JP3465142B2 - Case unit with weighing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a case unit having a measuring device such as a water meter.

[0002]

2. Description of the Related Art A typical example of a case unit equipped with a measuring instrument is a water meter which is widely put into practical use for general household use. A typical example of a water meter is a lower meter case having a circular bottom wall and a cylindrical side wall extending upward from the peripheral edge of the bottom wall, and an annular step formed on the outer periphery of the upper end is a side wall of the lower meter case. And a ring-shaped upper meter case removably mounted on the outer peripheral surface of the upper end of the side wall of the lower meter case. There is. A pair of conduit portions extending outward in the radial direction are integrally formed at the lower end of the side wall of the metal lower meter case. Each of the conduit portions is arranged at a position slightly deviated to the region on one side divided by a straight line passing through the axis when the lower meter case is viewed in the axial direction, and the respective through holes extend from the outer side toward the inner side in the radial direction. Further, it is formed so as to extend to the inner peripheral surface side of the side wall in the region on one side with a slight inclination. A support shaft is fixed to an axial center portion of the bottom wall of the lower meter case so as to extend upward from the upper surface thereof, and an impeller is rotatably supported on the support shaft. A pillar extending upward is formed at the axial center of the impeller, and an output gear is arranged at the upper end of the pillar. A large diameter portion is formed radially inward at the upper end portion of the side wall of the lower meter case, and an annular step portion is formed between the large diameter portion and the small diameter portion below the large diameter portion. A circumferential positioning pin is provided upright on this step. A male screw is formed on the outer peripheral surface at the upper end (opening) of the side wall of the lower meter case.

The measuring instrument has a container-like shape as a whole, and a cylindrical wall is disposed at the upper end of the measuring instrument. The radially inner side of the upper end of the cylindrical wall is covered by a lid including a transparent disc portion. It is blocked. The outer peripheral surface of the cylindrical wall of the measuring instrument is composed of a large diameter portion on the axial upper side and a small diameter portion on the lower side, and an annular upper step portion is formed between the large diameter portion and the small diameter portion. The lower end of the cylindrical wall of the measuring device is defined by an annular lower step portion that extends radially inward from the outer peripheral surface, and the outer peripheral surface at the lower end portion of the cylindrical wall has a notch for circumferential positioning that extends upward from the lower step portion. Has been formed. Inside the cylindrical wall of the measuring instrument, a total liquid sealing integration indicator is formed, and a rotary numerical indicator,
A pointer and the like are provided. The totalization instruction section can be visually recognized from above the measuring instrument through the transparent disk section. A rotation transmission mechanism including a plurality of gears is arranged axially below the integration instruction unit. The rotation transmission mechanism has an input gear. It should be noted that almost all the constituent members of the weighing device, except some, are made of an appropriate synthetic resin.

The metallic upper meter case has an annular main body and a lid which is provided on the outer peripheral portion of the main body so as to be openable and closable via hinge means. An internal thread is formed on the inner peripheral surface of the main body, and an annular pressing flange extending radially inward is formed on the upper end of the main body. On the outer peripheral surface of the main body, a plurality of protrusions for radially outwardly extending for clamping and unclamping operation are arranged at equal intervals in the circumferential direction. The inner peripheral surface of the pressing flange is formed in a flare shape whose inner diameter gradually increases from the lower side to the upper side in the axial direction. On the upper end surface of the upper meter case, that is, the upper end surface of the annular flange, predetermined items such as a certification date, a logo of a manufacturing / sales / repair company, an item number, etc. are generally engraved.

The measuring instrument is inserted into the inside of the lower meter case through the upper opening. The upper part of the weighing device is placed on the upper end surface of the lower meter case via a ring-shaped sealing member. The outer diameter of the seal member and the outer diameter of the side wall of the measuring instrument above the seal member are specified to be substantially the same as or slightly smaller than the outer diameter of the upper end surface of the lower meter case.
The circumferential positioning notch formed in the lower end portion of the side wall of the weighing instrument is fitted to the circumferential positioning pin provided in the step portion of the lower meter case, thereby
The relative mounting angular position in the circumferential direction with respect to the lower meter case is defined as a predetermined mounting angular position. The lower part of the scale is
The lower meter case is positioned so as to face the stepped portion of the lower meter case in the axial direction with a slight gap. The input gear included in the rotation transmission mechanism of the measuring instrument is detachably drive-coupled to the output gear of the impeller. As described above, the measuring instrument is mounted in the lower meter case in such a manner that only its upper end is exposed to the outside. The upper meter case is attached to the lower meter case via an annular washer member by engaging the female thread of the upper meter case with the male thread of the lower meter case. The washer member is interposed between the inner surface of the pressing flange of the upper meter case and the peripheral portion of the upper surface of the measuring instrument. The measuring instrument is clamped and fixed by the upper meter case to the lower meter case with only the totalization indicating section exposed to the outside. By opening and closing the lid provided on the upper meter case, the integration instruction unit of the measuring instrument can be exposed or closed to the outside.

Tap water flows from one of the conduit portions provided in the lower meter case through the lower meter case to the other. When tap water flows from one side of the conduit to the other, the impeller is rotated. The rotation of the impeller is transmitted to the rotation transmission mechanism of the measuring instrument via its output gear and the input gear of the measuring instrument. As a result, the rotation of the impeller is
Converted to the flow rate of tap water passing through the lower meter case,
Totalization / instruction is made in the totalization instruction section.

[0007]

In the water meter, which is a case unit provided with a measuring instrument, as described above, the relative mounting angular position of the measuring instrument in the circumferential direction with respect to the lower meter case is the circumferential direction. The positioning notch and the circumferential positioning pin always define the circumferential mounting angular position. However, the upper meter case is screwed to the lower meter case so that the measuring instrument is tightened and fixed. Therefore, depending on the tightening torque or the difference in the axial height of the measuring instrument, Upper meter case, lower meter case,
Therefore, the relative mounting angular position in the circumferential direction with respect to the measuring device is different. As a result, the instruction on the totalizing instruction section of the measuring instrument, specifically, the instruction by the rotary numerical value instruction section, the pointer, etc., and the certification date, manufacturing / sales / repair company etc. stamped on the upper end surface of the upper meter case The predetermined angular direction relative to the logo, the display of predetermined items such as the item number, etc. does not match, in other words, the above instruction and the entire display can be easily read from a certain viewpoint. Does not match the relative angular positions in the circumferential direction, making it difficult for an operator to read them, and makes it difficult to read instructions such as numerical values, pointers and the like in the integration instruction section and display of predetermined items.

On the other hand, the instrument number must be changed when the contractor changes, and in this case, after the instrument number portion on the upper end surface of the metal upper meter case is ground, I had to deal with it by re-engraving. For this reason, it is difficult to change the equipment number and it is difficult.
Moreover, the change work could not be carried out promptly.

The above problem is not limited to a water meter, but is commonly present in a case unit equipped with another meter having the same structure.

The present invention has been made based on the above facts, and its purpose is to provide an upper meter case, a lower meter case,
Therefore, regardless of the relative mounting angle position in the circumferential direction with respect to the measuring instrument, the indication in the totalizing instruction section of the measuring instrument, the display of the verification date, the logo of the manufacturer / sales / repair company, the predetermined number such as the instrument number, etc. It is possible to easily and surely match the relative mounting angle position in the circumferential direction with, and as a result,
It is an object of the present invention to provide a case unit equipped with a weighing instrument, which makes it easier to read an instruction in the totalization instruction unit and a display of a predetermined item as compared with the conventional case.

