JPH11241794A - Housing type fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely fix the tip parts of two pipes, even if a difference exists in depth of peripheral grooves of the pipes, by providing a projected line which continuously extends from a joint surface to a specified angle location adjacently to a faucet coupling part and allowed to abut on a side wall of a peripheral direction groove of one pipe. SOLUTION: In a pair of circular-arc coupling segments 20, 20a, one projecting engagement part 22a is oppositely arranged against the other recessed engagement part 22b, the engagement parts 22a and 22b are closed up each other for faucet coupling. Fastening parts 24, 25 have circular-arc projected lines 26, 29 which project inward to one end side of a peripheral direction and are allowed to abut on a side wall 3a close to a pipe end of a peripheral direction groove 3 provided on tip parts of pipes 4, 5 and circular-arc projected lines 27, 28 which project outward to the other end side of the peripheral direction and are allowed to abut on a side wall 3b is far from the pipe end of the peripheral direction groove 3. The circular-arc projected lines 26, 27, 28, 29 are continuously extended up to a location of about 45 deg. from a joint surface. The abutting surface to the pipe side wall of each circular-arc projected line becomes a surface parallel to surfaces which are orthogonally crossed with shaft lines of the pipes 4, 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing type pipe joint used for sealing abutting ends of two tubes and for securely fixing the two tubes.

[0002]

2. Description of the Related Art As a housing type pipe joint for sealing a pipe end, a housing type pipe joint having a structure shown in FIG. 14 is used in many industries. The housing-type pipe joint includes a pair of arc-shaped joint segments 1 and 2 and a space 6 for accommodating ends of two pipes 4 and 5 each having a circumferential groove 3 formed in each arc-shaped joint segment. An elastic ring 7 is provided in the space 6 to seal the ends of the two tubes 4, 5, and each of the two tubes 4, 5, which extend radially inward on both sides of the space 6 and are accommodated therein. It is formed from two fastening parts 8, 9 which engage in the directional groove 3 and mounting means 10 for connecting the pair of joint segments 1, 2 to each other.

[0003] The housing type pipe joint is formed by pressing against the outer peripheral surfaces of the ends of the two pipes 4 and 5 with elastic rings 7 disposed in the spaces 6 and 6 of the pair of arcuate joint segments 1 and 2. The ends of the tubes 4 and 5 are sealed, and the fastening portions 8 and 9 provided on each joint segment 1 and 2 are connected to the two tubes 4 and 5.
The two tubes 4 and 5 are fixed to the arc-shaped joint segments 1 and 2 by pressing against the bottom of the circumferential groove 3 provided at the end of the circular joint.

[0004]

In the above housing type pipe joint, the tightening portion provided on each joint segment is dimensioned such that the end of the tightening portion is pressed against the bottom of the circumferential groove provided on the pipe. The nominal diameter of the tubes used should be the same, but there will be a substantial difference in the diameter of the tubes, and a difference in the depth of the circumferential groove of the tubes, and therefore There is a difference in the pressure contact force, the fastening of the pipe by the tightening part is weakened, the ends of the two pipes cannot be fixed securely, and the ends of the two pipes expand or contract at the joint part, Alternatively, there is a problem that a bending phenomenon occurs. Further, in the above housing type pipe joint, since the abutment portion of the pair of arc-shaped joint segments has a metal touch structure, the middle of the pipe being tightened due to the outer diameter tolerance of the pipe and the manufacturing dimension tolerance of the arc-shaped joint segment. At this stage, the arc-shaped joint segments may have a metal touch with each other, so that the ends of the two pipes cannot be reliably fixed at the tightening portion.

The present invention has been made in view of the above points, and provides a housing type pipe joint capable of securely fixing the ends of two pipes even if the depths of the circumferential grooves of the pipes are different. The purpose is to:

[0006]

