JP2008240916A - Sealing structure of connecting parts - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing structure of connecting parts suitable for detaching/attaching of a seal member. <P>SOLUTION: In the sealing structure 1 of the connecting parts, the seal member 4 is interposed between the connecting parts 12, 22 of a first component 2 and a second component 3, a first uneven strip 15 is formed on the connecting part 12 of the first component 2, and a second uneven strip 25 is formed on the connecting part 22 of the second component 3. In the seal member 4, a first fitting part 32 fitted with the first uneven strip 15 is provided over one surface, and a second fitting part 33 fitted with the second uneven strip 25 is provided over the other surface. The first and second fitting parts 32, 33 are provided with a press-fit margin 34 in the thickness direction. The seal member 4 includes an overhung part 35 overhanging in the outer peripheral direction from an annular seal main body part 31 provided with the first and second fitting parts 32, 33. The overhung part 35 projects further outward than the connecting parts 12, 22 of the first and second components 2, 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a connection part seal structure in which a seal member is interposed in a connection part between a first part and a second part.

As a connection part seal structure in which a seal member is interposed in a connection part between the first part and the second part, for example, there is one described in Patent Document 1. FIG. 25 is a cross-sectional view of an integrated panel 100 to which a conventional connection portion seal structure is applied.
In the integrated panel 100, a valve 102 is fixed to the upper surface of the panel material 101 with bolts 116, and a seal member 112 is interposed between the panel material 101 and the valve 102.

  The panel material 101 is made of a fluororesin. In the connection portion 101 a of the panel material 101, a vertical passage 104 that communicates with the first port 103 and a vertical ring passage 106 that communicates with the second port 105 and is formed in a ring shape around the vertical passage 104 are opened. ing. The connecting portion 101 a is provided with an uneven strip having an annular protrusion 107 outside the passages 104 and 106. On the other hand, the valve 102 includes a flow path block 108 made of fluororesin. A supply side passage 109 corresponding to the longitudinal passage 104 of the panel material 101 and an annular discharge side passage 110 corresponding to the longitudinal ring passage 106 of the panel material 101 are opened in the connection portion 108 a of the flow path block 108. . The connecting portion 108 a is provided with an uneven strip having an annular protrusion 111 outside the passages 109 and 110.

  The seal member 112 is formed by annularly forming a fluororesin, and annular grooves 113 and 114 into which the annular protrusions 107 and 111 are fitted are formed on both end surfaces. The groove widths of the annular grooves 113 and 114 are set to 0.75 to 0.85 times the groove width of the annular protrusions, and the outer peripheral surface and the inner peripheral surface of the annular protrusions 107 and 111 correspond to the annular grooves 113 and 114. It is pressed against the inner and outer peripheral surfaces. A ring-shaped attachment / detachment flange 115 projects laterally from the outer peripheral wall of the seal member 112. The thickness of the detachable flange 115 is set to a value smaller than the gap W between the connecting portions 101a and 108a.

  When the seal member 112 is mounted, after the seal member 112 is installed on the panel material 101 so that the annular protrusion 107 of the panel material 101 is inserted into the annular groove 113 of the seal member 112, the annular protrusion 111 of the flow path block 108 is sealed. The valve 102 is installed on the panel material 101 so as to be inserted into the annular groove 114 of the member 112, and then the bolts 116 are tightened to fit the annular protrusions 107 and 111 into the annular grooves 113 and 114 of the seal member 112. .

  On the other hand, when removing the seal member 112, the bolt 116 is removed and the valve 102 is separated from the panel material 101, so that the seal member 112 adheres to either the panel material 101 or the flow path block 108. Therefore, the attachment / detachment flange 115 of the seal member 112 is pulled with a tool or a finger to remove the seal member 112 from the concavo-convex strip of the panel material 101 or the flow path block 108.

JP 2006-90378 A (see page 11, paragraph 0041)

  However, in the conventional connection portion seal structure, the attachment / detachment flange 115 of the seal member 112 is small and fit between the connection portions 101a and 108a, so that it is difficult to grasp with fingers. For this reason, in the conventional connection portion seal structure, the attachment / detachment flange 115 must be pinched with a tool and pulled, but the tool may rub against or collide with the connection portions 101a and 108a during the operation. There was a possibility of scratching. When the connection portions 101a and 108a are damaged, the panel material 101 and the flow path block 108 must be completely replaced in order to prevent fluid leakage from the damaged portions. It takes time to remove 112.

  Even if the detachable flange 115 can be grasped with fingers, the thickness of the detachable flange 115 is such that when the flow path block 108 is attached to the panel material 101 with the bolt 116, the detachable flange 115 is connected to the connecting portion 101a of the panel material 101 or the flow path. In order to prevent contact with the connecting portion 108a of the block 108 and pinching with fingers, the value is made smaller than the gap W between the connecting portions 101a and 108a, and the thickness is reduced. Therefore, when the detachable flange 115 is pinched with fingers and pulled, the detachable flange 115 may be broken and damaged, which is not practical.

