JP2011226574A - Housing type pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a housing type pipe joint which strongly fixes a pipe in an axial direction and receives a load applied on the pipe by itself to suppress deformation of the pipe.SOLUTION: The housing type pipe joint 1 for connecting a pair of pipes P having attaching parts Pa at ends via a seal member 6 includes a plurality of housings each of which has a circular arc housing body 4, fixing parts 5 disposed at both ends of the housing body respectively, two engaging parts 4a disposed parallel to each other on the inner surface of the housing body and engaged with the pipe attaching parts, and an inner flange 10a and an outer flange 10b disposed on the inside and the outside of the engaging parts respectively and brought into contact with the outer surfaces of the pipes. The plurality of housings are arranged in a row in the diameter direction of the pipes and arranged to annularly surround the pipes, the pipes are held via the seal member between the housings and the pipes, and the pipes are fixed by fixing the fixing parts of the housing adjacent to each other.

Description

  The present invention relates to a housing type pipe joint in which ends of pipes connected to each other are connected to each other.

Conventionally, a housing type pipe joint as shown in FIG. 15 is known. The housing-type pipe joint 100 is formed by assembling a pair of housings 300 each having a substantially semicircular housing main body 400 and a flange portion 500 extending radially outward from both ends of the housing main body 400. Then, a pair of pipes P each having a circumferential groove (not shown) formed at the end of the pipe are brought into contact with each other to form a connection portion, and the connection portion surrounds the pair of housings 300 via an annular gasket 600. The housing-type pipe joint 100 is fixed so as to surround the connection portion of the pipe by inserting the bolt 800 through the bolt hole opened in the flange portion 500 which is attached and tightening the nut 900.
And as shown in FIG. 16, the claw part 400a which protrudes radially inside is formed in the both sides along the circumferential direction of the housing main body 400, respectively, and this claw part 400a is each in the groove | channel Pa of a pair of pipes P, respectively. By engaging, the pipe P is connected.

By the way, the connection method by such a housing-type pipe joint differs according to the use and purpose of the piping system. For example, in the case of a piping system that needs to cope with pipe expansion and contraction due to fine adjustment during construction and temperature changes after construction, a method of movably connecting a pipe to a housing-type pipe joint is used.
For this reason, the claw part 400a is narrower than the width of the groove Pa, and the claw part 400a is loosely fitted in the groove Pa, so that the relative movement between the pair of pipes P and the pipe P and the housing main body 400 are performed. The relative movement between is slightly allowed.

  On the other hand, there is a case where a piping system is required in which the pipe P is fixedly connected to the housing type pipe joint and the movement of the pipe P in the axial direction and the circumferential direction is restricted. As a housing-type pipe joint for such a fixed connection, a technique is disclosed in which a claw portion is formed inclined with respect to the central axis of the housing body (Patent Document 1). In this technique, a pair of housings are arranged opposite to each other so as to surround a tube, and then the housing is rotated so as to be twisted in opposite directions around the center, so that the inner edge of one of the opposing claws is Abuts against the outer edge of the annular groove of the tube, the outer edge of the other claw portion abuts against the inner edge of the annular groove of the tube, and eliminates the clearance (play) between the claw portion and the annular groove, thereby obtaining a connection without backlash. .

  Further, as shown in FIG. 17, a flange 400 c is provided on the entire outer periphery of the housing 400, and the flange 400 c is brought into close contact with the entire outer periphery of the pipe P, whereby the load applied to the pipe end is received by the flange 400 c. A technique is disclosed in which a load is not applied to the rubber ring 600 (Patent Document 2).

Utility Model 2538261 (FIGS. 2 and 5) JP 2000-257767 A (FIGS. 1 and 2)

  However, in the case of the technique described in Patent Document 1, since the claw of the housing is pressed against the outer edge of the annular groove of the tube, it can be firmly fixed in the axial direction and can withstand some bending in the radial direction. It cannot be said that the strength is sufficient for mechanical bending (such as forced bending) due to external force or the like.

