TW202300324A - Joint and method for connecting pipe materials - Google Patents

Abstract

A joint 20 includes: a joint main body 22 for connecting a plurality of pipe materials 10, the joint main body 22 has a hole 34 formed inside and a recess 26 into which a resin-made cylindrical pipe material 10 is inserted through an opening 26a; a cylindrical sleeve 40, disposed between the pipe material 10 and the joint main body 22, formed a groove portion 54 into which the pipe material 10 is inserted and an end face 58 to which an end face of the pipe material 10 inserted into the groove portion 54 abuts and contacts. The cylindrical sleeve 40 connects the joint main body 22 and the pipe material 10 by inserted into the hole 34 along the axial direction together with the pipe material 10, and by contacting the outer peripheral wall 50 and the end surface 48 to the recess 26.

Description

Connection methods of joints and pipes

The invention relates to a joint and a method for connecting pipe materials.

Japanese Patent Laying-Open No. 7-117133 (Patent Document 1) discloses a method for joining plastic pipes. It uses a joint embedded with a heating element made of thermoplastic resin containing magnetic powder on the inner surface, and inserts the joint into the plastic pipe. After fixing the joint at the end of the pipe, or against the outer peripheral surface of the plastic pipe from the side, use a heating device composed of a high-frequency generating device, an electrode core and an exciting coil to generate an alternating magnetic field of 1~400KHz, and by The heat of the magnetic powder is used for thermal welding.

In the joining method of plastic tubes described in the above-mentioned patent document 1, the plastic tube is inserted into the cylindrical joint and only the outer peripheral portion of the plastic tube and the inner peripheral portion of the joint are in contact with each other, so that the plastic tube and the joint are connected. Thermal welding. In this case, in order to confirm that the plastic tube is fully inserted into the joint during heat welding, the plastic tube inserted into the joint is peeled, which is the part inserted into the joint during heat welding. The peripheral portion is slightly cut off compared to the other peripheral portions. The peeled plastic tube has a step formed by the outer peripheral part of the part inserted into the joint and the other peripheral parts.

When the peeled plastic pipe is thermally welded to the joint described in Patent Document 1, the operator will confirm that the plastic pipe has been fully inserted into the joint by visually observing the step formed during the peeling process. In other words, when thermally welding the plastic pipe and the joint with only the outer peripheral portion of the plastic pipe in contact with the inner peripheral portion of the joint, the operator must perform peeling processing on the plastic pipe in advance.

The present disclosure is an invention made in view of the above-mentioned current situation, and its object is to provide a joint in which a plurality of pipes are connected in a state where the outer peripheral parts of the plural resin pipes are in contact with the inner peripheral part of the joint. Simplifies the connection work of multiple pipes.

The joint related to the first aspect of the present disclosure includes: a joint main body having a flow channel formed inside, and a first inserted portion into which a resin cylindrical pipe is inserted along the axial direction of the pipe, through which the pipe is inserted. The flow channel is used to connect a plurality of the pipes; and the cylindrical connecting portion is disposed between the pipes and the joint body, and has a second inserted portion that is inserted into the pipe along the axial direction and contacts the pipe. , and the abutted portion that abuts against the end face of the pipe inserted into the second inserted portion is inserted into the first inserted portion along the axial direction together with the pipe, so that the outer peripheral portion and the front end face in the insertion direction will be in contact with the first inserted part, so as to connect the joint body and the pipe.

According to the joint related to the first aspect, the pipe material is inserted into the second inserted part of the connecting part to reach the contacted part. Then, the pipe and the connecting portion are inserted into the first inserted portion of the joint body so that the outer peripheral portion of the connecting portion and the front end surface in the insertion direction contact the first inserted portion, thereby connecting the pipe to the joint body. Therefore, compared with the configuration in which the plurality of pipes are connected in a state where only the outer peripheral portions of the plurality of resin pipes are in contact with the inner peripheral portion of the joint, the work of connecting the pipes can be simplified.

In the joint related to the second aspect, in the joint related to the first aspect, the pipe material, the joint body, and the connecting portion are formed of thermoplastic resin.

According to the joint related to the second aspect, the pipe material, the joint body and the connection part can be welded by heating the pipe material, the joint body and the connection part.

In the joint related to the third aspect, in the joint related to the second aspect, the connecting part is formed by further including a magnetic substance.

According to the joint related to the third aspect, electromagnetic induction heating can be performed on the connection part.

The joint related to the fourth aspect is among the joints related to the third aspect, and the connection part is a thermoplastic resin coating product with a cylindrical magnetic body as a core material.

According to the joint related to the fourth aspect, compared with the configuration in which the connection part can be heated by electromagnetic induction, the connection part is formed by thermoplastic resin containing magnetic powder, and the electromagnetic induction heating can be shortened. The heating time of the connecting part.

In the joint related to the fifth aspect, in the joint related to the third aspect, the connecting portion is a molded article of thermoplastic resin containing magnetic powder.

