JP2014129657A - Piping connection device and flush toilet bowl with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piping connection device capable of easily performing attachment and detachment.SOLUTION: There is provided a piping connection device which connects an outlet part of a drain path of sanitary facility equipment and an intake part of a drain pipe provided in a building skeleton to each other. The piping connection device includes: a flange; a primary-side cylinder part which is extended from the flange to one side and into which the outlet part of the drain path of the sanitary facility equipment is inserted from one end; a primary-side elastic seal which keeps watertightness between the primary-side cylinder part and the drain path of the sanitary facility equipment; a secondary-side cylinder part which is extended from the flange to the other side and has one end linked to the other end of the primary-side cylinder part and the other end inserted into the intake part of the drain pipe; and a secondary-side elastic seal which keeps watertightness between the secondary-side cylinder part and the drain pipe. The primary-side elastic seal has an outer peripheral part fitted around the primary-side cylinder part and an inner peripheral lip extended into the primary-side cylinder part while connecting with the outer peripheral part, and the secondary-side elastic seal has a main body part fitted around the secondary-side cylinder part and a ring-shaped outer peripheral lip extended from the outer periphery of the main body part.

Description

  The present invention relates to a pipe connection device, and more particularly to a pipe connection device that connects an outlet part of a drainage channel of a sanitary equipment and an inlet part of a drainage pipe provided in a building frame.

  Conventionally, as a pipe connection device that connects the outlet of a drainage channel of a sanitary equipment such as a flush toilet and the inlet of a drainage pipe provided in a building frame, the outlet of the drainage channel of the sanitary equipment is on one end side. It is known that it is inserted and connected, and the other end is inserted into the inlet portion of the drainage pipe and bonded and fixed with an adhesive (for example, see Patent Document 1).

JP 2007-162305 A

  In the pipe connection device described above, when it is necessary to remove the pipe connection device in order to perform maintenance such as replacement of parts and urine stone removal in the drainage pipe, the other end side is connected to the inlet of the drainage pipe by an adhesive. Since it is bonded and fixed, there is a problem that it takes time to remove. Furthermore, since the other end side is bonded and fixed with an adhesive, a different pipe connection device is required for each diameter of the drainage pipe. Therefore, it is necessary to select a pipe connection device for each site at the time of installation, which is troublesome. There was a problem.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a pipe connection device that can be easily detached and attached.

  The present invention is a pipe connection device that connects an outlet portion of a drainage channel of a sanitary equipment and an inlet portion of a drainage pipe provided in a building frame, and a flange fixed to an installation surface of the building frame; A primary side tube portion that extends from the flange to one side and into which the outlet portion of the drainage channel of the sanitary equipment is inserted from one end, and the primary side tube portion and the drainage channel of the sanitary facility device A primary-side elastic seal that maintains watertightness between the outlet portion and the other end extending from the flange to the other, one end communicating with the other end of the primary-side tube portion, and the other end being the inlet of the drainage pipe A secondary side cylinder part inserted into the part, and a secondary side elastic seal that maintains watertightness between the secondary side cylinder part and the inlet part of the drainage pipe, and the primary side elastic seal is , An outer peripheral portion fitted on one end side of the primary side cylindrical portion, and the outer periphery And an inner peripheral lip extending inwardly toward the inner side of the primary side cylindrical portion, and the secondary elastic seal is fitted on the other end side of the secondary side cylindrical portion. A pipe connection device having a main body and a ring-shaped outer peripheral lip extending from the outer periphery of the main body.

In the present invention configured as described above, the outlet portion of the drainage channel of the sanitary equipment device can be inserted into the primary side cylindrical portion, and the secondary side cylindrical portion can also be inserted into the inlet portion of the drainage pipe By inserting, the outlet part of the drainage channel of the sanitary equipment and the inlet part of the drainage pipe can be connected. Therefore, there is no need for fixing with an adhesive, and the pipe connecting device can be easily removed when it is necessary to remove the pipe connecting device such as performing maintenance of the drain pipe.
Moreover, since the primary side elastic seal has an inner peripheral lip, the pipe connection device can be used not only for the outlet portion of the drainage channel of a certain size of sanitary equipment but also for outlet portions of various diameters. Similarly, since the secondary elastic seal has an outer peripheral lip, the pipe connection device can be used not only for an inlet portion of a drain pipe having a certain diameter but also for an inlet portion having various diameters. Therefore, it is not necessary to confirm the diameter of the drainage channel or drainage pipe of the sanitary equipment when attaching the pipe connection device, so that it does not take time.