Another object of the present invention is to provide a case unit equipped with a weighing instrument, which enables an operation of changing an article number to be performed more easily and quickly than ever before.

Other objects and characteristics of the present invention will become apparent from the following description in detail with reference to the accompanying drawings regarding an embodiment of a case unit including a weighing device according to the present invention.

[0013]

According to the present invention, there is provided a lower meter case having a cylindrical side wall, and a weighing instrument mounted on the lower meter case so as to cover the opening of the side wall and having an indicator on the upper surface side. And a ring-shaped upper meter case, wherein the upper meter case is screw-engaged with the outer periphery of the opening of the side wall of the lower meter case to hold the measuring instrument in the opening of the side wall of the lower meter case. The case unit is provided with a display annular body on the upper surface side of which a predetermined matter is displayed, and the display annular body is a lock that allows locking at all relative angular positions in the circumferential direction with respect to the upper meter case. Mounted on the upper end of the upper meter case via a means,
There is provided a case unit including a weighing instrument.

It is preferable that predetermined items are directly displayed on the upper surface of the display annular body. It is preferable that a member to be displayed having a predetermined item displayed thereon is detachably attached to the upper surface of the display annular body. A locking groove is formed on the upper surface of the display annular body and extends continuously in the circumferential direction between one end and the other end positioned at intervals in the circumferential direction. It is preferable that a displayed member formed to display a predetermined matter and substantially aligned with the locking groove is detachably fitted. The display annular body has a lid between a closed position that closes the upper surface of the display annular body and the upper surface of the measuring instrument, and an open position that exposes the upper surface of the display annular body and the upper surface of the measuring instrument upward. The hinge means is mounted on the upper surface of the display annular body by opening and closing through the hinge means.
In the circumferential area where the locking groove is not formed, the radially inner area of the outer peripheral edge of the display annular body, and the lower surface of the lid,
It is preferable that the region is axially opposed to the region and is provided between the region and the radially inner region of the outer peripheral edge of the lid. An annular locking groove extending continuously in the circumferential direction is formed on the upper surface of the display annular body, and a predetermined item is displayed on the upper surface of the locking groove so that the locking groove is substantially aligned with the locking groove. The formed annular member to be displayed is detachably fitted,
It is preferable. The display annular body has a lid between a closed position that closes the upper surface of the display annular body and the upper surface of the measuring instrument, and an open position that exposes the upper surface of the display annular body and the upper surface of the measuring instrument upward. , Openably and closably attached via hinge means,
Each of the display annular body and the lid is formed with a projecting portion that extends radially outward from each outer circumferential edge and axially faces each other, and the hinge means is formed between each of the projecting portions. Is preferred. A plurality of locking holes are formed at intervals in the circumferential direction at the bottom of the locking groove,
A locked pin is arranged at a position aligned with each of the locking holes so as to extend from a lower surface of the display target member, and each of the locked pins of the display target member corresponds to a locking groove. It is preferable to be removably locked in the locking hole. The upper meter case includes an annular main body and an annular pressing flange extending inward in the radial direction from the upper end of the main body, and a cylindrical wall is provided at the upper end of the measuring instrument, and an outer peripheral portion of the cylindrical wall is provided. Is formed with an annular step portion that can be placed on the upper end surface of the side wall of the lower meter case, an internal thread is formed on the inner peripheral surface of the main body, and the outer peripheral surface of the upper end portion of the side wall of the lower meter case is formed. A male screw is formed, and the female screw of the main body of the upper meter case is engaged with the male screw of the side wall of the lower meter case to force the peripheral portion of the upper surface of the measuring instrument toward the lower meter case by the lower surface of the holding flange. The step portion of the cylindrical wall of the measuring instrument is pressed against the upper end surface of the side wall of the lower meter case by means of an annular synthetic resin washer & connecting member between the peripheral portion of the upper surface of the measuring instrument and the lower surface of the pressing flange. Intervening, washer &
The connecting member includes a washer portion and a locking cylindrical portion that extends upward from a radially inner end portion of the washer portion, and a engaged member that extends downward at a radially inner end portion of the lower surface of the display annular body. A stop cylinder is formed, and the locking means is formed between the lock cylinder of the washer & connecting member and the locked cylinder of the display annular body positioned to face each other in the radial direction, It is preferable. The locking means includes one of an annular locking groove or an annular locking projection formed on one of the inner peripheral surface and the outer peripheral surface of the locking cylindrical portion of the washer & connecting member, and the inner peripheral surface or the inner peripheral surface. An annular locked projection or an annular locked recess formed on one of the outer peripheral surface and the inner peripheral surface of the locked cylindrical portion of the display annular body, which is positioned so as to face the outer peripheral surface. It is preferably formed from one of them. The inner peripheral surface of the pressing flange of the upper meter case is formed in a flared shape so that the inner diameter gradually increases from the lower side to the upper side in the axial direction, and the locking cylindrical portion of the washer & connecting member is pressed down. Positioned radially inward of the inner peripheral surface of the flange, the locked cylindrical portion of the display annular body has an outer peripheral surface aligned with the outer peripheral surface of the locking cylindrical portion and an outer peripheral surface aligned with the inner peripheral surface of the pressing flange. A locking recess formed in the outer peripheral surface of the locking cylindrical portion, the locking means having a surface and positioned substantially in close contact between the outer peripheral surface of the locking cylindrical portion and the inner peripheral surface of the pressing flange. It is preferable that it is formed from a strip and a locked projection formed on the inner peripheral surface of the locked cylindrical portion. The locking means faces one of a ring-shaped locking recess or a ring-shaped locking projection formed on one of the inner side and the outer side in the radial direction of the peripheral surface of the upper meter case and one of the inner side and the outer side in the radial direction. It is preferably formed by one of an annular locked projection or an annular locked recess formed on one of the outer side and the inner side of the peripheral surface of the display annular body in the radial direction. .

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of a water meter, which is a typical example of a case unit having a measuring instrument constructed according to the present invention, will be described in detail below with reference to the accompanying drawings.

Referring to FIGS. 1 to 3, reference numeral 100 is used as a whole.
The water meter shown by means a lower meter case 10 having a cylindrical side wall 11, a meter 20 attached to the lower meter case 10 so as to cover the opening of the side wall 11 and having an indicator 21 on the upper surface side, and an annular shape. Upper meter case 30 and measuring instrument 2
0 and the upper meter case 30 include an annular washer and connecting member 40 and a display annular body 50 mounted on the upper meter case 30.

The metal lower meter case 10, which may be of a known construction per se, includes a bottom wall 12 having a substantially disc shape, and a cylindrical side wall 11 extends upward from a peripheral edge of the bottom wall 12. Is formed integrally. A pair of conduit portions 13 extending outward in the radial direction are integrally formed at the lower end portion of the side wall 11. As shown in FIG. 2, each of the conduit portions 13 is arranged at a position slightly deviated to one region divided by a straight line passing through the axis when the lower meter case 10 is viewed in the axial direction. Each of the through holes 13a of the conduit portion 13 is formed so as to extend from the outer side to the inner side in the radial direction and slightly incline toward the inner peripheral surface side of the side wall 11 in the region on the one side. Lower meter case 1
A support shaft 12a is fixed to the shaft center portion of the bottom wall 12 of 0 so as to extend upward from the upper surface thereof. This support shaft 12
An impeller 14 is rotatably and detachably supported on a. A prop 14a extending upward is formed at the axial center of the impeller 14 that can be integrally molded from an appropriate synthetic resin, and an output gear (not shown) is integrally formed at the upper end of the prop 14a. A large diameter portion 11a is formed on the inner peripheral surface of the upper end of the cylindrical side wall 11. The large-diameter portion 11a is formed so as to have a constant width axially downward from the upper end of the side wall 11 and to extend over the entire circumference.
Large diameter portion 11a and small diameter portion 11 below the large diameter portion 11a
An annular stepped portion 11c is formed between it and b. The upper end surface of the side wall 11 and the stepped portion 11c are positioned on a plane orthogonal to the axis of the lower meter case 10. A positioning pin 15 is provided upright at a predetermined circumferential position on the stepped portion 11c. A male screw 11d is formed on the outer peripheral surface at the upper end (opening) of the side wall 11. In FIG. 1, reference numeral 16 indicates a rib arranged on the lower surface of the bottom wall 12 of the lower meter case 10, and the ribs are arranged so as to form a 90 ° circumferential angle with respect to the axial center portion of the lower wall of the bottom wall 12. It is arranged so as to extend linearly in the radial direction.