  Therefore, there has been a demand for a connection seal structure that can easily remove the seal member interposed between the first component and the second component manually.

  Further, in the conventional connection portion seal structure, the groove width of the annular grooves 113 and 114 formed in the seal member 112 is smaller than the width of the annular protrusions 107 and 111 including the opening. Therefore, the positional relationship between the first and second parts and the seal member is unstable until the tips of the annular protrusions 107 and 111 are pushed into the annular grooves 113 and 114, and the annular protrusions 107 and 111 are inserted into the annular grooves 113 and 114. It was hard to press fit. Therefore, there has been a demand for a connection portion seal structure that facilitates press-fitting of the annular protrusion into the annular groove and has good attachment of the seal member.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a connection seal structure suitable for removing / attaching a seal member.

The connection part seal structure according to the present invention has the following configuration.
(1) A seal member is interposed in a connection portion between the first component and the second component, the first component is formed with a first ridge on the connection portion, and the second component is connected to the connection portion. 2 concavo-convex ridges are formed, and the sealing member is provided on one side with a first fitting portion that fits on the first concavo-convex ridge, and the second fitting portion that fits on the second concavo-convex ridge on the other side. In the connecting portion seal structure provided with the press-fitting margin in the thickness direction at the first and second fitting portions, the seal member is formed from an annular seal main body portion provided with the first and second fitting portions. An overhanging portion that protrudes in the outer circumferential direction is provided, and the overhanging portion protrudes outside the connecting portion of the first and second parts.

(2) In the invention described in (1), the seal member has a grip portion extending in a direction orthogonal to the overhang portion at an end portion of the overhang portion.

(3) In the invention described in (1) or (2), the seal member is provided so that positioning protrusions extend on both end faces of the overhanging portion in parallel with the axis of the seal main body. The first part is provided with a first positioning hole for positioning by positioning the positioning convex part, and the second part is provided with a second positioning hole for positioning by positioning the positioning convex part. Yes.

(4) A seal member is interposed at a connection portion between the first component and the second component, a first annular protrusion is formed at the connection portion of the first component, and a first annular protrusion is formed at the connection portion of the second component. Two annular protrusions are formed, and the sealing member is provided with a first annular groove on one surface in which the first annular protrusion is fitted, and a second annular groove in which the second annular protrusion is fitted on the other surface. The first and second annular grooves are provided with press-fitting allowances in the thickness direction, and the first and second annular protrusions are sealed by press-fitting into the press-fitting allowances of the first and second annular grooves. In the connection portion sealing structure, a guide portion that guides the first and second annular protrusions from the openings of the first and second annular grooves to the press-fitting allowance is provided on the first and second annular grooves of the seal member. It is provided in the opening.

(5) A seal member is interposed in a connection portion between the first component and the second component, a first annular groove is formed in the connection portion of the first component, and a first annular groove is formed in the connection portion of the second component. Two annular grooves are formed, and the seal member is provided with a first annular protrusion fitted to the first annular groove on one surface, and a second annular protrusion fitted to the second annular groove on the other surface. The first and second annular protrusions are provided with a press-fitting allowance in the thickness direction, and the first and second annular protrusions are press-fitted into the first and second annular grooves. In the connecting portion seal structure for sealing the first and second annular protrusions by fitting them into the first and second annular grooves, the press-fitting allowance of the first and second annular protrusions to the first and second annular grooves. A guide portion for guiding is provided at the tip portions of the first and second annular protrusions of the seal member.

  In the connection part seal structure having the above-described configuration, when the first part and the second part are separated, the seal member remaining accompanying the first part or the second part has the first protruding part. It protrudes outside from the connection part of the part or the second part. Even if the overhanging part is sandwiched between the first part and the second part and sticks to the connection part of the first part or the second part, the overhanging part is pinched to connect the overhanging part to the first part or the second part. It peels off from the connection part of a 2nd component, pinches an overhang | projection part with fingers, and it is easy to remove a sealing member by pulling from a 1st component or a 2nd component. Therefore, according to the connection part seal structure of the present invention, the seal member interposed in the connection part of the first part or the second part can be easily removed manually.

In the connection part seal structure of the present invention, the gripping part is provided at the end of the overhanging part that protrudes outside the connection part of the first and second parts, and the gripping area is widened. When removing the member from the first or second part, the fingers are difficult to slip from the grip portion.
In this case, when the grip portion inner diameter is provided so as to follow the connection portion shape of the first and second parts, the grip portion inner diameter covers the connection portions of the first and second components. It is easy to mount on the first part or the second part.

  In the connection part seal structure of the present invention, the positioning protrusions of the sealing member are fitted into the first and second positioning holes of the first and second parts, and the sealing member is attached to the first part and the second part. Therefore, the seal member can be easily mounted.

In the connection portion seal structure according to the present invention, the first and second annular projections are provided in the openings of the first and second annular grooves so that the first and second annular projections are guided to the press-fit allowance. It is easy to press-fit into the press-fitting allowance of the first and second fitting portions, and the mounting property of the seal member is good.
In the connecting portion seal structure according to the present invention, since the guide portion for guiding the press-fitting allowance to the first and second annular grooves is provided at the tip portions of the first and second annular projections, the first and second annular projections are provided. Can be easily press-fitted into the first and second annular grooves, and the attachment of the seal member is good.

