KR102481101B1 - Coupling member, fluid-device connecting jig and fluid-device connecting structure - Google Patents

Abstract

[Problem] It is an object of the present invention to provide a fluid device connection structure that enables an urgent response when liquid leakage occurs and that can be installed in a small space and has good workability.
[Solution] The first fluid device 2 having the first connection portion 21, the second fluid device 3 having the second connection portion 31, the first connection portion 21 and the second connection portion 31 In a fluid device connection structure (1) having an annular seal member (4) connecting a ) and a connection member (5) maintaining a connected state of a first connection portion (21) and a second connection portion (31), the connection member (5) is provided with a first connection piece (6) and a second connection piece (7), the first hinge portion 63 and the second hinge portion at one end of the first connection piece (6) and the second connection piece (7) 73, the outer shape of the first connecting portion 21 and the second connecting portion 31 is circular, the first connecting piece 6 is substantially U-shaped with an opening 6a, and the first connecting portion The 1st connection part 21 part and the 2nd connection part 31 contact|connect more than 180 degree of the whole circumference of (21) and the 2nd connection part 31.

Description

Connection member, fluid device connection jig and fluid device connection structure {COUPLING MEMBER, FLUID-DEVICE CONNECTING JIG AND FLUID-DEVICE CONNECTING STRUCTURE}

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 sealing member connecting the first connecting portion and the second connecting portion, and a connected state of the first connecting portion and the second connecting portion. It relates to a connecting member used in a fluid device connection structure having a connecting member holding a.

Conventionally, in the control of liquid chemicals used in semiconductor manufacturing processes and liquid crystal manufacturing processes, valves such as flow control valves and on/off valves, filters, sensors such as pressure sensors and flow sensors, piping blocks such as joint blocks and flow paths, etc. , fluidic devices are used. In recent years, for the purpose of miniaturization of an apparatus, connecting parts of these fluid devices are directly connected to each other using a connecting member to form a unit.

Fig. 33 is a cross-sectional view of a connecting member 106 of a conventional fluid device connecting structure in a normally used state. Fig. 34 is a cross-sectional view of a state in which the fastening force of the connecting member 106 of the conventional fluid device connecting structure is increased.

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 ends (first engagement portions) of the first connection piece 107 and the second connection piece 108 are rotatably engaged via a support shaft 111 . On the other hand, the other ends (second engaging portions) of the first connecting piece 107 and the second connecting piece 108 are hooked hooks 108e protruding from the first extension portion 108c of the second connecting piece 108. ) is inserted into the insertion hole 107e formed in the second extension portion 107c of the first connection piece 107 while elastically deforming it, and then the locking claw 108e is restored to the second extension portion ( The connected state is maintained by engaging with 107c). This connection state is a normal use state in which the connecting parts are connected to each other by the connecting member 106 .

The connecting portion, the annular sealing member, and the first and second connection pieces 107 and 108 are made of resin. For this reason, for example, when an abnormally high-temperature chemical solution and an abnormally low-temperature pure water are alternately applied to the connection part for a long period of time, the connection part may creep deform and the sealing force may decrease. When the sealing force is lowered, leakage occurs. In such an emergency, tightening force increase is performed.

The connecting member 106 is provided with a fastening force increasing 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.

The fastening force increasing member 110 is inserted through the insertion hole 107d of the first linking piece 107 and fastened to the bolt hole 108d of the second linking piece 108, so that the first and second linking pieces 107 and 108 ) to bring them closer to each other. Therefore, the connecting member 106 is fastened using the fastening force increasing member 110, thereby improving 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 supporting shaft 111 for integrating the first connecting piece 107 and the second connecting piece 108 and the connecting member 106 are closed. In order to install the first extension installation portion 108c and the second extension installation portion 107c formed on the outer side in the radial direction, the connecting member 106 itself becomes large.

Alternatively, since the second engaging portion for increasing fastening force as a safety mechanism is provided radially outward, the connecting member 106 itself becomes large. As a result, a wide working space for installing the connecting member 106 is required.

Alternatively, as shown in FIG. 35, when a plurality of fluid devices are installed in parallel on the installation surface 300, in particular, the work space of the central fluid device is limited to the side opposite to the installation surface 300, and the conventional connection In the member 106, if the connecting member 106 is attached to the fluid equipment 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 installed, the hand is inserted from the direction opposite to the insertion direction to make it a normal use state, so the locking claw 108e cannot be engaged, and the tightening force is increased. However, since it is not possible to work in a narrow space where hands cannot enter all the way, there was a problem that workability deteriorated.

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

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 connecting portion, a second fluid device having a second connecting portion, an annular sealing member disposed between the first connecting portion and the second connecting portion, and the first connecting portion via the annular sealing member; A connecting member used in a fluid device connecting structure having a connecting member connecting a second connecting portion, wherein the connecting member includes a first connecting piece and a second connecting piece, and a pivot connecting portion at one end of the first connecting piece and the second connecting piece. , the outer shape of the first connecting portion and the second connecting portion is circular, the first connecting piece is approximately U-shaped with an opening, and extends beyond 180 degrees around the entire circumference of the first connecting portion and the second connecting portion. 2 It is characterized in that the connecting piece and the engaging coupling.

(2) In the connecting member described in (1), the size of the opening is formed smaller than the diameter (outer diameter) of each tubular portion of the first connecting portion and the second connecting portion, and the first connecting piece comprises the first connecting portion and the second connecting portion. It is characterized in that it can be deformed so as to widen outside the difference between the diameter of each tubular part of the 2 connection part and the size of the opening part.

(3) The connecting member described in (1) or (2) is characterized in that a thin portion having a notch is formed in the first connecting piece.

(4) In the connecting member described in any one of (1) to (3), a resistance generating portion for preventing self-weight rotation is formed in the pivot connecting portion of the first connecting piece and the second connecting piece, and an inner circumferential surface of the second connecting piece. And, on the surface in contact with the first connection portion and the second connection portion, a portion that does not come into contact with the first connection portion and the second connection portion is formed.

characterized by

(5) The connecting member described in any one of (1) to (4), characterized in that a T- or L-shaped detachable and engaging portion is formed on the outer periphery of the first connecting piece.

(6) The connecting member described in any one of (1) to (5), characterized in that a rotation action portion is formed on the outer periphery of the second connecting piece.

(7) In the connecting member described in any one of (1) to (6), at a position facing the outer circumferential portion of the first connecting portion of the first connecting piece and at a position facing the outer circumferential portion of the second connecting portion of the first connecting piece, Each is characterized in that convex projections are formed.

(8) In the connecting member described in (7), convex projections are formed at positions facing the outer periphery of the first connecting portion of the second connecting piece and at positions facing the outer circumferential portion of the second connecting portion of the second connecting piece, respectively. It is characterized by being.

(9) In the coupling member described in any one of (1) to (8), the other end of the first coupling piece has a first locking portion, and the other end of the second coupling piece has a first locking portion. A first locking accommodating portion to be engaged is provided, the connecting member is positioned at a first engaging position where the first engaging portion and the first engaging receiving portion are engaged, and the connecting member comprises: It is characterized in that there is a second locking position closer in the direction of the annular seal member than when it is at the position.

(10) In the connecting member described in (9), the first engagement position is a normal use state, and the second engagement position is a fastening force increasing state.

(11) In the fluid equipment connecting jig used for the connecting member according to any one of (1) to (10), the first connecting piece has a second jig hooking portion formed on the outer circumferential surface, and the second connecting piece is formed on the outer circumferential surface. A jig having a jig hooking portion and a fluid equipment connecting jig include a common hooking part that engages with the first jig hooking part, a first hooking position hooking part and a second hooking part that engages with the second jig hooking part. It is characterized by having a position locking part.

(12) In the fluid device connecting jig used for the connecting member according to any one of (1) to (10), the fluid device connecting jig is directed in the same direction as the direction in which the connecting member is attached to the first connecting portion and the second connecting portion. It is characterized in that the first connection piece and the second connection piece are engaged by being inserted from the.