  The present invention further includes a guide portion that guides the insertion of the secondary side cylindrical portion into the inlet portion of the drainage pipe that protrudes from the installation surface, and the secondary cylindrical portion is the guide portion. It is good also as a structure which stands upright from the said flange toward the direction inserted in the said inlet part of drainage piping, and externally fits the said inlet part of the said drainage piping.

  In the present invention configured as described above, since the insertion of the secondary side cylinder part to the inlet part of the drainage pipe is guided by the guide part, the insertion work can be easily performed, and the pipe connection device can be attached. It does not take time and effort. Moreover, since the guide part externally fits the inlet part of the drainage pipe, axial misalignment between the axis of the secondary side cylinder part and the axis of the inlet part of the drainage pipe is suppressed.

  In the present invention, the guide portion may further include a gap formed between a tip of the guide portion and the installation surface in a state where the secondary side cylinder portion is inserted into the inlet portion of the drain pipe. It is good.

  In this invention comprised in this way, the contact of a guide part and an installation surface is suppressed, and the rattling at the time of attachment is prevented. Moreover, since the required precision with respect to the smoothness of the entrance part of the drainage piping which protruded from the installation surface and the installation surface is eased, workability improves.

  In the present invention, the primary side tube portion is provided to be movable in a direction orthogonal to the axial direction in a state where the outer peripheral portion of the primary side elastic seal is fitted, and the primary side tube It is good also as a structure which has a restriction | limiting part which restrict | limits the movement of a part.

  In the present invention configured as described above, the primary side tubular portion is movable in the direction orthogonal to the axial direction and has a restricting portion for restricting the movement, so that the drainage channel of the sanitary equipment is provided. When the outlet part is inserted into the primary cylinder part, the primary cylinder part can be moved. For this reason, the required accuracy with respect to the displacement at the time of insertion is relaxed, so that workability is improved.

  In the present invention, the one end of the secondary side cylinder part may have a tapered shape in which the flow path is reduced in a direction in which the secondary side cylinder part is inserted into the inlet part of the drain pipe.

  In the present invention configured as described above, even if the shaft center of the outlet portion of the drainage channel of the sanitary equipment is shifted from the shaft center of the drainage socket, the drainage from the drainage channel is guided smoothly by the taper shape. Can be drained.

  This invention is also a flush toilet provided with the said piping connection apparatus.

  In the present invention configured in this way, when it is necessary to remove the pipe connection device such as maintenance of the drainage pipe, the outlet of the drainage channel of the flush toilet can be easily detached from the pipe connection device, The pipe connecting device can also be easily detached from the drain pipe.

  According to the pipe connection device of the present invention, it is possible to easily remove and attach the pipe connection device.

Sectional drawing which shows the urinal which concerns on one Embodiment of this invention. Sectional drawing which shows the piping connection apparatus which concerns on one Embodiment of this invention. The exploded view which shows the piping connection apparatus which concerns on one Embodiment of this invention. Sectional drawing which shows the attachment process of the piping connection apparatus which concerns on one Embodiment of this invention.

  Hereinafter, a urinal and a pipe connection device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a urinal according to an embodiment of the present invention. FIG. 2 is a sectional view showing a pipe connection device according to an embodiment of the present invention, and FIG. 3 is an exploded view showing the pipe connection device according to an embodiment of the present invention.

  As shown in FIG. 1, a urinal 1 according to an embodiment of the present invention includes a urinal body 4 placed on a floor surface 2, an outlet 6 of a drainage channel of the urinal body 4, and a building housing. And a pipe connection device 100 for connecting the inlet 8 of the drainage pipe provided.

  As shown in FIGS. 2 and 3, the pipe connection device 100 according to an embodiment of the present invention includes a drain socket 120, a primary elastic seal 140 and a secondary elastic seal 160 provided in the drain socket 120, And a hose band 180 for fixing the primary elastic seal 140 to the drain socket 120.

