JP6009289B2 - Dry water meter - Google Patents

Description

  The present invention relates to a dry water meter having a structure in which a weighing chamber of a lower case in which an impeller is accommodated and an accommodating portion of an integrated flow rate display unit disposed above the lower case are separated by a pressure receiving plate. .

  The dry water meter is screwed onto the inner periphery of the peripheral wall portion of the upper projecting annular portion, and a pressure receiving plate that is fitted inside the peripheral wall portion of the upper projecting annular portion of the lower case through a sealing member while maintaining watertightness. A pressure receiving plate fixing ring for fixing the pressure receiving plate to the lower case, and an integrated flow rate for transmitting the rotation of the impeller housed in the lower case via a magnet coupling and displaying the integrated flow rate A display unit, wherein the measurement chamber of the lower case and the accommodating portion of the integrated flow rate display unit are separated by a pressure receiving plate, so that tap water flowing in the lower case does not enter the display portion of the integrated flow rate display unit. is there.

  As one of the water meters having the above-described configuration, the one described in Patent Document 1 is known, and an integrated flow rate display unit (integrated flow rate display unit) disposed above the upper protruding annular portion of the lower case (lower case 1). 75) is fixed to the lower case (lower case 1) by a fixing cover 86 via a cap 84 disposed so as to cover the entire outer case, and further, the fixing cover 86 is fixed. A cover fixing ring 108 is disposed outside the fixed cover 86 in order to prevent the lower case (lower case 1) from being detached from the upper peripheral wall 8 of the lower case.

  For this reason, in the water meter of patent document 1, in order to fix the case 76 of the integrated flow rate display unit (integrated flow rate display unit 75) to the lower case (lower case 1), the fixed cover 86 and the cover fixing ring 108 Since two members are required, the number of parts as a whole increases, and the structure for fixing the case 76 of the integrated flow rate display unit (integrated flow rate display unit 75) to the lower case (lower case 1) only becomes complicated. In addition, the outer diameter of the upper peripheral wall 8 of the lower case (lower case 1) is also increased, resulting in a “thick” feeling as a whole and a design without a “clean feeling”.

JP 2000-171272 A

  This invention makes it a subject to simplify each attachment structure of the integrated flow rate display unit with respect to a lower case, and the whole cover with respect to the said integrated flow rate display unit in a dry-type water meter.

In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a pressure receiving plate that is fitted inside the upper projecting annular portion of the lower case through a seal member while being kept watertight, and an inner periphery of the upper projecting annular portion. Screwed together, a pressure receiving plate fixing ring for fixing the pressure receiving plate to the lower case, and the rotation of the impeller housed in the lower case are transmitted via a magnet coupling to display an integrated flow rate. In a dry water meter equipped with an integrated flow rate display unit
Either one of the outer case of the integrated flow rate display unit or the pressure receiving plate fixing ring is formed with a plurality of elastically deformable locking claws, and the other is locked with the locking claws. A locked part is formed,
In a state where the integrated flow rate display unit is disposed on the pressure receiving plate fixing ring fixed to the lower case, the plurality of locking claws are locked to the locked portions, and the pressure receiving plate is fixed. The integrated flow rate display unit is integrally attached to the ring.

According to the first aspect of the present invention, the pressure receiving plate is fitted inside the upper projecting annular portion of the lower case while maintaining watertightness, and the pressure receiving plate is fixed to the lower case by the pressure receiving plate fixing ring. The integrated flow rate display unit is disposed above the pressure receiving plate, the integrated flow rate display unit is pressed downward, and the integrated flow rate display unit is disposed on the pressure receiving plate fixing ring fixed to the lower case. In this state, the plurality of locking claws formed on either the outer case or the pressure receiving plate fixing ring and the locked portions formed on the other side are locked, and the pressure receiving plate The integrated flow rate display unit can be attached to the fixed ring with a single touch. As a result, the integrated flow rate display unit is attached to the lower case.

  As described above, since the integrated flow rate display unit can be attached to the lower case by simply pressing the integrated flow rate display unit downward with respect to the lower case, it is easy to attach the integrated flow rate display unit to the lower case. At the same time, it is attached to the upper end of the rotating shaft portion of the impeller housed in the lower case by a plurality of locking claws provided in either the outer case of the integrated flow rate display unit or the pressure receiving plate fixing ring. Centering of the magnet provided on the side of the integrated flow rate display unit with respect to the magnet on the impeller side is also automatically performed with high accuracy.