(13) In the fluid device connecting jig used for the connecting member according to any one of (1) to (10), the fastening force is increased when the fluid device connecting jig is attached to the connecting member. .

(14) It is characterized by a fluid device connection structure including the connecting member according to any one of (1) to (10).

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 is substantially U-shaped with an opening, and the first connecting piece 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. For this reason, the engaging portion is not provided on the outer side of the connecting member in the radial direction, and the connecting member itself is formed compactly. Therefore, it can be installed even when there is no space because tubular parts or wall surfaces are adjacent to each other where a large number of fluid devices are installed in parallel, and workability is good.

According to the configuration of (2) above, the size of the opening of the first connection piece is formed smaller than the diameter (outer diameter) of each tubular portion of the first connection portion and the second connection portion, and the first connection piece is formed to be smaller than the first connection portion and the second connection portion. Since the difference between the diameter (outer diameter) of each tubular portion and the size of the opening can be deformed so as to widen outward, when attached to the first connecting portion and the second connecting portion, the first connecting piece widens outward by a certain length, and the first connecting piece And since it can be temporarily fixed by inserting into the second connecting portion, it is difficult to come off even when its own weight or external force is applied after inserting, and workability is good.

According to the configuration of (3) above, since the thin portion having the cutout 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 thin portion is elastically deformed with an appropriate intensity. , the opening can be expanded, and since the opening is closed after attachment, the operator can wear it with an appropriate attachment force while feeling an appropriate attachment feeling, and it is difficult to come off after attachment, resulting in good workability.

According to the configuration of (4) above, since a portion where the first connection portion and the second connection portion do not come into contact is formed on the inner circumferential surface of the resistance generating portion of the first connection piece and the second connection piece and the second connection piece, the second connection piece; The first connection part and the second connection part do not interfere. In addition, since there is a range in which it can rotate freely and frictional resistance is generated there, it is easy to work on the position of the second linking piece after the first linking piece is attached until the second linking piece is engaged. It can be temporarily fixed in position, so workability is good.

According to the structure of (5) above, since the attachment/detachment locking portion is formed on the outer periphery of the first linking piece, the attachment/detachment/locking portion can be picked up, and furthermore, the jig is engaged with the attachment/detachment/locking portion to press or pull. , Since it becomes easy to attach or remove the connecting member, the workability is good.

According to the configuration of (6) above, since the rotation action portion is formed on the outer periphery of the second connecting piece, by applying a load to the rotation action portion from the same direction as the direction in which the connection member is attached to the first connection portion and the second connection portion, 2 The connection piece can be rotated, so the workability is good.

According to the configuration of the above (7) or (8), the following effects are exhibited. That is, the front end of the first locking part of the first connecting piece and the front end of the first locking receiving part of the second connecting piece normally abut and engage 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 distal end and the distal end cannot be engaged. This state does not affect the sealing force, but there is a possibility that the user feels that the attachment is not completed when viewed. According to the configuration of (7) above, convex projections are formed at positions facing the outer periphery of the first connecting portion of the first connecting piece and at positions facing the outer circumferential portion of the second connecting portion of the first connecting piece, respectively. Further, according to the configuration of (8) above, convex projections are provided at positions facing the outer periphery of the first connecting portion of the second connecting piece and opposite to the outer circumferential portion of the second connecting portion of the second connecting piece, respectively. Since it is characterized in that it is formed, since the first connecting piece and the second connecting piece are pressed outward in the radial direction by the first connecting portion and the second connecting portion, the gap between the tip ends is eliminated and they can be engaged reliably. do.

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 applied for a long period of time to the connection part, the sealing force is lowered and leakage occurs, etc., Since there is a second locking position, by making the second locking position closer in the direction of the annular seal member, it is possible to increase the bonding force between the first connecting portion and the second connecting portion, and to take immediate action when leakage occurs. .

According to the configuration of (11) above, the first connection piece and the second connection piece can be connected to both the first engagement position and the second engagement position by using the fluid device connection jig.

According to the configuration of (12) above, since the first connecting piece and the second connecting piece can be engaged by inserting the fluid device connecting jig from the same direction as the direction in which the connecting member is attached to the first connecting portion and the second connecting portion, the first connecting piece and the second connecting piece can be engaged. It is possible to work only from the inside, and it is possible to work easily even in a narrow space where a large number of fluid devices are installed in parallel, and the workability is good.

According to the configuration of (13) above, since the clamping force increasing state can be easily confirmed from the outside by the fluid equipment connecting jig being installed on the connecting member, the fluid equipment in the clamping force increasing state can be found at a glance during maintenance. It can respond, and workability is good.

1 is a perspective view of a connecting member in a first locking position;
Fig. 2 is a perspective view of a connecting member in a first locking position;
3 is a perspective view of a connecting member in a first locking position;
Fig. 4 is a perspective view of the connecting member in a first locking position;
Fig. 5 is a perspective view of the connecting member before engagement.
6 is a AA cross-sectional view of FIG. 1 .
7 is a BB cross-sectional view of FIG. 5;
8 is a diagram showing a relationship between a connecting member and a fluid device.
Fig. 9 is a front view showing a state in which connecting members are installed in fluid devices installed in parallel;
10 is a perspective view of a fluid device connection jig.
11 is a CC sectional view of FIG. 10 .
Fig. 12(a) is an exploded view of the first fluid device, the second fluid device, and the 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 connection member is inserted into the connection state of the first fluid device, the second fluid device, and the annular seal member. (d) shows a state in which the connecting member is set to the first engaging position in the connected state of the first fluid device, the second fluid device, and the annular seal member.
Fig. 13(a) is a perspective view showing a state before engaging a connecting member with a jig. (b) is a perspective view showing a state in the middle of engaging the connecting member with a jig. (c) is a perspective view showing a state in which the connecting member is set to the first engaging position by the jig.
Fig. 14 is a perspective view of a state in which the connecting member is placed in a second engaging position by means of a jig;
Fig. 15(a) is a front view showing a state before engaging the connecting member with a jig. (b) is a front view showing a state in the middle of engaging the connecting member with the jig. (c) is a front view showing a state in which the connecting member is set to the first engaging position by the jig.
FIG. 16 shows an enlarged view of section E of FIG. 15 .
Fig. 17 is a front view showing a state in which the connecting member is placed in a second engaging position by means of a jig;
Fig. 18(a) is a partial cross-sectional view showing a state before the connecting member is engaged with a jig. (b) is a partial cross-sectional view showing a state in the first middle of engaging the connecting member with the jig. (c) is a partial cross-sectional view showing a state in the second middle of engaging the connecting member with the jig. (d) is a partial cross-sectional view showing a state in which the connecting member is set to the first engaging position by the jig.
Fig. 19(a) is a partial sectional view showing a state in the middle of setting the connecting member to the second locking position with the jig. (b) is a partial cross-sectional view showing a state in which the connecting member is set to the second engaging position by the jig.
Fig. 20 is a front view of installing connecting members in a state where fluid devices are installed in parallel;
Fig. 21 (a) is a perspective view showing a state where the jig is hung on the connecting member when the connecting member is removed. (b) is a perspective view showing a state in which the connecting member is removed by pulling out the jig.
Fig. 22(a) is a front view showing a state where the jig is hung on the connecting member when the connecting member is removed. (b) is a front view showing a state in which the connecting member is removed by pulling out the jig.
23 is a DD cross-sectional view of FIG. 12(d).
FIG. 24 is an enlarged view of portion K of FIG. 23 .
Fig. 25 is a top view showing a state in which connecting members are installed in fluid devices installed in parallel;
26 is a front view of a connecting member.
27 is a rear view of the connecting member.
28 is a plan view of a connecting member.
29 is a bottom view of the connecting member.
30 is a left side view of the connecting member.
Fig. 31 is a right side view of the connecting member;
32 is a perspective view of a connecting member;
33 is a cross-sectional view of a connecting member in a first locking position of a conventional fluid device connection structure.
34 is a cross-sectional view of a connecting member in a second locking position of a conventional fluid device connecting structure.
Fig. 35 is a front view showing a state in which conventional connecting members are installed in fluid devices installed in parallel;
Fig. 36 is a cross-sectional view of a first connecting piece in another embodiment.
37 is a cross-sectional view of a second connecting piece in another embodiment.
Fig. 38 is an enlarged view of part I of Fig. 36;
39 is a cross-sectional view of the RR of FIG. 38;
Fig. 40 is an enlarged view of section J of Fig. 36;
41 is a TT cross-sectional view of FIG. 40;
Fig. 42 is an enlarged view of section Q of Fig. 37;
43 is a UU sectional view 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 from various angles of the connecting member 5 in the first locking position. Fig. 5 shows a perspective view of the connecting member 5 in a state before engagement. FIG. 6 shows a cross-sectional view AA of FIG. 1 , and FIG. 7 shows a cross-sectional view BB of FIG. 5 . 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 connecting members are installed in 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. As shown in FIG. (b) shows the state in which the 1st fluid device 2, the 2nd fluid device 3, and the annular seal member 4 were connected. (c) shows a state in which the connection member 5 is inserted into the connection 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 first fluid device 2, the second fluid device 3, and the annular seal member 4 are connected with the connecting member 5 in the first engaging position.

