JP2003065822A - Diaphragm gas meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly conduct instrument error matching by simple work in a diaphragm gas meter. SOLUTION: In this diaphragm gas meter provided with a valve part B, a film part, and a rotary body Ra linked to the film part by a link mechanism L and rotation-operated by reciprocation motion of the film part, and provided with a link mechanism O for a valve part opening-and-closing operation for opening and closing the valve part in accompaniment to rotation of the rotary body Ra, an instrument error matching means S for regulating opening and closing timing in plural stages for the valve part with respect to a rotation phase around the rotary shaft center P of the rotary body Ra in a connection part 41 by plural stages of regulation for a link condition between the link part 41 and the valve part with respect to the rotary body Ra of the link mechanism L is motion-regulated by a large control input compared with a regulation amount between adjacent stages in the link condition, so as to regulate the link condition by motion-regulation of an operation body M for conducting regulation between the adjacent stages in the link condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve section for controlling gas supply / discharge to / from a measuring chamber, a film section reciprocating by supplying / exhausting gas to / from the measuring chamber, and a link mechanism for the film section. A membrane provided with a rotating body that is linked to each other and is rotated by the reciprocating motion of the membrane portion, and a linkage mechanism for opening and closing the valve portion that opens and closes the valve portion according to the rotation of the rotating body is provided. Gas meter.

[0002]

2. Description of the Related Art In such a membrane gas meter, it is necessary to perform so-called instrumental error matching, in which the relationship between the flow rate and the measurement error is adjusted to fall within a predetermined range. Conventionally, FIG.
8 and FIG. 19, as shown in FIG. 8 and FIG.
The adjustment plate 63 connected to is provided so as to be slidable and superposed on the fixing plate 64 so that it can be fixed by the two screws 66.
Adjusting hole 64h of fixed plate 64 and adjusted hole 64 of adjusting plate 63
A plurality of sets of adjustment holes consisting of h are provided, and the deviation amount between the adjustment hole 64h and the adjusted hole 64h is made different in each adjustment hole set, and the instrumental error matching is performed by loosening the two screws 66. The adjustment hole 64h of the adjustment hole set corresponding to the required instrumental error matching and the adjusted hole 64h are aligned by using the adjustment pin, and then the two screws 66 are tightened to perform the adjustment.

18 and 19, a reference numeral 61 is a crank shaft, a fixed plate 64 is connected to a crank arm 62 through a shaft body 65, and an adjusting plate 63 is around a crank rotation axis P. The fixed plate 64
On the adjustment plate 63 provided above, the connecting portion Lc of the link mechanism L is connected via the shaft 67 at a position eccentric from the connecting position of the fixed plate 64 with the crank arm 62. The adjustment hole 64h and the adjusted hole 64h are centered on the crank rotation axis P, and the center angles of the adjustment hole 64h are offset from each other along the circumference having a radius of the distance between the connection point Lc and the crank rotation axis P. In this state, the amount of deviation is different for each set of adjustment holes. Reference numeral 68 in the figure denotes a crank rod that connects a valve portion (not shown) to the crank arm 62.

That is, the fixing plate 64 is a film portion (not shown).
Corresponds to a rotating body Ra that is linked by a link mechanism L and is rotated by the reciprocating motion of the film portion of the crank arm 62.
The crank rod 68 corresponds to a valve portion opening / closing operation link mechanism O that opens / closes the valve portion according to the rotation of the rotating body Ra.

Incidentally, the crank rotation axis P and the shaft 65
Segment connecting the shaft centers of the crank, the crank rotation axis P, and the connecting portion Lc
Assuming that the angle θ formed by the line segment connecting the connection point of is the forward angle, in the instrumental error matching, the forward angle is, for example,
Around 90 °, the adjustment is made in multiple steps at 1 ° intervals back and forth. Therefore, the adjusting hole 64h and the adjusted hole 64h
The center angles for shifting and are different by 1 ° for each set of adjustment holes.

That is, in the instrumental error matching of the above-described conventional membrane gas meter, the adjusting plate 63 is swung in a plurality of steps around the crank rotation axis P with respect to the fixed plate 64 as the rotating body Ra.
By adjusting the connecting position of the connecting portion Lc of the link mechanism L with respect to the rotating body Ra around the crank rotation axis P to a plurality of stages, the connecting portion Lc of the link mechanism L with respect to the rotating body Ra can be adjusted.
And the valve section are adjusted in a plurality of stages, and the opening / closing operation timing of the valve section with respect to the rotation phase of the connecting portion Lc around the crank rotation axis P is adjusted in a plurality of stages by adjusting the plurality of stages. To do. Then, the instrumental error matching becomes an operation amount of the same amount as the adjustment amount in the adjacent stage in the linked state, that is, the adjustment amount of the connecting position around the crank rotation axis P of the rotating body Ra of the connecting portion Lc. Adjustment plate 63
The moving state is adjusted with respect to the rotating body Ra (that is, the fixed plate 64) to adjust the linked state.

[0007]

However, in the conventional membrane gas meter, in the instrumental error matching, the adjustment plate 63 is fixed to the fixed plate with the same operation amount as the adjustment amount in the adjacent stage in the linked state. Since the swing adjustment is performed with respect to 64, there is a problem that it is difficult to perform the instrumental error matching and it is difficult to appropriately perform the instrumental error matching, as described below. That is, as described above, the instrumental error matching needs to be adjusted with a small adjustment amount such as adjusting the advancing angle at 1 ° intervals. In the case of adjusting with the same amount of operation as the amount of adjustment in steps, it is necessary to swing the adjusting plate 63 with a small swing amount, which requires precise work and is difficult. Further, it is difficult to accurately oscillate the adjusting plate 63 with a target small amount of oscillating, and it is difficult to perform the instrumental error matching as desired.

The present invention has been made in view of the above circumstances, and an object thereof is to make it possible to properly perform instrumental error matching in a membrane gas meter by a simple operation.

[0009]

Means for Solving the Problems [Invention of Claim 1]
The characteristic configuration according to claim 1 is the rotation of the connecting portion around the rotation axis of the rotating body by adjusting the linking state of the connecting portion of the link mechanism with respect to the rotating body and the valve portion in multiple stages. The instrumental error matching means for adjusting the opening / closing operation timing of the valve portion with respect to the phase in a plurality of stages is moved and adjusted with a larger operation amount than the adjustment amount between the adjacent stages in the linked state, and the linked state. It is configured and arranged to adjust the linked state by adjusting the movement of the operating body that adjusts between the adjacent stages. According to the characteristic configuration of claim 1, the instrumental error matching is performed in a linked state between the connecting portion and the valve portion with respect to the rotating body of the link mechanism (hereinafter, may be referred to as a connecting portion-valve portion linked state). By adjusting in multiple stages, the opening / closing operation timing of the valve portion with respect to the rotation phase around the rotation axis of the rotating body of the connecting portion is adjusted in multiple stages. This can be performed by performing movement adjustment with a large operation amount as compared with an adjustment amount (hereinafter, sometimes referred to as an inter-stage adjustment amount) between adjacent stages in the coupling portion-valve portion linked state. In other words, by adjusting the movement of the operating body with a larger operation amount than the inter-step adjustment amount, adjustment between adjacent steps in the connection part-valve part linked state can be performed with a small inter-step adjustment amount. Therefore, it is possible to easily perform the adjustment between the adjacent stages in the coupling portion-valve portion linking state, and the adjustment can be performed with high accuracy, and it is easy to perform the instrumental error matching as desired. became. Therefore, it has become possible to properly perform instrumental error matching in a membrane gas meter by a simple operation.

