JPH08178147A - Integral molding method for piping joint and constituting member thereof - Google Patents

Abstract

PURPOSE: To provide a piping joint having a constituting member to prevent the occurrence of with a mold during mold release at an integral molding process for the constituting member of a piping joint. CONSTITUTION: A lock piece 50 formed of a resilient plate material is inserted at a base part in the other end part in a peripheral direction of a fixing member 40A and extended in the direction of the lock hole part 34 of a fixing member 30A. A lock hole part 53 locked to the claw 35 of the fixing member 30A is formed in the lock piece 50 and the tip part 52 of the lock piece 50 is curved in such a manner to easily move over the claw 35. Further, a direction of insertion of the lock piece 50 in the end part on the other side in a peripheral direction of the fixing member 40A is inclined so that the tip part 52 side of the lock piece is positioned at the further outside in a radial direction of the fixing member 40A than the base part 51 side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint suitable for use in various fluid circuits such as a refrigerant pipe joint of a refrigeration circuit, its constituent members, and a method for integrally forming the same.

[0002]

2. Description of the Related Art Conventionally, as a method of connecting pipes through which a fluid flows in a fluid circuit, a method of connecting with a union nut is known. This connection method requires a long mounting time because the manufacturing cost of the connection member is low, but management of tightening torque is essential. Therefore, the total cost is increased. Moreover, since a tool such as a torque wrench is indispensable at the time of installation, a working space for using this tool is required around the pipe joint.

Therefore, at the time of installation, no tools are required,
In addition, as a pipe joint that can reduce the installation time, for example, as disclosed in Japanese Patent Publication No. 60-59478, there is a pipe joint that is pressed and fixed from the outside of the female side joint by a circular spring.

[0004]

By the way, there are times when it is necessary to replace or remove a device due to a failure of the device. At this time, according to the pipe joint disclosed in Japanese Patent Publication No. 60-59478, a special tool is required to remove the male side joint and the female side joint after the pipe is attached. Has a problem that it is difficult to remove.

Therefore, the applicant of the present invention first firmly uses the internal pressure of the fluid enclosed in the pipe joint to firmly fasten the pipe joint and facilitates the removal when the fluid is not enclosed. Therefore, the following pipe fittings were provided. As shown in FIGS. 10 and 11, this piping joint includes a male side joint 10, a female side joint 20, and a substantially semi-cylindrical fixing member 30, 4 made of resin hinged to each other.
It is composed of 0 and.

Both fixing members 30 and 40 are made of resin (for example,
They are integrally formed by polybutylene terephthalate, polyphenylene sulfide, or those in which 40% of glass is added), and each of the fixing members 30 and 40 has a hinge at each of the opposite ends in the circumferential direction. Portions 31 and 41 are formed. Here, the hinge portions 31 and 41 are hinged to each other so as to be rotatable.

A locking hole portion 32 is formed in a quadrangular annular shape on the outer peripheral surface of the other end portion of the fixing member 30 in the circumferential direction, while the outer peripheral surface of the other end portion of the fixing member 40 in the circumferential direction is The locking portion 42 is formed in a rectangular parallelepiped shape so as to face the locking hole portion 32. As shown in FIGS. 10 and 11, the locking hole portion 32 is opened along the circumferential direction toward the locking portion 42 side, and the radially outer inner wall of the locking hole portion 32 has a right-angled cross section. Triangular claws 33 (see FIG. 11) are formed to project. The inclined wall 33a of the claw 33 is formed so as to be higher toward the left side in the drawing in FIG.

A metal plate spring-like locking piece 50 of stainless steel or the like is insert-molded at the base portion 51 of the locking portion 42 when the fixing member 40 is integrally molded with resin. , Extends along the circumferential direction so as to be inserted into the locking hole portion 32. In this case, the end surface 42a of the locking portion 42 that extends the locking piece 50 is within the radial surface of the joints 10 and 20, and the extension angle of the locking piece 50 from the end surface 42a of the locking portion 42. Is 90 degrees.

Further, as shown in FIG. 11, the tip 52 of the locking piece 50 is curved upward toward the upper side of the claw 33 so as to easily ride on the inclined wall 33a of the claw 33 in the locking hole 32. A locking hole 53 for locking the claw 33 is formed in the middle of the locking piece 50. Also,
A retaining hole 54 is formed in the base portion 51 of the locking piece 50 so that the locking member 42 can be prevented from coming off from the locking portion 42 after insert molding into the fixing member 40.

In the pipe joint thus constructed,
Both fixing members 30 and 40 sandwich the male-side joint 10 and the female-side joint 20 fitted coaxially with each other from the radial direction. Then, in the process of sandwiching in this way, the locking piece 50 is inserted into the locking hole portion 32 while riding on the inclined wall 33a of the claw 33 at the tip portion 52 thereof. As a result, the claw 33 is locked in the locking hole portion 53, and both fixing members 3
0 and 40 are fixed to each other.