In FIG. 13, (a) is a perspective view showing a state before engaging the coupling member 5 by the jig 8. As shown in FIG. (b) shows a state in the middle of engaging the connecting member 5 by the jig 8 in a perspective view. (c) is a perspective view showing a state in which the connecting member 5 is placed in the first locking position by the jig 8. FIG. 14 is a perspective view showing a state in which the connecting member 5 is placed in the second locking position by the jig 8. As shown in FIG. Here, the normal use state is shown in the first engagement position of the connecting member 5, and the fastening force increasing state is shown in the second engagement position. Fig. 15 corresponds to Fig. 13, and Figs. 15(a) to (c) show front views of Figs. 13(a) to (c). FIG. 16 shows an enlarged view of section E in FIG. 15 . FIG. 17 corresponds to FIG. 14 and shows a front view of FIG. 14 .

In FIG. 18 , (a) shows a state before engaging the connecting member 5 by the jig 8 as a partial cross-sectional view. (b) shows a partial cross-sectional view of a state during the first engagement of the connecting member 5 by the jig 8. (c) shows a partial cross-sectional view of a state during the second engagement of the connecting member 5 by the jig 8. (d) is a partial sectional view showing a state in which the connecting member 5 is placed in the first engaging position by the jig 8. In FIG. 19 , (a) shows a state in the middle of setting the connecting member 5 to the second locking position by the jig 8 in a partial cross-sectional view. (b) shows a state in which the connecting member 5 is placed in the second locking position by the jig 8 as a partial cross-sectional view.

13 to 19, in order to more clearly show the relationship between the connecting member 5 and the jig 8, the first fluid device 2, the second fluid device 3, and the annular sealing member ( 4) is omitted. In addition, in FIG. 18 and FIG. 19, in order to clearly show the action|action of the jig 8, drawing of the concave part 6b, 7a of the coupling member 5 is abbreviate|omitted. Fig. 20 shows a front view in which connecting members are installed in a state where fluid devices are installed in parallel.

Further, the connecting member 5 of FIGS. 26 to 31 shows six side views of the connecting member 5 of FIGS. 1 to 4 . Specifically, FIG. 26 is a front view of the coupling member 5, FIG. 27 is a rear view, FIG. 28 is a top view, FIG. 29 is a bottom view, FIG. 30 is a left view, and FIG. 31 is a right view. The connecting member 5 of FIG. 32 shows a perspective view of the connecting member 5 of FIGS. 1 to 4 . However, the connection member 5 of FIGS. 26 to 32 is different from the connection member 5 of FIGS. 1 to 4 in that chamfering is formed as a whole.

(Configuration of fluid equipment connection structure)

First, the overall configuration of the fluid device connection structure 1 will be described using FIG. 23 . Fig. 23 is a DD cross-sectional view of Fig. 12(d). Fig. 24 is an enlarged view of section K in Fig. 23;

As shown in FIG. 23, the fluid device connection structure 1 connects the first connection portion 21 of the first fluid device 2 and the second connection portion 31 of the second fluid device 3 to an annular sealing member. It is connected through (4). Connecting members 5 are installed on the outer circumferences 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 external shape of the 1st connection part 21 and the 2nd connection part 31 is comprised in 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 . Further, the tubular portions 28 and 38 include flange adjacent portions respectively adjacent to the flange portions 25 and 35 described later.

As shown in FIG. 24, the annular sealing member 4 is provided on the body portion 43, the protruding portion 44 protruding in the outer circumferential direction from the outer peripheral surface of the body portion 43, and the outer peripheral edge of the protruding portion 44. A gripping part 45 is provided. In the body portion 43, annular seal grooves 46 and 47 are formed. The annular sealing member 4 is made of a relatively hard and corrosion-resistant fluororesin such as PFA or PTFE (in addition, in the cross section of the annular sealing member 4 in FIGS. 23 and 24, for ease of viewing, It is indicated by hatching in a pattern different from that of the connecting member 5 made of resin).

An end surface 22 is formed on the surface of the first connecting portion 21 on which the annular sealing member 4 is attached. The end face 22 is formed with an engaging convex portion 27 protruding outward in the radial direction of the first connecting portion 21 . On the inside of the end surface 22 in the radial direction, a press-fitting portion 24 fitted into the annular seal groove 46 of the body portion 43 of the annular seal member 4 is formed. Further, in the first connecting portion 21, on the outer circumferential surface opposite to the end face 22 in the axial direction of the flow path 29, an annular mounting groove 23 for attaching the connecting member 5 is provided adjacent to the flange. is formed by A flange portion 25 is provided between the end face 22 and the mounting groove 23 . A connection-side tapered surface 26 is formed on the flange portion 25 .

An end face 32 is formed on the surface of the second connecting portion 31 on which the annular seal member 4 is attached. On the end face 32, an engaging convex portion 37 protruding outward in the radial direction is formed. A press-fitting portion 34 attached to the annular seal groove 47 of the main body portion 43 is formed on the inside of the end face 32 in the radial direction. On the outer circumferential surface in the direction of the flow path 39, a mounting groove 33 for attaching the connecting member 5 is annularly formed in the adjacent portion of the flange. A flange portion 35 is provided between the end face 32 and the mounting groove 33 . A connection-side tapered surface 36 is formed on the flange portion 35 .

(Configuration of connecting member)

The connection internal structure which connects the 1st fluid device 2 and the 2nd fluid device 3 of the connection member 5 is demonstrated.

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 with strength and corrosion resistance (in addition, the cross section of the first connecting piece 6 and the second connecting piece 7 in FIG. 6 and the like , In order to make it easier to see, it is indicated by slanted lines in a pattern different from the hatching usually used in resin (Fig. 23). The first connecting piece 6 and the second connecting piece 7 have inner peripheral surfaces formed in an arc shape so as to be installed along the outer circumferences of the first connecting portion 21 and the second connecting portion 31 . In the axial direction of the flow paths 29 and 39 of the annular seal member 4 mounted between the first connecting portion 21 and the second connecting portion 31, the first connecting portion 21 and the second connecting portion 31 are separated from each other. Resisting the force acting to separate them, the connecting member 5 maintains the connected state of the first connecting portion 21 and the second connecting portion 31 .