According to a second aspect of the present invention, there is provided a pressure receiving plate that is fitted inside the upper projecting annular portion of the lower case through a sealing member while being watertight, and is screwed into the inner periphery of the upper projecting annular portion, A pressure receiving plate fixing ring for fixing the plate to the lower case, and an integrated flow rate display unit for transmitting the rotation of the impeller accommodated in the lower case via a magnet coupling and displaying the integrated flow rate In a dry water meter,
Either one of the outer case or the pressure receiving plate of the integrated flow rate display unit is formed with a plurality of elastically deformable locking claws, and the other side is engaged by the locking claws. A stop is formed,
In a state where the integrated flow rate display unit is arranged on the pressure receiving plate fixed to the lower case, the plurality of locking claws are locked to the locked portion, and the pressure receiving plate is The integrated flow rate display unit is configured to be integrally attached.

  The invention of claim 1 is configured such that the outer case of the integrated flow rate display unit is attached to the pressure receiving plate fixing ring that fixes the pressure receiving plate to the lower case. The only difference from the invention of claim 1 is that the outer case is attached to the pressure receiving plate fixed to the lower case, and the locking structure for attachment is the same. The operational effect of the invention of claim 2 is substantially the same as that of the invention of claim 1.

According to a third aspect of the present invention, there is provided a pressure receiving plate that is fitted inside the upper projecting annular portion of the lower case through a seal member, and is screwed into an inner periphery of the upper projecting annular portion. A pressure receiving plate fixing ring for fixing the plate to the lower case, an accumulated flow rate display unit for transmitting the rotation of the impeller accommodated in the lower case via a magnetic coupling, and displaying an accumulated flow rate; In a dry water meter provided with a cover body that can be opened and closed so as to be able to open and close the cover body covering the display unit of the integrated flow rate display unit, and an irregular short tubular overall cover that covers the entire integrated flow rate display unit,
A locking portion projects radially from one of the outer surface of the outer case of the integrated flow rate display unit and the inside of the cover body of the entire cover, and the other is locked to the locking portion. A locked portion is formed,
Wherein in a state in which the entire cover is overmolded on the outside of the outer casing of the integrated flow rate display unit, at least one is elastically deformed in the locking portion and the locked portion, by being engaged with each other, wherein The whole cover is attached to the outer case.

  According to the invention of claim 3, in a state where the integrated flow rate display unit is attached to the lower case, the entire flow rate display unit is covered with the entire cover so as to cover the entire integrated flow rate display unit with the entire cover. When the is pressed, the outer surface of the outer case of the integrated flow rate display unit, and a locking portion projecting radially on one of the inner sides of the cover body of the whole cover, and a locked portion provided on the other side The entire cover that covers the entire outer case of the integrated flow rate display unit by being locked is attached to the outer case in a non-removable state.

  As described above, the entire cover can be attached to the outer case simply by pressing the entire cover against the outer case of the integrated flow rate display unit. On the other hand, once the entire cover is attached, it is impossible to remove the entire cover, so that it is possible to prevent fraud that intentionally changes the display on the display unit of the integrated flow rate display unit.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the outer peripheral surface of the locked portion provided on the outer side of the outer case is formed into a tapered surface such that the diameter on the lower surface side is larger than the upper surface side. In addition, the inner end surface of the locking portion inside the cover body is formed in a tapered surface corresponding to the tapered surface of the outer peripheral surface of the locked portion.

  According to invention of Claim 4, while the outer peripheral surface of the to-be-latched part provided in the outer case is formed in the taper surface, of the latching | locking part inside the cover main body latched with the said to-be-latched part Because the inner end surface is also formed with a corresponding tapered surface, the entire cover is pushed into the outer case of the integrated flow rate display unit, and the locking part of the cover body is locked to the locked part of the outer case. The movement when moving in the axial direction of the impeller housed in the door is smooth, and the locking between the locked portion of the outer case and the locking portion of the cover body is the locked portion or locking It is performed smoothly without damaging or destroying the part.

  According to a fifth aspect of the present invention, in the third or fourth aspect of the invention, the integrated flow rate display is provided on one of the locked portion of the outer case of the integrated flow rate display unit and the inner peripheral surface of the cover body of the overall cover. A positioning recess for positioning the whole cover in the circumferential direction with respect to the unit is provided, and a positioning protrusion that is fitted to the positioning recess is provided on the other side.

