JPH10311769A - Fluid measurement indicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust an indicating part to a desired rotation position always, preventing fluid leakage from a fluid connecting from a fluid connecting part, and the breakage of the fluid connecting part, in the case of a pressure gauge and so on. SOLUTION: A fitting recession 15 is formed in a fluid connecting part 12 having a screw thread 20, and a projecting streak 16 is formed in the fitting recession 15. On the other hand, a cylindrical part 6 is protruded from the rear surface 5 of a container 2 provided with a pointer 9 as an indicating part, and the cylindrical part 6 is press-fitted to the fitting recession 15. Consequently, the cylindrical part 6 cuts into the protruding streak 16, and the container 2 is supported in a way capable of rotation-adjustable steplessly around the axis line of the fluid connecting part 12. As the result, it becomes possible to keep a pointer as an indicating part at a specified rotation position always along with the container 2, regardless of the quantity of screwing of the screw thread 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid measurement display, such as a pressure gauge, which measures the state of a fluid and displays the measurement result.

[0002]

2. Description of the Related Art Generally, a fluid measurement display such as a pressure gauge, a hygrometer, and a thermometer is used to measure and manage a pressure state, a humidity state, a temperature state, and the like of a fluid.

[0003] For example, a pressure gauge is provided with a fluid connection portion connected to a predetermined fluid measurement site, and a fluid to be measured is input into the pressure gauge via the fluid connection portion. A pressure detector is provided in the pressure gauge, and a pointer provided on a display unit on the front surface of the pressure gauge indicates a scale corresponding to the pressure according to a detection result of the pressure detector.

Conventionally, as a means for connecting a fluid measuring portion and a fluid connecting portion, a fluid connecting portion is formed in a cylindrical shape and a thread is formed on an outer periphery thereof, and is formed at the fluid measuring portion. It is screwed into the screw hole.

[0005] As described above, a fluid measurement display having a thread formed on the outer periphery of a fluid connection portion is widely used as having a simple connection means.

[0006]

However, since the fluid measurement display such as a pressure gauge and the fluid connection portion are integrally formed, the thread of the fluid connection portion is screwed into the screw hole of the fluid measurement portion. In such a case, the fluid measurement indicator rotates together with the fluid connection. In order to prevent fluid leakage between the fluid measurement site and the fluid connection, it is necessary to sufficiently screw the fluid connection. In this case, due to factors such as a manufacturing error of the screw length of the fluid connection portion and a manufacturing error of the depth of the screw hole of the fluid measurement portion, the display portion of the fluid measurement display may not be accurately positioned vertically. The display part is very difficult for the user to see.

Further, if the screwed amount of the fluid connection portion is reduced so that the display portion is accurately positioned vertically, fluid leakage occurs, and if the screwed amount is increased, the screw portion may be damaged. In particular, such a problem is likely to occur in a small fluid measurement display.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a method for measuring a fluid by screwing a fluid connection portion having a thread into a screw hole formed in a fluid measurement portion. An object of the present invention is to provide a display device in which a display unit can always be adjusted to a desired rotational position while preventing fluid leakage from the fluid connection unit and damage to the fluid connection unit. Another object of the present invention is to achieve the above object with a simple structure and to simplify the assembling work.

[0009]

In order to solve the above-mentioned problems, the invention according to claim 1 is formed in a cylindrical shape, and its inner peripheral side is used as a flow path for inputting a fluid from the outside. A fluid connection portion formed on the outer peripheral side with a screw thread to be screwed into a screw hole formed in the fluid measurement portion; a measurement portion for measuring a state of a fluid input from a flow path of the fluid connection portion; and a measurement portion. And a display unit for displaying the result of measuring the state of the fluid measured by the method described above, wherein the display unit is steplessly aligned with the fluid connection unit along the rotational direction when the fluid connection unit is screwed. Adjustable.