As shown in FIG. 23, the connecting member 5 arranges the first protruding portion 60 of the first connecting piece 6 and the first protruding portion 70 of the second connecting piece 7 in the mounting groove 23, , The second projection 61 of the first connection piece 6 and the second projection 71 of the second connection piece 7 are disposed in the mounting groove 33. The first connecting piece 6 of the connecting member 5 is connected to a position corresponding to the connection-side tapered surface 26 of the first connection portion 21 and the connection-side taper surface 36 of the second connection portion 31, respectively. Side tapered surfaces 60a and 61a are formed. Since the connection structures of the first connection piece 6 and the second connection piece 7, and the first connection portion 21 and the second connection portion 31 of the connection member 5 are vertically symmetrical as shown in FIG. 23, By explaining the connection structure of the first connection piece 6, description of the connection structure of the second connection piece 7 is omitted.

Next, a more detailed external configuration of the connecting member 5 will be described using FIGS. 1 to 9 . In addition, although the codes of A and B are attached to a pair, the codes of A and B are abbreviate|omitted suitably in order to make description complicated.

As shown in FIG. 7 , the first connecting piece 6 of the connecting member 5 has a substantially U-shape with 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 of the entire circumference of the connecting member 5, in other words, a position exceeding 180 degrees of the entire circumference of the circular cross section of the first connecting portion 21 and the second connecting portion 31. It engages with the second connecting piece 7 from one position. The second connecting piece 7 is shaped to cover the opening 6a of the first connecting piece 6 . On the surfaces of the first connecting piece 6 and the second connecting piece 7 in the axial direction, a plurality of concave portions 6b and 7a concave in the axial direction are radially formed. As shown in Fig. 2, an end portion 65 is formed at one end of the first connecting piece 6 in the circumferential direction, and a first hinge portion 63 is formed at both ends of the end portion 65 in the axial direction. A second hinge part 73 is formed at one end of the second connection piece 7 in the circumferential direction, and is rotatably engaged with the first hinge part 63 . The display convex part 63a is formed in the outer periphery of the 1st hinge part 63 along the axial direction. In addition, a display convex portion 73a is formed on the outer periphery of the second hinge portion 73 along the axial direction. As shown in FIG. 2, it can be seen that the display convex portion 63a and the display convex portion 73a are in a normal engaging position by visually or tactilely confirming that they are in a straight line. In addition, the 1st hinge part 63 and the 2nd hinge part 73 of this embodiment are an example of the "rotation connection part" of this application.

5, at the other end of the circumferential direction of the first connecting piece 6, a pair of first locking portions 64 (64A, 64B) are provided at both ends of the connecting member 5 in the axial direction. It is erected and installed facing the second connecting piece 7. In addition, since the 1st locking part 64A, 64B has the same shape, it describes as the 1st locking part 64 below. The front end of the first locking portion 64 is formed with a front end portion 64aa bent outward in the radial direction.

It is the inner circumferential surface of the first connecting piece 6, and there is a partial cutout 69a in the center, and a thin portion 69 formed thinly is formed on the outer periphery of the first connecting piece 6. On the outer circumferential surface of the first connecting piece 6, a pair of T-shaped attaching and detaching fixing portions 68 (68A, 68B) are formed at positions corresponding to the thin portion 69. A convex portion 66 is formed on the outer circumferential surface of the first connecting piece 6 on the side of the first locking portion 64 . In the convex portion 66, a concave portion 66a, which is the other end in the circumferential direction of the first linking piece 6 and is recessed at the center in the axial direction, is formed. It can be seen that the concave portion 66a overlaps with the protruding portion 76 of the second linking piece 7 to be described later, thereby increasing the fastening force. The convex portion 66 is formed with a gently curved portion 66b toward the detachable locking portion 68 . A second jig engaging portion 66c is formed between the curved portion 66b and the detachable engaging portion 68 . The second jig locking portion 66c protrudes toward the detachable locking portion 68. A jig engaging surface 66d is formed on the opposite side of the curved portion 66b of the second jig engaging portion 66c. It is the 1st connecting piece 6, and the recessed part 6c is formed over the whole circumference at both ends in the axial direction. The concave portion 6c is formed one size smaller than the convex portion 66 . As shown in FIG. 20 , even when fluid equipment is installed in parallel, the jig 8 can be more entered into the connecting member 5 by the concave portion 6c, and the contact with the adjacent connecting member 5 interference can be avoided.

As shown in FIG. 5, at the other end of the second linking piece 7 in the circumferential direction, at both ends in the axial direction of the linking member 5, first locking portions 64 (64A, 64B)) and a pair of first engagement accommodating portions 75 (75A, 75B) engaging with each other are erected facing the first connection piece 6. In addition, since the 1st locking accommodating part 75A, 75B has the same shape, it describes as the 1st latching accommodating part 75 below. The front end of the first locking accommodating portion 75 is formed with a front end portion 75aa bent radially inward. In addition, it is an inner circumferential surface of the second connecting piece 7, and a chamfer portion ( 7c) is formed. Since a taper is formed in the chamfer 7c and interference between the flange portion 25 of the first connection portion 21 and the flange portion 35 of the second connection portion 31 shown in FIG. 24 can be avoided, as will be described later. The second connection piece 7 can be brought close to the first connection piece 6 smoothly to the position where the jig 8 is hung.

The front end 64aa of the first locking portion 64 and the front end 75aa of the first locking accommodating portion 75 engage as shown in FIG. 16 . This is the first locking position. In this state, an elastic force always acts on the first locking receiving portion 75 toward the first locking portion 64 side. Therefore, since the distal end 64aa and the distal end 75aa are engaged in a flat plane, when a force for peeling off the connecting member 5 acts, the distal end 64aa and the distal end 75aa are respectively bitten and do not fall out. can keep it from happening. In the first locking position, there is a gap X between the tip 75aa of the first locking accommodating portion 75 and the first locking portion 64, and the tip of the first locking portion 64 ( 64aa) and the first locking accommodating portion 75, a gap Y is formed. Due to the gap X and the gap Y, the distal end 64aa and the distal end 75aa can engage reliably.

As shown in Fig. 1, between the first locking receiving portions 75A and 75B of the second linking piece 7, one extension portion 78 extends outward in the radial direction. At the center of the front end of the extension portion 78, a protrusion 76 is erected in the direction of the first connection piece. On the opposite side of the protruding portion 76 of the extension installation portion 78, a first jig engaging portion 77 protrudes in the axial direction.

On the side of the second hinge portion 73 of the second coupling piece 7, as shown in FIG. 2, a rotation action portion 74 is formed on the outer peripheral surface so as to protrude outward in the radial direction. As shown in FIG. 7, when the first connection piece 6 and the second connection piece 7 are opened, the rotation action portion 74 engages with the end portion 65 of the first connection piece 6, and It is made not to rotate the 2 connection piece 7 more than a fixed level. In addition, at this time, as shown in the fourth connecting member 5 from the right side of FIG. 20 (FIG. 20(e)), by pressing the rotation action part 74 with the jig 8 from one direction, 1 The second connecting piece 7 may be rotated in a direction in which the locking portion 64 and the first holding receiving portion 75 come close to each other.

Further, in the vicinity of the first hinge portion 63 of the first connection piece 6, a first resistance protrusion 6d is formed on the inner peripheral side of the end portion 65. In the vicinity of the second hinge portion 73 of the second connection piece 7, a second resistance protrusion 7b is formed to abut against the first resistance protrusion 6d. When the first resistance protrusion 6d and the second resistance protrusion 7b come into contact, they are rubbed and a frictional force is generated, preventing rotation by its own weight and temporarily fixing it. In addition, the first resistance projection 6d and the second resistance projection 7b of the present embodiment are examples of the "resistance generating unit" of the present application.

(Configuration of jig)

Next, the configuration of the fluid equipment connection jig 8 (hereinafter simply referred to as a jig) will be described using FIGS. 10 and 11 . 10 shows a perspective view of the jig 8. FIG. 11 shows a CC sectional view of FIG. 10 .