SUMMARY OF THE INVENTION A housing type pipe joint according to the present invention has a space for accommodating a pair of arcuate joint segments, a pair of pipe ends formed in each arcuate joint segment, and an elastic ring. And a pair of tightening portions provided on both sides of this space and engaging with the circumferential grooves of the respective pipes, an ingot connecting portions provided on both end surfaces of the arc-shaped joint segment, and a pair of arc-shaped joint segments. Mounting means for coupling to each other, wherein the inlay connecting portion has a convex engaging portion and a concave engaging portion having the same width, and the convex engaging portion of one of the ingot connecting portions and the other inlay connecting portion Are arranged so that the concave engaging portions of the connecting portions face each other, and one of the tightening portions is adjacent to the convex engaging portion of the seal connecting portion provided on one end surface, and is approximately 45 degrees from the joining surface.
The protrusion extends continuously to the angular position of about one degree and is approximately 45 from the joint surface adjacent to the ridge contacting the side wall far from the tube end of the circumferential groove of one of the tubes and the concave engagement portion of the seal connecting portion provided on the other end surface. A protruding ridge extending continuously to an angular position of a degree and abutting on a side wall near a pipe end of a circumferential groove of one of the pipes, and the other of the above-mentioned tightening portions is a concave engagement portion of an indigo connecting portion provided on one end surface A protruding ridge extending continuously from the joining surface to an angle of about 45 degrees adjacent to the joint and abutting on the side wall near the pipe end of the circumferential groove of the other pipe, and a convex shape of an indigo joint provided on the other end face It is characterized in that it has a ridge extending continuously from the joint surface to an angle position of about 45 degrees adjacent to the engaging portion and abutting on a side wall far from the pipe end of the circumferential groove of the other pipe. The housing type pipe joint of the present invention is provided on both sides of the pair of arc-shaped joint segments, a space for accommodating the ends of the pair of pipes formed in each of the arc-shaped joint segments and an elastic ring, and both sides of the space. A pair of tightening portions that engage with the circumferential grooves of the respective pipes, an ingot connecting portion provided on both end surfaces of the arc-shaped joint segment, and mounting means for connecting the pair of arc-shaped joint segments to each other. The above-mentioned intaglio connecting portion has a convex engaging portion and a concave engaging portion having the same width, and the convex engaging portion of one ingot connecting portion and the concave engaging portion of the other ingot connecting portion face each other. One of the fastening portions extends continuously from the joining surface to an angle position of about 45 degrees adjacent to the convex engaging portion of the seal connecting portion provided on one end surface, and the outer surface is Clamping part and other end face that contact the side wall far from the pipe end of the circumferential groove of one pipe Tightening that continuously extends from the joint surface to an angle position of about 45 degrees adjacent to the concave engagement portion of the provided indigo joint portion so that the inner surface abuts on the side wall near the end of the circumferential groove of one of the tubes. The other of the tightening portions is adjacent to the concave engagement portion of the seal connecting portion provided on one end surface and continuously extends from the joint surface to an angle position of about 45 degrees from the joint surface, and the inner surface is connected to the other tube. And extending continuously from the joint surface to an angle position of about 45 degrees from the joint surface adjacent to the fastening portion abutting on the side wall near the pipe end of the circumferential groove and the convex engagement portion of the seal connecting portion provided on the other end surface. It is characterized in that it has a fastening portion that abuts a side surface on a side wall far from a pipe end of a circumferential groove of the other pipe.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 20 denotes one of the pair of arc-shaped joint segments of the housing-type pipe joint according to the present invention. Since the arcuate joint segments 20 and 20a forming a pair have the same configuration,
Only one arc-shaped joint segment 20 will be described.

As shown in FIGS. 1 to 4, the arc-shaped joint segment 20 has an inlay connecting portion 21 on both end surfaces. The inro joining portion 21 includes a convex engaging portion 22a having a width approximately half the width of the arc-shaped joint segment 20 and a concave engaging portion 22b having a width approximately half the width. The seal connecting portions 21 and 21 provided on both end surfaces are configured such that the convex engaging portion 22a and the concave engaging portion 22b of one seal connecting portion are replaced with the concave engaging portion 22b and the convex engaging portion of the other seal connecting portion. It is arranged so as to face 22a. As shown in FIGS. 3 and 4, the arcuate joint segment 20 and the arcuate joint segment 20a are joined together by moving them toward each other,
They are integrally connected by ordinary mounting means 10 such as bolts and nuts.

