JP2022113352A - Water meter and lid locking structure of the same - Google Patents

Abstract

To provide a technique capable of suppressing variations in locking force for locking a lid body in a closed state more than before.SOLUTION: In a water meter 10, a lid side locking portion 35T and a meter side locking portion 51 that engage with each other to lock a lid body 30 in a closed state are arranged at a position immediately below a rotation shaft J1 of the lid body 30, and an engagement portion for locking the lid body in the closed state is closer to the rotation shaft than before, so that variations in locking force can be suppressed. In addition, even when the lid body 30 is opened, the meter side locking portion 51 is hidden behind the lid body 30 and does not protrude at a position away from the lid body 30 of an upper surface 10G of the water meter 10 as a conventional locking piece, so that it is prevented from coming into contact with foreign matters to be damaged as the conventional locking piece, and thus durability is improved. Further, since the conventional locking piece is eliminated, an area usable on the upper surface 10 G of the water meter 10 increases, and thereby a meter display portion 40 can be wider than before and a printing section 21R can be provided on the upper surface 10G.SELECTED DRAWING: Figure 7

Description

TECHNICAL FIELD The present disclosure relates to a water meter in which a rotating lid is locked in a closed state and a lid locking structure thereof.

In a conventional water meter, a locking piece protruding from the upper surface is locked to an end portion of the lid away from the pivot shaft, and the lid is locked in the closed state (see, for example, Patent Document 1). ).

JP 2005-292096 (paragraph [0067], Figure 1)

However, in the above-described conventional water meters, the locking force for locking the lid body in the closed state varies, and a countermeasure is required.

In order to solve the above-mentioned problems, the first aspect of the invention is to provide a lid body that is hinged to the upper part of a water meter and rotates about a horizontal rotation axis, and that is attached to the meter display part on the upper surface of the water meter. In a water meter lid locking structure for locking in a closed state covering a water meter, a position of the lid in the closed state in the vicinity of just below the pivot shaft, and an upper surface of the water meter in the vicinity of just below the pivot shaft a lid-side locking portion and a meter-side locking portion formed at and facing each other in a tangential direction of a circle centered on the rotation shaft for locking the lid body in the closed state; an elastic deformation portion that supports the side locking portion or the meter side locking portion and elastically deforms as the lid side locking portion and the meter side locking portion are in sliding contact when the lid body is rotated; , and a cover locking structure for a water meter.

According to the invention of claim 2, the elastically deformable part is formed in the lid and has a beam-like shape extending substantially horizontally in the closed state, and the lid-side locking part is provided on the lower surface of the water supply. This is a meter cover locking structure.

According to a third aspect of the present invention, there is provided a cover locking structure for a water meter according to claim 2, wherein the elastically deformable portion is formed by separating a part of the cover in the form of a beam by means of a vertical through hole penetrating vertically. be.

The invention according to claim 4 comprises: a cap-shaped or plate-shaped lid main body provided in the lid and overlapping the upper surface of the water meter in the closed state; and a meter-side connecting portion projecting from the upper surface of the water meter and arranged between the pair of lid-side connecting portions on the side of the lid main body. and a pair of hinge protrusions protruding from the pair of lid-side connecting portions in a direction approaching each other and arranged on the rotating shaft, and recessed portions formed on both side surfaces of the meter-side connecting portion to form the one a pair of hinge recesses for rotatably receiving the pair of hinge projections, wherein the lid-side engaging portion and the elastic deformation portion are arranged below one or both of the lid-side connecting portions. A water meter cover locking structure according to any one of claims 1 to 3.

According to a fifth aspect of the present invention, the meter-side connecting portion and the lid-side connecting portion protrude upward from the lid body portion in the closed state and have the rotation shaft at their upper ends. This is a meter cover locking structure.

According to the sixth aspect of the invention, both side surfaces of the meter-side connecting portion are bent in an L shape, one end of which communicates with the lower portion of the pair of hinge recesses, and the other end of which opens to the outer surface of the meter-side connecting portion. A pair of guide grooves and a narrowed portion communicating between each of the guide grooves and each of the hinge recesses and having an opening width smaller than the inner diameter of the hinge recesses are provided, and the pair of hinge projections are cylindrical. 6. The water supply according to claim 4 or 5, which has a structure having a flat cut surface on the outer peripheral surface of the lid body, and the cut surface is substantially parallel to the vertical direction and passes through the narrowed portion when the lid main body is in an upright state. This is a meter cover locking structure.