  The entire cover that covers the integrated flow rate display unit integrated with the lower case needs to determine a circumferential position with respect to the integrated flow rate display unit in relation to the hinge portion of the lid. In the invention of claim 5, one of the locked portion of the outer case of the integrated flow rate display unit and the inner peripheral surface of the cover body of the overall cover is provided in the circumferential direction of the overall cover with respect to the integrated flow rate display unit. Positioning recesses for positioning are provided, and positioning protrusions fitted to the positioning recesses are provided on the other side, so that the circumferential position can be determined easily and reliably.

  According to the present invention, in the dry water meter, the outer case of the integrated flow rate display unit or the pressure receiving plate fixing ring has a plurality of elastically deformable locking claws, and the other side. The latching portion to which the latching claw portion is latched is formed, and the mounting structure of the integrated flow rate display unit with respect to the lower case is simplified by the latching structure of the latching claw portion and the latched portion. In addition, a locking portion protrudes in a radial direction on one of the outer surface of the outer case of the integrated flow rate display unit and the inner side of the cover body of the whole cover, and on the other side, the locking portion A locked portion to be locked is formed, and the mounting structure of the entire flow rate display unit is simplified by the locking structure of the locking portion and the locked portion.

It is an exploded perspective view of the dry water meter A ₁ of the first embodiment of the present invention. FIG. 5 is a perspective view of a state where an integrated flow rate display unit U is attached to a pressure receiving plate fixing ring R ₁ that fixes a pressure receiving plate P ₁ to the lower case B. 4 is a perspective view of a state in which the entire cover C is attached to the integrated flow rate display unit U fixedly disposed above the lower case B. FIG. 4 is a perspective view of a state in which an entire cover C is attached to an integrated flow rate display unit U fixedly disposed above the lower case B. FIG. It is sectional drawing similarly. FIG. 6 is a sectional view taken along line XX of FIG. 5. FIG. 6 is a cross-sectional view taken along line YY in FIG. 5. Than the pressure receiving plate P ₁ dry water meter A ₂ of the second embodiment of the present invention is a vertical sectional view of the upper portion. Than the pressure receiving plate P ₃ of dry water meter A ₃ Example 3 of the present invention is a vertical sectional view of the upper portion. Than the pressure receiving plate P ₄ dry water meter A ₄ Example 4 of the present invention is a vertical sectional view of the upper portion.

  Hereinafter, the present invention will be described in more detail with reference to a plurality of examples.

A dry water meter A _{1 according} to the first embodiment of the present invention is shown in FIGS. In the dry water meter A ₁ , the measurement chamber (not shown) of the lower case B and the display unit of the integrated flow rate display unit U disposed above the lower case B are annularly projecting upward from the lower case B. This is a structure separated from the inside of the portion 8 by a pressure receiving plate P ₁ fitted through an O-ring 18 which is a seal member. The feature of the present invention does not exist on the lower case B side, but is a structure for fixing the outer case K ₁ of the integrated flow rate display unit U to the pressure receiving plate P ₁ and the entire cover for the outer case K ₁ . Since it exists in the fixed structure of C, in FIG. 5, the lower case B side is made into a non-cross-sectional display, and the general description required as a water meter is performed only using a wording.

  As shown in FIGS. 1, 2 and 5, the lower case B constitutes a hollow short cylindrical inner case housing portion (not shown) having a ratio of height to diameter of approximately (1/2). A case main body 1 having a bottomed short cylindrical shape, and an inlet pipe 2 and an outlet pipe 3 which are integrally provided in the case main body 1 in a straight line shape in a plan view. The inner case housing portion accommodates an inner case 4 that is divided into upper and lower parts, and the inner case 4 includes upper and lower inner case parts (an upper inner case part 4a is shown in FIG. 1). ) Is assembled, the impeller 5 is accommodated in the internal measuring chamber. An inlet and an outlet for tap water are respectively formed on the peripheral surface of the inner case 4, and a rotary shaft portion that can project the rotary shaft portion 6 (see FIG. 1) of the impeller 5 to the outside is inserted on the upper surface thereof. An opening 7 (see FIG. 5) is formed. After the impeller 5 is rotated, the tap water that has flowed into the internal measurement chamber from the inlet of the inner case 4 flows out from the outlet.

