JP6218769B2 - Water meter, assembling method and disassembling method thereof - Google Patents

Description

  The present invention relates to a water meter that measures the flow rate of water supply.

  Conventionally, a so-called “dry” water meter has been developed in which a pressure receiving plate is provided between the flowing water portion and the display unit to prevent water from entering the display unit from the flowing water portion. An impeller is arranged in the flowing water part, and rotates according to the water flow in the flowing water part. The rotation of the impeller is transmitted to the display unit by, for example, a magnet coupling, and the number of the counter accommodated in the display unit changes according to the number of rotations.

  In general, the flowing water portion of the dry water meter and the display unit are configured as separate members. When assembling the dry water meter, the pressure receiving plate is fixed to the flowing water using the pressure receiving plate fixing ring, and the display unit is attached to the pressure receiving plate fixing ring. Patent Document 1 discloses a mounting structure for attaching a display unit to a pressure receiving plate fixing ring of a dry water meter.

  In the dry-type water meter of Patent Document 1, a plurality of locking claw portions that can be elastically deformed are formed on a pressure receiving plate fixing ring that is fixed to a flowing water portion (lower case), and an outer case of a display unit (integrated flow rate display unit). A locked portion is formed. By pressing the integrated flow rate display unit against the pressure receiving plate fixing ring fixed to the lower case, the plurality of locking claws are locked to the locked portion, and the integrated flow rate display unit is pressed against the pressure receiving plate fixing ring. Is a structure that can be attached integrally.

JP 2014-55828 A

  When the water meter is manufactured, the flowing water part and the display unit may be assembled together and then disassembled and reassembled for readjustment. In addition, when the water meter is inspected, the flowing water part and the display unit may be disassembled and reassembled in some cases.

  In the dry-type water meter of Patent Document 1, when disassembling the flowing water part and the display unit, in the process of removing the locking claw part from the locked part, an operator pays attention to deterioration and breakage of the claw of the locking claw part. Cost. That is, since the dry water meter of Patent Document 1 is difficult to disassemble once assembled, the time required for disassembly increases, and there is a problem that it takes time to manufacture and inspect the water meter.

  The present invention has been made to solve the above-described problems, and a water meter capable of easily assembling a flowing water portion and a display unit together and easily disassembling, and an assembling method thereof, An object is to provide a decomposition method.

  The water meter of the present invention includes a pressure receiving plate fixing ring for fixing the pressure receiving plate to the opening of the flowing water portion, a display unit disposed inside the pressure receiving plate fixing ring, and a slit provided in a side peripheral portion of the pressure receiving plate fixing ring. And a fixing plate that is inserted into a first groove provided in a side peripheral portion of the display unit.

  The method for assembling a water meter according to the present invention includes a first step of disposing a display unit inside a pressure receiving plate fixing ring, and a second step of inserting the fixing plate through the slit into the first groove portion. Is.

  The water meter disassembling method according to the present invention includes a first step of removing the fixing plate from the first groove and the slit, and a second step of removing the display unit from the pressure receiving plate fixing ring.

  In the water meter according to the present invention, the flowing water part and the display unit can be easily assembled together and easily disassembled by the structure in which the display unit is fixed to the pressure receiving plate fixing ring using the fixing plate.

It is a disassembled perspective view which shows the principal part of the water meter which concerns on Embodiment 1 of this invention. It is a disassembled sectional view which shows the principal part of the water meter which concerns on Embodiment 1 of this invention. It is a perspective view which shows the pressure receiving plate fixing ring, display unit, fixing plate, and cover which concern on Embodiment 1 of this invention. It is sectional drawing to which the area | region containing the fixing plate and cover latching claw part concerning Embodiment 1 of this invention was expanded. It is the top view to which the area | region containing the fixing plate and cover latching claw part concerning Embodiment 1 of this invention was expanded. It is explanatory drawing which shows the assembly method of the principal part of the water meter which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the assembly method of the principal part of the water meter which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the disassembly method of the principal part of the water meter which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the disassembly method of the principal part of the water meter which concerns on Embodiment 1 of this invention. It is a perspective view which shows the principal part of the water meter which concerns on Embodiment 2 of this invention. It is an enlarged view of the area | region containing the latching claw part and to-be-latched part of the retaining ring which concern on Embodiment 2 of this invention. It is an enlarged view of the area | region containing the retaining ring and fixing plate which concern on Embodiment 2 of this invention. It is a disassembled perspective view of the principal part of the water meter which concerns on Embodiment 2 of this invention.