The invention according to claim 7 is characterized in that the meter-side connecting portion is provided with an open position stopper portion that abuts when the cover rotates 120 to 180 degrees from the closed state. The water meter cover locking structure according to claim 1.

According to the eighth aspect of the present invention, a printing portion for laser-marking identification information of the water meter is provided on the upper surface of the water meter at a position covered by the closed lid. The water meter cover locking structure according to any one of claims.

According to a ninth aspect of the invention, there is provided a water meter having the water meter cover locking structure according to any one of the first to eighth aspects.

In the structures of claims 1 and 9, the lid-side locking portion and the meter-side locking portion that engage with each other to lock the lid in the closed state are arranged in the vicinity of just below the pivot shaft of the lid. Since the engaging portion is closer to the rotating shaft than in the conventional water meter cover locking structure, variations in locking force can be suppressed. In addition, since the conventional locking piece, which is arranged on the upper surface of the water meter at a position away from the rotation shaft, can be eliminated, the usable area on the upper surface of the water meter increases accordingly. As a result, the meter display section can be made wider than before, and a printing section for laser marking can be provided on the upper surface of the water meter.

In the water meter cover locking structure of claim 2, since the elastically deformable portion is in the shape of a beam extending substantially horizontally, the elastically deformable portion does not have an undercut shape when the cover is molded. , it can be manufactured at a lower cost than the conventional one having an undercut-shaped locking piece. In addition, the elastically deformable portion may have a cantilever shape or a double-supported beam shape.

Here, the elastically deformable portion may protrude from the outer surface of the lid. In this configuration, the elastically deformable portion is protected by the wall portions facing each other with the upper and lower through-holes interposed therebetween. Further, according to the fourth aspect of the invention, since the lid is provided with a pair of hinge projections, the undercut shape is not formed as in the case where the lid-side connecting portion is provided with a pin hole, for example. It can be manufactured inexpensively.

According to the configuration of claim 5, the lid-side connecting portion and the meter-side connecting portion protrude upward from the lid main body portion in the closed state, and have the rotation shaft at the upper end thereof. and the meter-side locking portion is separated from the rotation shaft, and the distance between the lid-side locking portion and the meter-side locking portion increases as the lid rotates, and the lid-side locking portion and the meter-side locking portion become longer. It is possible to smoothly engage with the locking portion.

In the water meter of claim 6, by changing the posture of the lid, the pair of hinge projections of the lid can be rotatably engaged with the pair of hinge recesses of the meter body. work becomes easier.

According to the configuration of claim 7, the lid body is maintained in the open state by abutting against the open position stopper portion when rotated 120 to 180 degrees from the closed state, thereby ensuring the visibility of the meter display portion. , the operation of returning to the closed state can be easily performed. In addition, since the back surface of the lid can be easily seen, the back surface of the lid can be used as a printing portion, a sticker attaching portion, or the like.

1 is a perspective view of a water meter according to an embodiment of the present disclosure; FIG. Top view of upper wall of water meter Perspective view of the top of the water meter (A) Side view, (B) front cross-sectional view of the meter side connection part (A) Perspective view from above, (B) Perspective view from below Top view of lid Side cross-sectional view of the upper part of the water meter and the lid in the closed state Side cross-sectional view of the upper part of the water meter and the cover in the open state

An embodiment of a water meter 10 having the lid locking structure of the present disclosure will be described below with reference to FIGS. 1 to 8. FIG. A water meter 10 of the present embodiment shown in its entirety in FIG. 1 is, for example, an impeller type, and a cylindrical meter case 12 accommodates an impeller (not shown). A pair of connection pipes 12A and 12B extend laterally from the meter case 12, and water pipes are connected to their distal ends. The impeller rotates according to the flow rate of tap water flowing through the water pipe.

A measurement unit 40U is superimposed on the meter case 12 . A cylindrical unit cover 13 whose diameter increases downward is fitted to the outside of the measurement unit 40U, and its lower end is fitted and fixed to the upper end of the meter case 12 . A measurement unit 40U is sandwiched and fixed between the upper wall portion 20 of the unit cover 13 and the meter case 12 . Further, the upper wall portion 20 is formed with a display opening 20A for making the meter display portion 40 provided on the upper surface of the measurement unit 40U visible. The meter display section 40 displays the flow rate of tap water calculated by a circuit in the measurement unit 40U based on the amount of rotation of the impeller.