By the way, in manufacturing this pipe joint,
The locking piece 50 is integrally insert-molded with the fixing member 40 as follows. First, a mold apparatus S having a cross-sectional shape as shown in FIGS. 12 to 14 is prepared.
The mold device S is composed of a mold 60 (hereinafter referred to as a core mold 60), a mold 70 (hereinafter referred to as a cavity mold 70), and a mold 80 (hereinafter referred to as a slide mold 80). The mold 60, the cavity mold 70, and the slide mold 80 are in the combined state shown in FIG.
A space 90 having a substantially semi-cylindrical cross section corresponding to the shape of the fixing member 40.
And a liquid-tight positioning of the insert molding position with respect to the void 90 of the locking piece 50, which will be described later.

The core mold 60 is obtained by stamping out the outer shape of the fixing member 40 on the concave side. The cavity die 70 is used for die-cutting the convex outer shape of the fixing member 40 in the direction opposite to the die-cutting direction of the core die 60. The cavity die 70 moves horizontally via a guide rail (not shown). Possible core type 6
It is connected to 0. And this cavity mold 70
13 is separated from the core mold 60 by moving horizontally from the combined state with the core mold 60 shown in FIG. 12 along the guide rail to the right in the drawing as shown in FIGS.

Further, the slide die 80 is used to remove the portion of the fixing member 40 into which the locking piece 50 is inserted from the other end in the circumferential direction of the fixing member 40 in the direction opposite to the one end in the circumferential direction. The slide die 80 is accommodated in a recess 60a formed in the lower portion of the core die 60 so as to be vertically movable via a guide pin 71 of a cavity die 70. The slide die 80 moves downward along the guide pin 71 as the cavity die 70 moves to the right as shown in FIGS. 13 and 14 from the housed state in the recess 60a shown in FIG. Move to. The inner diameter of the through hole of the slide die 80 into which the guide pin 71 is inserted is made larger than the outer diameter of the guide pin 71 so as to facilitate relative movement between the two.

Further, in order to insert-mold the locking piece 50, the core mold 6 is formed in consideration of the shape unique to the locking piece 50.
The following ideas have been made for the shapes of the 0 and slide molds 80. That is, considering that the extending angle of the locking piece 50 from the end surface 42a of the locking portion 42 is 90 degrees and the locking piece 50 has the curved tip portion 52 as described above, the recess 60a is formed. At the end of the opposing wall 61 of the slide mold 80 of FIG.
1a is formed so as to project downward. In such a case, the step 6
The downward projection length of 1a is such that when the locking piece 50 is positioned as shown in FIG.
Contacts the intermediate portion of the opposing wall 61 and the locking piece 50
The remaining portion of the step is set so as to horizontally contact the lower surface of the stepped portion 61a.

On the other hand, the facing wall 81 of the slide die 80 with respect to the core die 60 is a stepped wall portion 81a, 81b (see FIG. 12,
(See FIG. 13), and the wall 81a is formed with a groove 81c for accommodating the locking piece 50. Groove 81
The depth of c is equal to the plate thickness of the locking piece 50.
Is equal to the width of the locking piece 50. Further, the height of the wall portion 81b from the wall portion 81a is equal to the downward protruding length of the step portion 61a.

Then, the core mold 60 and the cavity mold 70 are formed.
When the slide mold 80 is placed in the combined state shown in FIG. 12 as described above, the insert molding position is positioned with respect to the space 90 of the locking piece 50 housed in the groove 81c as shown in the drawing. . At this time, the locking piece 50 extends into the space 90 (a portion corresponding to the locking portion 42) at the base portion 51 thereof. The middle portion of the locking piece 50 is located on the lower surface of the step 61 a and the groove 8 of the slide die 80.
It is liquid-tightly sandwiched by the inner peripheral wall of 1c. As a result, the communication between the void 90 and the groove 81c is blocked. Further, the tip portion 52 of the locking piece 50 has a recess 60 a in the core die 60.
It hits an intermediate portion of the opposing wall 61 of the.

As described above, the pre-process required for injecting the resin from the injection device into the cavity 90 is completed for the molding of the fixing member 40 and the insert molding of the locking piece 50 for the fixing member 40. When resin is injected from the injection device into the space 90 in such a state, the injected resin fills the entire space inside the space 90 and the inside of the retaining hole 54 of the locking piece 50. At this time, as described above, since the communication between the void 90 and the groove 81c is blocked, the resin in the void 90 does not leak into the groove 81c.