According to the joint according to the fifth aspect, the connection part can be formed more easily than in the configuration in which the connection part is a core material having a magnetic substance in a configuration in which the connection part can be heated by electromagnetic induction.

In the joint related to the sixth aspect, in the joint related to any one of the first aspect to the fifth aspect, the connecting portion has a window portion that penetrates a part of the outer peripheral portion near the contacted portion in the radial direction .

According to the joint related to the sixth aspect, the insertion state of the pipe relative to the connection part can be confirmed through the visual window part.

In the joint related to the seventh aspect, in the joint related to any one of the first aspect to the sixth aspect, the connection part is further in contact with the inner peripheral part of the pipe inserted into the connection part.

According to the joint according to the seventh aspect, compared with the configuration in which the connecting portion only contacts the outer peripheral portion and the end surface of the pipe, the sealing performance between the connecting portion and the pipe can be improved.

In the joint related to the eighth aspect, in the joint related to the seventh aspect, the first inserted part has a cylindrical groove part sandwiched between the outer peripheral part of the joint body and the flow channel; The inserted portion has a cylindrical groove portion sandwiched between the outer peripheral portion and the inner peripheral portion of the connecting portion; the connecting portion further brings the inner peripheral portion into contact with the first inserted portion.

According to the joint related to the eighth aspect, compared with the configuration in which the first inserted part is a cylindrical concave part, the sealing performance between the joint body and the connecting part can be improved.

The connection method of the pipes related to the ninth aspect is to use: a cylindrical pipe made of thermoplastic resin; the joint body has a flow channel formed inside, and the shaft along the cylindrical pipe made of resin To the first inserted part into which the pipe is inserted, a plurality of pipes are connected through the flow channel; and the connection part is a cylindrical connection part arranged between the pipe and the joint body, and is composed of thermoplastic resin Formed with a magnetic body, it has: a second inserted portion in which the pipe is inserted in contact with the pipe along the axial direction, and an end surface of the pipe inserted into the second inserted portion abuts and contacts The abutted part is inserted into the first inserted part together with the pipe along the axial direction, so that the outer peripheral part and the end surface in front of the insertion direction will contact the first inserted part to connect the joint body and The pipe material has the following steps: the first insertion step is to insert the pipe material into the second inserted part of the connecting part; the second insertion step is to insert the pipe material into the second inserted part in the first insertion step The connection portion is inserted into the first inserted portion of the joint body; and the welding process is to heat the connection portion inserted into the joint body into which the pipe is inserted in the second insertion process by electromagnetic induction, to It is welded to the pipe and the joint body.

The connection method of the pipes according to the ninth aspect can be simplified compared to the case where the plurality of pipes are connected to the joint body in a state where the outer diameter portion of the resin pipe material is in contact with the inner diameter portion of the joint body. Welding operation and connection operation of pipes and joints.

As described above, according to the joint related to the present disclosure, the connection of the plurality of pipes can be simplified compared to the configuration in which the plurality of pipes are connected in a state where the outer peripheral parts of the plural resin pipes are in contact with the inner peripheral part of the joint. Operation.

Hereinafter, according to FIG. 1 to FIG. 11 , the joint 20 which is an example of an embodiment of the present invention and the connection method of the pipe 10 using the joint 20 will be described.

(summary of connector) As shown in FIG. 1 , the joint 20 connects two pipes 10 . That is, the joint 20 connects a plurality of pipes 10 .

As shown in FIG. 2 , the pipe 10 is a hollow cylindrical component formed of resin R with a melting point of TE and extending in one direction. In addition, the cylindrical shape in this case means a shape in which a cylinder extending in one direction has a through hole penetrating the cylinder in one direction (axial direction). Resin R is a thermoplastic resin. As the thermoplastic resin forming the pipe 10, for example, polybutene can be used. The hollow part of the pipe material 10 penetrates the pipe material 10 in the longitudinal direction (axial direction), and fluids such as water flow into the hollow part. The ends and end surfaces on both sides of the pipe 10 in the axial direction are respectively an end 12 and an end surface 14 .

As shown in FIG. 1 , the pipe material 10 is inserted into a groove portion 26 c of a straight portion 24 of a joint 20 described later with a sleeve 40 described later attached to one end portion 12 .

(joint) The joint 20 is provided with a joint body 22 and a sleeve 40 .

(joint body) As shown in FIGS. 3A and 3B , the joint body 22 is a hollow cylindrical component formed of thermoplastic resin and bent into an L-shape. The thermoplastic resin forming the joint body 22 can be, for example, polybutene. Moreover, the melting point of the thermoplastic resin forming the joint body 22 is preferably the same as the melting point TE of the thermoplastic resin forming the pipe 10 . Moreover, the thermoplastic resin forming the joint body 22 is more preferably the same material as the pipe 10 . In this embodiment, the thermoplastic resin forming the joint body 22 is the same resin R as the thermoplastic resin forming the pipe 10 .