In the case of the technique described in Patent Document 2, since the width of the claw portion 400a is usually narrower than the groove Pa of the pipe P, when internal pressure is applied to the pipe, the connected pipes are connected in the pipe axis direction as shown in FIG. It is difficult to move to L (the direction in which the tube end and the tube end are separated) L and complete fixing. In addition, since only the one point Tx of the flange portion 400c is in close contact with the outer peripheral surface of the tube P with respect to the claw portion 400a, it is easily affected by the moment, and when the claw portion 400a moves with respect to the groove Pa, There is a possibility that the pipe P bends with Tx as a fulcrum.
Furthermore, since there is a tolerance (tolerance) due to product variations in the outer diameter of the pipe P, setting the inner diameter of the collar 400c so that it closely contacts the nominal value of the pipe P will cause the outer diameter of the pipe P to be equal to the tolerance. When the size of the housing main body 400 increases, a gap Sx (see FIG. 15) may be generated on the mating surfaces of the housing main bodies 400, and tightening and fixing may not be possible. In this case, the housing main body 400 may not be firmly fixed to the pipe P, and the pipe P may be bent by an external force or the like, or the rubber ring 600 may not be in close contact with the air tightness.

    An object of the present invention is to provide a housing-type pipe joint that solves the above-described problems and that can firmly fix the pipe in the axial direction and that receives the load applied to the pipe by itself and suppresses the displacement of the pipe. To do.

The housing type pipe joint of the present invention is a housing type pipe joint in which a pair of pipes having a concave or convex attachment portion at an end thereof are connected via a seal member. A housing main body, fixing portions provided at both ends of the housing main body, two engaging portions provided parallel to each other on the inner surface of the housing main body and engaged with the mounting portion of the pipe, On the inner surface of the housing main body, the housing main body has a plurality of housings provided on the inner side and the outer side of the respective engaging portions, each having an inner flange portion and an outer flange portion that are in contact with the outer surface of the pipe, and the plurality of housings. The tubes are arranged in a line along the radial direction of the tube, and are arranged so as to surround the outside of the tube in an annular shape. The tube is sandwiched between the housing and the tube via the seal member, and the fixed members of the adjacent housings are arranged. It is possible to fix the pipe by fixing the parts together.
In this way, each tube is supported by the housing at the inner flange portion and the outer flange portion in the tube axis direction, so that each tube is firmly supported by the housing and has a moment against bending in a direction perpendicular to the tube axis direction. It is hard to be affected and the tube is difficult to bend.

The outer collar part and / or the inner collar part may be formed in a part along the circumferential direction of the housing body.
If it does in this way, a clearance gap will arise between a pipe | tube and a housing main body in the part in which an outer collar part (inner collar part) is not formed, and a part of material of a pipe | tube can escape in this clearance gap. Therefore, even when the outer diameter of the tube is larger than the inner diameter of the outer flange portion and / or the inner flange portion, when the tube is firmly sandwiched between the housings, the tube deforms so as to expand toward the gap. The tube can be sandwiched and assembled with the housing.
In other words, since the outer diameter of pipe products usually varies within the range of the nominal value ± tolerance, the inner diameter of the inner flange and outer flange is adjusted to the minimum value of the outer diameter of the pipe (nominal value-tolerance). In this case, the tube can be assembled even if the outer diameter of the tube is larger than that of the inner flange portion or the outer flange portion.

The outer collar part and / or the inner collar part may be formed over a length of ¼ to ½ of the entire circumference of the housing body in the circumferential direction of the housing body.
In this case, due to the above-mentioned tube support effect, the influence of the moment on the bending in the direction perpendicular to the tube axis direction is reduced, and a gap between the tube and the housing body is secured, so that the outside of the tube Even if the diameter is larger than the inner diameter of the outer flange portion (inner flange portion), the pipes can be sandwiched between the housings.

The outer collar part and the inner collar part may be formed at positions that do not overlap each other when the extending direction of the engaging part (claw part) is taken as the axis of symmetry.
By doing so, there is no region where the inner flange portion and the outer flange portion are not formed at all across the engaging portion (or this region is reduced), and the circumference that supports the tube with the inner flange portion and the outer flange portion The upper region is increased, and the influence of the moment is reduced with respect to the bending in the direction perpendicular to the tube axis direction, so that the tube is difficult to bend.

  The outer collar part and / or the inner collar part may be formed at one place or a plurality of places in the circumferential direction of the housing body.