The weighing machine 20, which may be of a known construction per se, is shaped like a container having a generally circular outer circumference, with a cylindrical wall 21 at its upper end.
Is provided. The inner side in the radial direction of the upper end portion of the cylindrical wall 21 is sealed by a lid body (not shown) including a disc portion formed of transparent synthetic resin or glass. The outer peripheral surface of the cylindrical wall 21 of the weighing device 20 is configured by an axially upper large diameter portion 21a and a lower small diameter portion 21b, and an annular upper step portion 21c is provided between the large diameter portion 21a and the small diameter portion 21b. Are formed. The large diameter portion 21a is used for the lower meter case 10.
Is formed to have a larger diameter than the inner peripheral surface of the upper end (large diameter portion 11a). The lower end of the cylindrical wall 21 of the measuring device 20 is defined by an annular lower step portion 21d extending radially inward from the outer peripheral surface. The upper end surface of the cylindrical wall 21, the upper step portion 21c, and the lower step portion 21d are positioned on a plane orthogonal to the axis of the weighing machine 20. A notch 22 for circumferential positioning that extends upward from the lower step portion 21d is formed on the outer peripheral surface of the lower end portion of the cylindrical wall 21. Cylindrical wall 2 of weighing device 20
In the inside of 1, a total liquid sealing integration indicator (not shown) is formed. A rotary numerical value indicating portion, a pointer, and the like are arranged in the integration indicating portion, and these can be visually recognized from above the weighing instrument 20 through the transparent disc portion. Although not shown, a disc-shaped bottom wall is provided at the lower end of the weighing device 20, and a plurality of arcuate plate-shaped support columns are arranged at the peripheral edge of the bottom wall at intervals in the circumferential direction. A cylindrical wall 21 including a totalization instruction portion is supported at the upper end of each of the columns. A rotation transmission mechanism (not shown) including a plurality of gears is arranged in a space between the bottom wall of the weighing device 20 and the integration instruction unit. The rotation transmission mechanism has an input gear. In addition, almost all of the constituent members of the weighing device 20 except a part are made of an appropriate synthetic resin.

The metallic upper meter case 30 has an annular (cylindrical) main body 31 and an annular pressing flange 32 extending inward in the radial direction from the upper end of the main body 31. A female screw 31a is formed on the inner peripheral surface of the main body 31,
On the outer peripheral surface of the main body 31, four protrusions 31b for outwardly extending in the radial direction for clamping and unclamping operation are arranged at equal intervals in the circumferential direction. The upper surface and the lower surface of the pressing flange 32 are positioned on a plane orthogonal to the axis of the upper meter case 30. As clearly shown in FIGS. 1 and 3, the inner peripheral surface of the pressing flange 32 is an inclined surface that is inclined so that its inner diameter gradually increases from the lower side to the upper side in the axial direction of the upper meter case 30. Is formed into a flare shape. A notch 33 having a small-diameter portion and an annular step is formed at a corner between the outer peripheral surface of the upper meter case 30 and the upper surface of the pressing flange 32 (the upper end surface of the upper meter case 30). There is. Notch 33
The step portion of is positioned on a plane orthogonal to the axis of the upper meter case 30.

The scale 20 is inserted into the inside of the cylindrical side wall 11 of the lower meter case 10 through the upper end opening. The upper step portion 21c of the weighing instrument 20 is placed on the upper end surface of the side wall 11 of the lower meter case 10 via the ring-shaped seal member 2. Seal member 2 having a thin plate rectangular cross section
And the outer diameter of the large-diameter portion 21a of the cylindrical wall 21 of the measuring device 20 positioned above the seal member 2 are substantially the same as the outer diameter of the upper end surface of the cylindrical side wall 11 of the lower meter case 10. Or, it is specified to be slightly smaller. The circumferential positioning notch 22 formed in the lower end portion of the side wall 21 of the weighing instrument 20 is fitted to the circumferential positioning pin 15 provided in the step portion 11c of the lower meter case 10. The relative mounting angular position of the measuring device 20 in the circumferential direction with respect to the lower meter case 10 is defined as a predetermined mounting angular position. The lower step portion 21d of the weighing instrument 20 is positioned so as to face the step portion 11c of the lower meter case 10 in the axial direction with a slight gap. An input gear included in the rotation transmission mechanism of the measuring device 20 is detachably drivably coupled to an output gear of the impeller 14. As described above, the weighing instrument 20 is mounted in the lower meter case 10 in such a manner that only the upper end portion (the large diameter portion 21a of the cylindrical wall 21) is exposed to the outside. The upper meter case 30 has a female screw 31a formed on the side wall 11 of the lower meter case 10 and a male screw 11d.
Is engaged with the side wall 1 of the lower meter case 10.
It is attached to 1. Upper meter case 3 as above
By screwing 0 to the lower meter case 10,
The peripheral portion of the upper surface of the weighing device 20 is forced downward in the axial direction toward the lower meter case 10 by the lower surface of the pressing flange 32 of the upper meter case 30. In the measuring instrument 20, the step portion 21 c of the cylindrical wall 21 of the measuring instrument 20 is provided on the side wall 11 of the lower meter case 10.
It is pressed against the upper end surface of and is detachably attached to the lower meter case 10.

Between the peripheral portion of the upper surface of the weighing instrument 20 and the lower surface of the pressing flange 32 of the upper meter case 30,
An annular synthetic resin washer & connecting member 40 is interposed. For example, the washer & connecting member 40 which can be integrally formed from an appropriate synthetic resin such as polycarbonate is
A circular ring-shaped washer portion 41 having a thin plate rectangular cross section
And a locking cylindrical portion 42 that extends upward at a right angle from the radially inner end of the washer portion 41. On the outer peripheral surface of the locking cylindrical portion 42, an annular locking recess 42a is formed so as to extend over the entire circumference. Locking groove 42a
The cross section of is not limited to this shape, but has a substantially rectangular shape. The washer portion 41 of the washer & connecting member 40 is provided with the pressing flange 3 of the upper meter case 30.
It is interposed in a sandwich shape between the lower surface of 2 and the peripheral portion of the upper surface of the weighing device 20, and the locking cylindrical portion 42 is positioned radially inward of the inner peripheral surface of the pressing flange 32. The outer peripheral surface of the locking cylindrical portion 42 of the washer & connecting member 40 is positioned so as to face the inclined inner peripheral surface of the pressing flange 32, and an annular gap having a substantially V-shaped cross section is formed therebetween. It The upper meter case 30 is tightened to the lower meter case 10 with a predetermined tightening torque by using each of the protrusions 31b formed on the outer peripheral surface of the main body 31 of the upper meter case 30 by a screw tightening device (not shown). To be Due to the tightening, the outer peripheral edge portion of the upper surface of the weighing machine 20 is the washer portion 41 of the washer & connecting member 40.
Via the lower surface of the holding flange 32 of the upper meter case 30, the lower meter case 10 is forced downward in the axial direction. The upper step portion 21c of the cylindrical wall 21 of the measuring instrument 20 is pressed against the upper end surface of the side wall 11 of the lower meter case 10 via the seal member 2 to form a sealed space in the lower meter case 10 through which tap water passes. To be done. The weighing device 20 includes a large-diameter portion 21 of a cylindrical wall 21 including an integration instruction portion.
It is attached to the lower meter case 10 in a state where only a is exposed to the outside.