The joint main body 22 has two cylindrical straight portions 24 extending in directions perpendicular to each other and a curved portion 22a curved to connect the two straight portions 24 . The end surface of each straight portion 24 is an end surface 24a.

The straight portion 24 has a columnar recess 26 that is recessed with respect to the end surface 24a. The concave portion 26 is an example of the first inserted portion. The opening and the end surface of the recessed part 26 become the opening 26a and the end surface 26b, respectively. The opening 26a is an example of the first opening. Moreover, the straight part 24 has the columnar protrusion part 28 which protrudes from the center part of the end surface 26b of the recessed part 26 to the side of the opening 26a. The end surface of the protruding part 28 becomes the end surface 28a. The protrusion length of the protrusion 28 is shorter than the depth of the recess 26 .

Moreover, since each straight portion 24 has the recessed portion 26 and the protruding portion 28 , a part of the recessed portion 26 becomes a cylindrical groove portion 26c sandwiched between the outer peripheral portion of the straight portion 24 and the protruding portion 28 . That is, the recessed part 26 has the cylindrical groove part 26c pinched between the outer peripheral part of the joint main body 22, and the protrusion part 28. As shown in FIG.

The hollow portion of the joint body 22 is formed in an L-shape penetrating from one straight portion 24 to the other straight portion 24 via the bent portion 22 a. Specifically, the hollow portion of the joint body 22 has a cylindrical hole 30 formed in the axial direction of the straight portion 24 extending from the end surface 28a of the protruding portion 28 of the straight portion 24 toward the curved portion 22a. Moreover, the hollow portion of the joint body 22 has a cylindrical hole 32 formed in the axial direction of the other straight portion 24 from the end surface 28a of the protruding portion 28 of the other straight portion 24 toward the bent portion 22a. The hole 30 and the hole 32 are connected by the bent portion 22 a to form a hole 34 penetrating the connector body 22 in an L-shape. That is, the hollow portion of the L-shaped bent joint body 22 is the hole 34 penetrating the joint body 22 along the shape of the joint body 22 . The hole portion 34 allows fluid such as water to flow in there. The hole portion 34 of the protruding portion 28 is an example of a flow channel.

(sleeve) As shown in FIGS. 4 and 5 , the sleeve 40 is a hollow cylindrical component extending along one direction. The sleeve 40 is an example of the connecting portion. As shown in Figures 1 and 7, the sleeve 40 can be inserted axially from the opening 26a into the sleeve 40 when the axis of any straight portion 24 of the joint body 22 is aligned with the axis of the sleeve 40. The function of the concave portion 26 of the straight portion 24. Moreover, the sleeve 40 has the function of allowing the end 12 of the pipe 10 to be inserted into the sleeve 40 along the axial direction when the axis of the pipe 10 is aligned with the axis of the sleeve 40 . In other words, the sleeve 40 has the function of being able to be installed on the end 12 of the pipe 10 . Specifically, the sleeve 40 has a cylindrical outer peripheral wall 50 that contacts the outer peripheral portion of the groove portion 26c of the joint body 22, and a cylinder having a diameter smaller than the outer peripheral wall 50 and that contacts the inner peripheral portion of the groove portion 26c. Shaped inner peripheral wall 52 . The outer peripheral wall 50 of the sleeve 40 is an example of the outer peripheral portion of the connecting portion. The inner peripheral wall 52 of the sleeve 40 is an example of the inner peripheral portion of the connecting portion. The outer peripheral wall 50 and the inner peripheral wall 52 align the end surfaces on both sides in the axial direction, and are connected to the bending portion 22a close to the joint body 22 in the axial direction by the annular end wall 40a formed along the direction of the end surfaces. end of one side. Further, the sleeve 40 has a through-hole 42 which is formed so as to be surrounded by an inner peripheral wall 52 and penetrates the sleeve 40 in the axial direction. The end surface of the sleeve 40 on the side of the end wall 40 a and the end surface on the opposite side to the end wall 40 a are respectively an end surface 48 and an end surface 46 . The end surface 48 is an end surface in front of the insertion direction of the recessed portion 26 of the joint body 22 . Moreover, the sleeve 40 has the cylindrical groove part 54 formed by the outer peripheral wall 50, the inner peripheral wall 52, and the end wall 40a. In other words, the groove portion 54 is formed so as to be sandwiched between the outer peripheral wall 50 and the inner peripheral wall 52 . The groove portion 54 is an example of the second inserted portion. The groove portion 54 has an opening 56 formed in the end surface 46 of the sleeve, and an end surface 58 which is a surface opposite to the end surface 48 of the end wall 40a. The opening 56 is an example of the second opening. The end surface 58 is an example of the abutted portion.

