JP2021196055A - Conversion adapter - Google Patents

Abstract

To provide a conversion adapter easily coping with a pipe joint having a different configuration.SOLUTION: A conversion adapter 1 includes a cylindrical part 2 to be inserted into a joint part 11 provided in a pipe joint 10C, and a body part 3 connected to the cylindrical part 2 and configured differently from the joint part. The peripheral surface of the cylindrical part 2 is annularly provided with a first engaging groove 4a engaged due to insertion of a pipe slip-off prevention lock ring 12 provided in the joint part, and a seal surface 5 contacted with a pipe sealing seal ring 13 provided in the joint part. The conversion adapter includes a spacer 6A separated from the cylindrical part and the body part. The spacer is interposed between the pipe joint, and contacts and regulates an insertion position of the cylindrical part into the joint part.SELECTED DRAWING: Figure 1

Description

The present invention relates to a conversion adapter used to convert the structure of a pipe fitting.

Patent Document 1 discloses a joint for converting a pipe from an outer surface seal structure to an inner surface seal structure. As such a joint, there is also a conversion adapter (for example, "HJS type conversion adapter") shown in Non-Patent Document 1. The conversion adapter can be used for the first pipe joint of Non-Patent Document 2 (for example, "WH type double lock header") and the second pipe joint of Non-Patent Document 3 (for example, "AE type header"). Is.

FIG. 4 shows a state in which the conversion adapter 101 of Non-Patent Document 1 is used for the first pipe joint 10A of Non-Patent Document 2. The first pipe joint 10A is provided with a joint portion 11 at an end for connecting a resin pipe (not shown). The joint portion 11 has a well-known one-touch type joint structure, and has a lock ring 12 and a seal ring 13.

The metal lock ring 12 bites into the outer peripheral surface of the resin pipe inserted into the joint portion 11 to prevent the resin pipe from coming off. The seal ring 13 abuts on the outer peripheral surface of the resin pipe to ensure watertightness between the first pipe joint 10A and the resin pipe, and is in the insertion direction of the resin pipe (left-right direction on the paper surface). Two are provided along the line. The two seal rings 13 are arranged on the back side of the joint portion 11 with respect to the lock ring 12. The inner peripheral surface of the first pipe joint 10A is reduced in diameter on the inner side of the joint portion 11 with respect to the seal ring 13, and a contact surface 14 for abutting and defining the insertion position of the resin pipe is formed. ..

The conversion adapter 101 includes a tubular portion 2 for inserting into the joint portion 11 of the first pipe joint 10A, and a main body portion 3 having a joint structure that is connected to the tubular portion 2 and has a different joint structure from the joint portion 11. ing. The tubular portion 2 and the main body portion 3 are made of a metal such as brass or bronze. The main body portion 3 has an outer diameter larger than that of the tubular portion 2, and a sealing surface 3b is provided on the inner peripheral surface. A plug 20 having a seal ring 20b on the outer peripheral surface is inserted and connected to the main body 3. The plug 20 is prevented from being detached from the conversion adapter 101 by sandwiching the flange 20a of the plug 20 and the flange 3a of the main body 3 by the quick fastener 21.

The conversion adapter 101 is inserted into the first pipe joint 10A up to a position where the main body 3 abuts on the open end surface 15 of the joint 11. The tip portion 2a of the tubular portion 2 has tapered surfaces formed on the outer peripheral surface and the inner peripheral surface, and becomes thinner toward the tip. In the insertion direction of the tubular portion 2, the tip of the tubular portion 2 is located between the seal ring 13 on the inner side of the first pipe joint 10A and the contact surface 14.

A first engaging groove 4a, a second engaging groove 4b, and a sealing surface 5 are provided in an annular shape in the circumferential direction on the outer peripheral surface of the tubular portion 2. The first engaging groove 4a, the second engaging groove 4b, and the sealing surface 5 are located in this order from the main body portion 3 side toward the tip of the tubular portion 2. The lock ring 12 of the first pipe joint 10A is engaged with the second engaging groove 4b to prevent the conversion adapter 101 from coming off. The two seal rings 13 of the first pipe joint 10A are brought into contact with the seal surface 5 to ensure watertightness between the pipe joint 10A and the conversion adapter 101.