Referring to FIGS. 3 and 4, the display annular body 50, which can be integrally formed from an appropriate synthetic resin such as polycarbonate, has a circular ring shape as a whole, and has an upper surface orthogonal to its axis. It has a lower surface 50a and a lower surface 50b. On the lower surface 50b of the display annular body 50, adjacent to the radially outer side of the radially inner edge region extending over the entire circumference with a constant radial width, the lower surface 50b extends downward in the axial direction. The formed locked cylindrical portion 51 and the annular outer hanging wall 52 that extends downward in the axial direction from the lower surface 50b at a constant distance radially outside the locked cylindrical portion 51 are provided. . The inner peripheral surface of the outer hanging wall 52 defines a radially outer edge of the lower surface 50b of the display annular body 50, and the outer peripheral surface of the outer hanging wall 52 is
The radial outer peripheral edge of the display annular body 50 is defined. Further, the inner diameter of the outer hanging wall 52 is substantially closely fitted to the outer peripheral surface of the small diameter portion of the notch 33 formed at the corner between the outer peripheral surface of the upper meter case 30 and the upper surface of the pressing flange 32. The size is defined as possible. The inner diameter of the inner peripheral surface of the locked cylindrical portion 51 is defined so that it can be fitted to the outer peripheral surface of the locked cylindrical portion 42 of the washer & connecting member 40, and the outer peripheral surface of the locked cylindrical portion 51 is The inclined surface is formed so that it can substantially come into close contact with the inclined inner peripheral surface of the pressing flange 32 of the meter case 30. On the inner peripheral surface of the locked cylindrical portion 51, there is provided an annular locked protruding ridge 51a capable of engaging with the locking recess 42a formed on the outer peripheral surface of the locking cylindrical portion 42 of the washer & connecting member 40. It is formed so as to extend over the entire circumference. The cross section of the locked projection 51a is not limited to this shape, but is substantially rectangular. As shown in FIG. 4, the display annular body 50 has its inner peripheral edge (face) and outer peripheral edge (face) positioned concentrically when viewed in the axial direction. As shown in FIG. 3, the inner peripheral surface of the display annular body 50 is formed so as to extend parallel to the axis line at the lower end in the axial direction, but between the lower end and the upper end. Is formed in a flare shape having an inclined surface whose diameter gradually increases from the lower end toward the upper end.

On the upper surface 50a of the display annular body 50, one end 53a and the other end 5 are arranged at intervals in the circumferential direction.
A locking groove 53 is formed so as to extend in a circular shape continuously in the circumferential direction between 3b (see FIG. 4). The locking groove 53 has a constant circumferential width and a constant axial depth, and has the annular display body 5.
It is formed so as to extend concentrically with 0, and its cross section has a rectangular shape that extends in parallel with the upper surface 50a. A groove 54 extending to face the locking groove 53 is formed on the lower surface 50b of the display annular body 50. The cross section of the groove 54 is also substantially rectangular. A partition wall having a constant thickness is formed between the bottom surface of the locking groove 53 and the bottom surface of the groove 54,
A plurality of, in the embodiment, seven locking holes 55 are formed in the partition wall at intervals in the circumferential direction.

A predetermined member is displayed on the upper surface of the locking groove 53 (not shown), and a member to be displayed 60 formed so as to be substantially aligned with the locking groove 53 is detachably fitted. Figure 5
As shown in FIG. 4, the display target member 60 is formed so as to continuously extend in a circular shape in the circumferential direction between one end 60a and the other end 60b positioned at intervals in the circumferential direction, and The cross section is rectangular. Therefore, the display target member 60 has a shape obtained by removing a part of the thin plate ring body in the circumferential direction. The locking hole 55 formed in the locking groove 53 of the display annular body 50 of the displayed member 60.
The locked pins 61 are arranged so as to extend at a right angle from the lower surface of the displayed member 60 at the position aligned with each of the above. Each of the locked pins 61 of the displayed member 60 is
By being removably locked in the corresponding locking holes 55 of the locking groove 53 of the display annular body 50, the locking groove 53 of the display annular body 50 is removably fitted and mounted in the locking groove 53. With the displayed member 60 attached to the display annular body 50,
The upper surface of the displayed member 60 is the upper surface 50 of the display annular body 50.
It is located substantially on the same plane as a. Displayed member 60
Although not shown in the drawing, predetermined items such as the certification date, the logo of the manufacturing / sales / repair company, and the instrument number are displayed on the upper surface of the. Of these, the certification date and the logo of the manufacturer, sales, repairer, etc. can be integrally formed at the time of injection molding of the displayed member 60, and the instrument number can be stamped by a stamping machine not shown after injection molding. Can be formed by.

On the upper surface 50a side of the display annular body 50, between the one end 53a and the other end 53b of the locking groove 53, in the circumferential region where the locking groove 53 is not formed, and further, the display annular shape. In the radially inner region of the outer peripheral edge of the body 50, a substantially crescent-shaped flat surface 50c is formed when viewed in the axial direction from above. The flat surface 50c is the upper surface 5 of the display annular body 50.
It is formed so as to be lower than 0a and parallel to the upper surface 50a, and the boundary between the flat surface 50c and the upper surface 50a is formed to extend parallel to a tangent line (not shown) of the display annular body 50. There is. A grip portion 56 is formed at the central portion of the flat surface 50c in the tangential direction so as to extend upward from the flat surface 50c in the axial direction. Grip part 56
Extend upward from the upper end of the base portion having a substantially rectangular parallelepiped shape at intervals in the radial direction, and the display annular body 50 is provided.
A pair of grip side walls 56 extending parallel to the tangential direction of the
a and 56b. A holding groove 56c having an open upper end and both ends in the tangential direction is formed between the grip side walls 56a and 56b. In the cross section of the holding groove 56c, most of the lower part of the holding groove 56c except the upper end has a circular inner peripheral surface, and the radial width of the upper end opened upward is larger than the diameter of the circular inner peripheral surface. Is also narrowed. Both side surfaces that define both ends of the grip portion 56 in the tangential direction are formed so as to extend perpendicular to the tangent line and parallel to each other when viewed in the axial direction of the display annular body 50.

The display annular body 50 constructed as described above.
A lid 70 is attached to the lid so that it can be opened and closed. With reference to FIGS. 3, 4 and 6, a lid 70 that can be integrally formed from an appropriate synthetic resin such as polycarbonate except for a hinge pin 73 described later is provided with an outer peripheral edge of the display annular body 50. It has a substantially disk shape having an outer peripheral edge of substantially the same diameter, and is provided with a lower surface 70a which can be detachably adhered to the upper surface 50a of the display annular body 50 from above. Lower surface 70a
A plurality of arcuately extending grooves 71 are formed at intervals in the circumferential direction. The groove 7 on the lower surface 70a side of the lid 70
In the circumferential region where 1 is not formed and in the radially inner region of the outer peripheral edge of the lid 70, the crescent moon is substantially aligned with the crescent-shaped flat surface 50c formed on the upper surface side of the display annular body 50. A flat surface 70b having a shape is formed. The flat surface 70b is formed at a position retracted axially upward from the lower surface 70a of the lid 70 and on a surface parallel to the lower surface 70a. The boundary between the flat surface 70b and the lower surface 70a is formed so as to extend parallel to a tangent line (not shown) of the lid 70.