[Invention of Claim 2] In the characteristic configuration of Claim 2, the instrumental error matching means adjusts the connecting position of the connecting portion with respect to the rotating body around the rotation axis in a plurality of stages. The operating state is adjusted in a plurality of stages by the above, and the operating body is supported by the rotating body with one end side being a swing center, and the other end side is a plurality of swinging positions at the rotating body. A swing adjusting body fixed to the swing adjusting body is provided, and the connecting portion is connected to the swing center side of the swing adjusting body. According to the characteristic configuration of claim 2, when the swing adjusting body is swung with one end side thereof as a swing center and the other end side is fixed at a predetermined position among a plurality of swing positions, The connecting portion connected to the swing center side of the swing adjuster swings, the connecting position of the connecting portion around the rotation axis with respect to the rotating body is adjusted, and the connection state between the connecting portion and the valve portion is adjusted. To be done. That is, the free end side of the swing adjuster is swung by an amount larger than the adjustment amount of the connecting position around the rotation axis of the connecting part with respect to the rotating body, so that the connecting part-valve part linked state is adjusted. can do. Moreover, since the swing adjuster is swingably supported with respect to the rotating body,
When adjusting the connection state between the connecting portion and the valve portion, the swing adjustment body is adjusted by swinging without adjusting the rotating body or the valve portion opening / closing operation linking mechanism that links the rotating body and the valve portion. Therefore, it is possible to more easily adjust the connection state between the connection portion and the valve portion. Therefore, the instrumental error matching can be performed by a simpler operation.

[Invention of Claim 3] According to the characteristic configuration of Claim 3, the gas to the metering chamber is accompanied by the rotation of the valve body in which the valve portion is rotated around the rotation axis. The valve unit opening / closing operation linkage mechanism is provided with a rotary shaft that rotates integrally with the rotary body around the rotary shaft center, and the rotary shaft rotates integrally with the valve body. The connection state is adjusted in a plurality of stages by adjusting the connection position of the connecting portion with respect to the rotating body around the rotation axis in a plurality of stages. As the operating body, the rotating body and the rotating shaft are formed as an integrated body, and the rotating shaft of the integrated body has a plurality of rotation phases around the rotating shaft center with respect to the valve body. Are configured so that they can be fitted together and are connected to the connecting portion. In a state in which the connecting portion corresponds to each of the rotation shafts when fitted to the valve body at a plurality of rotation phases, and in a state where the rotation phases around the rotation axis are different, It is provided in the rotating body. According to the characteristic configuration of claim 3, when the rotating body is rotationally operated by the link mechanism, the rotating shaft rotates integrally with the rotating body, and the valve body rotates integrally with the rotating shaft. The gas is supplied to and discharged from the measuring chamber with the rotation. When the rotary shaft of the rotary body and the integrated body is used as the operating body and is fitted to the valve body at different rotation phases around the rotation axis, the object to be connected to the connecting portion is connected in the rotation phase of the rotation shaft. Since the rotation phase around the rotation axis of the connecting portion is changed and adjusted before changing the rotation phase of the rotating shaft, when the connecting portion is connected to the connected portion at the rotating phase of the rotating shaft, the connecting portion The connection position around the rotation axis with respect to the rotating body is adjusted, and the connection portion-valve portion connection state is adjusted. That is, the rotation axis of the connected portion connected to the connection portion is adjusted by the movement adjustment by a large amount of operation in which the rotation axis of the rotating body and the integrated body are fitted to the valve body at different rotation phases around the rotation axis. By adjusting the rotational phase around the center with a small adjustment amount, it is possible to perform the adjustment between the adjacent stages in the coupling portion-valve portion linked state,
The adjustment can be easily performed, and the adjustment can be performed with high precision, so that the instrumental error matching can be easily performed as desired. Therefore, in the membrane gas meter configured to supply and discharge the gas to and from the measuring chamber in accordance with the rotation of the valve body whose valve portion is rotated around the rotation axis, the instrumental error matching can be easily performed. I can do it properly.

[Invention of Claim 4] According to the characterizing feature of Claim 4, the valve section rotates gas around the rotation axis, and the gas to the metering chamber The valve body is configured to perform the same supply and discharge, and to be in the same supply and discharge state when the valve body is rotated in a plurality of rotation phases at predetermined angles around the rotation axis, respectively. The part opening / closing operation linkage mechanism includes a rotating shaft that rotates integrally with the rotating body around the rotating shaft center, and the rotating shaft is connected to the valve body so as to rotate integrally with the rotating body. The aligning means adjusts the linked state by adjusting the rotation phase of the valve portion connected to the rotation shaft to the plurality of rotation phases, using the valve body as the operating body. Engages with a locking part that is provided so as to project radially outward from the rotary shaft. A plurality of engaged parts, in a state corresponding to each when the valve body is rotated to the plurality of rotation phases, and in a state in which the rotation phase around the rotation axis is different, It is provided on the outer peripheral portion of the valve body. According to the characteristic configuration of claim 4, when the rotating body is rotationally operated by the link mechanism, the rotating shaft rotates integrally with the rotating body, and the valve body rotates integrally with the rotating shaft. With the rotation, gas is supplied to and discharged from the measuring chamber, and when the valve body is rotated in a plurality of rotation phases at predetermined angles around the rotation axis, respectively, It is configured to be in the same supply / discharge state. When the valve body is used as the operating body and is rotated in different rotation phases at a predetermined angle around the rotation axis, while the supply / discharge state is the same as before the rotation phase of the valve body is changed, the rotation phase of the valve body is changed. The rotational phase around the rotation axis of the engaged portion to be engaged with the locking portion is changed and adjusted before the rotational phase of the valve element is changed. ,
When the engaged portion is engaged with the locking portion, the rotation phase of the valve portion connected to the rotation shaft is adjusted, and the connection portion-valve portion linked state is adjusted. In other words, the rotational phase of the valve section connected to the rotary shaft is adjusted with a small adjustment amount by the movement adjustment with a large operation amount that rotates the valve element around the rotational axis at different rotational phases at a predetermined angle. Since the adjustment can be performed between the adjacent stages in the connection portion-valve portion linkage state, the adjustment can be easily performed, and
The adjustment can be performed with high accuracy, and it becomes easier to perform the instrumental error matching as desired. Therefore, in the membrane gas meter configured to supply and discharge the gas to and from the measuring chamber in accordance with the rotation of the valve body whose valve portion is rotated around the rotation axis, the instrumental error matching can be easily performed. I can do it properly.

