JP2015127553A - Piping connection fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost piping connection fitting having high productivity.SOLUTION: The piping connection fitting includes: a first annular part structured by bending a piece of wire rod and folding back the wire rod at one end side; a second annular part formed by folding back the wire rod at the other end side; and a center part connecting the first annular part and the second annular part. The first annular part and the second annular part are placed to face each other so that a pair of flanges are inserted into the insides of the first and second annular parts while the piping connection fitting is mounted on the pair of flanges. The wire rods intersecting with each other are engaged with each other at respective intersection parts of the first and second annular parts, to prevent the first and second annular parts from extending in the axis direction of the piping.

Description

  The present disclosure relates to a pipe connection fitting used for pipe connection.

  As a conventional pipe connection fitting, a pipe connection fitting formed of a metal elastic plate material is known (for example, refer to Patent Document 1).

  The pipe connection fitting (quick fastener) of Patent Document 1 is a substantially C-ring connecting member, and has an opening between tip portions and a hinge that is bent and formed in a U-shaped section at substantially equal intervals on the circumference. And a guide portion that is bent so as to spread outward at the opening. The both side walls of the pipe fitting of Patent Document 1 are formed with clamping holes that extend in the circumferential direction while avoiding the hinge portion.

  The pipe fittings of Patent Document 1 are fitted with pipe fittings (quick fasteners) so that both flanges are inserted into the clamping holes with the flanges provided at both ends of the pipes to be connected to each other. By doing so, the piping is connected and fixed.

JP 2005-188682 A

  However, since the conventional pipe connection fitting is formed by punching an elastic plate made of metal, the punched metal material has been discarded. Moreover, the conventional piping connection metal fitting is shape | molded using the metal mold | die. Therefore, in the conventional pipe connection fitting, in order to make a fitting according to the size of the pipe to be connected, a die for each size is required. As described above, the conventional pipe fitting has a problem that productivity is low and manufacturing cost is high.

  Therefore, an object of the present disclosure is to provide a pipe fitting having high productivity and low cost.

In order to achieve the above object, in the pipe fitting according to the present disclosure,
A pipe connection fitting for connecting a flange provided at the open end of one pipe and a flange provided at the open end of the other pipe,
The pipe connection fitting is composed of a single wire,
A first annular portion formed to bend so as to cross the wire on one end side;
A second annular portion formed to bend so as to cross the wire on the other end side;
A central portion of a wire rod, the central portion connected to the first annular portion and the second annular portion,
The first annular portion and the second annular portion are a pair of flanges inside the first annular portion and the second annular portion in a state where the pipe fitting is attached to the pair of flanges. Are placed opposite each other so that
The wires intersecting each other are engaged with each other at the intersecting portions of the first annular portion and the second annular portion, and the first annular portion and the second annular portion expand in the axial direction of the pipe. Suppress.

  According to the pipe fitting of the present disclosure, productivity can be increased and manufacturing cost can be reduced.

The perspective view of the pipe connection metal fitting of Embodiment 1 concerning this indication. Front view of the pipe fitting according to the first embodiment of the present disclosure. The right view of the piping connection metal fitting of Embodiment 1 concerning this indication. The perspective view of the state which attached the piping connection metal fitting of Embodiment 1 concerning this indication to piping. The perspective view of the modification of the piping connection metal fitting of Embodiment 1 concerning this indication. The perspective view of another modification of the pipe connection metal fitting of Embodiment 1 concerning this indication. The perspective view of another modification of the pipe connection metal fitting of Embodiment 1 concerning this indication. The perspective view of another modification of the pipe connection metal fitting of Embodiment 1 concerning this indication.

The pipe fitting of the first aspect according to the present disclosure is:
A pipe connection fitting for connecting a flange provided at the open end of one pipe and a flange provided at the open end of the other pipe,
The pipe connection fitting is composed of a single wire,
A first annular portion formed to bend so as to cross the wire on one end side;
A second annular portion formed to bend so as to cross the wire on the other end side;
A central portion of a wire rod, the central portion connected to the first annular portion and the second annular portion,
The first annular portion and the second annular portion are a pair of flanges inside the first annular portion and the second annular portion in a state where the pipe fitting is attached to the pair of flanges. Are placed opposite each other so that
The wires intersecting each other are engaged with each other at the intersecting portions of the first annular portion and the second annular portion, and the first annular portion and the second annular portion expand in the axial direction of the pipe. Suppress.

