JP6184852B2 - Fastening structure for tubular member and urinal - Google Patents

Description

  The present invention relates to a fastening structure for a tubular member and a urinal having the structure.

  Conventionally, a urinal contains piping and functional parts for discharging or stopping washing water in an upper internal space. In order to effectively utilize the limited internal space, a pipe joint having a bent portion is often used for fastening the pipe (see, for example, Patent Document 1). For example, a spreader is provided for discharging cleaning water toward the toilet bowl surface of the urinal. The pipe part of the spreader is inserted into a mounting hole provided in the frame of the urinal and connected to the water supply pipe via a pipe joint disposed in the internal space. For the connection of the pipe joint, a fitting structure using the flexibility of the resin material can be adopted as described in Patent Document 1, but considering the resistance against water pressure, screw joining is preferable.

  However, in a structure in which the pipe joint itself is provided with a screw, that is, a structure in which the pipe joint itself is rotated and assembled, there are operational restrictions such as a member attached to the pipe joint hindering rotation. For this reason, adoption of the fastening structure using a nut is considered, for example (refer patent document 2). According to the joint structure described in Patent Document 2, nuts can be inserted from both one end side and the other end side of the pipe, and workability can be improved.

JP 11-343655 A JP 2007-247959 A

  However, in the joint structure described in Patent Document 2, it is necessary to intervene a special seal member for fixing the nut and the pipe, which is disadvantageous in that the number of parts increases. Such a problem may occur not only in a urinal but also in a device or apparatus that requires a tubular member fastening structure.

  The present invention has been made in view of such problems, and one of its purposes is to realize a fastening structure for a tubular member having a high degree of design freedom while suppressing the number of parts.

  In order to solve the above-described problem, a fastening structure according to an aspect of the present invention includes a first tubular member having a thread portion formed on an outer peripheral surface in the vicinity of an opening end, a flange portion, and a distal end than the flange portion. The first tubular member has a second tubular member whose side portion is formed to be insertable into the first tubular member, and a locking portion that can lock the collar portion on the side opposite to the first tubular member. A locking nut that prevents the second tubular member from falling off by being screwed together, and a notch portion that is defined by the locking nut so as to define a locking portion and allow the collar portion to be inserted therethrough.

  The “locking nut” here means a nut for fastening the second tubular member to the first tubular member. According to this aspect, when the first tubular member and the second tubular member are fastened, the collar portion of the second tubular member is inserted into the notch portion of the locking nut. In this state, the locking nut is fastened to the first tubular member, so that the flange portion is held between the locking portion of the locking nut and the first tubular member, and the second tubular member is separated from the first tubular member. Dropping is prevented. According to this aspect, since the locking nut can be inserted into the second tubular member from the front end side with respect to the flange portion, there is a restriction on the shape and size of the second tubular member on the rear end side from the flange portion. Therefore, a high degree of design freedom can be obtained. Moreover, since there is no need to interpose another member for fastening the first tubular member and the second tubular member, the number of parts can be reduced.

  Specifically, the notch is a non-circular through-hole that passes through the head of the locking nut in the axial direction, and has a portion having an opening width larger than the maximum width of the flange and the maximum width of the flange. And a portion having a smaller opening width. According to this aspect, a portion having a large opening width in the through hole can be used when the collar portion is inserted. On the other hand, after the insertion of the collar portion, the locking portion defined by the portion having the small opening width in the through hole functions effectively, and the second tubular member can be prevented from falling off. That is, the fastening of the first tubular member and the second tubular member is realized with a simple configuration using the shape difference between the collar portion and the notch portion.

  The notch portion prevents the insertion of the collar portion in a state where the axis of the tip side portion of the second tubular member is aligned with the axis of the locking nut, and the flange is in a specific state in which those axes are shifted. The shape may be determined so as to allow the insertion of the part. According to this aspect, when the locking nut and the second tubular member are temporarily assembled, the axes of both are temporarily shifted, but in the process of subsequently assembling the locking nut to the first tubular member, the axes are The state is returned to the almost coincidence state, and after the assembly is completed, the coincidence state of the axes is maintained. For this reason, the second tubular member falls off in the process of screwing the locking nut onto the first tubular member, or the second tubular member falls off after completion of the fastening of the first tubular member and the second tubular member. Can be prevented.

  The notch is further shaped to allow the insertion of the collar only in a specific state where the axis of the tip side of the second tubular member is inclined relative to the axis of the locking nut relative to the collar of the second tubular member But you can. According to this aspect, not only is the axis line shifted when inserting the buttocks, but an element that inclines the axis line is added. Therefore, if the reverse operation is not performed sequentially after insertion, the second tubular member can be removed from the first tubular member. Can not. In other words, the second tubular member can be more reliably prevented from falling off.