After that, when the injected resin in the space 90 is solidified, the integral molding of the fixing member 40 with the resin is completed, and the insert molding of the locking piece 50 into the fixing member 40 is simultaneously completed. Then, as shown in FIG. 13, when the cavity mold 70 is moved to the right, the fixing member 40 is moved to the right along the guide rail while being held by the core mold 60 and separated from the core mold 60. . Along with this, the slide die 80 moves downward along the guide pins 71.
Then, as shown in FIG. 14, after the cavity mold 70 is further separated from the core mold 60, both rods 6 of the core mold 60 are separated by an appropriate driving means such as a linear actuator.
2 is pushed rightward in the drawing to push the fixing member 40 out of the core mold 60. As a result, the production of the integrally molded product of the resin of the fixing member 40 in which the locking piece 50 is insert-molded is completed.

The fixing member 30 is also made of resin in the same manner as the fixing member 40 by a mold device having a core mold and a cavity mold similar to the core mold 60 and the cavity mold 70. However, in the process of separating the fixing member 40 from the core mold 60 by the driving means as described above,
The following problems occur. Hereinafter, this point will be described in detail.

When the resin injected into the cavity 90 is solidified as described above, the locking piece 50 has the tip portion 52 with the recess 60.
It is firmly supported by the locking portion 42 of the fixing member 40 in a state of being brought into contact with the intermediate portion of the opposing wall 61 of a. Therefore,
In such a state, when the fixing member 40 is pushed out from the core mold 60 as described above, the tip portion 52 of the locking piece 50.
Moves to the right along the intermediate portion of the facing wall 61 of the recess 60a and the lower surface of the stepped portion 61a.

In this case, the tip portion 52 of the locking piece 50 extends downward from the intermediate portion of the facing wall 61 to the lower surface of the step portion 61a against the spring action of the locking piece 50, while interfering with the step portion 61a. Displaces and moves to the right. For this reason, the tip 52 of the locking piece 50 rubs the lower surface of the step 61a along the moving direction thereof, and the lower surface of the step 61a is scratched and the tip 52 of the locking piece 50 is also scratched. Get stuck.

Therefore, the disconnection between the groove 81c of the slide die 80 and the void 90 cannot be maintained due to the scratches on the step 61a, and the void is left in the void 90 during the subsequent molding of the fixing member 40. A situation occurs in which the injected resin passes through the scratched portion of the step 61a and leaks into the groove 81c. As a result, the quality of the core mold 60 as a mold is deteriorated, and thus the molding accuracy of the mold S is deteriorated. Also,
If the tip portion 52 of the locking piece 50 is scratched, the quality of the fixing member 40, that is, the piping joint as a product is deteriorated.

In view of the above, the first aspect of the present invention provides a pipe joint having a component member that does not cause interference with the mold at the time of mold release in the integral molding process of the component member of the pipe joint described above. The purpose is to provide. Also,
A second object of the present invention is to provide a constituent member that does not interfere with the mold during mold release in the integral molding process applied to the above-mentioned pipe joint.

In order to cope with the above-mentioned problems, a third aspect of the present invention is an integral molding method of the above-mentioned constituent members of the pipe joint, in which the insert molding condition of the locking piece with respect to the fixing member and the shape of the mold. By adding a device to
The purpose is to prevent the occurrence of scratches on both the mold and the locking piece.

[0025]

In order to achieve the above object, in the invention according to claim 1, in a pipe joint for connecting both fluid pipes (P1, P1), both pipes (P1, P1) are connected. A female pipe member (10) provided at one end, a male pipe member (20) provided at the end of the other pipe and fitted into the female joint member (10), and a resin material The two pipe members (10, 10) are formed into a substantially semi-cylindrical shape and are hinged at one end portion in the circumferential direction facing each other.
20) and first and second fixing members (30A, 40A) for sandwiching the first fixing member (30A).
At the other end in the circumferential direction, a locking hole portion (34) that opens toward the other end in the circumferential direction of the second fixing member (40A) is provided, and on the outer inner wall of the locking hole portion. Claws (35)
And a locking piece (50 made of an elastic plate material that is inserted into the other end portion in the circumferential direction of the second fixing member (40A) at the base portion and extends toward the locking hole portion (34). ), A locking hole (53) for locking the claw (35) is formed in the locking piece, and the tip (52) of the locking piece (50) is formed.
Bends so that it easily rides on the claw (35), and the second
As for the insertion direction of the locking piece (50) with respect to the other end in the circumferential direction of the fixing member (40A), the tip end (52) side of this locking piece is located closer to the second fixing member (40A) than its base (51) side. ) Is provided so as to be positioned radially outward of the pipe fitting.

Further, in the invention described in claim 2,
The pipe joint according to claim 1, wherein the tip (52) of the locking piece (50) is curved in the protruding direction of the claw (35), and the locking piece (50) is attached to the tip (52). The engaging hole portions (53) are formed adjacent to each other.