[Invention of Claim 5] According to the characterizing configuration of Claim 5, the plurality of engaged portions correspond to respective cases when the valve body is rotated in the plurality of rotation phases. , In a state in which a plurality of rows are arranged along the circumference of the rotation axis, and as a plurality of engaged portions to be arranged, correspond to a step other than an adjacent step among a plurality of steps for adjusting the linked state. The thing is that it is provided in the state where things are located. According to the characteristic configuration of claim 5, the plurality of engaged portions are arranged along the circumference of the rotation axis center in correspondence with the rotation of the valve body in the plurality of rotation phases. When provided in a state, as a plurality of engaged portions to be arranged, those provided corresponding to a step other than the adjacent step among the plurality of steps for adjusting the coupling portion-valve portion linkage state are provided. Therefore, it is possible to widen the space around the rotation axis of the adjacent engaged parts, and thus it is possible to increase the shape of the engaged parts to be provided. In other words, corresponding to each when rotating the valve body in a plurality of rotation phases,
Since the shapes of a plurality of engaged parts arranged side by side around the axis of rotation can be enlarged, the engaged parts can be easily manufactured, and the locking parts can be easily engaged with the engaged parts. Therefore, the work of the instrumental error matching becomes easier. Therefore, it has become possible to appropriately perform the instrumental error matching by a simpler work, while easily manufacturing the membrane gas meter.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A first embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 3, the membrane gas meter is constructed by assembling using a casing C having a gas supply port 1 and a gas discharge port 2, and the gas supply port 1 and the gas discharge port 2 allow the gas supply pipe to be connected. It is configured so that it is connected in the middle of (not shown), the flow rate of the gas flowing through the gas supply pipe is measured, and the gas flow rate is displayed by the counter 3.

As shown in FIG. 1, the membrane gas meter of the present invention comprises a valve section B for controlling the supply and discharge of gas to and from the measuring chamber 4, and a pair of membranes that reciprocate by the supply and discharge of gas to and from the measuring chamber 4. Part F, a link mechanism L operated by reciprocating motion of the pair of film parts F,
A rotating mechanism R including a rotating body Ra that is linked to the link mechanism L and is rotated by the reciprocating motion of the pair of film portions F, and a valve portion opening / closing operation that opens / closes the valve portion B with the rotation of the rotating body Ra. The operating mechanism O (see FIG. 7) and the unit-shaped weighing unit U in which the instrumental error matching means S is assembled in a unit are provided in a casing C.
A pressure sensor 6 for detecting the pressure of the supplied gas, a vibration sensor 7, a gas supply cutoff valve 8, and the detection information of the pressure sensor 6 and the detection information of the vibration sensor 7 which are assembled in the casing C. The controller 9 for shutting off the gas supply shutoff valve 8 is assembled, and the counter 3 is assembled outside the casing C.

As shown in FIGS. 6 to 8, in the instrumental error matching means S, the linking state between the linking pin 41 as the linking part for the rotating body Ra of the link mechanism L and the valve part B, that is, the linking part-valve. The opening / closing operation timing of the valve portion B with respect to the rotation phase of the connecting pin 41 around the rotation axis P of the rotating body Ra of the connecting pin 41 is adjusted in a plurality of stages by the adjustment of a plurality of stages. S is moved and adjusted by a large operation amount as compared with the adjustment amount between the adjacent stages in the coupling-valve linked state, so that the adjustment between the adjacent stages in the coupled-valve linked state is performed. The moving state of the operating body M is adjusted so as to adjust the connection state between the connecting portion and the valve portion.

The unit-shaped measuring unit U will be further described. As shown in FIGS. 6 to 8, the unit-shaped weighing unit U
Is manufactured by using the assembling base 10 to assemble a pair of the film part F, the link mechanism L, the rotating mechanism R, the valve part opening / closing operation mechanism O, the instrumental error matching means S and the valve part B into a unit. The assembling base 10 includes an upper wall portion 10a and a lower wall portion 10b that are opposed to each other in the vertical direction with a space therebetween, a partition wall portion 10c that connects the upper wall portion 10a and the lower wall portion 10b, and
A pair of membrane holding frame portions 10d are formed integrally on both sides of the partition wall portion 10c and are spaced apart from each other and connect the upper wall portion 10a and the lower wall portion 10b. By forming the measuring chambers 4 on both sides of each membrane holding frame portion 10d, a total of four measuring chambers 4 are formed (details will be described later), but as shown in FIG. 5, the upper wall portion 10a is also formed.
On the lower surface, four gas supply / discharge passages X, which communicate with the four measuring chambers 4 on the lower surface and open on the upper surface, and a gas discharge passage Y whose both ends open on the upper surface are formed. The upper openings of the four gas supply / exhaust passages X are arranged so as to be aligned in a ring shape with a phase shift of 90 °, and the openings on one end side of the gas exhaust passage Y are arranged in an annular shape. It is provided inside the upper surface opening of X (hereinafter sometimes referred to as an annular supply / discharge opening group), and the opening on the other end side is provided outside the annular supply / discharge opening group.

The film portion F is composed of a film body 11, a circular film plate 12 held in the center of each of both sides of the film body 11, and a hinge plate 13 held in the center of the outer film plate 12. Yes,
The membrane portion F is assembled to the assembling base portion 10 by sandwiching the peripheral portion of the membrane body 11 with the frame-shaped regulating film plate 14 at the peripheral portion of the hole of the membrane holding frame portion 10d.

The link mechanism L is composed of two sets of a large elbow metal 15 and a small elbow metal 16 whose ends are pivotally supported, and the ends of the two small elbow metals 16 are overlapped with each other. A connecting pin 41 as a connecting portion is rotatably supported on the portion.

The rotating mechanism R is a support base 1 which is mounted on the upper wall 10a of the assembly base 10 with two screws 36.
7, a rotary shaft 18 rotatably supported on the support base 17 about a vertical axis, and a disc 19 as a rotary body Ra connected to the upper end of the rotary shaft 18 so as to rotate integrally. Configured. The lower side of the rotary shaft 18 is formed into a regular octagonal connecting rod portion 18c that can be inserted into and removed from a regular octagonal connecting hole portion 5c of the rotary valve 5 described later.

The disc 19 has a connecting rod portion 1 of the rotary shaft 18.
8c, with the connecting pin 41 being in correspondence with each side.
Is formed with eight fitting connection holes 19h that can be inserted and removed freely. The formation position of the eight fitting connection holes 19h will be described. As shown in FIG. 9, in plan view, 8
The individual fitting connection holes 19h are, for example, reference radii r passing through the rotation axis P of the rotation shaft 18 and orthogonal to the side of the connection rod-shaped portion 19c.
Rotation axis 1 with the central angle to be different for each side
It is formed so that it may be located on the same circumference centering on the rotation axis P of 8. Specifically, one fitting connection hole 19h
Is formed at a position where the reference radius Ra overlaps (circumferential angle is 0 °), the other seven fitting connection holes 19h are at positions where the circumferential angle increases by 1 °, that is, the circumferential angle is 1 °. 2 °, 3 °,
Formed at 4 °, 5 °, 6 ° and 7 ° positions.

A worm 20 is provided at an intermediate portion of the rotary shaft 18, and a worm wheel 21 is rotatably supported by a support stand 17 in a state of being meshed with the worm 20 so as to rotate about a horizontal axis, At the tip of the wheel 21,
A columnar permanent magnet 22 for driving an operation shaft (not shown) provided in the counter 3 is attached.

The rotary valve 5 as a valve body is rotatably supported around a vertical axis by a support shaft 37 that is erected at the center of the annular supply / discharge opening group of the upper wall 10a of the assembly base 10. I am doing it. The rotary valve 5 is formed with gas supply holes 5a vertically overlapping the upper openings of the four gas supply / exhaust passages X in accordance with the rotation, and the rear surface of the rotary valve 5 is supplied with gas. Gas supply / exhaust path X where holes 5a overlap
The upper surface opening of the gas supply / exhaust path X facing the upper surface opening and the recess 5b for communicating the opening in the annular supply / exhaust opening group in the gas exhaust path Y are formed. Further, the rotary valve 5 has a regular octagonal connecting rod portion 1 of the rotary shaft 18.
A regular octagonal connecting hole portion 5c is provided so that 9c can be inserted and removed.