The jig 8 has a thin rectangular shape. One end in the longitudinal direction of the jig 8 (upper end in FIG. 10) has a pair of detachable and detachable holding portions 81A and 81B engaged with the detachable and detachable locking portions 68A and 68B of the coupling member 5. is formed The attachment/detachment locking accommodation portions 81A, 81B are formed protruding from both ends in the width direction of the jig 8 toward the center. A protruding portion 81aa is formed between the attaching and detachable locking accommodating portions 81A and 81B. Further, at one end of the jig 8 in the longitudinal direction, a stopper 81bb is formed between the attaching and detaching accommodating portions 81A and 81B and extends beyond the protruding portion 81aa.

The other end in the longitudinal direction of the jig 8 (lower end in FIG. 10) is formed with a first penetrating portion 82 having a square shape, and is the first penetrating portion 82, and is the other end in the longitudinal direction of the jig 8. A common hooking portion 82a is formed at a position corresponding to the end portion. Next to the first penetrating part 82, a second penetrating part 83 of a square shape is formed in the center of the jig 8, and the rotation member ( 84) and integral support shaft 86 are rotatably held. One end of the pivoting member 84 is formed with a first engaging position engaging portion 84a formed with a round shape. The other end of the rotation member 84 is formed with a second locking position locking portion 84b having a smaller width than the first locking position locking portion 84a. 11, the length L1 from the tip of the first locking position engaging portion 84a to the central axis of the support shaft 86 is from the tip of the second locking position engaging portion 84b to the central axis of the support shaft 86. It is formed shorter than the length L2 of the support shaft 86 to the central axis. A pair of convex portions 83b are formed in the second penetrating portion 83 at both ends in the width direction of the jig 8 (see FIG. 22) on the side close to the attachment/detachment holding portions 81A, 81B. there is. Due to the presence of the convex portion 83b, the second engaging portion 84b of small width can pass through the inside of the second penetrating portion 83 (between the pair of convex portions 83b). , the wide first locking position locking portion 84a abuts against the convex portion 83b and cannot pass through, so that the rotation of the pivoting member 84 is controlled. On the side of the second locking position locking portion 84b of the pivot member 84, a branching portion 84c is erected. A removable bridge 85 is formed between the first through portion 82 and the second through portion 83 .

(Action of fluid device connection structure)

A normal use state in which the connecting member 5 is set to the first engaging position from the initial state will be described using Figs. 12 to 13, Figs. 15 to 16, and Fig. 18 . The normal use state refers to a state in which the connecting member 5 is installed at the first locking position, as shown in Fig. 12(d). At the first engagement position, the first engagement portion 64 of the first connection piece 6 is engaged with the first engagement receiving portion 75 of the second connection piece 7 .

First, as shown in (a) and (b) of FIG. 12, an annular sealing member 4 is placed between the first fluid device 2 and the second fluid device 3, and a jig (not shown) is placed. After press-fitting the annular seal member 4 into the first fluid device 2 and the second fluid device 3 to make a temporary connection, as shown in FIG. 12(c), the connecting member 5 It is inserted so that the concave part 6b of the is not visible. At this time, as shown in FIG. 8 , the size N of the opening 6a of the first connecting piece 6 is the tubular portion 28 of the first connecting portion 21 and the tubular portion 38 of the second connecting portion 31. ) is formed smaller than the diameter (outer diameter) P. In particular, when the thin portion 69 of the first connecting piece 6 is elastically deformed, the first connecting piece 6 is attached to the tubular portion 28 of the first connecting portion 21, the diameter of the tubular portion 28 It extends outward by the difference M in the size of the opening 6a from P, and can fit into a portion exceeding 180 degrees around the entire circumference of the first connecting portion 21 and the second connecting portion 31. Then, as shown in (d) of FIG. 12, the second connecting piece 7 is engaged with the first engaging position of the first connecting piece 6, and the connection in normal use is completed. At this time, the concave portions 6b and 7a of the connecting member 5 are not visible. Since the concave portions 6b and 7a are covered by the first connecting portion 21 and the second connecting portion 31 and are not visible from the outside, it can be confirmed that they are connected at the correct position.

In addition, installation of the connecting member 5 in a narrow space where hands cannot enter to the back as shown in FIG. 9 will be described using FIG. 20 . Fig. 20(a) shows a connection completion state in normal use. The connection procedure is shown in order from (b) to (h) in FIG. 20 . As shown in (b) of FIG. 20 , a tubular portion ( 28) borrow between As shown in (c) of FIG. 20 , the second connection piece 7 is rotated to the tubular portion 28 side in advance, and the first connection piece 6 is connected to the first connection portion 21 and the second connection portion 31. ) is mounted on As shown in (d) of FIG. 20 , when the first connecting piece 6 is inserted into the tubular portion 28, the second connecting piece 7 abuts against the mounting surface 300, and the tubular portion 28 turn to the side As shown in (e) of FIG. 20, the elongated jig 8 is connected to the second connecting piece 7 from the tip of the jig 8 from the opposite side of the installation surface 300 on the side of the first hinge part 63. The rotation action part 74 is entered until it is extruded. As a result, the second connecting piece 7 rotates with the second hinge portion 73 as a support point, bringing the first locking accommodating portion 75 closer to the first connecting piece 6, so that the first resistance protrusion 6d ) and the second resistance protrusion 7b contact, it can be temporarily fixed at that position by the frictional force generated by rubbing. As shown in (f), (g) and (h) of FIG. 20, the elongated jig 8 is borrowed from the opposite side of the installation surface 300 on the side of the first locking part 64 to pull up During the operation, the second linking piece 7 is pulled up and engaged with the first linking piece 6.

Here, the procedures of (f), (g) and (h) in FIG. 20 will be described in detail using FIG. 18 . As shown in (a) and (b) of FIG. 18, the jig 8 is placed on the side of the connecting member 5 from the same direction as the direction in which the connecting member 5 is mounted. At this time, in order to allow the jig 8 to enter along the concave portion 6c of the connecting member 5, interference with the adjacent connecting member 5 can be avoided even if the fluid devices are arranged 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 in the first jig of the second connecting piece 7. It is engaged with the engaging part 77.

Next, tilt the jig 8 in the direction of the arrow F. As shown in (c) and (d) of FIG. 18, at the same time, when the second engagement position engagement portion 84b is also pushed in the direction of arrow F, the first engagement position engagement portion 84a moves to the first connecting piece. It is engaged with the second jig engaging portion 66c along the jig engaging surface 66d of (6). Thereby, the 1st latching part 64 and the 1st latching accommodating part 75 approach and engage, and are positioned at the 1st latching position. Then, the second locking position locking portion 84b of the jig 8 is pressed in the opposite side to the direction of arrow F, the jig 8 is released from the first jig locking portion 77, and the jig 8 is peeled off to normal. Connection in the use state is completed. At this time, a gap S is formed between the convex portion 66 of the first connecting piece 6 and the extension portion 78 of the second connecting piece 7, as shown in FIG. In addition, as shown in Fig. 6, the position of the tip of the protruding portion 76 coincides with the position of the end of the concave portion 66a, and by visually observing this position, it can be confirmed that the connection is in normal use.

In this way, the first connecting piece 6 and the second connecting piece 7 are formed by inserting the jig 8 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. can be engaged, it is possible to work from only one direction, and work can be performed easily even in a narrow space where a large number of fluid devices are installed in parallel, and the workability is good.

Next, a tightening force increasing state in which the coupling member 5 is moved 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 flowing the first connection part 21 and the second connection part 31 alternately and repeatedly for a long period of time by alternately flowing an abnormally high-temperature liquid (chemical liquid) and an abnormally low-temperature liquid (pure water). , The sealing force may be reduced, for example, when the annular sealing member 4 and the connection are made while foreign substances are bitten between the first connecting portion 21 and the second connecting portion 31. Leakage occurs when the sealing force decreases. In such an emergency, the tightening force of the connecting member 5 is increased.