Further, according to the invention described in claim 3, in the pipe joint according to any one of claims 1 and 2, a first outer shape of the concave portion of the second fixing member (40A) is stamped out.
A die (60A, 60B), a second die (70) for die-removing the convex outer shape of the second fixing member (40A) in a direction opposite to the die-removing direction of the first die (60A, 60B), 2) A part of the second fixing member (40A) into which the locking piece (50) is inserted is die-cut from the other end in the circumferential direction of the second fixing member (40A) in the direction opposite to the one end in the circumferential direction. Mold (80A, 80
Second fixing member (40, 40A) in combination with B)
Forming a semi-cylindrical cavity (90) corresponding to the shape of the above, and in the process of forming, the tip end (52) side of the locking piece is radially outside the cavity (90) rather than the base side. The base portion (51) of the locking piece (50) is inserted into a portion corresponding to the other end portion in the circumferential direction of the second fixing member (40A) of the void (90) while being inclined so as to be positioned at the position. Then, the middle portion of the locking piece (50) is liquid-tightly held by the end portions of the opposing walls of the first and third molds (60A, 60B, 80A, 80B) on the space (90) side, There is provided a method for integrally molding component members in a pipe joint, which comprises injecting and solidifying a resin into the void (90) to integrally mold the second fixing member (40A) and the locking piece (50).

Further, in the invention described in claim 4,
In the method for integrally forming a component of a pipe joint according to claim 3, the opposing walls of the first die (60A, 60B) are formed parallel to the die cutting direction of the second die (70), while The opposing walls of type 3 (80A, 80B) have locking pieces (5
0) is provided with a groove for accommodating the extending portion from the void (90) in an inclined shape, and in the process of forming the void (90), the opposing wall of the first mold (60A, 60B) and the third mold ( 80A,
It is characterized in that the intermediate portion of the locking piece (50) is liquid-tightly sandwiched by each cavity side end of the groove portion of (80B).

Further, in the invention described in claim 5,
The integral molding method of the component member in the pipe joint according to claim 3, wherein the opposing walls of the third mold (80A, 80B) are:
The locking piece (50) is formed so as to be inclined in the inclination direction, while
The opposing wall of the first type (60A, 60B) is the locking piece (50).
The groove portion for accommodating the extending portion from the empty space (90) in an inclined shape is provided, and the groove portion of the first mold (60A, 60B) and the third mold (80A, 80) in the process of forming the empty space (90).
It is characterized in that the intermediate portion of the locking piece (50) is liquid-tightly sandwiched by each space side end portion of the facing wall of (B).

Further, in the invention described in claim 6,
A female pipe member (10) provided at one end of both fluid pipes (P1, P1) and a male side provided at the other pipe end and fitted into the female pipe member (10). Pipe member (20)
And a first fixing member (30A) formed of a resin material in a substantially semi-cylindrical shape. Together with these members, both pipes (P
1. A second member which is a component forming a pipe joint connecting P1, P1) and which is formed of the resin material in a substantially semi-cylindrical shape.
The fixing member (40A) is hinged to the circumferential one side end of the first fixing member (30A) facing the one circumferential end, and is a pipe member together with the first fixing member. The second fixing member (4) that holds (10, 20) from the outer peripheral side.
0A) and a locking piece (50) made of an elastic plate material inserted at the base into the other circumferential end of the second fixing member, the other circumferential side of the first fixing member (30A). And a locking piece (50) provided at an end portion and extending in the direction of a locking hole portion (34) opening toward the other end in the circumferential direction of the second fixing member (40A). A first fixing member (3
0A) the engaging hole (34) has a claw (3
A locking hole portion (53) for locking the locking piece (5) is formed, and the tip portion (52) of the locking piece (50) is curved so as to easily ride on the claw (35), and the second fixing member is formed. (40
The insertion direction of the locking piece (50) with respect to the other end in the circumferential direction of (A) is such that the tip end (52) side of this locking piece is located at its base (5).
Provided is a component of a pipe joint that is inclined so as to be positioned radially outward of the second fixing member (40A) with respect to the 1) side.

The reference numerals in parentheses of the above-mentioned respective constituent elements show the corresponding relationship with the concrete constituent elements described in the embodiments described later.

[0032]

In the invention according to any one of claims 1 and 2, which is configured as described above, the locking piece has its tip end side more outward than the base side in the radial direction of the second fixing member. The second fixing member is inclined and inserted into the other end portion in the circumferential direction of the second fixing member so as to be positioned. As a result, even though the locking piece has a curved structure, a component member (locking piece) having a good releasability without interfering with the first die at the time of mold release in the integral molding process is provided, and A pipe joint that can connect both pipes can be provided.

According to the third aspect of the invention, the first, second and third molds are combined to form a substantially semi-cylindrical cavity corresponding to the shape of the second fixing member. In the formation process, the tip end side of the locking piece is tilted so as to be positioned more radially outward of the cavity than the base side thereof, and the base of the locking piece is in the circumferential direction of the second fixing member in the cavity. In a state where it is inserted into a portion corresponding to a side end portion, the intermediate portion of the locking piece is liquid-tightly held by the space-side end portions of the opposing walls of the first and third molds,
In addition, the resin is injected into the cavity and solidified to integrally mold the second fixing member and the locking piece.