One end of a wing 24 is pivotally supported on each hinge board 13 of each film portion F, and the other end of the wing 24 is assembled with the wing shaft 25 with its axial center oriented in the up-down direction. The holes are formed in the upper wall portion 10a of the attachment base portion 10 in an airtight manner and are connected to each other.

One end of each large elbow 15 is pivotally supported on the upper end of each wing shaft 25, and a connecting pin 41 pivotally supported on the overlapping portion of the ends of the two small elbows 16 is attached to the disk 19 of the disk 19. The link mechanism L and the rotating mechanism R are connected to each other by fitting into one of the fitting connecting holes 19h, and the connecting rod portion 18c at the lower end of the rotating shaft 18 is connected to the connecting hole portion 5c of the rotary valve 5. By inserting, the rotary mechanism R and the rotary valve 5 are connected, each wing shaft 25 is rotated at a predetermined angle by the reciprocating motion of each film portion F, and the rotary shaft is rotated by the link mechanism L by the rotation. 18 is rotated and the rotary valve 5 is rotated to control gas supply / discharge to / from the four measuring chambers 4. Therefore, the valve section B
Is equipped with a rotary valve 5, four gas supply / exhaust passages X and a gas exhaust passage Y, and with the rotation of the rotary valve 5 which is rotationally operated around the rotation axis P, is fed to the four measuring chambers 4. The valve operating linkage mechanism O is configured to supply and discharge gas, and includes a rotary shaft 18 that rotates integrally with the disc 19 around the rotary shaft center P, and the rotary shaft 18 is disposed on the lower side. The rotary rod 5 is integrally connected to the rotary valve 5 by a connecting rod portion 18c.

Next, with reference to FIG. 7, a procedure for matching the instrument difference by the instrument difference matching means S will be described. When the state in which the membrane portion F and the valve portion B are linked to each other is in a predetermined state (for example, a state in which any one of the membrane portions F is located at the dead center position), the connecting pin 41 is fitted into the fitting connecting hole of the disc 19. 19h, the screw 36 is removed, the rotary shaft 18 is pulled out from the connecting hole portion 5c of the rotary valve 5, and the fitting connecting hole 19h corresponding to the instrumental error matching amount is connected to the connecting pin 41. In the state where the rotary valve 5 is rotated so as to be positioned at, the connecting pin 41 is inserted into the connecting hole portion 5c of the rotary valve 5, the fitting connecting hole 19h of the disc 19 is fitted, and the screw 36 is tightened.
Then, the connecting position of the connecting pin 41 with respect to the disc 19 around the rotation axis P is changed and adjusted, and the connecting portion-valve portion linked state is adjusted.

That is, the adjustment amount at the adjacent stage in the coupling portion-valve portion coupling state corresponds to the coupling position of the coupling pin 41 with respect to the disk 19 around the rotation axis P at the central angle of 1 °.
In this way, shifting the connecting position of the connecting pin 41 with respect to the disc 19 around the rotation axis P by 1 ° at the central angle can be achieved by rotating the rotating shaft 18 by 45 °.

As described above, in the first embodiment, the instrumental error matching means S is connected by adjusting the connecting position of the connecting pin 41 with respect to the disc 19 around the rotation axis P in multiple stages. In order to adjust the part-valve part linked state in a plurality of stages, a disk 19 and a rotary shaft 18 are integrally formed as an operating body M, and the rotary shaft 18 of the integrated body is provided with respect to the rotary valve 5. And a plurality of fitting connection holes 19h serving as a plurality of connected portions that are connected to the connecting pin 41 and are configured to be fitted in a plurality of rotation phases around the rotation axis P.
8 are provided on the disc 19 in a state corresponding to each of the cases where the rotary valve 5 is fitted to the rotary valve 5 in a plurality of rotation phases, and in a state in which the rotation phases around the rotation axis P are different. is there.

That is, the rotary shaft 18 integrally formed with the disk 19 is used as the operating body M, and the movement amount by the rotation of the operating body M is adjusted to adjust the adjustment amount between the adjacent stages in the coupling portion-valve portion linked state. It is possible to adjust the connection state between the connection portion and the valve portion with a relatively large amount of operation.

Although not shown in the drawing, the disc 19 is provided with a fitting connection hole 19h corresponding to each fitting connection hole 19h.
The information corresponding to the adjustment amount of the connection portion-valve portion cooperation state according to is displayed.

Based on FIGS. 1 to 4, casing C
Will be added. The casing C includes a bottomed tubular casing main body 26 and a bottomed tubular casing closing portion 27 in which openings are fitted to each other, and a casing closing portion 2.
A lid portion 28 for closing the component loading opening portion 27g on the rear surface side of No. 7
It is configured with and. In the casing closing portion 27,
A gas supply port 1 and a gas discharge port 2 are provided, and a gas discharge pipe portion 33 is provided inside the casing closing portion 27 in a state of being connected to the gas discharge port 2. The gas discharge pipe portion 33 is attached to the casing main body 26 and the casing closing portion 27 to form the casing C, and is formed in the opening portion of the gas discharge passage Y of the unit-shaped measuring portion assembled in the casing C. It is designed to communicate.

The end of the casing body 26 on the opening side is formed as an enlarged diameter portion 26a having a larger diameter toward the opening side. The casing closing portion 27 has a large-diameter portion 27a on the opening side and a small-diameter portion 27b having a smaller diameter than the large-diameter portion 27a on the bottom side, and a larger diameter is provided between the large-diameter portion 27a and the small-diameter portion 27b on the opening side. The enlarged diameter portion 27c is formed. In addition, a concave portion 27d for mounting the counter 3 and a hole 27 for projecting a return shaft cap 31 of the supply cutoff valve unit V, which will be described later, are formed on the front surface of the casing closing portion 27.
In addition to forming e, a see-through window 27f through which the light of the abnormality notification lamp 29 described later can pass is provided.

As shown in FIGS. 1 and 4, the controller 9 is provided with an abnormality notification lamp 29 and a terminal portion 9a for inserting into a connector (not shown) provided in the casing closing portion 7. The controller 9 shuts off the gas supply shutoff valve 8 when the pressure sensor 6 detects an abnormal pressure or when the seismoscope 7 detects an earthquake, and lights up the abnormality notification lamp 29 to notify the abnormality. It is configured to do.

As shown in FIGS. 1 and 4, using the tubular body 30, a gas supply cutoff valve 8, a return shaft (not shown) for canceling the cutoff state of the gas supply cutoff valve 8, and A detachable return shaft cap 31 that covers the operation portion of the return shaft
Are integrally assembled to form a supply cutoff valve unit V.

Next, the procedure for assembling the membrane gas meter will be described. The unitary metering unit U manufactured as described above is assembled in the casing for flow rate measurement performance inspection, and the flow rate measurement performance inspection is performed. The casing for the flow rate measurement performance inspection defines, for example, the unit-shaped measuring unit U to partition the measuring chamber 4, supplies gas through the gas supply hole 5a of the rotary valve 5, and supplies gas through the gas discharge passage Y. Is configured to be discharged. Then, as shown in FIG. 1, an upper wall portion 10 of the unit-shaped weighing unit U, which has a predetermined flow rate measuring performance, is provided.
a, the lower wall portion 10b, the partition wall portion 10c, and the membrane holding frame portion 10d are assembled in the casing body 26 with a seal member (not shown) interposed therebetween. Then, as shown in FIG. 5, the side peripheral portion of the unit-shaped weighing portion U is surrounded by the casing body 26, and the upper wall portion 10a, the lower wall portion 10b, and the partition wall are provided on both sides of each membrane portion F, respectively. Part 1
0c, the membrane holding frame portion 10d, and the casing body 26 to define the weighing chamber 4. That is, four measuring chambers 4 are formed.

