JP2021188622A - Connection device for resin pipe - Google Patents

Abstract

To provide a connection device for a resin pipe capable of determining sealing quality.SOLUTION: A connection device 5 comprises: an upper split body 10; a lower split body 20; hinge means H for rotatably connecting one ends of the split bodies; and fastening means for fastening the other ends of the split bodies so as for them to be closer to each other. When the split bodies are fastened, tapered faces of fitting grooves formed on inner peripheral faces of the split bodies press tapered faces of flange parts of resin pipes, and thereby, butting faces of the flange parts are butted to each other. A seal ring housed in a housing groove of the butting face comes into close contact with the butting face, and thereby, a space between the butting faces is sealed. On a side face facing a pipe axial direction of the other ends of the split bodies, check holes 10h and 20h are formed, and depending on whether protrusions 42 and 43 of a construction management jig 40 can be inserted into the check holes, sealing quality is determined.SELECTED DRAWING: Figure 8

Description

The present invention relates to a device for connecting two resin pipes having a flange portion at one end.

When it is required to connect resin pipes to each other without fusion work at the construction site, the flange part is attached to the end by butt fusion of a short pipe with a flange part to the resin pipe body at the factory. Manufacture a resin tube to have. The flange portion has a butt surface orthogonal to the tube axis of the resin tube on the tip side and a tapered surface on the opposite side. At the construction site, a connecting device is used to connect the two resin pipes so that the butted surfaces of the flanges are butted against each other.

The connecting device shown in Patent Document 1 is a fastening in which a pair of upper and lower split bodies, a hinge means for rotatably connecting one end of the pair of split bodies, and the other ends of the pair of split bodies are fastened so as to be close to each other. It has the means. Each of the pair of divided bodies has a fitting groove extending in a semicircle on the inner circumference. Tapered surfaces having a taper angle equal to the tapered surface of the flange portion are formed on both sides of the fitting groove in the pipe axial direction.

The process of connecting the resin tube by the connecting device of Patent Document 1 will be briefly described. The pair of split bodies are opened, and the flanges of the two resin tubes are placed in the fitting grooves of the lower split body. Next, the upper split body is rotated in the closing direction to loosely fit the flange portions of the two resin tubes into the fitting groove of the upper split body. Finally, the other ends of the pair of split bodies are fastened so as to be close to each other by the fastening means. As a result, the tightening force brings the flange portions of the two resin pipes closer to each other through the tapered surfaces on both sides of the fitting groove of the pair of split bodies and the tapered surfaces of the flange portions of the two resin pipes in the axial direction. Converted to force. As a result, the two resin pipes are connected in a state where the butt surfaces of the flange portions are abutted.

An annular accommodating groove is formed on one of the abutting surfaces of the two resin tubes facing each other, and a seal ring is fitted in the accommodating groove. This seal ring comes into close contact with the other butt surface when the pair of split bodies are fastened by the fastening means, thereby sealing between the butt surfaces of the two resin tubes.

Japanese Patent No. 5740123

In the connection device of Patent Document 1, when the connection of the resin pipe is completed by tightening the fastening means with the seal ring detached from the accommodating groove, water leakage occurs from the resin pipe joint due to the sealing failure. There was no easy way to determine the quality of the product.

In order to solve the above problems, the present invention relates to a connecting device for connecting two resin pipes having an annular flange portion having a butt surface and a tapered surface formed at one end thereof.
A flange means for rotatably connecting the first and second divided bodies and one end of the first and second divided bodies along a plane orthogonal to the tube axis of the resin tube, and the first and second divided bodies. The first and second divided bodies are provided with a fastening means for tightening the other ends of the divided bodies so as to be close to each other, and the first and second divided bodies have a fitting groove extending in an arc shape on the inner peripheral surface, and the fitting groove is the fitting groove thereof. It has tapered surfaces on both sides, and when tightened by the fastening means, the tapered surface of the fitting groove presses the tapered surface of the flange portion of the two resin pipes, whereby the first and second divisions are performed. As the facing surfaces of the other ends of the body approach each other, the abutting surfaces of the flanges of the two resin tubes are abutted against each other, and the seal is accommodated in the annular accommodating groove of the abutting surface of one resin tube. The ring is in close contact with the butt surface of the other resin tube so that the butt surface of the two resin tubes is sealed.
At least one first confirmation hole and at least one second confirmation hole are formed on the side surfaces of the first division and the other end of the second division, respectively.
Further, a construction management jig is provided, and the construction management jig is connected to the first and second confirmation holes when two resin pipes are connected in a state where the seal ring is normally accommodated in the accommodating groove. It is characterized by having a plurality of matching protrusions.