  With the pipe connection fitting according to the first aspect of the present disclosure configured as described above, it can be formed by bending a single wire. Therefore, the pipe fitting according to the first aspect of the present disclosure can increase productivity and reduce manufacturing costs.

  In the pipe connection fitting according to the second aspect of the present disclosure, the portion with which the wire in the first aspect engages is formed by bending the wire.

  In the pipe connection fitting according to the second aspect of the present disclosure configured as described above, the wires that cross each other at the intersection of the first annular portion and the second annular portion can be easily obtained by bending the wire. Can be engaged.

(Background to obtaining one form according to the present disclosure)
As described above, conventionally, an elastic plate made of a metal is punched to form a pipe connection fitting (quick fastener), so that the punched metal material is discarded. Furthermore, a complicated deburring process is required to remove the end face burrs generated by the punching.

  In addition, since the conventional pipe connection fitting is molded by a mold, a mold for each size is required to mold the pipe connection fitting according to the size of the pipe to be connected.

  In recent years, pipe fittings have been used in large quantities in cogeneration systems and the like, and cost reduction of pipe fittings has been demanded. Therefore, the present inventors have found the configuration of a pipe fitting that is formed of a metal wire, and have reached the present disclosure. With such a configuration, the pipe connection fitting of the present disclosure improves productivity and reduces manufacturing costs.

  Hereinafter, an embodiment according to the pipe fitting of the present disclosure will be described with reference to the accompanying drawings. In each drawing, each element is exaggerated for easy explanation. In the pipe connection fitting of the following embodiment, a specific configuration will be described, but the present disclosure is not limited to the specific configuration of the following embodiment, and the same technical idea Various pipe connection fittings to which the configuration based on the above is applied are included.

(Embodiment 1)
First, the pipe connection fitting according to the first embodiment will be described with reference to FIGS.

  FIG. 1 is a perspective view of the pipe fitting according to the first embodiment. FIG. 2 is a front view of the pipe connection fitting of the first embodiment. FIG. 3 is a right side view of the pipe connection fitting of the first embodiment. FIG. 4 is a perspective view of a state in which the pipe connection fitting of Embodiment 1 is attached to the pipe.

  As shown in FIGS. 1 to 3, the pipe connection fitting 10 of the first embodiment is configured by bending one wire. The pipe connection fitting 10 of Embodiment 1 includes a first annular portion 11 formed by bending one end of a wire, a second annular portion 12 formed by bending the other end of the wire, and a central portion of the wire. And the center part 13 which connects the 1st annular part 11 and the 2nd annular part 12 is provided.

  As shown in FIG. 4, the pipe fitting 10 according to the first embodiment includes a flange 15 a provided at the open end of one pipe 15 and a flange 16 a provided at the open end of the other pipe 16. In the face-to-face state, it is mounted and pipes are connected.

  The components of the pipe fitting according to the first embodiment will be described in detail.

<First annular portion>
The first annular portion 11 is formed by bending a portion on one end side with respect to the central portion of one wire. The first annular portion 11 is formed so that the central portion side wire 11a and the one end side wire 11b intersect each other at the one end side of the wire. At the intersecting portion of the first annular portion 11, the wire 11b on one end side is formed so as to pass on the inner side (the side where the pipe exists) than the wire 11a on the center portion side. Further, at the intersection, the central portion side wire 11a and the one end side wire 11b are formed to engage with each other. Here, engaging means that the first annular portion 11 is caught so as to be restricted from opening in at least one direction of the pipe axis direction 17. The pipe fitting 10 of the first embodiment suppresses the first annular portion 11 from expanding in the axial direction of the pipe shaft 17 by the engagement of the wire 11a on the center portion side and the wire 11b on the one end side. ing. In addition, the engaging portion between the wire 11a on the center portion side and the wire 11b on the one end side may restrict the first annular portion 11 from expanding in the other direction, not limited to the pipe axis direction 17.

