JP2557828Y2 - Structure of fluid connection part in condition measuring device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a fluid connection in a condition measuring device.

[0002]

2. Description of the Related Art Generally, state measuring devices such as a pressure gauge, a hygrometer, and a thermometer are used to detect and manage a pressure state, a humidity state, a temperature state, and the like of a fluid. The state measuring device is provided with a fluid connection portion connected to a fluid piping, and a fluid is input into the state measurement device via the fluid connection portion.

Conventionally, as means for connecting the pipe line and the fluid connection portion, a fluid connection portion is formed in a cylindrical shape and a thread is formed on the outer periphery thereof, and a connection pipe extending from the pipe line is formed. It is screwed.

In recent years, flexible tubes have been widely used, and in response to this, ones in which a one-touch type pipe joint is applied to a fluid connection portion have been used. In the one-touch type pipe joint, when the flexible tube is inserted into the joint, the claw portion is inserted into the flexible tube to prevent the flexible tube from coming out. Further, the penetration of the flexible tube and the claw portion can be released by pushing in the release cylinder (for example, see Japanese Utility Model Laid-Open No. 4-107590).

[0005]

However, in the conventional state measuring device, whether a thread is formed on the outer periphery of the fluid connection portion or whether the fluid connection portion is constituted by a one-touch type pipe joint. It was dedicated to one or the other.

For this reason, it is necessary to manufacture each of the condition measuring devices having the same structure, fluid connection portion, even if the performance measuring device itself has the same performance, design and size. As a result, the number of product types of the state measuring device increases, so that there is a problem that the product management becomes very troublesome for the manufacturer side, and as a result, the cost increases. In addition, there is a problem that it is inconvenient for the user because a different state measuring device must be used depending on the state of the pipe line, for example, whether or not fluid is input from the flexible tube.

The present invention has been made in view of the above circumstances, and its purpose is to provide a fluid connection portion with two types of connection functions, thereby reducing the number of product types for the manufacturer and facilitating product management. It is another object of the present invention to provide a state measuring device which can reduce costs as a result, eliminate the restrictions on design for the user side, and improve convenience at the time of purchase.

[0008]

In order to achieve the above object, according to the present invention, a base end of a cylindrical fluid connection portion for inputting a fluid from the outside is connected, and a distal end side of the fluid connection portion is connected to the fluid connection portion. In a state measuring device for measuring a state of a fluid that has been input, a mounting recess opening at a distal end side is formed inside the fluid connection portion, and a pipe is provided in the mounting recess. A joint member is provided, wherein the pipe joint is a sealing member that seals an outer periphery of a tube inserted from a distal end side of the mounting concave portion, and a locking member that locks the tube in a state sealed by the sealing member. , and a release member for releasing the engagement between the locking member and the tube, further, on the outside of the fluid connection is fluid contact
A thread was formed for screwing the continuation portion into the screw hole from the tip side .

[0009]

According to the above structure, when a flexible tube or the like is connected to the fluid connecting portion, if the flexible tube is inserted from the upstream side of the mounting recess, the flexible tube does not leak fluid due to the sealing member. As sealed. In this sealed state, the flexible tube is locked by the locking member to prevent the flexible tube from falling out of the fluid connection portion. When the release member is operated, the locking between the flexible tube and the locking member is released, and the flexible tube is detached from the fluid connection portion.

When a fluid connection is connected to a pipe having a screw hole, the connection is made using a thread formed on the outer periphery of the fluid connection.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment in which the state measuring device of the present invention is embodied in a panel mount type pressure gauge will be described below with reference to FIGS.

As shown in FIGS. 1 and 2, the container 2 of the pressure gauge 1 is formed in a substantially rectangular cylindrical shape with an open front surface, and a transparent window 3 is fitted and fixed to the front surface thereof, while The cover plate 4 is fastened and fixed by screws (not shown).

A mounting plate 5 is provided in the container 2 so as to extend parallel to and close to the transparent window 3. A Bourdon tube type pressure detector 6 is attached to the rear surface of the mounting plate 5. At the front of the mounting plate 5, an analog pressure display 7 is provided. The pressure indicator 7 comprises a pointer 8 connected to the pressure detector 6 and a scale 9 provided on the front surface of the mounting plate 5 corresponding to the pointer 8.

A panel mounting plate P formed so as to surround the transparent window 3 is provided on the front surface of the container 2, and the panel mounting plate P is detachably mounted with two screws N. I have. Therefore, when using the pressure gauge 1 by panel mounting, the panel mounting plate P is removed by removing the screw N, and a panel (not shown) is interposed between the panel mounting plate P and the front surface of the container 2. In this state, the panel mounting plate P is screwed again with the screw N.

A through hole 4a is formed in the center of the cover plate 4, and a fluid connection portion 10 is fixed to the through hole 4a. The fluid connection unit 10 is connected to the pressure detector 6, and the pointer 8 swings according to the pressure of the fluid to be detected input to the pressure detector 6 via the fluid connection unit 10.

