JPH11166677A - Flange tightening fixture and pipe connection part structure using this flange tightening fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a flange tightening fixture by reducing a cost and with an execution worker so as to be able to safely and easily perform piping connection work. SOLUTION: In a pipe connection part butt placing a flange part 14, 15 provided in both end parts of a pipe 2 and a water supply port 3, a flange tightening fixture 13 covering an outer side with a protection member 22 formed of soft material to be provided with a pair of connection members 20, 20 in an inner side, while elastically deformed, is pressed in from a radial direction, fitted in by snap action and connected, and the pipe 2 and the water supply port 3 are prevented from being dislocated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flange fastener for fastening a pipe connecting portion in which flange portions provided at ends of two pipes are joined to each other, and a pipe connecting portion structure using the same. TECHNICAL FIELD The present invention relates to a flange fastener suitable for a pipe connection for supplying water to a human body local cleaning device installed in a human body and a pipe connection part structure using the same.

[0002]

2. Description of the Related Art A human body cleaning device is installed on a toilet bowl,
The piping is branched from the plumbing facilities in the toilet to receive water supply. Conventionally, a pipe connection structure shown in FIGS. 7 and 8 is known as a pipe connection structure for supplying water to the human body local cleaning device.

In the piping connection structure shown in FIG. 7, a water supply port 3 provided on the back side of a cleaning device main body 1 and a piping 2 branched from a piping facility 10 in a toilet are connected to an O-ring 5.
(Sealing material) are interposed, and the cap nut of the fastening element 4 attached to the tip of the pipe 2 is connected to the thread of the water supply port 3 by screwing.

FIG. 8 shows a structure of a pipe connecting portion according to Japanese Utility Model Laid-Open Publication No. 7-42389, in which a flange 6 provided at each end of a pipe 2 and a water supply port 3 is provided with a radius at a pipe connecting portion. The flanged fastener 7 made of metal plate is pushed in while elastically deforming from the direction, and the flanges 6 and 6 are fitted into the engagement holes 8 by snap action, and the edges 9 and 9 are pushed to the outer circumferences of the pipe 2 and the water supply port 3. The pipe 2 and the water supply port 3 are connected to each other.

[0005]

However, the conventional pipe connection structure shown in FIG. 7 requires a tool such as a wrench for the pipe connection work, and the work efficiency is poor. In the structure, since the flange fastener 7 is made of a thin metal plate, deburring is required at the time of production, and the productivity is poor. In addition, the operator may hurt his hand at the edge 9 at the time of pipe connection. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to be able to produce easily and inexpensively, and to provide a safe and easy piping connection work for an installer. And a pipe connection structure using the same.

[0007]

In order to achieve the above object, the invention of a flange fastener according to claim 1 is, as shown in FIG. 3, provided with two pipes (a pipe 2 and a water supply port 3). In the flange fastener 13 for fastening a pipe connection portion where the flange portions 14 and 15 abut each other, a space 18 accommodating the abutted flange portions 14 and 15 and back surfaces 14B of both flange portions on both sides of the space 18 , 15B and the inner end faces 19, 19 contacting the two flange portions 14,
A pair of fastening members 20, 20 holding the pair 15 from both sides in the radial direction, a connecting portion 21 connecting one side of the pair of fastening members 20, 20, and a protection member covering the outer periphery of the fastening members 20, 20 22 and 22 are provided.

According to a second aspect of the present invention, in the flange fastener according to the first aspect, as shown in FIG. 3, the connecting portion 21 has elasticity.

According to a third aspect of the present invention, in the flange fastener according to the first aspect, as shown in FIG.
The self-hinge portion 23 prevents the flange fastener 13 from falling off from the pipe connection portion.

The invention of the fourth aspect of the invention is shown in FIG.
As shown in the figure, a flange 18 having a U-shaped cross section in a flange fastener 13 for fastening a pipe connecting portion where flanges 14 and 15 provided at ends of two pipes (a pipe 2 and a water supply port 3) abut each other. A pair of fastening members 20, 20 that house the flange portions 14, 15 butted against the outer periphery of the pair of fastening members 20, 20, which hold both flange portions 14, 15 from both sides in the radial direction, In addition, it is characterized in that it comprises a connecting portion 21 for connecting one side of these fastening members 20, 20, and a protective member 22 having a self-hinge portion 23 provided on the other side.