  In FIG. 5, an upper protruding annular portion 8 having a larger diameter than that of the case body 1 and having an overall shape is integrally formed on the upper portion of the case body 1, and constitutes the inner case 4. The upper end portion of the inner case divided body 4 a reaches the lower end portion of the upward projecting annular portion 8. Two stepped portions 11 and 12 are formed on the inner peripheral surface of the annular upper projecting annular portion 8, and above the two stepped portions 11 and 12 on the inner peripheral surface of the upper projecting annular portion 8. The female screw part 13 is formed. An upper end portion of the rotating shaft portion 6 of the impeller 5 accommodated in the measuring chamber of the inner case 4 protrudes upward from a rotating shaft portion insertion opening 7 formed on the upper surface of the inner case 4.

The pressure receiving plate P ₁ isolates the measurement chamber of the lower case B in which the impeller 5 is housed from the integrated flow rate display unit U disposed above the lower case B, and also provides a high pressure of tap water in the measurement chamber. The whole is formed of resin, and the lower end portion of the upper projecting portion 14 in the central portion and the upper end portion of the annular wall portion 15 on the outer periphery are integrally connected by a thick connecting plate portion 16. The fixed flange portion 17 is integrally formed on the outer periphery of the lower end of the annular wall portion 15 toward the outside. The pressure receiving plate P ₁ inside the recess formed 14a of the upper protruding portion 14, the upper end portion of the rotary shaft portion 6 is accommodated.

An O-ring 18 as a seal member is disposed on the step 11 below the upper projecting annular portion 8 of the lower case B, and the fixing collar portion 17 of the pressure receiving plate P ₁ entirely accommodated in the upper projecting annular portion 8 is located upward. When the pressure receiving plate fixing ring R ₁ is screwed into the female screw portion 13 on the inner peripheral surface of the upward projecting annular portion 8, the fixing flange portion 17 of the pressure receiving plate P ₁ is inserted into the stepped portion 12. By being pressed and the O-ring 18 is compressed and deformed, the inside and outside of the case main body 1 are separated from each other while maintaining watertightness via the pressure receiving plate P ₁ (see FIG. 2).

The pressure receiving plate fixing ring R ₁ is also formed of resin, and as shown in FIGS. 1 and 5, a male screw 22 is formed on the outer peripheral surface of the ring body 21, and an elastic surface is formed on the upper end surface of the ring body 21. A plurality of deformable locking claws 23 are configured to protrude upward at equal intervals along the circumferential direction. As for the latching claw part 23, the latching claw 23a is integrally provided inside the upper end part.

As shown in FIGS. 1 to 5, the integrated flow rate display unit U has a configuration in which an integrated flow rate display unit 31 is accommodated in the outer case K ₁ . At the lower end portion of the peripheral wall portion 32 of the outer case K _1, a hook-shaped first locked portion 33 that is locked to the locking claw portion 23 of the pressure receiving plate fixing ring R ₁ is projected outward. A hook ring shape that is locked to a plurality of locking portions 43 that protrude from the inside of a cover main body 41 of the whole cover C, which will be described later, at a portion of the peripheral wall portion 32 above the first locked portion 33. The second locked portion 34 is configured to protrude outward. The second locked portion 34 is formed thinner than the first locked portion 33 so as to be slightly elastically deformable, and the entire cover C for the integrated flow rate display unit U is located at a specific position in the circumferential direction. In order to enable positioning in the circumferential direction, a positioning recess 35 is formed into which a positioning protrusion 44 formed on the inner side of the cover main body 41 of the entire cover C is fitted.

As shown in FIG. 2, the pressure receiving plate P ₁ accommodated in the upper protruding annular portion 8 of the lower case B is fixed to the upper protruding annular portion 8 via the pressure receiving plate fixing ring R ₁ . When pressing the accumulated flow display unit U from above with respect to the pressure receiving plate fixing ring R _1, the engaging claw 23a of the locking claw part 23 provided to the pressure receiving plate fixing ring R ₁ is of the outer case K ₁ 1 is elastically deformed slightly outward by the latched portion 33, and after passing through the first latched portion 33, each latching claw portion 23 is restored to its original shape, and the pressure receiving plate fixing ring R _{1 is} outer case K ₁ of the integrated flow rate display unit U is fixed. In this case, by, for example to confirm the position of the positioning recess 35 provided in the outer case K _1, know the circumferential direction of the position of the integrated flow rate display unit 31 with respect to the case body portion 1 of the lower case B.

