JP2020084724A - Piping connection structure - Google Patents

Abstract

To provide the piping connection structure that easily prevents unevenness between a surface of a pottery and an elastic member.SOLUTION: The piping connection structure for connecting piping to a through hole 103 formed on a surface of the toilet bowl body 101 comprises: an insertion part 51 that is inserted into the through hole; an abutment part 53 that can be abutted around the through hole 103 by expanding a diameter from the insertion part 51; a cylindrical elastic member 5 into which the pipe is inserted in a hollow part 54; and a fixing member that fixes an elastic member 5 and connects the piping to the through hole 103 in a state where the piping is inserted into the through hole 103, wherein the elastic member 5 has a thickness dimension in a contact part 53 along a pipe insertion direction that is larger than a thickness dimension substantially orthogonal to the pipe insertion direction in the insertion part 51.SELECTED DRAWING: Figure 2

Description

The present invention relates to a pipe connection structure.

Conventionally, when connecting a pipe to a pottery such as a toilet bowl or a washbasin, the pipe is inserted and fixed in a through hole formed in the surface of the pottery. The pipe is fixed by being pressed by the elastic member, the washer and the like by being fastened by a fixing member such as a nut with the elastic member and the washer being interposed around the through hole (for example, refer to Patent Document 1).

JP, 2008-303616, A

Since the pottery is formed by firing, fine irregularities are formed on the surface or an inclination is formed, and manufacturing errors are likely to occur depending on the individual pottery. In order to bring the elastic member into close contact with the surface of the pottery, the surface shape of the pottery must be uniform. Therefore, high precision is required for the surface shape of the pottery, and there is a possibility that the production yield of the pottery such as a toilet bowl may deteriorate. Therefore, there has been a demand for a pipe connection structure that can easily prevent unevenness in which the elastic member floats from the surface of the pottery when the pottery is fixed to the pottery via the elastic member.

INDUSTRIAL APPLICABILITY The present invention relates to a pipe connection structure (for example, a pipe 2 described below) that connects a pipe (for example, a pipe 2 described below) to a through hole (for example, a through hole 103 described below) formed on the surface of a pottery (for example, a toilet body 101 described below). A pipe connection structure 1) described below, which can be inserted into the through hole (for example, an insertion part 51 described below) and abutted around the through hole by expanding the diameter from the insertion part. A cylindrical elastic member (for example, an elastic member 5 described below) having a contact portion (for example, an abutting portion 53 described below) inserted into the hollow portion, and A fixing member (for example, a nut 4 described later) that fixes the elastic member and connects the pipe to the through hole in a state where the pipe is inserted, and the elastic member is provided in the contact portion. A thickness dimension along the insertion direction of the pipe (for example, a thickness dimension T1 described later) is larger than a thickness dimension (for example, a thickness dimension T2 described later) substantially orthogonal to the insertion direction of the pipe in the insertion portion. , Connection structure of piping.

It is preferable that an annular inner bead portion (for example, an inner bead portion 52 described later) protruding inward is formed on an inner wall surface of the hollow portion in the contact portion.

The contact portion is formed in a planar shape, and a washer portion (for example, a washer portion 61 described later) and a washer portion arranged on a surface opposite to a surface of the contact portion that abuts around the through hole. It is preferable to have a washer with a guide (for example, a washer with a guide 6 described later) having a guide portion (for example, a guide portion 62 described below) that projects from the peripheral edge of the contact portion and extends along the outer peripheral surface of the contact portion.

The fixing member is made of resin, and has an insertion hole (for example, an insertion hole 41 described below) through which the pipe is inserted, and a seat surface portion (for example, described below that abuts a contacted portion of a member with which the fixing member abuts). It is preferable to have a seat surface portion 42) and a fastening portion (for example, a fastening portion 43 described later) that stands up from the seat surface portion along the insertion direction of the pipe and is fastened with a tool.

It is preferable that the fixing member has a hollow portion (for example, a hollow portion 432 described later) that is partially formed between the insertion hole of the fastening portion and the outer surface of the fastening portion.