The groove portion 54 of the sleeve 40 has a size capable of fitting with the outer peripheral portion and the inner peripheral portion of the end portion 12 of the pipe material 10 . Moreover, the sleeve 40 allows the pipe material 10 to be inserted into the groove portion 54 in such a manner that the end surface 14 of the pipe material 10 abuts against the end surface 58 of the groove portion 54 . Accordingly, when the sleeve 40 is inserted into the groove portion 54 , the groove portion 54 is in contact with the end surface 14 , the outer peripheral portion, and the inner peripheral portion of the pipe material 10 .

Moreover, the length between the end surface 46 and the end surface 48 of the sleeve 40 is equal to the depth of the recess 26 of the joint body 22 as shown in FIG. 1 . That is, the axial length of the sleeve 40 is equal to the depth of the recess 26 of the joint body 22 . Thereby, the sleeve 40 will have the following function. When the end surface 48 of the sleeve 40 is inserted into the recess 26 of the joint body 22 and contacts the end surface 26b, the end surface 46 of the sleeve 40 will be opposite to the end surface of the joint body 22. 24a and become slightly flush. In addition, the outer peripheral wall 50 and the inner peripheral wall 52 of the sleeve 40 are dimensioned to fit the sleeve 40 to the groove portion 26c of the joint body 22 . That is, when the sleeve 40 is inserted into the concave portion 26 of the joint body 22 , the end surface 48 , the outer peripheral wall 50 and the inner peripheral wall 52 are in contact with the concave portion 26 .

In addition, in the sleeve 40 , a square window portion 60 penetrating the outer peripheral wall 50 in the radial direction is formed on a part of the outer peripheral wall 50 closer to the end face 48 than the end face 46 . In other words, the sleeve 40 has the window portion 60 that penetrates a part of the outer peripheral wall 50 in the vicinity of the end surface 58 of the groove portion 54 in the radial direction. In addition, the window portion 60 preferably has a size such that the position of the end surface 58 can be seen when viewing the window portion 60 from a radial direction.

As shown in FIG. 5 , the sleeve 40 is formed by coating a thermoplastic resin on the surface of a thin-walled cylindrical core material 62 which is somewhat similar to the sleeve 40 . The core material 62 is made of a magnetic material such as iron. That is, the sleeve 40 is a thermoplastic resin coating product with a magnetic body as a core material. Moreover, the sleeve 40 is comprised by the core material 62 containing a magnetic body, and thermoplastic resin. As the thermoplastic resin forming the sleeve 40, polybutylene, for example, can be used. Furthermore, the melting point of the thermoplastic resin forming the sleeve 40 is preferably the same as either the melting point TE of the thermoplastic resin forming the pipe 10 or the melting point of the thermoplastic resin forming the joint body 22 . Moreover, the thermoplastic resin forming the sleeve 40 is more preferably the same material as any one of the pipe 10 or the joint body 22 . Moreover, the thermoplastic resin forming the sleeve 40 is preferably the same material as both the pipe 10 and the joint body 22 . In this embodiment, the thermoplastic resin forming the sleeve 40 is the same resin R as the thermoplastic resin forming the pipe 10 and the joint body 22 . That is, the melting point of the thermoplastic resin forming the sleeve 40 , the pipe 10 and the joint body 22 is TE.

When the pipe 10 with the sleeve 40 installed is inserted into the recess 26 of the joint body 22, the fluid flowing in the hollow portion of the pipe 10 toward the end 12 will pass through the through hole of the sleeve 40 installed at the end 12 of the pipe 10 42 to flow into the hole 34 of the joint body 22 . In this way, the sleeve 40 has the function of connecting the hole 34 of the joint body 22 and the pipe 10 .

(How to connect pipes) Next, the sequence of steps of the method of connecting the pipes 10 using the joint 20 of this embodiment will be described.

(1) First, the sleeve 40 is attached to the end portion 12 of the pipe material 10 (first insertion step). Specifically, as shown in FIG. 6A, the end 12 of the pipe 10 is inserted into the groove 54 of the sleeve 40, and the end surface 14 of the pipe 10 is pressed against the sleeve 40 as shown in FIGS. 1 and 6B. The end surface 58 of the groove portion 54 is in contact with each other. At this time, the operator confirms that the end surface 14 of the pipe material 10 is in contact with the end surface 58 of the groove portion 54 of the sleeve 40 by visually observing that the outer diameter portion of the pipe material 10 is exposed from the window portion 60 of the sleeve 40 .

(2) Next, as shown in FIG. 7A , insert the pipe 10 with the sleeve 40 installed in the first insertion step into the recess 26 of the joint body 22, and make the sleeve 40 as shown in FIGS. 1 and 7B . The end surface 48 comes into contact with the end surface 26b of the concave portion 26 (second insertion step). At this time, the operator confirms that the end surface 48 of the sleeve 40 has contacted the end surface 26b of the recessed portion 26 of the joint body 22 by visually observing that the end surface 46 of the sleeve 40 is almost flush with the end surface 24a of the joint body 22 .