As described above, since the integrated flow rate display unit U can be attached to the lower case B simply by pressing the integrated flow rate display unit U downward against the lower case B, the integrated flow rate display unit for the lower case B can be attached. The mounting operation of U is facilitated, and the U is attached to the upper end portion of the rotating shaft portion 6 of the impeller 5 accommodated in the lower case B by a plurality of locking claws 23 provided on the pressure receiving plate fixing ring R _1. The centering of the magnet M ₂ provided on the integrated flow rate display unit U side with respect to the magnet M ₁ on the impeller side is also automatically performed with high accuracy.

Next, as shown in FIG. 5, after fitting the O-ring 30 in the annular groove formed in the outer peripheral upper end portion of the peripheral wall portion 32 of the outer case K ₁ of the integrated flow rate display unit U, the outer case K ₁ by placing a disk-shaped transparent glass sheet G Wazukaniwan song opening by screwing the glass retaining ring 52 having a retainer flange 51 on the outside of the outer casing K _1, by the pressing flange 51 When the thin pressed portion 61 at the periphery of the transparent glass plate G is pressed, the opening of the outer case K ₁ of the integrated flow rate display unit U is covered with the transparent glass plate G.

The cover C is attached to the opening of the irregular short cylindrical cover main body 41 via a hinge 45 so that the entire cover C can be rotated, and the integrated flow rate display unit 31 of the integrated flow rate display unit U is covered by the lid 42. It is the structure which covers. The second locked portion 34 of the outer case K ₁ of the integrated flow rate display unit U locks a plurality of locking portions 43 provided on the inner side of the cover main body 41, so that the integrated flow rate display unit U is protected. It is a member for fixing the entire cover C, and the outer peripheral surface 34a of the second locked portion 34 is formed in a tapered surface such that the diameter on the lower surface side is larger than that on the upper surface side. The inner end surface 43a is formed in a tapered surface corresponding to the tapered surface of the outer peripheral surface 34a of the second locked portion 34.

Then, while aligning the positioning convex portion 44 of the entire cover C with respect to the positioning recess 35 of the outer case K _1, it is pressed against the entire cover C with respect to the outer casing K _1, a second object of the outer case K ₁ When the latching portion 34 is slightly elastically deformed and the latching portion 43 of the entire cover C passes through the portion of the second latched portion 34, the latching portion 34 is moved relative to the second latched portion 34 of the outer case K ₁ . The locking portion 43 of the entire cover C is locked, and the entire cover C is covered with respect to the entire integrated flow rate display unit U. Here, since the outer peripheral surface 34a of the second locked portion 34 and the inner end surface 43a of the locking portion 43 of the entire cover C are formed in corresponding tapered surfaces, the entire cover C is attached to the case main body 1. The movement when moving in the axial direction of the impeller 5 accommodated becomes smooth, and the second locked portion 34 of the outer case K ₁ and the locking portion 43 of the cover body 41 are locked. This is performed smoothly without damaging or destroying the second locked portion 34 or the locking portion 43. Further, once the second locked portion 34 of the outer case K ₁ and the locking portion 43 of the cover main body 41 are once locked, the entire cover C cannot be easily removed. It is possible to prevent fraud that intentionally changes the display on the display unit of the flow rate display unit. Further, the cylindrical portion of the lower end portion of the cover body 41 of the entire cover C is in contact with the annular convex portion 8 a outside the upward projecting annular portion 8, and the lower end of the cover body 41 is located outside the upward projecting annular portion 8. Since only the cylindrical part of the part exists, the structure of the part is simplified, and the entire design is refreshed.

The magnet M ₁ embedded in the upper end portion of the rotating shaft 6 of the impeller 5 that has entered the upper protruding portion 14 of the pressure receiving plate P ₁ and the integrated flow rate display unit 31 of the integrated flow rate display unit U are configured. The magnet M ₂ attached to the lower end of the input shaft 71 is adjacent to the magnet plate ₂ through the thin wall portion of the pressure receiving plate P ₁ to form a magnet joint, and the rotating shaft portion 6 of the impeller 5 The rotation is transmitted to the input shaft 71 of the integrated flow rate display unit 31 as it is.