The fixing portions of the adjacent housings can be fixed at positions where the longitudinal axes of the adjacent housings intersect. In this way, by fixing the adjacent housing axes so that they intersect. When the engaging portions of different housings are engaged with the attachment portions of the tubes, the intervals between the engaging portions in the tube axis direction are widened, and the engaging portions are firmly fixed to the tube.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to fix a pipe | tube firmly to an axial direction, the load applied to a pipe | tube is received by itself and the housing type pipe joint which suppressed the displacement of the pipe | tube is obtained.

It is a perspective view when a pair of housing main bodies which constitute a housing type pipe joint concerning a 1st embodiment of the present invention are arranged facing. It is the schematic which shows the method of assembling | attaching a pair of housing of FIG. 1 to a pair of pipe | tube. It is the schematic which shows the state which engaged one claw part of a pair of housing with the edge part groove | channel of one pipe | tube. It is the schematic which looked at the housing of FIG. 1 from the inner surface side. It is the schematic of the cross section cut | disconnected by the DD plane of FIG. It is the schematic of the cross section cut | disconnected by the AA surface of FIG. It is the schematic of the cross section cut | disconnected by the BB surface of FIG. It is the schematic of the cross section which shows the aspect which deform | transforms so that a pipe may expand toward a clearance gap. FIG. 3 is an external view of each housing when viewed from an E direction in FIG. 2 (a direction parallel to the tube axis direction). It is a perspective view when a pair of housing which comprises the housing type pipe joint which concerns on the 2nd Embodiment of this invention is arrange | positioned facing. It is a perspective view when a pair of housing which comprises the housing type pipe joint which concerns on the 3rd Embodiment of this invention is arrange | positioned facing each other. It is the schematic of the cross section cut | disconnected by the surface perpendicular | vertical to a pipe-axis direction, when the housing type pipe joint which concerns on the 4th Embodiment of this invention is attached to a pipe | tube. It is the schematic seen from the top when the housing type pipe joint of FIG. 12 is attached to a pipe | tube. It is the fragmentary sectional view which showed the outline of the housing type pipe joint which concerns on the 5th Embodiment of this invention. It is the schematic of the cross section which cut | disconnected the conventional housing type pipe joint by the surface perpendicular | vertical to the pipe-axis direction. It is the schematic of the cross section which cut | disconnected the conventional housing type pipe joint by the surface parallel to a pipe-axis direction. It is the schematic of another cross section which cut | disconnected the conventional housing type pipe joint by the surface parallel to a pipe-axis direction.

Hereinafter, the present invention will be described in detail, but the present invention is not limited thereby.
First, with reference to FIGS. 1-9, the housing type pipe joint 1 which concerns on the 1st Embodiment of this invention is demonstrated.

FIG. 1 is a perspective view when a pair of housings 3 constituting the housing-type pipe joint 1 are arranged to face each other. Although a tube is not shown to show the inner surface of the housing 3, the tube extends along the tube axis direction L and is sandwiched between a pair of housings 3.
Each housing 3 includes a semi-circular housing main body 4, flange portions 5 provided at both ends of the housing main body 4 and extending radially outward, and parallel to the inner surface of the housing main body 4. And a pair of engaging portions (claw portions) 4a.
The claw portions 4 a are provided on both side portions along the circumferential direction of the housing body 4, and project inward in the radial direction of the housing body 4. And this pipe | tube is connected because this nail | claw part 4a engages with the groove | channel (concave attachment part) each formed along the circumferential direction of the edge part of a pair of pipe | tube (not shown). The flange portion 5 has an oval insertion hole 5h for passing a fastening bolt (not shown). Then, the housing-type pipe joint 1 is fixed so as to surround the pipe connection portion by inserting a fastening bolt into the insertion hole 5h with the flange portions 5 facing each other and tightening a nut (not shown). The fastening bolt and the nut constitute a “fastener”.
On the other hand, between the pair of claw portions 4a, the housing body 4 forms a recess 4b that is recessed outward, and the recess 4b has a seal member (not shown) that seals between the tube and the housing body 4. Can be accommodated. In addition, although a pair of pipe | tube is attached so that it may become substantially coaxial, the axis | shafts of the connected pipe | tube may be connected in the state in which the axis | shafts decentered somewhat and the angle produced.