As described above, by inserting the conversion adapter 101 into the first pipe joint 10A and bringing the main body portion 3 into contact with the opening end surface 15 of the joint portion 11, the lock ring type joint portion 11 is quickly moved by the main body portion 3. Converted to a fastener type joint structure.

FIG. 5 shows a state in which the conversion adapter 101 of Non-Patent Document 1 is used for the second pipe joint 10B of Non-Patent Document 3. The second pipe joint 10B is a one-touch type pipe joint provided with a lock ring 12 and a seal ring 13, like the first pipe joint 10A, and has a substantially cylindrical outer cylinder portion 16 and an outer cylinder portion 16. A resin pipe is inserted between the inner cylinder portion 17 and the inner cylinder portion 17 formed inside the.

An insertion guide 18 that is pressed against the tip of the resin pipe to guide the insertion of the resin pipe is arranged between the outer cylinder portion 16 and the inner cylinder portion 17. At the back side of the seal ring 13 in the joint portion 11, the outer cylinder portion 16 and the inner cylinder portion 17 are connected to form a contact surface 14 for restricting the insertion position of the insertion guide 18. .. The insertion guide 18 pressed against the tip of the resin pipe abuts on the contact surface 14, thereby defining the insertion position of the resin pipe with respect to the second pipe joint 10B.

The second pipe joint 10B has a different configuration from the first pipe joint 10A, and the distance from the opening end surface 15 in the joint portion 11 to the lock ring 12 is larger than the distance in the first pipe joint 10A. Is also short. Therefore, in a state where the conversion adapter 101 is inserted into the second pipe joint 10B and the main body portion 3 is in contact with the open end surface 15 of the joint portion 11, the lock ring 12 is the first engagement groove 4a of the conversion adapter 101. Engage in.

That is, the conversion adapter 101 is provided with the first engaging groove 4a and the second engaging groove 4b to correspond to the first pipe joint 10A and the second pipe joint 10B having different configurations from each other.

Japanese Unexamined Patent Publication No. 2007-51699

Internet (Digital Catalog of Onda Seisakusho) <URL: https://www.catalabo.org/iportal/cv.do?c=53355740000&pg=73&v=CATALABO&d=link> Internet (Digital Catalog of Onda Seisakusho) <URL: https://www.catalabo.org/iportal/cv.do?c=53355740000&pg=62&v=CATALABO&d=link> Internet (Digital Catalog of Onda Seisakusho) <URL: https://www.catalabo.org/iportal/cv.do?c=53355740000&pg=65&v=CATALABO&d=link> Internet (Digital Catalog of Onda Seisakusho) <URL: https://www.catalabo.org/iportal/cv.do?c=53355740000&pg=120&v=CATALABO&d=link>

However, when the conversion adapter 101 is used for another pipe joint having a joint portion having a different configuration from that of the first pipe joint 10A and the second pipe joint 10B, the lock ring of the joint portion and the tubular portion 2 The positional relationship between the first engaging groove 4a and the second engaging groove 4b and / or the positional relationship between the seal ring of the joint portion and the sealing surface 5 of the tubular portion 2 is greatly deviated in the axial direction of the tubular portion 2. There was something. Therefore, a suitable engagement relationship between the lock ring and the first engagement groove 4a or the second engagement groove 4b cannot be realized, or a suitable contact relationship between the seal ring and the seal surface 5 cannot be realized. was there.

For example, FIG. 6 shows a state in which the conversion adapter 101 of Non-Patent Document 1 is used for the one-touch type third pipe joint 10C (for example, “socket”) of Non-Patent Document 4. When the conversion adapter 101 is used for a third pipe joint 10C having a configuration different from that of the first pipe joint 10A and the second pipe joint 10B, the lock ring 12 is engaged with the first engagement groove 4a. The second engaging groove 4b is arranged at the position of the seal ring 13 on the lock ring 12 side of the two seal rings 13, and the pipe sealing function is impaired. Therefore, for the third pipe joint 10C, for example, it was necessary to separately prepare another conversion adapter from which the engagement groove 4b was removed.