  The second tubular member may have a defective portion whose thickness in the radial direction is smaller than that of the opposite side surface on one side surface of the tip side portion with respect to the collar portion. And after inserting a tip side part rather than a collar part of the 2nd tubular member into a locking nut via a notch part, a tip side part rather than a collar part is displaced by displacing the 2nd tubular member to the defective part side. These axes and the axis of the locking nut may be able to be shifted. By providing the defect portion in this way, the operation of shifting the axis of the second tubular member and the operation of tilting the axis are facilitated.

  The tubular member fastening structure described above may constitute, for example, a pipe connection structure for connecting a water supply pipe provided in a urinal. The second tubular member may constitute a pipe joint that connects the water supply pipe and the first tubular member. In the urinal, since the installation space for the piping parts is limited to a narrow range, the configuration in which the locking nut is inserted from the distal end side of the second tubular member as described above functions effectively. That is, even if not only a straight pipe type but also a bent pipe type is adopted as the pipe joint, the connection with the first tubular member is facilitated.

  Another aspect of the present invention is a urinal. This urinal is a urinal provided with a water supply pipe accommodated in an upper accommodation space and a fastening structure of a tubular member to which the water supply pipe is connected, and the fastening structure has an outer periphery in the vicinity of the opening end. A first tubular member having a threaded portion formed on a surface thereof, a second tubular member having a flange portion, and a distal end portion of the flange portion that is insertable into the first tubular member; and a flange portion A locking nut that has a locking portion that can be locked on the side opposite to the first tubular member, and that prevents the second tubular member from falling off by being screwed to the first tubular member; A locking portion is defined, and a notch portion is formed so as to be able to pass through the collar portion.

  According to this aspect, since the locking nut is inserted into the second tubular member from the front end side with respect to the flange portion, the shape and size of the second tubular member on the rear end side with respect to the flange portion are restricted. High design freedom is obtained. Especially in urinals, since the installation space for piping parts is limited to a narrow range, the rear end side of the second tubular member may be bent or curved or made smaller than the buttocks of the second tubular member. It can correspond to. Moreover, since there is no need to interpose another member for fastening the first tubular member and the second tubular member, the number of parts can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the fastening structure of a tubular member with a high design freedom can be implement | achieved, suppressing a number of parts.

It is a partial notch top view which shows the upper internal structure of the urinal which concerns on embodiment. It is arrow sectional drawing seen from the side along the predetermined cross section of the urinal upper part. It is a figure showing the structure of an elbow. It is a figure showing the structure of a spreader. It is a figure showing the structure of a latching nut. It is a figure showing the fastening process of an elbow and a spreader. It is a figure showing the fastening process of an elbow and a spreader. It is a figure showing the fastening process of an elbow and a spreader. It is a figure showing the fastening structure concerning a modification.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description, for the sake of convenience, the positional relationship between the structures may be expressed based on the illustrated state.

  FIG. 1 is a partially cutaway plan view showing an upper internal structure of a urinal according to an embodiment. FIG. 2 is a cross-sectional view of the upper part of the urinal as seen from the side along a predetermined cross section. As shown in FIG. 1, in the urinal 1 of the present embodiment, a limited space at the upper part forms an accommodation space 2. The accommodation space 2 accommodates piping for discharging water or stopping water and various functional parts.

  As shown in FIG. 2, a spreader 6 for discharging washing water toward the toilet bowl surface 4 is disposed on the upper part of the toilet bowl surface 4 of the urinal 1. The spreader 6 has an upper half portion that penetrates the frame 7 of the urinal 1 and is connected to a water supply pipe 8 in the accommodation space 2. A human body sensor 9 is provided on the upper front surface of the urinal 1.

  Returning to FIG. 1, the accommodating space 2 has a valve unit 10 for discharging or stopping washing water supplied from an external pipe (not shown), a water supply pipe 8 for supplying the washing water toward the spreader 6, and a valve unit 10. A control unit 12 that opens and closes an electromagnetic on-off valve provided in the control unit 12 is provided. The control unit 12 executes opening / closing control of the electromagnetic opening / closing valve based on a signal from the human body sensor 9.

  The body of the valve unit 10 is provided with an introduction port for introducing cleaning water and a lead-out port for deriving the cleaning water that has passed through the electromagnetic on-off valve. The introduction port is connected to external piping via an L-shaped connection pipe 14. One end of a flexible water supply pipe 8 is connected to the outlet port. The other end of the water supply pipe 8 is connected to the spreader 6 via an elbow 16 as a pipe joint.

  As shown in FIG. 2, the elbow 16 is assembled such that its tip is inserted into the upper end opening of the spreader 6. The elbow 16 and the spreader 6 are connected via a sealing O-ring 18 and are fixed by a locking nut 20. In this embodiment, the spreader 6 corresponds to a “first tubular member” (female tubular member), and the elbow 16 corresponds to a “second tubular member” (male tubular member).