According to the above configuration, by confirming whether or not the protrusion of the construction management jig matches the first and second confirmation holes, the seal ring is normally accommodated in the accommodating groove and the seal is in a good condition. , It is possible to easily determine whether the seal ring is disengaged from the accommodating groove and a seal defect has occurred.

Preferably, the first and second confirmation holes are formed on the side surface of the resin tube facing the tube axis direction at the other end of the first and second divided bodies.
According to the above configuration, it is possible to determine the quality of the seal by the construction management jig from the pipe axis direction.

Preferably, the first and second confirmation holes are far from the fastening position of the first and second divided bodies by the fastening means, and the facing surface and the inner peripheral surface of the first and second divided bodies intersect with each other. It is formed at a position close to the corner.
According to the above configuration, it is possible to accurately determine a good seal by reducing the influence of the fastening force of the fastening means.
More preferably, the distance of the first and second confirmation holes from the inner peripheral surface of the first and second divided bodies is 50% or less of the radial thickness of the first and second divided bodies.

Preferably, the first and second confirmation holes are formed one by one in the first and second divided bodies, and the construction management jig has an elongated grip portion at both ends of the grip portion. The protrusion is formed. According to the above configuration, the construction management jig can be made a simple configuration.
Preferably, the first and second divided bodies are formed of a resin containing glass fiber.

According to the present invention, it is possible to easily determine whether the seal is good or bad at the resin pipe joint.

It is a perspective view which shows the connection device of the resin tube which concerns on one Embodiment of this invention in the state which connection of a resin tube is completed, and shows the connection device and a part of a resin tube cut out. It is a perspective view which shows the upper and lower pair of divisions of the said connection device in a separated state, and each of the pair of divisions is cut in half in the width direction, and the viewing direction is different. It is a cross-sectional view which shows the connection process of the resin tube by the connection device in order, (A) shows the state in the middle of the connection process, (B) shows the state which the connection process is completed. It is a vertical sectional view which shows the connection process of the resin tube by the connection device in order, (A) shows the state in the middle of a connection process, (B) shows the state which the connection process is completed. It is a perspective view which shows the said connection apparatus when the connection of a resin tube is completed with the seal ring set normally, and the resin tube and the fastening means are omitted. It is a front view of the connection device of FIG. (A) is a perspective view of a construction management jig, and (B) is a front view. FIG. 6 is a view corresponding to FIG. 6 showing a state in which a construction management jig is attached to a pair of divided bodies.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Configuration of Resin Tubes First, the resin tubes 1 and 2 to be connected will be described with reference to FIGS. 1 and 4. The resin tubes 1 and 2 are made of a resin such as polyethylene, and have annular flange portions 1a and 2a at one end thereof. The resin pipes 1 and 2 are obtained by butt fusion of the short pipe having the flange portions 1a and 2a and the long resin pipe main body. The tip surfaces of the flange portions 1a and 2a are butt surfaces 1x and 2x orthogonal to the tube axis L, and the opposite surfaces are tapered surfaces 1y and 2y. An annular accommodating groove 1z is formed on the abutting surface 1x of the flange portion 1a of the resin tube 1, and the seal ring 3 is fitted in the accommodating groove 1z.

Incores 4 having a short tubular shape are arranged on the inner circumferences of one ends of the resin tubes 1 and 2. The in-core 4 is made of stainless steel such as SUS304, and an annular collar 4a projecting radially and outward is formed at one end thereof. By engaging the flange 4a with the annular recesses 1b and 2b formed on the inner circumference of the tips of the resin pipes 1 and 2, the incore 4 is connected to the resin pipes 1 and 2 in a state where the movement in the axial direction is restricted. It is installed. Since the flange 4a is housed in the recesses 1b and 2b, it does not hinder the butting of the flange portions 1a and 2a described later.