  The drain socket 120 includes a flange 122 extending outward (left and right direction in FIG. 2), a primary side tubular portion 124 extending from the flange 122 toward one side (upward in FIG. 2), and a flange 122. 2 to the other side (downward in FIG. 2). Further, the drain socket 120 has a guide portion 128 that extends from the flange 122 toward the other side on the outer peripheral side of the secondary side cylindrical portion 126. In addition, in this embodiment, although the primary side cylinder part 124, the flange 122, and the secondary side cylinder part 126 are formed separately, this invention is not limited to such a structure. For example, it is good also as a structure by which the primary side cylinder part 124, the flange 122, and the secondary side cylinder part 126 are integrally formed.

  The flange 122 includes a flange main body 122a, a standing wall portion 122b with which the primary elastic seal 140 is engaged, and a plurality of fixing surfaces 122c that come into contact with the installation surface in order to fix the flange 122 to the installation surface of the building frame described later. Have.

  The standing wall portion 122b is a cylindrical convex portion that is erected from one surface of the flange 122 (the upper surface in FIG. 2). The fixing surface 122c is formed in a staircase shape at both ends (left and right ends in FIG. 2) in the extending direction of the flange main body 122a in a direction opposite to the standing wall portion 122b, and a screw hole is formed. ing.

  The primary side cylinder part 124 is formed in a cylindrical shape with both ends (vertical direction in FIG. 2) opened, and is provided inside the standing wall part 122 b of the flange 122. Further, as will be described in detail later, the outlet portion 6 of the drainage channel of the urinal body 4 is inserted into the primary side cylindrical portion 124 from the one end side (the upper end side in FIG. 2), and the other end side engages with the flange 122. A part of the outer peripheral wall on the other end side of the primary side cylindrical portion 124 is inclined so that the thickness of the wall surface increases toward the other end. Furthermore, the primary side cylinder part 124 is movable toward the direction orthogonal to the axial direction, that is, toward the standing wall part 122b.

  The secondary side cylindrical portion 126 extends from the flange 122 in the opposite direction to the vertical wall portion 122b on the inner side of the vertical wall portion 122b of the flange 122 and the primary side cylindrical portion 124 in the state provided on the flange 122, and has both ends ( It is formed in a cylindrical shape having an opening in the vertical direction in FIG. In addition, the secondary side cylinder part 126 is provided concentrically with the primary side cylinder part 124 in the state provided in the standing wall part 122b and the flange 122. Further, one end (upper end in FIG. 2) of the secondary side cylindrical portion 126 communicates with the other end (lower end in FIG. 2) of the primary side cylindrical portion 124, and the other end (lower end in FIG. 2) will be described in detail later. Is inserted into the entrance of the drainage pipe provided in the building frame. The end portion on the flange 122 side of the secondary side cylindrical portion 126 is a tapered portion that has a tapered shape that reduces the diameter of the flow path inside the secondary side cylindrical portion 126 from one side to the other (from the upper side to the lower side in FIG. 2). 126a is formed.

  The guide portion 128 is a cylindrical shape that is erected from a surface opposite to a surface on which the standing wall portion 122b of the flange 122 is erected on the inner side of the standing wall portion 122b of the flange 122 and the outer side of the secondary side cylindrical portion 126. It is a convex part. The guide portion 128 is provided concentrically with the standing wall portion 122b and the secondary side cylindrical portion 126. Although the details will be described later, the guide portion 128 is formed with a diameter capable of fitting the inlet portion of the drainage pipe protruding from the installation surface. Further, the guide portion 128 is formed such that the tip of the guide portion 128 (the lower end in FIG. 2) is located closer to the flange body 122 a than the fixing surface 122 c of the flange 122. With such a configuration, when the pipe connection device 100 is installed on the installation surface, a gap 500 can be formed between the tip of the guide portion 128 and the installation surface. In the present embodiment, the guide portion 128 is formed in a cylindrical shape, but the present invention is not limited to such a configuration. For example, it is good also as a structure formed in the shape which provided the notch ranging from the front-end | tip to the base end of the guide part 128 formed in the cylindrical shape.

  The primary side elastic seal 140 includes an outer peripheral part 142 that is externally fitted to the primary side cylindrical part 124, an inner peripheral lip 144 that extends continuously inward from the outer peripheral part 142, and a continuous outer peripheral part 142. It has the extended part 146 extended outside, and the outermost periphery 148 extended continuously with this extended part 146. As shown in FIG.