As shown in FIGS. 1 to 3, the arc-shaped joint segment 20 includes the ends of the tubes 4 and 5 provided with the circumferential grooves 3 and the elastic ring 7 surrounding the ends of the tubes 4 and 5. It has a space 23 for accommodation. One side of the space 23 has a fastening portion 2 extending radially inward from one side wall of the space 23.
4 are formed. As shown in FIG. 3, the fastening portion 24 fits into the circumferential groove 3 provided at the end of one of the tubes 4 to fix the end of the tube 4 to the arc-shaped joint segment 20. On the other side of the space 23, a fastening portion 25 extending inward in the radial direction from the other side wall of the space 23 is formed. Tightening part 25
As shown in FIG. 3, the end of the tube 5 is fitted into the circumferential groove 3 provided at the end of the
Fix to 0.

The fastening portion 24 has an end surface having the same radius of curvature from one end in the circumferential direction (upper side in FIG. 2) to the other end in the circumferential direction (lower side in FIG. 2). The fastening part 24
As shown in FIGS. 1 and 2, an arc-shaped ridge 26 protruding inward at one end in the circumferential direction and abutting against a side wall 3 a near the pipe end of a circumferential groove 3 provided at one end of one pipe 4. The other end in the circumferential direction has an arc-shaped ridge 27 protruding outward and abutting on the side wall 3 b far from the end of the circumferential groove 3 of the one tube 4. The arc-shaped ridge 26 and the arc-shaped ridge 27 are approximately 4
It extends continuously to the position of 5 degrees. The contact surfaces of the arc-shaped ridges 26 and the arc-shaped ridges 27 on the side wall of the pipe are planes parallel to a plane orthogonal to the axis of the pipe.

Similar to the fastening portion 24, the fastening portion 25 has an end face having the same radius of curvature from one end in the circumferential direction (upper side in FIG. 2) to the other end in the circumferential direction (lower side in FIG. 2). Have. As shown in FIG. 1 and FIG.
An arc-shaped ridge 28 protruding outward at one end in the circumferential direction and abutting against a side wall 3b far from the pipe end of the circumferential groove 3 provided at the end of the other pipe 5; To the other tube 5
Of the circumferential groove 3 provided at the end of the circular groove 3 has an arcuate ridge 29 which abuts on the side wall 3a near the pipe end. The arc-shaped ridges 28 and 29 also extend from the joint surface 30 to about 45 degrees from the joint surface 30 similarly to the arc-shaped ridges 26 and 27, and the contact surface with the side wall of the tube is the axis of the tube. Is a plane parallel to a plane orthogonal to.

The outwardly projecting arc-shaped ridges 27 provided on the fastening portion 24 and the outwardly projecting arc-shaped ridges 28 provided on the fastening portion 25 are shown in FIGS. 1 and 2. The fastening portions 2 are located on the side of the convex engaging portions 22a of the
The inwardly protruding arc-shaped ridges 26 provided on the indentation 4 and the inwardly protruding arc-shaped ridges 29 provided on the fastening portion 25 are located on the concave engagement portion 22b side of each of the intaglio coupling portions 21. doing.

As shown in FIG. 5 (a), the arcuate joint segment 20 and the arcuate joint segment 20a have a concave engaging portion 22b and a convex engaging portion 22a of one of the oppositely arranged seal connecting portions 21. Recessed engaging portion 22 of the other indigo joining portion 21
B is engaged with the protruding engagement portion 22a to be joined together.

Next, the procedure for assembling the housing type pipe joint will be described. As a preparatory step for fixing the ends of the pair of tubes 4 and 5 to the housing type pipe joint, the tubes 4 and 5 are mounted so that the ends thereof abut each other from both sides of the elastic ring 7 to form a fluid tight seal assembly. I do.

Next, the above-mentioned assembly is arranged on the arc-shaped joint segment 20 so that the elastic ring 7 enters the space 23. In FIG. 5A, the elastic ring is omitted for clarity of description.

Next, the other arc-shaped joint segment 20
5A, the concave engagement portion 22b and the convex engagement portion 22a correspond to the convex engagement portion 22a and the concave engagement portion 22b of the arc-shaped joint segment 20, as shown in FIG. Arc-shaped joint segment 2
0 and the arc-shaped joint segments 20a are pressed in a direction approaching each other to fit the convex engaging portions 22a into the concave engaging portions 22b.