According to a second aspect of the present invention, a screw formed in a cylindrical shape, the inner peripheral side of which is a flow path for inputting a fluid from the outside, and the outer peripheral side of which is formed at a fluid measuring portion. A fluid connection portion formed with a screw thread to be screwed into the hole, a measurement portion for measuring the state of the fluid input from the flow path of the fluid connection portion, and a display for displaying a result of measurement of the fluid state measured by the measurement portion In the fluid measurement display having a main body having a built-in portion, the main body can be continuously adjusted with respect to the fluid connection portion along a rotation direction when the fluid connection portion is screwed.

According to a third aspect of the present invention, in the fluid measurement display according to the first or second aspect, the display surface of the display unit is disposed on a surface substantially orthogonal to an axial direction of the fluid connection unit. did.

According to a fourth aspect of the present invention, in the fluid measuring and displaying device according to the second aspect, a mounting recess is formed on the body side of the fluid connection portion, and a mounting recess is formed on the fluid connection portion side of the main body. A cylindrical portion is integrally provided, and a ridge for guiding and supporting the cylindrical portion in the circumferential direction is provided in the mounting recess, and the measuring portion is connected to the inner peripheral side of the fluid connection portion and the inner peripheral side of the cylindrical portion. The fluid was supplied, and the ridge supported the main body in a steplessly adjustable manner along the rotational direction when the fluid connection portion was screwed.

According to a fifth aspect of the present invention, in the fluid measurement display according to the fourth aspect, the protrusion is formed of a harder material than the cylindrical portion, and the cylindrical portion is press-fitted into the mounting recess. The outer peripheral surface of the cylindrical portion bites into the ridge, and the cylindrical portion is supported by the ridge with the bite.

The "action" of the present invention will be described below. According to the first aspect of the present invention, the thread formed on the outer peripheral side of the fluid connection portion is screwed into the screw hole formed in the predetermined fluid measurement portion, so that the fluid connection portion is connected to the fluid measurement portion. Connected. Then, the fluid is input to the measurement unit via the flow path on the inner peripheral side of the fluid connection unit, and the measurement result of the fluid state by the measurement unit is displayed on the display unit. By the screwing operation of the fluid connection part, the display part also rotates at the same time, and there is a possibility that the rotation position will be difficult to see for the operator,
Since the display unit can be continuously adjusted along the rotation direction when the fluid connection unit is screwed, the display unit can be arranged at a desired rotation position after the connection of the fluid connection unit. As a result, the display portion can always be arranged in an easily viewable state, and furthermore, it is not necessary to loosen or overtighten the fluid connection portion, thereby preventing fluid leakage and breakage of the fluid connection portion.

According to the second aspect of the present invention, the thread formed on the outer peripheral side of the fluid connection part is screwed into the screw hole formed at the predetermined fluid measurement site, so that the fluid connection part is fluid. Connected to the measurement site. Then, the fluid is input to the measurement unit via the flow path on the inner peripheral side of the fluid connection unit, and the measurement result of the fluid state by the measurement unit is displayed on the display unit. By screwing in the fluid connection part, the main body including the display part also rotates at the same time, and the display part may be in a rotational position that is difficult for an operator to see.However, the display part is rotated together with the main body when the fluid connection part is screwed. The stepless adjustment along the direction allows the body to be positioned at the desired rotational position after connection of the fluid connection. As a result, the display portion can always be arranged in an easily viewable state, and furthermore, it is not necessary to loosen or overtighten the fluid connection portion, thereby preventing fluid leakage and breakage of the fluid connection portion.

According to the third aspect of the present invention, the first aspect is provided.
Alternatively, in addition to the function of the invention described in claim 2, since the display surface of the display unit is provided on a surface substantially orthogonal to the axial direction of the fluid connection unit, when the fluid connection unit is attached to the side surface, It is possible to accurately adjust the vertical position of the display unit.