Embodiment 1 FIG.
FIG. 1 is an exploded perspective view of a main part of the water meter 100, and FIG. 2 is a sectional view thereof. FIG. 3 is a perspective view of the pressure plate fixing ring 3, the display unit 4, the fixing plate 5 and the cover 6. 4 is a cross-sectional view of a region including the fixing plate 5 and the cover locking claw portion 61, and FIG. 5 is a plan view thereof. With reference to FIGS. 1-5, the water meter 100 of Embodiment 1 of this invention is demonstrated.

  In the figure, 1 is a running water part. The flowing water part 1 has a hollow main body part 11, and an inflow pipe 12 and an outflow pipe 13 extending from the main body part 11. The hollow portion of the main body portion 11 communicates with the inflow pipe 12 and the outflow pipe 13 so that tap water flows inside. Further, an impeller (not shown) is disposed in the main body 11 and rotates according to the water flow in the flowing water portion 1.

  A substantially circular opening 14 is formed in the main body 11. The opening 14 is closed by a substantially disc-shaped pressure receiving plate 2, and the pressure receiving plate 2 is fixed to the opening 14 by a pressure receiving plate fixing ring 3. That is, a male screw portion 31 is formed on the outer peripheral portion of the pressure receiving plate fixing ring 3, and is screwed with a female screw portion 15 provided on the inner peripheral portion of the opening portion 14.

  A display unit 4 is arranged inside the pressure receiving plate fixing ring 3. Specifically, the display unit 4 includes a bottomed cylindrical case 41, and the bottom portion of the case 41 is inserted into the pressure receiving plate fixing ring 3. The display unit 4 houses a counter 42 and the like in a case 41 and covers the opening of the case 41 with a lid 43. The lid part 43 has a window part 44 made of a transparent member so that the numbers of the counter 42 can be visually recognized from the outside.

  The number indicated by the counter 42 changes in accordance with the rotational speed of the impeller disposed in the main body 11 of the flowing water part 1. At this time, the main body portion 11 is watertight by the pressure receiving plate 2 so that water does not enter the display unit 4 from the flowing water portion 1.

  Here, the pressure receiving plate fixing ring 3 has a ring-shaped protrusion 32 protruding from the opening 14. A second groove 33 is provided over the entire outer periphery of the protrusion 32, and two slits 34 are formed in the bottom of the second groove 33. A first groove 45 is provided over the entire outer periphery of the case 41. The slit 34 communicates with the first groove portion 45, and the fixing plate 5 passes through the slit 34 and is inserted into the first groove portion 45. The display unit 4 is supported by the fixing plate 5 so as to be rotatable about the axis A while being fixed to the pressure receiving plate fixing ring 3 in the direction along the axis A shown in FIGS. .

  As shown in FIG. 5, the fixing plate 5 has a shape formed by cutting out a part of an arc corresponding to the curvature of the side peripheral portion of the pressure receiving plate fixing ring 3. Furthermore, the end portions 51 a and 51 b of the fixed plate 5 are formed in a tapered shape, and the end portions 51 a and 51 b face the bottom portion 46 of the first groove portion 45. As a result, gaps 52 a and 52 b are formed between the end portions 51 a and 51 b and the bottom portion 46. 1 to 5 show examples in which one fixing plate 5 is passed through each of the two slits 34.

  At least the side periphery of the display unit 4 is covered with a cover 6. The cover 6 is provided with a cover locking claw portion 61 having flexibility, and the cover locking claw portion 61 is locked to the second groove portion 33 of the pressure receiving plate fixing ring 3.

