JP2013224515A - Nozzle attachment structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nozzle capable of being easily attached to/detached from a horizontal drain pipe when nozzle maintenance work is performed.SOLUTION: A structure for attaching a nozzle (100) for emitting a jet of washing water into a drain pipe (3) communicating with a toilet bowl includes: a guide cylinder (110) which passes through an opening (35) formed on a peripheral surface of the drain pipe (3) and which has a passage (110a) in an axial direction; a nozzle body (130) which has a shank (133) for being fitted and inserted into the passage (110a) of the guide cylinder (110); and a locking body (200) which is interposed and inserted between the shank (133) of the nozzle body (130) and the passage (110a) of the guide cylinder (110).

Description

  The present invention relates to a nozzle mounting structure.

  2. Description of the Related Art A cleaning system in a public toilet or the like is generally equipped with an automatic water washing device. In this cleaning system, for example, a human sensor using infrared light is provided at the top of each urinal, and each urinal is controlled by controlling the water supply electromagnetic valve each time the urinal is used according to a detection signal from the human sensor. Perform individual cleaning.

  The water used for the individual cleaning is discharged in the downstream direction of the drainage horizontal pipe and flows toward the sewage pipe after passing through the horizontal drainage pipe. In other words, the drainage horizontal pipe is a pipe for discharging excrement accumulated in the toilet bowl outside the site. The drainage horizontal pipe is connected to the lower rear part of the toilet body using a drainage connection adapter or elbow which is a bellows-like pipe. And the edge part on the opposite side to a toilet bowl main body is extended toward the said sewage pipe among drainage horizontal draw pipes.

  A drain pipe cleaning nozzle for jet cleaning the inside of the drain horizontal pipe is connected to a predetermined position. Then, the water is ejected from the drain pipe cleaning nozzle, thereby suppressing the stagnation of waste water including excrement and cleaning water in the drain horizontal pipe.

Japanese Patent Laid-Open No. 05-141581

By the way, until now, when performing the maintenance work of the drain pipe cleaning nozzle, there has been nothing that allows the nozzle to be easily detached from the drain horizontal pipe.
The present invention has been made in view of such circumstances, and the problem to be solved is to provide a nozzle mounting structure that can be easily attached to and detached from the drainage horizontal pipe when performing maintenance work on the nozzle. It is to provide.

In order to solve the above problems, the present invention employs the following means.
That is, the present invention is a nozzle mounting structure for injecting wash water into a drain pipe communicating with a toilet, and has a guide cylinder that penetrates an opening formed in the peripheral surface of the drain pipe and has a passage in the axial direction; A nozzle body having a shaft portion inserted into the passage of the guide tube; and a locking body inserted between the shaft portion of the nozzle body and the passage of the guide tube, and the guide tube includes the opening portion. A bulging portion having a larger diameter than the bulging portion, and a hanging portion that is connected to the bulging portion and has the same or smaller diameter as the opening, and the passage is formed inwardly of the bulging portion and the hanging portion, The locking body is associated with a main body portion that abuts on the shaft portion of the nozzle main body, an expansion portion that protrudes outward from a lower portion of the main body portion, and a nozzle main body and a guide tube that are provided on the upper portion of the main body portion. And when the nozzle body is attached to the drain pipe, the shaft part of the nozzle body and the locking body The body part abuts, the engaging part of the latching body engages with the nozzle body and the guide tube, the widened part of the latching body abuts the inner wall of the drainage channel of the drainage pipe, and the nozzle body is fixed to the opening. The nozzle mounting structure is characterized by the above.

Further, a plurality of the locking bodies may be inserted along the periphery of the shaft portion of the nozzle body.
Furthermore, a cutout portion having a diameter larger than that of the expanded portion is provided on a side surface of the hanging portion of the guide tube, and the expanded portion may protrude outwardly through the cutout portion.

The guide tube and the nozzle body are engaged by a nut.
Furthermore, a mark for informing the direction of the injection hole of the nozzle body may be provided on the nozzle body to determine the correct direction of the injection hole.