According to the invention described in claim 4, according to claim 2,
In addition to the operation of the invention described in (1), by providing a ridge for guiding and supporting the cylindrical portion of the main body in the circumferential direction in the mounting recess of the fluid connection portion, the main body does not move along the rotation direction when the fluid connection portion is screwed. The stepwise adjustable support simplifies the configuration for making the body adjustable.

According to the invention set forth in claim 5, according to claim 4,
In addition to the effect of the invention described in the above, the protrusion is made of a harder material than the cylindrical portion, and the cylindrical portion outer peripheral surface bites into the protrusion by press-fitting the cylindrical portion into the mounting recess, and the cylindrical portion is in the bite state. By being supported by the ridge, the assembly is completed only by press-fitting the cylindrical portion into the mounting recess, so that the assembling work can be simplified in addition to the simplification of the configuration.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a fluid measurement display of the present invention is embodied in a pressure gauge will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, a container 2 as a main body of the pressure gauge 1 is formed in a bottomed cylindrical shape having an open front surface 3, and a transparent window 4 is fitted and fixed to the front surface. . The container 2 and the transparent window 4 are formed of a synthetic resin.

At the center of the rear surface 5 of the container 2, a cylindrical portion 6 projecting rearward from the container 2 is formed integrally with the container 2 by a synthetic resin. At the rear end side of the cylindrical portion 6, a step portion 6a is formed.

A pressure detector as a measuring unit is provided in the container 2.
Specifically, a known Bourdon tube 8 is provided, and a tube portion 7 as an input end of the Bourdon tube 8 is adhesively fixed to the inner peripheral surface of the cylindrical portion 6. The first passage 7a of the tube 7 is a Bourdon tube 8
The Bourdon tube 8 is displaced in accordance with the pressure of the fluid introduced through the first passage 7a.

A pointer 9 as a display unit is fixed to the output end of the Bourdon tube 8. The pointer 9 is rotatably supported by a support shaft 10 projecting rearward from the transparent window 3, that is, into the container 2.

Accordingly, the Bourdon tube 8 is displaced in accordance with the pressure of the fluid introduced through the first passage 7a of the tube portion 7, and the pointer 9 rotates about the support shaft 10 based on the displacement. Displaced.

As shown in FIG. 4, on the surface of the transparent window 4,
The scale 11 as a display unit is formed by applying a predetermined coloring (white in the present embodiment), and is configured to also function as a scale plate.

Next, the structure of the fluid connection portion 12 connected to the rear surface side of the vessel 2 of the pressure gauge 1 will be described. The fluid connection portion 12 has a large diameter portion 13 and a rear end side of the large diameter portion 13. And a small-diameter portion 14 having a smaller diameter than the large-diameter portion 13,
The large diameter portion 13 and the small diameter portion 14 are integrally formed of a metal harder than the resin constituting the container 2.

The large-diameter portion 13 is formed with a mounting recess 15 which opens to the front end side, that is, the container 2 side. The mounting recess 15 has a length from the rear surface 5 of the container 2 to the rear ends of the cylindrical portion 6 and the tube portion 7. It is set to be slightly deeper. The diameter of the mounting recess 15 is formed slightly larger than the outer diameter of the cylindrical portion 6.

On the inner periphery of the large-diameter portion 13 corresponding to the mounting concave portion 15, a ridge 16 extending annularly in a plane perpendicular to the axial direction of the large-diameter portion 13 is integrally formed. Ridge 16
Is composed of a tapered surface 16a whose diameter is gradually reduced inward from the front end side to the rear end side, and a folded surface 16b which is bent at an acute angle from the tapered surface 16a.

The cylindrical portion 6 is inserted into the mounting recess 15, and is mounted on the ridge 16 such that the outer peripheral surface of the cylindrical portion 6 bites. The cylindrical portion 6 is supported by the fluid connection portion 12 such that the rotation can be adjusted steplessly. The inner peripheral surface of the mounting recess 15 prevents the cylindrical portion 6 from rattling.