Before the arcuate joint segment 20 and the arcuate joint segment 20a are fitted, as shown in FIG. 5 (a), the tightening portion 24 of the arcuate joint segment 20 At the bottom of the circumferential groove 3 of the pipe 4, floats from the bottom of the circumferential groove 3 of the pipe 4 on the side of the arc-shaped ridge 27, and the fastening portion 25 of the arc-shaped joint segment 20
9 contacts the bottom surface of the circumferential groove 3 of the pipe 5 on the
At the side 8, it floats from the bottom surface of the circumferential groove 3 of the pipe 5, and the arc-shaped ridges 26 and 27 of the fastening portion 24 and the arc-shaped ridge 2 of the fastening portion 25
8 and 29 are in idle positions spaced apart from the side walls 3a of the circumferential groove 3 of the tubes 4 and 5, respectively. Although the arc-shaped joint segment 20a is not shown in FIG. 5B, the fastening portions 24a and 25a of the arc-shaped joint segment 20a operate in the opposite manner to the fastening portions 24 and 25 of the arc-shaped joint segment 20. Is located to be.

Next, the arc-shaped joint segment 20 and the arc-shaped joint segment 20a are integrally connected by ordinary mounting means 10 such as a bolt and nut shown in FIG.
Arc shaped joint segment 20 and arc shaped joint segment 20
When a is joined, as shown in FIG. 6 (a), an inlay connecting portion 21 provided on the arc-shaped joint segment 20 and an ingot connecting portion 21 provided on the arc-shaped joint segment 20a are fitted to each other to form an arc-shaped joint. Segment 20 and arc-shaped joint segment 20a
Are joined together.

At the stage when the arcuate joint segment 20 and the arcuate joint segment 20a are fitted, the arcuate joint segment 20 swings in the direction shown by the arrow in FIG. Swings in the direction opposite to the arrow.

When the arcuate joint segment 20 and the arcuate joint segment 20a are joined, the arcuate joint segment 20, as shown in FIG.
Is pressed against the pipe 4 in the direction of the pipe end indicated by an arrow by contacting the side wall 3a near the pipe end of the circumferential groove 3 of the pipe 4, and the arc-shaped ridge 27 of the fastening portion 24 is The pipe 4 is pressed in the direction opposite to the pipe end indicated by an arrow by contacting the side wall 3b far from the pipe end of the circumferential groove 3 of 4. At the same time, the arc-shaped ridge 28 of the tightening portion 25 abuts on the side wall 3b far from the pipe end of the circumferential groove 3 of the pipe 5, and presses the pipe 5 in the direction opposite to the pipe end indicated by the arrow. The arc-shaped ridge 29 abuts on the side wall 3a near the pipe end of the circumferential groove 3 of the pipe 5 and presses the pipe 5 in the pipe end direction indicated by the arrow.

The arcuate joint segment 20a moves in the direction opposite to the arcuate joint segment 20, and in the arcuate joint segment 20a, the arc-shaped projections 26a, 27a and the tightening portions 25a provided on the tightening portion 24a. Are provided symmetrically with the arc-shaped protrusions 26, 27 provided on the fastening portion 24 of the arc-shaped joint segment 20 and the arc-shaped protrusions 28, 29 provided on the fastening portion 25. Acts similarly.

The arc-shaped ridge 26 and the arc-shaped ridge 27 provided on the fastening portion 24 of the arc-shaped joint segment 20 and the arc-shaped ridge 26a and the arc-shaped projection provided on the fastening portion 24a of the arc-shaped joint segment 20a. The strips 27a are respectively connected to the joint surfaces 30.
From about to an angle position of about 45 degrees.

Assuming that the cross section of the tube is a ring as shown in FIG. 7, the ring 30 is supported at four points a, b, c, and d spaced 45 degrees apart in the circumferential direction. That is, a and c press the ring 30 from above, and b and d press the ring 30 from below. Therefore, the ring 30 is uniformly supported at an angle position of 45 degrees with respect to the XX line passing through the center o and the YY line orthogonal to the XX line, and the tube will bend in any direction. Even if a,
The four points b, c and d are equally received, and the pipe is securely fixed.

As described above, the housing type pipe joint presses the bottom surfaces and the side walls of the circumferential grooves 3, 3 provided at the ends of the pair of tubes 4, 5 by the tightening portions. The ends of the pair of pipes 4 and 5 are securely fixed, and the ends of the pair of pipes 4 and 5 do not expand, contract, or bend in the axial direction at the joint portion. Can also be prevented from being twisted.