  The outer peripheral part 142 is formed in a cylindrical shape, and is fitted on one end side (the upper end side in FIG. 2) of the primary side cylindrical part 124. The inner peripheral lip 144 is continuously extended inward from one end (the upper end in FIG. 2) of the outer peripheral portion 142, and when the outer peripheral portion 142 is externally fitted to the primary side cylindrical portion 124, It is formed so as to enter the inside of the primary side cylindrical portion 124 through an opening end on one end side (upper end in FIG. 2). The inner peripheral lip 144 has a tapered shape that reduces the diameter of the flow path inside the primary side cylindrical portion 124 from one side to the other (from the upper side to the lower side in FIG. 2). The extending portion 146 is continuously extended from one end of the outer peripheral portion 142 outward in a wave shape. The outermost peripheral portion 148 extends from the outermost end of the extending portion 146, and the outer peripheral portion is so fitted as to externally fit the standing wall portion 122 b of the flange 122 when the outer peripheral portion 142 is externally fitted to the primary side cylindrical portion 124. 142 is formed in a concentric cylindrical shape. With such a configuration, when the primary side cylindrical portion 124 moves in a direction perpendicular to the axial direction, the wave-like extending portion 146 extends inward or contracts outward. Thus, the movement of the primary side cylindrical portion 124 is guided and restricted. That is, the outermost peripheral part 148 and the standing wall part 122b of the flange 122 function as a restricting part that restricts the movement of the primary side cylindrical part 124.

  In the present embodiment, the inner peripheral lip 144 is formed in a tapered shape, but the present invention is not limited to such a configuration. For example, it extends toward the inside of the primary side cylinder part 124, but does not enter the inside of the primary side cylinder part 124, and the extending direction is an opening on one end side (upper end side in FIG. 2) of the primary side cylinder part 124. It is good also as a structure formed so that it may become parallel to an end surface.

  The secondary elastic seal 160 has a main body portion 162 that is externally fitted to the secondary side cylindrical portion 126, and a ring-shaped outer peripheral lip 164 that extends from the outer periphery of the main body portion 162. The main body portion 162 is formed in a cylindrical shape, and is fitted on the other end side (lower end side in FIG. 2) of the taper portion 126a in the secondary side cylindrical portion 126. When the main body part 162 is externally fitted to the secondary side cylindrical part 126 at the other end (the lower end in FIG. 2) of the main part 162, the other end side (the lower end side in FIG. 2) of the secondary side cylindrical part 126. A convex portion with which the opening end face abuts is erected inward. In addition, a plurality of outer peripheral lips 164 are provided on the main body 162, and by providing a plurality of outer peripheral lips 164 in this manner, watertightness can be maintained.

  The hose band 180 is formed in an annular shape and further fits the outermost peripheral portion 148 of the primary side elastic seal 140 that fits the standing wall portion 122 b of the flange 122. The hose band 180 has a tightening portion (not shown), and operates the tightening portion to tighten the outermost peripheral portion 148 from the outside.

  Next, with reference to FIG. 4, the attachment of the pipe connection device 100 according to an embodiment of the present invention will be briefly described. 4 (a) to 4 (d) are cross-sectional views showing a process for attaching the pipe connection device 100 according to one embodiment of the present invention.

  As shown to Fig.4 (a), the entrance part 8 of the drain piping provided in the building frame protrudes from the floor surface 2 which is an installation surface where the pipe connection apparatus 100 is attached by predetermined length. As shown in FIGS. 4A and 4B, the secondary side tubular portion 126 of the pipe connecting device 100 is inserted from above into the drain pipe inlet 8 while being guided by the guide 128. . At this time, the outer peripheral lip 164 of the secondary side elastic seal 160 is deformed by the inner peripheral wall of the inlet 8 of the drainage pipe, and the tip thereof faces upward. Due to the deformation of the outer peripheral lip 164, the watertightness between the inlet 8 of the drainage pipe and the secondary cylinder 126 is maintained. Further, as shown in FIG. 4B, the guide part 128 externally fits the inlet part 8 of the drainage pipe and forms a gap 500 between the tip of the guide part 128 and the floor surface 2.

  As shown in FIG. 4 (b), the fixing surface 122 c of the flange 122 contacts the floor surface 2 in a state where the secondary side cylindrical portion 126 is inserted into the inlet portion 8 of the drain pipe. As shown in FIGS. 4B and 4C, the screw 600 is inserted into the screw hole formed in the fixing surface 122 c of the flange 122, and the flange 122 is fixed to the floor surface 2.

