 16a has a larger diameter than the head of the bolt 42. Therefore, by using a washer 65 with a larger diameter than usual, it is possible to suppress deformation of the area around the through hole 41 in the base 13 when the bolt 42 is tightened by the impact driver.

[0030] As shown in FIG. 5, flanges 62 extending in the longitudinal direction of the base 13 are formed at the center of the longitudinal direction of the base 13 on both side surfaces in the width direction of the base 13 so as to protrude from the both side surfaces. The flanges 62 are positioned near the first surface 15 of the base 13 on both side surfaces in the width direction of the base 13, thereby forming the first surface 15. In addition, ribs 63 and 64 are formed on the first surface 15. The rib 63 surrounds the periphery of the through hole 41 and extends in the longitudinal direction of the base 13. The rib 64 is connected to the rib 63 and extends so as to approach the end of the longitudinal direction of the base 13. The rib 64 is shaped to branch into two in the width direction of the base 13, and the closer to the end of the longitudinal direction of the base 13, the longer the distance between them in the width direction.

[0031] When the base 13 is fixed to the fixing surface 14 and when the water meter 12 is assembled between the primary piping unit 17 and the secondary piping unit 18, the deformation of the base 13 is suppressed by the above-mentioned structures (a) to (e) below. (a) A rib 61 is formed on the second surface 16 of the base 13. (b) A rib 63 and a rib 64 are formed on the first surface 15 of the base 13. (c) A flange 62 is formed on both widthwise sides at the longitudinal center of the base 13. (d) The distance between both widthwise side walls 13a at the longitudinal center of the base 13, i.e., both side walls 13a connected to the flanges 62, is greater than the width of both longitudinal ends of the base 13. (e) The bearing surface 16a of the second surface 16 of the base 13 has a larger diameter than the head of the bolt 42.

[0032] 1, drainage recesses 47 are formed in the first surface 15 of the base 13 at locations corresponding to both ends of the base 13 in the longitudinal direction. Protrusions 48 protruding toward the fixing surface 14 are formed in the first surface 15 at locations corresponding to both ends of the base 13 in the longitudinal direction and closer to the center in the longitudinal direction than the recesses 47. By forming the protrusions 48 in the first surface 15 at locations corresponding to both ends of the base 13 in the longitudinal direction, the center of the base 13 in the longitudinal direction on the first surface 15 is located closer to the second surface 16 than both ends in the longitudinal direction.

[0033] A meter receiver 43 is attached to the second surface 16 of the base 13, and a reverse-insertion prevention protrusion 44 is integrally formed thereon. The water meter 12 can be placed on the meter receiver 43 and the reverse-insertion prevention protrusion 44.

[0034] The meter receiver 43 is attached to a location on the second surface 16 between the base 19 of the primary piping unit 17 and the secondary piping main body 30 of the secondary piping unit 18, near the base 19. The meter receiver 43 is removable from the second surface 16. This is to prevent the meter receiver 43 from getting in the way when removing the slide handle 22 from the mounting hole 20 of the base 19. The slide handle 22 is removed from the mounting hole 20 of the base 19 when, for example, replacing the packing 24 of the slide handle 22.

[0035] The water meter 12 is connected to connect the primary piping unit 17 and the secondary piping unit 18. The direction of water flow passing through the water meter 12 is fixed. Therefore, the water meter 12 must be connected to the primary piping unit 17 and the secondary piping unit 18 with its upstream and downstream correctly positioned relative to the primary piping unit 17 and the secondary piping unit 18. The reverse connection prevention protrusion 44 is intended to prevent the water meter 12 from being connected to the primary piping unit 17 and the secondary piping unit 18 with the upstream and downstream reversed.

[0036] In detail, when water meter 12 is to be placed between primary piping unit 17 and secondary piping unit 18 with the upstream and downstream reversed, it comes into contact with reverse-installation prevention protrusion 44, making it impossible to place water meter 12 between primary piping unit 17 and secondary piping unit 18. Water meter 12 also includes a reference piece 45 that is positioned corresponding to reverse-installation prevention protrusion 44 when water meter 12 is placed between primary piping unit 17 and secondary piping unit 18 with the upstream and downstream correct. Reverse-installation prevention protrusion 44 is formed with an accommodation groove 46 capable of accommodating reference piece 45 at this time.