  FIG. 3 is a diagram illustrating the structure of the elbow 16. (A) is the perspective view seen from the top, (b) is a front view, (c) is a left view. (D) is a rear view, (e) is a plan view, and (f) is a bottom view. (G) is AA arrow sectional drawing of (c).

  The elbow 16 is obtained by, for example, injection molding of a resin material, and has an L-shaped main body having a bent portion in the middle in the extending direction. In this embodiment, glass fiber reinforced polypropylene is used as the resin material, but other resin materials can also be used. The elbow 16 is formed so that the upstream pipe portion 22 connected to the water supply pipe 8 and the downstream pipe portion 24 connected to the spreader 6 are orthogonal to each other at the bent portion. The upstream side pipe portion 22 has a nipple-shaped pipe connection portion 26 whose diameter is enlarged and is connected so that one end of the water supply pipe 8 is inserted. A mark 28 (arrow) that is referred to when the elbow 16 and the locking nut 20 are temporarily assembled is attached to the upper surface of the upstream pipe portion 22.

  A flange 30 that protrudes outward in the radial direction is provided at an intermediate portion (near the bent portion) of the downstream pipe portion 24. In this embodiment, the collar part 30 is comprised so that it may become a perfect circle shape by planar view. The distal end portion of the downstream side pipe portion 24 is slightly enlarged in diameter to constitute the connection portion 32. The diameter d2 of the connection part 32 is smaller than the diameter d1 of the collar part 30 (d2 <d1). The connecting portion 32 is provided with a fitting groove 34 for fitting the O-ring 18.

  A plurality of ribs 36 are provided so as to bridge the flange portion 30 and the connection portion 32. In the present embodiment, the first rib 36a protrudes in the extending direction of the upstream pipe portion 22, and the second rib 36b and the third rib 36c are respectively located at positions shifted by 90 degrees on both sides in the circumferential direction of the first rib 36a. Is provided. The front end surfaces of these ribs are flush with the outer peripheral surface of the connection portion 32. That is, the diameter of the circumscribed circle of the three ribs matches the outer diameter of the connection portion 32. These three ribs supplement the strength of the flange 30 and also serve as a guide when the elbow 16 is inserted into the spreader 6.

  As described above, the downstream pipe portion 24 is provided with three ribs at intervals of 90 degrees, but no rib is provided on the opposite side surface of the first rib 36a (FIGS. 3C and 3G). reference). In other words, the side surface opposite to the first rib 36 a in the downstream pipe portion 24 is a “defect portion” in which the radial thickness is reduced. This missing portion facilitates the insertion of the elbow 16 into the locking nut 20 and will be described later.

  FIG. 4 is a diagram illustrating the structure of the spreader 6. (A) is the perspective view seen from the top, (b) is a front view, (c) is a left view. (D) is a top view, (e) is a bottom view, (f) is a BB arrow sectional drawing of (b).

  The spreader 6 has a hollow main body 40 exposed in front of the toilet bowl surface 4 and a cylindrical connecting pipe portion 42 inserted through an attachment hole 38 (see FIG. 2) formed in the frame 7. The downstream pipe portion 24 of the elbow 16 is inserted into the connection pipe portion 42. The connecting pipe part 42 also functions as an inlet 43 for introducing cleaning water through the elbow 16. A male screw portion 45 for screwing the locking nut 20 is provided on the outer peripheral surface of the upper half portion of the connecting pipe portion 42. The main body 40 has an isosceles triangle shape in plan view, and a connecting pipe portion 42 is erected on the upper surface in the vicinity of the apex angle. The bottom surface of the main body 40 is inclined downward as the distance from the connecting pipe portion 42 increases. Hereinafter, the direction away from the connection pipe portion 42 will be described as “front of the spreader 6” for convenience.

  A discharge port 44 is provided on the lower surface of the front end portion of the main body 40. The cleaning water introduced into the introduction port 43 is discharged from the discharge port 44 through the inside of the main body 40. A reinforcing rib 46 is provided at the center in the width direction of the main body 40, and a pair of partition walls 48 are provided at positions symmetrical to the rib 46. Each partition wall 48 is disposed so as to be separated from the rib 46 toward the front. The discharge port 44 is partitioned into four openings by a rib 46 and a pair of partition walls 48. With such a configuration, the cleaning water introduced into the spreader 6 is discharged from the discharge port 44 so as to spread in the width direction.