A maximum width dimension (for example, a maximum width dimension W1 described below) of the fastening portion in a direction orthogonal to the insertion direction of the pipe is larger than an inside diameter of the through hole of the pottery (for example, an inside diameter D described below). Is preferred.

The maximum width dimension of the fastening portion in the direction orthogonal to the insertion direction of the pipe is narrower than the maximum width dimension of the seat surface portion in the direction orthogonal to the insertion direction of the pipe (for example, maximum width dimension W2 described below). It is preferable that the maximum width dimension of the fastening portion is 70% to 100% of the maximum width dimension of the seat surface portion.

ADVANTAGE OF THE INVENTION According to this invention, the connection structure of the piping which can prevent the unevenness of the surface of a pottery and an elastic member easily can be provided.

It is a figure which shows the toilet device using the piping connection structure of this embodiment. It is sectional drawing of the connection structure of the piping of this embodiment. It is sectional drawing of the elastic member of this embodiment. The nut of this embodiment is shown, (a) figure is a perspective view of a nut, (b) figure is sectional drawing. It is sectional drawing which shows the state which each part of piping in the piping connection structure of this embodiment deform|transformed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a view showing a toilet bowl 100 in which the piping connection structure 1 of the present embodiment is used.
The toilet bowl 100 has a toilet body 101 and a rear upper surface portion 102.
The toilet bowl body 101 has a bowl portion with an open top, and is entirely made of pottery. As shown in FIG. 1, through holes 103 and 104 through which the pipes 2 and 105 for supplying flush water to the toilet body 101 are inserted are formed in the upper rear portion of the toilet body 101. As shown in FIG. 1, the pipe 2 of the present embodiment described below is inserted into the upper through hole 103, and the lower through hole 104 is a jet pipe for generating a jet water flow in the toilet body 101. 105 is inserted.

The rear upper surface portion 102 is a surface that is disposed behind the upper portion of the toilet body 101 and that fixes components that supply water for cleaning the toilet body 101 to the toilet body 101. Specifically, a water supply valve (not shown) is arranged on the rear upper surface portion 102, and this water supply valve is connected to the pipes 2 and 105.

The pipe connection structure 1 is a structure for connecting the pipe 2 to a through hole 103 formed on the surface of the toilet body 101, and is configured by the through hole 103 of the toilet body 101 and the pipe 2.
The pipe 2 has a hose portion 21 whose one end is connected to a water supply source via a water supply valve, and a rim nozzle 3 which is arranged at the other end of the hose portion 21 and which is fixed by being inserted into a through hole 103 of the toilet body 101. ..
FIG. 2 is a cross-sectional view of the pipe connection structure 1. As shown in FIG. 2, the rim nozzle 3 includes a rim nozzle body 30, a nut 4 as a fixing member, an elastic member 5, a washer 6 with a guide, a retaining metal 7, a backup ring 8, and a nozzle cap 9. , With.

The rim nozzle body 30 is a tubular adapter that is inserted into the through hole 103 and fixed while being connected to the end of the hose portion 21. The cleaning water is supplied from the hose portion 21 side of the rim nozzle body 30, and the cleaning water flows toward the end opposite to the hose portion 21. The rim nozzle body 30 has a larger diameter on the downstream side inserted into the through hole 103 of the toilet body 101 than on the upstream side connected to the hose portion 21. Grooves and protrusions are formed on the outer surface of the rim nozzle body 30 according to the shapes of the parts with which the rim nozzle body 30 engages. Specifically, a thread groove 31 that engages with a nut 4 described later is formed on the upstream side of the rim nozzle body 30, and a flange-shaped protrusion that engages with a retaining metal fitting 7 described later is formed on the downstream side. 32 is formed.

FIG. 3 is a sectional view of the elastic member 5. The elastic member 5 is a cylindrical flat packing having a hollow portion 54 on the center side and having a flange formed therein. As shown in FIG. 3, the elastic member 5 has an insertion portion 51, an inner bead portion 52, and a contact portion 53. The rim nozzle body 30 is inserted into the hollow portion 54 of the elastic member 5.