When an annular seal member 32 is provided around the casing main body 26 and the opening of the casing main body 26 is inserted into the opening of the casing closing portion 27, a jack or the like is used to press-fit it. As shown in FIG. 5, the expanded diameter portion 26a of the casing main body 26 and the expanded diameter portion 27c of the casing closing portion 27 are fitted to each other to be assembled as the casing C, and a seal is provided between the casing main body 26 and the casing closing portion 27. The inner space of the casing C is hermetically sealed by being sealed with the member 32.
Further, the gas discharge pipe portion 33 in the casing closing portion 27 is communicated with the gas discharge hole passage X of the unit-shaped measuring portion assembled in the casing C.

When the counter 3 is attached to the recess 27d of the casing closing portion 27, the end face of the operating shaft (not shown) of the counter 3 faces the permanent magnet 22 through the wall portion of the casing closing portion 27. When the permanent magnet 22 rotates as the rotating mechanism R rotates,
In conjunction with this, the operation shaft is rotated by the magnetic force of the permanent magnet 22 and the counter 3 is driven.

As shown in FIGS. 1, 2 and 4, the controller 9 is loaded through the component loading opening 27g of the casing closing portion 27, and its terminal portion 9a is connected to the connector (in the casing closing portion 7). When the controller 9 is assembled at a predetermined location in the casing closing portion 27 by inserting the controller 9 into the casing closing portion 27, the abnormality notification lamp 29
It comes to be located inside the see-through window 27f, so that the off state and the turn-on state of the abnormality notification lamp 29 can be visually recognized through the see-through window 27f. Supply shutoff valve unit V
Is from the component charging opening 27g to the casing closing portion 27.
The return shaft cap 31 is inserted into the hole 27e in an airtight manner, and is attached to a predetermined support portion (not shown) provided in the casing closing portion 27 in advance. Further, the pressure sensor 6 and the vibration sensor 7 are also loaded into the casing closing portion 27 through the component loading opening portion 27g and supported by a predetermined support portion (not shown) provided in the casing closing portion 27 in advance. To do. Then, the component loading opening 27g of the casing closing portion 27 is closed by the lid portion 28 via the inner lid 34.

Inspection and repair of the membrane gas meter are carried out by using a jack or the like to pull out the casing closing portion 27 from the casing main body 26 and separating the casing main body 26 and the casing closing portion 27. When the inspection and repair are completed,
Again, as described above, the casing body 26 and the casing closing portion 27 are assembled by press-fitting with a jack or the like.

The gas meter constructed as described above is connected to the middle of a gas supply pipe (not shown) by the gas supply port 1 and the gas discharge port 2. Then, when the gas is supplied from the gas supply port 1, the supplied gas is supplied through the gas supply hole 5a of the rotary valve 5 to any one of the four measuring chambers 4 in the gas supply / discharge passage. While being introduced through X, the pressure of the introduced gas moves the film portion F, so that the gas in the measuring chamber 4 on the opposite side of the film portion F is supplied to the gas supply / exhaust passage X, the gas exhaust passage Y, and the gas exhaust pipe. The gas is discharged from the gas discharge port 2 via the portion 33, the rotary mechanism R is rotated by the link mechanism L by the movement of the film portion F, the rotary valve 5 is rotated, and the rotary valve 5 rotates. The introduction of gas into the four measuring chambers 4 and the discharge of gas from the four measuring chambers 4 are controlled, and the rotation of the rotating mechanism R causes the permanent magnet 22 to rotate, which causes the operating shaft to rotate. Counter 3 is driven, gas flow rate It is displayed.

When the pressure sensor 6 detects an abnormal pressure or the seismoscope 7 detects an earthquake, the controller 9 shuts off the gas supply shutoff valve 8 to shut off the gas supply to the membrane gas meter. At the same time, the abnormality notification lamp 29 is turned on. The cutoff of the gas supply cutoff valve 8 can be released by removing the return shaft cap 31 of the supply cutoff valve unit V and pushing the return shaft.

Hereinafter, the second and third embodiments of the present invention will be described. The same reference numerals are given to the same constituent elements or constituent elements having the same operation as those of the first embodiment in order to avoid redundant description. The description will be omitted by attaching the components, and the configuration different from that of the first embodiment will be mainly described.

[Second Embodiment] The second embodiment will be described with reference to FIGS. In the second embodiment, the first embodiment is different from the first embodiment except that the configuration of the unit-shaped weighing unit U is different.
The configuration is similar to that of the embodiment. In the unit-shaped weighing unit U, in the second embodiment, the configuration of each of the pair of film units F and the link mechanism L, and the pair of film units F and the link mechanism L.
The connection configuration with is the same as that of the first embodiment, but the configurations of the rotary mechanism R, the rotary valve 5, and the instrumental error matching means S are different from those of the first embodiment.

The rotating mechanism R will be described with reference to FIG.
As shown in FIGS. 0 and 11, the rotation mechanism R includes a support base 17 that is mounted on the upper wall portion 10a of the assembly base portion 10 with two screws 36, and the support base 17 around the vertical axis. Rotating shaft 18 rotatably supported and its rotating shaft 1
8 includes a connecting arm 38 as a rotating body Ra that projects radially outward from the upper end of 8, and a locking arm 39 as a locking portion that projects radially outward from the lower end of the rotating shaft 18. is there. As in the first embodiment, the worm 20 is provided in the middle of the rotary shaft 18, and the worm wheel 21 is rotated by the support base 17 while being meshed with the worm 20 so as to rotate around the horizontal axis. A columnar permanent magnet 22 that freely supports and drives an operation shaft (not shown) provided in the counter 3 is attached to the tip of the worm wheel 21.

Similar to the first embodiment, the rotary valve 5 has a support shaft 37 standing upright in the center of the annular supply / discharge opening group of the upper wall portion 10a of the assembling base portion 10 around the vertical axis. Although it is rotatably supported and the gas supply hole 5a and the recessed portion 5b are formed as in the first embodiment, the connecting hole portion 5c in the first embodiment is omitted and the rotation shaft 18 is locked. Six groove portions 5d as a plurality of engaged portions for engaging the arms 38 are formed side by side in the circumferential direction.

That is, the connecting pin 41 is connected to the connecting arm 38, the link mechanism L and the rotating mechanism R are connected, and the locking arm 39 is engaged with the groove portion 5d of the rotary valve 5, whereby the rotating mechanism R is rotated. And the rotary valve 5 are connected to each other, and the blade shafts 25 are rotated at a predetermined angle by the reciprocating motion of each film part F, and the rotary shaft 18 is rotated by the link mechanism L along with the rotation, and the rotary shaft 18 is rotated. The valve 5 is rotated to control the supply and discharge of gas to and from the four measuring chambers 4.

