JP2008275079A - Component to be mounted on pipe, and pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a component and a pipe joint to be mounted on a pipe, which can reduce a discarded amount and can be continuously used as a pipe cover. <P>SOLUTION: The pipe joint 40 is arranged on the outer periphery sides of an end 22 of a first pipe 2 and an end 32 of a second pipe 3 for protecting the ends 22, 32. The pipe joint 40 comprises a cylindrical part 41 to be arranged on the outer periphery sides of the end 22 of the first pipe 2 and the end 32 of the second pipe 3, a first inside collar portion 41a formed at one axial end of the cylindrical part 41 so as to be locked to a pipe enlarging portion 34 and a tapered face 35 formed at the ends 22, 32 of the pipes 2, 3, and a tying part 44 removably provided on an end plate 43 which can cover a through-hole 45 formed in the other axial end of the cylindrical part 41. Thus, a discarded amount can be reduced and continuous use is enabled. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a part that is attached to a pipe such as a protective plug that covers an end of the pipe, and a pipe joint that protects the end of two connected pipes. For example, the refrigerant of a refrigeration cycle for vehicle air conditioning It is suitable for use in a piping joint device for piping.

  Conventionally, as this type of protective plug, for example, the one shown in Patent Document 1 is known. That is, a protective plug having an end plate that covers the open end is attached to the end of the pipe so that dust, dirt, moisture, or the like does not enter the pipe from the end of the pipe. A groove and a recess are formed in the end plate that covers the open end so that the fluid in the pipe can escape to the outside when the pressure in the pipe rises. The protective plug has a shape that is in close contact with the pipe end made of resin in order to protect the end of the pipe and to apply a gripping force so that it is not easily detached from the pipe end.

In general, a pipe joint device for a vehicle air-conditioning refrigeration cycle includes a pipe having a female joint part and a pipe having a male joint part in order to form a refrigeration cycle. Therefore, protective plugs having different shapes for covering respective end portions of the female side joint portion and the male side joint portion are prepared.
Japanese Patent Laid-Open No. 10-231986

  By the way, the protective plug having the shape as in Patent Document 1 is not formed so as to be reusable. That is, at least two types of protective plugs, a male side protective plug and a female side protective plug, are provided, and the end of each pipe is connected when the end of the other side pipe is connected to the end of one pipe. The protective plug is removed from the factory and disposed of. As a result, the burden of disposal costs is a problem.

  Further, when used in an environment with a lot of dust, a separate dustproof cover for covering the outer shape of the connecting portion is required for the connecting portion where the ends of the pipes are connected to each other. Thereby, there is a problem that the number of components increases and the cost increases.

  Therefore, an object of the present invention is to provide a “part to be attached to a pipe” and a “pipe joint” that can be used continuously as a pipe cover while reducing the amount of waste. Another object of the present invention is to provide a “part to be attached to a pipe” and a “pipe joint” that can be used in a dusty environment.

  In order to achieve the above object, the present invention employs the following technical means. That is, in the first aspect of the present invention, the cylindrical portion (41) disposed on the outer peripheral side of the end portions (22, 32) of the pipe (2, 3) and one axial end of the cylindrical portion (41) A first inner flange portion (41a) which is formed on the outer peripheral side projection portion (34, 35) formed on the end portion (22, 32) of the pipe (2, 3), and the tubular portion An end plate (43) that covers the openings (45, 46) formed at the other axial end of (41) and is detachably provided at the other axial end of the tube (41). It is characterized by comprising.

  According to this invention, when connected to other pipes, the end plate (43) is removed from the cylindrical part (41), so that the cylindrical part (41) can be continuously used as a protective member for the connected pipe. It becomes possible. Moreover, since the part to be discarded is only the end plate (43), the amount of discarded can be reduced.

  In the invention according to claim 2, the cylindrical portion (41) includes a plurality of partial bodies (41e, 41f) extending along the axial direction, and is configured to be deployable along a deployment surface passing through the shaft. It is characterized by. According to the present invention, the parts to be attached to the pipe can be easily attached to the pipe (2, 3). Moreover, it can be removed easily.

  In the third aspect of the present invention, the end plate (43) is integrally formed with one of the partial bodies (41e, 41f) via the breakable connecting portion (44), and the connecting portion ( 44) is broken, and the end plate (43) can be removed from the cylindrical portion (41).

  According to the present invention, the end plate (43) can be easily formed on the partial bodies (41e, 41f), and the end plate (43) can be easily removed from the partial bodies (41e, 41f). is there.

  The invention according to claim 4 is characterized in that the end plate (43) is separate from the cylindrical portion (41) and is detachable from the cylindrical portion (41). According to this invention, the end plate (43) can be easily attached to and detached from the partial bodies (41e, 41f).

  In the invention according to claim 5, each of the partial bodies (41e, 41f) corresponds to the outer shape of the end portions (22, 32) of the pipes (2, 3) to which the cylindrical portions (41) are attached. An approximately semi-cylindrical fitting portion (42) is formed.

  According to this invention, it becomes possible to reliably cover the end portions (22, 32) of the pipes (2, 3) connected to each other by the partial bodies (41e, 41f). The ends (22, 32) of the pipes (2, 3) can be protected.

In invention of Claim 6, it arrange | positions at the outer peripheral side of the edge part (22) of 1st piping (2), and the edge part (32) of 2nd piping (3), and end part (22, 32) is made. In the pipe joint (40) to protect,
The pipe joint (40) includes a cylindrical part (41) disposed on the outer peripheral side of the end part (22) of the first pipe (2) and the end part (32) of the second pipe (3), and the cylindrical part ( 41), which is formed at one end in the axial direction and is engaged with the outer peripheral projection (34, 35) formed at the end (22, 32) of the pipe (2, 3). A detachable portion (44, 41d) that can remove the end plate (43) that can cover the opening (45, 46) formed at the other axial end of the cylindrical portion (41). It is characterized by having.

  According to the present invention, when the first and second pipes (2, 3) are connected to each other, the end plate (43) is removed from the removal part (44, 41d), so that the cylinder part (41) is left as it is. It can be continuously used as a protective member for the connected pipe. Moreover, since the part to be discarded is only the end plate (43), the amount of discarded can be reduced.

