JP6184008B2 - Meter unit - Google Patents

Description

  The present invention relates to, for example, a meter unit for installing a water meter for measuring the amount of water used, and more particularly to a primary mechanism portion of a crimp-fixed meter unit.

The water meter is obliged to be replaced every eight years, and in recent years, as a meter unit for the water meter, a pressure-fixing type meter unit in which the water meter can be easily attached and detached is often used. .
As such a meter unit, for example, a water meter unit as disclosed in Patent Document 1 is disclosed. In this type of water meter unit, generally, the primary side mounting portion 2 of the meter unit 1 shown in FIG. 6 and the secondary side mounting portion (not shown) are mounted on the upper surface portion 5 of the base 4. It becomes possible to place the primary side and the secondary side of the water meter 6 on the substantially arc-shaped mounting portions provided on the primary side mounting portion 2 and the secondary side mounting portion, respectively, and to receive the support. Yes. The water meter 6 is crimped between the primary side mounting portion 2 and the secondary side mounting portion by an operation on the primary side mounting portion 2 side of the water meter unit 1. A base part 7, a pipe part 8, a slider 9, and an operation handle 10 are provided on the primary side attachment part 2 side of the water meter unit 1.

  In FIG. 6, the pipe portion 8 and the slider 9 are both provided in the base portion 7 with the primary side of the slider 9 fitted in the pipe portion 8, and the male screw 11 provided on the slider 9 is Since it is formed at the position of the base portion 7, it is screwed into the screw 12. On the outer periphery of the slider 9, a sealing O-ring 13 that seals between the pipe portion 8 is mounted. With this structure, when the operation handle 10 is rotated in the primary side attachment portion 2, the slider 9 rotates, the slider 9 moves forward and backward with respect to the base portion 7, and the water meter 6 is crimped or released. The water meter 6 can be attached and detached. When the slider 9 advances and retreats, the slider 9 and the base portion 7 side are sealed with a sealing O-ring 13, thereby preventing external leakage on the primary side of the meter unit 1.

JP 2008-101386 A

In the pressure-fixing type meter unit 1 of Patent Document 1 or FIG. 6, when the slider 9 is advanced or retracted to crimp or release the water meter 6, the sealing O-ring 13 attached to the slider 9 seals. Slide in the crimping direction with respect to the part. In this case, since the seal portion of the sealing O-ring 13 and the slider 9 is in contact with the fluid, scale or patina adheres to them after a long period of use or the like, and this deposit gets caught in the sealing O-ring 13. Or the sealing O-ring 13 may be caught and twisted or damaged.
Therefore, in this meter unit, it is necessary to replace or maintain the sealing O-ring 13 when replacing the water meter 6 in order to ensure sealing performance. At that time, the seal point of the sealing O-ring 13 changes due to the difference in the surface-to-surface dimensions of the water meter 6, and the sealing O-ring 13 comes into contact with the uneven portion of the deposit, making it difficult to ensure sealing performance. There was also. As a result, a leak may occur immediately after replacing the sealing O-ring 13, or even if there is no leak immediately after replacement of the water meter 6, a leak may occur after several days.

  The present invention has been developed in order to solve the above-described problems, and the object of the present invention is a meter unit in which a water meter can be easily attached and detached by a crimping fixing method, and a seal portion is slid. It is another object of the present invention to provide a meter unit that can prevent leakage for a long period of time without attaching or detaching a water meter, ensuring sealing performance without replacement or maintenance of a seal portion associated with crimping and fixing the water meter.

  In order to achieve the above object, the invention according to claim 1 is provided with a primary side mounting member and a secondary side mounting member that are crimped and fixed to a water meter in the longitudinal direction of the base body. In a meter unit in which a crimping member for crimping one end of a meter to a member is provided so as to be movable back and forth along the meter crimping direction, an expansion / contraction member provided to be stretchable in the crimping direction of a water meter while sealing a flow path in the crimping member The other end side of this expansion-contraction member is connected to the fixed part side of the primary side attachment member in a sealed state.