(3) Next, as shown in Figures 8 and 9, the electromagnetic induction heating mechanism 70 is installed on the outer peripheral portion of the joint body 22 that overlaps with the sleeve 40 in the radial direction (installation process), and the joint body 22 is attached to The pipe material 10 to which the sleeve 40 was attached in the second insertion step is inserted into the concave portion 26 .

The electromagnetic induction heating mechanism 70 is configured to heat the sleeve 40 into which the pipe material 10 is inserted and inserted into the joint body 22 in the second insertion step by electromagnetic induction. Specifically, the electromagnetic induction heating mechanism 70 has a main body portion 72, a pinching portion 74 that pinches the outer circumference of the straight portion 24 of the joint body 22 in a full circle, and an operating portion 76 that can operate the opening and closing of the pinching portion 74. device. The electromagnetic induction heating mechanism 70 has the function of opening and closing the clamping portion 74 by using the operating portion 76 , so that it can be mounted and disassembled relative to the joint body 22 . Moreover, the electromagnetic induction heating mechanism 70 also has the function of generating a magnetic field in the space pinched by the pinching portion 74 when the pinching portion 74 is in a closed state. Moreover, the electromagnetic induction heating mechanism 70 has a space in which the magnetic field is generated in the clamping part 74 when the sleeve 40 is disposed, so as to electromagnetically induce heat the magnetic body (ie, the core material 62) contained in the sleeve 40. function. As a specific example of the electromagnetic induction heating mechanism 70 related to this embodiment, there is a TRITON (registered trademark) system manufactured by Watts Corporation.

(4) After installing the electromagnetic induction heating mechanism 70 on the joint body 22 in the installation process, use the electromagnetic induction heating mechanism 70 to heat the sleeve 40 installed on the pipe 10 and inserted into the recess 26 of the joint body 22, so that It is welded to the pipe material 10 and the joint body 22 (welding process). Specifically, the electromagnetic induction heating mechanism 70 is used to heat the core material 62 of the sleeve 40 by electromagnetic induction for a set time TI, so that the contact portion between the sleeve 40 and the pipe 10 and the contact between the sleeve 40 and the joint body 22 The contact portion is heated to a temperature above the temperature TE. The contact surfaces of the pipe 10 , the joint body 22 , and the sleeve 40 in contact with the pipe 10 and the joint body 22 are heated to a temperature above the melting point TE of the resin R to be in a molten state. Specifically, the end face 14, the outer peripheral portion, and the inner peripheral portion of the end portion 12 of the pipe 10, and the end face 58, the outer peripheral portion, and the inner peripheral portion of the groove portion 54 of the sleeve 40 are melted by the heating. Also, the end surface 26b, the outer peripheral portion, and the inner peripheral portion of the groove portion 26c of the joint body 22, the end surface 48 of the sleeve 40, the peripheral surface of the concave portion 26 side of the outer peripheral wall 50, and the peripheral surface of the groove portion 26c side of the inner peripheral wall 52 will be This heating melts.

After the heating by the electromagnetic induction heating mechanism 70 and the set time TI elapses, the electromagnetic induction heating mechanism 70 will stop heating, so that the pipe 10, the joint body 22 and the sleeve 40 are cooled to a temperature lower than the temperature TE. The sleeve 40 after melting the contact surface with the pipe material 10 and the joint body 22 by the electromagnetic induction heating mechanism 70 is fused with the pipe material 10 and the joint body 22 due to the cooling.

The above is the sequence of steps of the method for connecting the pipes 10 using the joint 20 of this embodiment.

(function and effect) Next, the action and effect of the joint 20 of this embodiment and the connection method of the pipe material 10 using the joint 20 will be described. In addition, in this description, when describing the comparative form with respect to an embodiment, when using the same parts etc. as the joint 20 and the pipe material 10, it demonstrates using the code|symbol and the name of these parts etc. directly.

The joint 20 of this embodiment is equipped with a sleeve 40, and the sleeve 40 has an end face 58 of the groove 54 which is in contact with the end face 14 of the pipe 10, and which is in contact with the end face 26b of the recess 26 of the joint body 22. The end face 48 of the contact. The joint 20 of this embodiment is compared with the joint 120 shown below as the first comparative form.

As shown in FIG. 10A , a joint 120 of a comparative type is a cylindrical component formed of resin R and extending in one direction. As shown in FIG. 10B , the joint 120 is heat-sealed in a state where only the outer peripheral portion of the pipe material 10 and the inner peripheral portion of the joint 120 are in contact. In this case, in order to confirm that the pipe material 10 is fully inserted into the joint 120 at the time of heat welding, the pipe material 10 inserted into the joint 120 is coated with the outer peripheral portion of the part inserted into the joint 120 at the time of heat welding. Peeling with slight removal on other peripheral parts. The peeled pipe 10 has a step 112 formed by the outer peripheral part of the part inserted into the joint and the other outer peripheral parts. When the pipes 10 are thermally welded to the joint 120 in order to use the joint 120 to connect multiple pipes 10 , the operator confirms that the pipe 10 has been fully inserted into the joint 120 by visually observing the step 112 formed by the peeling process. In other words, when the pipe 10 and the joint 120 are thermally welded in a state where only the outer periphery of the pipe 10 and the inner periphery of the joint 120 are in contact, the operator has to peel the pipe 10 in advance.