Next, an embodiment of a connection portion seal structure and a seal member according to the present invention will be described with reference to the drawings.
The connection portion seal structure 1 according to the present embodiment includes a connection portion between the flow path block and the manifold block of the fluid device for the chemical valve, in addition to the connection portion between the panel material 101 and the flow passage block 108 of the integrated panel 100 shown in FIG. It is also applied to connections between piping blocks. These members can be examples of the first component 2 and the second component 3 described later.

<Overall configuration>
FIG. 1 is an enlarged cross-sectional view showing a connection seal structure 1 according to an embodiment of the present invention.
The connection portion seal structure 1 of the present embodiment is configured by interposing a seal member 4 between a first component 2 and a second component 3. In the connection portion seal structure 1, a pair of connecting members 5 connects the connection portion 12 of the first component 2 and the connection portion 22 of the second component 3 so as to cover the periphery of the seal member 4.

<Configuration of first part>
FIG. 2 is an exploded view of the connection portion seal structure 1 shown in FIG. However, the connecting member 5 is omitted.
The first component 2 is made of a fluororesin such as PTFE or PFA. In the first component 2, the first flow path 11 is open to the connection portion 12. The connection portion 12 is formed on the end surface of the first flange portion 13 provided in the first component 2. The first flange portion 13 is provided smaller than the outer dimension of the second component 3 in order to mount the connecting member 5. The connection portion 12 is formed with a first concavo-convex line 15 having a first annular protrusion 14 in an annular shape along the outside of the opening where the first flow path 11 opens. The width W1 in the thickness direction of the first annular protrusion 14 is set to be the same as or slightly smaller than the width W3 of the first and second annular grooves 32 and 33 of the seal member 4. A first positioning hole 16 is formed outside the first uneven strip 15 in the connecting portion 12.

<Configuration of second part>
The second component 3 is made of a fluororesin such as PTFE or PFA. In the second component 3, the second flow path 21 is open to the connection portion 22. The connection portion 22 is formed on the end surface of the second flange portion 23 provided in the second component 3. The second flange portion 23 is provided smaller than the outer dimension of the second component 3 in order to mount the connecting member 5. The connection portion 22 is formed with a second concavo-convex line 25 having a second annular protrusion 24 in an annular shape along the outside of the opening where the second flow path 21 opens. The width W1 of the second annular protrusion 24 in the thickness direction is set to be the same as or slightly smaller than the width W3 of the first and second annular grooves 32 and 33 of the seal member 4. The connection portion 22 has a second positioning hole portion 26 formed outside the second concavo-convex strip 25.

  The first and second parts 2 and 3 include the first and second flange portions 13 and 23, the first and second annular protrusions 14 and 24, the first and second concave and convex strips 15 and 25, and the first. And the 2nd positioning hole parts 16 and 26 are provided in the symmetrical shape.

<Configuration of seal member>
FIG. 3 is a plan view of the seal member 4. 4 is a cross-sectional view taken along line AA in FIG.
The seal member 4 is made of a fluororesin such as PTFE or PFA. Since the sealing member 4 does not restrict the mounting direction with respect to the first component 2 and the second component 3, both end surfaces (left and right end surfaces in the figure) are symmetrical.

  The seal member 4 includes an annular seal body portion 31. The seal body 31 has a first annular groove 32 that fits into the first annular protrusion 14 of the first part 2 formed on one surface, and a second annular part that fits into the second annular protrusion 24 of the second part 3. A groove 33 is formed on the other surface.

  In the sealing member 4, the width W3 of the first and second annular grooves 32, 33 is substantially the same as the width W1 of the first and second annular protrusions 14, 24 provided in the first and second parts 2, 3. Or it is provided slightly larger. Specifically, the first and second annular grooves 32 and 33 are set so that the width W3 is 1 to 1.2 times the width W1 of the first and second annular protrusions 14 and 24. Yes. The inner circumferential wall and the outer circumferential wall of the first and second annular grooves 32 and 33 are provided with press-fitting allowances 34 having thicknesses t and t ′ on the inner side from the openings of the first and second annular grooves 32 and 33 in the thickness direction. The width W2 of the portion provided with X1 and the press-fitting allowance 34 is narrower than the width W3 of the first and second annular grooves 32 and 33 (see the dotted line portion in FIG. 4). Therefore, the seal member 4 is provided with a step between the opening portions of the first and second annular grooves 32 and 33 and the press-fitting allowance 34, and the first and second annular protrusions 14 and 24 are connected to the first by the step. And the 1st and 2nd guide parts 38 and 39 for guiding to the press fitting allowance 34 from the opening part of the 2nd annular grooves 32 and 33 are provided. Here, it is desirable that t and t ′ are ideally the same in order to make the sealing force uniform, but in reality, it is considered that a dimensional tolerance is generated, and therefore, t and t ′ are considered separately. The thickness of the press-fitting allowance 34 is t + t ′ = W1−W2 (see FIG. 2).