  The invention according to claim 2 is a meter unit in which the expansion / contraction member is a bellows-shaped bellows tube, and both end portions of the bellows tube are welded to the crimping member and the fixed portion side, respectively, and these are connected.

  According to a third aspect of the present invention, the fixed portion side is a core member provided in the primary mounting member, and one end of the bellows pipe is connected to the core member and the other end is connected to the crimping member. Is a meter unit that is attached to a slide member that advances and retreats via a threaded engagement with the primary side attachment member.

  The invention according to claim 4 is a meter unit in which an O-ring is attached to a core member, and a pipe is rotatably connected to the core member via the O-ring.

  In the invention according to claim 5, the O-ring mounting portion of the core member protrudes upstream from the primary side mounting member, and the O-ring is provided to be exchangeable from the outside of the primary side mounting member by attaching and detaching the pipe. It is a meter unit.

  The invention according to claim 6 is a meter unit in which a protective cylinder that advances and retreats along with the expansion and contraction of the bellows pipe is provided on the inner periphery of the crimping member, and one end of the protective cylinder is fixed to the crimping member.

  According to a seventh aspect of the present invention, a pin for preventing the advancement operation of the crimping member is arranged on the base body, and this pin is locked in a rotation prevention groove formed in a support portion for meter end portion support provided on the crimping member. This is a meter unit that regulates the bellows tube to below the maximum extension.

  According to the first aspect of the present invention, the water meter is a meter unit that can be easily attached / detached by a crimping type, and one end side of an expansion / contraction member that seals the flow path is connected to the crimping member, and the other end side of the expansion / contraction member Are connected to the fixed part side of the primary side mounting member in a sealed state, so that the crimping member can be advanced and retracted by expanding and contracting the expanding and contracting member while ensuring the sealing state without providing a sealing O-ring on the crimping member. I can move. Therefore, even when a water meter is attached or detached every 8 years, it is possible to prevent entrapment and catching of scales and patinas without sliding the seal part, and for high water use while exhibiting high sealing properties and preventing leakage. The meter can be crimped. Furthermore, replacement and maintenance of the sealing O-ring are not required, and maintenance of the crimping portion can be realized while preventing leakage over a long period of time.

  According to the second aspect of the present invention, the pressure-bonding member and the fixed portion side are welded and connected by the expansion / contraction member formed of the bellows-shaped bellows tube, so that the sealing property is secured by the expansion / contraction of the bellows tube. The crimping member can be advanced and retracted, so that it can be firmly crimped in response to crimping of water meters having different face-to-face dimensions. Furthermore, if the bellows tube is formed of a material such as stainless steel, it is possible to exhibit excellent corrosion resistance.

  According to the invention of claim 3, when the fixed portion side is a core member, and the bellows pipe connected to the crimping member can be connected to the core member, the manufacture becomes easy, and when the core member is mounted on the primary side mounting member In addition, the crimping member can be arranged at a predetermined position via the bellows tube. At the time of rotation of the slide member, it can be advanced and retracted without rotating the crimping member with respect to the water meter, so that it can be crimped and fixed while ensuring the sealing property with the water meter.

  According to the invention which concerns on Claim 4, since piping can be rotated, maintaining sealing performance with an O-ring, this piping can be rotated according to an installation place and direction, and external connection piping can be connected easily.

  According to the fifth aspect of the present invention, since the O-ring can be exchanged from the outside of the primary side mounting member by attaching and detaching the pipe, the core member, the bellows pipe, and the crimping member remain attached to the primary side mounting member. The sealability between the core member and the pipe can be easily restored.

  According to the sixth aspect of the invention, since the bellows pipe can be shielded from the flow path by the protective cylinder, the flow can be made smooth by suppressing the stagnant flow to the bellows pipe, and the fluid contact with the bellows pipe is minimized. It becomes possible to suppress deterioration by suppressing.