  In the invention according to claim 7, the cylindrical portion (41) includes a plurality of partial bodies (41e, 41f) extending along the axial direction, and is configured to be deployable along a deployment surface passing through the shaft. It is characterized by. According to this invention, the cylinder part (41) of the pipe joint (40) can be easily attached to the first and second pipes (2, 3) by the partial bodies (41e, 41f). Moreover, it can be removed easily.

  In the invention according to claim 8, the end plate (43) is formed integrally with one of the partial bodies (41e, 41f) via the breakable connecting portion (44), and the connecting portion ( 44) is broken, and the end plate (43) can be removed from the cylindrical portion (41).

  According to this invention, the end plate (43) can be easily formed on the partial body (41e, 41f) of the pipe joint (40), and the end plate (43) can be easily formed on the partial body of the pipe joint (40) ( 41e, 41f).

  The invention according to claim 9 is characterized in that the end plate (43) is separate from the cylindrical portion (41) and is detachable from the cylindrical portion (41). According to the present invention, the end plate (43) can be easily attached to and detached from the partial bodies (41e, 41f) of the pipe joint (40).

  In the invention according to claim 10, each of the partial bodies (41e, 41f) corresponds to the outer shape of the end portion (22, 32) of the pipe (2, 3) to which the cylindrical portion (41) is attached. An approximately semi-cylindrical fitting portion (42) is formed.

  According to this invention, it becomes possible to reliably cover the ends (22, 32) of the pipes (2, 3) connected to each other by the partial bodies (41e, 41f) of the pipe joint (40). The ends (22, 32) of the pipes (2, 3) after being connected to can be protected.

In invention of Claim 11, the edge part (22) of 1st piping (2) is formed as a male side coupling part (22), and the edge part (32) of 2nd piping (3) is male side. It is formed as a female side joint part (32) into which the joint part (22) is inserted, arranged on the outer peripheral side of the first pipe (2), and the first pipe (2) is inserted and connected to the second pipe (3). The first pipe (2) has a locking member (10) that maintains the connection state so that the first pipe (2) does not come off from the second pipe (3). The locking member (10) In a state before the side joint portion (22) is inserted and connected to the female side joint portion (32), it is held on the outer peripheral side of the end portion (22) of the first pipe (2),
The pipe joint (40) is held on the outer peripheral side of the end part (32) of the second pipe (3) before the male side joint part (22) is inserted and connected to the female side joint part (32). It is characterized by having.

  According to the present invention, the first and second pipes (2, 3) are easily interconnected and the first pipe (2) can be disconnected from the second pipe (3). And the pipe joint (40).

In invention of Claim 12, the edge part (22) of 1st piping (2) is formed as a male side coupling part (22), and the edge part (32) of 2nd piping (3) is male side. It is formed as a female side joint part (32) into which the joint part (22) is inserted, arranged on the outer peripheral side of the first pipe (2), and the first pipe (2) is inserted and connected to the second pipe (3). The first pipe (2) has a locking member (10) that holds the connection state so that the first pipe (2) does not come off from the second pipe (3). The locking member (10) In a state before the joint portion (22) is inserted and connected to the female side joint portion (32), it is held on the outer peripheral side of the end portion (22) of the first pipe (2),
The pipe joint (40) is connected to the end of the first pipe (2) so as to cover the locking member (10) before the male joint part (22) is inserted and connected to the female joint part (32). It is characterized by being held on the outer peripheral side of the portion (22).

  According to this invention, the pipe joint (40) is in the state before the male side joint part (22) is inserted and connected to the female side joint part (32), and the end part (22) of the first pipe (2). This is different from the invention of claim 11 in that it is held on the outer peripheral side, and the same effect as that of claim 11 can be obtained.

  In invention of Claim 13, a pipe joint (40) is formed in the other axial direction edge part in a cylinder part (41), and is latched by the axial rear end part of a latching member (10). It has the 2nd inner side collar part (41b), It is characterized by the above-mentioned. According to this invention, it is suppressed by the locking member (10) and the pipe joint (40) that the first pipe (2) is detached from the second pipe (3).

  In the invention according to claim 14, the length (L1) of the first and second inner flanges (41a, 41b) formed at both axial ends of the cylindrical portion (41) is the first In the state where the end (22) of the pipe (2) is inserted and connected to the end (32) of the second pipe (3), the outer peripheral side formed at the end (32) of the second pipe (3) It corresponds to the length from the protrusions (34, 35) to the rear end of the locking member (10).

  According to this invention, it is possible to reliably cover the end portions (22, 32) of the first and second pipes (2, 3) connected to each other by the cylindrical portion (41) of the pipe joint (40). Thus, the ends (22, 32) of the first and second pipes (2, 3) after being connected to each other can be protected.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment mentioned later.

(First embodiment)
Components mounted on the pipe according to the first embodiment will be described with reference to FIGS. In the present embodiment, as a part to be mounted on a pipe, a part used as a pipe joint that protects at least the joint part as well as a protective cap that protects an end part of the pipe is described. . FIG. 1 is a longitudinal sectional view showing a mounted state in which a component is mounted on a pipe of a female side joint as a protective cap. FIG. 2 is a longitudinal sectional view showing the overall configuration of the pipe joint. 3 is a view taken in the direction of arrow III shown in FIG. FIG. 4 is a perspective view showing a developed state of the pipe joint, in other words, an open state.

  FIG. 5 is a longitudinal sectional view showing a state before the connection of the female joint pipe and the male joint pipe. FIG. 6 is a longitudinal sectional view showing the overall configuration of the pipe joint device. 5 and 6 show a state in which the parts are mounted as pipe joints. FIG. 7A and FIG. 7B are perspective views showing the external shape of the locking member. In the following description, the component 40 is referred to as a pipe joint 40.

  The pipe joint 40 can be applied to, for example, a pipe joint device used for connecting refrigerant pipes in a vehicle air conditioning refrigeration cycle. In a vehicle air conditioner, refrigeration equipment such as a compressor, an evaporator, a liquid receiver, and a condenser are connected by a refrigerant pipe (hereinafter referred to as a pipe) to constitute a refrigeration cycle in which the refrigerant circulates.