Next, the structure of the fluid connection part 10 will be described with reference to FIGS.
A description will be given based on FIG. The connection part main body 11 of the fluid connection part 10 is formed in a cylindrical shape. A mounting recess 12 is formed on the entrance side of the connection portion main body 11, and the mounting recess 12 is composed of a large diameter portion 12a and a small diameter portion 12b. A sealing thing 13 having elasticity as a sealing member is fitted into the inner end of the large diameter portion 12a. The inner diameter of the seal ring 13 is formed slightly smaller than the outer diameter of the flexible tube 14 as a tube. On the upstream side (upper side in FIG. 3) of the sealing member 13, a hollow cylindrical guide tube 15 is fitted into the sealing ring 13 so as to be in a non-slidable state.

A release cylinder 16 as a release member is inserted into the guide cylinder 15 so as to be movable in the direction of the axis L of the connecting portion main body 11. The release cylinder 16 is formed in a hollow cylindrical shape, and has an inner diameter of the flexible tube 14.
Is set slightly larger than the outer diameter of. Engagement ridges 16a are formed on the entire outer peripheral surface of the inner end of the release cylinder 16, and tapered surfaces 16b are formed on the engagement ridges 16a such that the diameter decreases toward the back. A finger contact portion 17 is formed on the entire outer peripheral surface of the release cylinder 16. The outer diameter of the finger rest 17 is set to be substantially the same as the diameter of the large diameter part 12a or slightly smaller than the diameter of the large diameter part 12a. Are accommodated in the large diameter portion 12a, and a part of the finger contact portion 17 is exposed to the upper side.

A chuck holder 18 is fitted on the inner periphery of the guide tube 15 at the inner end thereof. That is, a step 18 a is formed on the outer periphery of the chuck holder 18, and the step 18 a is fitted on the inner peripheral surface of the guide cylinder 15. A downwardly inclined stopper surface 18 b is formed on the inner peripheral surface of the chuck holder 18. A plurality (eight in this embodiment) of which the locking ridge 16a is locked at the outer end of the chuck holder 18.
The locking projections 18c are protruded. Therefore, the locking projection 16a and the locking projection 18c are locked, so that the release cylinder 16 is restricted from moving further upstream.

An annular chuck 19 as a locking member is mounted on the chuck holder 18. That is, the annular chuck 19 includes a tubular portion 19a on the base end side thereof, and the tubular portion 19a is placed on the step portion 18a. Tubular part 19
The upstream side of “a” extends toward the inlet side of the mounting recess 12 and toward the axis L, and is then bent and inverted to the rear side. The bent surface is the affected surface 19 b having an upwardly inclined surface and the affected surface having a downwardly inclined surface. 19c constitutes an annular actuated convex surface.
At the tip of the annular chuck 19, a plurality (8 in this embodiment)
Are formed in a circumferentially arrayed manner in the affected surface 19c having a downward slope. The radius of the circle formed by the tip edges of the claws 19d is set slightly smaller than the outer diameter of the flexible tube 14 in the free state of FIG. The claws 19d are inserted between the locking projections 18c of the chuck holder 18, respectively. Accordingly, when the release cylinder 16 is pressed, the tapered surface 16b presses the downwardly-sloped affected surface 19c of the annular chuck 19, and the claw portions 19d are expanded.

The pipe joint A of this embodiment is constituted by the seal ring 13, the guide cylinder 15, the release cylinder 16, the chuck holder 18, the annular chuck 19 and the like. A male screw 20 is formed on the outer periphery of the connection portion main body 11.

Next, the operation of the pressure gauge 1 configured as described above will be described. First, flexible tube 1
4 is connected to the fluid connection unit 10.
Now, as shown in FIG. 5, when the flexible tube 14 is inserted into the release tube 16 and pushed in, the distal end of the flexible tube 14 comes into contact with the downwardly inclined affected surface 19 c of the annular chuck 19. And flexible tube 14
19d of the annular chuck 19 by the pushing action of
Expands.

When the flexible tube 14 is further pushed in, the flexible tube 14 passes while being in close contact with the sealing sheath 13, and the distal end of the flexible tube 14 contacts the deepest end of the small diameter portion 12 b of the mounting recess 12.
In this state, the claw portion 19d of the annular chuck 19 gets into the outer peripheral surface of the flexible tube 14, and the attachment of the flexible tube 14 to the fluid connection portion 10 is completed.

When the pressurized fluid is supplied from the flexible tube 14 in this state, the release cylinder 16 jumps out slightly upward as shown by a two-dot chain line in FIG.
Receives the pressurized fluid and further improves the adhesion of the seal ring 13 to the flexible tube 14 and the mounting recess 12, so that there is no possibility of fluid leakage.

When the flexible tube 14 is to be removed from the fluid connection portion 10, as shown in FIG. 6, a finger is pressed against the finger contact portion 17 and pushed in the direction of the arrow in FIG. 12a. Then, the tapered surface 16b of the release cylinder 16 comes into contact with the acted surface 19c of the annular chuck 19, and is further pushed into the annular chuck 1
The nine claw portions 19d are expanded. Thereby, the biting of each claw portion 19d into the flexible tube 14 is released, and the flexible tube 14 can be pulled out from the pipe joint.