Therefore, the valve portion B includes the rotary valve 5,
The gas supply / discharge path X and the gas discharge path Y are provided, and the gas is supplied / discharged to / from the four measuring chambers 4 in accordance with the rotation of the rotary valve 5 which is rotated around the rotation axis P. The rotary valve 5 is configured so as to have the same supply / discharge state when the rotary valve 5 is rotated in a plurality of rotation phases at 90 ° intervals. Further, the valve portion operating linkage mechanism O includes a rotary shaft 18 which rotates integrally with the connecting arm 38 around the rotary shaft center P, and the rotary shaft 18 is integrated with the rotary valve 5 by a lower locking arm 39. It is configured to be connected so as to rotate.

By the way, the same supply / discharge condition means that the gas supply hole 5a is overlapped with the upper opening of any one of the four gas supply / discharge passages X and the gas supply hole 5a is overlapped. A state in which the upper surface opening of the gas supply / discharge path X facing the upper surface opening of the path X and the opening in the annular supply / discharge opening group in the gas discharge path Y communicate with each other in the recess 5b, in other words,
One of the four measuring chambers 4 is in the gas supply state, and the one chamber adjacent to it through the membrane portion F is in the gas discharge state.

Next, the installation positions of the six grooves 5d in the rotary valve 5 will be described. As shown in FIG. 12, in the rotary valve 5, two groove portions 5d are respectively provided with center angles with respect to the reference radius r corresponding to the respective three reference radii r that are deviated by 90 ° about the rotation axis P. Are provided in different states. By the way, a position corresponding to the first reference radius r and overlapping with the reference radius r,
Also, the groove 5d is formed at each of the positions shifted by 3 ° with respect to the reference radius r, and the position shifted by 1 ° with respect to the reference radius r by 1 ° in correspondence with the second reference radius r. And groove portions 5d are formed at positions shifted by 4 °, and the center angle is 2 with respect to the reference radius r in correspondence with the third reference radius r.
Grooves 5d are provided at the positions shifted by 5 ° and the positions shifted by 5 °.
Has been formed.

Next, based on FIG. 11, the instrumental error matching means S
A procedure for matching instrumental differences will be described. Membrane part F
When the membrane portion-valve portion linking state between the valve portion B and the valve portion B is in a predetermined state (for example, a state in which one of the membrane portions F is located at the dead center position), the screw 36 is removed and the locking arm 39. Is removed from the groove portion 5d of the rotary valve 5, and then the rotary valve 5 is rotated so that the groove portion 5d corresponding to the instrumental error matching amount is located at the connection position with the locking arm 39. Insert the locking arm 39 into the corresponding groove 5d and tighten the screw 36. Then, the connection position of the rotary valve 5 with respect to the locking arm 39 around the rotation axis P is adjusted, and the connection portion-valve portion linkage state is adjusted.

That is, the adjustment amount at the adjacent stage in the coupling portion-valve portion coupling state corresponds to the amount by which the rotational phase of the rotary valve 5 coupled to the rotary shaft 18 is shifted by 1 °.
In this way, shifting the rotational phase of the rotary valve 5 connected to the rotary shaft 18 by 1 ° is performed by the connecting pin 41.
The rotation of the rotary valve 5 by 90 ° can be achieved by shifting the connecting position of the disk 19 around the rotation axis P about the central angle by 1 °.

As described above, in the second embodiment, the instrumental error matching means S uses the rotary valve 5 as the operating body M and sets the rotational phase of the valve portion B connected to the rotary shaft 18 to a plurality of rotational phases. By adjusting the rotation phase, the connecting part-
A plurality of groove portions 5d are provided for adjusting the valve portion linking state, and a plurality of engaged portions with which a locking arm 39 as a locking portion provided so as to project radially outward from the rotary shaft 18 is engaged.
In the state corresponding to each of the rotary valves 5 rotated in the plurality of rotation phases, and the rotation axis P
It is provided on the outer peripheral portion of the rotary valve 5 in a state in which the rotational phase around it is different. That is, the rotary valve 5 is used as the operating body M, and by adjusting the rotational phase of the operating body M, the connecting portion is operated with a larger operation amount than the adjustment amount between the adjacent stages in the connecting portion-valve portion linked state. -The valve linkage can be adjusted.

Further, the plurality of groove portions 5d are arranged in a state in which a plurality of groove portions 5d are arranged along the circumference of the rotation axis P in correspondence with the rotary valve 5 being rotated in the plurality of rotation phases, respectively, and The plurality of groove portions 5d to be arranged are provided in a state in which among the plurality of stages for adjusting the coupling portion-valve portion linked state, those corresponding to stages other than the adjacent stages are positioned.

Although illustration is omitted, the rotary valve 5 displays information corresponding to each groove 5d and the adjustment amount of the connecting portion-valve portion linked state by the groove 5d.

[Third Embodiment] A third embodiment will be described with reference to FIGS. 13 to 17. In the third embodiment, except that the configuration of the unit-shaped weighing section U is different, the first
The configuration is similar to that of the embodiment. In the unit-shaped weighing unit U, in the third embodiment, the configuration of each of the pair of film units F and the link mechanism L, and the pair of film units F and the link mechanism L.
The connection configuration with is similar to that of the first embodiment, but a crank mechanism K is provided instead of the rotating mechanism R, and four gas supply / exhaust passages X and gas exhaust passages X in the upper wall portion 10a of the assembly base portion 10 are provided. The arrangement configuration of the path Y, the configuration of each of the valve portion B and the device difference matching means S are different from those of the first embodiment.

The crank mechanism K will be described with reference to FIGS. 13 to 15. The crank mechanism K includes a crank base 43 to be mounted on the upper wall portion 10a of the mounting base 10 and a vertical direction of the crank base 43. The crankshaft 44 is rotatably supported around the axis of the crankshaft, and the crank arm 45 is provided to project radially outward from the upper end of the crankshaft 44. As in the first embodiment, the worm 20 is provided in the middle of the crank rotation shaft 44, and the worm wheel 21 is meshed with the worm 20 so as to rotate about the horizontal axis.
A worm wheel 21 is rotatably supported by a cylindrical permanent magnet 22 that drives an operation shaft (not shown) provided in the counter 3.

As shown in FIGS. 13 to 15, the film portion F
The upper surface openings of the two gas supply / exhaust passages X corresponding to the two measurement chambers 4 facing each other through the gas are arranged side by side with a space therebetween, so that the two gas supply / exhaust passage upper surface openings are lined up. Two sets of supply / discharge passage upper surface openings are provided, and the gas discharge passage Y has an opening on one end side that opens at two locations corresponding to each gas supply / discharge passage upper surface opening set and an opening portion on the other end side. Are formed so as to open at one place. In other words, 2 on both sides of the opening of the gas discharge path Y
Two rows of supply / discharge opening sections are formed in which gas supply / discharge passage upper surface openings are arranged.

At the top of each supply / discharge opening row, the swing valve 4 is provided.
6 is supported by a vertical shaft portion 47 so as to be swingable in the opening arrangement direction of the supply / discharge opening row. Swing valve 4
A communication recess (not shown) is provided on the rear surface of the rocking valve 6. When the rocking valve 46 is positioned at each rocking end, the gas supply / discharge passage upper surface opening on the rocking end side has the communication recess. The gas supply / exhaust passage upper surface opening on the side opposite to the swing end is opened, and the two gas supply / discharge passage upper surface openings are closed in a state of being located at the center in the swing direction. is there.