<Second annular portion>
The second annular portion 12 is formed by bending a portion on the other end side with respect to the central portion of one wire. The second annular portion 12 is formed such that the central portion side wire 12a and the other end side wire 12b intersect at the other end portion of the wire. At the intersecting portion of the second annular portion 12, the wire rod 12 b on the other end side is formed so as to pass through the inner side (the side where the pipe exists) than the wire rod 12 a on the center portion side. Further, at the intersecting portion, the central portion side wire 12a and the other end side wire 12b are formed to engage with each other. The pipe fitting 10 according to the first embodiment suppresses the second annular portion 12 from expanding in the axial direction of the pipe shaft 17 by the engagement of the wire 12a on the center portion side and the wire 12b on the other end side. doing. Further, the engagement portion between the wire 12a on the center portion side and the wire 12b on the other end side may restrict the second annular portion 12 from expanding in the other direction as well as the direction of the pipe shaft 17. .

  The width of the inner region of the first and second annular portions 11 and 12 (the length in the short direction in FIG. 3) is substantially the same as the width of the two flanges 15a and 16a (the thickness of the pair of flanges). It is formed in size.

  At the intersection of the first annular portion 11 and the second annular portion 12, the wire rods 11b and 12b on the one end side and the other end side are bent from the piping side toward the outside of the piping, so that the central portion side The wire rods 11a and 12a are engaged. Here, the piping side means the inside of the pipe connection fitting 10, that is, the side where the pipe is present (arranged). That is, the direction from the pipe side to the outside of the pipe means a direction away from the pipe. As an example, in Embodiment 1, the wire rods 11b and 12b on one end side and the other end side are taken from the axial direction of the piping shaft 17 so as to be caught at the intersection of the first annular portion 11 and the second annular portion 12. It is formed by bending in the radial direction of the pipe (from the inside to the outside of the pipe).

  As shown in FIG. 1, the inner regions of the first annular portion 11 and the second annular portion 12 are arranged so as to face each other, and between the first annular portion 11 and the second annular portion 12. An opening 14 is formed in the bottom. For example, as shown in FIG. 2, the pipe fitting 10 according to the first embodiment is substantially U-shaped or substantially C-shaped when viewed from the front (axial direction of the pipe shaft 17 in FIG. 4). The first annular part 11 and the second annular part 12 are arranged.

  As shown in FIGS. 1-2, the edge part of the wire 11b, 12b of the one end side and the other end side of the 1st and 2nd cyclic | annular parts 11 and 12 is rounded from the viewpoint of the safety on use. Also good. The ends of the wires 11b and 12b on the one end side and the other end side are not limited to this, and may have other shapes.

  As shown in FIG. 3, at the intersection of the second annular portion 12, between the wires intersecting each other (between the central portion side wire 12a and the other end side wire 12b in the second annular portion 12). In addition, there may be a gap generated in manufacturing. Even if there is such a gap, in the first embodiment, in the state where the pipe fitting 10 is attached to the pair of flanges, the wire 12b on the other end side is engaged with the wire 12a on the center portion side. Good. Similarly, there is a gap between the intersecting portions of the first annular portion 11 and the mutually intersecting wires (between the central portion side wire 11a and the one end wire 11b in the first annular portion 11). May be.

<Central part>
The central portion 13 is a central portion of one wire, and connects the first annular portion 11 and the second annular portion 12. That is, the wire rod in the central portion 13 connects the wire rod 11 a on the central portion side of the first annular portion 11 and the wire rod 12 a on the central portion side of the second annular portion 12. The central portion 13 can be elastically deformed so as to open the opening 14 between the first annular portion 11 and the second annular portion 12.

  The material of the wire constituting the pipe connection fitting 10 of Embodiment 1 may be any material that has rigidity that can maintain the connection state of the pipe and can be deformed when the pipe is detached. For example, the wire may be a metal material having spring properties. Examples of the wire material include a stainless steel wire for spring shown in JIS G4314 and a stainless steel wire shown in JIS G4309.

