JP3084382U - Connection fittings for piping - Google Patents

Abstract

(57) [Summary] (Modifications required) [Problem] In a situation where a water heater or the like becomes smaller, a pipe fitting which cannot apply a sufficient pressing force despite a strong pressing force is required. Make it easy to attach. A metal elastic plate member is used to form a base 2 having a substantially U-shaped cross section and a pair of left-right symmetric arms 10 and 11 extending from the base. 2, upper arm portions 4 and 5 connected to the upper arm portions 4 and 5, bent portions 6 and 7 which are bent so as to protrude outwardly, and upper arm portions connected to the bent portions 6 and 7. This is a pipe connection fitting composed of lower arm portions 8 and 9 having a U-shape.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a pipe fitting, particularly when connecting pipes such as a water heater, after joining flanges formed at the respective ends of the pipes to be connected, to the outer periphery of the joined flange. The present invention relates to a pipe connection fitting for preventing a flange from being separated by being mounted along.

[0002]

[Prior art]

 Conventionally, when connecting piping such as a water heater, a piping fitting 1 'shown in FIG. 3 has been used. However, it is to be noted that the piping fitting 1' can be easily attached by hand. Since it is required to have corrosion resistance, it is made of stainless steel for austenitic spring, and its base 2 'has a substantially U-shaped cross section. A pair of curved arms 10 ′, 11 ′, and respective tips 12 ′, 13 ′ of the pair of arms 10 ′, 11 ′ are bent outward to form an opening 3 ′, A pair of arms 10 'and 11' are provided with rectangular holes 16 'and 17', respectively, extending from the base 2 'to the tips 12' and 13 '.

[0003] Further, as shown in FIG. 4, flanges 102 and 103 are formed at respective ends of pipes 100 and 101 to be connected, as shown in FIG. After joining the flanges 102 and 103, as shown in FIG. 5, the opening 3 'of the pipe fitting 1' is pressed against the outer periphery of the flanges 102 and 103 from the outside of the joined flanges 102 and 103, and then the base portion is formed. When the 2 'is pushed from the outside, the base 2' connecting the arms 10 'and 11' is elastically deformed and the opening 3 'is expanded, and the flanges 102 and 103 are connected to the pipe fitting 1'. It fits into rectangular holes 16 ', 17' formed in the pair of arms 10 ', 11'.

Further, when the base 2 ′ is pushed, the opening 3 ′ of the pipe fitting 1 ′ is pushed and expanded by the flanges 102, 103, and the rims 113, 114, 115, 116 of the rectangular holes 16 ′, 17 ′ are formed. The flanges 102, 103 are guided and fitted toward the base 2 'side of the rectangular holes 16', 17 '.

When the opening 3 ′ of the pipe fitting 1 ′ passes through the maximum outer diameter of the flanges 102 and 103, as shown in FIG. 6, the pipe fitting 1 ′ reduces the restoring force of the elastic deformation of the base 2 ′. Since the opening 3 'attempts to return to the original opening width, the pipe connection fitting 1' is inserted into the rectangular holes 16 'and 17' formed in the arms 10 'and 11'. Since the flanges 102 and 103 joined to each other are fitted and held in a fitted state, the connected pipes 100 and 101 are prevented from being separated from each other.

[0006]

[Problems to be solved by the invention]

 By the way, in a situation where the water heater etc. becomes smaller, the inside of the main body becomes narrower, and in the manual work in the narrow space, the base is pushed from the outside to expand the opening in order to attach the fittings for piping. However, it is difficult to deform because the part that elastically deforms is almost limited to the base, and it is not possible to apply sufficient pressing force despite the need for strong pressing force. It became difficult. It is a first problem to solve that point.

[0007] Furthermore, when mounting the pipe fitting from the outside of the joined flanges, even if the opening of the pipe fitting is brought into contact with the flange, the flange is formed in a rectangular shape formed in the pipe fitting. Since it hits the tip of the pipe fitting without being fitted into the hole, it will not fit into the rectangular hole unless a pressure is applied to the base to expand the opening after contact, so it will not fit into the rectangular hole, so it is a narrow space and not visible It became difficult to attach them securely by hand. It is a second problem to solve that point.