The insertion portion 51 is a substantially cylindrical portion that is inserted into the through hole 103 and extends along the insertion direction in which the rim nozzle body 30 is inserted. As shown in FIG. 2, when the insertion portion 51 is inserted into the through hole 103 of the toilet body 101, a gap S is formed between the insertion portion 51 and the peripheral edge of the through hole 103.

The contact portion 53 is a portion on one side of the insertion portion 51 that expands in a flange shape from the insertion portion 51. As shown in FIG. 2, the contact portion 53 is a portion that can contact the surface of the toilet body 101 around the through hole 103 when the insertion portion 51 is inserted into the through hole 103. The abutting portion 53 is formed in a flat plane shape such that the surface that bends from the insertion portion 51 and expands in diameter is formed into a flat flat surface, and comes into surface contact with the surface of the toilet body 101. Further, the surface on the upstream side opposite to the side in contact with the surface of the toilet body 101 is also formed into a flat flat surface, and the washer 6 with a guide described later contacts.

The contact portion 53 has a thickness dimension T1 of about 4 mm to 8 mm in the direction along which the rim nozzle body 30 is inserted, and the thickness dimension T1 of the contact portion 53 is such that the rim nozzle body 30 is inserted through the insertion portion 51. It is larger than the thickness dimension T2 in the direction substantially orthogonal to the direction, that is, the thickness dimension of the tube of the insertion portion 51.

As shown in FIG. 3, the inner bead portion 52 is an annular convex portion formed on the inner wall surface of the hollow portion 54 in the contact portion 53. The inner bead portion 52 is formed with two rings that protrude inward from the inner wall surface of the hollow portion 54 and are separated vertically. The inner bead portion 52 presses the outer surface of the rim nozzle body 30 when the rim nozzle body 30 is inserted into the hollow portion 54.

The washer 6 with a guide is arranged on the upstream side of the contact portion 53 of the elastic member 5. The washer 6 with a guide is made of resin and has a substantially annular shape, and has a washer portion 61, a guide portion 62, and a through hole 63.

The washer portion 61 is arranged on the surface of the abutting portion 53 of the elastic member 5 on the side opposite to the side that abuts on the surface of the toilet body 101. The washer portion 61 is arranged so as to overlap the contact portion 53 so as to cover the contact portion 53. The washer portion 61 has an outer diameter that is substantially the same as or slightly larger than the contact portion 53.

The guide portion 62 is a side wall that projects from the peripheral edge of the washer portion 61 and extends along the outer peripheral surface of the contact portion 53. The guide portion 62 extends in a direction substantially orthogonal to the surface of the washer portion 61 and is arranged so as to at least partially cover the side surface of the contact portion 53.

The through hole 63 is a circular hole formed on the center side of the washer portion 61 and the guide portion 62, and the rim nozzle body 30 is inserted therethrough.

The retaining metal 7 is an annular metal having a substantially oval through hole 71 through which the rim nozzle body 30 is inserted on the center side. The retaining metal 7 has an extending portion 72 extending downstream from the through hole 103 on the surface of the toilet body 101 so as to be able to come into contact with the peripheral surface of the through hole 103. The retaining metal 7 contacts the flange-shaped projection 32 formed on the downstream side of the rim nozzle body 30 in a state where the rim nozzle body 30 is inserted into the through hole 71, and the extending portion 72 has a surface around the through hole 103. The rim nozzle body 30 is prevented from slipping off to the upstream side by abutting on the downstream side.

The backup ring 8 is an annular metal member having a through hole 81 formed at the center through which the rim nozzle body 30 is inserted. The backup ring 8 is thinner than the retaining metal 7 and has a substantially circular outer shape. The backup ring 8 supports the elastic member 5 when the elastic member 5 is deformed.

The nozzle cap 9 is a cap that covers the downstream end of the rim nozzle body 30 and has a bottomed tubular shape. The nozzle cap has a cap opening portion 91, a cap bottom portion 92, and a cap side surface portion 93.
The cap opening 91 receives the downstream end of the rim nozzle body 30.
The cap bottom portion 92 is a substantially circular surface with which the downstream end of the rim nozzle body 30 contacts, and has a plurality of through holes 94 through which flush water is discharged toward the inside of the toilet body 101.
The cap side surface portion 93 is a substantially cylindrical portion along the downstream side surface of the rim nozzle body 30.