Basic Configuration of Connection Device Next, the basic configuration of the connection device 5 for connecting the resin pipes 1 and 2 will be described with reference to FIGS. 1 to 4. The connecting device 5 includes a pair of upper and lower divided bodies, that is, an upper divided body 10 (first divided body) and a lower divided body 20 (second divided body).
The divided bodies 10 and 20 are made of, for example, glass fiber reinforced resin (nylon, polypropylene, polyacetal, etc.) and have main body portions 11 and 21 having a substantially semi-cylindrical shape, respectively. The inner diameters of the main bodies 11 and 21 are substantially equal to the outer diameters of the resin pipes 1 and 2.
Both side surfaces of the main bodies 11 and 21 of the divided bodies 10 and 20 in the tube axis L direction are orthogonal to the tube axis L.

The surfaces of both ends of the main bodies 11 and 21 of the divided bodies 10 and 20 face each other in a state where the resin pipes 1 and 2 are connected to each other as described later. Hereinafter, this surface is referred to as an end facing surface. The main bodies 11 and 21 have shorter circumferential dimensions than a perfect semi-cylinder. That is, the end facing surfaces 11a and 11b of the main body 11 of the upper split body 10 are slightly recessed from the plane passing through the radial center of the inner circumference of the main body 11 and are parallel to this plane. Similarly, the end facing surfaces 21a and 21b of the main body 21 of the lower split body 20 are slightly recessed from the plane passing through the radial center of the inner circumference of the main body 21 and are parallel to this plane. ..

Fitting grooves 12 and 22 extending in a substantially semicircle in the circumferential direction are formed on the inner peripheral surfaces of the main bodies 11 and 21 of the divided bodies 10 and 20. Tapered surfaces 12a and 22a are formed on both sides of the fitting grooves 12 and 22 in the direction of the tube axis. The taper angles of the tapered surfaces 12a and 22a are equal to the tapered surfaces 1y and 2y of the flange portions 1a and 2a of the resin pipes 1 and 2. The cross-sectional shape of the fitting grooves 12 and 22 is substantially the same as the cross-sectional shape of the flange portions 1a and 2a in a state where the butt surfaces 1x and 2x of the flange portions 1a and 2a are in contact with each other, as will be described later.
It should be noted that a meat stealing recess extending in the circumferential direction (only the meat stealing recess 13 of the main body 11 is shown) is formed on the outer periphery of the main body portions 11 and 21.

An engaging portion 15 is provided integrally with the main body portion 11 at one end of the main body portion 11 of the upper split body 10. The engaging portion 15 has a protruding portion 15a that protrudes radially outward from one end of the main body portion 11 and a downward portion (on the lower split body 20) that is orthogonal to the protruding portion 15a and exceeds the end facing surface 11a. It has an extension 15b that extends (towards).

An engaging hole 16 is formed in the engaging portion 15 of the upper split body 10. The engaging hole 16 has a main hole portion 16a formed in the extending portion 15b and penetrating in the radial direction, and a relief recess 16b formed in the protruding portion 15a and connected to the main hole portion 16a.
The main hole portion 16a has a substantially rectangular shape and occupies between the lower surface 16x of the engagement hole 16 and the extension surface of the end facing surface 11a of the main body portion 11. The lower surface 16x is provided as a load receiving surface as described later.
The relief recess 16b is located above the extension surface of the end facing surface 11a (opposite side of the lower split body 20), and the radial outer side is open. The lateral dimension of the relief recess 16b is equal to the lateral dimension of the main hole portion 16a.

At one end of the main body 21 of the lower split body 20, an engaging protrusion 25 extending radially outward is formed integrally with the main body 21. The cross-sectional shape of the engaging protrusion 25 is rectangular, and the upper surface thereof is flush with the end facing surface 21a of the main body 21. The vertical and horizontal dimensions of the engaging protrusion 25 are slightly shorter than the vertical and horizontal dimensions of the main hole portion 16a of the engaging hole 16 of the upper split body 10.
As will be described later, the hinge means H is configured by inserting the engaging protrusion 25 of the lower splitting body 20 into the engaging hole 16 of the upper splitting body 10. The hinge means H connects the upper split body 10 to the lower split body 20 so as to be relatively rotatable along a plane orthogonal to the pipe axis L of the resin pipes 1 and 2.