A seal ring 17 is mounted on the outer periphery of the step 6a of the cylindrical portion 6, and the space between the mounting recess 15 and the cylindrical portion 6 is sealed by the seal ring 17, as shown in FIG. A hexagon bolt type tool engaging surface 18 is formed on the outer peripheral surface of the large diameter portion 13 so that a wrench or the like can be engaged.

A second passage 14a communicating with the first passage 7a of the tube portion 7 is formed in the inner periphery of the small diameter portion 14 so as to extend in the axial direction. On the outer periphery of the small diameter portion 14, as shown in FIG. 3, a screw thread 20 is screwed into a screw hole 19a formed in a predetermined fluid measurement site such as the panel 19.
Are formed. In addition, a gasket 21 is attached to a step formed between the large diameter portion 13 and the small diameter portion 14.

The indicator 9 and the scale 11 are provided on the surface of the fluid connection portion 12 which is substantially perpendicular to the axial direction. Here, the method of assembling the pressure gauge 1 will be described. First, as shown in FIG.
The seal ring 17 and the fluid connection part 12 are prepared. Next, a seal ring 17 is provided on the outer periphery of the rear end of the cylindrical portion 6 of the container 2.
Attach.

Thereafter, the cylindrical portion 6 of the container 2 is pressed into the mounting recess 15 of the fluid connection portion 12. The container 2 is formed of a synthetic resin including the cylindrical portion 6, while the fluid connection portion 1
2 is formed of a metal material harder than the synthetic resin material of the container 2 including the ridges 16, so that when the cylindrical portion 6 is pressed into the mounting recess 15, it is guided by the tapered surface 16 a of the ridges 16. As a result, the outer peripheral surface of the cylindrical portion 6 penetrates into the interior of the mounting recess 15 while biting. Thereby, the container 2 is connected to the fluid connection part 12 as shown in FIG. In this connection state, the container 2 does not fall off due to the folded surface 16b formed on the ridge 16. The container 2 is guided by the ridges 16 and supported so as to be capable of steplessly rotating around the axis of the fluid connection portion 12.

Next, the operation of the embodiment configured as described above will be described. Now, in order to attach the pressure gauge 1 to the panel 19 as shown in FIG.
Screw hole 19a formed in the small diameter portion 1 of the fluid connection portion 12
4 and a tool such as a spanner is locked on the tool locking surface 18 and the tool is rotated about the axis of the fluid connection portion 12 so that the fluid connection portion 12 is screwed into the screw hole 19a.
Thread 20 is screwed. Thereby, the pressure gauge 1 can be attached to the panel 19 as shown in FIG.

When the screw hole 19a and the screw thread 20 are screwed together, fluid leakage from between the screw hole 19a and the screw thread 20 is prevented by the gasket 21 which is in close contact with the panel 19.

Here, the screw thread 20 with respect to the screw hole 19a
If the amount of screwing is insufficient, the gasket 21 may not be able to sufficiently seal the fluid.
If the screw is screwed more than necessary, the screw hole 19a or the thread 2
Since the 0 is damaged, it cannot be screwed more than necessary.

Therefore, in order to secure the sealing performance of the gasket 21 and prevent the screw portion from being damaged, the rotational position of the fluid connection portion 12 is limited to a predetermined range. However, if the screwing amount is properly maintained as described above, the dimensional accuracy of the screw thread 20 is insufficient, and the like.
As shown in FIG. 4B or FIG. 4C, the pointer 9 and the scale 11 as the display unit may not be set at an accurate position when viewed vertically.

In this case, in this embodiment, the container 2 is continuously and rotationally adjusted clockwise or counterclockwise about the axis of the fluid connection portion 12 as shown in FIG. The scale 11 can be set at an accurate position when viewed vertically.