At the central portion in the tangential direction of the flat surface 70b,
A pair of support flange portions 72 are formed so as to extend downward from the flat surface 70b in the axial direction at intervals in the tangential direction of the lid 70. The side surfaces of each of the support flange portions 72, which face each other in the tangential direction, are formed so as to be orthogonal to the above tangent line of the lid 70 and extend at a right angle to the flat surface 70b. The space formed between each of the support flange portions 72 is defined to have a size such that they can be relatively movably fitted to each other across the both side surfaces of the grip portion 56 of the display annular body 50. Through holes 72a having the same diameter are formed in each of the support flange portions 72. Each of the through holes 72a has a common axis extending in the tangential direction. A hinge pin 73 is attached to each through hole 72a of the support flange portion 72. Hinge pin 7 with a retaining head at one end
After being inserted into each of the through holes 72a, the other end 3 is caulked at the other end so as to extend between the respective support flange portions 72 and not to come out in the axial direction.

In the lid 70 constructed as described above, the hinge pins 73 extending between the support flange portions 72 are detachably fitted into the holding grooves 56c of the grip portion 56 of the annular display body 50. As a result, it is mounted on the display annular body 50 so as to be freely opened and closed. The diameter of the hinge pin 73 is formed to be substantially the same as the circular inner peripheral surface of the holding groove 56c in the grip portion 56 of the display annular body 50, and the holding groove 56c is also formed.
The upper radial width of the upper end of the hinge pin 7 is
The diameter is smaller than 3. Hinge pin 73
Is forced into the holding groove 56c from above, the grip side walls 56a and 56b are elastically deformed in a direction away from each other in the radial direction, and the hinge pin 73 is allowed to pass through the radial gap at the upper end of the holding groove 56c. The hinge pin 73 is fitted in the holding groove 56c so as to be relatively rotatable. The hinge pin 73 is elastically gripped by the grip side walls 56a and 56b so as to prevent the hinge pin 73 from being axially upwardly separated from the display annular body 50. Each of the support flange portions 72 of the lid 70 is positioned so as to sandwich the above-mentioned both side surfaces of the grip portion 56 of the display annular body 50, and
Detachment in the tangential direction to the display annular body 50 is prevented.

The grip portion 56 of the display annular body 50 including the holding groove 56c, the supporting flange portions 72 of the lid 70, and the hinge pins 73 supported between the supporting flange portions 72 are hinge means. Constitute. The hinge means is a circumferential area of the upper surface of the display annular body 50 where the locking groove 53 is not formed, and is a radial inner area of the outer peripheral edge of the display annular body 50 and the lid 70. On the bottom,
It is a region that faces the region in the axial direction and is provided between the region and the radially inner region of the outer peripheral edge of the lid 70. As will be easily understood from the above description,
The mounting on the display annular body 50 can be easily performed with one touch, which is practically convenient. When the lid 70 is detached from the display annular body 50 as necessary, the hinge pin 73 in the holding groove 56c is moved toward the gap between the upper ends of the grip side walls 56a and 56b. This is easily possible by forcing axially upwards with respect to 50.

Referring to FIG. 3, the display annular body 50 having the lid 70 attached thereto is attached to the upper end portion of the upper meter case 30. Specifically, the locking cylindrical portion 51 of the display annular body 50 is replaced with the locking cylindrical portion 42 of the washer & connecting member 40.
On the other hand, by moving the locking cylindrical portion 51 of the display annular body 50 in the axial direction from the upper side to the lower side in a state of being aligned substantially coaxially, the locking cylindrical portion 42 of the washer & connecting member 40 is moved. Is inserted from above in the axial direction into a ring-shaped gap having a substantially V-shaped cross section between the outer peripheral surface and the inclined inner peripheral surface of the pressing flange 32 of the upper meter case 30. The locked projection 51a formed on the inner peripheral surface of the locking cylindrical portion 51 of the display annular body 50 has the locking cylindrical portion 42 of the washer & connecting member 40.
Is elastically deformed inward in the radial direction to get over and is locked by the locking projection 42a of the locking cylindrical portion 42. As a result, the annular display body 50 is prevented from being disengaged from the washer & connecting member 40, and thus the pressing flange 32 of the upper meter case 30, in the axially upward direction. The inner peripheral surface of the locking cylindrical portion 51 of the display annular body 50 is fitted substantially in close contact with the outer peripheral surface of the locking cylindrical portion 42 of the washer & connecting member 40, and the outer peripheral surface of the locking cylindrical portion 51. Is
The pressing flange 32 is fitted in close contact with the inner peripheral surface of the pressing flange 32. In addition, the inner peripheral surface of the outer hanging wall 52 of the display annular body 50 has a notch 3 formed at a corner between the outer peripheral surface of the upper meter case 30 and the upper surface of the pressing flange 32.
The outer peripheral surface of the small-diameter portion 3 is fitted substantially in close contact. The lower surface 50b of the display annular body 50 includes the upper end surface of the pressing flange 32 of the upper meter case 30 and the washer & connecting member 4.
0 is placed in close contact with the upper end surface of the locking cylindrical portion 42.

The display annular body 50 to which the lid 70 is attached is
The upper meter case 30 is mounted on the upper end portion thereof as described above. The locking recess 42a formed on the outer peripheral surface of the locking cylindrical portion 42 of the washer & connecting member 40, and the display annular body 5
The locked projection 51a formed on the inner peripheral surface of the locked cylindrical portion 51 of 0 constitutes a locking means for mounting the display annular body 50 on the upper end of the upper meter case 30. This locking means allows and locks the display annular body 50 at all relative angular positions in the circumferential direction with respect to the washer & connecting member 40, and thus with respect to the upper meter case 30, and thus with the weighing instrument 20. After that, the display annular body 50
To prevent the washer & coupling member 40 from being disengaged from the upper meter case 30 in the axial direction.
It is possible to attach to the upper end of the. When the display annular body 50 is attached to the upper end portion of the upper meter case 30, the lid 70 closes the upper surface of the display annular body 50 and the upper surface of the weighing machine 20 (indicated by a solid line in FIGS. 1 and 3). Center) and the open position (the position indicated by the chain double-dashed line in FIG. 1) that exposes the upper surface of the display annular body 50 and the upper surface of the weighing instrument 20 upward (the position indicated by 2). As a result, it can be freely turned. Water meter 100
However, the lid 70 is positioned at the closed position in a state where the lid 70 is attached to the tap water flow path (not shown) via the conduit portion 13 of the lower meter case 10, but the lid 70 is located at the closed position. If necessary, the hinge means can be easily swung from the closed position to the open position when the display on the upper surface of the display target member 60 mounted on the annular body 50 is read. Furthermore, it is also possible to swivel easily from the open position to the closed position.

