JP7078379B2 - Connecting members, fluid equipment connection jigs and fluid equipment connection structures - Google Patents

Description

The present invention relates to a first fluid device having a first connecting portion, a second fluid device having a second connecting portion, an annular seal member connecting the first connecting portion and the second connecting portion, the first connecting portion, and the first connecting portion. It relates to a connecting member used in a fluid device connecting structure having a connecting member for maintaining a connected state of the second connecting portion.

Conventionally, valves such as flow control valves and on-off valves, sensors such as filters, pressure sensors and flow sensors, joint blocks and flow path blocks, etc. have been used to control chemicals used in semiconductor manufacturing processes and liquid crystal manufacturing processes. Fluid equipment such as piping blocks is used. In recent years, in order to make the device compact, the connecting portions of these fluid devices are directly connected to each other by using a connecting member to form a unit.

FIG. 33 is a cross-sectional view of the connecting member 106 of the conventional fluid equipment connection structure in a normal use state. FIG. 34 is a cross-sectional view of the connecting member 106 of the conventional fluid equipment connection structure in a retightened state.
As shown in FIG. 33, the connecting member 106 is configured by engaging both ends of the first connecting piece 107 and the second connecting piece 108. One end (first engaging portion) of the first connecting piece 107 and the second connecting piece 108 is rotatably engaged via the support shaft 111. On the other hand, the other ends (second engaging portion) of the first connecting piece 107 and the second connecting piece 108 have the locking claw 108e projecting from the first extending portion 108c of the second connecting piece 108 as the first connecting piece. The connection state is maintained by inserting the locking claw 108e into the insertion hole 107e formed in the second extension portion 107c of the 107 while elastically deforming it, and then restoring the locking claw 108e to lock it in the second extension portion 107c. .. This connection state is a normal use state in which the connection portions are connected to each other by the connection member 106.

The connecting portion, the annular seal member, and the first and second connecting pieces 107 and 108 are made of resin. Therefore, for example, when an abnormally high temperature chemical solution and an abnormally low temperature pure water are alternately applied to the connection portion for a long period of time, the connection portion may be creep-deformed and the sealing force may be lowered. When the sealing force is reduced, liquid leakage occurs. In such an emergency, retightening is performed.

A retightening member 110 for increasing the sealing force by bringing the first and second connecting pieces 107 and 108 close to each other to attract the connecting portions to each other is attached to the connecting member 106.
By inserting the retightening member 110 into the insertion hole 107d of the first connecting piece 107 and tightening it into the bolt hole 108d of the second connecting piece 108, the first and second connecting pieces 107 and 108 are attracted to each other. Get closer. Therefore, the connecting member 106 can be tightened by using the retightening member 110 to improve the sealing force.

Japanese Patent No. 5134573 Japanese Patent No. 4575973

However, the conventional connecting member 106 has the following problems.
In the connecting member 106, as shown in FIG. 33, the support shaft 111 for keeping the first connecting piece 107 and the second connecting piece 108 integrated, and the radial outside for keeping the connecting member 106 closed. Since the first extension portion 108c and the second extension portion 107c formed in the above are provided, the connecting member 106 itself becomes large.
Alternatively, since the second engaging portion for retightening as a safety mechanism is provided on the outer side in the radial direction, the connecting member 106 itself becomes large. This requires a large work space for mounting the connecting member 106.

Alternatively, as shown in FIG. 35, when a large number of fluid devices are installed in parallel on the installation surface 300, the work space of the central fluid device is limited to the side opposite to the installation surface 300, and the conventional connecting member 106 Then, when the connecting member 106 is attached to the fluid devices on both sides, the first connecting piece 107 and the second connecting piece 108 of the connecting member 106 cannot be brought close to each other and closed. Even if the connecting member 106 is attached, the locking claw 108e cannot be engaged because the hand is put in from the direction opposite to the insertion direction to put it in the normal use state, and the tightening state is set. However, since it is not possible to work in a narrow space where the hands cannot be reached all the way, there is a problem that workability deteriorates.

The present invention is intended to solve the above problems, and an object of the present invention is to provide a fluid device connection structure having good workability and which can be installed in a narrow space.

The fluid device connection structure of the present invention has the following configuration in order to solve the above problems.
(1) A first fluid device having a first connection portion, a second fluid device having a second connection portion, an annular seal member arranged between the first connection portion and the second connection portion, and an annular seal member. In a connecting member used in a fluid device connecting structure having a connecting member for connecting a first connecting portion and a second connecting portion via a connecting member, the connecting member includes a first connecting piece and a second connecting piece, and is a first. The connecting piece and the second connecting piece have a rotating connecting part at one end, the outer shape of the first connecting part and the second connecting part is circular, and the first connecting piece has an approximately U-shape having an opening. It is engaged with the second connecting piece by exceeding 180 degrees around the entire circumference of the first connecting portion and the second connecting portion, and a T-shaped or L-shaped detachable locking is applied to the outer periphery of the first connecting piece. It is characterized in that a portion is formed .

(2) A first fluid device having a first connection portion, a second fluid device having a second connection portion, an annular seal member arranged between the first connection portion and the second connection portion, and an annular seal. In a connecting member used in a fluid device connecting structure having a connecting member for connecting a first connecting portion and a second connecting portion via a member, the connecting member includes a first connecting piece and a second connecting piece, and the first connecting piece is provided. The 1st connecting piece and the 2nd connecting piece have a rotating connecting part at one end, the outer shape of the 1st connecting part and the 2nd connecting part is circular, and the 1st connecting piece has an opening. It is a shape and engages with the second connecting piece beyond 180 degrees around the entire circumference of the first connecting portion and the second connecting portion, and the first connecting portion and the second connecting portion are the annular seal member. The first connecting piece and the second connecting piece are characterized by having a protrusion that engages with the first connecting portion and the second connecting portion, respectively.
(3) In the connecting member according to (1) or (2), the size of the opening is formed to be smaller than the diameter of each tubular portion of the first connecting portion and the second connecting portion. The connecting piece is characterized in that it can be deformed so as to extend from the diameter of each tubular portion of the first connecting portion and the second connecting portion to the outside of the difference in the size of the opening.

(4) The connecting member according to any one of (1) to (3) is characterized in that a thin portion having a notch is formed in the first connecting piece.
(5) In the connecting member according to any one of (1) to (4), the position facing the outer peripheral portion of the first connecting portion of the first connecting piece and the second connecting portion of the first connecting piece. A convex protrusion is formed at a position facing the outer peripheral portion, or a position facing the outer peripheral portion of the first connecting portion of the second connecting piece, and a second connecting portion of the second connecting piece. A convex protrusion is formed at a position facing the outer peripheral portion, and at least one of the convex protrusion of the first connecting piece and the convex protrusion of the second connecting piece is the first connecting portion and the convex protrusion of the second connecting piece. It is characterized in that it is pressed outward in the radial direction by the second connecting portion.

(6) In the connecting member according to any one of (1) to (5), the rotation connecting portion of the first connecting piece and the second connecting piece has a resistance generating portion for preventing its own weight rotation. Is formed.
(7) In the connecting member according to any one of (1) to (6), a rotating acting portion is formed on the outer periphery of the second connecting piece, and the rotating acting portion is described as the first. By pushing the connecting piece from the same direction as the first connecting portion and the second connecting portion, the second connecting piece can be rotated so that the first connecting piece and the second connecting piece come close to each other. And.
(8) In the connecting member according to any one of (1) to (7), the other end of the first connecting piece includes a first locking portion, and the other end of the second connecting piece is the first. A first locking receiving portion for locking the locking portion is provided, the connecting member is positioned at the first locking position where the first locking portion and the first locking receiving portion engage, and the connecting member is , There is a second locking position closer to the annular seal member direction than when it is in the first locking position, the first locking position is in normal use, and the second locking position is increased. It is in the tightened state, and the retightened state is obtained by applying a force to the second connecting piece in a direction facing the direction in which the first connecting piece is attached to the first connecting portion and the second connecting portion.
It is characterized by.