  Further, the present invention is a method of mounting a nozzle for injecting washing water into a drain pipe communicating with a toilet, and a guide cylinder having a passage in an axial direction penetrating through an opening formed in a peripheral surface of the drain pipe, A nozzle body having a shaft portion inserted into the passage of the guide tube; and a locking body inserted between the shaft portion of the nozzle body and the passage of the guide tube. The guide tube is formed from the opening. A bulging portion having a large diameter and a hanging portion that is connected to the bulging portion and has the same or a small diameter as the opening, and the passage is formed inside the bulging portion and the hanging portion, The locking body is engaged with the nozzle body and the guide tube provided at the upper part of the main body part, the main body part contacting the shaft part of the nozzle main body, the expanding part protruding outward from the lower part of the main body part, The assembly of the assembly member having the engaging portion is (a) the guide tube protrudes from the opening, and the bulging portion protrudes outward from the drain pipe. A step of attaching the hanging part to face the drain pipe, (b) a step of incorporating the engaging body into the guide tube, and a step of incorporating the expanding part into the drain pipe, and (c) the nozzle body into the guide tube, And a step of engaging the locking body with the bulging portion of the nozzle body and the guide tube.

  In performing the maintenance work of the nozzle, it becomes easy to attach and detach the nozzle to the drainage horizontal pipe.

1 is an overall configuration diagram of a cleaning system that employs a nozzle mounting structure according to the present invention. It is a perspective view which shows the state which attached the drain pipe washing nozzle which concerns on this invention to the drainage horizontal draw pipe. FIG. 3 is a partially cutaway exploded perspective view of FIG. 2 and a partially enlarged view. It is a partially notched front view which shows the state immediately before putting a nozzle main body into a guide part. It is a partially notched front view which shows the state which put the nozzle main body in the guide part. It is the top view seen from the arrow V direction of FIG. 4B. It is the bottom view seen from the arrow VI direction of FIG. 4B. It is a figure which shows the assembly procedure of the waste_water | drain washing nozzle which concerns on this invention, and is a figure which shows the state which lets a nail | claw pass through a guide part before letting a guide part pass through the through-hole of a horizontal drain pipe. FIG. 8 is a view continued from FIG. 7, and shows a state where a guide portion through which a claw is passed is put in a through hole of a drainage horizontal draw pipe. FIG. 9 is a diagram continued from FIG. 8, and is a diagram in which a nozzle body is about to be inserted into a guide portion. FIG. 10 is a diagram continued from FIG. 9 and shows a state in which the nozzle body is inserted in the guide portion. FIG. 11 is a diagram continued from FIG. 10, and shows a state in which packing is passed through the guide portion in the state of FIG. 10. FIG. 12 is a view continued from FIG. 11, and shows a state in which the packing is pressed on the guide portion through which the packing is passed. FIG. 13 is a diagram continued from FIG. 11, and shows a state where a nozzle press is further passed through the guide portion in the state of FIG. 12.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be exemplarily described based on examples. However, the dimensions, materials, shapes, and relative arrangements of the component parts described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified.

  FIG. 1 is an overall configuration diagram of a cleaning system employing a nozzle mounting structure according to the present invention. The cleaning system 1 includes a plurality (four in this case) of male urinals 2A, 2B, 2C, and 2D that are connected to a wall surface of a building at predetermined intervals (here, equal intervals).

  Moreover, this washing | cleaning system 1 is extended in the connection direction of these urinals 2A, 2B, 2C, 2D, and excrement and flow volume discharged | emitted from the urinals 2A-2D through a toilet drain pipe (not shown). The drainage horizontal draw pipe 3 is a pipe that conveys the restricted wash water from upstream to downstream.

  The horizontal drainage pipe 3 takes the form of wall drainage by the piping in the wall, and in order to suppress the retention of wastewater including excrement and washing water, a specific gradient angle (for example, 2/100) from the upstream direction to the downstream direction. ) Is attached.

  And the washing | cleaning system 1 is installed in the predetermined several positions 31,32,33,34 among the 1st water distribution pipe 4 which distributes washing water to the urinals 2A-2D, and the drainage horizontal drawing pipe 3, and is 2nd. And a second water distribution pipe 5 for distributing a specific amount of washing water.

  One end of the first water distribution pipe 4 is connected to a water supply main pipe (not shown), and the other end communicates with a water supply path (not shown) formed in the urinals 2A to 2D. The second water distribution pipe 5 has one end connected to the first water distribution pipe 4 and the other end connected to the predetermined positions 31 to 34 of the drainage horizontal draw pipe 3. In addition, you may make it connect the end of the 2nd water distribution pipe 5 to the water supply main pipe similarly to the 1st water distribution pipe 4 instead of connecting to the 1st water distribution pipe 4. Through holes 35 are formed in the plurality of positions 31 to 34 of the horizontal drainage pipe 3 (see FIG. 3). A drain pipe cleaning nozzle 100 is connected to each through hole 35 (see FIGS. 2 and 3). The drain pipe cleaning nozzle 100 will be described later.