If the conversion adapter 101 (cylindrical portion 2) is made of soft resin, the lock ring 12 can be made to bite into the tubular portion 2, and the first engaging groove 4a or the second engaging groove 4b can be inserted. It is possible to prevent the conversion adapter 101 from coming off from the pipe joint even if the above is not provided.

However, it is difficult for the lock ring 12 to bite into the conversion adapter 101 (cylindrical portion 2) made of metal or hard resin. Therefore, it is necessary to adopt a configuration in which the engaging grooves 4a and 4b are provided in the cylindrical portion 2 and the lock ring 12 is inserted into the engaging grooves 4a and 4b.

An object of the present invention is to provide a conversion adapter that can be easily adapted to another pipe joint.

In order to achieve the above object, the invention of claim 1 is a main body having a tubular portion for inserting into a joint portion provided in a pipe joint and a main body connected to the tubular portion and having a configuration different from that of the joint portion. A conversion adapter provided with a portion, on the peripheral surface of the tubular portion, an engaging groove in which a lock ring for preventing the pipe from coming off of the joint portion is inserted and engaged, and a pipe included in the joint portion. In a conversion adapter in which a sealing surface to which a sealing ring for sealing is contact is provided in an annular shape in the circumferential direction, a spacer separate from the tubular portion and the main body portion is provided, and the spacer is the pipe joint. The insertion position of the tubular portion with respect to the joint portion is defined by being interposed between the two.

According to a first aspect of the present invention, the invention of claim 2 has a contact surface formed on the inner peripheral surface of the pipe joint for abutting and defining the insertion position of the pipe, and the spacer is formed on the cylindrical portion. It includes a small-diameter portion to be inserted and a large-diameter portion interposed between the tip of the tubular portion and the contact surface.

A third aspect of the present invention is the first aspect in which the spacer is interposed between the main body and the open end surface of the pipe joint. According to a third aspect of the present invention, the spacer has an annular shape into which the tubular portion is inserted, and the two corners located on the inner peripheral side of the spacer are in the radial direction rather than the axial direction. Has a long chamfer.

The conversion adapter of the present invention includes a spacer that is separate from the tubular portion and the main body portion. Therefore, the positional relationship between the lock ring of the joint portion and the engaging groove of the tubular portion and / or the positional relationship between the seal ring of the joint portion and the sealing surface of the tubular portion greatly deviates in the axial direction of the tubular portion. Even in this case, the insertion position of the tubular portion with respect to the pipe joint can be changed to a suitable position by interposing a spacer. That is, by attaching and detaching the spacer, it is possible to easily cope with another pipe joint.

The vertical sectional view which shows the state which connected the conversion adapter of 1st Embodiment to the 3rd pipe joint. The vertical sectional view which shows the state which connected the conversion adapter of 2nd Embodiment to the 3rd pipe joint. The vertical sectional view which shows the state which connected the conversion adapter of 3rd Embodiment to the 3rd pipe joint. A vertical sectional view showing a state in which a conventional conversion adapter is inserted into a first pipe joint. A vertical sectional view showing a state in which a conventional conversion adapter is inserted into a second pipe joint. A vertical sectional view showing a state in which a conventional conversion adapter is inserted into a third pipe joint.

Hereinafter, the first to third embodiments embodying the present invention will be described. (First Embodiment) As shown in FIG. 1, the conversion adapter 1 has the same configuration as the conventional conversion adapter 101 except that the spacer 6A is provided. The spacer 6A is provided separately from the tubular portion 2 and the main body portion 3, has an annular shape, and is interposed between the tip portion 2a of the tubular portion 2 and the contact surface 14 of the pipe joint 10C. There is.

The spacer 6A is formed with a small diameter portion 6a at the end on the side that comes into contact with the tubular portion 2, and a large diameter portion 6b is formed at the end on the side that comes into contact with the contact surface 14. The outer peripheral surface of the small diameter portion 6a has a shape along the inner peripheral surface of the tip portion 2a of the tubular portion 2. The large diameter portion 6b has an outer diameter larger than the inner diameter of the tubular portion 2 and smaller than the outer diameter of the tubular portion 2.