(9) In the fluid equipment connecting jig used for the connecting member according to any one of (1) to (8), the fluid equipment connecting jig is attached to the connecting member for retightening. It is characterized by showing a state.
(10) In the fluid equipment connecting jig used for the connecting member according to any one of (1) to (8), the first connecting piece has a second jig hooking portion formed on the outer peripheral surface thereof. The second connecting piece has a first jig hooking portion formed on the outer peripheral surface, and the fluid device connecting jig has a common hooking portion that engages with the first jig hooking portion and a second jig. The jig hooking portion is provided with a first locking position hooking portion and a second locking position hooking portion, and the first locking position hooking portion and the second locking position hooking portion are fluid devices. It is characterized in that it is formed at both ends of a rotating member rotatably held by a connecting jig.
(11) In the fluid equipment connecting jig used for the connecting member according to any one of (1) to (8), the fluid equipment connecting jig connects the connecting member to the first connecting portion and the second connecting portion. It is characterized in that the first connecting piece and the second connecting piece are engaged by being inserted from the same direction as the mounting direction.

(12) A fluid device connection structure including the connecting member according to any one of (1) to (8).

The fluid device connection structure of the present invention has the following actions and effects.
According to the configuration of (1) above, the first connecting piece has an approximately U-shape having an opening, and the first connecting piece exceeds 180 degrees around the entire circumference of the first connecting portion and the second connecting portion. Since the two connecting pieces are engaged with each other, the engaging portion is not installed on the radial side of the connecting member, and the connecting member itself is compactly formed. Therefore, even when tubular portions or wall surfaces are adjacent to each other and there is no space for installing a large number of fluid devices in parallel, they can be installed and workability is good.

According to the configuration of (2) above, the size of the opening of the first connecting piece is formed to be smaller than the diameter (outer diameter) of each tubular portion of the first connecting portion and the second connecting portion, and the first connecting portion is formed. Since the piece can be deformed so as to extend outward from the diameter (outer diameter) of each tubular portion of the first connection portion and the second connection portion to the outside of the difference in the size of the opening, the piece can be used as the first connection portion and the second connection portion. When mounting, the first connecting piece spreads outward by a certain length and can be fitted into the first connection part and the second connection part for temporary fixing, so it is difficult to remove even if its own weight or external force is applied after fitting. Good sex.

According to the configuration of (3) above, since a thin portion having a notch is formed in the first connecting piece, when the first connecting piece is attached to the first connecting portion and the second connecting portion, the first connecting piece is attached. Since the thin part causes elastic deformation of appropriate strength, the opening is widened, and the opening is closed after installation, the operator can install it with an appropriate wearing force and feel an appropriate wearing feeling, and after mounting. Is hard to come off and has good workability.

According to the configuration of (4) above, a portion that does not come into contact with the first connecting portion and the second connecting portion is formed on the inner peripheral surface of the resistance generating portion of the first connecting piece and the second connecting piece and the second connecting piece. Therefore, the second connecting piece does not interfere with the first connecting portion and the second connecting portion. In addition, since there is a range in which it can rotate freely, frictional resistance is generated there, so the position of the second connecting piece is worked from the time the first connecting piece is attached until the second connecting piece is engaged. It can be temporarily fixed in a position where it is easy to work, and workability is good.

According to the configuration of (5) above, since the detachable locking portion is formed on the outer periphery of the first connecting piece, the detachable locking portion can be pinched, and the jig is engaged with the detachable locking portion. Workability is good because the connecting member can be easily attached and detached by pressing and pulling.

According to the configuration of (6) above, since the rotating action portion is formed on the outer periphery of the second connecting piece, the connecting member is attached to the rotating action portion on the first connecting portion and the second connecting portion. By applying a load from the same direction as the direction, the second connecting piece can be rotated, and workability is good.

According to the configuration of (7) or (8) above, the following effects are exhibited. That is, the tip of the first locking portion of the first connecting piece and the tip of the first locking receiving portion of the second connecting piece are usually in contact with each other and engaged with each other. However, due to the tolerance of the first connecting piece and the second connecting piece, there is a possibility that a gap is generated between the tip and the tip and cannot be meshed with each other. The condition does not affect the sealing force, but the user may feel that the mounting is not completed. According to the configuration of (7) above, the convex shape is formed at a position facing the outer peripheral portion of the first connecting portion of the first connecting piece and a position facing the outer peripheral portion of the second connecting portion of the first connecting piece. It is characterized in that a protrusion is formed, and further, according to the configuration of (8) above, a position facing the outer peripheral portion of the first connection portion of the second connecting piece and a second connection of the second connecting piece. Since a convex protrusion is formed at a position facing the outer peripheral portion of the portion, the first connecting piece and the second connecting piece are formed by the first connecting portion and the second connecting portion. Since it is pressed outward in the radial direction, there is no gap between the tip portions and the meshing can be performed reliably.
According to the configuration of (9) or (10) above, when an abnormally high temperature chemical solution and an abnormally low temperature pure water are alternately added to the connection portion for a long period of time, the sealing force is lowered and liquid leakage occurs. Since there are a first locking position and a second locking position, the bonding force between the first connecting portion and the second connecting portion can be obtained by setting the second locking position closer to the annular seal member direction. It is possible to take immediate action when a liquid leak occurs.

According to the configuration of (11) above, by using the fluid device connecting jig, the first connecting piece and the second connecting piece are connected to both the first locking position and the second locking position. Can be done.

According to the configuration of (12) above, the fluid equipment connecting jig is inserted from the same direction as the direction in which the connecting member is attached to the first connecting portion and the second connecting portion, and the first connecting piece and the second connecting piece are engaged. Since it can be combined, it is possible to work from only one direction, and it is easy to work even in a narrow space where many fluid devices are installed in parallel, and workability is good.

According to the configuration of (13) above, since the fluid device connecting jig is attached to the connecting member, it can be easily confirmed from the outside that the retightening state is achieved, so that it can be easily confirmed at a glance at the time of maintenance. It is possible to find and handle fluid equipment in a retightened state, and workability is good.

It is a perspective view of the connecting member in the 1st locking position. It is a perspective view of the connecting member in the 1st locking position. It is a perspective view of the connecting member in the 1st locking position. It is a perspective view of the connecting member in the 1st locking position. It is a perspective view of the connecting member in the state before engaging. FIG. 1 is a cross-sectional view taken along the line AA of FIG. FIG. 5 is a sectional view taken along line BB in FIG. It is a figure which shows the relationship between a connecting member and a fluid device. It is a front view which shows the state which the connecting member is attached with the fluid equipment installed in parallel. It is a perspective view of the fluid equipment connection jig. FIG. 10 is a cross-sectional view taken along the line CC of FIG. (A) It is an exploded view of the 1st fluid device, the 2nd fluid device, and an annular seal member. (B) Shows a state in which the first fluid device, the second fluid device, and the annular seal member are connected. (C) Shows a state in which the connecting member is inserted into the connected state of the first fluid device, the second fluid device, and the annular seal member. (D) The state in which the connecting member is in the first locking position is shown in the connected state of the first fluid device, the second fluid device, and the annular seal member. (A) It is a perspective view which shows the state before engaging a connecting member by a jig. (B) It is a perspective view which shows the state in the process of engaging a connecting member by a jig. (C) It is a perspective view which shows the state which the connecting member was set to the 1st locking position by a jig. It is a perspective view of the state where the connecting member is set to the 2nd locking position by the jig. (A) It is a front view which shows the state before engaging a connecting member by a jig. (B) It is a front view which shows the state in the process of engaging a connecting member by a jig. (C) It is a front view which shows the state which the connecting member was set to the 1st locking position by a jig. The enlarged view of part E of FIG. 15 is shown. It is a front view which shows the state which the connecting member was set to the 2nd locking position by the jig. (A) It is a partial cross-sectional view which shows the state before engaging a connecting member by a jig. (B) It is a partial cross-sectional view which shows the state in the middle of the 1st process of engaging a connecting member by a jig. (C) It is a partial cross-sectional view which shows the state in the middle of engaging a connecting member by a jig. (D) It is a partial cross-sectional view which shows the state which the connecting member was set to the 1st locking position by a jig. (A) It is a partial cross-sectional view which shows the state in the process of making a connecting member into a 2nd locking position by a jig. (B) It is a partial sectional view which shows the state which the connecting member was set to the 2nd locking position by the jig. It is a front view which attaches the connecting member with the fluid equipment installed in parallel. (A) It is a perspective view which shows the state which the jig was hooked on the connecting member at the time of removing a connecting member. (B) It is a perspective view which shows the state which pulled the jig and removed the connecting member. (A) It is a front view which shows the state which the jig was hooked on the connecting member at the time of removing a connecting member. (B) It is a front view which shows the state which pulled the jig and removed the connecting member. 12 is a cross-sectional view taken along the line DD of FIG. 12 (d). It is the K part enlarged view of FIG. 23. It is a top view which shows the state which attached the connecting member with the fluid equipment installed in parallel. It is a front view of the connecting member. It is a rear view of a connecting member. It is a top view of the connecting member. It is a bottom view of a connecting member. It is a left side view of a connecting member. It is a right side view of a connecting member. It is a perspective view of a connecting member. It is sectional drawing of the connecting member in the 1st locking position of the conventional fluid equipment connection structure. It is sectional drawing of the connecting member in the 2nd locking position of the conventional fluid equipment connection structure. It is a front view which shows the state which attaches the conventional connecting member with the fluid equipment installed in parallel. It is sectional drawing of the 1st connection piece of another embodiment. It is sectional drawing of the 2nd connecting piece of another embodiment. It is an enlarged view of the part I of FIG. 36. FIG. 38 is a cross-sectional view taken along the line RR of FIG. 38. It is the J part enlarged view of FIG. FIG. 4 is a sectional view taken along the line TT of FIG. 40. It is an enlarged view of the Q part of FIG. 37. It is a cross-sectional view of UU of FIG. 42.