After this mounting, the panel 1
The fluid pressure P from the inner surface side of FIG. 9, that is, from the left side in FIG. 3, acts on the Bourdon tube 8 via the second passage 14a and the first passage 7a, and the Bourdon tube 8 is displaced according to the fluid pressure P. The pointer 9 is pivotally displaced about the support shaft 10 based on the displacement. Further, fluid leakage from between the container 2 and the fluid connection portion 12 is prevented by the seal ring 17. Therefore, the fluid pressure P is visually recognized by the scale 11 indicated by the pointer 9.

Next, effects of the present embodiment will be listed. The container 2 including the scale 11 and the pointer 9 as a display unit can be rotated with respect to the fluid connection unit 12, thereby preventing damage to the screw holes 19 a and the screw threads 20 and fluid leakage therefrom. Scale 11 and pointer 9 as a display unit
Can always be adjusted to the desired rotational position.

The container 2 including the scale 11 and the pointer 9 as a display unit can be adjusted in a stepless manner with respect to the fluid connection unit 12, so that the rotation can be finely adjusted. The scale 11 and the pointer 9 as a part can be accurately adjusted to a desired rotational position.

The container 2 is connected to the fluid connecting portion 12 simply by pressing the cylindrical portion 6 of the container 2 into the ridge 16 provided on the fluid connecting portion 12.
Since the rotation can be adjusted steplessly, the structure is simple and the assembling work is also simple.

The fluid connection portion 12 is provided on the small-diameter portion 14 and the large-diameter portion 1 provided on the container 2 side and having a larger diameter than the small-diameter portion 14.
3, a screw thread 20 is formed on the outer peripheral side of the small diameter portion 14, and a tool engaging surface 18 for engaging a tool such as a wrench is formed on the outer peripheral side of the large diameter portion 13. Thereby, even if the diameter of the screw thread 20 is reduced when the screw hole 19a of the panel 19 as the fluid measuring unit is small, the tool locking surface 18 is formed on the large-diameter portion 13 so that the tool locking surface 18 is formed. Since it can be formed sufficiently large, there is no need to use a special tool, and the screwing operation can be easily performed with a normal tool.

The fluid connection portion 12 is provided on the small-diameter portion 14 and the large-diameter portion 1 provided on the container 2 side and having a larger diameter than the small-diameter portion 14.
3, the screw thread 20 was formed on the outer peripheral side of the small-diameter portion 14, and the mounting recess 15 was formed on the inner peripheral side of the large-diameter portion 13. Thereby, even when the diameter of the screw thread 20 is small when the screw hole 19a of the panel 19 as the fluid measuring section is small, the mounting recess 15 can be formed relatively large, so that the cylindrical portion 6 inserted into the mounting recess 15 can be formed. Etc. can be easily manufactured.

A step portion 6 a was formed on the rear end side of the cylindrical portion 6, and a seal ring 17 was attached to the outer periphery thereof. The seal ring 17 sealed between the outer periphery of the cylindrical portion 6 and the inner periphery of the mounting recess 15. Thus, in a structure in which the container 2 and the fluid connection portion 12 are rotatable relative to each other, it is possible to prevent fluid leakage between the container 2 and the fluid connection portion 12 with a simple configuration. The seal ring 17 may be mounted on the outer peripheral surface of the stepped portion 6a before the cylindrical portion 6 is press-fitted into the mounting recess 15, so that the handling of the seal ring 17 becomes easy.

A tapered surface 16a whose ridge 16 is gradually reduced inward toward the depth of the mounting recess 15;
6a and a folded surface 16b which is folded at an acute angle. According to this configuration, the cylindrical portion 6 is easily guided by the tapered surface 16a and press-fitted. However, after the press-fitting, the folded surface 16b prevents the falling-off, so that the assembling work is easy and the mounting state is stable. It will be.

In addition to the above embodiment, for example, the following embodiment is also possible. In the above embodiment, the Bourdon tube 8 is used as a pressure detector constituting the measuring unit, but another pressure detector may be used.