  Next, a state where the pipe connection fitting of the first embodiment is attached to the pipe will be described.

  As shown in FIG. 4, the pipe fitting 10 according to the first embodiment includes a flange 15 a provided at the open end of one pipe 15 and a flange 16 a provided at the open end of the other pipe 16. Connecting. The pipe fitting 10 is mounted so that the two flanges 15a and 16a are sandwiched between the first annular portion 11 and the second annular portion 12 in a state where the flange 15a and the flange 16a are in contact with each other. When the pipe connection fitting 10 is mounted on the flange 15a and the flange 16a, the flanges 15a and 16a are inserted inside the first annular portion 11 and the second annular portion 12, respectively. Thus, in the pipe connection fitting 10 of the first embodiment, the first annular portion 11 and the second annular portion 12 connect and fix the flanges 15a and 16a.

  In the pipe connection fitting 10 according to the first embodiment, the intersecting portions of the first annular portion 11 and the second annular portion 12 are engaged with the mutually intersecting wires. As a result, the first annular portion 11 and the second annular portion 12 are prevented from expanding in the axial direction of the piping shaft 17.

  The effect of the pipe fitting according to the first embodiment of the present disclosure will be described.

  The pipe fitting 10 according to the first embodiment is formed by bending a single wire. For this reason, the pipe connection fitting 10 of Embodiment 1 does not need to be molded by punching unlike the conventional pipe connection fitting, and the material loss is small. Furthermore, the pipe connection fitting 10 of Embodiment 1 does not require a mold for molding.

  In addition, when punching, burrs are generated on the punched surface. Therefore, from the viewpoint of safety in use, it has been necessary to deburr the punched surface with the conventional pipe connection fitting. The deburring of the punched surface requires complicated processing such as barrel polishing, pressing, and burr cutting, but in the pipe connection fitting 10 of the first embodiment, it is only necessary to process the end of the wire. The process can be simplified.

  Therefore, according to the pipe connection fitting 10 of Embodiment 1, productivity can be improved and manufacturing cost can be reduced.

  Since the pipe fitting 10 according to the first embodiment is formed by bending a wire without using a mold, the shape and / or strength can be easily changed. Furthermore, according to the pipe connection fitting 10 of Embodiment 1, since the wire is used, the weight can be reduced.

  The first annular portion 11 and the second annular portion 12 in the first embodiment are formed by bending the wire rods 11b and 12b on the one end side and the other end side, respectively, thereby forming the wire rods 11b and 12b on the one end side and the other end side. And the engagement portion between the wire rods 11a and 12a on the center portion side can be easily formed. Thus, since the pipe connection fitting 10 of Embodiment 1 does not use welding, the spring property which a metal wire has can be maintained.

  The above is the effect of the pipe fitting 10 of the first embodiment.

  In addition, although the piping connection metal fitting 10 of Embodiment 1 demonstrated the structure formed by bending one wire, it is not limited to this. For example, the pipe connection fitting of the present disclosure may be configured using a plurality of wires. Moreover, you may form the engaging part of the 1st annular part 11 and the 2nd annular part 12 by arbitrary fixing means, such as a wire.

  In Embodiment 1, although the width | variety of the area | region inside the 1st annular part 11 and the 2nd annular part 12 was substantially the same as the width (thickness) of a pair of flange, the connection of piping is maintained. It may be larger than the width of the pair of flanges as long as it is possible. By increasing the width of the area inside the first annular part 11 and the second annular part 12, it becomes easier to insert the pair of flanges inside the first annular part 11 and the second annular part 12. .

  At the intersection of the first and second annular portions 11 and 12, the wire rods 11b and 12b on the one end side and the other end side are formed so as to pass inside the wire rods 11b and 12b on the central portion side (the side where the pipe exists). However, the wire rods 11b and 12b on the one end side and the other end side may be formed so as to pass outside the wire rods 11a and 12a on the central portion side (the side on which no pipe exists). In this case, the wire rods 11b and 12b on the one end side and the other end side are bent from the outside of the wire rods 11a and 12a on the center portion side to the pipe side (in the direction approaching the pipe), thereby forming the wire rod 11a on the center portion side. , 12a may be engaged.