The fluid device connection structure 1 of the present invention will be described in detail below with reference to the drawings. 1 to 4 show perspective views of the connecting member 5 in the first locking position at various angles. FIG. 5 shows a perspective view of the connecting member 5 in a state before being engaged. 6 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. 7 is a cross-sectional view taken along the line BB of FIG. FIG. 8 shows the relationship between the connecting member 5 and the first fluid device 2. FIG. 9 is a front view showing a state in which a connecting member is attached to fluid devices installed in parallel.
In FIG. 12, (a) shows an exploded view of the first fluid device 2, the second fluid device 3, and the annular seal member 4. (B) shows a state in which the first fluid device 2, the second fluid device 3, and the annular seal member 4 are connected. (C) shows a state in which the connecting member 5 is inserted into the connected state of the first fluid device 2, the second fluid device 3, and the annular seal member 4. (D) shows a state in which the connecting member 5 is in the first locking position in the connected state of the first fluid device 2, the second fluid device 3, and the annular seal member 4.
In FIG. 13, (a) is a perspective view showing a state before engaging the connecting member 5 with the jig 8. (B) is a perspective view showing a state in which the connecting member 5 is engaged with the jig 8. (C) is a perspective view showing a state in which the connecting member 5 is set to the first locking position by the jig 8. FIG. 14 is a perspective view showing a state in which the connecting member 5 is set to the second locking position by the jig 8. Here, the first locking position of the connecting member 5 indicates a normal use state, and the second locking position indicates a retightening state. 15 corresponds to FIG. 13, and FIGS. 15 (a) to 15 (c) show front views of FIGS. 13 (a) to 13 (c). FIG. 16 shows an enlarged view of part E of FIG. FIG. 17 corresponds to FIG. 14 and shows a front view of FIG.

In FIG. 18, (a) is a partial cross-sectional view showing a state before engaging the connecting member 5 with the jig 8. (B) is a partial cross-sectional view showing a first halfway state in which the connecting member 5 is engaged with the jig 8. (C) is a partial cross-sectional view showing a second halfway state in which the connecting member 5 is engaged with the jig 8. (D) is a partial cross-sectional view showing a state in which the connecting member 5 is set to the first locking position by the jig 8. In FIG. 19, (a) is a partial cross-sectional view showing a state in which the connecting member 5 is in the process of being set to the second locking position by the jig 8. (B) shows a state in which the connecting member 5 is set to the second locking position by the jig 8 in a partial cross-sectional view.
In addition, in FIGS. 13 to 19, in order to show the relationship between the connecting member 5 and the jig 8 more clearly, the drawings of the first fluid device 2, the second fluid device 3, and the annular seal member 4 are omitted. Further, in FIGS. 18 and 19, in order to clearly show the operation of the jig 8, the drawings of the recesses 6b and 7a of the connecting member 5 are omitted. FIG. 20 shows a front view in which a connecting member is attached with fluid devices installed in parallel.
Note that the connecting member 5 of FIGS. 26 to 31 shows a six-view view of the connecting member 5 of FIGS. 1 to 4. Specifically, FIG. 26 is a front view of the connecting member 5, FIG. 27 is a rear view, FIG. 28 is a plan view, FIG. 29 is a bottom view, and FIG. 30 is a left side view. FIG. 31 is a right side view. The connecting member 5 of FIG. 32 shows a perspective view of the connecting member 5 of FIGS. 1 to 4. However, the connecting member 5 of FIGS. 26 to 32 is different from the connecting member 5 of FIGS. 1 to 4 in that the connecting member 5 of FIGS. 26 to 32 is chamfered as a whole.

(Structure of fluid equipment connection structure)
First, the overall configuration of the fluid device connection structure 1 will be described with reference to FIG. 23. FIG. 23 is a cross-sectional view taken along the line DD of FIG. 12 (d). FIG. 24 is an enlarged view of the K portion of FIG. 23.
As shown in FIG. 23, in the fluid device connection structure 1, the first connection portion 21 of the first fluid device 2 and the second connection portion 31 of the second fluid device 3 are connected via the annular seal member 4. There is. A connecting member 5 is attached to the outer periphery of the first connecting portion 21 and the second connecting portion 31 to maintain the connected state. The connecting member 5 is composed of a first connecting piece 6 and a second connecting piece 7. The outer shapes of the first connecting portion 21 and the second connecting portion 31 are formed in a circular shape. A flow path 29 is formed in the tubular portion 28 of the first connection portion 21, and a flow path 39 is formed in the tubular portion 38 of the second connection portion 31. The tubular portions 28 and 38 include flange adjacent portions adjacent to the flange portions 25 and 35, which will be described later, respectively.

As shown in FIG. 24, the annular seal member 4 has a main body portion 43, an overhanging portion 44 projecting from the outer peripheral surface of the main body portion 43 in the outer radial direction, and a grip provided on the outer peripheral edge portion of the overhanging portion 44. A unit 45 is provided. An annular seal grooves 46 and 47 are formed in the main body 43. The annular seal member 4 is made of a relatively hard and corrosion-resistant fluororesin such as PFA or PTFE (note that the cross section of the annular seal member 4 in FIGS. 23 and 24 is made of resin for easy viewing. A hatching pattern different from that of the connecting member 5 is attached).

An end surface 22 is formed on the surface of the first connecting portion 21 on which the annular seal member 4 is mounted. The end surface 22 is formed with a locking convex portion 27 protruding outward in the radial direction of the first connecting portion 21. A press-fitting portion 24 to be mounted in the annular seal groove 46 of the main body portion 43 of the annular seal member 4 is formed inside the end surface 22 in the radial direction. Further, in the first connecting portion 21, a mounting groove 23 for mounting the connecting member 5 is formed in an annular shape on the outer peripheral surface on the side opposite to the end surface 22 in the axial direction of the flow path 29 in the flange adjacent portion. .. A flange portion 25 is provided between the end surface 22 and the mounting groove 23. A connecting side tapered surface 26 is formed on the flange portion 25.
An end surface 32 is formed on the surface of the second connecting portion 31 on which the annular seal member 4 is mounted. A locking convex portion 37 protruding outward in the radial direction is formed on the end surface 32. A press-fitting portion 34 to be mounted on the annular seal groove 47 of the main body portion 43 is formed on the radial inside of the end surface 32. On the outer peripheral surface in the flow path 39 direction, a mounting groove 33 for mounting the connecting member 5 is formed in an annular shape on the flange adjacent portion. A flange portion 35 is provided between the end surface 32 and the mounting groove 33. A connecting side tapered surface 36 is formed on the flange portion 35.