Although the water meter 10 of the present embodiment is an impeller type, the technology of the present disclosure is applied to, for example, an electromagnetic water meter called an electromagnetic flowmeter and a vortex type water meter called a vortex flowmeter. You may

By the way, since the upper wall portion 20 of the unit cover 13 is positioned above the water meter 10, it is also the upper wall portion 20 of the water meter 10, and the upper surface of the upper wall portion 20 is also the upper surface 10G of the water meter 10. A cover 30 is rotatably connected to the upper portion of the water meter 10 in order to cover the meter display portion 40 on the upper surface 10G of the water meter 10 when not in use. The structure for connecting the lid bodies 30 will be described in detail below.

The upper wall portion 20 is manufactured separately from the tubular wall 13A of the unit cover 13 by, for example, resin injection molding, and is fixed to the upper portion of the tubular wall 13A. The upper surface 10G of the water meter 10, which is also the upper surface of the upper wall portion 20, has a circular shape as a whole as shown in FIG. 2nd area|region R2 is partitioned off. The wide first region R<b>1 is covered with the lid 30 .

Hereinafter, on the upper surface 10G of the water meter 10, the direction parallel to the boundary line L1 is referred to as the "horizontal direction", and the horizontal direction perpendicular to the boundary line L1 is referred to as the "front-rear direction". Further, in the front-rear direction, the side facing the first region R1 from the boundary line L1 is called the "front side", and the opposite side is called the "rear side". The right side (the right side in FIG. 2) when viewing the upper surface 10G of the water meter 10 in front of R2 is simply referred to as the "right side", and the opposite side is simply referred to as the "left side".

The aforementioned display opening 20A is arranged near the boundary line L1 in the first region R1 and extends in the horizontal direction. Further, the meter display unit 40 in the display opening 20A is covered with transparent glass, and displays the measurement result of the flow rate with the side closer to the boundary line L1 facing up. The measurement result of the flow rate may be displayed with one end side of the meter display section 40 in the longitudinal direction facing up.

The entire first region R1 excluding the display opening 20A is a flat surface, and the front side of the flat surface from the display opening 20A is a printing portion 21R. The identification information of the water meter 10 is laser-marked on the printed portion 21R, for example. A sticker printed with the identification information of the water meter 10 may be attached to the printing portion 21R.

As shown in FIG. 3, the second region R2 is provided with a meter-side connecting portion 50 for rotatably supporting the lid 30. As shown in FIG. The meter-side connecting portion 50 has a shape in which a pair of side protrusions 22 are provided on both side surfaces of a block 50H that protrudes in a stepped manner from a laterally intermediate portion of the second region R2. The pair of side protrusions 22 protrude in a stepped manner on the entire front side from intermediate positions in the front-rear direction on both side surfaces of the meter-side connecting portion 50 . Although the block 50H is molded separately from the entire top wall portion 20 and then fixed to the entire top wall portion 20, the block 50H may be integrally molded with the entire top wall portion 20. .

A pair of hinge recesses 23 are formed in the upper part of the lateral side surfaces of the pair of side projections 22 (which are also the side surfaces of the meter-side connecting portion 50). The pair of hinge recesses 23 has a circular cross-section, and their central axes form the rotation axis J1 of the lid body 30 and extend parallel to the boundary line L1.

An L-shaped introduction groove 24 is formed in the side surface of each side projection 22 below the hinge recess 23, and the upper end of the introduction groove 24 is connected to the lower part of the hinge recess 23, while the lower end is side-mounted. The front surface (which is also the front surface 50B of the meter-side connecting portion 50) facing the first region R1 side of the projecting portion 22 is open.

As shown in FIG. 4A, a narrowed portion 24T that is narrower than the diameter of the hinge concave portion 23 is formed between the hinge concave portion 23 and the introduction groove 24. As shown in FIG. Specifically, both inner side surfaces of the front end portion of the introduction groove 24 are horizontal surfaces facing each other. The lower inner surface of the front end of the introduction groove 24 is bent at a right angle and extends upward, and is continuous with the inner peripheral surface of the hinge recess 23 at a position spaced rearward from the rotation axis J1 by the radius of the hinge recess 23. is doing. On the other hand, the upper inner surface of the front end portion of the introduction groove 24 is folded back below the rotation shaft J<b>1 and continues to the lower portion of the inner peripheral surface of the hinge recess 23 .