As shown in FIGS. 13 to 16, a connecting plate 48 having a shaft portion 48a whose axial center is oriented in the vertical direction is rotatably supported on the crank arm 45 by the shaft portion 48a as a rotating body Ra. And the connecting plate 48 of the link mechanism L
The link mechanism L and the crank mechanism K are connected by connecting a connecting bearing hole 50 as a connecting portion for (corresponding to the rotating body Ra) to a position eccentric from the shaft portion 48a in the connecting plate 48. , The two crank rods 49 connected to the crank arm 45 are connected to the rocking valves 46, and the reciprocating motion of each film part F causes each blade shaft 25 to rotate at a predetermined angle. The link mechanism L causes the connecting plate 48 and the crank arm 45 to move to the crank rotation axis P.
The swing valve 46 is swung around to swing and control the supply and discharge of gas to and from the four measuring chambers 4.

Therefore, the valve portion B includes two swing valves 4
Provided with 6 and 4 gas supply / exhaust paths X and Y, and 2
By swinging each swing valve 46, each of the four measuring chambers 4
It is configured to supply and discharge gas to and from. Further, the valve portion operating linkage mechanism O includes a crank arm 45 that rotates around the crank rotation axis P and two crank rods 49 that are connected to the crank arm 45.

Next, based on FIG. 17, four weighing chambers 4
A description will be given of the gas supply / discharge control for the gas. 4
Although the individual weighing chambers 4 perform the same functions, respectively, in order to make the description easy to understand, in FIG. 7, they are described as 4a, 4b, 4c, and 4d from the left side to the right side. From the left side to the right side of the gas supply / discharge path X, X1, X2, X
It is described as 3, X4. The swing valve 48 is described as 48a on the left side and 48b on the right side. In FIG. 17B, the left swing valve 48a stops moving,
The swing valve 48b on the right side opens the gas supply / exhaust path X4, and the gas supply / exhaust path X3 communicates with the gas exhaust path Y. Therefore, the pressure of the gas entering the measuring chamber 4d causes the film portion F to move to the measuring chamber 4c side. Since the gas is pushed, the gas in the measuring chamber 4c is discharged through the gas discharge passage Y. The movement of the film F causes the crank mechanism K to move.
Rotates, the swing valve 48a on the left moves to the right, the gas supply / exhaust path X1 opens, gas begins to flow into the measuring chamber 4a, and the gas filled in the measuring chamber 4b begins to be discharged (see FIG. (See (b) of 17). By the movement of the film portion F at this time, the swing valve 48b on the right side operates to move to the right side, the gas supply / discharge passage X3 opens, and gas begins to flow into the measuring chamber 4c. , The gas filled in the measuring chamber 4d begins to be discharged (see (c) of FIG. 17), and thereafter, (d) of FIG.
It is continuously repeated in the order of (a), (b), and (c).

Next, based on FIGS. 14 to 16, a description will be given of the connection structure of the link mechanism L and the crank mechanism K. Reference numeral 51 denotes a swing adjuster, and the swing adjuster 5
1, the fulcrum pin 51 facing downward is located at one end side.
The fixing pin 5 that is provided with f and is located on the other end side and faces downward.
1s, and is located at a position close to the fulcrum pin 51f between the fulcrum pin 51f and the fixing pin 51s,
The linking mechanism L is provided with an upward shaft portion 51a into which the coupling bearing hole 50 can be inserted and removed. The connecting plate 48 has a shaft portion 5
A long hole-like fulcrum hole 48f into which the fulcrum pin 51f is inserted in a state in which 1a is positioned at a connecting position with the connecting bearing hole 50 of the link mechanism L, and oscillates around the fulcrum hole 48f. A plurality of fixing holes 48s are formed along the movement locus of the fixing pin 51s when the fixing pin 51s is moved.

Then, the swing adjuster 51 is attached to the fulcrum pin 5
1f is inserted into the fulcrum hole 48f, the fixing pin 51s is provided in a state of being inserted into the predetermined fixing hole 48s, and the linking bearing hole 50 of the link mechanism L is inserted and fitted into the shaft portion 51a. The mechanism L is connected to the crank arm 45.

Next, the formation positions of the plurality of fixing holes 48s in the swing adjusting body 51 will be described. A position corresponding to a position where the coupling bearing hole 50 of the link mechanism L is coupled to the coupling plate 48 is a link coupling corresponding position. Figure 1
As shown in FIG. 6, in plan view, the crank rotation axis P
If the angle θ formed by the line segment connecting the shaft center of the shaft portion 48a of the connecting plate 48 and the line connecting the crank rotation axis P and the link connection corresponding position is the forward angle, the link connection corresponding position is obtained. , For example, the forward angle θ is 88 °, 89 °, 90 °,
It is set at 7 positions of 91 °, 92 °, 93 °, and 94 °. Then, when the swing adjusting body 51 is swung by inserting the fulcrum pin 51f into the fulcrum hole 48f and swinging the fulcrum pin 51f, the fixing pin 51s when the shaft portion 51a overlaps each link connection corresponding position.
The fixing holes 48s are formed so as to correspond to the respective positions.

Next, based on FIG. 15, the device difference matching means S
A procedure for matching instrumental differences will be described. Membrane part F
When the membrane portion-valve portion linking state between the valve portion B and the valve portion B is in a predetermined state (for example, a state in which any one of the membrane portions F is located at the dead center position), the fixing pin 51s of the swing adjusting body 51. Is pulled out from the fixing hole 48s of the connecting plate 48, and the swing adjusting body 51 is swung about the fulcrum pin 48f as a fulcrum to fix the fixing pin 5
1s is inserted into the fixing hole 48s corresponding to the instrumental error matching amount. Then, the connecting position of the connecting bearing hole 50 with respect to the connecting plate 48 around the crank rotation axis P is adjusted, and the connecting portion-valve portion linked state is adjusted.

That is, an operation that is larger than the adjustment amount in the adjacent stage in the coupling portion-valve portion coupling state, that is, the adjustment amount of the coupling position of the coupling bearing hole 50 with respect to the coupling plate 48 around the crank rotation axis P. Depending on the amount, the pin 5 for fixing the swing adjusting body 51
It is possible to adjust the connecting portion-valve portion linkage state by moving and adjusting the 1s side end portion.

As described above, in the third embodiment,
The instrumental error matching means S adjusts the connecting position of the connecting bearing hole 50 (corresponding to the connecting portion) with respect to the connecting plate 48 (corresponding to the rotating body Ra) around the crank rotation axis P in multiple stages. The operating state of the operating body M is supported by the connecting plate 48 with one end side being the swing center, and the other end side is a connecting plate at a plurality of swing positions. A swing adjusting body 51 fixed to the shaft 48 is provided, and a connecting bearing hole 50 of the link mechanism L is connected to a shaft portion 51a on the swing center side of the swing adjusting body 51.

In other words, the swing adjusting body 51 is used as the operating body M, and the swinging of the operating body M causes a large amount of operation as compared with the amount of adjustment between the adjacent stages in the linked portion-valve portion linked state. It is possible to adjust the connection state between the connection portion and the valve portion.

Although not shown, the connecting plate 48 has
The fixing holes 48s are made to correspond to the respective fixing holes 48s.
Information corresponding to the adjustment amount of the connection portion-valve portion cooperation state by s is displayed.