(Structure of connecting member)
The connection internal configuration for connecting the first fluid device 2 and the second fluid device 3 of the connecting member 5 will be described.
As shown in FIG. 1, the connecting member 5 has a cylindrical shape and has a first connecting piece 6 and a second connecting piece 7. The first connecting piece 6 and the second connecting piece 7 are made of a fluororesin having strength and corrosion resistance (note that the cross sections of the first connecting piece 6 and the second connecting piece 7 in FIG. 6 and the like are easy to see. In order to do so, the hatching (FIG. 23), which is usually used for resins, is shaded with a pattern different from that of the hatching (FIG. 23). The inner peripheral surfaces of the first connecting piece 6 and the second connecting piece 7 are formed in an arc shape so as to be attached along the outer periphery of the first connecting portion 21 and the second connecting portion 31. The force acting to keep the first connection portion 21 and the second connection portion 31 away in the axial direction of the flow paths 29 and 39 of the annular seal member 4 mounted between the first connection portion 21 and the second connection portion 31. On the contrary, the connecting member 5 maintains the connected state between the first connecting portion 21 and the second connecting portion 31.
As shown in FIG. 23, in the connecting member 5, the first protrusion 60 of the first connecting piece 6 and the first protrusion 70 of the second connecting piece 7 are arranged in the mounting groove 23, and the first connecting piece 6 is the first. The two protrusions 61 and the second protrusion 71 of the second connecting piece 7 are arranged in the mounting groove 33. On the first connecting piece 6 of the connecting member 5, the connecting side tapered surfaces 60a and 61a are formed at positions corresponding to the connecting side tapered surface 26 of the first connecting portion 21 and the connecting side tapered surface 36 of the second connecting portion 31, respectively. Has been done. Since the connection structure of the first connecting piece 6 and the second connecting piece 7 of the connecting member 5, and the connecting structure of the first connecting portion 21 and the second connecting portion 31 is vertically symmetrical as shown in FIG. 23, the first connecting piece 6 By explaining the connection structure, the description of the connection structure of the second connecting piece 7 will be omitted.

Next, a more detailed external configuration of the connecting member 5 will be described with reference to FIGS. 1 to 9. Although the symbols A and B are attached to the pair of objects, the symbols A and B are omitted as appropriate because the explanation is complicated.
As shown in FIG. 7, the first connecting piece 6 of the connecting member 5 has an approximately U-shape having an opening 6a in a cross section orthogonal to the axial direction of the connecting member 5. The first connecting piece 6 is located at a position exceeding 180 degrees around the entire circumference of the connecting member 5, in other words, at a position exceeding 180 degrees around the entire circular cross section of the first connecting portion 21 and the second connecting portion 31. Engage with the second connecting piece 7. The second connecting piece 7 has a shape that covers the opening 6a of the first connecting piece 6. A plurality of axially recessed recesses 6b and 7a are radially formed on the axial surfaces of the first connecting piece 6 and the second connecting piece 7. As shown in FIG. 2, an end portion 65 is formed at one end in the circumferential direction of the first connecting piece 6, and a first hinge portion 63 is formed at both ends in the axial direction of the end portion 65. A second hinge portion 73 is formed at one end of the second connecting piece 7 in the circumferential direction, and is rotatably engaged with the first hinge portion 63. The first hinge portion 63 is formed with a mark convex portion 63a on the outer periphery along the axial direction. Further, the second hinge portion 73 is formed with a mark convex portion 73a on the outer periphery along the axial direction. By visually or tactilely confirming that the mark convex portion 63a and the mark convex portion 73a are in a straight line as shown in FIG. 2, it can be seen that they are in the normal engagement position. The first hinge portion 63 and the second hinge portion 73 of the present embodiment are examples of the "rotational connecting portion" of the present application.

As shown in FIG. 5, at the other end of the first connecting piece 6 in the circumferential direction, a pair of first locking portions 64 (64A, 64B) are attached to the second connecting piece 7 at both ends in the axial direction of the connecting member 5. It is erected toward you. Since the first locking portions 64A and 64B have the same shape, they are described below as the first locking portion 64. The tip of the first locking portion 64 is formed with a tip portion 64aa bent outward in the radial direction.
The inner peripheral surface of the first connecting piece 6 has a partially cutout portion 69a in the center, and a thin portion 69 formed thinly on the outer peripheral edge of the first connecting piece 6. A pair of T-shaped detachable locking portions 68 (68A, 68B) are formed on the outer peripheral surface of the first connecting piece 6 at positions corresponding to the thin portion 69. A convex portion 66 is formed on the outer peripheral surface of the first connecting piece 6 on the first locking portion 64 side. The convex portion 66 is formed with a concave portion 66a which is the other end in the circumferential direction of the first connecting piece 6 and is recessed in the center in the axial direction. It can be seen that the recess 66a is in a retightened state by overlapping with the protrusion 76 of the second connecting piece 7, which will be described later. The convex portion 66 is formed with a gently curved curved surface portion 66b toward the detachable locking portion 68. A second jig hooking portion 66c is formed between the curved surface portion 66b and the detachable locking portion 68. The second jig hooking portion 66c projects toward the detachable locking portion 68. A jig engaging surface 66d is formed on the opposite side of the curved surface portion 66b of the second jig hooking portion 66c. The first connecting piece 6 has recesses 6c formed on both ends in the axial direction over the entire circumference. The concave portion 6c is formed to be one step smaller than the convex portion 66. As shown in FIG. 20, even when fluid devices are installed in parallel, the recess 6c allows the jig 8 to be further inserted into the connecting member 5 and avoids interference with the adjacent connecting member 5. be able to.

As shown in FIG. 5, the other end of the second connecting piece 7 in the circumferential direction engages with the first locking portion 64 (64A, 64B) of the first connecting piece 6 at both ends in the axial direction of the connecting member 5. A pair of first locking receiving portions 75 (75A, 75B) are erected toward the first connecting piece 6. Since the first locking receiving portions 75A and 75B have the same shape, they will be described below as the first locking receiving portion 75. The tip of the first locking receiving portion 75 is formed with a tip portion 75aa bent inward in the radial direction. Further, the chamfered portion 7c which is the inner peripheral surface of the second connecting piece 7 and does not abut on the surface of the first connecting portion 21 and the second connecting portion 31 but does not abut on the first connecting portion 21 and the second connecting portion 31. Is formed. The chamfered portion 7c is tapered so that interference between the flange portion 25 of the first connecting portion 21 and the flange portion 35 of the second connecting portion 31 shown in FIG. 24 can be avoided. The second connecting piece 7 can be smoothly brought closer to the first connecting piece 6 to the position where it is caught.
The tip portion 64aa of the first locking portion 64 and the tip portion 75aa of the first locking receiving portion 75 are engaged as shown in FIG. This is the first locking position. In this state, an elastic force toward the first locking portion 64 always acts on the first locking receiving portion 75. Therefore, since the tip portion 64aa and the tip portion 75aa are engaged with each other on a flat surface, when a force for disconnecting the connecting member 5 is applied, the tip portion 64aa and the tip portion 75aa bite into each other and are held so as not to be disengaged. can do. At the first locking position, there is a gap X between the tip portion 75aa of the first locking receiving portion 75 and the first locking portion 64, and the tip portion 64aa and the first locking receiving portion 75 of the first locking portion 64. A gap Y is formed between the two. Due to the gap X and the gap Y, the tip portion 64aa and the tip portion 75aa can be reliably meshed with each other.

As shown in FIG. 1, one extending portion 78 extends radially outward between the first locking receiving portions 75A and 75B of the second connecting piece 7. A protrusion 76 is erected in the center of the tip of the extension 78 in the direction of the first connecting piece. A first jig hooking portion 77 is formed so as to project in the axial direction on the opposite side of the protruding portion 76 of the extending portion 78.
As shown in FIG. 2, a rotating action portion 74 is formed on the outer peripheral surface of the second connecting piece 7 on the side of the second hinge portion 73 so as to project outward in the radial direction. As shown in FIG. 7, when the first connecting piece 6 and the second connecting piece 7 are opened, the rotating action unit 74 engages with the end portion 65 of the first connecting piece 6 and attaches the second connecting piece 7 to the second connecting piece 7. I try not to rotate more than a certain amount. Further, at this time, as shown in the fourth connecting member 5 (FIG. 20 (e)) from the right in FIG. 20, the rotating action portion 74 is pushed from one direction by the jig 8 to perform the first locking. The second connecting piece 7 can be rotated in a direction in which the portion 64 and the first locking receiving portion 75 approach each other.
Further, a first resistance projection 6d is formed near the first hinge portion 63 of the first connecting piece 6 and on the inner peripheral side of the end portion 65. A second resistance projection 7b that abuts on the first resistance projection 6d is formed in the vicinity of the second hinge portion 73 of the second connecting piece 7. When the first resistance protrusion 6d and the second resistance protrusion 7b come into contact with each other, frictional force is generated by rubbing, preventing the rotation by its own weight and temporarily fixing the first resistance protrusion 6d. The first resistance projection 6d and the second resistance projection 7b of the present embodiment are examples of the “resistance generating portion” of the present application.