For this fastening force increase, the distance to the support shaft 86 is longer than that of the first engaging position engaging portion 84a of the jig 8 used when setting the coupling member 5 to the first engaging position. The position locking part 84b is used. The bridge 85 of the jig 8 is removed to rotate the pivoting member 84 to use the second locking position locking portion 84b. In this way, the rotation member 84 can be rotated. By adding a procedure for removing the bridge 85, it is possible to prevent an accidental increase in fastening force.

As shown in (a) of FIG. 19 , the common engaging portion 82a of the jig 8 is engaged with the first jig engaging portion 77 of the second connecting piece 7 . Subsequently, the jig 8 is tilted in the direction of the arrow G. Simultaneously with this, when the first engagement position engagement portion 84a is also pushed in the direction of arrow G, the second engagement position engagement portion 84b is engaged with the second jig engagement portion 66c along the jig engagement surface 66d. are combined Further, the first locking position locking portion 84a abuts against the convex portion 83b and is positioned. Since the first locking position locking portion 84a is longer than the second locking position locking portion 84b, the direction of bringing the first linking piece 6 and the second linking piece 7 closer together according to the principle of a lever. A strong force works. At this time, while filling the gap S between the convex portion 66 of the first connection piece 6 and the extension installation portion 78 of the second connection piece 7, the first connection piece 6 and the second connection piece 7 come close to each other. do.

As shown in FIGS. 23 and 24, the first connection piece 6 of the connection member 5 corresponds to the connection-side tapered surfaces 26 and 36 of the first connection portion 21 and the second connection portion 31. Since the connection-side taper surfaces 60a and 61a are formed at the position of 26 and 36 are pressed, and the first connecting portion 21 and the second connecting portion 31 are pressed toward the annular seal member 4 side, so that leakage can be stopped. In addition, since the connection structure of the 2nd connection piece 7, the 1st connection part 21, and the 2nd connection part 31 is vertically symmetrical as shown in FIG. 23, the same as the 1st connection piece 6 is the 2nd connection piece The (7) side is also carried out.

In the state where the jig 8 is engaged with the connecting member 5 by the procedure so far, the positioning of the connecting member 5 at the second engaging position in the fastening force increasing state is completed.

In addition, the completion of the fastening force increase operation is notified to the operator by the jig 8 being positioned with respect to the connecting member 5 . Since the state in which the jig 8 is installed on the connecting member 5 indicates the state of increasing the clamping force, it is easy to confirm that the state of the clamping force is increased from the outside, so that the fluid equipment in the state of increasing the clamping force can be seen at a glance during maintenance. It is possible to respond such as searching, stopping the fluid, or exchanging the connecting member 5, and the workability is good.

Removal of the connecting member 5 will be described using FIGS. 21 and 22 . 21 , (a) shows a perspective view showing a state where the jig 8 is hung on the connecting member 5 when the connecting member 5 is removed. (b) is a perspective view of a state in which the jig 8 is pulled in and the connecting member 5 is removed. 22 , (a) shows a front view of a state in which the jig 8 is hung on the connecting member 5 when the connecting member 5 is removed. (b) is a front view of a state in which the jig 8 is pulled in and the connecting member 5 is removed.

The jig 8 is used to remove the connecting member 5. As shown in Fig. 21 (a) and Fig. 22 (a), the protrusion 81aa of the jig 8 is inserted between the pair of attaching and detaching fixing parts 68A and 68B of the connecting member 5. and slide the pair of detachable and detachable holding portions 81A and 81B of the jig 8 relative to the detachable and detachable locking portions 68A and 68B of the connecting member 5 to the stopper 81bb of the jig 8 Hook them together until they touch. After securely engaging the detachable and detachable holding portions 81A and 81B and the detachable and detachable locking portions 68A and 68B, the jig 8 is pulled in the direction of the arrow H, thereby first locking portion of the coupling member 5. The engagement between 64 and the first locking receiving portion 75 is released, so that the connecting member 5 can be removed from the first fluid device 2 and the second fluid device 3.

In addition, the connection member 5 can be installed by the reverse procedure to the procedure shown above.

Other embodiments of the connecting member 5 are shown in FIGS. 36 to 43 . 36 is a cross-sectional view of the first connection piece 6. 37 is a sectional view of the second connecting piece 7. Fig. 38 is an enlarged view of section I in Fig. 36, and Fig. 39 is a RR sectional view in Fig. 38. Fig. 40 is an enlarged view of section J in Fig. 36, and Fig. 41 is a TT sectional view in Fig. 40. Fig. 42 is an enlarged view of section Q in Fig. 37, and Fig. 43 is a UU sectional view in Fig. 42.

As shown in FIG. 36, the inner peripheral surface of the first connecting piece 6 and the position facing the connection-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, and a pair of convex protrusions at positions facing the connection-side tapered surface 36, which is the outer periphery of the flange portion 35. (93) and a pair of convex projections (94) are formed at opposing positions, respectively.

In addition, it is the inner circumferential surface of the second connecting piece 7, and a pair at a position opposite to the connection-side tapered surface 26, which is the outer periphery of the flange portion 25, and the connection-side tapered surface 36, which is the outer periphery of the flange portion 35 A convex-shaped protrusion 95 is formed.

The shapes of the pair of convex projections 91 are shown enlarged in FIGS. 38 and 39 . As shown in the figure, a pair of convex projections 91 are on the inner circumferential surface of the first linking piece 6, have a predetermined length in a direction along the inner circumferential surface, and protrude toward the inside of the connecting member 5 in the radial direction. has been The pair of convex projections 92 have the same shape as the pair of convex projections 91 .

The shapes of the pair of convex projections 93 are shown enlarged in FIGS. 40 and 41 . As shown in the drawing, the pair of convex projections 93 are on the inner circumferential surface of the first linking piece 6, have a predetermined length in a direction along the inner circumferential surface, and protrude toward the inside of the connecting member 5 in the radial direction. has been The pair of convex projections 94 have the same shape as the pair of convex projections 93 .

The shapes of the pair of convex projections 95 are shown enlarged in FIGS. 42 and 43 . As shown in the figure, a pair of convex projections 95 are on the inner circumferential surface of the second linking piece 7, have a predetermined length in a direction along the inner circumferential surface, and protrude toward the inside of the connecting member 5 in the radial direction. has been

Next, the action and effect of each pair of convex projections 91, 92, 93, 94, and 95 will be described.

As shown in FIG. 16, the distal end 64aa of the first engagement portion 64 of the first connection piece 6 and the distal end portion 75aa of the first engagement accommodating portion 75 of the second connection piece 7 ) are normally engaged with each other. However, due to the tolerance of the first linking piece 6 and the second linking piece 7, there is a possibility that a gap is generated between the abutting surfaces of the distal end 64aa and the distal end 75aa, making them unable to engage. This state does not affect the sealing force, but there is a possibility that the user feels that the attachment is not completed when viewed.

In this embodiment, it is the inner circumferential surface of the first connecting piece 6, and the position facing the connection-side tapered surface 26, which is the outer periphery of the flange portion 25, and the connection-side tapered surface 36, which is the outer periphery 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 respectively formed at positions opposite to ). It is also an inner circumferential surface of the second connecting piece 7, at a position opposite to the connection-side tapered surface 26, which is the outer periphery of the flange portion 25, and the connection-side tapered surface 36, which is the outer periphery of the flange portion 35 Since the pair of convex projections 95 are formed, the first connection piece 6 and the second connection piece 7 are pressed outward in the radial direction, so that a gap between the abutting surfaces of the tip portion 64aa and the tip portion 75aa is formed. The gap disappears and it is possible to engage securely.