On the other hand, the joint 20 of the present embodiment is equipped with a sleeve 40 having an end surface 58 of a groove 54 that contacts the end surface 14 of the pipe 10 and a recess 26 that meets the joint body 22 . The end surface 26b abuts against and contacts the end surface 48 . Therefore, when using the joint 20 of the embodiment, when inserting the pipe material 10 into the joint 20 in order to thermally weld it to the joint 20, it is only necessary to go through the first insertion step and the second insertion step. Specifically, when inserting the pipe material 10 into the joint 20 in order to heat-seal the pipe material 10 to the joint 20, it is only necessary to insert the pipe material 10 into the sleeve so that the end surface 14 of the pipe material 10 contacts the end surface 58 of the groove portion 54 of the sleeve 40. Canister 40 gets final product. In addition, when inserting the pipe material 10 into the joint 20 by heat welding, it is only necessary to insert the pipe material 10 so that the end surface 48 of the sleeve 40 is in contact with the end surface 26b of the recessed part 26 of the joint body 22. It only needs to insert the sleeve 40 into the joint body 22 . That is, in the connection method of the pipe materials 10 using the joint 20 of the embodiment, the peeling work of the pipe materials 10 is not required. Therefore, the joint 20 of this embodiment can simplify the construction of the pipes 10 compared to the configuration in which the plurality of pipes 10 are connected in a state where only the outer peripheral portions of the plurality of resin pipes 10 are in contact with the inner peripheral portion of the joint. Connect job. In addition, the connection method of the pipes 10 using the joint 20 of this embodiment is compared to connecting the plurality of pipes 10 in a state where only the outer peripheral parts of the plurality of resin pipes 10 are in contact with the inner peripheral part of the joint. In this case, the welding operation and connection operation of the pipe material 10 and the joint 20 can be simplified.

Moreover, regarding the joint 20 of this embodiment, the pipe 10, the joint main body 22, and the sleeve 40 are formed of the resin R which is a thermoplastic resin. Therefore, in the joint 20 of this embodiment, the pipe 10, the joint body 22 and the sleeve 40 can be fused by heating the pipe 10, the joint body 22 and the sleeve 40 to a temperature above the melting point TE of the resin R.

In addition, regarding the joint 20 of this embodiment, the sleeve 40 is composed of the core material 62 which is a magnetic body. Therefore, the joint 20 of this embodiment can heat the sleeve 40 by electromagnetic induction.

In addition, the joint 20 of this embodiment has a sleeve 40 formed by coating the surface of the core material 62 of the magnetic body with a resin R, and is composed of a coating product of a thermoplastic resin. That is, the joint 20 of the present embodiment has a sleeve 40 with a core material 62 as a magnetic body. Therefore, compared to the case where the joint 20 is formed of a thermoplastic resin containing magnetic powder, the sleeve can be easily heated by electromagnetic induction. Therefore, compared with the joint 20 of this embodiment, which can heat the sleeve 40 by electromagnetic induction, the sleeve is formed of thermoplastic resin containing magnetic powder, and the time caused by electromagnetic induction heating can be shortened. The heating time of the sleeve 40.

Also, the joint 20 of this embodiment has a window portion 60 that penetrates a portion of the outer peripheral wall 50 near the end surface 58 of the groove portion 54 of the sleeve 40 in the radial direction. Therefore, in the joint 20 of this embodiment, the insertion state of the pipe 10 relative to the sleeve 40 can be confirmed through the viewing window 60 .

Moreover, the joint 20 of this embodiment is such that the sleeve 40 is further in contact with at least one of the inner peripheral portion or the outer peripheral portion of the pipe 10 inserted into the sleeve 40 . Therefore, compared with the configuration in which the sleeve 40 only contacts the end face 14 of the pipe 10 inserted into the sleeve 40 , the joint 20 of this embodiment can improve the sealing performance between the sleeve 40 and the pipe 10 .

Also, the joint 20 of this embodiment has the following structure: it has a cylindrical groove 26c formed in the joint body 22 and a cylindrical groove 54 formed in the sleeve 40, and the inner peripheral wall 52 of the sleeve 40 is It is in contact with the groove portion 26c of the concave portion 26 of the joint body 22 . The joint 20 of this embodiment is compared with the joint 200 shown below as the second comparative form.