Furthermore, on the inner surface of the housing main body 4, an inner flange portion 10a and an outer flange portion 10b that are in contact with the outer surface of the pipe are provided on the inner side and the outer side of each claw portion 4a, respectively. Here, the inside of the claw portion 4 a is a portion surrounded by the pair of claw portions 4 a, and the outside of the claw portion 4 a is an outer edge side along the circumferential direction of the housing body 4.
The outer flange portion 10b protrudes in a direction perpendicular to the circumferential direction of the housing main body 4 (tube axis direction L), and a part along the circumferential direction of the housing main body 4 (1/2 length of the entire circumference of the housing main body 4). ).
Further, the inner flange portion 10a extends from each claw portion 4a toward the inner side in the tube axis direction L of the housing body 4, and further a part along the circumferential direction of the housing body 4 (1/2 of the entire circumference of the housing body 4). Length).
Further, the outer flange portion 10b and the inner flange portion 10a are formed at positions where they do not overlap each other (for example, diagonally across the nail portion) when the extending direction of each claw portion 4a is taken as the axis of symmetry. For example, when the claw portion 4a on the front side of the lower housing of FIG. 1 is viewed, the outer flange portion 10b is formed in the left half of the housing body 4 in the circumferential direction, and the inner flange portion 10a is in the circumferential direction of the housing body 4 It is formed in the right half of. In the present invention, it is necessary that both the outer flange portion 10b and the inner flange portion 10a are formed with the claws 4a interposed therebetween.

  In each housing 3, a convex portion 5 a extending in the tube axis direction L is formed on the inner surface of one flange portion 5, while a concave portion 5 b is formed on the inner surface of the other flange portion 5. And the recess 5b may be combined and the housings 3 may be rotated and fixed in opposite directions when the fastener is tightened.

FIG. 2 is a schematic view showing a method of assembling the pair of housings 3 in FIG. 1 to the pair of pipes P ₁ and P ₂ . A seal member (annular gasket, not shown) is placed on the connection portion where the pair of pipes P ₁ and P ₂ are abutted with each other, and the pair of housings 3 are disposed so as to surround the seal member. Then, by inserting the fastening bolt 8 into the insertion hole 5h of the opposing flange portion 5 and tightening the nut (not shown), the housing-type pipe joint 1 is fixed with the connection portions of the pipes P ₁ and P ₂ interposed therebetween. The
Here, the insertion hole 5h is in the shape of an ellipse that is long in the L direction, play is provided in the L direction between the insertion hole 5h and the fastening bolt 8, each flange portion 5 is loosely tightened with the fastening bolt 8, and each housing 3 is centered on each other. You may make it rotate so that the vicinity may be twisted symmetrically. Alternatively, the insertion hole 5h may be formed at a position eccentric from the center of the housing 3 in the L direction, and the housings 3 may be rotated in opposite directions when the opposing housings 3 are tightened with fasteners.
In this way, the flange portions 5 of the housings 3 can be fixed at a position where the longitudinal axis (axis perpendicular to the L direction) of the housings 3 intersects. As a result, as described in FIG. 3 below, the claw portions 4a can be fixed in a state in which the interval in the L direction is widened.

FIG. 3 shows a state in which one opposing claw portion 4a of the pair of housings is engaged with the groove Pa at the end of one tube P. When sandwich the pipe P ₁ by a pair of housing 3, the claw portion 4a formed respectively on each housing 3 engage from above and below the groove Pa of the pipe P _1. When the fasteners are tightened in this state and the respective housings 3 are rotated in opposite directions to be displaced from each other in the tube axis direction L (see FIG. 2), the distance between the upper and lower claw portions 4a in the L direction is increased. spread. In the example of FIG. 3, the claw portion 4 (solid line in FIG. 3) formed in the upper housing 3 rotates counterclockwise and comes into contact with the side wall of the groove Pa. On the other hand, the claw portion 4 (dotted line in FIG. 3) formed in the lower housing 3 rotates clockwise and comes into contact with the side wall of the groove Pa.
By tightening the fasteners in this way, the distance between the claw portions 4a in the L direction is widened, and each claw portion 4a is engaged with the groove Pa without clearance (play). And the housings 3 are fixed. For even the pipe _{P 2,} it is the same.