In the above embodiment, the pressure gauge 1 is exemplified as the fluid measurement display. For example, a thermometer for measuring and displaying the temperature of the fluid, a hygrometer for measuring and displaying the humidity of the fluid, or a dew point of the fluid May be applied to a dew-point meter that measures and displays. Further, the present invention may be applied as a measurement display in which two or more of pressure measurement, temperature measurement, humidity measurement, and dew point measurement are appropriately combined.

The display unit may be applied to a digital type instead of an analog type using the hands 9 and the scale 11 indicated by the hands 9. -Although the thing which the whole container 2 turns and adjusts with respect to the fluid connection part 12 was illustrated, what is necessary is just what at least the display part turns and adjusts with respect to the fluid connection part 12.

The hexagonal bolt type tool engaging surface 18 is provided on the fluid connection portion 12, but it is sufficient that the tool engaging surface 18 is chamfered as required, such as a two-plane width. or,
The tool engagement surface 18 may be omitted, but if omitted, the screwing operation of the fluid connection portion 12 becomes more complicated than when the tool engagement surface 18 is formed.
It is preferable to form

The fluid connection part 12 is composed of the large diameter part 13 and the small diameter part 1
4, but may have the same diameter. In addition to the technical ideas described in the claims, the technical ideas grasped by the above-described embodiments are listed below together with their effects.

In the first or second aspect, the fluid connection portion includes a small-diameter portion and a large-diameter portion provided on the main body side of the small-diameter portion and having a larger diameter than the small-diameter portion. In addition, a tool engagement surface for engaging a tool was formed on the outer peripheral side of the large diameter portion. As a result, even if the diameter of the screw thread is small when the screw hole of the fluid measurement part is small, the tool engagement surface is formed in the large diameter part, so that it is not necessary to use a special tool, and the screwing operation can be performed in a normal manner. Easy to do with tools.

According to a fourth aspect of the present invention, the fluid connection portion comprises a small-diameter portion and a large-diameter portion provided on the main body side of the small-diameter portion and having a larger diameter than the small-diameter portion. The mounting recess was formed on the inner peripheral side of the large diameter portion. Accordingly, even when the diameter of the screw thread is small when the screw hole of the fluid measuring unit is small, the mounting recess can be formed relatively large, so that the manufacture of the cylindrical portion or the like inserted therein can be facilitated.

In claim 4, a step portion is formed on the outer peripheral side of the cylindrical portion, and a seal ring is attached to the step portion, and the seal ring seals between the outer periphery of the cylindrical portion and the inner periphery of the mounting recess. . Accordingly, in a structure in which the main body and the fluid connection portion are rotatable with each other, it is possible to prevent fluid leakage between the main body and the fluid connection portion with a simple configuration. Further, the seal ring may be mounted on the outer peripheral surface of the stepped portion before the cylindrical portion is press-fitted into the mounting concave portion, so that the handling of the seal ring becomes easy.

According to a fifth aspect of the present invention, the ridge is constituted by a tapered surface gradually decreasing inward toward the inner part of the mounting concave portion, and a folded surface turned back from the tapered surface at an acute angle. According to this configuration, the cylindrical portion is easily guided and press-fitted into the tapered surface, but after the press-fitting, the turning back surface prevents the falling off, so that not only the assembling work is easy but also the mounting state is stable. Become.

The technical terms used in the present specification are defined as follows. The term “fluid” refers to a single type of various gases such as oxygen, carbon dioxide, nitrogen, argon, and hydrogen, and various types of mixed gases such as air, which is a mixture thereof, as well as liquids such as water and oil, and critical gases. Including fluids.

[0057]

As described above in detail, according to the first and second aspects of the present invention, the fluid connection portion having a thread is screwed into the threaded hole formed in the fluid measurement portion, and the fluid is connected to the fluid connection portion. In the type in which the measurement display is mounted, the display can always be adjusted to a desired rotational position while preventing fluid leakage from the fluid connection and breakage of the fluid connection.