(Jig configuration)
Next, the configuration of the fluid device connection jig 8 (hereinafter, simply referred to as a jig) will be described with reference to FIGS. 10 and 11. FIG. 10 shows a perspective view of the jig 8. FIG. 11 shows a cross-sectional view taken along the line CC of FIG.
The jig 8 has a thin plate-like rectangular shape. A pair of detachable locking receiving portions 81A and 81B that engage with the detachable locking portions 68A and 68B of the connecting member 5 are formed at one end (upper end in FIG. 10) of the jig 8 in the longitudinal direction. The detachable locking receiving portions 81A and 81B are formed so as to project from both ends in the width direction of the jig 8 toward the center. A protruding portion 81aa is formed between the detachable locking receiving portions 81A and 81B. Further, at one end of the jig 8 in the longitudinal direction, a stopper 81bb straddling the protruding portion 81aa is formed between the detachable locking receiving portions 81A and 81B.

The other end in the longitudinal direction of the jig 8 (the lower end in FIG. 10) is formed with a square first penetration portion 82, which is the first penetration portion 82 and corresponds to the other end in the longitudinal direction of the jig 8. A common hooking portion 82a is formed at the position. Next to the first penetration portion 82, a square second penetration portion 83 is formed in the center of the jig 8, and a support shaft integrated with the rotating member 84 is formed in the support shaft hole 83a of the second penetration portion 83. The 86 is rotatably held. One end of the rotating member 84 is formed with a rounded first locking position hooking portion 84a. The other end of the rotating member 84 is formed with a second locking position hooking portion 84b having a width smaller than that of the first locking position hooking portion 84a. Further, as shown in FIG. 11, the length L1 from the tip of the first locking position hooking portion 84a to the central axis of the support shaft 86 is the length L1 from the tip of the second locking position hooking portion 84b to the support shaft 86. It is formed shorter than the length L2 to the central axis. A pair of convex portions 83b are formed on the second penetrating portion 83 on the side close to the detachable locking receiving portions 81A and 81B at both ends in the width direction (see FIG. 22) of the jig 8. Due to the presence of the convex portion 83b, the second locking position hooking portion 84b having a small width can pass through the inside of the second penetrating portion 83 (between the pair of convex portions 83b), but the first having a large width. The locking position hooking portion 84a abuts on the convex portion 83b and cannot pass through, so that the rotation of the rotating member 84 is controlled. A branch portion 84c is erected on the second locking position hooking portion 84b side of the rotating member 84. A removable bridge 85 is formed between the first penetrating portion 82 and the second penetrating portion 83.

(Action of fluid equipment connection structure)
The normal use state in which the connecting member 5 is changed from the initial state to the first locking position will be described with reference to FIGS. 12 to 13, FIGS. 15 to 16, and FIGS. 18. The normal use state means a state in which the connecting member 5 is installed at the first locking position as shown in FIG. 12 (d). At the first locking position, the first locking portion 64 of the first connecting piece 6 is engaged with the first locking receiving portion 75 of the second connecting piece 7.
First, as shown in FIGS. 12 (a) and 12 (b), an annular seal member 4 is placed between the first fluid device 2 and the second fluid device 3, and the annular seal member 4 is placed by using a jig (not shown). 1 After press-fitting into the fluid device 2 and the second fluid device 3 to make a temporary connection, the recess 6b of the connecting member 5 is fitted so as not to be visible as shown in FIG. 12 (c). At this time, as shown in FIG. 8, the size N of the opening 6a of the first connecting piece 6 is the diameter (outer diameter) of the tubular portion 28 of the first connecting portion 21 and the tubular portion 38 of the second connecting portion 31. It is formed smaller than P. In particular, due to the elastic deformation of the thin portion 69 of the first connecting piece 6, the first connecting piece 6 is attached to the tubular portion 28 of the first connecting portion 21 from the diameter P of the tubular portion 28 to the opening 6a. It spreads outward by the difference in size M, and can be fitted into a portion of the first connection portion 21 and the second connection portion 31 that exceeds 180 degrees on the entire circumference. Then, as shown in FIG. 12 (d), the second connecting piece 7 is engaged with the first locking position of the first connecting piece 6, and the connection in the normal use state is completed. At this time, the recesses 6b and 7a of the connecting member 5 cannot be seen. By hiding the recesses 6b and 7a behind the first connecting portion 21 and the second connecting portion 31 and making them invisible from the outside, it can be confirmed that the concave portions 6b and 7a are connected at the correct positions.

Further, the attachment of the connecting member 5 in a narrow space such as that shown in FIG. 9 will be described with reference to FIG. 20. FIG. 20A shows a connection complete state during normal use. The connection procedure is shown in order from FIGS. 20 (b) to 20 (h). As shown in FIG. 20 (b), the second connecting piece 7 is inserted between the adjacent tubular portions 28 from the opposite side of the installation surface 300 into the temporarily connected first connecting portion 21 and the second connecting portion 31. To. As shown in FIG. 20 (c), the second connecting piece 7 is rotated toward the tubular portion 28 in advance, and the first connecting piece 6 is attached to the first connecting portion 21 and the second connecting portion 31. As shown in FIG. 20 (d), when the first connecting piece 6 is fitted into the tubular portion 28, the second connecting piece 7 comes into contact with the installation surface 300 and further rotates toward the tubular portion 28. As shown in FIG. 20 (e), the elongated jig 8 is inserted from the opposite side of the installation surface 300 on the first hinge portion 63 side until the rotating action portion 74 of the second connecting piece 7 is pushed out by the tip of the jig 8. Let me. As a result, the second connecting piece 7 rotates around the second hinge portion 73 as a fulcrum, the first locking receiving portion 75 is brought closer to the first connecting piece 6, and the first resistance projection 6d and the second resistance projection 7b are formed. By abutting, it can be temporarily fixed at that position by the frictional force generated by rubbing. As shown in FIGS. 20 (f), (g) and (h), the second connecting piece 7 is inserted in the operation of inserting and pulling up the elongated jig 8 from the opposite side of the installation surface 300 on the first locking portion 64 side. While pulling up, it is locked to the first connecting piece 6.

Here, the procedure of FIGS. 20 (f), (g), and (h) will be described in detail with reference to FIG. As shown in FIGS. 18A and 18B, the jig 8 is arranged on the side surface of the connecting member 5 from the same direction as the direction in which the connecting member 5 is mounted. At this time, since the jig 8 is inserted along the recess 6c of the connecting member 5, interference with the adjacent connecting member 5 can be avoided even if the fluid devices are lined up in parallel. Subsequently, as shown in FIG. 20 (f), the common hooking portion 82a of the jig 8 is temporarily fixed at a position close to the first connecting piece 6, and the first jig hooking portion 77 of the second connecting piece 7 is temporarily fixed. Engage in.
Next, the jig 8 is tilted in the direction of arrow F. As shown in FIGS. 18 (c) and 18 (d), when the second locking position hooking portion 84b is also pushed in the direction of the arrow F at the same time, the first locking position hooking portion 84a cures the first connecting piece 6. It is engaged with the second jig hooking portion 66c along the tool engaging surface 66d. As a result, the first locking portion 64 and the first locking receiving portion 75 approach each other and engage with each other, and are positioned at the first locking position. After that, the second locking position hooking portion 84b of the jig 8 is pushed to the opposite side in the arrow F direction, the jig 8 is removed from the first jig hooking portion 77, the jig 8 is removed, and the jig 8 is in a normal use state. The connection is complete. At this time, a gap S is formed between the convex portion 66 of the first connecting piece 6 and the extended portion 78 of the second connecting piece 7 as shown in FIG. Further, at this time, as shown in FIG. 6, the tip position of the protrusion 76 coincides with the end position of the recess 66a, and it is confirmed by visually observing this position that the connection is in the normal use state. Can be done.
In this way, the jig 8 is inserted from the same direction in which the connecting member 5 is mounted on the first connecting portion 21 and the second connecting portion 31, and the first connecting piece 6 and the second connecting piece 7 are engaged with each other. It is possible to work from only one direction, and it is easy to work even in a narrow space where many fluid devices are installed in parallel, and workability is good.