Another Embodiment Next, another embodiment will be described. (A) The instrumental error matching means S using the swing adjusting body 51 as exemplified in the third embodiment as the operating body M is
A membrane gas meter configured to supply and discharge gas to and from the metering chamber 4 in accordance with the rotation of the rotary valve 5 in which the valve portion B is rotated around the rotation axis P (for example, the above-described first embodiment or It can also be applied to the second embodiment). In this case, the rotary valve 5 and the rotary shaft 18 are configured to be connected in a fixed relative positional relationship around the rotary shaft center P, and the connecting plate 48 is fixedly provided on the upper end of the rotary shaft 18, and the connection is made. A swing adjuster 51 is provided on the plate 48 in a swingable state by its fulcrum pin 48f.

(B) In the third embodiment, instead of the swing valve 46 which is swingable around the vertical shaft portion 47, a parallel valve which is linked to the crank mechanism K so as to linearly reciprocate. A valve may be provided.

(C) The adjustment amount at the adjacent stage in the coupling portion-valve portion linking state may be smaller or larger than the amount exemplified in each of the above embodiments. Also, the connecting part-
The number of stages for adjusting the valve portion linked state to a plurality may be smaller or larger than the number of stages illustrated in each of the above embodiments.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a membrane gas meter according to a first embodiment.

FIG. 2 is a perspective view of the membrane gas meter according to the first embodiment seen from an oblique rear side.

FIG. 3 is a perspective view of the membrane gas meter according to the first embodiment seen from an oblique front side.

FIG. 4 is a partially cutaway perspective view of the membrane gas meter according to the first embodiment as seen from an oblique front side.

FIG. 5 is a vertical cross-sectional view of a main part of the membrane gas meter according to the first embodiment.

FIG. 6 is a perspective view of a unit-shaped measuring portion of the membrane gas meter according to the first embodiment.

FIG. 7 is an exploded perspective view showing an instrumental error matching means of the membrane gas meter according to the first embodiment.

FIG. 8 is a plan view of a unit-shaped measuring portion of the membrane gas meter according to the first embodiment.

FIG. 9 is a plan view of a disk of the membrane gas meter according to the first embodiment.

FIG. 10 is a perspective view of a unit-shaped measuring unit of the membrane gas meter according to the second embodiment.

FIG. 11 is an exploded perspective view showing an instrumental error matching means of the membrane gas meter according to the second embodiment.

FIG. 12 is a plan view of a valve body of the membrane gas meter according to the second embodiment.

FIG. 13 is a perspective view of a unit-shaped measuring portion of the membrane gas meter according to the third embodiment.

FIG. 14 is a plan view of a unit-shaped measuring unit of the membrane gas meter according to the third embodiment.

FIG. 15 is an exploded perspective view showing an instrumental error matching means of the membrane gas meter according to the third embodiment.

FIG. 16 is a plan view of a connecting plate of the membrane gas meter according to the third embodiment.

FIG. 17 is a view for explaining gas supply / discharge control for the measuring chamber of the membrane gas meter according to the third embodiment.

FIG. 18 is a plan view of a main portion for explaining a device difference matching configuration in a conventional membrane gas meter.

FIG. 19 is a vertical cross-sectional view of a main part for explaining a device difference matching configuration in a conventional membrane gas meter.

[Explanation of symbols]

4 weighing room 5 valve body 5d Engagement part 18 rotation axis 19h Connected part 39 Locking part 41,50 Connection 51 Swing adjustment body B valve F membrane part L-link mechanism M operation body O Coupling mechanism for valve opening / closing operation P axis of rotation Ra rotating body S device difference matching means

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroshi Matsushita             4-1-2 Hirano-cho, Chuo-ku, Osaka-shi, Osaka Prefecture               Within Osaka Gas Co., Ltd. (72) Inventor Atsuko Kadowaki             4-1-2 Hirano-cho, Chuo-ku, Osaka-shi, Osaka Prefecture               Within Osaka Gas Co., Ltd. F term (reference) 2F030 CC13 CD03 CE14 CH03

Claims (5)

[Claims] 1. A valve unit for controlling supply and discharge of gas to and from a measuring chamber,
The film unit is reciprocally moved by supplying and discharging the gas to and from the measuring chamber, and the rotating member is linked to the film unit by a link mechanism and is rotated by the reciprocating motion of the film unit. A membrane gas meter provided with a valve part opening / closing operation linking mechanism for opening / closing the valve part according to rotation of a body, wherein the linking part of the link part of the link mechanism with respect to the rotating body and the valve part By the adjustment of a plurality of stages, the instrumental error matching means for adjusting the opening / closing operation timing of the valve portion with respect to the rotation phase around the rotation axis of the rotating body of the connecting portion in a plurality of stages is provided in the adjacent stages in the linked state. The movement state is adjusted by a large operation amount as compared with the adjustment amount between the steps, and the movement state of the operating body that adjusts between the adjacent stages in the linkage state is adjusted to adjust the linkage state. Membrane-type gas meter provided. 2. The instrumental error matching means adjusts the linking state to a plurality of stages by adjusting a connecting position of the connecting portion with respect to the rotating body around the rotation axis in a plurality of stages. As the operating body, there is provided a swing adjusting body which is supported by the rotating body with one end side being a swing center and whose other end side is fixed to the rotating body at a plurality of swing positions. The membrane gas meter according to claim 1, wherein the connecting portion is connected to the center of the swing of the motion adjusting body. 3. The valve part is configured to supply and discharge gas to and from the metering chamber in accordance with rotation of a valve element that is rotationally operated around the rotation axis. The linkage mechanism includes a rotary shaft that rotates integrally with the rotary body around the rotary shaft center, and the rotary shaft is connected to the valve body so as to rotate integrally with the valve body. By adjusting the connecting position of the connecting portion with respect to the rotating body around the rotation axis in multiple stages, the linked state is adjusted in multiple stages.
As the operating body, the rotary body and the rotary shaft are formed as an integrated body, and the rotary shaft of the integrated body can be fitted to the valve body at a plurality of rotational phases around the rotary shaft center. And a plurality of connected parts connected to the connecting part, the rotating shafts corresponding to the rotating shafts fitted to the valve body in a plurality of rotation phases, respectively, and The membrane gas meter according to claim 1, wherein the rotary body is provided in the rotating body in a state in which the rotational phase around the axis is different. 4. The valve section supplies and discharges gas to and from the measuring chamber in accordance with the rotation of a valve element that is rotationally operated around the rotation axis, and The valve body is configured to be in the same supply / discharge state when the valve body is rotated in a plurality of rotation phases at predetermined intervals, and the valve portion opening / closing operation linkage mechanism rotates the rotation axis around the rotation axis. A rotary shaft that rotates integrally with the body, and the rotary shaft is connected to the valve body so as to rotate integrally; and the instrumental error matching means uses the valve body as the operating body to rotate the rotary shaft. Adjusting the rotation phase of the valve portion connected to the plurality of rotation phases to adjust the linked state, and the locking provided so as to project radially outward from the rotation shaft. A plurality of engaged parts that are engaged with a portion of the valve body, The membrane gas meter according to claim 1, wherein the membrane gas meter is provided on the outer peripheral portion of the valve body in a state in which it corresponds to each rotation and a state in which the rotation phase around the rotation axis is different. . 5. The plurality of engaged portions correspond to respective times when the valve body is rotated in the plurality of rotation phases,
In a state in which a plurality of rows are arranged along the circumference of the rotation axis, and as a plurality of engaged portions to be arranged, among a plurality of steps for adjusting the linked state, those corresponding to a step other than an adjacent step The membrane gas meter according to claim 4, wherein the gas gas meter is provided in a state in which is located.