Next, with reference to FIG. 4, FIG. 5, the effect | action of the outer collar part 10b and the inner collar part 10a is demonstrated.
FIG. 4 is a schematic view of the housing 3 of FIG. 1 as viewed from the inner surface side. The outer flange portion 10 b and the inner flange portion 10 a are formed along the circumferential direction of the housing body 4 over a length that is ½ of the entire circumference of the housing body 4. Further, the outer flange portion 10b and the inner flange portion 10a are formed at positions that do not overlap each other when the extending direction of each claw portion 4a is taken as the axis of symmetry.

5 is a cross-sectional view taken along line D (see also FIG. 1) in FIG. Here, the contact surface between the inner flange portion 10a and the pipes P ₁ and P ₂ is T ₁ , and the contact surface between the outer flange portion 10b and the tubes P ₁ and P ₂ is T ₂ . _On the upper and lower sides of the pipes P ₁ and P ₂ , only one of the outer flange portion 10 b and the inner flange portion 10 a is formed with the individual claw portions 4 a interposed therebetween. However, the pipe _P 1, when viewed across the respective upper and lower _{P 2,} each tube _P 1, _{P 2} is an inner flange portion 10a and the outer flange portion 10b of the housing 3 at two different points _T 1, _{T 2} of the L direction It is supported by. For example, the pipe _{P 1} is in contact with the inner flange portion 10a and the _{T 1} in the upper itself, in contact with the underside of its outside flange portion 10b and _{T 2.}
Therefore, the pipes P ₁ and P ₂ are firmly supported by the housing 3, respectively, are not easily influenced by the moment with respect to the bending in the M direction perpendicular to the L direction, and the pipes P ₁ and P ₂ are difficult to bend.
The inner flange portion 10a is disposed on both sides (each claw portion 4a side) with the central axis C (see FIG. 4) along the circumferential direction of the housing main body 4 sandwiched between the pipes P ₁ and P ₂ at T ₁ . Each needs to be placed.

Next, the reason why the outer flange portion 10b and the inner flange portion 10a are formed in a part along the circumferential direction of the housing body 4 will be described with reference to FIGS.
6 is a schematic view of a cross section taken along the plane AA of FIG. In the schematic view of the AA cut surface from the direction of the arrow, the seal member (annular gasket) 6 accommodated in the recess 4b of the housing body 4 is in contact with the outer surface of the butt connection portion of the pipe P and seals the connection portion. .

  On the other hand, FIG. 7 is a schematic view of a cross section taken along the plane BB of FIG. The inner flange 10a is formed on the left half along the circumferential direction of one housing body 4 above the pipe P, and is formed on the right half along the circumferential direction of the other housing body 4 below the pipe P. .

  Normally, the outer diameter of the product of the pipe P varies within the range of the nominal value ± tolerance. Therefore, even if the inner diameter of the inner flange 10a and the outer flange 10b is set equal to the nominal value of the pipe P, the outer diameter of the pipe P When the diameter is the smallest (nominal value-tolerance), the inner flange portion 10a and the outer flange portion 10b do not contact the outer surface of the pipe P exactly. On the other hand, when the inner diameters of the inner flange portion 10a and the outer flange portion 10b are adjusted to the minimum value (nominal value-tolerance) of the outer diameter of the pipe P, each housing 3 is changed when the outer diameter of the pipe P becomes larger than this. Therefore, the pipe P cannot be sandwiched and attached.

Therefore, when the inner flange portion 10a is formed only in a part along the circumferential direction of the housing body 4, even if the outer diameter of the pipe P is larger than the inner diameter of the inner flange portion 10a, the inner flange portion 10a is not formed. in the gap S ₁ is formed between the pipe P and the housing body 4 can be in the gap S ₁ is a part of the material of the pipe P escape.
Accordingly, as shown in FIG. 8, when firmly sandwich the pipe P in the housing 3, since the pipe P is deformed so as to extend toward the gap S _1, than the inner diameter of the inner flange portion 10a is the outer diameter of the pipe P Even if it is large, the pipes P can be sandwiched between the housings 3.

FIG. 9 is an external view of each housing 3 when viewed from the E direction in FIG. 2 (a direction parallel to the tube axis direction L). The outer flange portion 10 b is formed on the right half along the circumferential direction of the housing body 4 above the pipe P, and is formed on the left half along the circumferential direction of the housing body 4 below the pipe P.
Thus, when the outer flange portion 10b is formed in a part along the circumferential direction of the housing body 4, the outer flange portion 10b is not formed even when the outer diameter of the pipe P is larger than the inner diameter of the outer flange portion 10b. Part of the material of the tube P can escape to the part. Therefore, similarly to the case of FIG. 8, even when the outer diameter of the pipe P is larger than the inner diameter of the outer flange portion 10b, the pipe P can be sandwiched between the housings 3.