[0008] Furthermore, when the conventional pipe fitting is mounted while pushing and expanding the opening as described above, the elastically deformed portion has almost only the shape of the base portion. Due to the concentration of stress, there is a problem that many permanent strains are generated in the openings and the openings are easily dropped. It is a third problem to solve that point.

The present invention has been made in view of the above-mentioned problems, and does not require a strong pressing force even in a work in a narrow space, enables easy and reliable mounting, and has a permanent It is a fourth object of the present invention to provide a pipe fitting with reduced distortion.

[0010]

[Means for Solving the Problems]

 In order to solve the above problems, a pipe connection fitting according to the present invention uses a metal elastic plate, and has a base 2 having a substantially U-shaped cross section and a pair of symmetrical arms 10 and 11 extending from the base. The arms 10 and 11 have upper arms 4 and 5 connected to the base 2 and bent portions 6 and 7 connected to the upper arms 4 and 5 and bent so as to protrude outward. And lower arm portions 8 and 9 which are connected to the bent portions 6 and 7 and form a U-shape with the upper arm portion. The pair of arm portions 10 and 11 are opposed to each other to form a substantially quadrilateral shape. The distal end portions 12 and 13 of the lower arm portions 8 and 9 are bent so as to protrude inward to form bent portions 20 and 21, and an opening 3 is formed between the bent portions 20 and 21. The lever 3 is made to face the base 2 so that the bent portions 20 and 21 at the front end are folded. The armature is bent at an angle of 60 ° or more with respect to a vertical line at the position of the opening 3, and the upper arm portions 4, 5 are bent from the position where they partially bite into the base 2, and the bent portions 6, 7. Rectangular holes 14 and 15 are formed up to the connection with the bent portions 6 and 7 from the connection with the bent portions 6 and 7 to the vicinity of the tip of the tip portions 12 and 13 beyond the bent portions 20 and 21. It is characterized by a pipe connection fitting formed of a single metal elastic plate material having rectangular holes 16 and 17 formed therein.

[0011]

[Action]

 FIG. 2 is a perspective view in which the pipe fitting 1 according to the present invention is attached to a portion where a pipe used in a main body such as a water heater is connected, and is formed at each end of the pipes 100 and 101. When the opening 3 of the pipe fitting 1 is brought into contact with the flanges 102 and 103 along the outer circumference thereof, the outermost edges of the flanges 102 and 103 are fitted into the rectangular holes 16 and 17 and then the base of the pipe fitting 1 is formed. 2 is pressed from the outside, the connection between the base 2 and the upper arms 4 and 5, the connection between the upper arms 4 and 5 and the bent portions 6 and 7, and the bent portions 6 and 7 and the lower arms 8 and 9. The opening 3 is pushed open by the elastic deformation of the connecting portion with the flanges 102 and 103, and the flanges 102 and 103 are fitted into the rectangular holes 16 and 17 toward the base 2 direction.

Further, when the base 2 of the pipe fitting 1 is pushed, the opening 3 reaches the maximum outer diameter portion of the flanges 102 and 103, and when passing through the maximum outer diameter portion, the opening 3 is opened by the restoring force of elastic deformation. Since the opening 3 tries to return to the original opening width, the opening 3 tries to return to hold the flanges 102 and 103 without pushing the base 2 from outside, so that the flanges 102 and 103 are fitted. By fitting the flanges 102 and 103 into the rectangular holes 14 and 15 while being guided by the rectangular holes 16 and 17, the connected pipes 100 and 101 are mounted so as not to be separated.