  When shipping an air conditioner from a factory, the refrigeration cycle is divided into parts (each refrigeration equipment), and each refrigeration equipment and piping are connected when mounted on a car. For example, refrigerant pipes are connected to each other by a pipe joint device including a pipe 2 having a male side joint, a pipe 3 having a female side joint, and a locking member 10 for locking the pipes 2 and 3. is doing.

  The pipe joint 40 is incorporated into the pipe joint device. When shipping from the factory with the pipe joint device divided, install the pipe joint 40 as a cap or plug at the end of the pipe to prevent dust, dirt, or moisture from entering the pipe from the end of the pipe. The end opening of the pipe is covered (FIG. 1).

  And, when mounting on the vehicle, when connecting the end of the counterpart pipe to the end of the pipe, at least the end plate 43 that covers the end opening is removed from the pipe joint 40 so that the counterpart pipe can be connected. (Fig. 2). Thus, when the pipe is a single product, the pipe joint 40 has a function of closing the end opening of the pipe and a function of protecting the outer periphery of the end of the pipe. In other words, the pipe joint 40 functions as a protective cap for the pipe end.

  Further, the pipe joint 40 has a function of protecting the outer shape of the connecting portion even after the pipes are connected. In other words, the pipe joint 40 functions as a pipe cover for the connection portion. Thereby, the outer periphery of the connection part of piping can be protected by removing only the end plate 43 which covers end part opening, without providing the protective component which protects the joint part of piping separately.

  As shown in FIGS. 5 and 6, the pipe joint device includes a first pipe 2 having a male side joint part 22, a second pipe 3 having a female side joint part 32, a first pipe 2 and a second pipe 3. It comprises a locking member 10 to be locked, and a pipe joint 40 attached to the outer periphery of the end of the pipe to which the male and female joint parts 22, 32 are connected.

  In the pipe joint device, the male side joint part 22 is inserted into the female side joint part 32 to connect the first pipe 2 and the second pipe 3. A locking member 10 is mounted on the outer peripheral side of the first pipe 2, and is configured to lock the first pipe 2 and the second pipe 3 via the locking member 10.

  The first pipe 2 is formed in a cylindrical shape for circulating the refrigerant, and a male joint portion 22 having a diameter larger than that of the cylindrical portion 21 is formed at the insertion-side distal end portion. The male side joint portion 22 is formed with two rows of annular concave groove portions 23 into which the O-ring 5 made of a rubber material is inserted. On the opposite end side of the concave groove 23, that is, at the root portion of the male joint portion 22 (between the concave groove 23 and the cylindrical portion 21), an expanded portion 24 protruding outward is formed.

  The expanded portion 24 is formed in a substantially cylindrical shape whose outer shape is expanded outward, and the step surface between the cylindrical portion 21 and the expanded portion 24 disposed on the rear side of the expanded portion 24 is a locking member. It forms as the 1st to-be-latched part 26 latched with the 10 latching | locking parts 14. FIG. An end surface on the front side of the expanded portion 24 is in contact with a root portion of the expanded portion 34 formed in the second pipe 3. On the outer peripheral surface of the expansion portion 24, a non-illustrated anti-rotation portion for achieving the anti-rotation function between the second pipe 3 and the first pipe 2 is formed.

  The cylinder portion 21 on the rear side of the expanded portion 24 is formed with a restraining portion 21b made of a concave groove portion. The restraining portion 21 b is a groove for positioning the locking member 10 when the locking member 10 is mounted on the outer periphery of the first pipe 2. That is, when connecting the first pipe 2 and the second pipe 3, a stopper function for preventing the locking member 10 mounted on the outer periphery of the first pipe 2 from shifting to the rear side of the cylindrical portion 21. Have.

  On the other hand, the second pipe 3 is formed in a cylindrical shape for circulating the refrigerant, and a female side joint portion 32 having a diameter larger than that of the cylindrical portion 31 is formed at the distal end portion on the insertion side. The female joint portion 32 includes an insertion port 33 for fitting the male side joint portion 22 of the first pipe 2, a pipe expansion portion 34 having a diameter larger than that of the insertion port 33, and a forward extension from the pipe expansion portion 34. An extended cylindrical portion 37 is formed. The insertion port 33 is an inner peripheral surface for sealing the male joint portion 22.

  The expansion portion 34 is formed so as to fit into the expansion portion 24, and a rotation prevention portion (not shown) for performing a rotation prevention function between the second pipe 3 and the first pipe 2 is provided on the inner peripheral surface thereof. Is formed. A conical tapered surface 35 is formed on the base side of the expanded portion 34 and connected to the distal end of the insertion port 33. The tapered surface 35 is in contact with the distal end side of the expanded portion 24.

  The extended cylinder part 37 is extended and extended outwardly from the expanded pipe part 34, and the distal end of the extended cylinder part 37 is bent toward the inner peripheral side so that the inner peripheral surface of the extended cylinder part 37 is recessed from the concave groove part. An inner diameter step portion 38 is formed. The inner diameter stepped portion 38 is fitted with the locking portion 14 of the locking member 10. The tip end side of the inner diameter step portion 38 is formed so as to contact the second contact portion 14 a of the locking portion 14.

  When the first pipe 2 and the second pipe 3 are connected, that is, when the expanded portion 24 comes into contact with the tapered surface 35 of the expanded portion 34, the locking portion 14 of the locking member 10 has an inner diameter stepped portion 38. The inner diameter stepped portion 38 is formed as a concave groove so that it can be fitted inside.

  The insertion port 33, the tapered surface 35, the pipe expansion part 34, and the inner diameter step part 38 are formed by plastic working such as pipe expansion on the distal end side of the cylindrical part 31. Here, in the inner diameter step portion 38 of the present embodiment, the concave groove portion is formed over the entire circumference of the inner peripheral surface of the extending cylindrical portion 37. However, the present invention is not limited to this, and a partially concave groove portion may be formed. good.

  Next, the locking member 10 is attached to the outer periphery on the side opposite to the tip of the expanded portion 24 formed in the first pipe 2. The locking member 10 is formed of a resin material that allows elastic displacement. The locking member 10 may be integrally formed of a metal material or a combination of a resin material and a metal material.