The outer flange portion 10 b and / or the inner flange portion 10 a may be formed over a length of ¼ to ½ of the entire circumference of the housing body in the circumferential direction of the housing body 4.
When the outer flange portion 10b and / or the inner flange portion 10a is formed with a length less than ¼ of the entire circumference of the housing body in the circumferential direction of the housing body 4, the above-described tube support effect is reduced, and M May be susceptible to moments for directional bending. On the other hand, when the outer flange portion 10b and / or the inner flange portion 10a is formed to have a length exceeding 1/2 of the entire circumference of the housing body in the circumferential direction of the housing body 4, the pipe P and the housing body 4 described above When the outer diameter of the pipe P is larger than the inner diameter of the outer flange part 10b (inner flange part 10a), it may be difficult to sandwich the pipe P between the housings 3.

  Further, when the inner flange portion 10a and the outer flange portion 10b are formed only in a part along the circumferential direction of the housing body 4, the inner flange portion 10a and the outer flange portion 10b are extended in the direction in which the one claw portion 4a extends. Preferably, they are formed at positions that do not overlap with each other (where they are not symmetrical, that is, diagonally across the nail portion). If the inner flange portion 10a and the outer flange portion 10b are only positioned so as to overlap when the extending direction of the claw portion 4a is taken as the axis of symmetry (facing the claw portion 4a), the inner flange portion There is a region where the portion 10a and the outer flange portion 10b are not formed at all. In this region, the pipe P is not supported by the inner flange portion 10a or the outer flange portion 10b, and is easily bent due to the influence of the moment on the bending in the M direction. Because it becomes.

Next, a housing type pipe joint 11 according to a second embodiment of the present invention will be described with reference to FIG. FIG. 10 is a perspective view when a pair of housings 3 constituting the housing-type pipe joint 11 according to the second embodiment are arranged to face each other, and corresponds to FIG.
The housing-type pipe joint 11 according to the second embodiment is the same as the housing-type pipe joint 11 according to the first embodiment except that the formation positions of the outer collar part 10b and the inner collar part 10a are different. Description of the portion is omitted.

In FIG. 10, an inner flange portion 10a and an outer flange portion 10b that are in contact with the outer surface of the pipe are respectively provided on the inner side and the outer side of each claw portion 4a on the inner surface of the housing body 4. Further, the inner flange portion 10 a and the outer flange portion 10 b are formed on the entire circumference of the housing body 4 in the circumferential direction.
In the second embodiment, the tube is supported by the inner flange portion 10a and the outer flange portion 10b of the housing 3 at two different points _T 1, _{T 2} of the L direction. Accordingly, the pipes are firmly supported by the housing 3 and are not easily affected by the moment with respect to the bending in the M direction perpendicular to the L direction, and the pipes are difficult to bend.
In particular, since the inner flange portion 10a and the outer flange portion 10b are formed on the entire circumference in the circumferential direction of the housing body 4, the support of the tube becomes stronger.

Next, a housing type pipe joint 12 according to a third embodiment of the present invention will be described with reference to FIG. FIG. 11 is a perspective view when a pair of housings 3 constituting the housing-type pipe joint 12 according to the third embodiment are arranged to face each other, and corresponds to FIG.
The housing-type pipe joint 12 according to the third embodiment is the same as the housing-type pipe joint 12 according to the first embodiment except that the formation positions of the outer collar part 10b and the inner collar part 10a are different. Description of the portion is omitted.