  According to the invention of claim 7, while preventing the crimping member from being pulled out, the maximum extension of the bellows tube can be restricted to prevent the breaking in the extending direction, and the twisting of the bellows tube can also be prevented to break the rotating direction. I can stop. For this reason, durability at the time of advancement / retraction of the crimping member can be improved, and the water meter can be crimped by smoothly operating to a predetermined state while preventing the water meter from rotating.

It is principal part sectional drawing which shows 1st Embodiment of the meter unit in this invention. It is principal part sectional drawing which shows the secondary side of a meter unit. It is principal part sectional drawing which shows the state which retracted the crimping | compression-bonding member of FIG. FIG. 2 is a partially omitted AA cross-sectional view of FIG. 1. It is principal part sectional drawing which shows 2nd Embodiment of the meter unit in this invention. It is sectional drawing which shows the primary side of the conventional meter unit.

An embodiment of a meter unit in the present invention will be described with reference to the drawings. In FIG. 1, the principal part of the primary side of 1st Embodiment of the meter unit of this invention is shown, and in FIG. 2, the secondary side of the meter unit is shown.
In the figure, a meter unit of the present invention (hereinafter referred to as a meter unit main body 20) has a primary side mounting member 23 and a secondary side mounting member 24 for fixing a base body 21 and a water meter 22 by pressure bonding. Yes. The primary side mounting member 23 and the secondary side mounting member 24 are respectively disposed on the primary side and the secondary side in the longitudinal direction of the base body 21, and the primary side mounting member 23 includes one end of the meter 22. A crimping member 30 for crimping the portion is provided so as to freely advance and retract along the meter crimping direction.

  The base body 21 is formed in a long shape from a metal plate material such as a steel material by press drawing. The base body 21 has a base portion 33 having a substantially U-shaped cross section that opens downward and has both side lower surfaces 31, 31 and an upper surface 32, and flange portions 34, 34 on both sides of the base portion 33. Yes. On both sides of the base portion 33 in the longitudinal direction, that is, on both sides of the upper surface 32, guide rails (not shown) are formed to project. A holding band 35 is placed on the upper surface 32 between these guide rails.

  On the primary side mounting member 23 side of the base body 21, for example, a mounting hole 36 having a bottomed hole with a hole diameter of about 4 mm is provided, and a pin 37 protrudes from the base body upper surface 32 and is attached to the mounting hole 36. The pin 37 is disposed at a position that prevents the crimping member 30 from being advanced beyond the crimping fixing position of the meter 22 before the meter is mounted. Thereby, the space | interval more than the minimum surface of a meter is ensured between the primary side attachment member 23 and the secondary side attachment member 24 before meter 22 mounting | wearing.

Two insertion holes 42 for inserting bolts 41 are formed in positions near both ends of the upper surface 32 of the base body 21, and a notch groove 43 for fixing anchor bolts (not shown) is formed at the center position of the outer end of the flange portion 34. Is formed.
In addition, the drawing process which is a shaping | molding process means of the base body 21 generally refers to the press work which shrinks a plane and forms a seamless body shape. Further, the base body 21 may be provided in a structure in which a protrusion is partially provided on the upper surface 32 instead of the guide rail, and the holding band 35 is held by the protrusion.

  In FIG. 1, a primary side mounting member 23 is provided with a base 50, and in addition to the crimping member 30, an expansion / contraction member 51, a core member 52, a pipe 53, a slide member 54, and a handle 55 are provided on the base 50. . On the other hand, in FIG. 2, the base 60 is provided on the secondary mounting member 24, and the fixing member 61 and the check valve 62 are provided on the base 60.

  The bases 50 and 60 are formed of an appropriate metal (for example, stainless steel) by casting, for example, and a female screw 63 communicating with the insertion hole 42 is provided on the base body 21 side. By screwing a bolt 41 such as a hexagon socket bolt to the female screw 63, the primary side and secondary side base portions 50 and 60, the base body 21, and the holding band 35 are integrated, respectively. The water meter 22 can be supported.