The invention of the flange fastener of claim 5 is shown in FIG.
As shown in FIG. 6, both ends 26A of a flange fastener 30 (see FIG. 6) for fastening a pipe connecting portion in which flange portions 14 and 15 provided at ends of two pipes (piping 2 and water supply port 3) are joined to each other. , 26A) with the flange portions 14, 15
Separate from the outer periphery, the central portion 26B is curved along the pipe portion of the pipe, and both end portions 26A, 2
6A, a pair of plate-like fastening members 26, 26 provided with a rectangular engagement hole 31 provided over a part of the pair of fastening members 2;
An elastic connecting portion 27 connecting one side of 6, 26;
Protection members 28, 28 made of a soft material covering the outer periphery of the fastening members 26, 26;
Are engaged with the flange portions 14 and 15 which are opposed to each other, and the pipe connection portion is fastened so as to hold the both flange portions 14 and 15 from both sides in the radial direction.

[0012] The invention of the piping connection part structure of claim 6 is shown in FIG.
As shown in the figure, between a pipe connecting portion where flanges 14 and 15 provided at ends of two pipes (pipe 2 and water supply port 3) are joined to each other, and between the two pipes (pipe 2 and water supply port 3). A space 18 (see FIG. 3) for accommodating the O-ring 5 (sealant) provided at the front end and the flange portions 14 and 15 which are abutted against each other.
And the back surfaces 14B, 1
5B, and a pair of fastening members 20, 20 having inner end surfaces 19, 19 (see FIG. 3) in contact with the pair of fastening members 2
A connecting portion 21 (see FIG. 3) connecting one side of 0 and 20;
A flange fastener 13 having a protection member 22 covering the outer circumference of the fastening members 20, 20, wherein the pair of fastening members 20, 20 of the flange fastener 13 are both flange portions 1.
It is characterized in that the butted flange portions 14 and 15 are fastened so that the flange portions 4 and 15 are held from both sides in the radial direction.

According to a seventh aspect of the present invention, in the piping connection structure of the sixth aspect, as shown in FIG. 3, the connecting portion 21 has elasticity, and the flange portions 14 and 15 have a radius by the elasticity of the connecting portion. It is characterized by being held from both sides in the direction.

According to an eighth aspect of the present invention, in the piping connection structure of the sixth aspect, a self-hinge portion 23 is provided on the flange fastener as shown in FIG. The fasteners 14, 15 are prevented from falling off.

According to a ninth aspect of the present invention, in the piping connection structure of the sixth aspect, as shown in FIG. 2, an O-ring 5 (seal material) projects from the flange portion 2 of one of the pipes and the inside of the other pipe 3. Is provided on the fitting portion 16 inserted into the second member.

The "piping" in the present invention includes, for example, a water supply port provided on the back side of the cleaning device main body.
It includes a tubular portion having the function of piping.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a pipe connection structure according to the present invention.

FIG. 1 is a perspective view showing a state in which a pipe connection portion structure according to an embodiment of the present invention is used in a human body local cleaning device. Reference numeral 1 denotes a main body of the human body local cleaning device. Is placed on the toilet bowl 12, and a water supply port 3 is provided on one side of the back surface. On the other hand, an O-ring 5 is provided at the tip of the pipe 2 branched from the plumbing facility 10 in the toilet.
(Sealing material) is attached, and the flange fastener 13 connects the pipe connection portion between the pipe 2 and the water supply port 3.

FIG. 2 is a cross-sectional view showing the details of the pipe connection portion of FIG. 1. The flange portion 14 is provided at the end of the pipe portion 3A of the water supply port 3, and the flange portion 15 is provided at the end portion of the pipe 2. In the case of metal, it is attached by welding, and in the case of plastic, it is attached by bonding or the like, and these flange portions 14 and 15 abut against each other to form a pipe connection portion.

From the flange portion 15 of the pipe 2, a fitting portion 16
An O-ring groove 17 is formed on the outer periphery of the fitting portion 16. The O-ring 5 (seal material) is fitted into the O-ring groove 17, and the fitting portion 16 is 3 is inserted into the pipe section 3A to seal the pipe connection section. Thereby, water leakage from the pipe connection portion is prevented.