In FIG. 11, an inner flange portion 10 a and an outer flange portion 10 b that are in contact with the outer surface of the pipe are respectively provided on the inner side and the outer side of each claw portion 4 a on the inner surface of the housing body 4. The inner flange portion 10 a is formed on the entire circumference of the housing body 4 in the circumferential direction. On the other hand, the outer flange portion 10 b is formed separately at two locations in the circumferential direction of the housing body 4, and the outer flange portion 10 b is not formed at the circumferential central portion of the housing body 4.
Also in the third embodiment, the pipe is supported by the inner flange portion 10a and the outer flange portion 10b of the housing 3 at two places T ₁ and T ₂ having different L directions. Accordingly, the pipes are firmly supported by the housing 3 and are not easily affected by the moment with respect to the bending in the M direction perpendicular to the L direction, and the pipes are difficult to bend.
Further, since the outer flange portion 10b is formed at a part of the circumferential direction of the housing body 4, similarly to the first embodiment, even when the outer diameter of the tube is larger than the inner diameter of the inner flange portion 10a. The tube can be sandwiched between the housings 3.

  Next, a housing type pipe joint 13 according to a fourth embodiment of the present invention will be described with reference to FIGS. FIG. 12 is a cross-sectional view taken along a plane perpendicular to the pipe axis direction L when the housing-type pipe joint 13 according to the fourth embodiment is attached to a pipe. The housing type pipe joint 13 according to the fourth embodiment is the same as that of the first embodiment except that a flange is not formed at one end of both ends of the housing body 4 and a hinge 70 is provided instead. The same parts as those in FIG. 1 are denoted by the same reference numerals as those in FIG.

In FIG. 12, the housing-type pipe joint 13 is connected to a substantially semicircular housing body 4, a flange portion 5 extending radially outward at one end of both ends of the housing body 4, and the other end of the housing body 4. A pair of housings 31a and 31b each having a hinge 70 are assembled. Here, the hinge 70 includes a piece-like hinge base portion 72 connected on the central axis C at the other end of the upper housing 31a, a pair of circular shaft support portions 71 sandwiching the hinge base portion 72, and a shaft support portion. 71 and a bolt 73 inserted into a hole penetrating the hinge base portion 72 in the tube axis direction L, and a nut 74 (not shown).
The base end of each shaft support portion 71 is connected to the other end of the lower housing 31b, and the hinge base portion 72 rotates relative to the shaft support portion 71 with the bolt 73 as an axis, whereby the upper housing 31a. Is opened with respect to the lower housing 31b so that the tube P can be taken in and out.
In the fourth embodiment, the “fastener” includes a bolt 8, a nut 9, and a hinge 70 that fix the flange 5.

  FIG. 13 is a schematic view seen from above when the housing type pipe joint 13 according to the fourth embodiment of FIG. 12 is attached to a pipe. Since each shaft support portion 71 has a predetermined gap G with the hinge base portion 72, the housings 31a and 31b can be rotated so as to be twisted with each other as in the first embodiment. In other words, play is provided between the hinge base portion 72 and the shaft support portions 71 so that the housings can be displaced from each other by rotating the housings. In the case of the fourth embodiment, one end of each of the housings 31 a and 31 b is connected to the hinge 70, so that the not-shown convex portions 5 a and concave portions 5 b may be provided only on the inner surface of the flange 5. The flange 5 has an elliptical insertion hole similar to that of the first embodiment.

According to the fourth embodiment, since each housing 31a, 31b is connected to the hinge 70, there is no need to select a pair of housings, and one of the housings is not lost during the operation. Also improves.
Also in the fourth embodiment, the pipe is supported by the inner flange portion 10a and the outer flange portion 10b of the housings 31a and 31b at two places T ₁ and T ₂ having different L directions. Accordingly, the pipes are firmly supported by the housings 31a and 31b, respectively, and are hardly affected by the moment with respect to the bending in the M direction perpendicular to the L direction, and the pipes are difficult to bend.

Next, a housing type pipe joint 14 according to a fifth embodiment of the present invention will be described with reference to FIG. FIG. 14 is a partial cross-sectional view of the housing-type pipe joint 14 according to the fifth embodiment when cut along the pipe axis direction L. FIG.
The housing-type pipe joint 14 according to the fifth embodiment is the first except that the attachment portion of the pipe P is a projection Pb and the engagement portion of the housing is a recess 42b corresponding to the projection Pb. Since it is the same as that of the housing type pipe joint according to the embodiment, the description of the same part is omitted.