4A is a perspective view of the nut 4, and FIG. 4B is a sectional view. As shown in FIG. 4A, the nut 4 is made of resin and has a rim nozzle body insertion hole 41 as an insertion hole, a seat surface portion 42, and a fastening portion 43.

The rim nozzle body insertion hole 41 is a cylindrical through hole through which the rim nozzle body 30 is inserted into the nut 4. The inner peripheral surface of the rim nozzle body insertion hole 41 is formed with a thread groove 41a on the nut 4 side corresponding to the thread groove 31 formed on the outer peripheral surface of the rim nozzle body 30 on the upstream side. Is engaged with the rim nozzle body 30.

The seat surface portion 42 has a flat surface that comes into contact with the upstream surface of the washer 6 with a guide serving as the contacted portion of the member with which the nut 4 abuts, and is formed in a substantially circular shape in plan view.

The fastening portion 43 is a substantially hexagonal columnar portion formed on the upstream surface of the seat surface portion 42. The fastening portion 43 stands up from the seat surface portion 42 along the insertion direction of the rim nozzle body 30, and is fastened by a tool.

As shown in FIGS. 4A and 4B, the fastening portion 43 has a hollow portion 432 that is partially formed between the rim nozzle body insertion hole 41 and the outer surface of the fastening portion 43. It is formed in a so-called thinned shape. Specifically, a plurality of inner walls 431 extending in the radial direction are formed between the rim nozzle body insertion hole 41 and the outer surface of the fastening portion 43, and the hollow portion 432 is formed between adjacent inner walls 431. It By forming the hollow portion 432 on the outer side of the rim nozzle main body insertion hole 41, the size of the fastening portion 43 itself, that is, the distance between the opposite corners of the hexagonal shape of the fastening portion 43 is formed.

As shown in FIG. 2, in the fastening portion 43, the maximum width dimension W1 of the fastening portion 43 in the direction orthogonal to the insertion direction of the rim nozzle body 30 is larger than the inner diameter D of the through hole 103 of the toilet body 101.

Further, in the fastening portion 43, the maximum width dimension W1 of the fastening portion 43 in the direction orthogonal to the insertion direction of the rim nozzle body 30 is narrower than the maximum width dimension W2 of the seat surface portion 42 in the direction orthogonal to the insertion direction of the rim nozzle body 30. .. Specifically, the maximum width dimension W1 of the fastening portion 43 is 70% to 100% of the maximum width dimension W2 of the seat surface portion 42, preferably about 70 to 80%.

Next, a procedure for fixing the pipe 2 in the pipe connection structure 1 will be described.
As shown in FIG. 2, a state in which the nozzle cap 9 is fitted to the downstream end of the rim nozzle body 30, and the retaining metal 7 and the backup ring 8 are superposed on the protrusion 32 on the outer surface of the rim nozzle body 30. Then, the rim nozzle body 30 is inserted into the through hole 103 from the inside of the toilet body 101 to the outside.

With the upper end side of the rim nozzle body 30 protruding outside the through hole 103 of the toilet body 101, the insertion portion 51 of the elastic member 5 is passed through the rim nozzle body 30, and then the through hole 63 of the washer 6 with a guide is passed through. When the insertion portion 51 of the elastic member 5 and the through hole 63 of the washer 6 with guide are passed through the rim nozzle body 30, the washer 6 with guide covers the upstream side surface of the contact portion 53 of the elastic member 5. At this time, the annular inner bead portion 52 formed on the insertion portion 51 of the elastic member 5 comes into close contact with the outer peripheral surface of the rim nozzle body 30.