  The cleaning system 1 includes a first control valve unit 6A, 6B, 6C, 6D that is interposed in the middle of the first water distribution pipe 4 and controls the individual supply of cleaning water to the urinals 2A to 2D. And a second control valve unit 7 </ b> A, 7 </ b> B, 7 </ b> C, 7 </ b> D that controls the individual supply of washing water to a plurality of predetermined positions 31 to 34 of the drainage horizontal draw pipe 3.

  Each of the first control valve units 6A to 6D includes a first electromagnetic valve. And according to the command (instruction signal) from control device 10A, 10B, 10C, 10D, 1st electromagnetic valve 6A, 6B, 6C, 6D is opened and closed, and the separate supply of the wash water to urinals 2A-2D is carried out. Made.

  Each of the second control valve units 7A to 7D includes a second electromagnetic valve. And according to the instruction | command from control apparatus 10A-10D, a 2nd solenoid valve is opened and closed, and the separate supply of the washing water to the predetermined several positions 31-34 of the drainage horizontal draw pipe 3 is made.

  In addition, the cleaning system 1 includes user detection units 8A, 8B, 8C, and 8D that detect the presence state of each urinal user. The user detection units 8A to 8D are human sensors using infrared rays. In this specification, it is provided in the housing | casing of the wall surface arrangement | positioning which accommodates control apparatus 10A-10D in the upper part of each urinal. Control device 10A-10D commands washing | cleaning whenever a user uses each urinal according to the detection signal from user detection part 8A-8D.

Next, the drain pipe cleaning nozzle 100 employed in the cleaning system 1 will be described in detail with reference to the drawings.
The drain pipe cleaning nozzle 100 is passed through a through hole 35 (see FIG. 3) formed in a direction perpendicular to the longitudinal direction of the drain horizontal pipe 3. The drain pipe cleaning nozzle 100 includes a guide part 110 having a through hole 110a, a nozzle body 130 that passes through the through hole 110a of the guide part 110, and a water leak from the through hole 35 of the drain horizontal pipe 3. , A packing presser 170 for applying pressure to the packing 150 from above, a nozzle presser 190 for fixing the nozzle body 130 to the drainage horizontal pipe 3, and the penetration of the guide part 110. It consists of a plurality of (here, two) claws 200 that engage with the drainage channel inner wall of the drainage horizontal pipe 3 through the hole 110a. These parts are arranged concentrically so as to share the central axis C of the through-hole 35 (see FIGS. 2 and 3).

  The guide portion 110 includes a large-diameter portion 111 and a small-diameter portion 112 formed below the large-diameter portion 111 (see FIG. 3). The large diameter portion 111 and the small diameter portion 112 are formed with the through hole 110a extending in the axial direction (see FIG. 3). Among the through holes 110a, the through holes 110a formed in the large diameter portion 111 and the through holes 110a formed in the small diameter portion 112 have different sizes, and the former is larger. Therefore, a stepped portion d is generated between the large diameter portion 111 and the small diameter portion 112 (see FIGS. 3, 4, and 7). A screw groove 113 is formed on the outer peripheral surface of the large diameter portion 111. The small diameter portion 112 is a portion that is inserted into the through hole 35 of the drainage horizontal pipe 3 in the guide portion 110. When the small-diameter portion 112 is inserted into the through hole 35, the guide portion 110 is positioned so that the tip of the small-diameter portion 112 is located within the thickness of the drainage horizontal draw pipe 3 in which the through hole 35 is formed. Is defined (see FIG. 4). The small-diameter portion 112 is formed with a pair of kerfs 115 that are line-symmetric with respect to the central axis C (see FIG. 3). The pair of kerfs 115 face part of the large diameter portion 111. Further, the kerf 115 is larger than the claw 200.

  The nozzle main body 130 is connected to the second water distribution pipe 5 (see FIGS. 1 and 2) through the connection portion 131 (see FIG. 3) and the through hole 35 of the drainage horizontal pipe 3 through the guide portion 110. The insertion portion 133 is inserted (see FIGS. 3 and 4). The connecting portion 131 and the insertion portion 133 have different diameters. And the step part 133a (refer FIG. 4b) is formed by the diameter difference. The stepped portion 133a will be described later.