As can be easily understood from the above description, in the water meter 100, the locked cylindrical portion 51 of the display annular body 50 is substantially aligned with the locked cylindrical portion 42 of the washer & connecting member 40. Mounting the display annular body 50 with the lid 70 mounted on the upper end portion of the upper meter case 30 by a simple operation of axially moving from the upper side to the lower side in a coaxially aligned state. You can Of course, after the display annular body 50 is attached to the locking cylindrical portion 42 of the washer & connecting member 40 with the lid 70 not attached,
It is also possible to easily attach the lid 70 to the display annular body 50. In addition, the upper meter case 30 of the display annular body 50
The upper end of the display annular body 50 is locked by forcibly fitting the locked cylindrical portion 51 of the display annular body 50 into the locking cylindrical portion 42 of the washer & connecting member 40. Cylindrical part 51
Of the locked protrusion 51a formed on the inner peripheral surface of the washer &
Since the locking is performed by locking the locking recess 42a formed on the outer peripheral surface of the locking cylindrical portion 42 of the connecting member 40,
The annular body 50 for display is attached to the washer & connecting member 40.
Therefore, it can be attached to the upper meter case 30 and therefore to the weighing device 20 at any relative angular position in the circumferential direction. Due to this,
Measuring instrument 20 in which the relative mounting angular position of the upper meter case 30 with respect to the lower meter case 10, and thus the lower meter case 10, in the circumferential direction is regulated to a predetermined mounting angular position.
Regardless of the relative mounting angular position in the circumferential direction with respect to, the verification date displayed on the displayed member 60 of the display annular body 50, the manufacturing / sales / repair company, in response to the instruction in the integration instruction section of the weighing instrument 20. It is possible to easily and surely match the relative position in the circumferential direction with the logo, etc., the display of a predetermined item such as an article number, etc. to the optimum reading position. As a result, it is possible to make the reading operation of the instruction and the display of the predetermined item in the integration instruction unit easier than ever before.

In the water meter 100, a locking groove 53 is formed on the upper surface of the display annular body 50 so as to continuously extend in the circumferential direction between one end and the other end positioned at intervals in the circumferential direction. Since the required member is displayed on the upper surface of the locking groove 53 and the displayed member 60 formed so as to be substantially aligned with the locking groove 53 is detachably fitted, the contractor is changed, When it is necessary to change the item number, the displayed member 60 is removed from the locking groove 53 of the display annular body 50, and another displayed member 60 having a new item number stamped is locked. This can be dealt with by inserting and locking each of the pins 61 into the corresponding locking holes 55 of the locking groove 53 and fitting and mounting in the locking groove 53 of the display annular body 50. As a result, it becomes possible to perform the work of changing the article number more easily and quickly than in the conventional case.

In the water meter 100, the lid 70 is attached to the display annular body 50 so as to be openable and closable via the hinge means, and the hinge means has the locking groove 53 on the upper surface of the display annular body 50. A circumferential region that is not formed, that is, a radially inner region of the outer peripheral edge of the display annular body 50,
Since the lower surface of the lid 70 is axially opposed to the area and is provided between the outer peripheral edge of the lid 70 and the radially inner area, the hinge means serves as the outer periphery of the display annular body 50. Since the water meter 100 does not project radially outward from the surface, the structure of the water meter 100 can be made compact and the appearance can be improved.

The water meter 1 shown in FIGS.
In the embodiment of No. 00, the hinge means is the display annular body 5.
An annular locking groove 53 extending continuously in the circumferential direction is formed on the upper surface of the display annular body 50 while maintaining the configuration in which it does not project radially outward from the outer peripheral surface of 0. However, another embodiment can be formed in which the ring-shaped displayed member 60, which is formed so as to display the required items on the upper surface and is substantially aligned with the locking groove 53, is detachably fitted into the locking groove 53. Is. In the case of this embodiment, the hinge means is made slightly compact, and the inner diameter of the display annular body 50 is made slightly smaller to increase the area of the upper end surface thereof. Further, in the portion where the hinge means is disposed, Locking groove 53
And a shape such that the outer peripheral portion of the displayed member 60 is removed into a substantially crescent shape (the outer peripheral surfaces of the locking groove 53 and the displayed member 60 at the same positions in the circumferential direction are straight surfaces that are parallel to the tangent line). The shape can be established by setting such that In this embodiment, the displayed member 60 (see FIGS. 1 to 6) in the water meter 100.
The display range of the above-described predetermined items is expanded as compared with the display target member 60) included in the water meter 100 shown in FIG.
It becomes possible to perform the reading operation of the display of the predetermined item more easily, and as a result, it becomes possible to perform the reading operation of the instruction of the integration instruction unit and the display of the predetermined item more easily and quickly. Moreover, the hinge means is the display annular body 5.
Since the structure which does not project outward in the radial direction from the outer peripheral surface of 0 is held, the effect that the structure of the water meter 100 can be made compact and the appearance can be improved is also held. In this embodiment, the visible area of the indicator of the weighing machine 20 is slightly reduced,
There is no practical problem.

In the water meter 100, the locking means for mounting the display annular body 50 on the upper end of the upper meter case 30 is a member formed on the outer peripheral surface of the locking cylindrical portion 42 of the washer & connecting member 40. Stop groove 42a and display annular body 5
0 of the locked cylindrical portion 51 is formed on the inner peripheral surface of the locked cylindrical portion 51. There is another embodiment in which the locking means is formed by forming a locked recessed line on the inner peripheral surface of the locked cylindrical portion 51 of the display annular body 50. Further, the outer peripheral surface of the locked cylindrical portion 51 of the display annular body 50 is formed into a shape that can be fitted to the inner peripheral surface of the locking cylindrical portion 42 of the washer & connecting member 40, and the above-described locking is provided between the both. There is still another embodiment in which the locking means composed of the concave line and the locked projected line or the locking means composed of the locking projected line and the locked concave line is formed. Furthermore, the locking means is formed by press-fitting the outer peripheral surface or the inner peripheral surface of the locked cylindrical portion 51 of the display annular body 50 into the inner peripheral surface or the outer peripheral surface of the washer & connecting member 40. There are still other embodiments.

The washer & connecting member 40 is composed of a washer portion 41 and a locking cylindrical portion 42 extending upward from the inner end of the washer portion 41 in the radial direction, and thus is the same as the washer member in the conventional water meter 100. Since it can be formed by integrally adding the locking cylindrical portion 42, it can be easily put into practical use at a relatively low cost. Further, since the upper meter case 30 can be used as an in-stock item without changing its configuration, it contributes to the practical application of the present invention at a relatively low cost. After the stock of the upper meter case 30 is no longer present, by stopping the formation of the hinge pin insertion hole formed in the projection 31b for the tightening and untightening operation, which is conventionally required. As a result, it is possible to further reduce the processing cost of the upper meter case 30.

The locking means for mounting the display annular body 50 on the upper end of the upper meter case 30 is the same as the locking cylindrical portion 42 of the washer & connecting member 40 and the display annular body 50 in the above-described embodiment. Although it is formed between the locked cylindrical portion 51 and the locked cylindrical portion 51, it is not limited to this portion, and an annular locking recess formed on one of the inner side and the outer side in the radial direction of the peripheral surface portion of the upper meter case 30. One of the strip or the annular locking projection,
An annular locked protrusion or an annular locked recess formed on one of the radially outer side and the inner side of the peripheral surface portion of the display annular body 50, which is positioned to face one of the radially inner side and the outer side. There is still another embodiment of the invention.