The pipe connecting portion where the above-mentioned flange portions 14 and 15 abut each other is fastened and connected by a flange fastener 13. As shown in FIGS. 3 and 4, the flange fastener 13 has a groove (space) 18 having a U-shaped cross section for housing the flanges 14 and 15, and a back surface of both flanges on both sides of the groove (space) 18. Inner end face 1 in contact with 14B, 15B
A pair of fastening members 20, 20 having the flange portions 14, 15 from both sides in the radial direction of the flange, and connecting one side of each of the pair of fastening members 20, 20. An elastic connecting portion 21 and the fastening member 2
Protective member 2 which covers the outer periphery of 0, 20 and is integral with connecting portion 21
A self-hinge part 23 provided integrally with the fastening members 20, 20 is provided on the side of the fastening members 20, 20 which are not connected by the connecting part 21.

In the present embodiment, the connecting portion 21, the protective members 22, 22, and the self-hinge portion 23 are integrally formed of an elastic soft plastic, for example, polypropylene, polyamide, or rubber. The hinge portion 23 is connected to the one protection member 22 by a thin portion 23A,
This thin portion 23A is bendable. A hook portion 23B is formed at the tip of the self-hinge portion 23, and a lock portion 23C is formed at the end of the other protective member 22 without the self-hinge portion 23. The flange fastener 13 is prevented from being detached from the pipe connection part by being hooked on 23C.

The entirety of the connecting portion 21, the protective member 22, and the self-hinge portion 23, which are integrally formed of plastic or rubber, have a function of protecting the hand of the installer.
The whole of 2 and 23 can also be referred to as a protective member having a connecting portion 21, a protective cover 22 of the fastening member 20, and a self-hinge portion 23.

The material of the fastening member 20 is a material which can withstand the water pressure applied to the inside of the pipe 2 and the external force applied to the pipe 2, has a relatively high tensile strength, is resistant to moisture and is resistant to corrosion, for example, a plastic containing glass fiber, Stainless steel or the like is preferred. In the present embodiment, the fastening member 20 and the protection member 22 are joined by adhesion. The connecting portion 21 has elasticity by making its shape slightly thinner or by making it into an arc shape as shown in FIG.

The thus constructed flange fastener 13
Push in from the radial direction of the flange of the pipe connection,
The fitting flange portions 14 and 15 are fastened by fitting by the snap action of the elasticity of the connecting portion 21.
The flange fastener 13 is detachably fixed to the pipe connection part. Thereby, it is possible to prevent the pipe 2 from coming off from the water supply port 3 by water pressure or the like, and to introduce water into the cleaning device main body 1 (see FIG. 1) while maintaining the water tightness of the O-ring 5 (sealant) portion. it can. Further, the hook portion 23B of the self-hinge portion 23
Hooking and locking with the locking portion 23C can prevent the flange fastener 13 from falling off from the pipe connection portion due to external force or the like, and increase safety.

If the pipe connection is made using the flange fastener 13, the builder will be able to connect with the soft connecting part 2 at the time of construction.
1. Since the user only needs to touch the protection member 22 and the self-hinge part 23, the hand is not hurt.

In order to connect the fastening member 20 and the protection member 22, in addition to the above-described bonding, a recess is formed on one of the fastening member 20 and the protection member 22, and a projection is formed on the other. When fitting the parts or when the fastening member 20 is made of metal,
The fastening member 20 is inserted and molded when forming the protection member 22 and the like, or is solidified while immersing the fastening member 20 in molten plastic as the protection member 22, and is processed to protect the fastening member 20. Various bonding methods such as finishing the member 22 can be used.

Even if the above-mentioned self-hinge part 23 is not provided, the connection of the pipe connection part can be performed. In particular, when the elasticity of the connecting portion 21 is strong, the risk of falling off is reduced even without providing the self-hinge portion 23. On the other hand, when the self-hinge portion 23 is used, the connecting portion 21 may not have elasticity. For example, the connecting portion 21 may be a flexible connecting portion 21 or a connecting portion 21 with a hinge.

Further, the connecting portion 21, the protection member 22, and the self-hinge portion 23 may be manufactured as separate parts without being integrally formed, and these may be connected.

FIG. 5 is a perspective view showing a fastening member according to another embodiment of the present invention. In this embodiment, a metal plate-like fastening member 24 is used. The fastening member 24 is separated from the outer periphery of the flange portions 14 and 15 when the both end portions 24A and 24A are assembled to the flange portions 14 and 15 (see FIG. 3), and the center portion 24B is formed along the pipe portion of the pipe 2. And both end portions 24A, 2B extending from the central portion 24B.
The abutting flange portions 14 and 15 are engaged with a rectangular engagement hole 25 provided over a part of the 4A, so that the pair of fastening members 24 and 24 hold the flange portions 14 and 15 from both sides in the radial direction. I do.