At the other ends of the main bodies 11 and 21 of the divided bodies 10 and 20, receiving portions 18 and 28 projecting outward in the radial direction are formed integrally with the main bodies 11 and 21, respectively. The lower surface of the receiving portion 18 is flush with the end facing surface 11b of the main body 11, and the upper surface of the receiving portion 28 is flush with the end facing surface 21b of the main body 21. Through holes 18a and 28a are formed in the receiving portions 18 and 28. On the lower surface of the receiving portion 28, a pair of anti-rotation convex portions 29 located on both sides of the through hole 28a are formed.
As shown in FIG. 3B, the fastening means 30 for fastening the receiving portions 18 and 28 has a bolt 31 and a nut 32.

Connection Step of Resin Tube by Connection Device The connection step of the resin pipes 1 and 2 by the connection device 5 will be described. As shown in FIGS. 3A and 4A, the seal ring 3 in which the flange portions 1a and 2a of the resin pipes 1 and 2 are first housed in the storage groove 1z of the butt surface 1x is the resin pipe 2. Place it on the lower split body 20 in a state where it is lightly in contact with the butt surface 2x. The flange portions 1a and 2a are aligned with the fitting groove 22, and a part thereof is accommodated in the fitting groove 22.

Next, the upper split body 10 is brought closer to the lower split body 20 from the lateral direction in an inclined posture, and the engaging protrusion 25 is inserted into the engaging hole 16 of the engaging portion 15. At this time, a part of the tip portion of the engaging protrusion 25 is disengaged from the main hole portion 16a of the engaging hole 16, but can be received by the relief recess 16b. Therefore, the upper split body 10 can be deeply covered with the flange portions 1a and 2a without the engaging protrusion 25 interfering with the engaging portion 15.

Specifically, at the initial stage where the engaging protrusion 25 is inserted into the engaging hole 16 to form the hinge means H, the deepest end E of the fitting groove 12 of the upper split body 10 (the hinge means H). The opposite end) extends beyond the circumferential half of the upper half of the flanges 1a, 2a. That is, the end E of the upper split body 10 is located on the left side (opposite side of the hinge means H) from the vertical surface V passing through the center of the flange portions 1a and 2a in FIG. 3A.

Next, by rotating the upper split body 10 around the fulcrum F so as to approach the lower split body 20, the receiving portion 18 of the upper split body 10 approaches and faces the receiving portion 28 of the lower split body 20. .. In this state, a part of the flange portions 1a and 2a is also accommodated in the fitting groove 12 of the upper split body 10. Further, the engaging protrusion 25 of the lower split body 20 fits within the main hole portion 16a of the engaging hole 16 of the upper split body 10.

Next, with the nut 32 rotatably fitted between the pair of anti-rotation convex portions 29, the bolt 31 is passed through the receiving portions 18 and 28 of the divided bodies 10 and 20 as shown in FIG. 3 (B). Pass it through the holes 18a and 28a, screw it into the nut 32, and turn it in the tightening direction. As a result, the lower split body 20 and the upper split body 10 are tightened with the flange portions 1a and 2a of the resin pipes 1 and 2 sandwiched. This tightening force is converted into an axial force that brings the flange portions 1a and 2a closer to each other by the action of the tapered surfaces 12a and 22a on both sides of the fitting grooves 12 and 22 and the tapered surfaces 1y and 2y of the flange portions 1a and 2a. To. As a result, as shown in FIG. 4B, the abutting surfaces 1x and 2x of the flange portions 1a and 2a are abutted against each other, and the seal ring 3 accommodated in the accommodating groove 1z of one abutting surface 1x undergoes elastic deformation. Along with this, it comes into close contact with the other butt surface 2x, whereby the butt surface 1x and 2x are sealed. In this way, the connection process is completed.

By tightening the bolt 31, the receiving portions 18 and 28 approach each other, and in the hinge means H, the engaging projection 25 strongly hits the load receiving surface 16x of the engaging hole 16 of the engaging portion 15.

Regarding the feature portion of the present invention As described above, when the resin tubes 1 and 2 are connected by the connecting device 5 in a state where the seal ring 3 is normally accommodated in the accommodating groove 1z, the butt surface of the resin tubes 1 and 2 is connected. The space between 1x and 2x is well sealed and no water leakage occurs.
However, when the resin pipes 1 and 2 are connected in a state where a part of the seal ring 3 is separated from the accommodating groove 1z, a sealing defect occurs between the butt surfaces 1x and 2x of the resin pipes 1 and 2, and water leakage occurs. ..