Next, the thread groove 41 a formed on the inner peripheral surface of the rim nozzle body insertion hole 41 is engaged with the thread groove 31 of the rim nozzle body 30 while passing the rim nozzle body insertion hole 41 of the nut 4 through the rim nozzle body 30. At this time, the builder first turns it by hand to attach it, but when the engagement becomes tight, the outside of the fastening portion 43 of the nut 4 is pinched with a tool and rotated. In this way, the pipe 2 is connected to the through hole 103 by fixing the elastic member 5 and the washer 6 with the guide with the nut 4 while the rim nozzle 3 is inserted into the through hole 103 of the toilet body 101.

FIG. 5 is a cross-sectional view of the state in which the nut 4 is firmly fastened from the state of FIG. Since the surface of the toilet body 101 is made of pottery, it may have irregularities, slopes, or the like. In this case, in order to bring the elastic member 5 into close contact with the surface of the toilet body 101, the nut 4 is generally tightened with a strong torque. However, as shown in FIG. 4, when the maximum width of the fastening portion 43 is 70% to 100% with respect to the seat surface portion 42 of the nut 4, even if the nut 4 is tightened with a strong torque, the seat surface portion 42 is Hard to be crushed. In FIG. 4, the seat surface portion 42 is bent so that the rim nozzle main body insertion hole 41 side is recessed, but a slight deformation is sufficient.

Furthermore, the outer peripheral surface of the contact portion 53 of the elastic member 5 extends so that the guide portion 62 of the washer 6 with a guide contacts. In this state, as shown in FIG. 4, even if the elastic member 5 is crushed by being tightened from the nut 4 side, the elastic member 5 is prevented from spreading outward in the radial direction by the guide portion 62 of the washer 6 with the guide. Since 5 is pressed, the elastic member 5 presses the surface of the toilet body 101 without flattening.

In addition, the thickness dimension T1 of the contact portion 53 of the elastic member 5 in the direction along the insertion direction of the rim nozzle body 30 is thicker than the thickness dimension T2 of the insertion portion 51 in the direction orthogonal to the insertion direction of the rim nozzle body 30. Therefore, even if it is pressed by the nut 4, the force of the contact portion 53 to keep its shape works sufficiently on both the washer 6 with a guide and the surface of the toilet body 101. It is possible to secure a sufficient surface pressure. For example, when the torque of the nut 4 is tightened at 5±0.5 N·m, it is possible to absorb up to a height of 1.5 mm of the unplanned portion which is not in contact with the surface of the toilet body 101.

After the nut 4 is attached, the upstream end side of the rim nozzle body 30 is connected to the hose portion 21.

According to this embodiment, the following effects are achieved.
In the present embodiment, the pipe connection structure 1 for connecting the pipe 2 to the through hole 103 formed on the surface of the toilet body 101 is expanded with the insertion portion 51 inserted into the through hole 103 and the insertion portion 51. In the state where the pipe 2 is inserted into the through hole 103, and the tubular elastic member 5 having the abutting portion 53 that can come into contact with the periphery of the through hole 103 and through which the pipe 2 is inserted into the hollow portion 54. The elastic member 5 is fixed and the nut 4 for connecting the pipe 2 to the through hole 103 is included. Further, the thickness T1 of the abutting portion 53 of the elastic member 5 along the insertion direction of the pipe 2 is set to be larger than the thickness T2 of the insertion portion 51 substantially orthogonal to the insertion direction of the pipe 2.
Since the thickness dimension T1 of the contact portion 53 along the insertion direction of the rim nozzle body 30 is larger than the thickness dimension T2 of the insertion portion 51 substantially orthogonal to the insertion direction, the surface shape of the toilet body 101 can be manufactured. When the precision is not high, even if a large unplanned portion where the contact portion 53 does not adhere to the surface of the toilet body 101 is formed, the thick contact portion 53 is pushed by the nut 4 and deforms, and the unsteady portion is removed. Can be absorbed.
Further, since the elastic member 5 can be easily brought into close contact with the surface of the toilet body 101, it is not necessary to require high accuracy in the surface shape of the toilet body 101, and the yield is improved in manufacturing the toilet body 101.