  The seal member 4 is provided with a pair of protruding portions 35, 35 in the outer peripheral direction from the outer peripheral wall of the seal main body portion 31. The overhang portions 35, 35 are provided in opposite directions with the seal body portion 31 in between, and are arranged symmetrically. Each overhang portion 35 is formed in a rectangular film shape so as to be freely bent. The thickness of each overhang portion 35 ensures a strength that does not cause damage when the seal member 4 into which the first or second annular protrusions 14 and 24 of the press-fitting allowance 34 are press-fitted is pulled. When the seal member 4 is mounted on the connection parts 12 and 22 of the first and second parts 2 and 3, each overhang part 35 has an end part than the connection parts 12 and 22 of the first and second parts. It is provided to go outside.

  A grip portion 36 is provided at the end of each overhang portion 35. The grip portion 36 is made thicker than the overhang portion 35 in order to ensure strength when pinched with fingers. The grip portion 36 is provided such that the axial total length X2 is larger than the axial total length X3 of the seal body 31. The grip portion 36 protrudes in the axial direction from the end surface of the seal member 4, and the seal member 4 When handling, the grip part 36 comes into contact with another object prior to the seal body part 31 to protect the seal body part 31 and its seal surface. The inner diameter of the grip portion 36 is the same as the outer diameter of the first and second flange portions 13 and 23, and the grip portion 36 is gripped when the seal member 4 is mounted on the first and second flange portions 13 and 23. Since the inner peripheral surface of the portion 36 covers the outer peripheral surfaces of the first and second flange portions 13 and 23, the seal member 4 is mounted on the connection portions 12 and 22 of the first and second components 2 and 3. It's easy to do.

  One overhang portion 35 is provided with positioning convex portions 37 and 37 in a pin shape. The pair of positioning convex portions 37 are provided on both end surfaces of the overhang portion 35 so as to extend in parallel with the axial direction of the seal main body portion 31, and are arranged symmetrically with the overhang portion 35 interposed therebetween. The pair of positioning projections 37 is provided at a height that protrudes in the axial direction from the seal body 31 and is fitted into the first and second positioning holes 16 and 26 of the first and second parts to be sealed. Is positioned relative to the first and second parts 2, 3.

<Configuration of connecting member>
Returning to FIG. 1, the pair of connecting members 5 are attached to the first and second parts 2 and 3 so as to sandwich the first and second flange portions 13 and 23 with the seal member 4 interposed therebetween from both sides. The connecting portions 12 and 22 are connected so as to surround the first and second flange portions 12 and 23. The pair of connecting members 5 cover so as to hold down the grip portion 36 that protrudes outward from between the first and second flange portions 13 and 23.

<Installation explanation of seal member>
FIG. 5 is a mounting explanatory view for attaching the seal member 4 in the connection portion seal structure 1 shown in FIG. 1 and shows a state before connection. FIG. 6 is a mounting explanatory view for attaching the seal member 4 in the connection portion seal structure 1 shown in FIG. 1 and shows a state after connection.
As shown in FIG. 5, after the positioning convex portion 37 of the seal member 4 is inserted into the first positioning hole portion 16 of the first component 2, the first annular protrusion 14 of the first component 2 is inserted into the seal member 4. Insert into the first guide portion 38. Further, after the positioning convex portion 37 of the seal member 4 is inserted into the second positioning hole portion 26 of the second component 3, the second annular protrusion 24 of the second component 3 is inserted into the second guide portion 39 of the seal member 4. Insert into. Thereby, the connection part 12 of the 1st component 2 and the connection part 22 of the 2nd component 3 rotate the seal member 4 via the positioning convex part 37 inserted in the 1st and 2nd positioning hole parts 16 and 26. The first and second flow paths 11 and 21 are coaxially arranged by being positioned via the seal body 31 of the seal member 4.

  When the second part 3 is connected to the first part 2 side in this state, the first and second parts 2 and 3 are guided by the positioning projections 37 of the seal member 4 and move on the same axis. The parts 12 and 22 are brought close to each other. Accordingly, the first and second annular protrusions 14, 24 of the first and second parts 2, 3 extend from the first and second guide portions 38, 39 of the seal member 4 to the first and second annular grooves 32. , 33 is press-fitted into a press-fitting allowance 34. When the first and second annular protrusions 14 and 24 are sufficiently pushed into the press-fitting allowance 34 of the seal member 4, the connecting portions 12 and 22 of the first and second parts 2 and 3 connect the protruding portion 35 of the seal member 4. Sandwich. At this time, the grip portion 36 provided at the end of the overhang portion 35 protrudes outside the connection portions 12 and 22 of the first and second members 2 and 3, and the first and second flange portions 13. , 23 on the outer peripheral surface.

  Then, as shown in FIG. 1, the pair of connecting members 5 and 5 are attached so as to cover the first and second flange portions 13 and 23 so that the grip portions 36 and 36 of the seal member 4 are not exposed to the outside. To do.