According to the invention described in claim 3, according to claim 1
Or, in addition to the effect of the invention described in claim 2, when the fluid connection portion is attached to the side surface, the vertical position of the display portion can be accurately adjusted.

According to the invention set forth in claim 4, according to claim 2
In addition to the effects of the invention described in the above, by providing a ridge for guiding and supporting the cylindrical portion of the main body in the circumferential direction in the mounting concave portion of the fluid connection portion, the main body can be prevented along the rotation direction when the fluid connection portion is screwed. By supporting the main body in an adjustable manner, the configuration for adjusting the main body can be simplified.

According to the invention set forth in claim 5, according to claim 4,
In addition to the effects of the invention described in the above, the ridge is made of a harder material than the cylindrical portion, and the cylindrical portion outer peripheral surface bites into the ridge by press-fitting the cylindrical portion into the mounting recess, and the cylindrical portion is in the bite state. By being supported by the ridge, the assembly is completed only by press-fitting the cylindrical portion into the mounting recess, so that the assembling work can be simplified in addition to the simplification of the configuration.

[Brief description of the drawings]

FIG. 1 is a sectional view of a pressure gauge.

FIG. 2 is an exploded perspective view of a pressure gauge.

FIG. 3 is a partial cross-sectional view showing a mounting state of a pressure gauge.

FIGS. 4A to 4C are front views each showing a rotation position of a display unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pressure gauge as a fluid measurement display, 2 ... Container as a main body, 6 ... Cylindrical part, 8 ... Bourdon tube which constitutes a pressure detector as a measuring part, 9, 11 ... Indicator and scale which constitute a display part , 12... Fluid connection, 14a.
Passages, 15 mounting recesses, 16 ridges, 20 thread.

Claims (5)

[Claims] 1. A thread formed in a cylindrical shape, an inner peripheral side of which is a flow path for inputting a fluid from the outside, and an outer peripheral side of which is screwed into a screw hole formed in a fluid measurement part. Fluid measurement comprising: a fluid connection portion formed with: a measurement portion configured to measure a state of a fluid input from a flow path of the fluid connection portion; and a display portion configured to display a measurement result of the fluid state measured by the measurement portion. A fluid measurement display, wherein the display unit can be continuously adjusted with respect to the fluid connection unit along a rotation direction when the fluid connection unit is screwed. 2. A thread formed in a cylindrical shape, an inner peripheral side of which is used as a flow path for inputting a fluid from the outside, and an outer peripheral side of which is screwed into a screw hole formed in a fluid measurement part. And a main body having a measuring unit for measuring the state of the fluid input from the flow path of the fluid connecting unit, and a display unit for displaying the result of measuring the state of the fluid measured by the measuring unit. The fluid measurement display provided, wherein the main body can be continuously adjusted with respect to the fluid connection portion along a rotation direction at the time of screwing the fluid connection portion. 3. The fluid measurement and display device according to claim 1, wherein a display surface of the display unit is provided on a surface substantially orthogonal to an axial direction of the fluid connection unit. 4. A mounting recess is formed on the body side of the fluid connection portion, and a cylindrical portion inserted into the mounting recess is integrally provided on the fluid connection portion side of the body, and the cylindrical portion is provided in the mounting recess. A ridge for guiding and supporting in the circumferential direction is provided, fluid is supplied to the measurement unit via the inner peripheral side of the fluid connection part and the inner peripheral side of the cylindrical part, and the ridge is used to rotate the main body when the fluid connection part is screwed. The fluid measurement indicator according to claim 2, wherein the fluid measurement indicator is supported so as to be continuously adjustable along the direction. 5. The ridge is made of a harder material than the cylindrical portion, and the cylindrical portion is pressed into the mounting recess so that the outer peripheral surface of the cylindrical portion bites into the ridge, and the cylindrical portion projects in the bite state. 5. The fluid measurement indicator according to claim 4, wherein the fluid measurement indicator is supported by a strip.