Next, the retightening state in which the connecting member 5 is changed from the first locking position to the second locking position will be described with reference to FIGS. 14, 17, and 19.
Here, creep deformation occurs when the first connection portion 21 and the second connection portion 31 are alternately and repeatedly flowed with an abnormally high temperature liquid (chemical solution) and an abnormally low temperature liquid (pure water) for a long period of time. In some cases, the sealing force may decrease, such as when the annular sealing member 4 is connected between the first connecting portion 21 and the second connecting portion 31 with a foreign substance caught in the connection. When the sealing force is reduced, liquid leakage occurs. In such an emergency, the connecting member 5 is retightened.
For this retightening, the second locking position pulling, which has a longer distance from the support shaft 86 than the first locking position hooking portion 84a of the jig 8 used when the connecting member 5 is set to the first locking position. The hanging portion 84b is used. In order to rotate the rotating member 84 in order to use the second locking position hooking portion 84b, the bridge 85 of the jig 8 is removed. As a result, the rotating member 84 can be rotated. By adding a procedure for removing the bridge 85, it is possible to prevent accidental retightening.

As shown in FIG. 19A, the common hooking portion 82a of the jig 8 is engaged with the first jig hooking portion 77 of the second connecting piece 7. Subsequently, the jig 8 is tilted in the direction of arrow G. At the same time, when the first locking position hooking portion 84a is also pushed in the direction of the arrow G, the second locking position hooking portion 84b engages with the second jig hooking portion 66c along the jig engaging surface 66d. Will be done. Further, the first locking position hooking portion 84a is positioned in contact with the convex portion 83b. Since the first locking position hooking portion 84a is longer than the second locking position hooking portion 84b, a strong force acts in the direction of bringing the first connecting piece 6 and the second connecting piece 7 closer to each other by the principle of the lever. .. At this time, the first connecting piece 6 and the second connecting piece 7 approach each other while filling the gap S between the convex portion 66 of the first connecting piece 6 and the extending portion 78 of the second connecting piece 7.
As shown in FIGS. 23 and 24, the first connecting piece 6 of the connecting member 5 has a connecting side tapered surface at a position corresponding to the connecting side tapered surfaces 26 and 36 of the first connecting portion 21 and the second connecting portion 31. Since the 60a and 61a are formed, when the first connecting piece 6 and the second connecting piece 7 approach each other, the connecting side tapered surfaces 60a and 61a are pressed against the connecting side tapered surfaces 26 and 36, and the first connecting portion 21 and the second 2 The connection portion 31 is pressed against the annular seal member 4 side, and liquid leakage can be stopped. Since the connection structure of the second connecting piece 7, the first connecting portion 21 and the second connecting portion 31 is vertically symmetrical as shown in FIG. 23, the same thing as the first connecting piece 6 is on the second connecting piece 7 side. But it is done.
With the jig 8 engaged with the connecting member 5 by the procedure up to this point, the positioning of the connecting member 5 at the second locking position, which is the retightening state, is completed.
Further, since the jig 8 is attached to the connecting member 5, the operator is notified that the retightening work is completed. Since the jig 8 is attached to the connecting member 5 to indicate the retightened state, it can be easily confirmed from the appearance that the retightened state is in the retightened state. It is possible to find a fluid device, stop the fluid, replace the connecting member 5, and so on, and the workability is good.

The removal of the connecting member 5 will be described with reference to FIGS. 21 and 22. In FIG. 21, (a) shows a perspective view showing a state in which the jig 8 is hooked on the connecting member 5 when the connecting member 5 is removed. (B) is a perspective view in a state where the jig 8 is pulled and the connecting member 5 is removed. In FIG. 22, (a) shows a front view of a state in which the jig 8 is hooked on the connecting member 5 when the connecting member 5 is removed. (B) is a front view of a state in which the connecting member 5 is removed by pulling the jig 8.
A jig 8 is used to remove the connecting member 5. As shown in FIGS. 21 (a) and 22 (a), the protruding portion 81aa of the jig 8 is inserted between the pair of attachment / detachment locking portions 68A and 68B of the connecting member 5, and the pair of attachment / detachment portions of the jig 8 are engaged. The retaining portions 81A and 81B are slid with respect to the detachable locking portions 68A and 68B of the connecting member 5 and engaged with the stopper 81bb of the jig 8 until they come into contact with each other. After firmly engaging the detachable locking receiving portions 81A and 81B with the detachable locking portions 68A and 68B, the jig 8 is pulled in the direction of arrow H to engage with the first locking portion 64 of the connecting member 5. The engagement of the retaining portion 75 is released, and the connecting member 5 can be removed from the first fluid device 2 and the second fluid device 3.
Further, the connecting member 5 can be attached by a procedure opposite to the procedure shown above.

Other embodiments of the connecting member 5 are shown in FIGS. 36 to 43. FIG. 36 is a cross-sectional view of the first connecting piece 6. FIG. 37 is a cross-sectional view of the second connecting piece 7. 38 is an enlarged view of part I of FIG. 36, and FIG. 39 is a cross-sectional view taken along the line RR of FIG. 38. 40 is an enlarged view of the J portion of FIG. 36, and FIG. 41 is a sectional view taken along the line TT of FIG. 40. 42 is an enlarged view of the Q portion of FIG. 37, and FIG. 43 is a cross-sectional view of the UU of FIG. 42.
As shown in FIG. 36, the inner peripheral surface of the first connecting piece 6 at a position facing the connecting side tapered surface 26 which is the outer peripheral portion of the flange portion 25 of the first connecting portion 21, and the second connecting portion 31. A pair of convex protrusions 91, a pair of convex protrusions 92, a pair of convex protrusions 93, and a pair of convex protrusions at positions facing the connection-side tapered surface 36 which is the outer peripheral portion of the flange portion 35 of the above. The portions 94 are formed at opposite positions.
Further, a pair of protrusions on the inner peripheral surface of the second connecting piece 7 at positions facing the connection-side tapered surface 26 which is the outer peripheral portion of the flange portion 25 and the connection-side tapered surface 36 which is the outer peripheral portion of the flange portion 35. The shape protrusion 95 is formed.

The shapes of the pair of convex protrusions 91 are enlarged and shown in FIGS. 38 and 39. As shown in the figure, the pair of convex protrusions 91 are on the inner peripheral surface of the first connecting piece 6 and have a predetermined length in the direction along the inner peripheral surface, and are radially inside the connecting member 5. It protrudes toward. The pair of convex protrusions 92 has the same shape as the pair of convex protrusions 91.
The shapes of the pair of convex protrusions 93 are enlarged and shown in FIGS. 40 and 41. As shown in the figure, the pair of convex protrusions 93 are on the inner peripheral surface of the first connecting piece 6 and have a predetermined length in the direction along the inner peripheral surface, and are radially inside the connecting member 5. It protrudes toward. The pair of convex protrusions 94 has the same shape as the pair of convex protrusions 93.
The shapes of the pair of convex protrusions 95 are enlarged and shown in FIGS. 42 and 43. As shown in the figure, the pair of convex protrusions 95 are on the inner peripheral surface of the second connecting piece 7, have a predetermined length in the direction along the inner peripheral surface, and are radially inside the connecting member 5. It protrudes toward.

Next, the actions and effects of each pair of convex protrusions 91, 92, 93, 94, 95 will be described.
As shown in FIG. 16, the tip portion 64aa of the first locking portion 64 of the first connecting piece 6 and the tip portion 75aa of the first locking receiving portion 75 of the second connecting piece 7 are usually in contact with each other. It fits. However, due to the tolerances of the first connecting piece 6 and the second connecting piece 7, there is a possibility that a gap is generated between the contact surfaces of the tip portion 64aa and the tip portion 75aa and cannot be meshed with each other. The condition does not affect the sealing force, but the user may feel that the mounting is not completed.
In the present embodiment, the inner peripheral surface of the first connecting piece 6 at a position facing the connecting side tapered surface 26 which is the outer peripheral portion of the flange portion 25, and the connecting side tapered surface which is the outer peripheral portion of the flange portion 35. A pair of convex protrusions 91, a pair of convex protrusions 92, a pair of convex protrusions 93, and a pair of convex protrusions 94 are formed at positions facing the 36, respectively, and a second connection is further formed. A pair of convex protrusions 95 are located on the inner peripheral surface of the piece 7 at positions facing the connection-side tapered surface 26 which is the outer peripheral portion of the flange portion 25 and the connection-side tapered surface 36 which is the outer peripheral portion of the flange portion 35. Since it is formed, the first connecting piece 6 and the second connecting piece 7 are pressed outward in the radial direction, so that there is no gap between the contact surfaces of the tip portion 64aa and the tip portion 75aa so that they can be reliably meshed with each other. become.
In the present embodiment, 5 pairs of convex protrusions are formed, but 2 pairs, 3 pairs, 4 pairs, 6 pairs, or 7 pairs of convex protrusions may be formed.