In the present invention, in order to determine whether or not the seal ring 3 is normally set, attention is paid to the difference in the size of the gap between the end facing surfaces 11b and 21b of the divided bodies 10 and 20.
More specifically, when the seal ring 3 is normally set, as shown in FIGS. 3 (B), 5 and 6, between the end facing surfaces 11b and 21b on the fastening side of the divided bodies 11 and 12. The gap is small. On the other hand, when the seal ring 3 is out of the accommodating groove 1z, the seal ring 3 is interposed between the butt surfaces 1x and 2x of the resin pipes 1 and 2, so that the butt surfaces 1x and 2x are not abutted. As a result, the divided bodies 10 and 20 are restricted from approaching each other, and the gap between the end facing surfaces 11b and 21b becomes large.

As shown in FIGS. 5 and 6, the connecting device 5 of the present invention is a divided body 10 as a means for determining whether or not the seal ring 3 is normally set (that is, whether or not the seal is good). , 20 are provided with confirmation holes 10h and 20h formed on one side surface in the pipe axis direction at the end of the main body portions 11 and 21 on the fastening side, and the construction management jig 40 shown in FIG. 7.

It is preferable that the confirmation holes 10h and 20h are formed in the vicinity of the corner portion where the inner peripheral surfaces of the divided bodies 10 and 20 and the end facing surfaces 11b and 21b intersect with each other, far from the fastening portion by the fastening means 30. More specifically, the confirmation holes 10h and 20h are formed at a distance of 50% or less of the thickness Ta of the main bodies 11 and 21 from the inner peripheral surfaces of the main bodies 11 and 21 of the divided bodies 10 and 20. preferable. Further, the confirmation holes 10h and 20h are preferably formed at a distance of 70% or less of the thickness Tb of the receiving portions 18 and 28 from the end facing surfaces 11b and 21b. Further, the depth of the confirmation holes 10h and 20h is preferably 20 mm or less.

The construction management jig 40 has an elongated plate-shaped grip portion 41 and protrusions 42 and 43 formed at both ends of the grip portion 41. In the present embodiment, the protrusions 42 and 43 have a circular cross section, and the tips are hemispherical or tapered. The diameters of the protrusions 42 and 43 are equal to or slightly smaller than the diameters of the confirmation holes 10h and 20h.

The distance Da between the protrusions 42 and 43 (see FIG. 7B) is when the resin pipes 1 and 2 are connected by the connecting device 5 in a normal set state in which the seal ring 3 is contained in the accommodating groove 1z. It is equal to the distance Db (see FIG. 6) between the confirmation holes 10h and 20h. More specifically, in the present embodiment, when the seal ring 3 is connected in a normally set state, the gap dimension Dx between the end facing surfaces 11b and 21b is substantially constant, for example, 1.7 mm. The distance Db between the confirmation holes 10h and 20h is obtained by adding the distance between the end facing surface 11b and the confirmation hole 10h and the distance between the end facing surface 21b and the confirmation hole 20h to this distance Dx.

After the fastening by the fastening means 30 is completed, as shown in FIG. 8, the grip portion 41 of the construction management jig 40 is grasped, and the protrusions 42 and 43 are inserted into the confirmation holes 10h and 20h. When this insertion is successful, the resin pipes 1 and 2 are connected by the connecting device 5 with the seal ring 3 normally set in the accommodating groove 1z, and the butt surfaces 1x of the resin pipes 1 and 2 are connected. It can be determined that the seal between 2x is good.

When the seal ring 3 is out of the accommodation groove 1z, the gap between the end facing surfaces 11b and 21b becomes large after the fastening by the fastening means 30 is completed. For example, the seal ring 3 is normally set. In this embodiment, it will be 5.8 mm or more, which is three times or more the case where it is used. Therefore, the distance between the confirmation holes 10h and 20h becomes larger than in the normal state, and the protrusions 42 and 43 of the construction management jig 40 cannot be inserted into the confirmation holes 10h and 20h at the same time. Thereby, it can be determined that the seal between the butt surfaces 1x and 2x of the resin tubes 1 and 2 is defective.

Since the confirmation holes 10h and 20h are formed near the inner peripheral surfaces of the divided bodies 10 and 20, the amount of change in the confirmation holes 10h and 20h due to the influence of the tightening force can be suppressed to be small by the tightening means 30. , The confirmation work by the construction management jig 40 can be performed accurately.
The construction management jig 40 may be removed from the divided bodies 10 and 20 after determining whether the seal is good or bad, or may be attached to the divided bodies 10 and 20 when it is determined that the seal is good.