  A female screw portion 64 is formed in the axial direction on the water meter 22 mounting side of the base 50 on the primary side, and a mounting portion 65 including a space is provided following the female screw portion 64. Near the center of the mounting portion 65, an annular locking piece 66 is formed protruding in the inner circumferential direction, and the crimping member 30, the elastic member 51, and the core member 52 are mounted on the base portion 50.

  In FIG. 1, the crimping member 30 is provided for crimping the primary side of the water meter 22, one end side of the expansion / contraction member 51 is connected to the crimping member 30, and the other end side of the expansion / contraction member 51 is the primary side. The mounting member 23 is connected in a sealed state to the fixed portion side.

  The crimping member 30 is formed in a substantially disk shape, and a sealing member 71 for sealing is attached to the crimping side of the water meter 22. An arc-shaped support portion 72 is formed to project from a lower portion of the pressure-bonding member 30 on the pressure-bonding side, and the meter end portion 22 a of the water meter 22 can be supported on the support portion 72. An anti-rotation groove 73 that can lock the pin 37 is formed in the support portion 72 in a straight line. After the pressure bonding member 30 is attached, the pin 37 is locked to the rotation prevention groove 73 and Prevent rotation. The rotation preventing groove 73 is provided with a length that restricts the expansion / contraction member 51 to the maximum extension or less, and is restricted by the locking of the pin 37 so that the expansion / contraction member 51 extends / contracts below the maximum extension.

  The crimping member 30 is attached to the base 50 via a slide member 54. The slide member 54 is provided in a shape in which a cylindrical small-diameter portion 75 and a large-diameter portion 76 are connected, and a male screw portion 77 that is screwed into the female screw portion 64 of the base 50 on the outer periphery of the small-diameter portion 75. Is provided. The slide member 54 is provided in the base portion 50 so as to be able to advance and retract through the threaded engagement of the male screw portion 77 and the female screw portion 64.

  An accommodating portion 78 and an annular mounting groove 79 are provided inside the large-diameter portion 76, and the crimping member 30 is accommodated in the housing portion 78, and the snap ring 80 is fitted into the mounting recess 79 so that the crimping member 30 is fitted. It is attached to the slide member 54 in a retaining state. Thereby, the slide member 54 is rotatable with respect to the crimping member 30. A polygonal part 81 made of, for example, a hexagon is formed on the outer periphery of the large diameter part 76, and a handle 55 is attached to the polygonal part 81.

The expansion / contraction member 51 is provided by a material such as SUS, for example, and is provided so as to be expandable / contractible in the pressing direction of the water meter 22 while sealing the flow path 82 provided in the primary side attachment member. The expansion / contraction member 51 is formed of a bellows-shaped bellows tube, and both end portions of the bellows tube 51 are welded and connected to the crimping member 30 and the fixed portion side, respectively. In the present embodiment, one end portion of the bellows pipe 51 is welded and connected to the outer periphery P of the cylindrical protrusion 56 provided at the end portion of the core member 52, which is slightly outer periphery than a later-described flow channel 82. The other end of the bellows tube 52 is welded to the circumferential end Q of the crimping member 30, and a cylindrical protrusion (not shown) is provided as in the case of the core member 52. It may be welded and connected to the outer periphery.
The expansion / contraction of the expansion / contraction member 51 allows the pressure-bonding member 30 to move forward and backward in the pressure-bonding direction of the water meter 22, and the water-pressure meter 22 can be pressure-bonded by the pressure-bonding member 30 while ensuring sealing performance.

  As shown in FIG. 4, the core member 52 is formed in a substantially cylindrical shape, and is provided in the primary side attachment member 23 as the fixed portion side. One end of the bellows tube 51 is connected to the core member 52, and the other end is connected to the crimping member 30 as described above. An annular locking projection 83 is formed on the outer periphery of the secondary side of the core member 52, and an annular groove 84 is formed on the outer periphery of the locking projection 83 so as to be opposed to two places. The core member 52 is prevented from moving to the primary side by the locking projection 83 being locked to the locking piece 66 of the base 50, and is further provided with a female screw provided facing two locations on the side surface of the base 50. A set screw 86 is screwed to 85 and the distal end side of the set screw 86 is locked in the concave groove 84, whereby the base 50 is fixed in a state in which rotation is prevented.