<Removal explanation of seal member>
FIG. 7 is a process diagram showing a process of removing the seal member 4 in the connection portion seal structure shown in FIG. 1, and shows a state where the second component is removed from the seal member.
When the pair of connecting members 5 and 5 shown in FIG. 1 are removed from the first and second flange portions 13 and 23 and the state shown in FIG. 6 is reached, as shown in FIG. The part 3 is separated. Then, the seal member 4 remains attached to either the first part 2 or the second part 3. In the present embodiment, it is assumed that the second component 3 remains.

  By separating the seal member 4 from the first component 2, one end side of the seal main body portion 31, the grip portion 36, and the positioning convex portion 37 is opened. For example, when the thumb 36 is tilted with respect to the overhanging portion 35 by applying an inward (seal main body 31 side) force to one end side of the gripping portion 36 with the thumb, the other end side of the gripping portion 36 becomes the second flange. Since it floats up from the outer peripheral surface of the part 23, an index finger is hooked on the other end side of the lifted grip part 36, and the grip part 36 is firmly pinched with the thumb and the index finger and pulled. Since the gripping portion 36 is set to have a larger overall length X2 than the seal main body portion X3, if the one end side of the gripping portion 36 is pressed, the other end of the gripping portion 36 is lifted up and the gripping portion 36 is easily pinched. Further, since the grip portion 36 has a large grip area, it is difficult for the fingers to slip from the grip portion 36 when the seal member 4 is pulled.

  Here, when the sealing member 4 is provided with two rectangular protruding portions 35 on the outer peripheral wall of the sealing member 4 and the sealing member 4 is interposed between the connecting portions 12 and 22, the protruding portion 35 is connected to the connecting portion. There is little area to stick to 12 and 22. For this reason, even if the thickness is ensured so that the overhanging portion 35 is tightly sandwiched between the connecting portions 12 and 22, the overhanging portion 35 is pulled when the gripping portion 36 is pulled away from the second component 3. 35 is easily peeled off from the connecting portion 22.

  The seal member 4 is pulled with a substantially uniform force on the grip portions 36 of the pair of overhang portions 35 provided on a straight line with the seal body portion 31 interposed therebetween. Therefore, the tensile force is dispersed in the seal member 4, and the overhang portion 35 is difficult to tear when the grip portion 36 is pulled. As shown in FIG. 8, the seal member 4 pulled by the grip portion 36 releases the fitting state between the second annular groove 33 and the second annular protrusion 24, and the second uneven groove 25 of the second component 3 is removed. Removed.

  Thus, the seal member 4 can be removed from the connecting portions 12 and 22 of the first and second parts 2 and 3 manually without using a tool. Therefore, when the sealing member 4 is removed, the connection parts 12 and 22 of the first and second parts 2 and 3 are not damaged. Further, the sealing member 4 itself is not damaged by the tool. Further, since the overhanging portion 35 has strength, the seal member 4 is pulled out by pinching the overhanging portions 35 and 35 with fingers and removed from the connecting portions 12 and 22 of the first or second parts 2 and 3. However, it is difficult to cause damage such as tearing and tearing of the overhang portion 35. Thus, in the connection part seal structure 1 of 1st Embodiment, when removing the sealing member 4, the sealing member 4 and the 1st and 2nd components 2 and 3 are hard to be damaged, and the sealing member 4 is made into 1st and 2nd. It can be used by repeatedly attaching to and detaching from the second parts 2 and 3.

<Attaching the seal member>
When the seal member 4 is mounted between the first and second parts 2 and 3, the procedure may be reversed from the above-described removal procedure.

  In this case, the seal member 4 is configured such that the gripping portions 36 and 36 provided at the end portion of the overhanging portion 35 are pinched with fingers, and the first or second annular grooves 32 and 33 are formed in the first part 2 of the first component 2. Alignment with the annular projection 14 or the second annular projection 24 of the second part 3, the guide portions 38, 39 of the first or second annular groove 32, 33, the tip of the first or second annular projection 14, 24 Is inserted into the connecting portions 12 and 22 of the first or second component 2 or 3.

  Moreover, the grip portions 26 and 26 protrude in the axial direction from the end surface of the seal main body portion 31. Therefore, the outer circumferences of the first and second flange portions 13 and 23 are inserted before the tip portions of the first or second annular projections 14 and 24 are inserted into the guide portions 38 and 39 of the first or second annular grooves 32 and 33. Mounted on the surface, the guide portions 38 and 39 of the first or second annular grooves 32 and 33 and the tip portions of the first or second annular projections 14 and 24 are positioned. The grip portion 36 is formed along the first or second flange portions 13 and 23 with the guide portions 38 and 39 of the first or second annular grooves 32 and 33 on the first or second annular projections 14 and 24. Since the tip portion is guided and functions as a guide, the seal member 4 can be easily attached to the connection portions 12 and 22 of the first or second component 2 or 3.