In the spacer 6A, the small diameter portion 6a is press-fitted into the tip portion 2a of the tubular portion 2, and the large diameter portion 6b is interposed between the tip portion 2a of the tubular portion 2 and the contact surface 14. There is. The tubular portion 2 inserted into the joint portion 11 has the tip of the tubular portion 2 in contact with the large diameter portion 6b, so that the insertion position into the joint portion 11 is defined as abutting. As a result, the lock ring 12 is displaced toward the opening end surface 15 as compared with the case where the spacer 6A is not provided, and is suitably engaged with the first engagement groove 4a, and both of the two seal rings 13 are sealed. A state of suitable contact with the surface 5 is provided.

In the above-mentioned first embodiment, the following effects are obtained. (1) The conversion adapter 1 includes a spacer 6A that is separate from the tubular portion 2 and the main body portion 3. Therefore, in the third pipe joint 10C, the positional relationship between the lock ring 12 of the joint portion 11 and the engaging grooves 4a and 4b of the tubular portion 2 and / or the seal ring 13 of the joint portion 11 and the seal of the tubular portion 2 Even if the positional relationship with the surface 5 deviates significantly from the first pipe joint 10A and the second pipe joint 10B (FIGS. 4 and 5) in the axial direction of the tubular portion 2, the spacer 6A is interposed. The insertion position of the tubular portion 2 with respect to the third pipe joint 10C can be changed to a suitable position. That is, by attaching and detaching the spacer 6A, it is possible to cope with pipe joints having various configurations.

(2) The spacer 6A is formed with a small diameter portion 6a that can be inserted into the tubular portion 2. Therefore, when the conversion adapter 1 is inserted into the pipe joint 10C, the spacer 6A can be inserted into the tubular portion 2 in an integrated state. This facilitates the work of interposing the spacer 6A between the pipe joint 10C and the conversion adapter 1.

(3) Since the spacer 6A is inserted inside the third pipe joint 10C, it cannot be visually recognized after being attached to the third pipe joint 10C. Therefore, after the conversion adapter 1 is attached to the pipe joints 10A to 10C, it is possible to prevent the conversion adapter 1 from being forcibly pulled out from the pipe joints 10A to 10C by determining that the spacer 6A is not attached. As a result, it is possible to prevent the conversion adapter 1 from being reinserted into the pipe joints 10A to 10C in a state where the lock ring 12 is deformed by pulling out the conversion adapter 1 and the retaining function is impaired.

(Second Embodiment) As shown in FIG. 2, this embodiment is an example in which the configuration (shape and mounting position) of the spacer 6A is changed to form the spacer 6B. The description of the same configuration as that of the first embodiment will be omitted.

As shown in FIG. 2, the spacer 6B has an annular shape and a quadrangular cross-sectional shape, and is interposed between the main body 3 of the conversion adapter 1 and the open end surface 15 of the pipe joint 10C. The tubular portion 2 is inserted into the pipe joint 10C through the spacer 6B.

In the second embodiment described above, the same effect as that of the first embodiment (1) is obtained, and since the spacer 6B is arranged outside the pipe joint 10C, it is determined that the spacer 6B is attached to the pipe joint. It has the effect of being visible even after being attached to the 10C.