Although not shown, the connecting portion, the protection member and the self-hinge portion conform to the embodiment shown in FIG. That is, the fastening member 24 shown in FIG. 5 is attached to the protection member 22 instead of the fastening member 20 shown in FIGS. When the connecting portion 21, the protection member 22, and the self-hinge portion 23 are integrally formed of plastic, the fastening members 24, 24 are insert-molded and the like.
4 and 24 are also integrated. The ends 24A of the fastening members 24 are located at both ends of the protection member 22 and sufficiently embedded in the resin portion. , 1
5, so that the flange fastener is completed. Note that, instead of the metal plate-shaped fastening member 24, a plate-shaped fastening member made of another material such as hard plastic may be used.

The flange fastener thus constructed can be used for fastening a pipe connecting portion whose flanges are abutted in the same manner as the flange fastener 13 of FIG.
Construction can be performed easily and safely, similarly to the flange fastener 13.

FIG. 6 is a perspective view showing a flange fastener according to still another embodiment of the present invention. The flange fastener 30 according to the present embodiment uses, as a fastening member, one obtained by connecting left and right plate-shaped fastening members 26, 26 at a fastening member connecting portion 27 and integrating them, and uses a fastening member 26-fastening member connecting portion. A protection member 28 made of a soft plastic, a connecting portion 29 and a protection member 28 are bonded and covered on the outer periphery of the fastening member 26.

As in the case of the fastening member 24 of FIG. 5, the pair of fastening members 26, 26 have both ends 26A, 26A separated from the outer periphery of the flange portions 14, 15 (see FIG. 3), and the central portion 26B has a pipe portion of the pipe 2. The flange portions 14 and 15 are curved along the center portion 26B and abut the rectangular engagement holes 31 provided from the central portion 26B to a part of both end portions 26A and 26A connected thereto.
So that both flange portions are held from both sides in the radial direction. In addition, a hole of the same size as the engagement hole 31 is provided in the resin of the portion of the protection member 28 which is in contact with the back surface of the engagement hole 28 so that the flange portions 14 and 15 can be accommodated.

The plate-shaped fastening member connecting portion 27 and the plastic connecting portion 29 have an appropriate elasticity, and the flange fastener 30 is connected to the end 26A on the side of the opening 32 where the pipe 2 is released from the pipe 2. When the fitting is pressed against the connecting portion, this portion is elastically deformed, and the flange fastener 30 is detachably fixed to the pipe connecting portion by a snap action, and securely connects the pipe connecting portion in a watertight manner. Since the elasticity of the flange fastener 30 for holding the pipe 2 is stronger than that of the flange fastener 13 of FIG. 3 by the fastening member connecting portion 27, the flange fastener 30 cannot be disengaged without providing the self-hinge portion 23 shown in FIG. Absent.

The material of the fastening member 26 and the fastening member connecting portion 27 in this embodiment is preferably a thin plate of stainless steel, phosphor bronze, hard plastic or the like. When a metal is used, it is preferable to coat the surface with a corrosion-resistant coating because it is more resistant to rust and electrolytic corrosion when attached to a metal pipe.
As a material of the protection member 28 and the connecting portion 29, an elastic and soft plastic, for example, a material integrally formed of polypropylene, polyamide, or rubber can be used.

In the above-described embodiments, the pipe connection for supplying water to the human body local cleaning device has been described. However, the present invention can be applied to other pipe connection. The O-ring 5 (seal material) may be disposed in a case where a thick pipe is connected, for example, by providing an annular groove on one or both of the abutting contact surfaces of the flange portions 14 and 15, and providing the O-ring 5 ( Sealing material) or the flange 1
An annular step may be provided on one of the butting contact surfaces 4 and 15 to sandwich the O-ring 5 (sealant).
In the case of connecting a thick pipe, the influence of the water pressure increases, so that the strength of the fastening members 20, 24, and 26 in the pipe longitudinal direction needs to be higher.