Therefore, after the second fixing member and the locking piece are held in the first mold after such integral molding, the second and third molds are separated from the first mold, and then, the first mold. Even if the second fixing member and the locking piece are separated from each other, the tip of the locking piece is
It moves along the opposite wall of the mold without interfering with it.
Therefore, the tip of the locking piece does not rub against the first-type opposing wall to damage it. This gives the first type of quality,
The life and good releasability can be properly maintained.

Further, as described above, the tip end side of the locking piece is tilted so as to be positioned more radially outside the cavity than the base side thereof, and the base of the locking piece is the second fixing member having the cavity. In the state of being inserted into a portion corresponding to the other side end portion in the circumferential direction, the intermediate portion of the locking piece is liquid-tightly held by the space side end portions of the facing walls of the first and second molds. Therefore, in the process of injecting the resin into the void, the resin does not enter between the opposing walls. As a result, the resin does not adhere to portions other than the insert portion of the locking piece into the fixing member.

According to the fourth aspect of the present invention, in the process of forming the cavity, the first mold facing wall and the third mold facing wall are formed in parallel with the die cutting direction of the second mold. The intermediate portion of the locking piece is liquid-tightly sandwiched by the respective hollow-side end portions of the groove portion. Further, according to the invention of claim 5, in the process of forming the void, each void of the groove portion formed in the opposing walls of the third mold and the first mold that is inclined in the inclination direction of the locking piece. The side end portion holds the intermediate portion of the locking piece in a liquid-tight manner.

As a result, the same function and effect as those of the invention of claim 3 can be achieved. According to the invention as set forth in claim 6, the component member constituting the pipe joint for connecting both the pipes together with the female pipe member, the male pipe member and the first fixing member,
The second fixing member and the locking piece are the same as the second fixing member and the locking piece described in claim 1. With this, it is possible to provide the component member including the second fixing member suitable for use in the pipe joint according to the first aspect and the locking piece integrally formed with the second fixing member.

[0038]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to. FIG. 1 shows a main part of the pipe joint according to the present invention shown in FIG. 2, and FIG. 3 shows a refrigeration circuit adopting the pipe joint according to the present invention. In this refrigeration circuit, the compressed refrigerant from the compressor 100 via both pipes P1 is condensed by the condenser 110 and supplied into the receiver 120 via both pipes P2, and the refrigerant from this receiver 120 is passed through the capillary tube 130 to the evaporator. It is configured to supply 140.

The pipe joints are both pipes P2, P2 of the refrigeration circuit.
This pipe joint is used as a joint of
In the pipe joint shown by 0, both fixing members 30A and 40A are adopted in place of both fixing members 30 and 40, which is a characteristic of the configuration. The male-side joint 10 and the female-side joint 20 are coaxially formed integrally with the upstream and downstream pipes P2 and P2.

The fixing member 30A is the above-mentioned fixing member 30.
In this embodiment, a square annular locking hole 34 is provided instead of the locking hole 32, and the other structure of the fixing member 30A is the same as that of the fixing member 30. On the other hand, the fixing member 40A
In the above-described fixing member 40, a rectangular parallelepiped locking portion 43 is provided in place of the locking portion 42. The other structure of the fixing member 40A is the same as that of the fixing member 40.

The locking hole portion 34 of the fixing member 30A opens in the circumferential direction toward the locking portion 43 as shown in FIG. 1, and the radially inner wall of the locking hole portion 34 has A claw 35 having a right-angled triangular cross section is formed to project. This nail 3
As shown in FIG. 1, the inclined wall 35a of No. 5 is formed so as to be higher toward the left side in the drawing.
The right hem of a has a locking hole portion 34 of a locking piece 50 described later.
In order to facilitate insertion into the inside, the locking hole portion 34 on the left side of the inclined wall 35a extends more gently outward than the radially outer inner wall portion.

In the locking portion 43 of the fixing member 40A, the locking piece 50 is insert-molded at its base portion 51 at the other end in the circumferential direction of the fixing member 40A when integrally molding the fixing member 40A with resin. The extension angle α (see FIG. 1) of the base 51 of the locking piece 50 from the end surface 43a of the fixing member 40A is set to a predetermined angle slightly larger than 90 degrees. However, this predetermined angle α is set by the mold or the locking piece 50 when integrally molding the fixing member 40A and the locking piece 50 as described later.
It has been selected so as not to damage the.

In the pipe joint constructed as described above,
Both fixing members 30A and 40A sandwich the male-side joint 10 and the female-side joint 20 fitted coaxially with each other from the radial direction. Then, in the process of pinching in this way, the locking piece 50 has the inclined wall 35a of the claw 35 at its tip portion 52.
While climbing up, it is inserted into the locking hole 34 (see FIGS. 4 and 1). As a result, the claw 35 is locked in the locking hole portion 53 of the locking piece 50, and the two fixing members 30A and 40A are fixed to each other.