(Third Embodiment) FIG. 3 shows a third embodiment. This embodiment is a modification of the spacer 6B of the second embodiment (referred to as “spacer 6C”). The spacer 6C is chamfered at all four corners 6c and 6d on the inner and outer circumferences of the spacer 6B. The chamfers of the two corners 6c located on the outer peripheral side have an angle of 45 degrees (so-called C chamfer). The chamfers of the two angles 6d located on the inner peripheral side have an angle of less than 45 degrees (preferably 20 to 40 degrees, more preferably 25 to 35 degrees). Therefore, the chamfers of the two corners 6d located on the inner peripheral side are longer in the radial direction (vertical direction in the drawing) than in the axial direction (horizontal direction in the drawing). Therefore, the spacer 6C reduces the inner diameter to near the outer diameter of the tubular portion 2 to suppress rattling on the tubular portion 2, while suppressing the boundary between the tubular portion 2 and the main body portion 3 in the conversion adapter 1. The curved surface located on the inner peripheral side can be suitably avoided by chamfering the angle 6d located on the inner peripheral side. Further, since the spacer 6C is chamfered at each of the two corners 6d located on the inner peripheral side, it is possible to eliminate the directionality when inserting the tubular portion 2, and the tubular portion 2 can be formed. It is also possible to prevent the sealing surface 5 of the tubular portion 2 from being scratched by rubbing against the corner 6d during insertion.

(Another example) The above embodiment can be changed as follows, for example. 〇 The spacer 6B of the second embodiment or the spacer 6C of the third embodiment may be used as a C ring. In this case, the spacers 6B and 6C can be attached even when the tubular portion 2 is inserted into the pipe joint 10C.

〇 With one engaging groove of the conversion adapter 1, a spacer different from the spacers 6A to 6C corresponds to the first pipe joint 10A or the second pipe joint 10B.

〇 Multiple spacers 6A to 6C should be interposed. By combining a plurality of spacers 6A to 6C, it is possible to cope with further another pipe joint. In this case, the spacers 6A to 6C may have different thicknesses from each other.

〇 The conversion adapter 1 shall be made of hard resin.

〇 The main body 3 of the conversion adapter 1 shall have a sealing plug configuration for stopping water.

〇 The main body 3 of the conversion adapter 1 shall have a one-touch joint structure with a nominal diameter different from that of the joint 11, and shall be configured for size conversion.

〇 The main body 3 of the conversion adapter 1 shall have an elbow joint configuration for converting the flow path direction.

〇 The main body 3 of the conversion adapter 1 shall have a branch joint configuration with a plurality of connection ports.

〇 The main body 3 of the conversion adapter 1 shall be configured for screw connection.

〇 The main body 3 of the conversion adapter 1 shall be configured for pipe type conversion as a joint structure corresponding to a pipe of a pipe type different from the resin pipe connected to the joint portion 11.

〇 The main body 3 of the conversion adapter 1 shall be equipped with a valve.

〇 The main body 3 of the conversion adapter 1 shall have an intake valve configuration for draining water.

1 ... Conversion adapter 2 ... Cylindrical part 3 ... Main body part 4a ... First engaging groove 4b ... Second engaging groove 5 ... Sealing surface 6A, 6B, 6C ... Spacer 6a ... Small diameter part 6b ... Large diameter part 6c, 6d ... angle 10 ... pipe joint 11 ... joint 12 ... lock ring 13 ... seal ring 14 ... contact surface 15 ... open end face

Claims (4)

A conversion adapter that includes a tubular portion for inserting into a joint portion provided in a pipe joint, and a main body portion that is connected to the tubular portion and has a joint configuration different from that of the joint portion or a sealing plug configuration. The peripheral surface of the tubular portion is in contact with an engaging groove in which the lock ring for preventing the pipe from coming off of the joint portion is inserted and engaged, and a seal ring for pipe sealing of the joint portion. In the conversion adapter in which the sealing surfaces are provided in an annular shape in the circumferential direction, a spacer separate from the tubular portion and the main body portion is provided, and the spacer is interposed between the pipe joint and the joint. A conversion adapter that specifies the insertion position of the tubular portion with respect to the portion. An abutting surface for defining the insertion position of the pipe is formed on the inner peripheral surface of the pipe joint, and the spacer has a small diameter portion inserted into the tubular portion and the tubular portion. The conversion adapter according to claim 1, further comprising a large-diameter portion interposed between the tip of the head and the contact surface. The conversion adapter according to claim 1, wherein the spacer is interposed between the main body and the open end surface of the pipe joint. 3. The spacer has an annular shape into which the tubular portion is inserted, and the two corners located on the inner peripheral side of the spacer are chamfered in a radial direction longer than the axial direction. Conversion adapter described in.

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