More specifically, the inner peripheral surface of the pressing flange 32 of the upper meter case 30 is not an inclined surface but an inclined surface.
The inner peripheral surface extends parallel to the axis of the upper meter case 30, the inner peripheral surface of the pressing flange 32, and the display annular body 50.
An embodiment is conceivable in which the above-described locking means is provided between the locked cylindrical portion 51 and the outer peripheral surface thereof. In this embodiment, one of an annular locking protrusion or an annular locking recess is formed on the inner peripheral surface of the pressing flange 32, and an annular shape is formed on the outer peripheral surface of the locked cylindrical portion 51 of the display annular body 50. One of the locked projection and the annular locked recess is formed. Further, an embodiment is conceivable in which the locking means as described above is provided between the outer peripheral surface of the upper end portion of the upper meter case 30 and the inner peripheral surface of the outer hanging wall 52 of the display annular body 50. In this embodiment, one of the annular locking projection or the annular locking recess is formed on the outer peripheral surface of the notch 33 of the upper meter case 30, and the inner circumference of the outer hanging wall 52 of the display annular body 50 is formed. One of an annular locked recess and an annular locked projection is formed on the surface. Furthermore, one of the annular locking projection or the annular locking recess is formed on the outer peripheral surface of the upper meter case 30 not having the notch 33, and the inner circumference of the outer hanging wall 52 of the display annular body 50 is formed. There is still another embodiment in which one of an annular locked concave line or an annular locked ridge is formed on the surface. There is also another embodiment in which the locking means formed between the peripheral surface portion of the upper meter case 30 and the peripheral surface portion of the display annular body 50 is formed by press fitting. Note that in these embodiments, the washer & connecting member 4
The locking cylindrical portion 42 at 0 is unnecessary and can be removed, and the configuration of only the washer portion 41, that is, the conventional configuration may be used.

FIG. 7 shows another embodiment of the water meter according to the present invention. The water meter 200 shown in FIG. 7 is different from the water meter 100 described above with reference to FIGS.
That the locking groove 53 formed on the upper surface of 0 and the member to be displayed 60 fitted into the locking groove 53 are formed in an annular shape that is continuous in the circumferential direction, and the hinge means of the lid 70 is an annular body for display. 50 and the lid 70 are arranged at positions projecting outward from the outer peripheral edge of the lid 70, and other configurations are substantially the same as those of the water meter 100 described above. However, the description is omitted.

In the water meter 200 shown in FIG. 7, an annular locking groove 53 extending continuously in the circumferential direction in a circular shape is formed on the upper surface of the display annular body 50. An annular displayed member 60, which is formed so as to display the above-described predetermined items on the upper surface and is substantially aligned with the locking groove 53, is detachably fitted into the locking groove 53. Display ring 50
A lid 70 is attached to the door so as to be openable and closable via hinge means. The display annular body 50 is formed with a protruding portion 57 that extends outward in the radial direction from the circular outer peripheral edge thereof.
7 is provided with a grip portion 56 having substantially the same configuration as described above. The lid 70 is formed with a protruding portion 74 that extends outward in the radial direction from the circular outer peripheral edge. A pair of support flange portions 72 (only one of which is shown in FIG. 7) having substantially the same configuration as described above is formed in the central portion of the protruding portion 74. Each of the support flange portions 72 is formed with a through hole 72a having substantially the same configuration as described above. A hinge pin 73 having substantially the same configuration as described above is mounted in each through hole 72a of the support flange portion 72.

In the lid 70 having the above-described structure, the hinge pins 73 extending between the support flange portions 72 are provided in the holding groove 56c of the grip portion 56 of the display annular body 50, as described above. The display ring 50 is openably and closably mounted by being removably fitted to the display annular body 50. A grip portion 56 of the display annular body 50 including the holding groove 56c.
Each of the support flange portions 72 of the lid 70 and the hinge pin 73 supported between each of the support flange portions 72 form a hinge means. Therefore, the hinge means is formed between the protruding portion 57 of the display annular body 50 and the protruding portion 74 of the lid 70. In other words, the hinge means is arranged between the radially outer region of the outer peripheral edge of the display annular body 50 and the radially outer region of the outer peripheral edge of the lid 70 that faces the region.

In the water meter 200 shown in FIG. 7, the ring-shaped displayed member 60 is detachably fitted and mounted in the ring-shaped locking groove 53 formed in the display ring-shaped body 50. Therefore, the display range of the predetermined item is expanded as compared with the display target member 60 in the water meter 100, and the display of the predetermined item can be more easily read, and as a result, the instruction in the integration instruction unit is displayed. Also, it becomes possible to more easily and quickly perform the reading operation of the display of the predetermined item. Since the water meter 200 has substantially the same configuration as the many characteristic configurations of the water meter 100 described above, the water meter 200 can achieve substantially the same effects as the water meter 100.

The case unit provided with the measuring instrument according to the present invention has been described above based on the embodiment. However, the present invention is not limited to the illustrated embodiment, and deviates from the scope of the technical idea of the present invention. It is possible to make various variations or modifications without using the above. For example, the case unit provided with the measuring instrument according to the present invention is the water meter 1 in the above embodiment.
Although shown as 00 and 200, the present invention is not limited to water meters, but includes a lower meter case having a cylindrical side wall and a top surface mounted on the lower meter case to cover the opening of the side wall. A meter having an indicator on its side and an annular upper meter case, and the upper meter case is screw-engaged with the outer periphery of the opening end of the side wall of the lower meter case, thereby bringing the meter into the side wall of the lower meter case. If it is a case unit equipped with a weighing instrument that is held in the opening of
The fluid to be measured may be any type of liquid or gas.

In the above embodiment, the test date,
Predetermined items such as logos of manufacturing / selling / repair companies, instrument numbers, etc. are displayed on the displayed member 60, and the displayed member 60 is detachably fitted / installed in the locking groove 53 on the upper surface of the display annular body 50. However, there is another embodiment in which the display target member 60 is detachably mounted on the upper surface of the display annular body 50 without forming the locking groove 53 on the upper surface thereof. In the case of this embodiment, the display annular body 50 has a plurality of locking holes 5.
5 is formed and a plurality of locked pins 61 are formed on the displayed member 60 correspondingly. Furthermore, in the above embodiment, the predetermined item is displayed on the display target member 60, but there is another embodiment in which the predetermined item is displayed directly on the upper surface of the display annular body 50.
In the case of this embodiment, when the contractor changes and it is necessary to change the item number, the display annular body 50 is replaced with another display annular body 50 on which a new item number is stamped. , Can be dealt with relatively easily. In addition, the replacement of the display annular body 50 is performed by the upper meter case 30.
By rotating the lower meter case 10 in the tightening release direction, the washer & connecting member 40 and the lid 7
0 is removed from the lower meter case 10 together with the attached display annular body 50, and then the washer & connecting member 40 and the display annular body 50 are elastically deformed to release their mutual locks and separated from each other. This can be accomplished by removing the lid 70 from the annular body 50. Since this embodiment does not use the display target member 60, the number of parts is reduced, and therefore the manufacturing cost can be reduced as compared with the above-described embodiments.

Furthermore, the locking means between the display annular body 50 and the upper meter case 30 is not limited to the above-described embodiment, and the circumference of the display annular body 50 with respect to the upper meter case 30 is not limited. Any configuration may be used as long as it is a locking means that allows locking at all relative angular positions in the direction. The locking means between the display annular body 50 and the upper meter case 30 is, as in the above embodiment, one of the ring-shaped locking recess or the ring-shaped locking projection and the ring-shaped locked. In the case of the configuration including one of the protrusion and the annular recessed recess, even if the engaging protrusion or the engaged protrusion is not formed in the annular shape but is formed discontinuously in the circumferential direction (in the circumferential direction, Even if a plurality of them are formed at intervals), the ring-shaped body for display 5 can be formed by forming the mating locked ridges or locking ridges in an annular shape.
It is possible to allow the locking of 0 at all relative angular positions in the circumferential direction with respect to the upper meter case 30.