The present invention is not limited to the above embodiment, and various modifications can be made as long as it does not contradict the gist thereof.
An allowable range may be set for the gap dimension between the end facing surfaces 11b and 21b when the connection is completed with the seal ring 3 normally set. In this case, in the above embodiment, the protrusions 42 and 43 of the construction management jig 40 are determined to have a good seal when only the hemispherical or tapered tip portion is inserted into the confirmation holes 10h and 20h even if it cannot be inserted deeply. You may. Further, the diameters of the confirmation holes 10h and 20h may be made larger than the protrusions 42 and 43 of the construction management jig 40, and the confirmation holes 10h and 20h may be elongated holes extending in the opposite directions of the end facing surfaces 11a and 21b. The tolerance may be set.

In the above embodiment, the quality of the seal is determined by the construction management jig 40 after the tightening by the tightening means 30 is completed, but it may be executed before the tightening process or during the tightening process.
There may be a plurality of confirmation holes 10h and 20h, respectively.

The present invention can be applied to an apparatus for connecting a resin tube having a flange portion at an end portion.

1, 2 Resin pipes 1a, 2a Flange portion 1x, 2x Butt surface 1y, 2y Tapered surface 1z Accommodating groove 3 Seal ring 5 Connecting device 10 Upper split body (first split body)
10h confirmation hole (1st confirmation hole)
20 Lower split body (second split body)
20h confirmation hole (second confirmation hole)
11b, 21b End facing surfaces 12, 22 Fitting grooves 12a, 22a Tapered surface 30 Fastening means 40 Construction management jig 41 Grips 42, 43 Protrusions H Hinge means

Claims (6)

In a connecting device for connecting two resin pipes having an annular flange portion having a butt surface and a tapered surface formed at one end thereof.
A hinge means for rotatably connecting the first and second divided bodies and one end of the first and second divided bodies along a plane orthogonal to the tube axis of the resin tube, and the first and second divided bodies. A fastening means for tightening the other ends of the split body so as to bring them closer to each other is provided.
The first and second divided bodies have a fitting groove extending in an arc shape on the inner peripheral surface thereof, and the fitting groove has tapered surfaces on both sides thereof, and the fitting groove has a fitting groove when tightened by the fastening means. By pressing the tapered surface of the flange portion of the two resin tubes, the tapered surfaces of the first and second divided bodies approach each other and the facing surfaces of the other ends of the first and second divided bodies approach each other, and the two resin tubes are used. The abutting surfaces of the flange portion of the above are abutted against each other, and the seal ring accommodated in the annular accommodating groove of the abutting surface of one resin tube is in close contact with the abutting surface of the other resin tube. The space between the butt surfaces of the resin tube is sealed.
At least one first confirmation hole and at least one second confirmation hole are formed on the side surfaces of the first division and the other end of the second division, respectively.
Further, a construction management jig is provided, and the construction management jig is connected to the first and second confirmation holes when two resin pipes are connected in a state where the seal ring is normally accommodated in the accommodating groove. A resin tube connecting device characterized by having a plurality of matching protrusions. The first and second confirmation holes according to claim 1, wherein the first and second confirmation holes are formed on a side surface of the resin tube facing the tube axis direction at the other end of the first and second divided bodies. Resin tube connection device. The first and second confirmation holes are far from the fastening position of the first and second divided bodies by the fastening means, and the corner portion where the facing surface and the inner peripheral surface of the first and second divided bodies intersect. The resin tube connecting device according to claim 2, wherein the resin tube is formed at a position close to the above. A claim characterized in that the distance of the first and second confirmation holes from the inner peripheral surface of the first and second divided bodies is 50% or less of the radial thickness of the first and second divided bodies. Item 3. The resin tube connecting device according to item 3. The first and second confirmation holes are formed one by one in the first and second divided bodies, and the construction management jig has an elongated grip portion, and the protrusions are provided at both ends of the grip portion. The resin tube connecting device according to any one of claims 1 to 4, wherein the resin tube is formed. The resin tube connecting device according to any one of claims 1 to 5, wherein the first and second divided bodies are formed of a resin containing glass fiber.

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