  Next, as shown in FIG. 4 (d), the outlet 6 of the drainage channel of the urinal 1 is inserted into the primary cylinder 124 from above. At this time, the inner peripheral lip 144 of the primary side elastic seal 140 is deformed by the outer peripheral wall of the outlet portion 6 of the drainage channel of the urinal body 4 and pressed against the inner peripheral wall of the primary side cylindrical portion 124. Due to the deformation of the inner peripheral lip 144, the watertightness between the outlet part 6 of the drainage channel of the urinal body 4 and the primary side cylinder part 124 is maintained.

  In addition, in this embodiment, although the outlet part 6 of the drainage channel of the urinal 1 is inserted into the pipe connection device 100, the sanitary equipment to which the pipe connection device 100 according to the present invention is applied is limited to the urinal. Is not to be done. For example, it is good also as a structure which applies the pipe connection apparatus 100 to a toilet bowl, dirty logistics, etc. Moreover, although the installation surface which installs the pipe connection apparatus 100 in this embodiment was made into the floor surface 2, the installation surface of the pipe connection apparatus in this invention is not restricted to a floor surface, but the entrance part of the drain piping provided in the building frame A wall surface or the like may be used as long as it exists. Furthermore, the pipe connection device according to the present invention can be attached to an inlet portion of a drain pipe that does not protrude from the installation surface.

  According to the pipe connection device 100 according to the embodiment of the present invention described above, the outlet portion 6 of the drainage channel of the urinal 1 is inserted into the primary side tubular portion 124, and further to the inlet portion 8 of the drainage pipe. Even if it inserts the secondary side cylinder part 126, the outlet part 6 of the drainage channel of the urinal 1 and the inlet part 8 of drainage piping can be connected. Therefore, there is no need for fixing with an adhesive, and the pipe connection device 100 can be easily detached and maintenance can be easily performed when the drainage pipe is maintained. Moreover, since it is not necessary to perform adhesion | attachment also when attaching the piping connection apparatus 100, it can attach easily and it does not need time for attachment and can improve workability | operativity.

  Furthermore, since the primary elastic seal 140 has the inner peripheral lip 144, the pipe connection device 100 can be used not only for the outlet portion of the drainage channel of a urinal having a certain diameter but also for outlet portions having various diameters. Similarly, since the secondary side elastic seal 160 has the outer peripheral lip 164, the pipe connection device can be used not only for the inlet portion of the drain pipe having a certain diameter but also for the inlet portions having various diameters. Therefore, since it is not necessary to confirm the diameter of the drainage channel of the urinal and the drainage pipe when attaching the pipe connection device 100, it is not time-consuming and the installation of the pipe connection device 100 does not require time. Can be improved.

  In addition, according to the pipe connection device 100 according to the embodiment of the present invention described above, the insertion of the secondary side cylinder part 126 to the inlet part 8 of the drainage pipe is guided by the guide part 128, so that the insertion work is easy. It can be carried out easily, and installation of the pipe connection device 100 does not take time. Further, the guide portion 128 and the secondary side cylindrical portion 126 are formed concentrically, and the guide portion 128 externally fits the inlet 8 of the drainage pipe. Axis deviation from the axis of the inlet portion 8 is suppressed. Therefore, the secondary side elastic seal 160 can more reliably maintain the watertightness between the inlet portion 8 of the drainage pipe and the secondary side cylindrical portion 126. In addition, even when the shaft is displaced, the outer lip 164 can maintain the water tightness between the secondary side cylindrical portion 126 and the inlet portion 8 of the drainage pipe.

  Furthermore, according to the pipe connection device 100 according to the embodiment of the present invention described above, the gap 500 is formed between the tip of the guide portion 128 and the floor surface 2. Contact is suppressed, and rattling during installation is prevented. Moreover, since the required precision with respect to the smoothness of the inlet part 8 of the drain pipe which protruded from the floor surface 2 and the floor surface 2 is eased, workability | operativity can be improved further.

  In addition, according to the pipe connection device 100 according to the embodiment of the present invention described above, the primary side tubular portion 124 can move in a direction orthogonal to the axial direction thereof, so that the drainage of the urinal body 4 is performed. When the outlet portion 6 of the road is inserted into the primary side cylindrical portion 124, the primary side cylindrical portion 124 can be moved. Further, since the movement is limited by the standing wall portion 122b, the extending portion 146 of the primary side elastic seal 140, and the outermost peripheral portion 148, the state of communication with the secondary side cylindrical portion 126 is maintained. Therefore, since the required accuracy with respect to the position shift at the time of inserting the outlet part 6 of the drainage channel of the urinal body 4 to the primary side cylindrical part 124 is eased, the workability can be improved.