[0047]

According to the case unit provided with the weighing instrument according to the present invention, the weighing unit of the weighing instrument can be installed regardless of the mounting angular position of the upper meter case relative to the lower meter case and thus the circumferential direction relative to the weighing instrument. It is possible to easily and surely match the relative mounting angle position in the circumferential direction between the instruction in the totalization instruction section and the display of the certification date, the logo of the manufacturing / sales / repair company, etc., and the display of predetermined items such as the equipment number. ,as a result,
It is possible to make the reading operation of the instruction and the display of the predetermined item in the totalization instruction unit easier than in the past. Further, it becomes possible to easily and quickly carry out the work of changing the article number as compared with the conventional case.

[Brief description of drawings]

FIG. 1 is a front view showing an essential part of an embodiment of a water meter, which is a typical example of a case unit equipped with a measuring device, configured according to the present invention.

FIG. 2 is a plan view of the water meter shown in FIG.

FIG. 3 is an enlarged view of a part of FIG.

FIG. 4 is a plan view of a display annular body provided in the water meter shown in FIG.

5 is a plan view of a display target member provided in the water meter shown in FIG.

FIG. 6 is a bottom view of a lid included in the water meter shown in FIG.

7 is a cross-sectional view similar to FIG. 2, showing a main part of another embodiment of a water meter, which is a typical example of a case unit having a measuring device, configured according to the present invention.

[Explanation of symbols]

10 Lower meter case 11 Cylindrical side wall 11d male screw 20 scales 30 Upper meter case 31a female screw 32 Holding flange 40 Washers & connecting members 42 Locking cylinder 42a locking recess 50 Display ring 51 Locked cylindrical part 51a Locked ridge 53 locking groove 60 Displayed member 70 Lid

Claims (12)

(57) [Claims] 1. A lower meter case having a cylindrical side wall,
A measuring instrument that is attached to the lower meter case so as to cover the opening of the side wall and has an indicator on the upper surface side, and an annular upper meter case, and the upper meter case is provided on the outer circumference of the opening of the side wall of the lower meter case. A case unit equipped with a weighing instrument, which holds the weighing instrument in the opening of the side wall of the lower meter case by screwing, is provided with a display annular body on the upper surface side of which a predetermined matter is displayed. The annular body is attached to the upper end of the upper meter case via a locking means that allows locking at all relative angular positions in the circumferential direction with respect to the upper meter case. Case unit. 2. The case unit provided with the weighing instrument according to claim 1, wherein predetermined items are directly displayed on the upper surface of the display annular body. 3. A case unit provided with a weighing instrument according to claim 1, wherein a member to be displayed having a predetermined item displayed thereon is detachably mounted on the upper surface of the display annular body. 4. An engagement groove is formed on the upper surface of the display annular body and extends continuously in the circumferential direction between one end and the other end positioned at intervals in the circumferential direction. The case unit with a weighing instrument according to claim 1, wherein a member to be displayed, which has a predetermined matter displayed on its upper surface and which is substantially aligned with the locking groove, is removably fitted in the case. 5. The display annular body includes a closed position where a lid closes the upper surface of the display annular body and the upper surface of the measuring instrument, and an open position for exposing the upper surface of the display annular body and the upper surface of the measuring instrument upward. The hinge means is mounted so as to be openable and closable via the hinge means, and the hinge means is a circumferential area of the upper surface of the display annular body where the locking groove is not formed, The radially inner region of the outer peripheral edge and a region of the lower surface of the lid axially opposed to the region, the region being provided between the radially inner region of the outer peripheral edge of the lid. Case unit equipped with a weighing machine. 6. An annular locking groove that extends continuously in the circumferential direction is formed on the upper surface of the display annular body, and the locking groove has:
The case unit provided with the weighing device according to claim 1, wherein an annular member to be displayed, which has a predetermined matter displayed on its upper surface and which is substantially aligned with the locking groove, is removably fitted. 7. The display annular body includes a closed position where a lid closes an upper surface of the display annular body and an upper surface of the measuring instrument and an open position for exposing the upper surface of the display annular body and the upper surface of the measuring instrument upward. The display annular body and the lid are mounted so as to be openable and closable between the position and the position by means of a hinge means. 7. A case unit with a scale as claimed in claim 6 in which the hinge means are formed between each of said protrusions. 8. A plurality of locking holes are formed in the bottom portion of the locking groove at intervals in the circumferential direction, and the locked pin is provided at a position of the displayed member aligned with each of the locking holes. Is arranged so as to extend from the lower surface of the displayed member, and each of the locked pins of the displayed member is detachably locked in the corresponding locking hole of the locking groove. A case unit comprising the measuring instrument according to claim 6. 9. The upper meter case includes an annular main body and an annular pressing flange that extends radially inward from an upper end of the main body, and a cylindrical wall is provided at an upper end of the measuring instrument. An annular step portion that can be placed on the upper end surface of the side wall of the lower meter case is formed on the outer peripheral portion of the wall, and an internal thread is formed on the inner peripheral surface of the main body, and the upper end portion of the side wall of the lower meter case is formed. A male thread is formed on the outer peripheral surface of the upper meter case, and the female thread of the main body of the upper meter case is engaged with the male thread of the side wall of the lower meter case, so that the peripheral edge of the upper surface of the measuring instrument is fixed to the lower meter case by the lower surface of the pressing flange. By pressing it toward the upper end surface of the side wall of the lower meter case by forcing it toward the upper surface of the lower meter case, and between the peripheral edge of the upper surface of the measuring instrument and the lower surface of the holding flange is made of an annular synthetic resin. Washer &
The connecting member is interposed, and the washer and the connecting member are composed of a washer portion and a locking cylindrical portion extending upward from a radially inner end portion of the washer portion, and a radially inner end portion of the lower surface of the display annular body. A locked cylindrical portion extending downward is formed in the locking means, and the locking means is a locking cylindrical portion of the washer & connecting member and a locked cylindrical portion of the display annular body which are positioned to face each other in the radial direction. Formed between and.
8. A case unit provided with the measuring instrument according to any one of 8. 10. The locking means includes one of an annular locking recess or an annular locking projection formed on one of the inner peripheral surface and the outer peripheral surface of the locking cylindrical portion of the washer & connecting member, and An annular locked projection or an annular locked member formed on one of the outer peripheral surface or the inner peripheral surface of the locked cylindrical portion of the display annular body, which is positioned so as to face the inner peripheral surface or the outer peripheral surface. The case unit provided with the weighing device according to claim 9, which is formed from one of the locking recesses. 11. The inner peripheral surface of the pressing flange of the upper meter case is formed in a flared shape so that the inner diameter is gradually expanded from the lower side to the upper side in the axial direction, and the washer & connecting member is locked. The cylindrical portion is positioned radially inward of the inner peripheral surface of the pressing flange, and the locked cylindrical portion of the display annular body is aligned with the outer peripheral surface of the locking cylindrical portion and the inner peripheral surface of the pressing flange. Has an outer peripheral surface aligned with the surface and is positioned substantially in close contact between the outer peripheral surface of the locking cylindrical portion and the inner peripheral surface of the pressing flange, and the locking means is formed on the outer peripheral surface of the locking cylindrical portion. The case unit provided with the weighing instrument according to claim 9, which is formed of a locked recessed line and a locked protruding line formed on the inner peripheral surface of the locked cylindrical portion. 12. The locking means includes one of a ring-shaped locking concave line or a ring-shaped locking projection formed on one of the inner side and the outer side in the radial direction of the peripheral surface portion of the upper meter case, and the inner side in the radial direction or It is formed of one of a ring-shaped locked projection or a ring-shaped recessed groove formed on one of the outer side and the inner side in the radial direction of the peripheral surface portion of the display annular body, which is positioned to face one of the outer sides. A case unit provided with the measuring instrument according to claim 1.