[0037] Therefore, the reference piece 45 of the water meter 12 is accommodated in the accommodation groove 46 of the reverse-insertion prevention protrusion 44 only when the water meter 12 is to be arranged between the primary piping unit 17 and the secondary piping unit 18 so that the upstream and downstream directions are correct. This makes it possible to arrange the water meter 12 between the primary piping unit 17 and the secondary piping unit 18. At this time, the portion of the water meter 12 closer to the primary piping unit 17 is placed on the meter receiver 43, so that the upstream end of the water meter 12, i.e., the left end in FIG. 1, is aligned with the slide handle 22 of the primary piping unit 17. With the water meter 12 arranged in this manner, the water meter 12 is connected to the primary piping unit 17 and the secondary piping unit 18.

[0038] More specifically, with the water meter 12 disposed between the primary piping unit 17 and the secondary piping unit 18, the slide handle 22 of the primary piping unit 17 is rotated about its axis to move the slide handle 22 toward the secondary piping unit 18. This causes the packing 24 of the slide handle 22 to be pressed against the upstream end of the water meter 12. At the same time, the water meter 12 is pressed toward the secondary piping unit 18, so that the downstream end of the water meter 12, i.e., the right end in FIG. 1 , is pressed against the packing 38 of the receiving member 36 in the secondary piping unit 18.

[0039] In this way, the water meter 12 is connected to the primary piping unit 17 and the secondary piping unit 18. When removing the water meter 12 connected to the primary piping unit 17 and the secondary piping unit 18, the procedure is reversed from the procedure for connection described above. When replacing the water meter 12 with a new one, the valve 29 of the stop valve 28 in the primary piping unit 17 is closed, and the header valve 35 in the secondary piping unit 18 is closed. In this state, the old water meter 12 connected to the primary piping unit 17 and the secondary piping unit 18 is removed, and then the new water meter 12 is connected to the primary piping unit 17 and the secondary piping unit 18. Then, the valve 29 of the stop valve 28 in the primary piping unit 17 and the header valve 35 in the secondary piping unit 18 are opened.

[0040] When the water meter 12 is connected to the primary piping unit 17 and the secondary piping unit 18, a reaction force from the water meter 12 acts on the primary piping unit 17 and the secondary piping unit 18. As a result, a force acts on the portions of the base 13 to which the primary piping unit 17 and the secondary piping unit 18 are attached in a direction that tends to widen those portions based on the reaction force. Adopting the above-mentioned structures (a) to (e) contributes to ensuring the strength of the base 13 against such forces. Furthermore, adopting the following structure (f) also contributes to ensuring the strength of the base 13. (f) The portion of the second surface 16 corresponding to the longitudinal center of the base 13 is inclined so that the distance between the portion and the first surface 15 becomes shorter as it approaches the through hole 41.

[0041] 4 and 5, a through-portion 49 through which a bolt 42 (FIG. 1) can be passed is formed at each of both longitudinal ends of the base 13. Both longitudinal ends of the base 13 are plate-shaped. The through-portion 49 is formed at both longitudinal ends of the base 13 formed in a plate shape so as to be recessed from the end face toward the center of the base 13 in the longitudinal direction.

[0042] As shown in FIG. 6, the longitudinal end of the base 13 around the through-hole 49 is recessed from the first surface 15 toward the second surface 16. A cover 50 for closing the through-hole 49 can be attached to both longitudinal ends of the base 13. The cover 50 includes an insertion portion 51, a concealing portion 52, and a hooking portion 53. The insertion portion 51 is inserted into the through-hole 49 from the longitudinal end face side of the base 13. In the penetration direction of the insertion portion 51 relative to the through-hole 49, one end of the insertion portion 51 is connected to the concealing portion 52, and the other end of the insertion portion 51 is connected to the hooking portion 53.

[0043] The concealing portion 52 and the hooking portion 53 are formed in a plate shape. When the inserting portion 51 is inserted into the through portion 49, the concealing portion 52 contacts the second surface 16 side of the longitudinal end of the base 13, and the hooking portion 53 contacts the first surface 15 side of the end. The cover 50 is attached to the longitudinal end of the base 13 by inserting the inserting portion 51 into the through portion 49. When the cover 50 is attached to the longitudinal end of the base 13, the through portion 49 is blocked by the concealing portion 52 of the cover 50 so that it cannot be seen from the outside. At this time, the hooking portion 53 of the cover 50 enters a portion around the through portion 49 at the longitudinal end of the base 13, which is recessed from the first surface 15 toward the second surface 16.

[0044] Next, the effects of the meter unit 11 of this embodiment will be described. (1) The base 13 is fixed to the fixing surface 14 by passing a bolt 42 through a through hole 41 formed in the longitudinal center of the base 13 and then fastening the bolt 42 to the fixing surface 14. When fixing the base 13 to the fixing surface 14 in this manner, it is only necessary to fasten the bolt 42 to the fixing surface 14 at the longitudinal center of the base 13, so that the work of fixing the base 13 to the fixing surface 14 can be reduced.