In the above embodiment, the housing-type pipe joint presses the bottom surface and the side wall of the circumferential groove provided at the end of the pipe with the tightening portion. The outer peripheral surface and the side wall may be pressed. By pressing the outer peripheral surface and the side wall of the pipe with the tightening portion, the distance between the pipe and the bottom surface of the space 23 can be set to be constant regardless of the depth of the circumferential groove provided at the end of the pipe. Can be fixed at a fixed amount.

FIGS. 8 and 9 show an arc-shaped joint segment 120 of a second embodiment of a housing type pipe joint according to the present invention. Since the arc-shaped joint segment 120 and the arc-shaped joint segment 120a have the same configuration, only one arc-shaped joint segment 120 will be described.

The arc-shaped joint segment 120 is shown in FIG.
As compared with the arcuate joint segment 20 shown in FIG. 2, the configuration of the fastening portion is different, and the other portions have the same configuration.

The arc-shaped joint segment 120 is shown in FIG.
As shown in FIG. 10, one side of the space 123 has a fastening portion 124A that extends in an arc in the radial direction to a position approximately 45 degrees from one of the joining surfaces 130A, and the other side of the space 123 has the other joining portion. A tightening portion 124B extending in a circular arc radially inward from the surface 130B to a position approximately 45 degrees from the surface 130B, and a circular arc radially inward to a position approximately 45 degrees from one joint surface 130A on the other side of the space 123 on the other side. The extending fastening portion 125A and the space 1
23 has a fastening portion 125B extending in an arc shape inward in the radial direction to a position about 45 degrees from the other joining surface 130B.

The tightening portion 124A has an engaging surface 126 protruding inward from an inner surface facing the space 123 and pressing against a side wall 3a near the tube end of the circumferential groove 3 of one tube 5.
The fastening portion 124 </ b> B protrudes outward on the outer surface on the opposite side to the space 123 and is located on the side wall 3 far from the tube end of the circumferential groove 3 of one tube 5.
b. Tightening part 125A
Has an engaging surface 128 that protrudes outward on the outer surface opposite to the space 123 and presses against the side wall 3 b far from the end of the circumferential groove 3 of the other tube 4. The fastening portion 125 </ b> B has an engagement surface 129 that protrudes inward from an inner surface facing the space 123 and presses against the side wall 3 a near the tube end of the circumferential groove 3 of the other tube 4.

As shown in FIG. 8, each of the above-mentioned seal connecting portions 121 has a convex surface 140 having a rounded inner corner on the fitting end side of the convex engaging portion 122a. As a result, the arc-shaped joint segment 120 and the arc-shaped joint segment 120a are smoothly joined to each other without the protruding engagement portions 122a strongly contacting each other.

The width W of the arc-shaped joint segment 120
Is smaller than the distance L between the side walls 3b, 3b far from the pipe ends of the circumferential grooves 3, 3 of the two pipes 4, 5 when the two pipes 4, 5 abut on their end faces, as shown in FIG. Is set. This means that the arc-shaped joint segments 120, 120a can be easily fitted into the two tubes 4, 5 without pushing up the upper tube 5 when the two tubes 4, 5 are piped in the vertical direction.

Next, a procedure for assembling the housing type pipe joint into two pipes 4, 5 arranged in the vertical direction will be described. First, one of the tubes 4 is arranged vertically, and an elastic ring (FIG. 6) is attached to the end of the tube 4. Next, the other tube 5 is arranged above the tube 4, the tube 5 is moved in the direction of the tube 4, and the tube end of the tube 5 is fitted into the elastic ring attached to the tube 4. For convenience of explanation, the elastic ring is omitted in FIG.

The two pipes 4 and 5 are arranged with the pipe ends facing each other, so that the circumferential grooves 3 of the two pipes 4 and 5 are formed.
An interval L is formed between the side walls 3b, 3b far from the end of the tube. This interval L is the width W of the arc-shaped joint segment 120.
It is set wider.

Next, the arc-shaped joint segments 120, 1
As shown in FIG. 12, 20a is opposed to each other so as to sandwich the ends of the two tubes 4 and 5. The arc-shaped joint segment 120 and the arc-shaped joint segment 120a have the same shape, and the concave engaging portion 122b and the convex engaging portion 122a of one of the ink-jet connecting portions 121 are connected to the convex engaging portion of the other ink-joint connecting portion 121. 122a and the concave engagement portion 122b. Arc joint segment 120 and arc joint segment 120
"a" is integrally connected by ordinary bolt and nut mounting means 10 (FIG. 6).