  Here, the arrangement of the cover locking claw portions 61 along the circumferential direction of the cover 6 corresponds to the arrangement of the slits 34 along the circumferential direction of the pressure receiving plate fixing ring 3. As a result, as shown in FIGS. 4 and 5, the tip end portion of the cover locking claw portion 61 locked to the second groove portion 33 comes into contact with the fixing plate 5 in the slit 34 to prevent the fixing plate 5 from falling off. Serves as a stopper. Further, the cover locking claw portion 61 is disposed so that the tip end portion of any one of the cover locking claw portions 61 contacts the fixing plate 5 even when the cover 6 rotates with respect to the pressure receiving plate fixing ring 3. .

Next, with reference to FIG.6 and FIG.7, the assembly method of the principal part of the water meter 100 comprised in this way is demonstrated.
First, the opening 14 of the flowing water portion 1 is closed by the pressure receiving plate 2 and fixed by the pressure receiving plate fixing ring 3.

  Next, as indicated by an arrow B in FIG. 6, the display unit 4 is disposed inside the pressure receiving plate fixing ring 3 (first step). Next, as indicated by an arrow C in FIG. 6, the fixing plate 5 is inserted into the first groove 45 through the slit 34 (second step). As a result, the display unit 4 is supported by the pressure receiving plate fixing ring 3 so as to be rotatable around the axis A as indicated by an arrow D in FIG.

  Next, as shown by an arrow E in FIG. At this time, the cover locking claw portion 61 is bent and locked to the second groove portion 33 of the pressure receiving plate fixing ring 3, and the cover 6 is fixed to the pressure receiving plate fixing ring 3. Further, the tip end portion of the cover locking claw portion 61 comes into contact with the fixed plate 5 in the slit 34 and functions as a stopper for preventing the fixed plate 5 from falling off.

Next, with reference to FIG.8 and FIG.9, the decomposition | disassembly method of the principal part of the water meter 100 is demonstrated.
First, the cover 6 is removed from the pressure receiving plate fixing ring 3. At this time, the cover locking claw portion 61 is bent and the locking with the second groove portion 33 is released.

  Next, as indicated by an arrow F in FIG. 8, the fixing plate 5 is extracted from the first groove 45 and the slit 34 (first step). At this time, since gaps 52a and 52b exist between the end portions 51a and 51b of the fixed plate 5 and the bottom portion 46 of the first groove portion 45, one end portion 51a is connected as shown by an arrow G in FIG. When pushed in toward the display unit 4, the fixed plate 5 rotates and the other end 51 b comes out of the slit 34 as shown by an arrow H in FIG. With the end portion 51 b protruding from the slit 34, the fixing plate 5 can be easily extracted.

  By pulling out the fixing plate 5, the display unit 4 can be attached to and detached from the pressure receiving plate fixing ring 3 as indicated by an arrow I in FIG. 8. Next, the display unit 4 is removed from the pressure receiving plate fixing ring 3 (second step).

As described above, the water meter 100 of the first embodiment includes the pressure receiving plate fixing ring 3 that fixes the pressure receiving plate 2 in the opening 14 of the flowing water portion 1, and the display unit 4 that is disposed inside the pressure receiving plate fixing ring 3. The fixing plate 5 penetrates the slit 34 provided in the side peripheral portion of the pressure receiving plate fixing ring 3 and is inserted into the first groove portion 45 provided in the side peripheral portion of the display unit 4.
With the structure in which the display unit 4 is fixed to the pressure receiving plate fixing ring 3 using the fixing plate 5, the flowing water part 1 and the display unit 4 can be easily assembled together and can be easily disassembled. In particular, since the time required for disassembly is shorter than that of the dry water meter disclosed in Patent Document 1, the process time for manufacturing and inspecting the water meter 100 can be shortened, and the product unit price can be reduced. Furthermore, compared with the dry-type water meter of patent document 1, it is hard to produce a damage of components at the time of decomposition | disassembly, and the quality of the product after installation can be stabilized.