A groove-shaped O-ring mounting portion 87 is provided on the outer periphery on the primary side of the core member 52, and a sealing O-ring 90 is mounted on the O-ring mounting portion 87. A pipe 53 is rotatably connected to the core member 52 via an O-ring 90.
The sealing O-ring 90 is a fixing sealing part that seals between the core member 52 and the pipe 53 (or the primary side mounting member 23), and is a crimping member to the water meter 22 shown in the subject of the present invention. Since it is different from the seal part for movement which seals between 30 and the slide member 54 and the primary side attachment member 23, there is no fear of adhesion of scale or patina.

  The O-ring mounting portion 87 is provided so as to protrude upstream from the primary side mounting member 23 and is exposed to the outside of the primary side mounting member 23 when the pipe 53 is attached or detached. Thereby, the O-ring 90 is provided to be exchangeable from the outside of the primary side attachment member 23.

  For example, the pipe 53 is formed in an elbow shape as shown in FIGS. 1 and 3 and is provided so as to be connectable to an external pipe (not shown). An annular groove 91 is formed on the insertion side of the pipe 53 to the base 50. In FIG. 4, the pipe 53 is inserted from the primary side of the base 50 and is formed to be opposed to two sides of the side of the base 50. When the retaining bolt 93 is screwed to the female screw portion 92, the tip end side is engaged with the annular groove 91, so that it can be rotated with respect to the base portion 50. As a result, the connection direction with the external pipe can be changed by loosening the set bolt 93 and rotating the pipe 53. Furthermore, if the set bolt 93 is loosened until the lock is released from the annular groove 91, the pipe 53 can be attached to and detached from the base 50.

  The handle 55 has a hexagonal portion that can be fitted to the polygonal portion 81 on the inner peripheral side, and the slide member 54 is integrated by fitting the polygonal portion 81 to the hexagonal portion. In this case, the handle 55 is made of, for example, a resin such as polyacetal, and is press-fit to the polygonal portion 81 and firmly integrated with the slide member 54. When the handle 55 is rotated, this rotational force is transmitted to the slide member 54, and the slide member 54 moves forward and backward with respect to the base 50 together with the handle 55 through screwing of the male screw portion 77 and the female screw portion 64. . A through hole 94 is formed in the handle 55, and the handle 55 can be fixed after the water meter 22 is pressed through the through hole 94.

  When the handle 55 is rotated, the slide member 54 advances and retreats while rotating with respect to the base 50, and the crimping member 30 that is prevented from coming off by the slide member 54 also moves forward and backward. At this time, since the slide member 54 is rotatably provided on the crimping member 30 and the pin 37 is locked to the rotation preventing groove 73, the rotation of the slide member 54 is restricted with respect to the base body 21 (base 50). 30 does not rotate together with the slide member 54, and can move forward and backward while maintaining the orientation in which the support 72 can support the water meter 22. Thus, the primary side of the water meter 22 can be crimped or released to a predetermined position by advancing and retracting the crimping member 30 while being restricted in rotation.

  On the other hand, in the secondary side attachment member 24 shown in FIG. 2, the fixing member 61 is formed in a substantially cylindrical shape and seals the outer peripheral side male threaded portion 100 and the secondary side of the water meter 22 with pressure contact. And a crimping portion 101 to which 71 is attached. The check valve 62 is provided in an appropriate internal structure, and is provided to prevent a backflow from the secondary side. Thus, the check valve 62 is built in the base portion 60 on the secondary side, and the male screw portion 100 is formed on the base portion 60 from above, so that the fixing member 61 is integrated by screwing with the screw portion 102. The fixing member 61 can be provided in any shape as long as the secondary side of the water meter 22 can be crimped and fixed.

  The holding band 35 on the base body 21 is formed in a long shape by an elastic resin such as ABS resin or polyacetal, and has a width that can be placed on the upper surface 32 between the guide rails. On the upper surface of the secondary side of the holding band 35, a support member 105 is provided for supporting the secondary side of the water meter 22.