In the present embodiment, an annular inner bead portion 52 protruding inward is formed on the inner wall surface of the hollow portion 54 in the contact portion 53. Since the inner bead portion 52 presses the outer side surface of the rim nozzle body 30 of the pipe 2, the elastic member 5 comes into close contact with the rim nozzle body 30. Therefore, the force exerted by the nut 4 on the elastic member 5 can be transmitted to the surface of the toilet body 101 without escaping, and the same effect as described above can be obtained.

In the present embodiment, the contact portion 53 is formed in a planar shape, and the washer portion 61 disposed on the surface of the contact portion 53 opposite to the surface contacting the periphery of the through hole 103 and the peripheral edge of the washer portion 61. The washer 6 with a guide having the guide portion 62 protruding and extending along the outer peripheral surface of the contact portion 53 is included.
Since the planar contact portion 53 makes surface contact with the periphery of the through hole 103 of the toilet body 101, sufficient surface pressure can be applied to the periphery of the through hole 103 of the toilet body 101.
Further, the elastic member 5 having the contact portion 53 and the washer 6 with a guide having the guide portion 62 extending along the outer peripheral surface of the contact portion 53 are fixed by the nut 4. Then, since the guide portion 62 of the washer with a guide suppresses the periphery of the elastic member 5, it is possible to prevent the elastic member 5 from being pushed laterally by the nut 4 and deformed flat. Therefore, the force exerted by the nut 4 on the elastic member 5 can be transmitted to the surface of the toilet body 101 without escaping, and the same effect as described above can be obtained.

In the present embodiment, the fixing member is the resin nut 4. Further, an insertion hole 41 through which the rim nozzle body 30 is inserted, a seat surface portion 42 that abuts the washer 6 with a guide, and a fastening portion 43 that stands up from the seat surface portion 42 along the insertion direction of the pipe 2 and is fastened with a tool, It was composed including.
By using the resin-made nut 4 as the fixing member, it is possible to reduce the manufacturing cost, facilitate the molding, and easily mold the seat surface portion 42 and the fastening portion 43.
Further, since the thick contact portion 53 is pressed by the nut 4 and deforms to easily absorb the uneven portion, the torque when fastening the elastic member 5 can be reduced. Thereby, even if the fixing member such as the nut 4 is molded with resin, it has sufficient durability and the manufacturing cost can be reduced. In addition, the work load on the builder can be reduced because it can be fixed with a light force during construction. Further, by fastening the nut 4 with a tool, the elastic member 5 can be easily fixed, so that the workability is improved.

In the present embodiment, the nut 4 is configured to include the hollow portion 432 that is partially formed between the rim nozzle body insertion hole 41 in the fastening portion 43 and the outer surface of the fastening portion 43.
When the hollow portion 432 is formed between the rim nozzle body insertion hole 41 of the fastening portion 43 and the outer surface of the fastening portion 43, the width of the fastening portion 43 in the direction orthogonal to the insertion direction of the rim nozzle body 30 is consequently formed. Becomes wider. If the width of the fastening portion 43 is relatively wider than the width of the seat surface portion 42, the degree to which the seat surface portion 42 bends when the nut 4 is fastened is reduced. When the deformation of the seat surface portion 42 of the nut 4 is suppressed, the elastic member 5 in contact with the seat surface portion 42 of the nut 4 is sufficiently pressed. Therefore, even with a small torque, the elastic member 5 can be sufficiently pressed, and the same effect as described above can be obtained.

In the present embodiment, the maximum width dimension W1 of the fastening portion 43 in the direction orthogonal to the insertion direction of the rim nozzle body 30 is made larger than the inner diameter D of the through hole 103 of the toilet body 101.
By making the maximum width dimension W1 of the fastening portion 43 larger than the inner diameter D of the through hole 103 of the toilet body 101, it is possible to effectively reduce the degree to which the seat surface portion 42 bends when the nut 4 is fastened. .. Therefore, even with a small torque, the elastic member 5 can be sufficiently pressed, and the same effect as described above can be obtained.