[0013]

Embodiment 1 A pipe fitting according to the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the pipe fitting 1 according to the present invention uses a single stainless steel SUS304-CSPH material for a spring, which is a metal elastic plate material. The pipe fitting 1 of the present invention comprises a base 2 having a substantially U-shaped cross section and a pair of symmetrical arms 10 and 11 extending from the base. The arms 10 and 11 have upper arms 4 and 5 connected to the base 2, bent portions 6 and 7 connected to the upper arms 4 and 5 and bent outwardly, and bent portions 6 and 7. The lower arm portions 8 and 9 are formed in a U-shape with the upper arm portion by being connected to the upper arm portion. It has a quadrilateral shape. The bent portions 20 and 21 are formed by bending the tip portions 12 and 13 of the lower arm portions 8 and 9 so as to protrude inward. An opening 3 is formed between the bent portions 20 and 21, and the opening 3 is positioned opposite the base 2. The bent portions 20 and 21 at the distal end are bent at an angle of 60 ° or more with respect to the vertical line at the position of the opening 3. The upper arms 4 and 5 are formed with rectangular holes 14 and 15 from the position where they partially cut into the base 2 to the connection with the bent portions 6 and 7, and the bent portions 6 and 7 are also formed in the lower arms 8 and 9. The rectangular holes 16, 17 are formed from the connecting portion of FIG.

[0014]

[Embodiment 2] When the pipe fitting 1 according to the present invention is mounted along the outer periphery of the joined flanges 102, 103 of the two pipes 100, 101 to be connected, the shafts of the pipes 100, 101 The distance from the center to the outermost part of the base 2, the distance from the axis of the pipes 100 and 101 to the outermost part of the bent parts 6 and 7 of the arms 10 and 11, and the tip from the axis of the pipes 100 and 101. The configuration is such that the distances to the tips of the portions 12 and 13 are substantially equal and are located on the same circumference, and the operation and effect are the same as those of the first embodiment.

[0015]

【effect】

 The pipe fitting according to the present invention has a substantially quadrilateral shape formed by a pair of upper and lower arms and a bent portion from the base having a substantially U-shaped cross section to the opening provided on the side facing the base. Therefore, when it is installed from the outer periphery of the connected flange of the connected pipe, the deformed part when the opening is expanded is the connecting part between the base and the upper arm connected to the base, the upper arm part And the connecting portion between the bent portion connected to the upper arm portion thereof and the connecting portion between the bent portion and the lower arm portion connected to the bent portion. Since it is flexibly deformed as compared to the case where only the connecting portion with the arm is deformed, there is an effect that it can be attached with a lower pressing force than a conventional pipe fitting. In addition, since the pair of arms have a substantially quadrangular shape, it is easy to control the spring-back during the molding process, so that the variation in the product due to the molding process, particularly the variation in the opening portion, can be reduced. is there. Furthermore, by making the pair of arms have a substantially quadrilateral shape, it is easy to control the springback during the forming process, and it is possible to use a material having a higher elasticity limit. There is an effect that a material having a thickness smaller than the thickness used for the material can be used. In addition, since the pipe fitting according to the present invention has an arm portion and a bent portion between the base and the opening, it is formed in comparison with the curved arm portion of the conventional pipe fitting. Since the springback during processing has become easier to control, it becomes possible to use SUS304-CSP3 / 4H material, which is a material used for conventional pipe fittings, and SUS304-CSPH material having a higher elasticity limit. Since the elastically deformed portion disperses, the bending stress also disperses, as shown in Fig. 3, when the flange is connected to the connected flange of the connected pipe from the outer periphery, permanent distortion generated in the opening can be suppressed. This has the effect of preventing falling off. In addition, in the pipe fitting according to the present invention, since the bending of the tip of the lower arm portion forming the opening is bent outward at an angle of 60 degrees or more with respect to the vertical line at the bent portion, the connection is made. When the opening is abutted from the outer peripheral direction of the flange to which the pipe is joined, the outer edge of the flange fits into the rectangular hole formed penetrating the opening, so that it opens like a conventional pipe fitting. As compared with the case where the base is pressed against the flange after the portion is brought into contact with the flange and fitted into the rectangular hole, there is an effect that the mounting can be surely performed without displacement. Further, in the pipe fitting according to the present invention, since the rectangular hole into which the flange is inserted is divided by the bent portion, the hole width of the rectangular hole is not deformed by bending the bent portion. Therefore, the desired hole width is made possible, and thus there is an effect that the fitting to the flange can be more stably performed. In addition, when the pipe fitting according to the present invention is mounted from the outer peripheral direction of the connected flange of the connected pipe, the distance from the pipe axis to the outermost part of the base, and the bending of the arm from the pipe axis. Because the distance to the outermost part and the distance from the axis of the pipe to the tip of the tip are set to the same length, they come into contact when mounting to multiple pipes in a narrow space. This has the effect that it can be mounted without any need. Thus, the pipe fitting according to the present invention enables easy and reliable installation in a narrow working space, particularly in a working space which is not visible, without fear of falling off after mounting. Furthermore, the pipe fitting according to the present invention has a rectangular hole formed in each arm portion into which the connected flange of the connected pipe is fitted, and is divided by a bent portion, so that the pipe fitting is compared with the conventional pipe fitting. This has the effect of increasing the strength in the direction in which the joined flanges come away from each other, and providing high impact resistance to the water hammer phenomenon in water heaters and the like.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a pipe fitting according to the present invention.