  The end portions 51 a and 51 b of the fixed plate 5 are tapered, and gaps 52 a and 52 b are formed between the end portions 51 a and 51 b and the bottom portion 46 of the first groove portion 45. Thereby, in the process of disassembling the flowing water part 1 and the display unit 4, when one end 51 a is pushed toward the display unit 4, the fixing plate 5 rotates and the other end 51 b comes out of the slit 34. Become. By pulling out the fixing plate 5 with the end portion 51 b protruding from the slit 34, the flowing water portion 1 and the display unit 4 can be more easily disassembled.

  Further, the water meter 100 includes a cover 6 that covers the side periphery of the display unit 4. The slit 34 is provided at the bottom of the second groove 33 provided in the side periphery of the pressure receiving plate fixing ring 3. A cover locking claw portion 61 provided on the cover 6 is locked to the second groove portion 33, and a tip end portion of the cover locking claw portion 61 is in contact with the fixed plate 5. Since the cover latching claw portion 61 functions as a stopper, the fixing plate 5 can be prevented from falling off.

  In addition, the shape of the flowing water part 1 is not limited to the shape shown in FIGS. 1-5, and the internal structure of the display unit 4 is not limited to the structure shown in FIGS. As long as it constitutes a general dry-type water meter, the flowing water portion 1 of any shape may be used, and the display unit 4 having any internal structure may be used.

  The display unit 4 may be a so-called “electronic” water meter that accommodates a microcomputer instead of the counter 42 and displays the flow rate of water supply in a liquid crystal display.

  Further, the number of slits 34 is not limited to two. Any structure provided with at least one slit 34 may be used, and three or more slits 34 may be provided. Further, the number of the fixed plates 5 is not limited to two, and any number of fixed plates 5 may be used according to the number and size of the slits 34.

  Moreover, the shape of the fixed plate 5 is not limited to the shape shown in FIGS. As long as a gap is formed between at least one end and the bottom 46 of the first groove 45 and the other end comes out of the slit 34 by pushing one end when disassembling the water meter 100, Any shape is possible.

Embodiment 2. FIG.
FIG. 10 is a perspective view of the main part of the water meter 101. 11 is an enlarged view of a region including the locking claw portion 71a and the locked portion 72b of the retaining ring 7, and FIG. 12 is an enlarged view of a region including the retaining ring 7 and the fixing plate 5. FIG. 13 is an exploded perspective view of the main part of the water meter 101.
With reference to FIGS. 10-13, the water meter 101 which comprised the stationary plate 5 with the rib in the retaining ring 7 is demonstrated. 10-13, the same code | symbol is attached | subjected to the structural member similar to the water meter 100 of Embodiment 1 shown in FIGS. 1-5, and description is abbreviate | omitted.

  A retaining ring 7 is provided on the outer periphery of the protrusion 32 of the pressure receiving plate fixing ring 3. The retaining ring 7 has a semicircular arc-shaped first member 7a having a locking claw 71a at one end and a locked portion 72a at the other end, and a locking claw 71b at one end. The second member 7b having a semicircular arc shape having a locked portion 72b at the other end is combined.

  Six slits 34 are formed in the side periphery of the protrusion 32. Three ribs are respectively provided on the inner peripheral portions of the first member 7a and the second member 7b, and the fixing plate 5 is constituted by these ribs.

Next, a method for assembling the main part of the water meter 101 configured as described above will be described.
First, as indicated by an arrow J in FIG. 13, the display unit 4 is disposed inside the pressure receiving plate fixing ring 3.

  Next, as indicated by an arrow K in FIG. 13, the first member 7 a and the second member 7 b are arranged on the outer peripheral portion of the pressure receiving plate fixing ring 3 so that the fixing plate 5 enters the slit 34. Next, as shown in FIG. 11, the locking claw portion 71a of the first member 7a is locked to the locked portion 72b of the second member 7b, and similarly, the locking claw portion 71b of the second member 7b is locked to the first member 7a. It is locked to the locked portion 72a.