Next, a molding method for integrally insert-molding the fixing member 40A together with the locking piece 50 will be described with reference to FIGS. First, a mold apparatus S1 having a sectional shape as shown in FIG. 5 is prepared. This mold device S1 is the same as the mold device S described above except that the core mold 60 is used.
Further, the structure is characterized in that the slide mold 80 is replaced with a core mold 60A and a slide mold 80A.

The core mold 60A, the cavity mold 70, and the slide mold 80A are in a combined state shown in FIG. 5, and have a substantially semi-cylindrical space in cross section corresponding to the shape of the fixing member 40A (the shape of the fixing member 40). Since it is similar to a hollow space having a substantially semi-cylindrical cross section corresponding to
Moreover, the insert molding position of the locking piece 50 with respect to the space 90 is liquid-tightly positioned.

The core mold 60A has a recess 60a similar to the core mold 60 described above, but the facing wall 63 of the recess 60a against the slide mold 80A is different from the core mold 60 in the moving direction of the cavity mold 70. It is parallel to.
On the other hand, unlike the case of the slide mold 80 described above, the facing wall 82 of the slide mold 80A with respect to the core mold 60A is a flat surface parallel to the facing wall 63, and the groove portion 82a is formed in the facing wall 82 as described above. It is formed at a position corresponding to the groove 81c.

As shown in FIG. 5, the bottom wall of the groove portion 82a is inclined from the inner side toward the opening side at the predetermined angle α. In this case, the predetermined angle α is the slide type 80.
It is based on the plane including the right side wall of A in the figure. Also,
The depth of the opening end of the groove portion 82a is equal to the plate thickness of the locking piece 50, and the width of the groove portion 82a is equal to the width of the locking piece 50. Then, when the core mold 60A, the cavity mold 70, and the slide mold 80A are put in the combined state shown in FIG. 5 as described above, the space of the locking piece 50 housed in the groove portion 82a as shown in the drawing. The insert molding position is positioned with respect to 90. At this time, the locking piece 50 is inclined along the bottom wall of the groove portion 82a at the above-described predetermined angle α, and the vacant space 90 (the portion corresponding to the locking portion 43) at the base end portion 51 thereof.
It extends inside (see FIGS. 5 and 6). Therefore, the intermediate portion of the locking piece 50 is liquid-tightly held between the end of the facing wall 63 of the core die 60A and the open end of the groove 82A of the slide die 80A. Thereby, the void 90 and the groove 82a
Communication with is cut off. In addition, the tip portion 52 of the locking piece 50
Corresponds to an intermediate portion of the facing wall 63 of the recess 60a of the core mold 60A.

When resin is injected from the injection device into the void 90 in such a state, the injected resin fills the entire void 90 and the retaining hole 54 of the locking piece 50. At this time, as described above, the vacant space 90
Since the communication between the groove and the groove portion 82a is blocked, the space 90
The resin inside does not leak into the groove portion 82a. After that, when the injected resin in the space 90 solidifies, the fixing member 40
When the integral molding of the resin of A is completed, the locking piece 5
At the same time, the insert molding of the fixing member 40A of 0 is completed.

Then, as shown in FIG. 7, when the cavity die 70 is moved to the right, the fixing member 40A is moved to the right along the guide rail while being held by the core die 60A, and the core die 60A is moved. Separate from. Along with this, the slide die 80A moves downward along the guide pin 71. Then, as shown in FIG. 8, after the cavity mold 70 is further separated from the core mold 60A, both rods 62 of the core mold 60A are pushed rightward in the figure by the driving means to move the fixing member 40A from the core mold 60A. Push out.

Then, the locking piece 50 follows the fixing member 40A and is pulled out from the recess 60a along the facing wall 63 of the core mold 60A. At this time, the locking piece 50 has the tip portion 52.
Is firmly supported by the locking portion 43 of the fixing member 40A in a state where it is brought into contact with the intermediate portion of the facing wall 63, but since the facing wall 63 is a flat surface, the tip portion of the locking piece 50 is formed. The reference numeral 52 moves parallel to the facing wall 63 without rubbing it. Therefore, the movement of the tip portion 52 of the locking piece 50 does not damage the facing wall 63 of the core die 60A.

As described above, since the facing surface 63 of the core mold 60A is formed by the flat surface, after the insert molding of the locking piece 50 to the fixing member 40A, these are formed.
When pushed out from 0A, the tip portion 52 of the locking piece 50 moves parallel to the facing surface 63. Therefore, the tip portion 52 does not interfere with the facing surface 63, and the facing surface 63 is not rubbed and scratched. As a result, the core mold 6
OA quality, releasability and life can be properly maintained.