<Effect>
In the connection part seal structure 1 of the said embodiment, when the 1st component 2 and the 2nd component 3 are isolate | separated, the sealing member 4 which remained accompanying the 1st component 2 or the 2nd component 3 is the following. The overhanging portion 35 protrudes outward from the connection portions 12 and 22 of the first component 2 or the second component 3 (see FIG. 7).
When the first part 2 and the second part 3 are separated, the connecting part of the first part 2 is thick enough that the overhanging part 35 is sandwiched between the first part 2 and the second part 3. 12 or the connection part 22 of the second part 3, the extension part 35 is pinched to connect the extension part 35 from the connection part 12 of the first part 2 or the connection part 22 of the second part 3. It is easy to remove the seal member 4 by pulling it off from the first part 2 or the second part 3 by firmly pinching the overhang part 35 with fingers. Moreover, since the overhang | projection part 35 has intensity | strength, it cannot tear in the middle of the overhang | projection part 35 being pulled. Therefore, according to the connection portion seal structure 1 of the present embodiment, the seal member 4 interposed in the connection portions 12 and 22 of the first component 2 or the second component 3 can be easily removed. And according to the connection part seal structure 1 of 1st Embodiment, the edge part of the overhang | projection part 35 of the sealing member 4 is pinched with fingers, and the seal body part 31 is the connection part of the 1st or 2nd components 2 and 3. For example, even when the seal member 4 is small and difficult to handle, the seal member 4 can be easily attached to the connecting portions 12 and 22.

  In the connection part seal structure 1 of the above-described embodiment, the grip part 36 is provided at the end of the overhang part 35 protruding outside the connection parts 12 and 22 of the first and second parts 2 and 3, and the grip area is increased. Since it is widened (see FIG. 7), when the grip portion 36 is pulled to remove the seal member 4 from the first or second component 2, 3, it is difficult for the fingers to slip from the grip portion 36.

  In the connection portion seal structure 1 of the above embodiment, the positioning convex portions 37 and 37 of the seal member 4 are fitted into the first and second positioning hole portions 16 and 26 of the first and second parts, and the seal member 4 is inserted. Since it positions with respect to the 1st component 2 and the 2nd component 3 (refer FIG. 5), the sealing member 4 can be mounted | worn easily.

  In the connection portion seal structure 1 of the above embodiment, the first and second annular protrusions 14 and 24 provided on the first and second uneven grooves 15 and 25 at the openings of the first and second annular grooves 32 and 33, respectively. Since the guide portions 38 and 39 are provided to guide the press-fitting allowance 34 (see FIG. 5), the first and second annular protrusions 14 and 24 are press-fitted into the press-fit allowance 34 of the first and second annular grooves 32 and 33. It is easy and the attachment property of the seal member 4 is good.

<Modification>
In addition, this invention is not limited to the said embodiment, Various application is possible.

(1) For example, the following modification can be considered about the sealing member 4 of the said embodiment. For example, it is good also as the overhang | projection part 35A which abbreviate | omitted the positioning convex part 37 like the sealing member 4A shown in FIG.9 and FIG.10. In this case, the positioning holes 16 and 26 may not be formed in the first and second parts 2 and 3.

  Further, like the seal member 4B shown in FIGS. 11 and 12, the gripping portion 36 of the overhanging portion 35A shown in FIGS. 9 and 10 is omitted to form the gripping portion 35B, and a material used for manufacturing the seal member 4B. May be reduced. Even in this case, if the overhanging portion 35A protrudes outside the connecting portions 12 and 22 when the seal member 4B is attached to the first and second parts 2 and 3, the protruding portion is fingered. The seal member 4B can be easily removed from the first and second parts 2 and 3 by pinching.

  Further, the seal member 4 of the above embodiment is provided with a pair of projecting portions 35, 35 at symmetrical positions with the seal body portion 31 in between. However, like the seal member 4C shown in FIGS. The overhanging portion 35 </ b> C may be provided only on one side of the portion 31. In this case, the overhanging portion 35C may be formed in a substantially triangular shape and tapered so that the force pulling the overhanging portion 35C is widely dispersed in the connecting portion between the seal main body portion 31 and the overhanging portion 35C. And you may provide the holding part 36 in a front-end | tip part. On the other hand, like the seal member 4D shown in FIGS. 15 and 16, the gripping portion 36 of the overhang portion 35C shown in FIGS. 13 and 14 may be omitted to form the overhang portion 35D.

  Further, as in the seal member 4E shown in FIGS. 17 and 18, overhang portions 35E may be provided on the outer peripheral wall of the seal main body portion 31 at equal intervals in the circumferential direction (here, the overhang portion 35E is sealed). It is arranged in a cross around the main body 31). And it is good to provide the holding part 36 in the edge part of each overhang | projection part 35E. Thus, by providing many overhang | projection parts 35E, the restriction | limiting of the direction which pinches the holding | grip part 36 decreases, and the removal | desorption operation | work to the sealing member 4E can be performed easily. On the other hand, like the seal member 4F shown in FIGS. 19 and 20, the gripping portion 36 of the overhang portion 35E shown in FIGS. 17 and 18 may be omitted to form the overhang portion 35F.