  The locking member 10 is coaxially formed with respect to the first pipe 2 and the second pipe 3, and the inner peripheral side of the extended cylinder part 37 of the second pipe 3 and the cylinder part 21 of the first pipe 2. It is arrange | positioned in the clearance gap between the outer peripheral side (FIG. 6). As shown in FIGS. 7A and 7B, the locking member 10 includes a locking portion 14 that locks the inner diameter step portion 38 and the expanded portion 24, and the locking portion 14 in the radial direction. An elastic displacement part 13 for elastically displacing the first pipe 2 and a pipe mounting part 12 for mounting the locking member 10 on the outer peripheral surface of the first pipe 2 are configured.

  A plurality of (two in this example) locking portions 14 are formed at positions (point-symmetric positions) facing the axis CL. The number of the locking portions 14 is set according to the pressure in the piping. In the present embodiment, the pair of locking portions 14 facing the axis CL are formed as a set, but a plurality of sets of locking portions 14 are dispersed in the circumferential direction, for example, etc. It may be arranged at intervals.

  A convex first contact portion 14 e is formed on the distal end side of the locking portion 14. The first contact portion 14 e is locked to the first locked portion 26 formed in the expanded portion 24. A linear second contact portion 14a is formed on the other axial end opposite to the first contact portion 14e, and the second contact portion 14a is formed on the second pipe 3. The inner diameter step portion 38 is locked at the tip.

  In other words, the first contact portion 14e, which is one end surface, is locked to the first locked portion 26 of the first pipe 2 and the second end surface, which is the other end surface, at both axial end surfaces of the locking portion 14. The contact portion 14 a is locked to the inner diameter step portion 38 of the second pipe 3.

  Further, after the first pipe 2 and the second pipe 3 are connected, when the fluid is enclosed in the first and second pipes 2 and 3 and the internal pressure rises, the first and second pipes 2 and 2 are caused by the internal pressure. 3, a force acts in a direction away from the joint part on the connection counterpart side (withdrawal direction). As a result, the second contact portion 14 a comes into contact with the tip of the inner diameter step portion 38 and is locked to the inner diameter step portion 38.

  Moreover, the latching | locking part 14 is formed as a circular-arc-shaped protruding part curved in the circumferential direction. The locking portion 14 is formed in a rectangular or substantially trapezoidal shape in the axial cross section, and is formed with a tapered surface portion 14b. The outer peripheral surface connected to the tapered surface portion 14b is formed as a cylindrical surface. Has been.

  Further, the step surface formed on the inner peripheral surface of the distal end of the locking portion 14 constitutes a first abutting portion 14 e and is locked to the first locked portion 26 formed on the expanding portion 24. The Further, the end surface formed on the rear end surface of the locking portion 14 constitutes the second contact portion 14 a and is locked to the tip of the inner diameter step portion 38 of the second pipe 3.

  As described above, one end (first contact portion 14e) of the locking portion 14 is locked to the expanded portion 24, and the other end (second contact portion 14a) is locked to the tip of the inner diameter step portion 38. Thus, the first pipe 2 and the second pipe 3 can be connected. Further, since the tapered surface portion 14 b is provided at the tip of the locking portion 14, the diameter of the locking portion 14 can be reduced at the tip of the extended cylindrical portion 37 when the first pipe 2 is inserted into the second pipe 3. The locking member 10 can be smoothly inserted into the inner peripheral side of the extended cylindrical portion 37.

  The pipe mounting portion 12 of the locking member 10 is formed in a substantially C-shaped cylindrical shape, and is mounted on the outer periphery of the first pipe 2 while being elastically displaced. By being formed in a substantially C-shaped and thin cylindrical shape, when being mounted on the outer periphery of the first pipe 2, the substantially C-shaped opening can be opened and mounted from the side of the first pipe 2.

  Further, the pipe mounting portion 12 is formed with a plurality of claw portions 12 a that are engaged with a restraining portion 21 b formed in the cylindrical portion 21 of the first pipe 2 by bending toward the inner peripheral side of the pipe mounting portion 12. . Further, a rear end portion 12 b is formed at the rear end of the pipe mounting portion 12.

  The elastic displacement portion 13 connects the rear end portion 12b of the pipe mounting portion 12 and the locking portion 14 and is formed so as to elastically displace the locking portion 14 in the radial direction. The elastic displacement portion 13 is formed so that one end thereof extends radially outward from the rear end of the pipe mounting portion 12 and extends in a U-turn in the axial direction, and the tip thereof is connected to the locking portion 14. Yes.

  The thickness of the elastic displacement portion 13 is sufficiently smaller than the thickness of the locking portion 14. Therefore, even if it is formed of the same resin material, it has sufficient flexibility in the radial direction, and the locking portion 14 is configured to be elastically displaceable in the radial direction. A pair of elastic displacement portions 13 are formed so as to face the axis CL of the pipe mounting portion 12 at symmetrical positions.

  By the way, since the locking member 10 is rotatably mounted on the first pipe 2 and the second pipe 3, the male side joint part 22 and the female side joint part 32 are relatively rotatable, There is a possibility that accompanying rotation may occur in either the first pipe 2 or the second pipe 3. In order to prevent this rotation, the outer peripheral surface of the male joint portion 22 is fitted to the inner peripheral surface of the female joint portion 32, for example, the outer peripheral surface of the expansion portion 24 of the first pipe 2 and the second portion. An anti-rotation portion (not shown) is formed at a site where the inner peripheral surface of the pipe expansion portion 34 of the pipe 3 is fitted.

  The pipe joint device including the pipe joint 40 is shipped in a divided state when shipped from the factory. The pipe joint 40 is mounted so as to cover the end part (female side joint part 32) of the second pipe 3 at the time of shipment. The pipe joint 40 has a bottomed cylindrical shape, and has a shape that can be broken and developed in half along the axial direction. The pipe joint 40 is integrally formed by molding a resin material. The pipe joint 40 can also be manufactured using a metal material or a material in which a resin material and a metal material are combined.

  The pipe joint 40 includes a cylindrical portion 41 as a cylindrical portion and an end plate 43 that covers one end portion thereof. The pipe joint 40 includes two partial bodies 41e and 41f extending along the axial direction. Each partial body 41e, 41f has a semi-cylindrical shape obtained by dividing the cylindrical portion 41 along a dividing plane passing through the axis. Each partial body 41e, 41f has a semi-cylindrical shape. These partial bodies 41 e and 41 f are connected by a hinge portion 47.