As shown in FIG. 4B, a weir portion 24S protrudes from the bottom surface of the upper portion of the introduction groove 24 (that is, the bottom surface of the throttle portion 24T). An inner side surface of the hinge recess 23 is formed on the upper portion of the dam portion 24S, and an inclined surface 24U inclined with respect to the vertical direction is formed on the lower portion of the dam portion 24S.

Note that, as shown in FIG. 3, the front surface 50B of the meter-side connecting portion 50 including the front surfaces of the pair of side protrusions 22 is substantially vertical, and the meter side including the upper surfaces of the pair of side protrusions 22 is substantially vertical. An upper surface 50A of the connecting portion 50 is substantially horizontal. A corner portion between the front surface 50B and the upper surface 50A of the meter-side connecting portion 50 is formed with an arc-shaped chamfered surface.

Both lateral portions of the meter-side connecting portion 50 in the second region R2 form embankment portions 52 that are stepped higher than the upper surface of the first region R1. The bank portion 52 extends laterally and has the same width as the side protrusions 22 in the front-rear direction. Further, as shown in FIG. 2, the meter-side connecting portion 50 described above is arranged slightly to the right in the lateral direction of the second region R2, and is engaged with the embankment portion 52 on the left side of the meter-side connecting portion 50. A groove 25M is formed. The engagement groove 25M is located in the center of the bank portion 52 in the width direction and extends parallel to the rotation axis J1. Further, as shown in FIG. 4A, corners between the pair of inner side surfaces of the engaging groove 25M and the upper surface of the bank portion 52 are chamfered in an arc shape. A wall portion of the bank portion 52 having an inner surface on the front side (first region R1 side) of the engagement groove 25M is a meter-side locking portion that engages with a lid-side locking portion 35T described later of the lid body 30. It has become 51. A corner portion between the upper surface of the bank portion 52 and the front surface of the bank portion 52 is not chamfered and has a so-called pin angle.

Next, the structure of the lid 30 will be explained in detail. The lid 30 is integrally formed as a whole by injection molding of resin. As shown in FIG. 7, the state in which the lid 30 abuts on the top surface 10G of the water meter 10 and covers the meter display unit 40 is called a closed state. , “lower surface” and the like are simply referred to as “upper surface”, “lower surface” and the like.

As shown in FIG. 5A, the lid body 30 has a lid main body portion 31 whose planar shape is substantially the same as that of the first region R1. The lid main body 31 has a structure in which a flat plate wall 31A and an arcuate wall 31B hang down from the outer edge of a cut circular top plate 31F that is one size smaller than the first region R1, and has a flat cap shape as a whole. . As shown in FIG. 7, the flat plate wall 31A hangs vertically downward from the linear outer edge of the top plate 31F, while the arcuate wall 31B extends downward from the arcuate outer edge of the top plate 31F. It hangs down to the outside according to the The lower surfaces of the flat plate wall 31A and the arcuate wall 31B form a flush horizontal surface and abut against the outer edge of the first region R1 on the upper surface 10G of the water meter 10. As shown in FIG. A front end protrusion 30S protrudes forward from the lower end of the front end of the arc wall 31B. A fingertip can be put on the portion 30S.

As shown in FIG. 5A, a pair of lid-side connecting portions 32 and 33 are provided at both lateral end portions of the rear portion of the lid body portion 31 . The pair of lid-side connecting portions 32 and 33 protrude rearward from the rear surface of the lid main body portion 31 (that is, the outer surface of the flat plate wall 31A) and protrude upward from the upper surface of the lid main body portion 31 . Further, as shown in FIG. 5B, the lower surfaces of the pair of lid-side connecting portions 32 and 33 are located above the lower surface of the flat plate wall 31A. Furthermore, the left lid-side connecting portion 32 is laterally wider than the right lid-side connecting portion 33 corresponding to the left and right bank portions 52 of the upper surface 10G of the water meter 10 (FIG. 6). reference).

As shown in FIG. 5A, the surfaces of the pair of lid-side connecting portions 32 and 33 facing each other are vertical surfaces parallel to each other. A pair of hinge protrusions 34 protrude. A pair of hinge projections 34 are formed by horizontally cutting the lower portion of a cylindrical body extending horizontally to form a flat surface 34H, which has a D-shaped cross section. The outer diameter of the pair of hinge protrusions 34 is substantially the same as the inner diameter of the pair of hinge recesses 23 described above, and the pair of hinge protrusions 34 are received in the hinge recesses 23 to form a cover. 30 is rotatably supported above the water meter 10 .