  In the vicinity of both ends on the primary and secondary sides of the holding band 35, through holes 106 for fixing the bolts 41 and protrusions 107 are formed at positions where the insertion holes 42 of the base body 21 face each other. Two through holes 106 are provided on each end side in accordance with the position of the insertion hole 42. The protrusion 107 is provided for positioning. When the holding band 35 is placed on the base body 21, the protrusion 107 is inserted into the insertion hole 42 so that the holding band 35 is placed at a predetermined position on the base body 21. Mounted.

  The support member 105 on the secondary side is formed with a substantially arcuate mounting portion 108, and the secondary side of the water meter 22 can be supported on the mounting portion 108. A groove-like rib receiving portion 109 is formed in the longitudinal direction on the primary side of the mounting portion 108 of the supporting member 105. The support member 105 is fixed to a predetermined position of the holding band 35 by an appropriate means such as snap fitting using an uneven portion.

  When the water meter 22 is placed on the support member 105, the rib 22b formed on the bottom surface side of the water meter 22 is fitted between the rib receiving portions 109, so that the water meter 22 is in an appropriate mounting direction. This can be confirmed, and the reverse installation of the water meter 22 can be prevented. In addition, the fitting of the rib 22b and the rib receiving portion 109 prevents the water meter 22 from rotating relative to the meter unit main body 20.

  When the water meter 22 is crimped and fixed to the meter unit main body 20, the primary side and the secondary side of the water meter 22 in FIGS. 1 and 2 are placed on the support 72 and the support member 105, respectively. In FIG. 1, the handle 55 is rotated upward. As a result, the slide member 54 screwed to the base portion 50 rotates and advances together with the handle 55, and the crimping direction is maintained while the crimping member 30 is kept rotationally regulated by the pin 37 while holding the mounting state of the water meter 22. The water meter 22 can be crimped and fixed while aligning. At this time, the expansion / contraction member 51 extends in accordance with the advancement of the crimping member 30, and the sealing performance of the flow path 82 is ensured. The extension stroke of the elastic member 51 is preferably suppressed to, for example, 6 mm or less. In this case, it is easy to suppress the consumption of the elastic member 51.

  After the water meter 22 is crimped, the sealing members 71 and 71 on the primary and secondary sides can ensure the sealing performance of the crimped portion, and the pin 37 prevents the rotation when the handle 55 is rotated more than necessary. Locking to the end side of the groove 73 reliably prevents the crimping member 30 from being advanced more than necessary, and the seal member 71 is not excessively pressed.

  When the water meter 22 is replaced, by rotating the handle 55 downward in FIG. 1, the crimping member 30 is crimped while the telescopic member 51 is contracted as shown in FIG. Retracting in the release direction, the crimping to the water meter 22 can be loosened.

  As described above, the meter unit of the present invention is connected to the crimping member 30 at one end side of the expansion / contraction member 51 made of a bellows tube, and the other end side of the bellows tube 51 is provided in the primary side mounting member 23. Since the core member 52 is connected in a sealed state, the crimping member 30 can be advanced and retracted via the bellows pipe 51 without requiring an O-ring seal when the water meter 22 is attached or detached. For this reason, deterioration of the sealing performance due to adhesion of scale or patina can be avoided, and leakage can be prevented without requiring replacement of internal parts over a long period of time.

  In this case, by using the core member 52, the bellows tube 51 can be integrally configured as a slide member unit portion with a bellows tube, which is previously welded to the core member 52 and the crimping member 30, and can be attached to the primary side mounting member 23. It becomes easy. In the present embodiment, the bellows tube 51, the core member 52, and the crimping member 30 are made of stainless steel.

  In addition, in FIG. 1, when assembling these, the slide member 54 with the handle 55 attached is inserted into the unit portion from the core member 52 side, and the crimping member 30 is fitted into the accommodating portion 78 of the slide member 54. Then, the crimping member 30 is locked by the snap ring 80. Then, when mounting these parts on the primary side mounting member 23, if the inner periphery of the unit part is supported by, for example, a cylindrical jig 58 indicated by a two-dot chain line, the bellows pipe 51 is bent. Accordingly, the meter unit main body 20 can be easily assembled.