[0045] (2) The center of the first surface 15 of the base 13 in the longitudinal direction is located closer to the second surface 16 than both ends of the first surface 15 of the base 13 in the longitudinal direction. According to this configuration, when the bolt 42 passing through the through hole 41 formed in the longitudinal center of the base 13 is fastened to the fixed surface 14, the force pressing the first surface 15 of the base 13 at both ends of the base 13 in the longitudinal direction against the fixed surface 14 is increased. As a result, even if the fastening of the bolt 42 to the fixed surface 14 is performed in the longitudinal center of the base 13, both ends of the base 13 in the longitudinal direction are unlikely to be displaced in the rotational direction around the bolt 42. As a result, the base 13 fixed to the fixed surface 14 by the bolt fastening is unlikely to rotate around the bolt 42, so that the base 13 can be firmly fixed to the fixed surface 14 even if the fastening of the bolt 42 to the fixed surface 14 is performed in the longitudinal center of the base 13.

[0046] (3) At both ends in the longitudinal direction of the base 13, through-holes 49 for passing the bolts 42 are formed. Therefore, when fixing the base 13 to the fixing surface 14 with the bolts 42, it is possible to use the through-holes 49 formed at both ends in the longitudinal direction of the base 13 instead of using the through-holes 41 formed at the center of the longitudinal direction of the base 13. That is, after removing the cover 50 from both ends in the longitudinal direction of the base 13, the bolts 42 can be passed through the through-holes 49 formed at both ends, and the bolts 42 can be fastened to the fixing surface 14 to fix the base 13 to the fixing surface 14. Also, when fixing the base 13 to the fixing surface 14 using the through-holes 41 formed at the center of the longitudinal direction of the base 13, the covers 50 are attached to both ends in the longitudinal direction of the base 13. As a result, the through-holes 49 formed at both ends in the longitudinal direction of the base 13 can be hidden by the covers 50, so that it is possible to suppress the misconception that the bolts 42 are not passed through the through-holes 49. This can prevent the through portion 49 from being used incorrectly based on such a misconception.

[0047] The above embodiment can be modified, for example, as follows: The above embodiment and the following modified examples can be combined with each other to the extent that no technical contradiction occurs. The through holes 49 do not necessarily have to be formed.

[0048] Although the central portion of base 13 in the longitudinal direction on first surface 15 of base 13 is positioned closer to second surface 16 than both ends of base 13 in the longitudinal direction on first surface 15, this is not necessarily required.

[0049] The base 13 does not necessarily have to be made of die-cast aluminum. The fixed surface 14 may be on a base that is raised above the floor. [Explanation of symbols]

[0050] 11...meter unit, 12...water meter, 13...base, 13a...side wall, 14...fixing surface, 15...first surface, 16...second surface, 16a...seat, 17...primary piping unit, 18...secondary piping unit, 19...base, 19a...bolt, 20...mounting hole, 21...female thread, 22...slide handle, 23...male thread, 24...packing, 25...elbow, 26...screw, 27...pressure reducing valve, 28...stop valve, 29...valve, 30...secondary piping body, 30a...bolt, 31...mounting Hole, 32...header, 33...port, 34...port, 35...header valve, 36...receiving member, 37...check valve, 38...packing, 39...protrusion, 40...groove, 41...through hole, 42...bolt, 43...meter receiver, 44...anti-reverse insertion protrusion, 45...reference piece, 46...accommodating groove, 47...recess, 48...convex portion, 49...through portion, 50...cover, 51...insertion portion, 52...concealing portion, 53...hook portion, 61...rib, 62...flange, 63...rib, 64...rib, 65...washer.

Claims

1. A meter unit having a base to which a water meter can be attached, the base being capable of being fixed to a fixing surface by a bolt penetrating the base, the base has a defined length; The meter unit has a through hole formed in a longitudinal center portion of the base for passing the bolt therethrough.

2. the through hole penetrates between a first surface located on the fixing surface side of the base and a second surface located on the opposite side to the fixing surface side, The meter unit according to claim 1 , wherein a central portion of the first surface in a longitudinal direction of the base is located closer to the second surface than both end portions of the first surface in the longitudinal direction of the base.

3. a through-portion for passing the bolt therethrough is formed at each end of the base in the longitudinal direction; 3. The meter unit according to claim 1, wherein covers for closing the through-holes can be attached to both longitudinal ends of the base.

Images