Here, in order to receive the pair of hinge projections 34 in the pair of hinge recesses 23, for example, the lid main body 31 is erected so that the flat surface 34H is vertical, and the pair of hinge projections 34 are received. It can be accommodated in the pair of introduction grooves 24 from the front and the lid 30 can be pulled upward. Then, the tip of each hinge projection 34 slides on the slope 24U of the dam 24S above the introduction groove 24, and the pair of lid-side connecting portions 32 and 33 are elastically deformed so that they are slightly separated from each other. Then, each hinge projection 34 climbs over the dam 24S, the pair of lid-side connecting portions 32 and 33 are elastically restored, and the pair of hinge projections 34 are received in the pair of hinge recesses 23. As shown in FIG. In this manner, the lid 30 can be easily attached to the top of the water meter 10 . Moreover, once assembled, the lid 30 cannot be removed from the upper portion of the water meter 10 unless the pair of lid-side connecting portions 32 and 33 are spread while the lid 30 is maintained in an upright posture.

When the lid 30 is rotated upward from the closed state, the lid main body 31 comes into contact with the upper surface 50A of the meter-side connecting portion 50 at a position rotated 180 degrees from the closed state, as shown in FIG. held open. Note that the lid body 30 may be held in the open position in any posture as long as the lid body 30 is held in the open state by gravity. However, in order to use the back surface of the lid 30 as a portion for printing information like the printing unit 21R described above, it is possible to rotate the cover 30 by 120 to 180 degrees from the closed state and hold the open position. preferable. Furthermore, in the above structure, the upper surface 50A of the meter-side connecting portion 50 abuts against the cover body 30 as an open-position stopper portion. It may be made to abut on the lid-side connecting portion 32 without any.

As shown in FIG. 5A, one lid-side connecting portion 32 is provided with a vertical through-hole 32K penetrating vertically. The vertical through-hole 32K has a square cross-section from the upper end in the vertical direction to the middle position, and is open to the upper surface and the front surface of the portion of the lid-side connecting portion 32 that protrudes upward from the lid main body portion 31. . Further, as shown in FIG. 5B, the vertical through-hole 32K has a trapezoidal cross section extending in the horizontal direction from the middle position in the vertical direction to the lower end. At the lower end opening of the upper and lower through holes 32K, a cantilever beam is formed from the center of the opening edge of the lid main body 31 side of a pair of parallel opening edges facing each other in the front-rear direction toward the opening edge on the opposite side. An elastic deformation portion 35 protrudes.

As shown in FIG. 5B, the lower surface of the elastically deforming portion 35 is flush with the lower surface of the entire lid-side connecting portion 32, and the lid-side engaging portion 35T extends from the lower surface of the elastically deforming portion 35. Protruding. The lid-side engaging portion 35T has a ridge structure extending in the lateral direction along the edge of the tip of the elastically deforming portion 35, and its cross-sectional shape is, for example, semicircular. Then, when the lid body 30 is closed, the lid-side locking portion 35T fits into the engagement groove 25M of the water meter 10, as shown in FIG. As a result, the meter-side locking portion 51 on the front side of the engagement groove 25M in the embankment portion 52 of the water meter 10 faces the lid-side locking portion 35T in the tangential direction of a circle centered on the rotation axis J1. , so that the lid body 30 is locked in the closed state.

When the lid body 30 is rotated upward from the closed state, the lid-side locking portion 35T slides into contact with the meter-side locking portion 51, and the elastic deformation portion 35 is elastically deformed. The engagement with portion 51 is released. Then, when the lid 30 is rotated from the closed state to open, the lid 30 comes into contact with the upper surface 50A of the meter-side connecting portion 50 when rotated 180 degrees, and is positioned at the open position. Further, when the lid body 30 is rotated in the closing direction, just before the lid body 30 is closed, the tip of the lid-side engaging portion 35T slides against the upper surface of the bank portion 52 on the front side of the engagement groove 25M and elastically contacts. When the deformable portion 35 is elastically deformed and the lid body 30 is closed, the lid-side locking portion 35T fits into the engagement groove 25M, and the lid body 30 is locked in the closed state as described above.