  In addition, the connection portion 131 and the insertion portion 133 are formed with a through-hole 134 that extends in the axial direction of the nozzle and has a large upper end and a small lower end (see FIG. 4). The length of the nozzle body 130 is such that when the drain pipe cleaning nozzle 100 is assembled into the through hole 35 of the drainage horizontal drawing pipe 3, the upper end portion and the lower end portion of the nozzle body 130 are the drainage horizontal drawing pipe 3. The length is set so as to protrude from the through hole 35.

  Here, the term “upper and lower” refers to the upper side when the drainage pipe cleaning nozzle 100 is attached to the drainage horizontal pipe 3, and the lower side is also referred to as the lower side.

  The through hole 134 of the nozzle body 130 includes a large diameter hole 131b and a small diameter hole 131s (see FIG. 4). Then, approximately 1/4 of the axial length of the connecting portion 131 of the nozzle body 130 is the large-diameter hole 131b (see FIG. 4), and approximately 3/4 of the length is the small-diameter hole 131s. (See FIG. 4). An injection hole (not shown) is formed at the lower end of the small-diameter hole 131s. The injection hole is for jet-injecting water supplied from the second water distribution pipe 5 to thereby inject and wash the inside of the drainage horizontal draw pipe 3.

The large-diameter hole 131b is shaped like a truncated cone, and a thread groove 135 is formed on the inner peripheral surface thereof (see FIGS. 2 and 4). The thread groove 135 is a locking groove for connecting the second water distribution pipe 5 and the nozzle body 130. In the nozzle main body 130, a rectangular region denoted by reference numeral 131a formed in the connecting portion 131 is a locking surface for locking the teeth of a wrench (not shown), and a similar locking surface is also provided on the opposite side. 131a is formed (see FIGS. 2, 3, 5, etc.). Further, the longitudinal direction of the locking surface 131a is formed in the same direction as the direction in which the injection hole is opened, and the end edge of the locking surface 131a is at a position facing the longitudinal direction of the drainage horizontal draw pipe 3. At this time, the injection hole also faces the longitudinal direction of the drainage horizontal pipe 3. In addition, a hole (indicated by ●) is formed on one of the pair of edges of the locking surface 131a, and functions as a mark that informs the operator of the orientation of the injection hole in the drain pipe 3.

  In addition, a flange 131f is formed in the connection portion 131 of the nozzle body 130 at substantially the center in the axial direction (see FIGS. 3 and 4). An O-ring 135 and an O-ring attachment groove 137 to which the O-ring 135 is attached are formed near the lower portion of the flange 131f (see FIGS. 3 and 4).

  The packing 150 is disposed so as to surround the periphery of the guide portion 110 when the drain pipe cleaning nozzle 100 is assembled to the drainage horizontal pipe 3 and has a ring shape (see FIGS. 3 and 4). .

  A flange nut is applied to the packing retainer 170 and is screwed together at substantially the lower half of the screw groove 113 of the guide portion 110. Then, the packing 150 is pressed between the flange portion 172 and the outer peripheral surface of the drainage horizontal draw pipe 3 (see FIG. 4). Further, the diameter of the flange portion 172 and the diameter of the packing 150 are the same size.

  The nozzle retainer 190 is applied with an octagonal nut (owl nut), and is screwed with the screw groove 113 of the guide portion 110 at an upper portion thereof (see FIGS. 3 and 4). The advancement of the nozzle presser 190 in the axial direction is blocked by the flange 131f of the nozzle main body 130, and no further downward advancement is possible (see FIG. 4).

  The plurality of claws 200 described above are composed of the following three parts, and have a U-shape with a flat leg length in a longitudinal section. That is, the claw 200 includes the attachment portion 202, the leg portion 203, and the claw portion 204, which are integrally formed. The length of the leg portion 203 is significantly longer than the length of the attachment portion 202 and the claw portion 204.

  The size and shape of the claw 200 are determined so that the entire claw 200 can be inserted from the upper part of the through hole 110a of the guide part 110 toward the pair of cut grooves 115 (see FIG. 3). The claw 200 is inserted along the periphery of the insertion portion 133 of the nozzle body 130.

  The mounting portion 202 has a shape as if a part of a ring (ring) having a rectangular cross section is cut out, and the inner diameter thereof is the same as the outer diameter of the insertion portion 133 (see FIG. 3). .

  The leg portion 203 is formed to hang down from the attachment portion 202. In addition, the curvature is attached to the surface inside the leg part 203, The said curvature is the same as the curvature of the outer peripheral surface of the said insertion part 133 (refer FIG. 4).