[0038]

As described above, according to the present invention, a worker can safely, reliably and easily connect a pipe without using a tool such as a wrench, without having to worry about injuring hands. There is an effect that connection work can be performed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a piping connection structure according to an embodiment of the present invention is used in a human body local cleaning apparatus.

FIG. 2 is an enlarged cross-sectional view of the pipe connection structure of FIG.

FIG. 3 is a partially exploded perspective view of FIG. 2;

FIG. 4 is a perspective view showing a fastening member used in the piping connection part structure of FIG. 1;

FIG. 5 is a perspective view showing a fastening member according to another embodiment of the present invention.

FIG. 6 is a perspective view showing a flange fastener according to still another embodiment of the present invention.

FIG. 7 is a perspective view showing a state in which the conventional pipe connection structure is used for a human body local cleaning device.

FIG. 8 is a partially exploded perspective view of a conventional piping connection structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cleaning device main body 2 Piping 3 Water supply port 3A Piping part 4 Fastening element 5 O-ring (seal material) 6 Flange part 7 Flange fastener 8 Engagement hole 9 Edge 10 Piping equipment 12 Toilet bowl 13 Flange fastener 14 Flange 14B Back Reference Signs List 15 flange portion 15B back surface 16 fitting portion 17 groove for O-ring 18 groove (space) 19 inner end face 20 fastening member 21 connecting portion 22 protective member 23 self-hinge portion 23A thin portion 23B hook portion 23C locking portion 24 fastening member 24A both ends Part 24B Central part 25 Engagement hole 26 Fastening member 26A Both ends 26B Central part 27 Fastening member connecting part 28 Protective member 29 Connecting part 30 Flange fastener 31 Engagement hole 32 Opening

Claims (9)

[Claims] 1. A flange fastener for fastening a pipe connecting portion formed by abutting flange portions provided at ends of two pipes, wherein a space accommodating the butted flange portions and two flange portions on both sides of the space are provided. Having an inner end face in contact with the back surface,
It comprises a pair of fastening members holding both flange portions from both sides in the radial direction, a connecting portion connecting one side of the pair of fastening members, and a protection member covering an outer periphery of the fastening member. Flange fasteners. 2. The flange fastener according to claim 1, wherein the connecting portion has elasticity. 3. A self-hinge portion is provided on a side of the fastening member that is not connected by the connection portion, and the self-hinge portion prevents the flange fastener from dropping off from the pipe connection portion. 2. The flange fastener according to claim 1. 4. A flange fastener for fastening a pipe connecting portion formed by abutting flange portions provided at ends of two pipes, wherein the flange portion abutted on a U-shaped groove is accommodated.
A pair of fastening members that hold both flange portions from both sides in the radial direction, a connecting portion that covers the outer periphery of the pair of fastening members and connects one side of these fastening members, and a self-hinge provided on the other side And a protection member having a portion. 5. A flange fastener for fastening a pipe connecting portion formed by abutting flange portions provided at ends of two pipes, wherein both ends are separated from an outer periphery of the flange portion, and a center portion is formed along the pipe portion of the pipe. A pair of plate-shaped fastening members provided with a square engagement hole provided from the center portion to a part of both end portions connected to the center portion, and an elasticity for connecting one side of the pair of fastening members. A connecting portion, and a protection member made of a soft material covering the outer periphery of the fastening member. The piping is engaged with the flange portions where the engagement holes are abutted, and both flange portions are held from both sides in the radial direction. A flange fastener for fastening a connecting portion. 6. A pipe connecting portion provided at the ends of two pipes where flanges are joined to each other, a sealing material provided between the two pipes, a space for accommodating the butted flanges, Flange fastening comprising: a pair of fastening members having inner end surfaces that are in contact with the back surfaces of both flange portions on both sides of the pair, a connecting portion connecting one side of the pair of fastening members, and a protection member covering an outer periphery of the fastening member. A pair of fastening members of the flange fastener, the two flange portions being held from both sides in the radial direction, and the butted flange portions are fastened to each other. 7. The piping connection structure according to claim 6, wherein the connection portion has elasticity, and the elasticity of the connection portion holds both flange portions from both sides in the radial direction. 8. The flange fastener is provided with a self-hinge portion, and the self-hinge portion prevents the flange fastener from dropping from the pipe connection portion.
Pipe connection structure as described. 9. The piping connection structure according to claim 6, wherein the sealing material is provided at a fitting portion projecting from a flange portion of one of the piping and inserted into the other piping.