The description about the structure of the water meter 10 of this embodiment is above. Next, the effect of the water meter 10 is demonstrated. In the water meter 10 of the present embodiment, as shown in FIG. Since the engaging portion is located near the position directly below the rotating shaft J1 and the engaging portion is closer to the rotating shaft than in the conventional cover locking structure of the water meter, the locking force to lock the lid 30 in the closed state is obtained. variation is suppressed. Further, as shown in FIG. 8, even when the lid 30 is open, the meter-side locking portion 51 is hidden by the lid 30 and can be attached to the lid 30 on the upper surface 10G of the water meter 10 like a conventional locking piece. Since it does not protrude at a position apart from the contact piece, it does not come into contact with a foreign object and is damaged unlike the conventional locking piece, and durability is improved. Furthermore, since the conventional latching piece is abolished, the usable area on the upper surface 10G of the water meter 10 increases, so that the meter display portion 40 can be made wider than before, and the printing portion 21R can be provided on the upper surface 10G. can also

By the way, since the lid 30 has a flat shape in the vertical direction, the lid 30 is molded by a molding die that is opened vertically. In contrast, in the locking structure of the lid body 30 of the present embodiment, the lid-side locking portion 35T and the meter-side locking portion 51 face each other in the tangential direction of the circle centered on the rotation axis J1. Since the body 30 is locked in the closed state, the engaging surfaces of the lid-side locking portion 35T and the meter-side locking portion 51 can be made parallel to the vertical direction. In other words, the lid-side engaging portion 35T and the meter-side engaging portion 51 can be formed in a non-undercut shape, and can be manufactured at a lower cost than conventional products having undercut-shaped engaging pieces. In addition, since the elastically deformable portion 35 has a beam shape extending substantially horizontally and has the lid-side locking portion 35T on the lower surface, the elastically deformable portion 35 can also be formed in a non-undercut shape.

In addition, since the elastically deforming portion 35 is formed by separating a part of the lid 30 into a beam shape by the vertical through-hole 32K penetrating vertically through the lid 30, the elastically deforming portion 35 faces the upper and lower through-holes 32K. Protected by walls. Furthermore, since the lid body 30 is provided with a pair of hinge protrusions 34, it does not have an undercut shape as in the case where the lid-side connecting portions 32 and 33 are provided with pin holes, for example, and can be manufactured at a low cost. can do.

Further, the lid-side connecting portions 32, 33 and the meter-side connecting portion 50 protrude upward from the lid body portion 31 in the closed state, and have the rotation shaft J1 at their upper ends. The meter-side engaging portion 51 is separated from the rotation shaft J1, and as the lid body 30 rotates, the distance between the lid-side engaging portion 35T and the meter-side engaging portion 51 increases, and the lid-side engaging portion 35T and the meter-side engaging portion 51 pass each other. The portion 35T and the meter-side locking portion 51 can be smoothly engaged.

Further, when the lid body 30 is rotated 180 degrees from the closed state, the open state is maintained by contacting the upper surface of the meter-side connecting portion 50 corresponding to the open position stopper portion, so that the visibility of the meter display portion 40 is improved. It is secured and the operation to return to the closed state can be easily performed. Further, since the rear surface of the lid 30 can be easily visually recognized, the rear surface of the lid 30 can be used as a printing portion, a sticker pasting portion, or the like.

[Other embodiments]
(1) In the water meter 10 of the above-described embodiment, the lid-side engaging portion 35T is arranged at the longitudinal end of the elastic deformation portion 35. The lid-side engaging portion 35T may be arranged at the center in the longitudinal direction.

(2) In the water meter 10 of the above-described embodiment, the lid-side locking portion 35T is received in the engagement groove 25M of the bank portion 52. Only the front portion may be left as the meter-side locking portion 51, and the portion behind the engagement groove 25M may be removed. In other words, the meter-side locking portion 51 may have a step structure.

(3) An engagement groove is provided on the lower surface of the lid 30, and an elastically deformable portion is provided on the upper surface 10G of the water meter 10 so that the meter-side locking portion protrudes from the upper surface and is received in the engagement groove. You may do so.