In FIG. 5, 2nd Embodiment of the meter unit of this invention is shown. In addition, in this embodiment, the same part as the said embodiment is represented by the same code | symbol, and the description is abbreviate | omitted.
In the meter unit in this embodiment, a protective cylinder 110 is provided on the inner periphery of the crimping member 30 so as to advance and retreat with the expansion and contraction of the bellows tube 51, and one end of the protective cylinder 110 is fixed to the crimping member 30 via a welded portion 111. Yes. The other end side of the protective cylinder 110 is not fixed and is in sliding contact with the inner periphery of the core member 52.
Thereby, the expansion-contraction member 51 is shielded from the flow path 82 by the protection cylinder 110, and the contact of the fluid which flows through the inside is avoided. Therefore, the stagnant flow to the bellows pipe 51 can be prevented and the fluid can flow smoothly, and adhesion of water scale, patina, dust, etc. to the elastic member 51 is also prevented and is not easily deteriorated.

  Although not shown, when the pressure-bonding structure in the meter unit of the present invention is provided, in addition to providing the pressure-bonding member and the slide member separately as in the present embodiment, they can be provided integrally. In this case, for example, an integrated crimping member may be screwed into a handle rotatably provided at the base, and the crimping member may be advanced and retracted by turning the handle.

Although the bellows tube is used as the elastic member of the present embodiment, other types of elastic members can be used as long as the crimping member and the fixed portion side can be connected while the flow path is sealed.
The base body of the meter unit may be provided by a processing means other than press working. For example, the base unit may be integrated with the base body by casting or the like.

20 Meter unit body 21 Base body 22 Water meter 23 Primary side mounting member 24 Secondary side mounting member 30 Crimping member 37 Pin 51 Bellows tube (expandable member)
52 Core member (fixing part)
53 Piping 54 Slide member 72 Supporting portion 73 Anti-rotation groove 82 Flow path 87 O-ring mounting portion 90 O-ring 110 Protection cylinder

Claims (7)

  In the longitudinal direction of the base body, a primary side mounting member and a secondary side mounting member for crimping and fixing a water meter are disposed, and a crimping member for crimping one end of the meter to the primary side mounting member In the meter unit provided so as to be able to advance and retreat along, the one end side of the expansion / contraction member provided to be extendable / contractible in the pressure-bonding direction of the water meter while sealing the flow path to the pressure-bonding member, Is connected to the fixed part side of the primary side mounting member in a sealed state.   2. The meter unit according to claim 1, wherein the elastic member is a bellows-like bellows tube, and both end portions of the bellows tube are welded to the crimping member and the fixed portion side to connect them.   The fixed portion side is a core member provided in the primary side attachment member, and one end of the bellows pipe is connected to the core member and the other end is connected to the crimp member, and the crimp member is connected to the primary member. The meter unit according to claim 2, wherein the meter unit is attached to a slide member that advances and retreats via a threaded engagement with the side attachment member.   The meter unit according to claim 3, wherein an O-ring is attached to the core member, and a pipe is rotatably connected to the core member via the O-ring.   The O-ring mounting portion of the core member protrudes upstream from the primary side mounting member, and the piping is attached and detached so that the O-ring can be replaced from the outside of the primary side mounting member. The meter unit described in.   The meter unit according to any one of claims 2 to 5, wherein a protective cylinder that advances and retreats along with expansion and contraction of the bellows pipe is provided on an inner periphery of the crimping member, and one end of the protective cylinder is fixed to the crimping member.   A pin for preventing the crimping member from moving forward is disposed on the base body, and the pin is engaged with a rotation preventing groove formed in a meter end supporting portion provided on the crimping member, thereby the bellows tube The meter unit according to any one of claims 2 to 6, wherein the length is regulated to be equal to or less than a maximum extension.

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