  The cylindrical portion 41 is configured to be deployable along a split surface passing through the axis so as to expose the inner surface thereof. Instead of the cylindrical portion 41, a cylindrical portion having a shape such as a polygonal column shape can be employed. Moreover, the cylindrical part 41 can be comprised by the some partial body obtained by dividing | segmenting the said cylindrical part 41 into several along the some division surface which passes along an axis | shaft.

  On one inner side of each of the partial bodies 41e and 41f, a first inner flange that is locked to a pipe expanding portion 34 and a tapered surface 35 (corresponding to an outer peripheral projection) formed at the end of the second pipe 3 is provided. A portion 41a is formed. Similarly, when the first and second pipes 2 and 3 are connected to the other axial ends of the partial bodies 41e and 41f, they are locked to the axial rear end 12b of the locking member 10. A second inner flange 41b is formed.

  And the fitting part for including the edge part (female side joint part 32) of the 2nd piping 3 inside the cylindrical part 41 between these 1st and 2nd inner side collar parts 41a and 41b 42 is formed. The fitting portion 42 is formed by a substantially semi-cylindrical groove corresponding to the outer shape of the end portion (female side joint portion 32) of the second pipe 3. The axial length L1 of the fitting portion 42 (that is, the distance between the first and second inner flanges 41a and 41b) is the first pipe 2 at the end of the second pipe 3 (female side joint portion 32). When the end portion (male side joint portion 22) is connected, the end portion (male side joint portion 22) of the first pipe 2 including the locking member 10 and the end portion (female side joint portion) of the second pipe 3 are connected. 32).

  That is, when the end part (male side joint part 22) of the first pipe 2 is connected to the end part (female side joint part 32) of the second pipe 3, the locking member 10 attached to the first pipe 2 The dimension is set so as to include the outer shape portion extending from the rear end side to the base side of the expanded portion 34 of the second pipe 3. An inner diameter D1 of one through hole 45 formed at one end of the fitting portion 42 is set to be approximately the same as the outer diameter of the cylindrical portion 21 of the first pipe 2.

  The inner diameter D2 of the other through hole 46 is set to be approximately the same as the outer diameter of the insertion port 33 of the second pipe 3. The end plate 43 is formed on one end surface of the cylindrical portion 41 so as to cover the one through hole 45. The end plate 43 is formed in a circular shape that is substantially the same as the outer shape of the cylindrical portion 41. The end plate 43 is formed integrally with the end surface of the cylindrical portion 41 via a connecting portion 44. The end surface of the end plate 43 other than the connecting portion 44 is formed so as to contact the end surface of the cylindrical portion 41. The connecting portion 44 is a detachable portion that allows the end plate 43 to be removed.

  That is, when the partial bodies 41e and 41f are opened, the end plate 43 is disposed on one end face of the divided partial bodies 41e and 41f. And when the partial bodies 41e and 41f close, it arrange | positions so that the through-hole 45 may be covered with the end plate 43. FIG. Here, the end plate 43 is connected to one end face of the cylindrical portion 41 via the connecting portion 44. However, the end plate 43 can be removed from the cylindrical portion 41 by applying an external force in the direction of the arrow shown in FIG. it can.

  The hinge portion 47 is formed of a thin plate so as to connect the divided partial bodies 41e and 41f and to have a hinge function. The handle portion 48 is a handle for opening when the divided bodies 41e and 41f are closed, and is provided on one of the divided partial bodies 41e and 41f. The handle portion 48 is provided with a convex portion 48a for fixing the other partial bodies 41e and 41f when the divided partial bodies 41e and 41f are closed.

  The other partial bodies 41e and 41f are provided with a concave portion 49 at a position corresponding to the convex portion 48a. When the divided partial bodies 41e and 41f are closed, the divided partial bodies 41e and 41f are fixed by engaging the convex portion 48a with the concave portion 49. And by applying external force to the handle part 48, the engagement between the convex part 48a and the concave part 49 is released, and the divided partial bodies 41e and 41f can be opened.

  Next, a method for assembling the pipe joint device having the above-described configuration, that is, a method for assembling the pipe joint 40 to the second pipe 3 when piping or the like is shipped from the factory, is based on FIG. 1, FIG. 5, and FIG. I will explain. First, as shown in FIG. 1, the pipe joint 40 is mounted so as to cover the outer peripheral part and the end opening of the end part (female side joint part 32) of the second pipe 3. That is, while the divided partial bodies 41e and 41f are opened, the outer periphery of the insertion port 33 of the second pipe 3 is fitted into the one fitting part 42, and the outer periphery of the insertion port 33 of the second pipe 3 is fitted. Is fitted into the through hole 46.

  Then, the opened partial bodies 41e and 41f are closed, and the convex portion 48a is engaged with the concave portion 49 (state shown in FIG. 1). Thereby, the end part (female side joint part 32) of the second pipe 3 is covered with the pipe joint 40. Dust and water resistance can be achieved without dust, dirt, or moisture entering the second pipe 3 from the outside.

  Since the outer peripheral portion of the end portion (female side joint portion 32) of the second pipe 3 is covered and included by the cylindrical portion 41, the outer peripheral portion can be protected so as not to be damaged or deformed from the outside. it can. Furthermore, the second pipe 3 can be stored in a state in which the pipe joint 40 is attached to the end portion (female side joint portion 32) of the second pipe 3.

  And when it mounts in a vehicle and connects with the other party piping, before inserting the 1st piping 2 in the 2nd piping 3 in the state which attached the piping joint 40 to the 2nd piping 3, as shown in FIG. The end plate 43 is detached from the connecting portion 44 and removed. Therefore, the connection part 44 is formed so that it can be broken by the operator's force. The removed end plate 43 is discarded. Thereby, the through-hole 45 opens.