As shown in FIGS. 11A and 11B , the joint 200 of the second comparative type is provided with a joint body 222 and a sleeve 240 instead of the joint body 22 and the sleeve 40 of the embodiment. Compared with the recessed part 26 of the embodiment, the connector body 222 of the second comparative form has a recessed part 226 in which no protruding part 28 is formed. That is, the joint main body 222 of the second comparative type does not have a configuration corresponding to the groove portion 26c in the embodiment. Also, the sleeve 240 of the second comparative form does not have a configuration equivalent to the inner peripheral wall 52 of the sleeve 40 in the embodiment. That is, the sleeve 240 of the second comparative type has a columnar concave portion 254 instead of the groove portion 54 in the embodiment. Therefore, the sleeve 240 of the second comparative type is only in contact with the outer peripheral wall 50 and the end wall 40 a with respect to the recess 226 of the joint body 222 into which the sleeve 240 is inserted. In addition, the sleeve 240 is not in contact with the inner peripheral portion of the pipe 10 inserted into the concave portion 254 of the sleeve 240 . In other words, the sleeve 240 only contacts the outer periphery and the end surface 14 of the end 12 of the pipe 10 inserted into the concave portion 254 of the sleeve 240 . Except for the above points, the joint 200 of the second comparative type has the same structure as the joint 20 of the embodiment.

The sleeve 240 of the second comparative type contacts only the outer peripheral wall 50 and the end wall 40 a with respect to the recess 226 of the joint body 222 into which the sleeve 240 is inserted. On the other hand, in the joint 20 of the embodiment, the inner peripheral wall 52 of the sleeve 40 contacts the protrusion 28 forming the groove 26 c of the joint body 22 . Therefore, compared with the joint 200 of the second comparative type, the contact area of the sleeve 40 relative to the joint body 22 will be larger in the joint 20 of the embodiment. Therefore, the joint 20 of this embodiment can improve the sealing performance between the joint body 22 and the sleeve 40 compared with the inserted portion of the joint body into which the sleeve 40 is inserted is formed as a cylindrical recess. In addition, the joint 200 of the aforementioned second comparative type is covered by the technical idea of the present invention.

As mentioned above, although the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various modifications, changes and improvements can be made within the scope of the technical idea of the present invention.

For example, the sleeve 40 of the embodiment is a thermoplastic resin coating product formed by coating the resin R on the surface of the core material 62 of the magnetic body. However, the sleeve as an example of the connection part related to the present invention is not limited to a thermoplastic resin coating product as long as it can be heated by electromagnetic induction. For example, the sleeve according to the present invention may have a thermoplastic resin containing powder of magnetic materials such as iron, and may be formed by injection molding or the like. That is, the connecting part according to the present invention may also be a molded article of thermoplastic resin containing magnetic powder. Therefore, compared with the configuration in which the connecting portion has a magnetic core material, the connecting portion of the present invention can easily form the connecting portion. In addition, in this configuration, the thermoplastic resin may contain powders of plural kinds of magnetic substances. For example, the thermoplastic resin containing powder of a magnetic substance may contain two types of powders, namely a powder that is easily magnetized and a powder with high thermal conductivity.

Also, the joint 20 of the embodiment is to connect two pipes 10 . However, the joint related to the present invention may also have a configuration that connects more than three pipes 10 .

Also, the connector body 22 of the embodiment is bent into an L-shape. However, the joint body of the joint related to the present invention is not limited to being bent into an L-shape, and may also have a structure extending in one direction.

In addition, in the connection method of the pipes 10 using the joint 20 of the embodiment, the electromagnetic induction heating mechanism 70 is used in the electromagnetic induction heating of the sleeve 40. The holding part 74 of the part 24. However, in the connection method of the pipes 10 related to the present invention, as long as the sleeve 40 can be heated by electromagnetic induction, the electromagnetic induction heating mechanism is not limited to the electromagnetic induction heating mechanism 70 having the clamping portion 74 . For example, the method implemented by the electromagnetic induction heating mechanism related to the present invention can also be to arrange the joint body 22 inserted with the sleeve 40 (the sleeve 40 is inserted with the pipe 10) in a coil that can surround the joint body 22 as a whole The inner side of the coil, so that the magnetic field is generated on the inner side of the coil.