  Further, as shown in the seal member 4G shown in FIGS. 21 and 22, the protruding portion 35G may be provided in an annular shape along the outer peripheral wall of the seal main body portion 31. And it is good to provide the holding part 36 in the edge part (outer edge part) of 35 G of overhang | projection parts. Thereby, the mounting direction of the seal member 4G is not limited, and the strength of the overhanging portion 35G can be secured to prevent damage when the seal member 4G is attached or detached.

  However, if the projecting portion 35G is formed in an annular shape and is in contact with the connecting portions 12 and 22 over the entire surface, the projecting portion 35G may seal to the connecting portions 12 and 22 and the sealability of the press-fit portion to be originally sealed cannot be confirmed. There is. Therefore, when the groove 40 extending from the seal main body 31 to the outer edge portion is formed on the surface of the overhanging portion 35G, and the seal member 4G is interposed in the connection portions 12 and 22 of the first and second parts 2 and 3 In addition, the overhanging portion 35G may be prevented from being in close contact with the connecting portions 12 and 22 and sealed. In this modification, four grooves 40 are formed, but it goes without saying that the number of grooves 40 is not limited to this.

(2) In the said embodiment, the connection member 5 with which the 1st and 2nd flange parts 13 and 23 are mounted | worn was made into U-shaped cross-section. On the other hand, even if the connection part of the 1st and 2nd components 2 and 3 is formed in the end surface of 1st and 2nd flange part 13A, 23A like the connection part seal structure 1A shown in FIG. Good. The first and second flange portions 13A and 23A are formed with concave and convex grooves 41 and 42 on the outer peripheral surface, and the convex and concave portions 43 and 44 engaged with the concave and convex grooves 41 and 42 are connected to the inner peripheral surface of the connecting members 5A and 5A. You may form in. Then, the concave and convex grooves 41 and 42 are arranged so that the force generated when the concave and convex grooves 43 and 44 are pushed into and fitted into the concave and convex grooves 41 and 42 acts on the sealing surfaces of the first and second flange portions 13A and 23A. It is preferable to provide an inclination on the sliding contact surface between the inner wall 42 and the convex recess 42. Thereby, the seal body 31 of the seal member 4G can be easily crushed with a uniform force in the circumferential direction, and the sealing performance can be improved.

(3) In the above embodiment, the positioning convex portion 37 is formed in a pin shape, but it may be formed in a plate shape or the like.

(4) In the above embodiment, the first and second annular grooves 32 and 33 are formed in the seal member 4, and the first and second annular protrusions 14 and 24 are provided in the first and second parts 2 and 3. . On the other hand, as shown in FIG. 24, first and second fitting portions including first and second annular protrusions 51 and 52 are provided on both end surfaces of the seal body portion 31A constituting the seal member 4H. First and second annular grooves 53, 54 that are fitted to the first and second annular protrusions 51, 52 of the seal member 4 H at the connection parts 12, 22 of the first and second parts 2, 3. Two uneven strips 55 and 56 may be formed.

  In this case, the first and second annular protrusions 51 and 52 are thickened in the thickness direction X11 by the thicknesses t and t ′ respectively on the inner peripheral surface and the outer peripheral surface on the back side from the tip portion, and the press-fitting allowance 57 is set. It may be provided. Accordingly, the first and second annular protrusions 51 and 52 have a distal end width W31 narrower than a proximal end width W11 provided with the press-fitting allowance 57, and the first and second annular protrusions 51 and 52 A step is provided between the portion and the base end portion. The first and second annular protrusions 51 and 52 have a tip end width W31 substantially the same as or slightly the same as the width W21 of the first and second annular grooves 53 and 54 formed in the first and second parts 2 and 3, respectively. It is set large. Therefore, the tip ends of the first and second annular protrusions 51 and 52 are connected to the first and second annular protrusions 51 and 52 when they are inserted into the first and second annular protrusions 51 and 52. It plays the role of the guide parts 58 and 59 guided to the grooves 53 and 54. Thus, by providing the guide portions 58 and 59 for guiding the press-fitting allowance 57 to the first and second annular grooves 53 and 54 at the tip portions of the first and second annular protrusions 51 and 52, the first and second annular protrusions 51 and 52 are provided. The two annular protrusions 51 and 52 can be easily press-fitted into the first and second annular grooves 53 and 54, and the mounting property of the seal member 4H is improved. The first and second annular protrusions 51 and 52 press-fitted into the first and second annular grooves 53 and 54 seal the press-fitting allowances 57 at the crushed portions.

  Note that the thickness of the press-fitting allowance 57 provided on the first and second annular protrusions 51 and 52 of the seal member 4H is t + t ′ = W11−W21. The crushing rate of the press-fitting allowance 57 when the first and second annular protrusions 51 and 52 are press-fitted into the first and second annular grooves 53 and 54 is 0.1 or more and 0.3 or less, as in the above embodiment. It is desirable.