FIG. 2 is a perspective view showing a state in which the pipe fitting according to the present invention is mounted on both joined flanges of the pipe to be connected.

FIG. 3 is a perspective view showing an example of a conventional pipe connection fitting.

FIG. 4 is a cross-sectional view of a conventional pipe.

FIG. 5 is a perspective view showing a state in which mounting of a conventional pipe connection fitting on both flanges of a pipe to be connected is started.

FIG. 6 is a perspective view showing a state in which a conventional pipe fitting is mounted on both flanges of a pipe to be connected.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Piping connection fitting of the present invention 2 Base 3 Opening 4 Upper arm part 5 Upper arm part 6 Bending part 7 Bending part 8 Lower arm part 9 Lower arm part 10 Arm part 11 Arm part 12 Tip part 13 Tip part 14 Rectangular hole 15 Rectangular Hole 16 rectangular hole 17 rectangular hole 20 bent part 21 bent part 1 'conventional pipe fitting 2' base 3 'opening 10' arm 11 'arm 12' tip 13 'tip 16' rectangular hole 17 ' Rectangular hole 100 Pipe 101 Pipe 102 Flange 103 Flange 113 Edge of rectangular hole 114 Edge of rectangular hole 115 Edge of rectangular hole 116 Edge of rectangular hole

Claims (2)

[Utility model registration claims] 1. A base 2 having a substantially U-shaped cross section and a pair of left-right symmetric arms 10 and 11 extending from the base. The arms 10 and 11 are connected to the base 2 in an upper arm portion. 4 and 5; bent portions 6 and 7 connected to the upper arm portions 4 and 5 and bent so as to protrude outward; and upper and lower arms connected to the bent portions 6 and 7 to form a bent shape. A pair of arms 10 and 11 are opposed to each other to form a substantially quadrilateral shape, and the distal ends 12 and 13 of the lower arms 8 and 9 are convex inward. The bent portions 20 and 21 are formed as described above, an opening 3 is formed between the bent portions 20 and 21, the opening 3 is opposed to the base 2, and the bent portions 20 and 21 at the distal end portion are formed. Fold at an angle of 60 ° or more with respect to the vertical line at the position of the opening 3. Are those, wherein the upper arm portion 4 and 5
Is bent from the position where it partially cut into the base 2,
The lower arm portions 8 and 9 also extend from the connection portions with the bent portions 6 and 7 beyond the bent portions 20 and 21 to the vicinity of the distal ends of the tip portions 12 and 13. A pipe connection fitting made of a single metal elastic plate material having rectangular holes 16 and 17 formed therein. 2. The two pipes 1 to which the pipe fitting 1 is connected.
00, 101 each joined flange 102,
When installed along the outer periphery of 103, the pipes 100, 101
And the distance from the axis of the
Bent portions 6, 7 of arms 10, 11 from the axis of 101
Is almost equal to the distance from the axis of the pipes 100, 101 to the tips of the tip portions 12, 13,
The piping fitting according to claim 1, wherein the fitting is configured to be located on the same circumference.