  In FIG. 14, an inner flange portion 12 a and an outer flange portion 12 b that are in contact with the outer surface of the pipe are respectively provided on the inner side and the outer side of each recess 42 b on the inner surface of the housing body 42. Further, the inner flange portion 12 a and the outer flange portion 12 b are formed on the entire circumference of the housing body 42 in the circumferential direction. The inner flange portion 12a and the outer flange portion 12b are in contact with the outer surface of the pipe P. The width Lw in the tube axis direction L of the recess 42b is wider than the width of the tube protrusion Pb (attachment portion). Then, when the housings 32 are rotated so as to twist each other as in the first embodiment, the interval in the L direction between the opposing recesses 42b is expanded (see the positions of the recesses 42b in FIG. 14), and the recesses 42b are projected Pb. And can be firmly fixed without play.

Also in the fifth embodiment, the pipe is supported by the inner flange portion 12a and the outer flange portion 12b of the housing 32 at two places T ₁ and T ₂ having different L directions. Therefore, the pipes are respectively firmly supported by the housing 32, are not easily affected by the moment with respect to the bending in the M direction perpendicular to the L direction, and the pipes are difficult to bend.
As in the first embodiment, the inner flange portion 12a and / or the outer flange portion 12b may be formed in a part of the circumferential direction of the housing body 4. In this case, as in the first embodiment, Even when the outer diameter of the tube is larger than the inner diameter of the inner flange portion 12a (outer flange portion 12b), the tube can be sandwiched between the housings 3.

It goes without saying that the present invention is not limited to the above-described embodiments, and extends to various modifications and equivalents included in the spirit and scope of the present invention.
For example, in the above-described embodiment, the pipe is surrounded and fixed by a pair of (two) housings, but the pipe may be surrounded and fixed by three or more housings. In addition, when fixing a pipe | tube with three housings, the housing main body of each housing makes circular arc shape of about 1/3 circle | round | yen, and when these are put in a line, it will become an annular shape and will enclose the outer side of a pipe | tube. . Similarly, when fixing a pipe | tube with four housings, the housing main body of each housing makes circular arc shape of about 1/4 circle. Furthermore, when enclosing a pipe | tube with three or more housings, the adjacent part of each housing may be connected by a hinge, and a fixing | fixed part may be provided only in the housing used as both ends.
Further, the fixing portion is not limited to the flange portion, and any fixing portion may be used as long as adjacent housings are fixed when the pipes are surrounded by the respective housings.

1, 11-14 Housing type pipe joint 3, 31a, 31b, 32 Housing 4, 42 Housing body 4a, 42b Engagement part (claw part)
5 Flange (fixed part)
5h Insertion hole 6 Sealing member 8 Fastening bolt 10a, 12a Inner flange part 10b, 12b Outer flange part P pipe Pa, Pb pipe attachment part L Pipe axis direction

Claims (6)

In a housing-type pipe joint for connecting a pair of pipes having a concave or convex attachment portion at an end thereof via a seal member,
An arcuate housing body that is part of an annulus,
Fixing portions respectively provided at both ends of the housing body;
Two engaging portions that are provided in parallel to each other on the inner surface of the housing body and engage with the mounting portion of the tube;
On the inner surface of the housing body, an inner flange portion and an outer flange portion that are provided on the inner side and the outer side of each of the engagement portions, respectively, and are in contact with the outer surface of the pipe,
A plurality of housings with
The plurality of housings are arranged in a line along the radial direction of the pipes, are arranged so as to surround the outside of the pipes in an annular shape, and the pipes are sandwiched between the housings and the pipes with the seal member interposed therebetween. A housing type pipe joint capable of fixing the pipe by fixing the fixing portions of the housing to be fixed.   2. The housing-type pipe joint according to claim 1, wherein the outer flange portion and the inner flange portion are formed in a part along a circumferential direction of the housing body.   The housing-shaped tube according to claim 2, wherein the outer flange portion and the inner flange portion are formed over a length of 1/4 to 1/2 of the entire circumference of the housing body in the circumferential direction of the housing body. Fittings.   4. The housing-type pipe joint according to claim 2, wherein the outer flange portion and the inner flange portion are formed at positions that do not overlap each other when the extending direction of the engaging portion is taken as an axis of symmetry.   The housing-type pipe joint according to any one of claims 2 to 4, wherein the outer flange portion and the inner flange portion are formed at one place or a plurality of places in a circumferential direction of the housing body.   The housing-type pipe joint according to any one of claims 2 to 5, wherein the fixing portions of the adjacent housings can be fixed at positions where longitudinal axes of the adjacent housings intersect.

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