  Next, the handle portion 48 is operated to disengage the convex portion 48a and the concave portion 49, and the partial bodies 41e and 41f are opened in a half-cracked state. And the 1st piping 2 with which the latching member 10 was mounted | worn by the rear end side of the expansion part 24 of the 1st piping 2 is arrange | positioned before the edge part opening of the 2nd piping 3. FIG. Then, the male side joint part 22 of the first pipe 2 is moved in the direction of the arrow shown in FIG. 5, and the male side joint part 22 is inserted into the extended cylinder part 37.

  As a result, the distal end of the male side joint portion 22 is inserted into the insertion port 33 of the second pipe 3. At this time, since the tapered surface portion 14b of the locking portion 14 is pressed at the tip of the extended cylindrical portion 37, the locking portion 14 is reduced in diameter in the axial direction.

  Then, the distal end side of the expanded portion 24 is inserted into the expanded portion 34. At the same time, the locking portion 14 is inserted into the inner peripheral side of the extended cylindrical portion 37. When the distal end side of the expanded portion 24 comes into contact with the root portion of the expanded tube portion 34, the locking portion 14 is elastically restored and fitted and locked in the inner diameter stepped portion 38.

  And if the 1st piping 2 is pulled to the left side (disconnection direction) from this state, the inner wall face of the 1st contact part 14e of the latching | locking part 14 will be in the 1st to-be-latched part 26 of the expansion part 24. Locked. In addition, the second contact portion 14a of the locking portion 14 is locked to the tip of the inner diameter step portion 38, and the first and second pipes 2 and 3 are restrained in the axial direction, so that the first pipe 2 and the second pipe 3 are connected. Thus, the 1st piping 2 and the 2nd piping 3 can be connected by one-touch via the locking member 10. FIG.

  Next, the partial bodies 41 e and 41 f opened in a half-cracked state are closed, and the convex portion 48 a of the handle portion 48 is engaged with the concave portion 49. The axial length L1 of the fitting portion 42 is from the rear end side of the locking member 10 attached to the first pipe 2 to the root side of the expanded portion 34 of the second pipe 3 as described above. It is set to a dimension that can cover the joint part that leads to. That is, the fitting part 42 is formed corresponding to the external shape of the connection part (10, 22, 32).

  For this reason, for example, when the locking portion 14 is not correctly fitted in the inner diameter step portion 38, the rear end side of the locking member 10 protrudes outward from the fitting portion 42, and The convex portion 48 a cannot engage with the concave portion 49. In other words, if the connection between the first pipe 2 and the second pipe 3 is poor, the pipe joint 40 cannot cover the connecting portions (10, 22, 32).

  On the other hand, when the partial bodies 41e and 41f opened in a half-cracked state can be closed, as shown in FIG. 6, the engaging member 10 is connected to the fitting portion 42 in the axial length L1. The pipe joint 40 can correctly cover the connection parts (10, 22, 32) between the end part (male side joint part 22) of the first pipe 2 and the end part (female side joint part 32) of the second pipe 3. it can. Therefore, the quality of the connection between the first pipe 2 and the second pipe 3 can be determined.

  Here, the length L1 in the axial direction of the fitting portion 42 includes the outer shape extending from the rear end side of the locking member 10 attached to the first pipe 2 to the root side of the expanded portion 34 of the second pipe 3. However, the present invention is not limited to this, and the length L1 of the fitting portion 42 in the axial direction is extended from the rear end side of the locking member 10 attached to the first pipe 2 to the second pipe 3. You may set to the dimension which can include the external shape part which reaches to the base side of the installation cylinder part 37. FIG.

  According to the pipe joint 40 according to the first embodiment described above, the end plate 43 covering the through holes 45 formed in the partial bodies 41e and 41f of the cylindrical portion 41 is formed so as to be removable, and the end plate 43 is removed. Even after connecting the first pipe 2 to the second pipe 3, the pipe joint 40 can be continuously used as a protective cover for the connecting portions (10, 22, 32). Thereby, the amount of waste of the pipe joint 40 can be reduced.

  Thus, even after connecting the first pipe 2 to the second pipe 3, the pipe joint 40 is configured as a protective cover that covers the connection parts (10, 22, 32), so that the connection parts (10, 22, In addition to the dustproof and waterproof function in 32), damage from the outside of the outer shape of the connecting portion (10, 22, 32) such as scratches or dents can be prevented. In addition, it can be used in a dusty environment without providing a separate dustproof cover.

  Moreover, by forming the partial bodies 41e and 41f of the pipe joint 40 into a half-cracked shape that can be opened and closed, the shape of the fitting portion 42 can be formed according to the outer shape of the connection portion (10, 22, 32). In addition, since the end plate 43 is formed integrally on the end surfaces of the partial bodies 41e and 41f via the connecting portion 44, only the end plate 43 can be easily attached with the pipe joint 40 attached to the second pipe 3. Can be removed. The removal mark of the connecting portion 44 can be formed small.

(Second Embodiment)
In the first embodiment described above, the pipe joint 40 is configured to be attached to the second pipe 3 having the female side joint part 32, but is configured to be attached to the first pipe 2 having the male side joint part 22. You may do it. FIG. 8 is a longitudinal sectional view showing a mounting state in which the pipe joint is attached to the pipe of the male side joint. As shown in FIG. 8, the pipe joint 40 of the present embodiment is provided with a removable end plate 43 so as to cover the through hole 46.

  That is, the end plate 43 is provided outside the through hole 46 that fits the outer diameter of the insertion port 33 of the second pipe 3 among the through holes 45 and 46 formed at both ends of the fitting portion 42. Similarly to the first embodiment, the axial length L1 of the fitting portion 42 is such that the end portion of the first pipe 2 (male side joint portion 32) is connected to the end portion of the second pipe 3 (female side joint portion 32). When the portion 22) is connected, it is possible to include the end portion of the first pipe 2 (male side joint portion 22) including the locking member 10 and the end portion of the second pipe 3 (female side joint portion 32). I am doing it.

  The pipe joint 40 covers the outer peripheral part and the end opening of the end part (male side joint part 22) of the first pipe 2 including the locking member 10 when the pipe joint apparatus is shipped from the factory in a divided state. To be fitted. Thereby, the end part (male side joint part 22) of the 1st piping 2 is covered with the piping joint 40, and dust prevention and waterproofing can be performed without dust or dirt or moisture entering the first piping 2 from the outside. .