(4) In addition, in the water meter 10 of the above-described embodiment, the elastic deformation portion 35, the lid-side engaging portion 35T, and the meter-side engaging portion 51 face the upper surface 10G of the water meter 10 and the lid 30 in the vertical direction. Although it has been arranged in a portion facing the center axis J1, it may be arranged in a position facing in the axial direction of the central axis J1. Specifically, for example, at least one of the opposing surfaces of the pair of lid-side connecting portions 32 and 33 and at least one side surface of the pair of side protrusions 22 are provided with an elastic deformation portion 35 and a lid-side locking portion. 35T and the meter-side locking portion 51 may be arranged.

(5) In the above embodiment, the hinge projection 34 is arranged on the lid 30 and the hinge recess 23 is arranged on the upper part of the water meter 10, but the arrangement may be reversed.

Although specific examples of the technology included in the claims are disclosed in the specification and drawings, the technology described in the claims is not limited to these specific examples. Various modifications and changes of the examples are included, and a part of specific examples is also included.

10 water meter 10G upper surface 20A display opening 21R printing part 23 hinge concave part 24 introduction groove 24T throttle part 30 lid body 31 lid body part 32, 33 lid side connecting part 32K vertical through hole 34 hinge protrusion 35 elastic deformation part 35T lid side engagement stop portion 40 meter display portion 50 meter side connecting portion 50A upper surface (open position stopper portion)
50B front surface 51 meter side locking part J1 rotation shaft

Claims (9)

A water meter lid locking structure for locking a lid that is hinged to the top of a water meter and pivots about a horizontal pivot shaft in a closed state covering a meter display on the top of the water meter. in
A tangent line of a circle centered on the rotation shaft formed at a position near the bottom of the rotation shaft in the closed state of the lid and at a position near the bottom of the rotation shaft on the upper surface of the water meter. a lid-side locking portion and a meter-side locking portion facing each other in the direction to lock the lid body in the closed state;
Elastic deformation that supports the lid-side locking portion or the meter-side locking portion and elastically deforms as the lid-side locking portion and the meter-side locking portion slide into contact when the lid is rotated. and a water meter cover locking structure. 2. The water meter cover engaging structure according to claim 1, wherein said elastically deformable portion is formed in said cover and has a beam shape extending substantially horizontally in said closed state, and has said cover-side engaging portion on a lower surface thereof. . 3. The water meter cover locking structure according to claim 2, wherein said elastically deformable portion is formed by separating a part of said cover in said beam shape by means of a vertical through hole penetrating vertically. a cap-shaped or plate-shaped lid main body provided in the lid and overlapping the upper surface of the water meter in the closed state;
a pair of lid-side connecting portions protruding laterally from the lid body portion and facing each other in the axial direction of the rotating shaft;
a meter-side connecting portion protruding from the upper surface of the water meter on the side of the lid body portion and arranged between the pair of lid-side connecting portions;
a pair of hinge protrusions protruding from the pair of lid-side connecting portions in a direction approaching each other and arranged on the rotation shaft;
a pair of hinge recesses formed on both side surfaces of the meter-side connecting portion to rotatably receive the pair of hinge protrusions;
4. The water meter lid member according to any one of claims 1 to 3, wherein the lid-side locking portion and the elastically deforming portion are disposed below one or both of the lid-side connecting portions. stop structure. 5. The cover locking structure for a water meter according to claim 4, wherein said meter-side connecting portion and said cover-side connecting portion protrude upward from said cover main body portion in said closed state and have said pivot shaft at their upper ends. . On both sides of the meter side connecting part,
a pair of introduction grooves bent in an L shape, one end of which is connected to the lower part of the pair of hinge recesses and the other end of which is open to the outer surface of the meter-side connecting portion;
a narrowed portion communicating between each of the introduction grooves and each of the hinge recesses and having an opening width smaller than the inner diameter of the hinge recess;
The pair of hinge protrusions has a structure having a flat cut surface on the outer peripheral surface of a cylinder, and when the lid main body is in an upright state, the cut surface is substantially parallel to the vertical direction and passes through the narrowed portion. 6. The water meter cover locking structure according to claim 4 or 5. The water supply according to any one of claims 1 to 6, wherein the meter-side connecting portion is provided with an open position stopper portion that abuts when the cover is rotated 120 to 180 degrees from the closed state. Meter cover locking structure. 8. The water meter according to any one of claims 1 to 7, wherein a printing portion for laser-marking identification information of the water meter is provided on a top surface of the water meter at a position covered by the closed lid. 2. The water meter cover locking structure according to 1. A water meter comprising the water meter cover locking structure according to any one of claims 1 to 8.

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