Further, since the bottom wall of the groove portion 82a of the slide die 80A is inclined at the predetermined angle α as described above, the locking piece 5 is formed in the process of molding the fixing member 40A.
The intermediate portion of 0 is liquid-tightly held between the end of the facing wall 63 of the core die 60A and the open end of the groove 82A of the slide die 80A. Therefore, during the process of injecting the resin into the space 90, the resin does not enter the groove portion 82A.
As a result, the resin does not adhere to portions other than the insert portion of the locking piece 50 into the fixing member 40A.

A modification of the above embodiment will be described with reference to FIG. 9. In this modification, a core mold 60 is used instead of the core mold 60A and the slide mold 80A described in the above embodiment.
B, the adoption of the slide type 80B is characteristic in its configuration. Unlike the core mold 60A, the facing wall 64 of the core mold 60B with respect to the slide mold 80B is configured by a flat surface inclined at the predetermined angle α as shown in FIG. A groove 64a for accommodating the locking piece 50 is formed in the facing wall 64 at a position corresponding to the groove 82a described above. As shown in FIG. 9, the groove portion 64a is parallel to the moving direction of the cavity mold 70 on the bottom wall thereof, and the depth of the opening end of the groove portion 64a is equal to the plate thickness of the locking piece 50. The width of the groove 64a is equal to the width of the locking piece 50. The predetermined angle α is based on the plane including the right side wall of the slide die 80B in the drawing.

On the other hand, the facing wall 83 of the slide mold 80B with respect to the core mold 60B is an inclined flat surface which is parallel to the facing wall 64, unlike the above-described slide mold 80A. Then, the core mold 60B and the cavity mold 70
When the slide mold 80B is placed in the combined state shown in FIG. 9, the insert molding position is positioned with respect to the space 90 of the locking piece 50 housed in the groove 64a as shown in the drawing. At this time, the locking piece 50 has the groove 6
Along the both edges of the opening 4a, it is inclined at the above-mentioned predetermined angle α and extends into the void 90 (a portion corresponding to the locking portion 43) at the base end portion 51 thereof. Therefore, the intermediate portion of the locking piece 50 is liquid-tightly held by the groove 64a of the core die 60B and the opposing wall 64 of the slide die 80B. As a result, the communication between the void 90 and the groove 64a is blocked. Further, the tip portion 52 of the locking piece 50 is in contact with the inner portion of the bottom wall of the groove portion 64a of the core die 60B.

With the modified example configured as described above, it is possible to achieve the same effect as that of the above-described embodiment. In implementing the present invention, the present invention is not limited to both pipes of the refrigeration circuit, and may be applied to implement both pipes for various fluids to be connected to each other. Further, in carrying out the present invention, the shapes of the respective facing surfaces of the core type and the slide type are not limited to those of the above-described embodiments and modified examples, and the locking pieces are provided at the ends of the facing surfaces on the vacant space 90 side. As long as the intermediate portion of 50 can be sandwiched in a liquid-tight manner and in an inclined shape, it may be appropriately modified and implemented.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of both fixing members and locking pieces in an embodiment of a pipe joint according to the present invention.

FIG. 2 is a perspective view showing a state in which both fixing members are opened in an embodiment of the pipe joint according to the present invention.

FIG. 3 is a schematic perspective view of a refrigeration circuit for applying the pipe joint of FIG.

FIG. 4 is a cross-sectional view showing an operational relationship between a locking piece and a fixing member of FIG.

5 is a cross-sectional view of a mold device for insert-molding a locking piece on the fixing member of FIG.

6 is a partial side view seen from the arrow B in FIG.

7 is a cross-sectional view showing a state in which the core mold, the cavity mold, and the slide mold of the mold device of FIG. 5 have begun to be separated with the insert molding of the locking piece to the fixing member.

FIG. 8 is a cross-sectional view showing a state in which the core member, the cavity mold, and the slide mold of the mold device of FIG.

FIG. 9 is a cross-sectional view of a mold device showing a modified example of the above embodiment.

FIG. 10 is a perspective view of a pipe joint proposed prior to the present invention.

FIG. 11 is a side view of the pipe joint.

FIG. 12 is a cross-sectional view of a mold device for insert molding of a fixing member and a locking piece that form the pipe joint of FIG.

13 is a cross-sectional view showing a state where the core mold, the cavity mold, and the slide mold of the mold device of FIG. 12 have begun to be separated along with insert molding of the locking piece to the fixing member.

14 is a cross-sectional view showing a state where the core mold, cavity mold, and slide mold fixing member and the locking piece of the mold device of FIG. 12 are pushed out from the core mold.

FIG. 15 is a partial side view seen from the arrow A in FIG.