It is an expanded sectional view which shows the connection part seal structure which concerns on embodiment of this invention. It is an exploded view of the connection part seal structure shown in FIG. However, the connecting member is omitted. It is a top view of the sealing member shown in FIG. It is AA sectional drawing of FIG. It is attachment explanatory drawing which attaches the sealing member in the connection part seal structure shown in FIG. 1, Comprising: The state before a connection is shown. It is attachment explanatory drawing which attaches the sealing member in the connection part seal structure shown in FIG. 1, Comprising: The state after a connection is shown. It is removal explanatory drawing which removes the sealing member in the connection part seal structure shown in FIG. 1, Comprising: The state which removed the 1st component from the sealing member is shown. It is removal explanatory drawing which removes the sealing member in the connection part seal structure shown in FIG. 1, Comprising: The state which removed the 2nd component from the sealing member is shown. It is a top view which shows the 1st modification of the sealing member shown in FIG. It is BB sectional drawing of the modification shown in FIG. It is a top view which shows the 2nd modification of the sealing member shown in FIG. It is CC sectional drawing of the modification shown in FIG. It is a top view which shows the 3rd modification of the sealing member shown in FIG. It is DD sectional drawing of the modification shown in FIG. It is a top view which shows the 4th modification of the sealing member shown in FIG. It is EE sectional drawing of the modification shown in FIG. It is a top view which shows the 5th modification of the sealing member shown in FIG. It is FF sectional drawing of the modification shown in FIG. It is a top view which shows the 6th modification of the sealing member shown in FIG. It is GG sectional drawing of the modification shown in FIG. It is a top view which shows the 7th modification of the sealing member shown in FIG. It is HH sectional drawing of the modification shown in FIG. It is a modification of the connection part seal structure shown in FIG. It is a modification of the connection part seal structure shown in FIG. It is sectional drawing of the chemical | medical solution valve to which the conventional connection part seal structure is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Connection part seal structure 2 1st part 3 2nd part 4 Seal member 5 Connection member 12 Connection part 15 1st uneven surface 16 1st positioning hole part 22 Connection part 25 2nd uneven surface 26 2nd positioning hole part 31 Seal body 32 first annular groove (first fitting portion)
33 Second annular groove (second fitting part)
35 Overhang portion 36 Grip portion 37 Positioning convex portion 51 Annular projection (first fitting portion)
52 Annular projection (second fitting part)
53 Annular groove 54 Annular groove 55 First irregularity line 56 Second irregularity line 57 Press-fitting allowance 58 Guide part 59 Guide part

Claims (5)

A seal member is interposed in a connection part between the first part and the second part, a first uneven line is formed in the connection part of the first part, and a second uneven line is formed in the connection part of the second part. The seal member is provided with a first fitting portion that fits on the first concavo-convex strip on one surface, and a second fitting portion that fits on the second concavo-convex strip on the other surface, In the connection part seal structure provided with a press-fitting allowance in the thickness direction in the first and second fitting parts,
The seal member has an overhanging portion that projects in an outer circumferential direction from an annular seal body portion in which the first and second fitting portions are provided, and the overhanging portion of the first and second parts is A connecting portion seal structure characterized by protruding outward from the connecting portion. In the connection part seal structure according to claim 1,
The seal part has a gripping part extending in a direction orthogonal to the overhanging part at an end of the overhanging part. In the connection part seal structure according to claim 1 or claim 2,
The seal member is provided such that the positioning convex portion extends in parallel to the axis of the seal main body on both end surfaces of the overhanging portion,
The first component is provided with a first positioning hole for positioning by positioning the positioning protrusion.
The second part is provided with a second positioning hole for positioning by positioning the positioning protrusion. A seal member is interposed at a connection portion between the first component and the second component, a first annular protrusion is formed at the connection portion of the first component, and a second annular protrusion is formed at the connection portion of the second component. The seal member is provided with a first annular groove on one side into which the first annular projection is fitted, and a second annular groove on which the second annular projection is fitted on the other side, A connecting portion seal that has a press-fitting allowance in the thickness direction in the first and second annular grooves, and seals the first and second annular protrusions by press-fitting into the press-fitting allowances of the first and second annular grooves. In structure
Guide portions for guiding the first and second annular protrusions from the openings of the first and second annular grooves to the press-fitting allowance are provided at the openings of the first and second annular grooves of the seal member. A connection seal structure characterized by comprising: A seal member is interposed in a connection portion between the first component and the second component, a first annular groove is formed in the connection portion of the first component, and a second annular groove is formed in the connection portion of the second component. The seal member is provided with a first annular projection fitted on the first annular groove on one surface, and a second annular projection fitted on the second annular groove on the other surface, The first and second annular protrusions are provided with press-fitting allowances in the thickness direction, and the first and second annular protrusions are press-fitted into the first and second annular grooves. In the connection portion seal structure for sealing by fitting two annular protrusions into the first and second annular grooves,
A guide portion for guiding the press-fitting allowance of the first and second annular protrusions to the first and second annular grooves is provided at the distal end portions of the first and second annular protrusions of the seal member. Connection part seal structure.