Engaging in Example 1 described above, the outside of the outer casing K ₁ of the peripheral wall 32 provided with a plurality of locking portions, on the inner peripheral surface of the cover body 41 of the entire cover C, to the plurality of engaging portions It is also possible to provide an annular locked portion to be stopped. Further, regarding the positioning structure along the circumferential direction of the entire cover C with respect to the integrated flow rate display unit U, a positioning convex portion is provided in the outer case K ₁ of the integrated flow rate display unit U, and the cover main body 41 of the entire cover C is subjected to the positioning. It is also possible to provide a positioning recess to be fitted to the protrusion.

FIG. 8 is a longitudinal sectional view of a portion above the pressure receiving plate P ₁ of the dry water meter A ₂ of the _second embodiment, and the same reference numerals are used for the same parts as the dry water meter A _{1 of the} first embodiment. Only the different parts will be described while avoiding repeated explanation. The dry water meter A ₂ is different from the dry water meter A ₁ only in the fixing structure of the outer case K ₂ of the integrated flow rate display unit U with respect to the pressure receiving plate fixing ring R ₂ . That is, a flange portion 33 ′ is formed at the outer peripheral lower end portion of the peripheral wall portion 32 of the outer case K ₂ , and is a lower surface of the flange portion 33 ′. 36 is formed downward. On the other hand, a substantially upper half portion of the ring-shaped pressure receiving plate fixing ring R ₂ , and the inner peripheral side portion thereof is annularly removed to form a locking claw insertion recess 24. the inner peripheral wall surface 24a of the part insertion recess 24, engaging portion 25 of the locking pawl 36 of the outer casing K ₂ is locked is formed in an stepped concave.

Therefore, in a state where the pressure receiving plate P ₁ is fixed to the upwardly projecting annular portion 8 of the lower case B by the pressure receiving plate fixing ring R _2, it is pressed against the integrated flow rate display unit U with respect to the pressure receiving plate P _1, the outer case K _{The second} locking claw portion 36 is inserted into the locking claw portion insertion recess 24 of the pressure receiving plate fixing ring R ₂ , and the locking claw at the tip is locked to the locked portion 25 of the pressure receiving plate fixing ring R _2. are, integrated flow display unit U is attached to the pressure receiving plate fixing ring R _2.

In the first and second embodiments described above, the outer cases K ₁ and K _{2 of the} integrated flow rate display unit U are attached to the pressure receiving plate fixing rings R ₁ and R ₂ . The _third and _fourth embodiments are different from the first and second embodiments in that the outer cases K ₃ and K _{4 of the} integrated flow rate display unit U are attached to the pressure receiving plates P ₃ and P ₄ . .

Figure 9 is a longitudinal sectional view of the upper portion than the pressure receiving plate P ₃ of dry water meter A ₃ of Example 3. In the dry-type water meter A _{3 according to the} third embodiment, a plurality of locking claw portions 19 that can be elastically deformed are provided on the outer peripheral portion of the upper end surface of the annular wall portion 15 of the pressure receiving plate P ₃ so as to be integrated. On the outer peripheral side of the lower end portion of the peripheral wall portion 32 of the outer case K ₃ of the display unit U, an annular locked portion 37 formed in a stepped concave shape is formed, and the integrated flow rate display unit U with respect to the pressure receiving plate P ₃ is formed. When pressing the, after each engagement claw portion 19 is elastically deformed slightly outward, and restored to the original shape, and the engaging claw 19a of the locking claw part 19 of the pressure receiving plate P _3, the outer case K _{The three} annular locked portions 37 are locked, and the outer case K ₃ of the integrated flow rate display unit U is attached to the pressure receiving plate P ₃ .

Figure 10 is a longitudinal sectional view of the upper portion than the pressure receiving plate P ₄ dry water meter A ₄ Example 4. On the outer periphery of the bottom surface of the bottom plate portion 38 of the outer case K ₄ of the integrated flow rate display unit U, a plurality of elastically deformable locking claws 39 are provided facing downward, and the annular wall portion 15 of the pressure receiving plate P _4. the inner peripheral side of the upper portion, the latched portion 10 each engaging claw part 39 has a lockable concave annular is formed, and the engaging claw portion 39 of the outer case K _4, the pressure receiving plate The outer case K ₄ of the integrated flow rate display unit U is attached to the pressure receiving plate P ₄ by locking the P _{4 with} the locked portion 10.