  The nail | claw part 204 is a spatula-shaped protrusion part which is formed in the lower end of the leg part 203, and protrudes in the radial direction in the state orthogonal to the leg part 203 (refer FIG. 3, 4).

Next, a procedure for assembling such a drain pipe cleaning nozzle 100 will be described.
(A) A pair of claws 200 are inserted into the through holes 110a of the guide part 110 so that the claw parts 204 face downward (see FIG. 7). At this time, the guide part 110 and the pair of claws 200 are integrated so that the claw 200 enters the kerf 115 (see FIGS. 7 and 8). At this time, the pair of claws 200 are locked in a state in which their attaching portions 202 are in contact with the stepped portion d of the guide portion 110. As a result, the nail 200 is suspended as shown in FIG. 4A. The locking structure between the mounting portion 202 of the claw 200 and the stepped portion d of the guide portion 110 is referred to as a first locking structure.

  (B) Thereafter, the small-diameter portion 112 of the guide portion 110 including the claw 200 is inserted into the through hole 35 of the drainage horizontal pipe 3 (see FIG. 8). Then, the step part 133a of the nozzle body 130 is positioned on the step part d with the attachment part 202 of the claw 200 interposed therebetween. As a result, the claw 200 is changed from the state shown in FIG. 4A to the state shown in FIG. 4B by the lever principle, the engagement with the through hole 35 by the claw part 204 is confirmed, and the guide part 110 is connected to the drainage horizontal pipe. 3 is fixed. The length and diameter of the small-diameter portion 112 of the guide portion 110 are determined so that the small-diameter portion 112 is accommodated with the claw 200 interposed in the through hole 35 (FIG. 4).

  (C) The insertion portion 133 is passed through the through hole 110a of the guide portion 110 with the side where the insertion portion 133 of the nozzle body 130 is located downward (see FIGS. 9 and 10). At this time, the flange 131f of the nozzle main body 130 is in a state of substantially contacting the upper end edge 110t (see FIGS. 3 and 4) of the guide portion 110. For this reason, further progress of the nozzle body 130 is prevented (see FIG. 4), and in order to move backward, that is, to extract the nozzle body 130, the nut portion 190 is rotated in a loosening direction.

  Then, as shown in FIG. 4A, the claw 200 that is locked to the stepped portion d of the guide portion 110 in a dangling state is pushed radially outward by the stepped portion 133 a of the nozzle body 130, and It contacts the through hole 35. At this time, the claw portion 204 is locked to the inner surface of the drainage horizontal pipe 3 and is in a state indicated by a solid line in FIG. Further, the inner surface of the leg portion 203 has a curvature, and the curvature is the same as the curvature of the outer peripheral surface of the insertion portion 133, so that the leg portion 203 also abuts on the outer peripheral surface of the insertion portion 133. (See FIG. 4). As described above, a locking structure between the claw portion 204 of the claw 200 and the inner surface of the drainage horizontal pipe 3 is referred to as a second locking structure.

  (D) The packing 150 is passed through the guide part 110 to which the nozzle body 130 and the claw 200 are attached (see FIG. 11).

  (E) The packing retainer 170 is placed on the packing 150 (see FIG. 12).

  (F) Pass the nozzle holder 190 through the nozzle body 130 (see FIG. 13), and then tighten the packing holder 170 and the nozzle holder 190 in this order. At this time, the teeth of a wrench (not shown) are locked to the locking surface 131a of the nozzle body 130, and the packing presser 170 and the nozzle presser 190 are sandwiched and rotated with a spanner or the like maintained in this state, and their thread grooves (see FIG. (Not shown) is screwed into a screw groove 113 formed in the large diameter portion 111 of the guide portion 110. By completing the screwing of the packing presser 170, water leakage from the through hole 35 formed in the drainage horizontal drawing pipe 3 is suppressed. Further, when the screwing of the nozzle presser 190 is completed, the nozzle presser 190 pulls up the guide part 110, and as a result, the claw 200 locked to the guide part 110 is also lifted. The engagement with the peripheral edge of the through hole 35 of 204 is strong. For this reason, the drainage of the drain pipe cleaning nozzle 100 from the through hole 35 is suppressed.

  (G) The second water distribution pipe 5 (see FIG. 1) is connected to the connecting portion 131 of the nozzle body 130, and the series of operations is completed (see FIG. 2).