The arc-shaped joint segment 120 and the arc-shaped joint segment 120a are in a state in which the convex engaging portions 122a of the seal connecting portion 21 are in light contact with each other at the stage of fitting shown in FIG. The grooves 4 are inclined and disposed between the spaces L between the circumferential grooves 3 and 3. Next, the arc-shaped joint segment 120 and the arc-shaped joint segment 120a are
When tightened by the mounting means 10 in the direction indicated by the arrow in FIG. 12, the arcuate joint segment 120 and the arcuate joint segment 120a slide along the surfaces of the two tubes 4 and 5, and the convex shape of the arcuate joint segment 120 Engagement part 122a
And the concave engaging portion 122b are arc-shaped joint segments 120a.
Are fitted into the concave engaging portion 122b and the convex engaging portion 122a.

As shown in FIG. 12, the arcuate joint segment 120 is rotated in the direction of arrow A by screwing the bolt and nut mounting means 10, and the arcuate joint segment 120a is rotated.
Is rotated in the direction of arrow B by screwing the bolt and nut mounting means 10 as shown in FIG. In this case, an outwardly protruding engagement surface 127 provided on the fastening portion 124B and an outwardly protruding engagement surface 128 provided on the fastening portion 125A
Is located on the side closer to the convex engaging portion 122a of the ink coupling portion 121, and thus rotates in the same direction as the screw tightening direction of the bolt and nut mounting means 10.

At the stage where the joints of the arc-shaped joint segment 120 and the arc-shaped joint segment 120a are completed, as shown in FIG. The protruding engagement portions 122a of the stamped joint portion 121 provided on the arc-shaped joint segment 120a are pressed against each other by side surfaces, and are indicated by arrows on the engagement surface 127 of the fastening portion 124B and the engagement surface 128 of the fastening portion 125A. Directional force acts, whereby the upper tube 5 moves away from the lower tube 4, and the distance between the side walls 3a, 3a of the circumferential grooves 3, 3 of the two tubes 4, 5 is L. To L '. Therefore, the engagement surface 127 of the fastening portion 124B and the engagement surface 128 of the fastening portion 125A are
Since the side walls 3a, 3a are pressed against each other, the arcuate joint segment 120 and the arcuate joint segment 120a do not shift laterally even when an external force for moving the tube is applied.
Therefore, the fixing force against the stiffness is strengthened.

[0038]

As described above, according to the present invention, the pipe and the pipe are securely fixed by pressing the ridge or the engagement surface provided on the side face of the fastening portion against the side wall of the circumferential groove of the pipe. In addition, even if there is a manufacturing error in the arc-shaped joint segment, the relative movement and rotation of the pipe can be prevented without being affected by the manufacturing error.

[Brief description of the drawings]

FIG. 1 is a perspective view of an arc-shaped joint segment of a housing type pipe joint according to the present invention.

FIG. 2 is an exploded view showing a part of the arc-shaped joint segment shown in FIG.

FIG. 3 is a front view of a housing-type pipe joint showing a state where a pair of arc-shaped joint segments are joined together by an inro.

FIG. 4 is a side view of the housing type pipe joint shown in FIG. 3;

FIG. 5 is a view showing a stage before tightening of the housing type pipe joint according to the present invention.

FIG. 6 shows a stage after tightening of the housing type pipe joint according to the present invention.

FIG. 7 is a diagram showing an action point on a pipe of the housing type pipe joint according to the present invention.

FIG. 8 is a perspective view of an arc-shaped joint segment of a housing-type pipe joint according to a second embodiment of the present invention as viewed from one side.

FIG. 9 is a perspective view of the arc-shaped joint segment of the housing-type pipe joint according to the second embodiment of the present invention, as viewed from the other side.

FIG. 10 is an exploded view of a second embodiment of a housing type pipe joint according to the present invention, showing a part of an arcuate joint segment cut away.

FIG. 11 is a view showing a relationship between a housing type pipe joint and circumferential grooves provided in a pair of pipes.

FIG. 12 is a view showing a stage before tightening of the housing type pipe joint according to the second embodiment of the present invention.

FIG. 13 is a view showing a stage after tightening of the housing type pipe joint according to the second embodiment of the present invention.