In this embodiment, although five convex projections are formed, two, three, four, six or seven convex projections 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 connecting portion 21 and the second having the second connecting portion 31 Maintaining the connection state of the fluid device 3, the annular sealing member 4 connecting the first connection portion 21 and the second connection portion 31, and the first connection portion 21 and the second connection portion 31 In the connecting member (5) used in the fluid device connection structure (1) having the connecting member (5), the connecting member (5) has a first connecting piece (6) and a second connecting piece (7), and the first connecting piece (5) is provided. Having a first hinge portion 63 and a second hinge portion 73 at one end in the circumferential direction of the connecting piece 6 and the second connecting piece 7, and the first connecting portion 21 and the second connecting portion 31 The outer shape is circular, the first connecting piece 6 is substantially U-shaped with an opening 6a, and extends beyond 180 degrees of the entire circumference of the first connecting portion 21 and the second connecting portion 31 to form a second connecting piece 6. Since it is characterized in that it engages with the connecting piece 7, no engaging portion is provided on the outside of the connecting member 5 in the radial direction, and the connecting member itself is formed compactly. Therefore, even when there is no space because the tubular parts 28 and 38 in which a large number of fluid devices are installed in parallel or the wall surfaces are adjacent to each other, it can be installed and the workability is good.

(2) In the connecting member 5 described in (1), the size N of the opening 6a is the diameter P of each tubular portion 28, 38 of the first connecting portion 21 and the second connecting portion 31. The first linking piece 6 is the difference between the diameter P of the tubular portions 28 and 38 of the first connecting portion 21 and the second connecting portion 31 and the size of the opening 6a by M. Since it is characterized in that it can be deformed to widen outward, the first connecting piece 6 can be widened outward by a certain length and temporarily fixed by fitting into the first connecting part 21 and the second connecting part 31, so after fitting , It is hard to come off even when its own weight or external force is applied, and its workability is good.

(3) In the connecting member 5 described in (1) or (2), the thin portion 69 having the cutout portion 69a is formed in the first connecting piece 6, so that the first connecting piece 6 is formed. When the connecting piece 6 is attached to the first connecting portion 21 and the second connecting portion 31, the thin portion 69 causes an elastic deformation of an appropriate strength, so that the opening 6a can be expanded. Since the opening 6a is closed, the operator can wear it with an appropriate attachment force and while feeling an appropriate attachment feeling, and it is difficult to come off after attachment, and the workability is good.

(4) In the connection member 5 described in any one of (1) to (3), the first resistance protrusion for preventing self-weight rotation is provided in the pivot connection portion of the first connection piece 6 and the second connection piece 7. (6d) and the second resistance protrusion 7b are formed, the inner circumferential surface of the second connecting piece 7, and the first connecting portion 21 on the surface in contact with the first connecting portion 21 and the second connecting portion 31. ) and the chamfered portion 7c that does not come into contact with the second connecting portion 31, the first resistance protrusion 6d of the first connecting piece 6 and the second connecting piece 7 have a chamfered portion 7c. When the resistance protrusion 7b contacts, when the first connection piece 6 and the second connection piece 7 come into close contact, they are rubbed and frictional force is generated so that they can be temporarily fixed, so workability is good. In addition, since there is a range in which the first connecting portion 21 and the second connecting portion 31 can be freely rotated without interfering with each other, and frictional resistance is generated up to that point, after attaching the first connecting piece 6, The position of the second linking piece 7 can be temporarily fixed at an easy-to-work position until the second linking piece 7 is engaged, and workability is good.

(5) In the connecting member 5 described in any one of (1) to (4), T- or L-shaped attaching and detaching fixing portions 68A and 68B are formed on the outer periphery of the first connecting piece 6. Since it is characterized in that it is, it is possible to pick up the detachable and detachable fixing parts 68A and 68B, and also, by engaging the jig 8 with the detachable and detachable fixing parts 68A and 68B to press or pull, the connecting member ( 5) is easy to attach or remove, so workability is good.

(6) In the connection member 5 described in any one of (1) to (5), since the rotation action portion 74 is formed on the outer periphery of the second connection piece 7, the rotation action portion By applying a load to (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, the second connecting piece 7 is rotated and the workability is good. .

(7) In the connecting member 5 described in any one of (1) to (6), the position facing the outer periphery of the first connecting portion 21 of the first connecting piece 6, and the first connecting piece 6 characterized in that convex protrusions 91, 92, 93, 94 are formed at positions facing the outer periphery of the second connecting portion 31, respectively, and (8) of the second connecting piece 7 Characterized in that convex projections 95 are formed at positions facing the outer periphery of the first connecting portion 21 and at positions facing the outer circumferential portion of the second connecting portion 31 of the second connecting piece 7, respectively. do.

According to the structure of (7) or (8), the following effects are exhibited. That is, as shown in FIG. 16, the distal end 64aa of the first engagement portion 64 of the first connection piece 6 and the distal end portion of the first engagement accommodating portion 75 of the second connection piece 7 75aa normally abut and engage each other. 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 distal end portion 64aa and the distal end portion 75aa, making them unable to engage. This state does not affect the sealing force, but there is a possibility that the user feels that the attachment is not completed when viewed. Position facing the connection-side tapered surface 26, which is the outer periphery of the flange portion 25 of the first connection piece 6, and the connection-side tapered surface 36, which is the outer periphery of the flange portion 35 of the first connection piece 6 It is characterized in that a pair of convex protrusions 91, 92, 93, 94 are formed at positions opposite to the connection side taper, which is the outer periphery of the flange portion 25 of the second connecting piece 7. A pair of convex projections 95 are formed at a position facing the surface 26 and at a position facing the connection-side tapered surface 26, which is the outer periphery of the flange portion 35 of the second connecting piece 7, Since it is characterized in that there is, the first connecting piece 6 and the second connecting piece 7 are convex-shaped protrusions 91, 92, 93, 94, 95 and the connection-side tapered surfaces 26, 36 are deformed from each other, and the diameter Since they are pressed outward in the direction, the gap between the distal end portion 64aa and the distal end portion 75aa disappears, enabling reliable engagement.

(9) In the connecting member 5 described in any one of (1) to (8), the other end in the circumferential direction of the first connecting piece 6 is provided with a first locking portion 64, The other end in the circumferential direction of the two connecting pieces 7 is provided with a first engaging receiving portion 75 into which the first engaging portion 64 is engaged, and the connecting member 5 is the first engaging portion ( 64) and the first locking receiving portion 75 are positioned at the first locking position where they engage, and the connecting member 5 is closer in the direction of the annular seal member than when it is at the first locking position. Characterized in that there are two locking positions, and (10) characterized in that the first locking position is in a normal use state and the second locking position is in a fastening force increasing state, so that the first connecting portion (21) ) and the second connection part 31, when an abnormally high-temperature chemical liquid and an abnormally low-temperature pure water are alternately applied for a long period of time, etc., the sealing force is lowered and leakage occurs, etc. Therefore, by setting the second locking position closer in the direction of the annular seal member, the bonding force between the first connecting portion 21 and the second connecting portion 31 is increased, and it is possible to take urgent measures when leakage occurs. do.

(11) In the fluid device connecting jig 8 used for the connecting member 5 described in any one of (1) to (10), the first connecting piece 6 has a second jig hooking portion 66c on the outer circumferential surface. is formed, the second connection piece 7 has a first jig engaging portion 77 formed on the outer circumferential surface, and the fluid device connection jig 8 is a common engaging portion engaged with the first jig engaging portion 77. (82a), a first engagement position engagement portion 84a and a second engagement position engagement portion 84b engaging with the second jig engagement portion 66c, so that the fluid equipment connecting jig By using (8), the 1st connection piece 6 and the 2nd connection piece 7 can be made into both connection states of a 1st engagement position and a 2nd engagement position.

(12) In the fluid device connecting jig 8 used for the connecting member 5 described in any one of (1) to (10), the fluid device connecting jig 8 connects the connecting member 5 to the first connecting portion. Since it is characterized in that the first connection piece 6 and the second connection piece 7 are engaged by being inserted from the same direction as the direction of attachment to the (21) and the second connection part 31, it is possible to work from only one direction, , It is easy to work even in a narrow space where a large number of fluid devices are installed in parallel, and the workability is good.