As described above, according to the fluid device connection structure 1 of the present embodiment, (1) the first fluid device 2 having the first connection portion 21 and the second fluid device 3 having the second connection section 31. , The annular seal member 4 that connects the first connection portion 21 and the second connection portion 31, and the connecting member 5 that maintains the connected state of the first connection portion 21 and the second connection portion 31 via the annular seal member. In the connecting member 5 used for the fluid device connecting structure 1, the connecting member 5 includes a first connecting piece 6 and a second connecting piece 7, and is rotated to one end of the first connecting piece 6 and the second connecting piece 7 in the circumferential direction. It has a dynamic connecting portion (first hinge portion 63 and second hinge portion 73), the outer shape of the first connecting portion 21 and the second connecting portion 31 is circular, and the first connecting piece 6 has an opening 6a. It is an approximately U-shaped shape having a No engaging portion is installed on the outside in the direction, and the connecting member itself is compactly formed. Therefore, even when the tubular portions 28, 38 are adjacent to each other or the wall surface is adjacent to each other and there is no space for installing a large number of fluid devices in parallel, the tubular portions 28, 38 can be installed and the workability is good.

(2) In the connecting member 5 according to (1), the size N of the opening 6a is formed to be smaller than the diameter P of the tubular portions 28 and 38 of the first connecting portion 21 and the second connecting portion 31. That is, the first connecting piece 6 can be deformed so as to spread outward by the difference in size M of the opening 6a from the diameter P of each of the tubular portions 28 and 38 of the first connecting portion 21 and the second connecting portion 31. Since the first connecting piece 6 spreads outward by a certain length, it can be fitted into the first connecting portion 21 and the second connecting portion 31 and temporarily fixed, so that its own weight and external force are applied after the fitting. However, it is hard to come off and workability is good.

(3) The connecting member 5 according to (1) or (2) is characterized in that a thin portion 69 having a notch portion 69a is formed in the first connecting piece 6, and thus the first connecting piece. No. 6 causes the thin portion 69 to elastically deform with an appropriate strength when attached to the first connection portion 21 and the second connection portion 31, the opening 6a is widened, and the opening 6a is tightened after attachment. The worker can wear it with an appropriate wearing force and feel a proper wearing feeling, and it becomes difficult to come off after mounting, and the workability is good.

(4) In the connecting member 5 according to any one of (1) to (3), the rotating connecting portion of the first connecting piece 6 and the second connecting piece 7 is used to prevent the rotation of its own weight. The resistance generating portion (first resistance protrusion 6d and second resistance protrusion 7b) is formed, and the inner peripheral surface of the second connecting piece 7 is in contact with the first connecting portion 21 and the second connecting portion 31. Since the surface is formed with a portion (chamfered portion 7c) that does not abut on the first connecting portion 21 and the second connecting portion 31, the first resistance projection 6d and the first resistance projection 6d of the first connecting piece 6 are provided. When the second resistance protrusion 7b of the two connecting pieces 7 comes into contact with each other, the first connecting piece 6 and the second connecting piece 7 are rubbed against each other to generate a frictional force and can be temporarily fixed, so that workability is good. Further, there is a range in which the first connecting portion 21 and the second connecting portion 31 can rotate freely without interfering with each other, and at the same time, frictional resistance is generated up to that range. Until the connecting piece 7 is engaged, the position of the second connecting piece 7 can be temporarily fixed at a position where it is easy to work, and workability is good.

(5) In the connecting member 5 according to any one of (1) to (4), T-shaped or L-shaped detachable locking portions 68A and 68B are formed on the outer periphery of the first connecting piece 6. Since the attachment / detachment locking portions 68A and 68B can be pinched, the connecting member can be pressed or pulled by engaging the jig 8 with the attachment / detachment locking portions 68A and 68B. Workability is good because it is easy to attach and remove 5.

(6) The connecting member 5 according to any one of (1) to (5) is characterized in that a rotating action portion 74 is formed on the outer periphery of the second connecting piece 7. The second connecting piece 7 can be rotated by applying a load to the rotating action portion 74 from the same direction as the direction in which the connecting member 5 is attached to the first connecting portion 21 and the second connecting portion 31, and the workability is good. ..

(7) In the connecting member 5 according to any one of (1) to (6), a position facing the outer peripheral portion of the first connecting portion 21 of the first connecting piece 6 and a second of the first connecting piece 6. 2 Convex protrusions 91, 92, 93, 94 are formed at positions facing the outer peripheral portion of the connection portion 31, respectively, and (8) the first of the second connecting pieces 7. It is characterized in that convex protrusions 95 are formed at positions facing the outer peripheral portion of the connecting portion 21 and at positions facing the outer peripheral portion of the second connecting portion 31 of the second connecting piece 7, respectively.
According to the configuration of (7) or (8), the following effects are exhibited. That is, as shown in FIG. 16, the tip portion 64aa of the first locking portion 64 of the first connecting piece 6 and the tip portion 75aa of the first locking receiving portion 75 of the second connecting piece 7 are usually in contact with each other. Are engaged. However, due to the tolerance of the first connecting piece 6 and the second connecting piece 7, there is a possibility that a gap is generated between the tip portion 64aa and the tip portion 75aa and the tip portion cannot be meshed with each other. The condition does not affect the sealing force, but the user may feel that the mounting is not completed. At a position facing the connection-side tapered surface 26 which is the outer peripheral portion of the flange portion 25 of the first connecting piece 6, and a position facing the connecting-side tapered surface 36 which is the outer peripheral portion of the flange portion 35 of the first connecting piece 6. It is characterized in that a pair of convex protrusions 91, 92, 93, 94 are formed, and further, a position facing the connection side tapered surface 26 which is an outer peripheral portion of the flange portion 25 of the second connecting piece 7. The second connecting piece 7 is characterized in that a pair of convex protrusions 95 are formed at a position facing the connecting side tapered surface 36 which is an outer peripheral portion of the flange portion 35 of the second connecting piece 7. In the second connecting piece 7, the convex protrusions 91, 92, 93, 94, 95 and the connecting side tapered surfaces 26, 36 are pressed outward in the radial direction while being deformed to each other, so that the tip 64aa and the tip 75aa There will be no gap between them, and they will be able to mesh securely.
(9) In the connecting member 5 according to any one of (1) to (8), the other end of the first connecting piece 6 in the circumferential direction is provided with a first locking portion 64, and the second connecting piece 7 is provided. The other end in the circumferential direction is provided with a first locking receiving portion 75 to which the first locking portion 64 is locked, and the connecting member 5 is engaged with the first locking portion 64 and the first locking receiving portion 75. It is characterized in that it is positioned at the first locking position and that the connecting member 5 has a second locking position closer to the annular seal member direction than when it is at the first locking position. (10) The first locking position is in a normal use state, and the second locking position is in a retightening state. Therefore, the first connection portion 21 and the second connection portion 31 are abnormal. Because there is a first locking position and a second locking position when the sealing force is reduced and liquid leakage occurs due to the alternating high temperature chemical solution and abnormally low temperature pure water for a long period of time. By setting the second locking position closer to the annular seal member direction, the bonding force between the first connecting portion 21 and the second connecting portion 31 can be increased, and it is possible to take an immediate response when a liquid leak occurs. Become.

(11) In the fluid equipment connecting jig 8 used for the connecting member 5 according to any one of (1) to (10), the first connecting piece 6 has a second jig hooking portion 66c on the outer peripheral surface. Is formed, the second connecting piece 7 has a first jig hooking portion 77 formed on the outer peripheral surface thereof, and the fluid equipment connecting jig 8 is common to engage with the first jig hooking portion 77. It is characterized by including a hooking portion 82a, a first locking position hooking portion 84a that engages with the second jig hooking portion 66c, and a second locking position hooking portion 84b. By using the jig 8, the first connecting piece 6 and the second connecting piece 7 can be connected to both the first locking position and the second locking position.

(12) In the fluid equipment connecting jig 8 used for the connecting member 5 according to any one of (1) to (10), the fluid equipment connecting jig 8 connects the connecting member 5 to the first connecting portion 21 and Since it is characterized in that the first connecting piece 6 and the second connecting piece 7 are engaged by being inserted from the same direction as the direction of mounting on the second connecting portion 31, it is possible to work from only one direction. Therefore, work can be easily performed even in a narrow space where many fluid devices are installed in parallel, and workability is good.