FIG. 14 is an exploded perspective view of a conventional housing type pipe joint.

[Explanation of symbols]

 Reference Signs List 3 circumferential groove 3a, 3b side wall 4 pipe 5 pipe 20 arcuate joint segment 21 seal connecting part 22a convex engaging part 22b concave engaging part 24 fastening part 25 fastening part 26 ridge 27 ridge 28 ridge 29 Protrusions 124A, 124B Tightening portion 125A, 125B Tightening portion 126 Engagement surface 127 Engagement surface 128 Engagement surface 129 Engagement surface

Claims (5)

[Claims] A space for accommodating a pair of arc-shaped joint segments, ends of a pair of tubes formed in each arc-shaped joint segment and an elastic ring, and a space provided on both sides of the space for each of the tubes. A pair of tightening portions that engage with the circumferential groove, an inked connecting portion provided on both end surfaces of the arc-shaped joint segment, and mounting means for connecting the pair of arc-shaped joint segments to each other; The inlay connecting portion has a convex engaging portion and a concave engaging portion having the same width, and is arranged such that the convex engaging portion of one ingot connecting portion and the concave engaging portion of the other ingot connecting portion face each other. One of the fastening portions extends continuously from the joining surface to an angle position of about 45 degrees adjacent to the convex engagement portion of the seal connecting portion provided on one end surface, and the circumferential groove of one of the tubes is provided. Ridge that abuts the side wall far from the end of the tube and the concave engagement portion of the inking connection portion provided on the other end surface Adjacent to the joining surface, a ridge extending continuously from the joining surface to an angle position of about 45 ° and having a contact with a side wall near a pipe end of a circumferential groove of one of the pipes, and the other of the tightening portions is provided on one end face. The ridge and the other end face which extend continuously from the joint surface to an angle position of about 45 degrees adjacent to the concave engaging portion of the provided ingot connecting portion and which abut on the side wall near the pipe end of the circumferential groove of the other pipe. About 45 degrees from the joint surface adjacent to the convex engagement portion of the provided
A housing-type pipe joint having a ridge extending continuously to a degree angle position and abutting against a side wall remote from a pipe end of a circumferential groove of the other pipe. 2. The housing type pipe joint according to claim 1, wherein the ridge provided on the fastening portion comes into surface contact with a side wall of a circumferential groove formed in the pipe. 3. A space for accommodating a pair of arcuate joint segments, ends of a pair of tubes formed in each arcuate joint segment and an elastic ring, and a space provided on both sides of said space for each tube. A pair of tightening portions that engage with the circumferential groove, an inked connecting portion provided on both end surfaces of the arc-shaped joint segment, and mounting means for connecting the pair of arc-shaped joint segments to each other; The inlay connecting portion has a convex engaging portion and a concave engaging portion having the same width, and is arranged such that the convex engaging portion of one ingot connecting portion and the concave engaging portion of the other ingot connecting portion face each other. One of the tightening portions extends continuously from the joining surface to an angle position of about 45 degrees adjacent to the convex engaging portion of the seal connecting portion provided on one end surface, and the outer surface of the one joining tube is Tightening part that contacts the side wall far from the pipe end of the circumferential groove A clamping portion extending continuously from the joint surface to an angular position of about 45 degrees adjacent to the concave engagement portion of the portion and having an inner surface abutting against a side wall near a tube end of a circumferential groove of one tube; The other of the fastening portions extends continuously from the joining surface to an angle position of about 45 degrees adjacent to the concave engaging portion of the seal connecting portion provided on one end surface, and the inner surface of the other surface has the circumferential groove of the other tube. The outer surface of the other tube extends continuously from the joint surface to an angle position of about 45 degrees adjacent to the fastening portion abutting on the side wall near the tube end and the convex engagement portion of the seal connecting portion provided on the other end surface. A housing-type pipe joint having a tightening portion that abuts on a side wall far from a pipe end of a circumferential groove of the housing. 4. The housing type pipe according to claim 1, wherein the arc-shaped joint segment has a width smaller than a length connecting side walls far from the pipe ends of the circumferential grooves of the two pipes in contact. Fittings. 5. The housing-type pipe joint according to claim 3, wherein the convex engagement portion of the intaglio coupling portion has a round convex surface at an inner corner of the fitting end.