  Note that the pipe connection fitting of the present disclosure is not limited to the configuration of the first embodiment, and the technical idea of the present disclosure shown in the configuration of the first embodiment can be implemented in various other modes. is there. For example, the structure of the modification of the piping connection metal fitting 10 of Embodiment 1 as shown in FIGS. 5-8 is demonstrated.

  FIG. 5 is a perspective view of a modification of the pipe connection fitting of the first embodiment. As shown in FIG. 5, the pipe connection fitting 20, which is a modification of the first embodiment, increases the roundness (R) of each corner of the first annular portion 11 and the second annular portion 12. With such a configuration, when the pipe connection fitting 20 is attached to the pair of flanges, the portion corresponding to the finger is rounded, and the handleability can be improved.

  FIG. 6 is a perspective view of another modification of the pipe connection fitting of the first embodiment. As shown in FIG. 6, the pipe fitting 30 that is a modification of the first embodiment is formed by bending the first annular portion 11 and the second annular portion. In FIG. 6, as an example, the first annular portion 11 and the second annular portion are processed into a saw blade shape. With such a configuration, the area where the first annular portion 11 and the second annular portion 12 are in contact with the flange of the pipe increases, and the pipes can be connected more firmly. In addition, the pipe connection fitting 30 can be easily attached to the pair of flanges by bending the leading ends of the first annular portion 11 and the second annular portion 12 so as to spread outward.

  FIG. 7 is a perspective view of another modification of the pipe connection fitting of the first embodiment. As shown in FIG. 7, the pipe fitting 40 which is a modification of the first embodiment is formed by bending the first annular portion 11 and the second annular portion 12 (for example, processing into a saw blade shape). Further, the central portion 13 connecting the first annular portion 11 and the second annular portion 12 is shortened. With such a configuration, a region where the first annular portion 11 and the second annular portion 12 are in contact with the flange of the pipe is further increased, and the pipes can be more firmly connected.

  FIG. 8 is another modification of the pipe connection fitting of the first embodiment. As shown in FIG. 8, the pipe connection fitting 50, which is a modification of the first embodiment, has the first annular portion 11 and the second annular portion 12 formed on substantially arcs. With such a configuration, the contact area between the first annular portion 11 and the second annular portion 12 and the flange of the pipe is increased, and the pipes can be connected more firmly.

  The pipe connection fitting (quick fastener) of the present disclosure is widely used in a cogeneration system and a water heater used for business use and general households. The cogeneration system may include a fuel cell or a gas engine. In addition, the pipe connection fitting of the present disclosure is not limited to these uses, and can be used for various devices.

  The pipe connection fitting (quick fastener) of the present disclosure is a low-cost pipe connection fitting with low material loss, high productivity, and a cogeneration system, a water heater, and air used for business use and general households. It can be widely used for a harmony device, a gas appliance, a refrigerator, etc.

10, 20, 30, 40, 50 Pipe fitting 11 First annular portion 11a Central portion side wire 11b One end side wire 12 Second annular portion 12a Central portion side wire 12b Other end side wire 13 Central portion 14 Opening 15 Piping 15a Flange 16 Piping 16a Flange 17 Piping shaft

Claims (2)

A pipe connection fitting for connecting a flange provided at the open end of one pipe and a flange provided at the open end of the other pipe,
The pipe connection fitting is composed of a single wire,
A first annular portion formed to bend so as to cross the wire on one end side;
A second annular portion formed to bend so as to cross the wire on the other end side;
A central portion of a wire rod, the central portion connected to the first annular portion and the second annular portion,
The first annular portion and the second annular portion are a pair of flanges inside the first annular portion and the second annular portion in a state where the pipe fitting is attached to the pair of flanges. Are placed opposite each other so that
The wires intersecting each other are engaged with each other at the intersecting portions of the first annular portion and the second annular portion, and the first annular portion and the second annular portion expand in the axial direction of the pipe. Suppress,
Pipe fittings. The portion with which the wire is engaged is formed by bending the wire.
The pipe connection fitting according to claim 1.

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