10: pipe 12: end 14: End face 20: Connector 22: Connector body 22a: bending part 24: straight part 24a: end face 26: Concave 26a: opening 26b: end face 26c: Ditch 28: protrusion 28a: end face 30: Hole 32: Hole 34: Hole 40: Sleeve 40a: end wall 42: Through hole 46: end face 48: end face 50: peripheral wall 52: inner peripheral wall 54: Groove 56: opening 58: end face 50: peripheral wall 52: inner peripheral wall 54: Groove 56: opening 58: end face 60: window 62: core material 70: Electromagnetic induction heating mechanism 72: Body Department 74: Hostage department 76: Operation Department 112: segment difference 120: Connector 200: Connector 222: joint body 226: Concave 240: Sleeve 254: Concave R: Resin

Fig. 1 is a sectional perspective view of a joint related to an embodiment of the present invention. Fig. 2 is a perspective view of a pipe related to an embodiment of the present invention. Fig. 3A is a perspective view of a joint body related to an embodiment of the present invention. Fig. 3B is a sectional perspective view of the connector body related to the embodiment of the present invention. Fig. 4 is a perspective view of a connection part related to an embodiment of the present invention. Fig. 5 is a cross-sectional perspective view of a connecting portion related to an embodiment of the present invention. Fig. 6A is a perspective view showing the first insertion process related to the embodiment of the present invention. Fig. 6B is a perspective view showing a connection portion into which a pipe is inserted in the first insertion step according to the embodiment of the present invention. Fig. 7A is a perspective view showing the second insertion process related to the embodiment of the present invention. Fig. 7B is a perspective view showing a joint inserted with a connection part into which a pipe is inserted in the second insertion step related to the embodiment of the present invention. Fig. 8 is a perspective view showing a joint installed with an electromagnetic induction mechanism related to an embodiment of the present invention. Fig. 9 is a sectional view of line 9-9 in Fig. 8 . Fig. 10A is a cross-sectional view showing a process of inserting a pipe material into a joint related to a first comparative type of the embodiment of the present invention. Fig. 10B is a cross-sectional view showing a joint inserted with a pipe material related to the first comparative form of the embodiment of the present invention. Fig. 11A is a cross-sectional view showing a joint related to a second comparative form of the embodiment of the present invention. Fig. 11B is a cross-sectional view showing a joint related to a second comparative form of the embodiment of the present invention.

10: pipe

12: end

14: End face

20: Connector

22: Connector body

22a: bending part

24: straight part

24a: end face

26: Concave

26b: end face

26c: Ditch

30: Hole

32: Hole

34: Hole

40: Sleeve

46: end face

48: end face

58: end face

Claims (9)

A connector having: The joint body has a flow channel formed inside, and a first inserted portion into which the tube is inserted along the axial direction of the resin cylindrical tube, and a plurality of the tubes are connected through the flow channel; and The cylindrical connecting part is disposed between the pipe and the joint body, has a second inserted part which is inserted into the pipe along the axial direction and contacts the pipe, and is inserted into the second The abutted part of the pipe material of the inserted part abuts and contacts is inserted into the first inserted part along the axial direction together with the pipe material, so that the outer peripheral part and the end face forward in the insertion direction meet the first inserted part. 1 is contacted by the insertion part to connect the joint body and the pipe. As for the joint of item 1 of the scope of application, wherein the pipe, the joint body and the connection part are formed of thermoplastic resin. As in the connector of item 2 of the scope of the patent application, wherein the connection part is further formed by including a magnetic body. Such as the joint of item 3 of the scope of the patent application, wherein the connecting part is a thermoplastic resin coating product with a cylindrical magnetic body as the core material. As in the joint of claim 3, wherein the connecting part is a molded article of thermoplastic resin containing magnetic powder. The joint according to any one of claims 1 to 5 of the patent claims, wherein the connecting portion has a window portion that penetrates a part of the outer peripheral portion near the abutted portion in the radial direction. The joint according to any one of claims 1 to 5 of the patent application, wherein the connecting part is further in contact with the inner peripheral part of the pipe inserted into the second inserted part. For the joint of item 7 of the scope of the patent application, wherein the first inserted part has a cylindrical groove part sandwiched between the outer peripheral part of the joint body and the flow channel; The second inserted portion has a cylindrical groove portion sandwiched between the outer peripheral portion and the inner peripheral portion of the connecting portion; The connecting portion further brings the inner peripheral portion into contact with the first inserted portion. A method for connecting pipes, using: Cylindrical tubing made of thermoplastic resin; The joint body has a flow channel formed inside, and a first inserted portion into which the tube is inserted along the axial direction of the resin cylindrical tube, and a plurality of the tubes are connected through the flow channel; and The connection part is a cylindrical connection part arranged between the pipe and the joint body, and is formed of thermoplastic resin and magnetic body, and has: the pipe is inserted along the axial direction and contacts the pipe The second inserted portion, and the abutted portion that abuts against and contacts the end surface of the pipe inserted into the second inserted portion, are inserted into the first inserted portion along the axial direction together with the pipe. , so that the outer peripheral portion and the front end face in the insertion direction will be in contact with the first inserted portion to connect the joint body and the pipe; Has the following procedures: the first inserting step is inserting the pipe material into the second inserted part of the connecting part; The second inserting step is inserting the connecting portion into which the pipe is inserted in the first inserting step into the first inserted portion of the joint body; and In the welding process, electromagnetic induction is used to heat the connection portion inserted into the joint body into which the pipe is inserted in the second insertion process, so as to be welded to the pipe and the joint body.

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