In the present embodiment, the maximum width dimension W1 of the fastening portion 43 in the direction orthogonal to the insertion direction of the rim nozzle body 30 is formed smaller than the maximum width dimension W2 of the seat surface portion 42 in the direction orthogonal to the insertion direction of the rim nozzle body 30. The maximum width dimension W1 of the fastening portion 43 is 70% to 100% of the maximum width dimension W2 of the seat surface portion 42.
By setting the maximum width dimension W1 of the fastening portion 43 to 70% to 100% of the maximum width dimension W2 of the seat surface portion 42, it is possible to effectively reduce the degree of bending of the seat surface portion 42 when the nut 4 is fastened. You can Therefore, even with a small torque, the elastic member 5 can be sufficiently pressed, and the same effect as described above can be obtained.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be modified as appropriate.
For example, in the above embodiment, the pipe 2 has been described as having the rim nozzle 3, but the present invention is not limited to the rim nozzle. For example, the pipe may have a jet nozzle, and the jet nozzle may be provided with the elastic member of the present invention and a washer with a guide.

Further, in the above-described embodiment, the nut 4 is described as an example of the fixing member, but the fixing member is not limited to the nut. Other components may be used as long as the elastic member 5 and the washer 6 with a guide can be fixed in a state where the pipe 2 is inserted into the through hole 103.

Further, in the above embodiment, the fixing member is made of resin, but is not limited to resin. It may be made of metal or another material.
Further, in the above embodiment, the member with which the nut 4 abuts has been described as the washer 6 with the guide, but the member is not limited to the washer 6 with the guide. It may be in contact with other parts for connecting pipes such as washers and packings.

1 Pipe connection structure 2 Pipe 4 Nut (fixing member)
5 elastic member 6 washer with guide 41 rim nozzle body insertion hole (insertion hole)
42 Seat surface part 43 Fastening part 51 Insert part 52 Inner bead part 53 Contact part 54 Hollow part 61 Washer part 62 Guide part 101 Toilet body (pottery)
103 through hole 432 hollow part

Claims (7)

A pipe connection structure for connecting a pipe to a through hole formed on the surface of a pottery,
A tubular shape that has an insertion portion that is inserted into the through hole and an abutting portion that is capable of abutting the diameter of the insertion portion and abutting around the through hole, and has the hollow portion through which the pipe is inserted. An elastic member,
In a state where the pipe is inserted into the through hole, the elastic member is fixed, and a fixing member that connects the pipe to the through hole,
The elastic member is a pipe connection structure in which a thickness dimension of the contact portion along the insertion direction of the pipe is larger than a thickness dimension of the insertion portion substantially orthogonal to the insertion direction of the pipe. The pipe connection structure according to claim 1, wherein an annular inner bead portion protruding inward is formed on an inner wall surface of the hollow portion in the contact portion. The contact portion is formed in a planar shape,
A guide having a washer portion arranged on a surface of the contact portion opposite to the surface contacting the periphery of the through hole and a guide portion projecting from a peripheral edge of the washer portion and extending along an outer peripheral surface of the contact portion. The pipe connection structure according to claim 1 or 2, further comprising a washer. The fixing member is made of resin, the insertion hole through which the pipe is inserted, the seat surface portion that abuts the contacted portion of the member that the fixing member abuts, and the insertion direction of the pipe from the seat surface portion. The pipe connection structure according to any one of claims 1 to 3, further comprising a fastening portion that is upright and fastened with a tool. The pipe connection structure according to claim 4, wherein the fixing member has a hollow portion that is partially formed between the insertion hole of the fastening portion and an outer surface of the fastening portion. The pipe connection structure according to claim 4 or 5, wherein a maximum width dimension of the fastening portion in a direction orthogonal to an insertion direction of the pipe is larger than an inner diameter of the through hole of the pottery. The maximum width dimension in the direction orthogonal to the insertion direction of the pipe in the fastening portion is formed narrower than the maximum width dimension in the direction orthogonal to the insertion direction of the pipe in the seat surface portion,
The pipe connection structure according to any one of claims 4 to 6, wherein the maximum width dimension of the fastening portion is 70% to 100% of the maximum width dimension of the seat surface portion.

Images