  Furthermore, according to the pipe connection device 100 according to the embodiment of the present invention described above, the inner peripheral lip 144 of the primary side elastic seal 140 extends toward the inside of the primary side cylindrical portion 124, so When the outlet portion 6 of the drainage channel of the toilet body 4 is inserted into the primary side tubular portion 124, the outlet portion 6 and the primary portion are also displaced when the axial center of the outlet portion 6 and the axial center of the primary side tubular portion 124 are misaligned. Watertightness with the side tube portion 124 is maintained. Furthermore, since the end of the secondary side cylindrical portion 126 on the flange 122 side is a tapered portion 126a having a tapered shape in which the inner flow path is reduced in diameter toward the downstream side, the axis of the outlet portion 6 and the primary side Even when the axis of the cylindrical portion 124 is misaligned, the waste water flowing into the drain socket 120 from the outlet portion 6 can be smoothly discharged into the inlet portion 8 of the drain pipe by the tapered portion 126a.

DESCRIPTION OF SYMBOLS 1 ... Urinal 2 ... Floor surface 4 ... Urinal body 6 ... Outlet part of drainage channel of urinal 8 ... Inlet part of drainage pipe 100 ... Pipe connection device 120 ... Drainage socket 122 ... Flange 122a ... Flange body 122b ... Standing wall part 122c ... Fixed surface 124 ... Primary side cylindrical portion 126 ... Secondary side cylindrical portion 126a ... Tapered portion 128 ... Guide portion 140 ... Primary side elastic seal 142 ... Outer peripheral portion 144 ... Inner peripheral lip 146 ... Extended portion 148 ... Outermost peripheral portion 160 ... Secondary side elastic seal 162 ... Main body 164 ... Outer peripheral lip 200 ... Inlet part of drainage pipe 500 ... Gap 600 ... Screw

Claims (6)

A pipe connection device for connecting an outlet of a drainage channel of a sanitary equipment and an inlet of a drainage pipe provided in a building frame,
A flange fixed to an installation surface of the building frame;
A primary tube portion that is extended from the flange to one side and into which the outlet portion of the drainage channel of the sanitary equipment is inserted from one end,
A primary-side elastic seal that maintains watertightness between the primary-side tube portion and the outlet portion of the drainage channel of the sanitary equipment device;
The secondary side cylinder part extended from the flange to the other, one end communicating with the other end of the primary side cylinder part, and the other end inserted into the inlet part of the drainage pipe,
A secondary side elastic seal that maintains water tightness between the secondary side cylinder part and the inlet part of the drainage pipe,
The primary-side elastic seal includes an outer peripheral portion fitted on one end side of the primary-side tube portion, an inner peripheral lip extending continuously toward the inner side of the primary-side tube portion. Have
The secondary-side elastic seal is a pipe connection device having a main body part fitted on the other end side of the secondary-side tube part, and a ring-shaped outer peripheral lip extending from the outer periphery of the main body part. A guide portion for guiding insertion of the secondary side cylinder portion into the inlet portion of the drainage pipe protruding from the installation surface;
The guide portion is erected from the flange in a direction in which the secondary cylinder portion is inserted into the inlet portion of the drain pipe, and externally fits the inlet portion of the drain pipe. Piping connection equipment.   The pipe according to claim 2, wherein the guide part forms a gap between a tip of the guide part and the installation surface in a state where the secondary side cylinder part is inserted into the inlet part of the drain pipe. Connected device.   In a state where the outer peripheral portion of the primary side elastic seal is externally fitted, the primary side cylindrical portion is provided so as to be movable in a direction orthogonal to the axial direction, and the movement of the primary side cylindrical portion is restricted. The pipe connection device according to any one of claims 1 to 3, further comprising a restricting portion.   The one end of the secondary side cylinder part is a taper shape in which a flow path diameter-reduces toward the direction where the secondary side cylinder part is inserted in the inlet part of the drainage pipe. The pipe connection device according to item 1.   A flush toilet comprising the pipe connection device according to any one of claims 1 to 5.