A _{1 to} A ₄ : Dry water meter
B: Lower case
C: Whole cover K ₁ , K ₂ , K ₃ , K ₄ : Outer case of integrated flow rate display unit
M ₁ and M ₂ : Magnets (magnet couplings)
P ₁ , P ₃ , P ₄ : Pressure receiving plate
R ₁ , R ₂ , R ₄ : pressure plate fixing ring
U: Integrated flow rate display unit
8: Upward projecting annular portions 10, 25, 33, 37: Locked portions 19, 23, 36, 39: Locking claw portions
34: Locked portion for locking with the locking portion of the cover body provided in the outer case
34a: taper outer peripheral surface
35: Positioning recess
41: Cover body
43: Locking portion provided on the cover body
43a: Tapered inner end face
44: Positioning convex portion

Claims (5)

A pressure receiving plate that is fitted inside the upper projecting annular portion of the lower case through a seal member while being watertight, and is screwed to the inner periphery of the upper projecting annular portion, and the pressure receiving plate is attached to the lower case In a dry water meter provided with an integrated flow rate display unit for transmitting the rotation of the impeller accommodated in the lower case and the rotation of the impeller housed in the lower case via a magnetic coupling, and displaying the integrated flow rate,
Either one of the outer case of the integrated flow rate display unit or the pressure receiving plate fixing ring is formed with a plurality of elastically deformable locking claws, and the other is locked with the locking claws. A locked part is formed,
In a state where the integrated flow rate display unit is disposed on the pressure receiving plate fixing ring fixed to the lower case, the plurality of locking claws are locked to the locked portions, and the pressure receiving plate is fixed. A dry water meter, wherein the integrated flow rate display unit is integrally attached to a ring. A pressure receiving plate that is fitted inside the upper projecting annular portion of the lower case through a seal member while being watertight, and is screwed to the inner periphery of the upper projecting annular portion, and the pressure receiving plate is attached to the lower case In a dry water meter provided with an integrated flow rate display unit for transmitting the rotation of the impeller accommodated in the lower case and the rotation of the impeller housed in the lower case via a magnetic coupling, and displaying the integrated flow rate,
Either one of the outer case or the pressure receiving plate of the integrated flow rate display unit is formed with a plurality of elastically deformable locking claws, and the other side is engaged by the locking claws. A stop is formed,
In a state where the integrated flow rate display unit is arranged on the pressure receiving plate fixed to the lower case, the plurality of locking claws are locked to the locked portion, and the pressure receiving plate is A dry-type water meter, wherein the integrated flow rate display unit is integrally attached. A pressure receiving plate that is fitted inside the upper projecting annular portion of the lower case through a seal member while being watertight, and is screwed to the inner periphery of the upper projecting annular portion, and the pressure receiving plate is attached to the lower case A pressure-receiving plate fixing ring for fixing the blade, a rotation of the impeller housed in the lower case, transmitted through a magnet coupling, and an integrated flow rate display unit for displaying the integrated flow rate, and the integrated flow rate display on the cover body In a dry water meter provided with a cover that covers the display unit of the unit so that it can be opened and closed, and an overall cover of an irregular short tube shape that covers the entire integrated flow rate display unit,
A locking portion projects radially from one of the outer surface of the outer case of the integrated flow rate display unit and the inside of the cover body of the entire cover, and the other is locked to the locking portion. A locked portion is formed,
Wherein in a state in which the entire cover is overmolded on the outside of the outer casing of the integrated flow rate display unit, at least one is elastically deformed in the locking portion and the locked portion, by being engaged with each other, wherein A dry water meter, characterized in that the entire cover is attached to an outer case.   The outer peripheral surface of the locked portion provided on the outer side of the outer case is formed in a tapered surface having a diameter on the lower surface side larger than that on the upper surface side. The dry water meter according to claim 3, wherein the inner end surface is formed on a tapered surface corresponding to a tapered surface of the outer peripheral surface of the locked portion.   A positioning recess for positioning the entire cover in the circumferential direction with respect to the integrated flow rate display unit on one of the locked portion of the outer case of the integrated flow rate display unit and the inner peripheral surface of the cover body of the entire cover The dry water meter according to claim 3 or 4, wherein a positioning convex portion fitted to the positioning concave portion is provided on the other side.

Images