  By retaining the first member 7a and the second member 7b, the retaining ring 7 is fixed to the pressure receiving plate fixing ring 3 as shown in FIG. In addition, as shown in FIG. 12, the fixing plate 5 passes through the slit 34 of the pressure receiving plate fixing ring 3 and is inserted into the first groove 45 of the display unit 4, and the display unit 4 is attached to the pressure receiving plate fixing ring 3. On the other hand, it is rotatable in the circumferential direction while being fixed in the axial direction.

Next, a method for disassembling the main part of the water meter 101 will be described.
First, the first member 7 a and the second member 7 b are unlocked, and the retaining ring 7 is removed from the pressure receiving plate fixing ring 3. As a result, the fixing plate 5 is extracted from the first groove 45 and the slit 34, and the display unit 4 can be attached to and detached from the pressure receiving plate fixing ring 3 as indicated by an arrow L in FIG. 13. Next, the display unit 4 is detached from the pressure receiving plate fixing ring 3.

  As described above, the water meter 101 according to the second embodiment includes the retaining ring 7 provided on the outer peripheral portion of the pressure receiving plate fixing ring 3. The fixed plate 5 is configured by a rib protruding from the inner peripheral portion of the retaining ring 7. As in the first embodiment, by fixing the display unit 4 to the pressure receiving plate fixing ring 3 using the fixing plate 5, the flowing water part 1 and the display unit 4 can be easily assembled together and easily disassembled. be able to.

  In the present invention, within the scope of the invention, any combination of the embodiments, or any modification of any component in each embodiment, or omission of any component in each embodiment is possible. .

DESCRIPTION OF SYMBOLS 1 Flowing part 2 Pressure receiving plate 3 Pressure receiving plate fixing ring 4 Display unit 5 Fixing plate 6 Cover 7 Retaining ring 7a 1st member 7b 2nd member 11 Main body part 12 Inflow pipe 13 Outflow pipe 14 Opening part 15 Female screw part 31 Male screw part 32 ridge 33 second groove 34 slit 41 case 42 counter 43 lid 44 window 45 first groove 46 bottom 51a, 51b end 52a, 52b gap 61 cover locking claw 71a, 71b locking claw 72a, 72b Locked part 100, 101 Water meter

Claims (8)

A pressure receiving plate fixing ring for fixing the pressure receiving plate to the opening of the flowing water portion;
A display unit disposed inside the pressure plate fixing ring;
A fixing plate that penetrates a slit provided in a side peripheral portion of the pressure-receiving plate fixing ring and is inserted into a first groove portion provided in a side peripheral portion of the display unit;
A water meter equipped with.   2. The water meter according to claim 1, wherein an end portion of the fixing plate is tapered, and a gap is formed between the end portion and a bottom portion of the first groove portion. A cover that covers a side periphery of the display unit;
The slit is provided at the bottom of the second groove provided in the side periphery of the pressure receiving plate fixing ring,
The cover locking claw provided on the cover is locked in the second groove, and the tip of the cover locking claw is in contact with the fixed plate. 2. The water meter according to 2. A retaining ring provided on the outer periphery of the pressure plate fixing ring,
The water meter according to claim 1, wherein the fixing plate is configured by a rib provided on an inner peripheral portion of the retaining ring.   5. The water meter according to claim 4, wherein the retaining ring is formed by combining two semicircular arc members having a locking claw at one end and a locked portion at the other end. A method for assembling a water meter according to claim 1,
A first step of disposing the display unit inside the pressure plate fixing ring;
A second step of inserting the fixing plate into the first groove through the slit;
A method for assembling a water meter. A method for disassembling a water meter according to claim 1,
A first step of extracting the fixing plate from the first groove and the slit;
A second step of removing the display unit from the pressure plate fixing ring;
A method for disassembling a water meter, comprising: A method for disassembling a water meter according to claim 2,
A first step of extracting the fixing plate from the first groove and the slit;
A second step of removing the display unit from the pressure-receiving plate fixing ring,
Disassembling the water meter, wherein in the first step, the one end of the fixed plate is pushed in and the other end protrudes from the slit, and then the fixed plate is removed. Method.

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