Next, as shown in FIG. 7, a case will be described in which the pressure gauge 1 is used for detecting, for example, the output pressure of a pressure regulating valve 21. The pressure adjusting valve 21 is provided with a pressure extracting portion 22. The pressure extracting portion 22 has a pressure extracting port 2 communicating with a flow path 21 a of the pressure adjusting valve 21 main body.
2a is formed. A female screw hole 2 communicating with the pressure outlet 22a is further provided on the outer end side of the pressure outlet 22a.
2b is formed.

The pressure gauge 1 is attached to the pressure regulating valve 21 by screwing the fluid connection portion 10 having an external thread 20 formed on the outer periphery into the female screw hole 22b. In this state, since the finger contact portion 17 of the release cylinder 16 is immersed in the large-diameter portion 12a, the mounting of the pressure gauge 1 does not become incomplete.

Therefore, in the present embodiment, since the pipe joint A is provided inside the fluid connection portion 10 and the external thread 20 is formed on the outer periphery of the fluid connection portion 10, the flexible tube 1 is provided.
4 and a pipe having a female screw hole 22b. As a result, it is possible for the manufacturer to reduce the number of product types and consequently to reduce the cost and to facilitate the product management. In addition, it is possible to eliminate restrictions on design for the user and improve convenience in purchasing.

Further, since the external thread 20 is formed on the outer periphery of the fluid connection portion 10 and the pipe joint A is provided inside, the flow path in the pipe joint A becomes smaller as compared with the conventional fluid connection portion. Since the pressure gauge 1 does not require a fluid flow, there is no possibility that the detected pressure becomes inaccurate.

It should be noted that the present invention is not limited to the above embodiment, but can be implemented in the following modes. (1) In the above embodiment, the pressure gauge 1 is exemplified as the state measuring device. However, as shown in FIG. That is, the mounting plate 5 is provided in the hygrometer 30. A scale 31 of 0 to 100% indicating humidity is provided on the front surface of the mounting plate 5, and the pointer 32 swings according to the humidity at that time by a pointer 32 connected to a humidity detector (not shown). This hygrometer 3
In the same manner as in the previous embodiment, a male screw 20 is formed on the outer periphery and a fluid connection portion 10 in which a pipe joint A is provided is provided at 0. Although not shown, it is also possible to use a thermometer or the like. Since the flow of fluid is not required in the hygrometer, the thermometer and the like, even if the flow path in the pipe joint A is small, there is no possibility that the detected humidity and temperature become inaccurate.

(2) In the above embodiment, the pressure display unit 7 and the humidity display unit such as the pressure gauge 1 and the hygrometer 30 have been exemplified by the analog type using the hands 8 and 32. It may be.

(3) The shape of the pipe joint A is not limited to the one described in the above embodiment, and various conventionally known joints can be used. (4) The shape of the fluid connection portion 10 is not limited to a cylindrical shape, but may be another shape such as a square tube shape.

[0032]

[Effect of the Invention] As described in detail above, according to the present invention,
The fluid connection has two types of connection functions,
For the manufacturer, it has the advantage of reducing product types and facilitating product management as well as reducing costs, and for the user side, eliminating design constraints and improving purchasing convenience. To play.

[Brief description of the drawings]

FIG. 1 is a front view of a pressure gauge according to an embodiment of the present invention.

FIG. 2 is a partial sectional view of a pressure gauge.

FIG. 3 is a sectional view of a fluid connection part.

FIG. 4 is an exploded perspective view of a chuck holder and a chuck of a fluid connection unit.

FIG. 5 is a cross-sectional view showing a state where a flexible pipe is connected to a fluid connection part.

FIG. 6 is a cross-sectional view showing a state where a flexible pipe is removed from a fluid connection part.

FIG. 7 is a partially cutaway side view showing a state where a fluid connection portion is screwed into the pressure regulating valve.

FIG. 8 is a front view of a hygrometer according to another example of the present invention.

[Explanation of symbols]

1, 30 ... pressure gauge, hygrometer as state measuring device, 10
... Fluid connection portion, 12 ... Mounting recess, 13 ... Seal ring as seal member, 14 ... Flexible tube as tube, 16 ... Release cylinder as release member, 19 ... Circular chuck as lock member, 20 ... Screw Mountain, L ... axis.

Claims (1)

(57) [Scope of request for utility model registration] 1. A state in which the proximal end of a cylindrical fluid connection (10) for inputting a fluid from the outside is connected, and the state of the fluid input from the distal end of the fluid connection (10) is measured. In the measuring device, an opening is provided inside the fluid connection part (10) on the tip side.
And a fitting (A) is provided in the fitting recess (12), and the fitting (A) is inserted into the fitting from the distal end of the fitting recess (12). (14) a sealing member (13) for sealing the outer periphery, and the pipe (14) is connected to the sealing member (1).
Locking member (1) that locks in a state sealed by 3)
9), the engagement with the stop member (19) tube between a release member (16) to release the locking (14), further fluid connections to the outside of the fluid connection (10)
Part (10) is screwed into the screw hole (22b) from the tip side
Of a fluid connection in a condition measuring device, wherein a thread (20) for forming the thread is formed.