  Since the outer shape of the end portion (male side joint portion 22) of the first pipe 2 is covered and included by the cylindrical portion 41, the outer shape of the end portion is protected so as not to be damaged or deformed from the outside. Can do. Furthermore, the 1st piping 2 can be stored in the state with which the piping joint 40 was mounted | worn with the edge part (male side joint part 22) of the 1st piping 2. FIG.

  And when connecting with the other side piping mounted in a vehicle, the end plate 43 is connected to the connecting portion 40 before connecting the second piping 3 to the first piping 2 with the piping joint 40 mounted on the first piping 2. Remove from 44. The removed end plate 43 is discarded. Thereby, the through-hole 46 opens.

  Next, the handle portion 48 is operated to disengage the convex portion 48a and the concave portion 49, and the cylindrical portion 41 is opened in a half-break state. Then, the male side joint part 32 of the second pipe 3 is moved to insert the male side joint part 22 into the extended cylinder part 37. Thereby, the 1st piping 2 and the 2nd piping 3 can be connected via the latching member 10 by one-touch.

  Then, the partial bodies 41e and 41f opened in a half-break state are closed, and the convex portion 48a of the handle portion 48 is engaged with the concave portion 49. As a result, the fitting portion 42 having the axial length L1 includes the locking member 10 and the end portion of the first pipe 2 (male side joint portion 22) and the end portion of the second pipe 3 (female side). Connection portions (10, 22, 32) with the joint portion 32) can be covered with the pipe joint 40.

  Thereby, in addition to the dustproof and waterproof function in the connection part (10, 22, 32), damage from the outside of the external shape in the connection part (10, 22, 32) such as scratches or dents can be prevented. . In addition, it can be used in a dusty environment without providing a separate dustproof cover.

(Third embodiment)
In the above embodiment, in the end plate 43 of the pipe joint 40, the end surface other than the connecting portion 44 is formed so as to contact the one end surface of the cylindrical portion 41, but a part of the outer periphery of the end plate 43 is formed on the cylindrical portion 41. You may form so that it may insert. FIG. 9 is a longitudinal sectional view showing the overall configuration of the pipe joint.

  As shown in FIG. 9, the pipe joint 40 of the present embodiment forms a groove 41 c into which a part of the outer periphery of the end plate 43 is inserted into one of the half-cracked partial bodies 41 e and 41 f. When the divided cylindrical portion 41 is closed, a part of the outer periphery of the end plate 43 on the opposite side of the connecting portion 44 is inserted into the groove portion 41c.

  According to the above configuration, the through hole 45 formed in the cylindrical portion 41 can be reliably covered with the end plate 43. Further, the end plate 43 can be detached from the connecting portion 44 and removed by opening the divided cylindrical portion 41.

(Fourth embodiment)
In the above embodiment, the removable end plate 43 is formed integrally with the pipe joint 40. However, the end plate 43 may be formed separately from the pipe joint 40 so that the end plate 43 can be attached and detached. 10 and 11 are longitudinal sectional views showing the entire configuration of the pipe joint. As shown in FIG. 10, one of the pipe joints 40 of the present embodiment has an end plate 43 that covers the through hole 45 formed separately from the pipe joint 40.

  A snap-like stopper 43 a is provided on one end surface of the end plate 43. The through hole 45 of the cylindrical portion 41 of the pipe joint 40 is provided with a receiving portion 41d corresponding to the stopper 43a. When the divided cylindrical portion 41 is closed, the through hole 45 can be covered by attaching the end plate 43 to the end surface of the through hole 45. Moreover, the end plate 43 can be removed from the pipe joint 40 by opening the divided partial bodies 41e and 41f.

  In addition, as shown in FIG. 11, another pipe joint 40 is formed by separately forming a cylindrical portion 41 and an end plate 43 of the pipe joint 40. A rivet-like stopper 43 a is provided on one end surface of the end plate 43. A receiving portion 41d corresponding to the stopper 43a is provided on one end face of the cylindrical portion 41. When the divided partial bodies 41e and 41f are closed, the through hole 45 can be covered by attaching the end plate 43 to the end surface of the through hole 45. Further, the end plate 43 can be removed from the pipe joint 40 by pulling out the stopper 43a from the receiving portion 41c. The receiving portion 41d is a detachable portion that allows the end plate 43 to be removed.

  According to the above configuration, it is possible to easily remove only the end plate 43 in a state where the pipe joint 40 is attached to one of the pipes 2 and 3 before connecting the pipes. In addition, the pipe joint 40 from which the end plate 43 has been removed can be continuously used as a protective cover for the connecting portions (10, 22, 32) even after the pipes are connected to each other. Thereby, the amount of waste of the pipe joint 40 can be reduced.

(Other embodiments)
In the above embodiment, as a use of a part to be mounted on a pipe, it is used as a pipe end protection cap when the pipe is a single product, and is applied to the pipe joint 40 used as a pipe cover of the connection part even after the pipes are connected to each other. However, in addition to such applications, the present invention may be applied to applications of a piping bracket or a piping clamp for supporting the piping joint 40 on the vehicle side. Further, marking may be applied to the outer peripheral surface of the pipe joint 40 to apply it to uses such as pipe identification display.

  In the above embodiment, although it applied to the refrigerant | coolant piping of the refrigerating cycle for vehicle air conditioning, it is applicable to piping which encloses fluid, without limiting to this.