(13) In the fluid device connection jig 8 used for the connecting member 5 described in any one of (1) to (10), the state in which the fluid device connecting jig 8 is attached to the connecting member 5 Since it is characterized in that the fastening force increasing state is indicated by this, the fastening force increasing state can be easily confirmed from the outside by the fluid device connection jig being installed on the connecting member, so that the fastening force increasing state can be easily confirmed during maintenance. Workability is good because fluid equipment can be found and responded to.

In addition, this embodiment is only a mere illustration and does not limit this invention at all. Therefore, various improvements and modifications of the present invention are possible within a range that does not deviate from the gist of the invention.

For example, a T-shaped attachment/detachment fixing portion 68 is formed on the outer periphery of the first coupling piece 6 of the present embodiment, but the shape of the attachment/detachment attachment portion 68 is It just needs to be caught, and an L-shape or only one location may be sufficient.

For example, it is an inner circumferential surface of the second connecting piece 7 of the present embodiment, and a chamfer 7c is formed on the surface in contact with the first connecting portion 21 and the second connecting portion 31. It may be a relief shape that does not come into contact with the two connection portions, and may not be a chamfered shape.

For example, the material of the jig 8 may be a fluororesin such as PTF or PTFE, or a metal other than a general resin.

For example, frictional resistance is generated by the contact between the first resistance protrusion 6d and the second resistance protrusion 7b, as well as the passage provided in the first hinge portion 63 and the second hinge portion 73 ( 29, 39) may be generated by contact between surfaces perpendicular to the axial direction.

Further, in this embodiment, the convex projections 91, 92, 93, 94, 95 are the outer peripheries of the flange portions 25, 35 in the first connection piece 6 and the second connection piece 7, respectively. Although formed at a position facing the female connection side taper surfaces 26, 36, the outer peripheral surfaces 25a, 35a, which are the outer peripheral portions of the flange portions 25, 35 (the holding portion of the annular sealing member 4 in FIG. 24 ( 45) may be formed at a position opposite to both sides).

In this embodiment, the convex projections 91, 92, 93, 94, and 95 are respectively provided as a pair at the same position in the circumferential direction, but may be alternately provided.

In this embodiment, the convex projections 91, 92, 93, 94, 95 and the connection-side tapered surfaces 26, 36 are mutually deformable, but the convex projections 91, 92, 93, 94, 95 By making the hardness of ) relatively high, the amount of deformation of the convex projections 91, 92, 93, 94, and 95 may be smaller than that of the connection-side tapered surfaces 26 and 36.

1: fluid equipment connection structure
2: first fluid device
21: first connection part
3: second fluid device
31: second connection part
4: annular seal member
5: connecting member
6: First Connection
6a: opening
6d: first resistance protrusion
64: first locking unit
66a: concave portion
69: thin section
7: Second connecting flight
7b: second resistance protrusion
7c: chamfer
75: first locking receiving portion
76: protrusion
8: fluid equipment connection jig
82a: common clasp
84a: first locking position locking portion
84b: second locking position locking portion
91, 92, 93, 94, 95: a pair of convex projections

Claims (14)

A first fluid device having a first connecting portion, a second fluid device having a second connecting portion, an annular sealing member disposed between the first connecting portion and the second connecting portion, and the first connecting portion via the annular sealing member. and a connecting member used in a fluid device connecting structure having a connecting member connecting the second connecting portion,
The connecting member has a first connecting piece and a second connecting piece, and has a pivot connecting portion at one end of the first connecting piece and the second connecting piece,
The first connection part and the second connection part have circular shapes,
The first connection piece is U-shaped with an opening and engaged with the second connection piece by exceeding 180 degrees of the entire circumference of the first connection portion and the second connection portion;
A connecting member characterized in that a T-shaped or L-shaped detachable and engaging portion is formed on the outer periphery of the first connecting piece. A first fluid device having a first connecting portion, a second fluid device having a second connecting portion, an annular sealing member disposed between the first connecting portion and the second connecting portion, and the first connecting portion via the annular sealing member. and a connecting member used in a fluid device connecting structure having a connecting member connecting the second connecting portion,
The connecting member has a first connecting piece and a second connecting piece, and has a pivot connecting portion at one end of the first connecting piece and the second connecting piece,
The first connection part and the second connection part have circular shapes,
The first connection piece is U-shaped with an opening and engaged with the second connection piece by exceeding 180 degrees of the entire circumference of the first connection portion and the second connection portion;
The first connecting portion and the second connecting portion are connected to the annular sealing member by press fitting,
The connecting member according to claim 1, wherein the first connecting piece and the second connecting piece have protrusions engaged with the first connecting portion and the second connecting portion, respectively. According to claim 1 or 2,
The size of the opening is formed smaller than the diameter of each tubular portion of the first connecting portion and the second connecting portion;
The first connection piece is deformable so as to widen outward from the difference between the diameters of the respective tubular portions of the first connection portion and the second connection portion and the size of the opening.
A connecting member characterized by a. According to claim 1 or 2,
A thin-walled portion having a cutout portion is formed in the first connecting piece.
A connecting member characterized by a. According to claim 1 or 2,
A convex projection is formed at a position of the first connecting piece facing the outer circumferential portion of the first connecting piece and a position of the first connecting piece facing the outer circumferential portion of the second connecting portion, or Convex projections are formed at positions facing the outer circumference of the first connecting portion and at positions of the second connecting piece facing the outer circumferential portion of the second connecting portion, respectively;
At least one of the convex projection of the first connection piece and the convex projection of the second connection piece is pressed outward in the radial direction by the first connection part and the second connection part.
A connecting member characterized by a. According to claim 1 or 2,
A resistance generating portion for preventing self-weight rotation is formed in the rotation connection portion of the first connection piece and the second connection piece.
A connecting member characterized by a. According to claim 1 or 2,
A rotation action portion is formed on the outer circumference of the second connecting piece;
By pressing the rotation action part from the same direction as the direction in which the first connection piece is attached to the first connection part and the second connection part, the second connection piece can be rotated so that the first connection piece and the second connection piece come closer. thing,
A connecting member characterized by a. According to claim 1 or 2,
The other end of the first connection piece has a first locking portion, the other end of the second connection piece has a first locking accommodating portion into which the first locking piece is hooked, and the connecting member comprises: being positioned at a first catching position where the first catching part and the first catching receiving part are engaged;
The connecting member has a second engagement position closer in the direction of the annular seal member than when it is at the first engagement position.
The first locking position is a normal use state,
The second locking position is in a fastening force increasing state,
Applying a force to the second connecting piece in a direction opposite to a direction in which the first connecting piece is attached to the first connecting portion and the second connecting portion, thereby bringing the fastening force to the increased state.
A connecting member characterized by a. In the fluid equipment connection jig used for the connecting member according to claim 1 or 2,
Indicating a fastening force increase state by the state in which the fluid device connection jig is installed on the coupling member
A fluid device connection jig characterized in that. In the fluid equipment connection jig used for the connecting member according to claim 1 or 2,
The first connecting piece has a second jig engaging portion formed on an outer circumferential surface, and the second connecting piece has a first jig engaging portion formed on an outer circumferential surface;
The fluid device connection jig is provided with a common engaging portion engaged with the first jig engaging portion, a first engaging position engaging portion engaging with the second jig engaging portion, and a second engaging position engaging portion. ,
The first locking position locking portion and the second locking position locking portion are formed at both ends of a rotating member rotatably held by the fluid equipment connecting jig.
A fluid device connection jig characterized in that. In the fluid equipment connection jig used for the connecting member according to claim 1 or 2,
The fluid device connection jig engages the first connection piece and the second connection piece by being inserted from the same direction as the direction in which the connection member is inserted into the first connection portion and the second connection portion.
A fluid device connection jig characterized in that. A fluid device connection structure comprising the connecting member according to claim 1 or 2. delete delete

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