(13) In the fluid equipment connecting jig 8 used for the connecting member 5 according to any one of (1) to (10), the fluid equipment connecting jig 8 is attached to the connecting member 5. Since the retightening state is indicated by the above, it is possible to easily confirm from the outside that the retightening state is in the state where the fluid equipment connection jig is attached to the connecting member. At the time of maintenance, it is possible to find and respond to fluid equipment in a retightened state at a glance, and workability is good.

It should be noted that the present embodiment is merely an example and does not limit the present invention in any way. Therefore, the present invention can be variously improved and modified without departing from the gist of the present invention.
For example, a T-shaped detachable locking portion 68 is formed on the outer periphery of the first connecting piece 6 of the present embodiment, but the shape of the detachable locking portion 68 may be such that the jig 8 can be hooked. It may have a character shape or only one place.
For example, the chamfered portion 7c is formed on the inner peripheral surface of the second connecting piece 7 of the present embodiment, which is in contact with the first connecting portion 21 and the second connecting portion 31, but the first connecting portion is formed. It may be a relief shape that does not come into contact with the second connection portion, and may not be a chamfered shape.
For example, the material of the jig 8 may be a general resin, a fluororesin such as PTFE or PTFE, or a metal.
For example, frictional resistance is generated by the contact between the first resistance projection 6d and the second resistance projection 7b, and the shafts of the flow paths 29 and 39 provided in the first hinge portion 63 and the second hinge portion 73. It may be generated by contact between surfaces perpendicular to the center direction.
Further, in the present embodiment, the convex protrusions 91, 92, 93, 94, 95 are the connection sides which are the outer peripheral portions of the flange portions 25, 35 in the first connecting piece 6 and the second connecting piece 7, respectively. Although it was formed at a position facing the tapered surfaces 26 and 36, it is a position facing the outer peripheral surfaces 25a and 35a (both sides of the grip portion 45 of the annular seal member 4 in FIG. 24) which are the outer peripheral portions of the flange portions 25 and 35. May be formed in.
Further, in the present embodiment, the convex protrusions 91, 92, 93, 94, and 95 are provided in pairs at the same position in the circumferential direction, but they may be installed alternately.
Further, in the present embodiment, the convex protrusions 91, 92, 93, 94, 95 and the connecting side tapered surfaces 26, 36 are deformable to each other, but the convex protrusions 91, 92, 93, 94, 95. By making the hardness of the convex protrusions 91, 92, 93, 94, 95 relatively high, the amount of deformation of the convex protrusions 91, 92, 93, 94, 95 may be smaller than that of the connecting side tapered surfaces 26, 36.

1 Fluid equipment connection structure 2 1st fluid equipment 21 1st connection part 3 2nd fluid equipment 31 2nd connection part 4 Circular seal member 5 Connecting member 6 1st connecting piece 6a Opening 6d 1st resistance protrusion 64 1st locking Part 66a Recess
69 Thin part 7 2nd connecting piece 7b 2nd resistance protrusion 7c Chamfering part 75 1st locking receiving part 76 Protrusion part 8 Fluid equipment connection jig 82a Common hooking part 84a 1st locking position hooking part 84b 2nd engagement Stop position hooking part 91, 92, 93, 94, 95 A pair of convex protrusions

Claims (12)

A first fluid device having a first connection portion, a second fluid device having a second connection portion, an annular seal member arranged between the first connection portion and the second connection portion, and the annular seal member. In the connecting member used in the fluid equipment connecting structure having the connecting member connecting the first connecting portion and the second connecting portion via the above.
The connecting member includes a first connecting piece and a second connecting piece, and has a rotary connecting portion at one end of the first connecting piece and the second connecting piece.
The outer shape of the first connection portion and the second connection portion is circular.
The first connecting piece has an approximately U-shape having an opening, and engages with the second connecting piece by exceeding 180 degrees around the entire circumference of the first connecting portion and the second connecting portion .
A T-shaped or L-shaped detachable locking portion is formed on the outer periphery of the first connecting piece.
A connecting member characterized by. A first fluid device having a first connection portion, a second fluid device having a second connection portion, an annular seal member arranged between the first connection portion and the second connection portion, and the annular seal member. In the connecting member used in the fluid equipment connecting structure having the connecting member connecting the first connecting portion and the second connecting portion via the above.
The connecting member includes a first connecting piece and a second connecting piece, and has a rotary connecting portion at one end of the first connecting piece and the second connecting piece.
The outer shape of the first connection portion and the second connection portion is circular.
The first connecting piece has an approximately U-shape having an opening, and engages with the second connecting piece by exceeding 180 degrees around the entire circumference of the first connecting portion and the second connecting portion .
The first connection portion and the second connection portion are connected to the annular seal member by press fitting.
The first connecting piece and the second connecting piece have a protrusion that engages with the first connecting portion and the second connecting portion, respectively.
A connecting member characterized by. In the connecting member according to claim 1 or 2 .
The size of the opening is formed to be smaller than the diameter of each tubular portion of the first connection portion and the second connection portion.
The first connecting piece can be deformed so as to extend from the diameter of each tubular portion of the first connecting portion and the second connecting portion to the outside of the difference in the size of the opening.
A connecting member characterized by. In the connecting member according to any one of claims 1 to 3 .
A thin portion having a notch is formed in the first connecting piece.
A connecting member characterized by. In the connecting member according to any one of claims 1 to 4 .
Convex protrusions are formed at positions facing the outer peripheral portion of the first connecting portion of the first connecting piece and at positions facing the outer peripheral portion of the second connecting portion of the first connecting piece, respectively. Convex protrusions at positions facing the outer peripheral portion of the first connecting portion of the second connecting piece and at positions facing the outer peripheral portion of the second connecting portion of the second connecting piece, respectively. Is formed,
At least one of the convex protrusion portion of the first connecting piece and the convex protrusion portion of the second connecting piece is pressed outward in the radial direction by the first connecting portion and the second connecting portion.
A connecting member characterized by. In the connecting member according to any one of claims 1 to 5 .
The rotation connecting portion of the first connecting piece and the second connecting piece is formed with a resistance generating portion for preventing rotation by its own weight .
A connecting member characterized by. In the connecting member according to any one of claims 1 to 6 .
A rotating action portion is formed on the outer periphery of the second connecting piece.
By pushing the rotating action portion from the same direction as the direction in which the first connecting piece is attached to the first connecting portion and the second connecting portion, the first connecting piece and the second connecting piece come close to each other. The ability to rotate the second connecting piece,
A connecting member characterized by. In the connecting member according to any one of claims 1 to 7 .
The other end of the first connecting piece includes a first locking portion, and the other end of the second connecting piece includes a first locking receiving portion to which the first locking portion is locked, and the connecting member. Is positioned at the first locking position where the first locking portion and the first locking receiving portion engage.
The connecting member has a second locking position closer to the annular seal member direction than when it is in the first locking position.
The first locking position is in a normal use state.
The second locking position is in the retightened state.
By applying a force to the second connecting piece in a direction facing the direction in which the first connecting piece is attached to the first connecting portion and the second connecting portion, the tightening state is achieved.
A connecting member characterized by. In the fluid equipment connecting jig used for the connecting member according to any one of claims 1 to 8 .
By indicating that the fluid device connecting jig is attached to the connecting member, the retightening state is indicated.
A fluid equipment connection jig featuring. In the fluid equipment connecting jig used for the connecting member according to any one of claims 1 to 8 .
The first connecting piece has a second jig hooking portion formed on the outer peripheral surface, and the second connecting piece has a first jig hooking portion formed on the outer peripheral surface.
The fluid device connection jig has a common hooking portion that engages with the first jig hooking portion, and a first locking position hooking portion and a second engaging portion that engage with the second jig hooking portion. To have a stop position hook,
The first locking position hooking portion and the second locking position hooking portion are formed at both ends of a rotating member rotatably held by the fluid device connecting jig.
A fluid equipment connection jig featuring. In the fluid equipment connecting jig used for the connecting member according to any one of claims 1 to 8 .
The fluid device connecting jig engages the first connecting piece with the second connecting piece by inserting the connecting member from the same direction as the direction in which the connecting member is attached to the first connecting portion and the second connecting portion. To let
A fluid equipment connection jig featuring. A fluid device connection structure including the connecting member according to any one of claims 1 to 8 .

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