[Explanation of symbols]

10 ... Male side joint, 20 ... Female side joint, 30A, 4
OA: fixing member, 31, 41 ... hinge portion, 34
... Locking holes, 35 ... Claws, 43 ... Locking parts, 5
0 ... Locking piece, 51 ... Base part, 52 ... Tip part,
53 ... Locking hole portion, 60A ... Core type, 63, 8
2, 83 ... Opposing surface, 64a, 82a ... Groove part,
70 ... cavity type, 80A ... slide type, 9
0 ... Vacancy, P1 ... Piping.

Claims (6)

[Claims] 1. A pipe joint for connecting both fluid pipes, wherein a female pipe member is provided at one end of both pipes, and a female pipe member is provided at the other pipe end and fitted into the female pipe member. A male side pipe member to be joined with the male side pipe member and first and second first and second pipe members which are formed of a resin material in a substantially semi-cylindrical shape and sandwich the both pipe members from the outer peripheral side under hinge coupling at one end portion in the circumferential direction facing each other. And a locking hole portion that opens toward the other circumferential end of the second fixing member is provided at the other circumferential end of the first fixing member. A claw is projectingly provided on the outer inner wall of the locking hole, and the elastic plate material is inserted into the other end of the second fixing member in the circumferential direction at the base and extends toward the locking hole. The engaging piece is formed with an engaging hole portion that engages with the claw, and The tip end of the locking piece is curved so that it can easily ride on the pawl, and the insertion direction of the locking piece with respect to the other end in the circumferential direction of the second fixing member is such that the tip end side of this locking piece is the base part. A pipe joint, which is inclined so as to be positioned more radially outward of the second fixing member than the side. 2. The locking piece has a tip portion curved in a protruding direction of the claw, and a locking hole portion of the locking piece is formed adjacent to the tip portion. The pipe joint according to claim 1. 3. A first die for punching out a concave side outer shape of the second fixing member and a convex side outer shape of the second fixing member in a direction opposite to a die cutting direction of the first die. A third die, and a portion of the second fixing member into which the locking piece is inserted is die-cut in a direction opposite to the one end in the circumferential direction from the other end in the circumferential direction of the second fixing member. By combining with a mold, a substantially semi-cylindrical cavity corresponding to the shape of the second fixing member is formed, and in this forming process, the tip end side of the locking piece is closer to the cavity than the base side. The first portion is tilted so as to be positioned outward in the radial direction, and the base portion of the locking piece is inserted into a portion of the void corresponding to the other circumferential end portion of the second fixing member. And an intermediate portion of the locking piece is liquid-tightly sandwiched by the cavity side end portions of the respective opposing walls of the third mold, and resin is poured into the cavity. Integrally forming method of the component in the pipe joint according to any one of claims 1 and 2 clotted characterized by integrally molding the second fixing member and the locking piece with. 4. An opposing wall of the first die is formed parallel to the die cutting direction of the second die, while an opposing wall of the third die is a portion of the locking piece extending from the cavity. Is provided in a slanted shape, and in the process of forming the cavity, the middle portion of the locking piece is liquid-tightly sealed by the cavity-side ends of the first type facing wall and the third type groove portion. 4. The method for integrally forming a component member in a pipe joint according to claim 3, wherein the component member is integrally clamped. 5. A third-type opposing wall is formed so as to be inclined in the inclination direction of the locking piece, while a first-type opposing wall is a portion of the locking piece extending from the void. A groove portion for accommodating the inclined portion, and in the process of forming the void, the groove portion and the third groove of the first type are provided.
4. The method for integrally forming component members in a pipe joint according to claim 3, wherein an intermediate portion of the locking piece is liquid-tightly sandwiched by each cavity side end portion of the facing wall of the mold. 6. A female side pipe member provided at one end of both fluid pipes, a male side pipe member provided at the other end of the pipes and fitted to the female side joint member, and a resin. A first fixing member formed of a material in a substantially semi-cylindrical shape, and a constituent member that forms a pipe joint that connects the two pipes together with these members, and is formed of the resin material in a substantially semi-cylindrical shape. The second fixing member is hinged to the circumferential one side end of the second fixing member facing the circumferential one end, and the first fixing member and the both pipe members are joined together. A second fixing member that is sandwiched from the outer peripheral side, and a locking piece made of an elastic plate material that is inserted at the base into an end portion on the other side in the circumferential direction of the second fixing member, the circumferential direction of the first fixing member. The second fixing member is provided at the other end and opens toward the other end in the circumferential direction of the second fixing member. A locking piece extending in the direction of the stop hole portion, wherein the locking piece has a locking hole portion for locking a claw protruding from an outer inner wall of the locking hole portion of the first fixing member. In addition, the tip of the locking piece is curved so as to easily ride on the claw, and the insertion direction of the locking piece with respect to the other end in the circumferential direction of the second fixing member is the locking direction. A constituent member of a pipe joint, which is inclined so that a tip end side of the piece is located more radially outward of the second fixing member than a base side thereof.