It is a longitudinal cross-sectional view which shows the mounting state which mounted | wore the piping of the female side joint with the components with which the piping in 1st Embodiment is mounted | worn as a protective cap. It is a longitudinal section showing the whole pipe joint composition in a 1st embodiment. FIG. 3 is a view taken in the direction of arrow III shown in FIG. 2. It is a perspective view which shows the expansion | deployment state of the piping joint in 1st Embodiment. It is a longitudinal cross-sectional view which shows the state before the connection of piping of the female side joint and piping of a male side joint in 1st Embodiment. It is a longitudinal section showing the whole pipe joint device composition in a 1st embodiment. (A) And (b) is a perspective view which shows the external appearance shape of the latching member in 1st Embodiment. It is a longitudinal cross-sectional view which shows the mounting state which mounted | wore the piping of the male joint with the piping joint in 2nd Embodiment. It is a longitudinal cross-sectional view which shows the whole structure of the piping joint in 3rd Embodiment. It is a longitudinal section showing the whole pipe joint composition in a 4th embodiment. It is a longitudinal cross-sectional view which shows the whole structure of the piping joint in the modification of 4th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... 1st piping, piping 3 ... 2nd piping, piping 10 ... Locking member, connection part 22 ... Male side joint part, edge part, connection part 32 ... Female side coupling part, edge part, connection part 34 ... Expanding part (Outside protrusion)
35 ... Tapered surface (outer peripheral projection)
40 ... pipe joint 41 ... cylindrical part (cylinder part)
41a ... 1st inner side collar 41b ... 2nd inner side collar 41d ... Receiving part (removal part)
42 ... fitting part 43 ... end plate 44 ... connecting part (detaching part)
45, 46 ... through holes (openings)

Claims (14)

A pipe part (41) disposed on the outer peripheral side of the end part (22, 32) of the pipe (2, 3);
It is formed at one end in the axial direction of the cylindrical portion (41), and is locked to the outer peripheral projection (34, 35) formed at the end (22, 32) of the pipe (2, 3). A first inner collar (41a);
An end that covers the opening (45, 46) formed at the other axial end of the cylindrical portion (41) and is detachably provided at the other axial end of the cylindrical portion (41). A component mounted on a pipe, characterized by comprising a plate (43).   The said cylinder part (41) is provided with the some partial body (41e, 41f) extended along an axial direction, and is comprised so that expansion | deployment is possible along the expansion | deployment surface which passes along an axis | shaft. Parts to be mounted on the listed piping.   The end plate (43) is integrally formed with one of the partial bodies (41e, 41f) via a breakable connecting portion (44), and the connecting portion (44) is broken. The component mounted on the pipe according to claim 2, wherein the end plate (43) can be detached from the cylindrical portion (41).   The component to be mounted on a pipe according to claim 2, wherein the end plate (43) is separate from the cylindrical portion (41) and is detachable from the cylindrical portion (41). .   Each of the partial bodies (41e, 41f) is fitted in a substantially semi-cylindrical shape corresponding to the outer shape of the end portions (22, 32) of the pipes (2, 3) to which the cylindrical portion (41) is attached. The part to be attached to the pipe according to any one of claims 2 to 4, wherein a joint portion (42) is formed. In the pipe joint (40) disposed on the outer peripheral side of the end (22) of the first pipe (2) and the end (32) of the second pipe (3) and protecting the end (22, 32). ,
The pipe joint (40) includes an end (22) of the first pipe (2) and a cylinder (41) disposed on the outer peripheral side of the end (32) of the second pipe (3),
It is formed at one end in the axial direction of the cylindrical portion (41), and is latched by outer peripheral side protruding portions (34, 35) formed at the ends (22, 32) of the pipes (2, 3). A first inner collar (41a);
It has a removal part (44, 41d) which makes it possible to remove the end plate (43) which can cover the opening part (45, 46) formed in the other axial direction end part in the cylinder part (41). Piping joint.   The said cylinder part (41) is provided with the some partial body (41e, 41f) extended along an axial direction, and is comprised so that expansion | deployment is possible along the expansion | deployment surface which passes along an axis | shaft. The piping joint described.   The end plate (43) is integrally formed with one of the partial bodies (41e, 41f) via a breakable connecting portion (44), and the connecting portion (44) is broken. The pipe joint according to claim 7, wherein the end plate (43) can be detached from the cylindrical portion (41).   The pipe joint according to claim 7, wherein the end plate (43) is separate from the cylindrical part (41) and is detachable from the cylindrical part (41). Each of the partial bodies (41e, 41f) is fitted in a substantially semi-cylindrical shape corresponding to the outer shape of the end portions (22, 32) of the pipes (2, 3) to which the cylindrical portion (41) is attached. The pipe joint according to any one of claims 7 to 9, wherein a joint (42) is formed. The end (22) of the first pipe (2) is formed as a male joint (22),
The end (32) of the second pipe (3) is formed as a female side joint (32) into which the male side joint (22) is inserted,
When the first pipe (2) is disposed on the outer peripheral side of the first pipe (2) and the first pipe (2) is inserted and connected to the second pipe (3), the first pipe (2) is connected to the second pipe ( 3) It has a locking member (10) that maintains the connection state so as not to be disengaged from the locking member (10), and the male side joint portion (22) has the female side joint portion (32). In the state before being inserted and connected to the outer circumference of the end (22) of the first pipe (2),
The pipe joint (40) has an outer periphery of the end (32) of the second pipe (3) in a state before the male joint part (22) is inserted and connected to the female joint part (32). It is hold | maintained at the side, The piping coupling as described in any one of Claim 6 thru | or 10 characterized by the above-mentioned. The end (22) of the first pipe (2) is formed as a male joint (22),
The end part (32) of the second pipe (3) is formed as a female side joint part (32) into which the male side joint part (22) is inserted,
When the first pipe (2) is disposed on the outer peripheral side of the first pipe (2) and the first pipe (2) is inserted and connected to the second pipe (3), the first pipe (2) is connected to the second pipe ( 3) It has a locking member (10) that keeps the connected state so as not to come off from
The locking member (10) is in the state of the end (22) of the first pipe (2) before the male joint (22) is inserted and connected to the female joint (32). Held on the outer circumference,
The pipe joint (40) is configured to cover the locking member (10) before the male joint part (22) is inserted and connected to the female joint part (32). It is hold | maintained at the outer peripheral side of the edge part (22) of (2), The pipe joint as described in any one of Claim 6 thru | or 10 characterized by the above-mentioned.   The pipe joint (40) is formed at the other axial end of the tubular part (41), and is engaged with the axial rear end of the locking member (10). It has (41b), The pipe joint apparatus as described in any one of Claim 6 thru | or 12 characterized by the above-mentioned.   The length (L1) of the first and second inner flanges (41a, 41b) formed at both axial ends of the cylindrical part (41) is the end of the first pipe (2). In a state where the portion (22) is inserted and connected to the end (32) of the second pipe (3), the outer peripheral protrusion (34) formed on the end (32) of the second pipe (3). , 35) to the rear end of the locking member (10), the pipe joint according to claim 13.

Images