Since the present invention has such a configuration, the nozzle body 130 can be easily attached to the drainage horizontal pipe 3. In addition, the nozzle body 130 is prevented from coming off from the drainage horizontal pipe 3 by the first locking structure and the second locking structure. The first locking structure and the second locking structure are referred to as nozzle removal prevention means.
In addition, it is applicable also when the toilet bowl is a toilet bowl.

1 Washing system 2A, 2B, 2C, 2D Urinal 3 Drainage horizontal pipe (drainage pipe)
4 1st water distribution pipe 5 2nd water distribution pipe 6A-6D Control valve unit 7A-7D Control valve unit 8A-8D User detection part 10A-10D Control apparatus 35 Through-hole (opening part)
100 Drain pipe cleaning nozzle (nozzle)
110 Guide (guide tube)
110a Through hole (passage)
111 large diameter part (bulging part)
111a Through-hole 112 Small diameter part (hanging part)
112a Through-hole 113 Screw groove 115 A pair of groove (notch part)
130 Nozzle body 131 Connection portion 131a Locking surface (mark)
131b Large diameter hole 131f Flange 131s Small diameter hole 133 Insertion part (shaft part)
133a Stepped portion 134 Through hole 135 O-ring 136 Thread groove 137 O-ring mounting groove 150 Packing 170 Packing retainer 172 Flange portion 190 Nut portion 200 Claw (locking body)
202 Mounting part (engagement part)
203 Leg (Body)
204 Claw part (expansion part)
C Center axis d Stepped part

Claims (6)

A nozzle mounting structure for injecting wash water into a drain pipe communicating with a toilet,
A guide tube penetrating through an opening formed in the peripheral surface of the drain pipe and having a passage in the axial direction;
A nozzle body having a shaft portion inserted into the passage of the guide tube;
A locking body inserted between the shaft portion of the nozzle body and the passage of the guide tube,
The guide tube has a bulging portion having a diameter larger than that of the opening portion, and a hanging portion that is connected to the bulging portion and is the same as or smaller in diameter than the opening portion. The passage is formed on the
The locking body is associated with a main body portion that abuts on the shaft portion of the nozzle main body, an expansion portion that protrudes outward from a lower portion of the main body portion, and a nozzle main body and a guide tube that are provided on the upper portion of the main body portion. And an engaging part
When the nozzle body is attached to the drain pipe, the shaft portion of the nozzle body and the main body portion of the locking body are in contact with each other, and the engaging portion of the locking body is engaged with the nozzle main body and the guide tube, A nozzle mounting structure characterized in that the expanded portion abuts against the inner wall of the drainage pipe and the nozzle body is fixed to the opening.   The nozzle mounting structure according to claim 1, wherein a plurality of the engaging bodies are inserted along a periphery of a shaft portion of the nozzle body.   3. A notched portion having a diameter larger than that of the widened portion is provided on a side surface of the hanging portion of the guide tube, and the widened portion protrudes outward from the drooping portion through the notched portion. The nozzle mounting structure described.   The nozzle mounting structure according to claim 1, wherein the guide tube and the nozzle body are engaged by a nut.   The nozzle mounting structure according to any one of claims 1 to 4, wherein the nozzle body is provided with a mark that informs the direction of the injection hole of the nozzle body, thereby determining the correct direction of the injection hole. A method of mounting a nozzle for injecting wash water into a drain pipe communicating with a toilet,
A guide tube penetrating through an opening formed in the peripheral surface of the drain pipe and having a passage in the axial direction;
A nozzle body having a shaft portion inserted into the passage of the guide tube;
A locking body inserted between the shaft portion of the nozzle body and the passage of the guide tube,
The guide tube has a bulging portion having a diameter larger than that of the opening portion, and a hanging portion that is connected to the bulging portion and is the same as or smaller in diameter than the opening portion. The passage is formed on the
The locking body is associated with a main body portion that abuts on the shaft portion of the nozzle main body, an expansion portion that protrudes outward from a lower portion of the main body portion, and a nozzle main body and a guide tube that are provided on the upper portion of the main body portion. An assembling member having an engaging portion,
(A) a step of attaching the guide tube to the opening, the bulging portion protruding outward from the drainage pipe, and the hanging portion facing the drainage pipe;
(B) a step of incorporating the locking body into the guide tube so that the expanded portion faces the drain pipe;
(C) a step of inserting the nozzle body into the guide tube so that the shaft portion and the body portion of the locking body are in contact with each other; and (d) engaging the locking body with the bulging portion of the nozzle body and the guide tube. Combining steps;
Nozzle mounting method including:

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