  A pair of stoppers 50 project from the front end surface of the main body 40. These stoppers 50 keep the angle of the spreader 6 within an appropriate range when the spreader 6 is attached to the toilet bowl surface 4. That is, as shown in FIG. 2, when the spreader 6 is attached to the frame 7, it is necessary to fix the front surface of the main body 40 so as to face the toilet bowl surface 4 with a slight gap. Even if the main body 40 rotates around the axis of the connecting pipe portion 42 during this attachment, the rotation is restricted by any one of the stoppers 50 coming into contact with the toilet bowl surface 4. be able to. In particular, the main body 40 is easily rotated by the torque when the locking nut 20 is fastened. By providing such a restricting means, the spreader 6 can be attached in an appropriate posture (position, angle). As a result, the cleaning water can be discharged from the discharge port 44 toward the toilet bowl surface 4 at an appropriate angle.

  FIG. 5 is a diagram illustrating the structure of the locking nut 20. (A) is the perspective view seen from the top, (b) is a top view, (c) is a bottom view. (D) is CC sectional view taken on the line of (b), (e) is DD sectional view taken on the line of (b). (F) is an explanatory view of a through hole formed in the head of the locking nut 20.

  The locking nut 20 is a hexagonal nut, and has a head 52 at one end and a flange portion 54 at the other end. On the inner surface of the locking nut 20, a female screw portion 56 that can be screwed with the male screw portion 45 of the spreader 6 is provided. The head 52 is provided with a non-circular (non-circular) through hole 58 (see FIG. 5B). A mark 60 (arrow) that is referred to when the flange portion 30 of the elbow 16 is inserted into the through hole 58 is attached to a predetermined location on the upper surface of the flange portion 54.

  As shown in FIG. 5 (f), the through hole 58 is symmetric with respect to a specific center line L1 centered on the point O that is the axis of the locking nut 20 in plan view, and is orthogonal to the center line L1. It is formed so as to be asymmetric with respect to the reference line L2. The through-hole 58 has an arc portion 62 having a radius r centered on the point O and the point P1 shifted from the point O to the one side (right side in the figure) by p along the L1 on the other side (in the figure) It is formed on one side (right side in the figure) around the arc part 64 of radius r formed on the left side and the point P2 shifted from the point O to the other side (left side in the figure) by p along the L1. And an arc portion 66 having a radius r. Here, the arc portion 62 is formed in a range of l1 on one side (right side in the drawing) of the reference line L2 and l2 on the other side (left side in the drawing) (l1 <l2). For this reason, the arc portion 64 is shorter than the arc portion 66.

  Here, the diameter d1 (see FIG. 3 (e)) of the flange portion 30 of the elbow 16 is slightly smaller than 2r which is the maximum opening width of the through hole 58 and larger than 2r-p which is the intermediate opening width. On the other hand, the diameter d2 of the connecting portion 32 of the elbow 16 is sufficiently smaller than 2 (rp) which is the minimum opening width of the through hole 58. For this reason, the front end side of the elbow 16 can be easily inserted into the through hole 58. On the other hand, the collar portion 30 cannot be inserted unless it matches at least the portion of the maximum opening width of the through hole 58. Moreover, since the collar part 30 is circular, the through-hole 58 cannot be inserted in a state where the axes of the elbow 16 and the locking nut 20 are aligned or parallel. In the present embodiment, by using the above-described missing portion of the elbow 16, the axis of the elbow 16 and the locking nut 20 is shifted along the center line L 1, and the axis of the elbow 16 is further inclined to penetrate the flange portion 30. The holes 58 can be inserted. Details thereof will be described later.

  6-8 is a figure showing the fastening process of the elbow 16 and the spreader 6. FIG. FIGS. 6 and 7 show a pre-stage process until the elbow 16 is inserted into the locking nut 20, and FIG. 8 shows a post-stage process of fixing the elbow 16 and the spreader 6 with the locking nut 20. 6 is a cross-sectional view, and FIG. 7 is a plan view. Hereinafter, the direction in which the upstream pipe portion 22 extends in the elbow 16 will be described as “front of the elbow 16” for convenience.

  When the elbow 16 and the spreader 6 are fastened, the elbow 16 and the locking nut 20 are temporarily assembled prior to fixing the elbow 16 and the spreader 6. At that time, it is necessary to assemble the locking nut 20 not from above the elbow 16 (upstream side pipe part 22 side) but from below (downstream side pipe part 24 side). That is, the upstream pipe portion 22 has a portion with a large pipe diameter (pipe connection portion 26), the bending angle of the bent portion of the elbow 16 is small, and the flange portion 30 is in the vicinity of the bent portion. This is because the locking nut 20 cannot be inserted from above the elbow 16.

  When the elbow 16 and the locking nut 20 are assembled, as shown in FIGS. 6 (a) and 7 (a), after the O-ring 18 is fitted to the connecting portion 32 of the elbow 16, the downstream pipe The part 24 is inserted from the head 52 side of the locking nut 20. At this time, as shown in FIG. 6A, the axis L3 of the downstream pipe portion 24 and the axis L4 of the locking nut 20 can be easily inserted.

  Thus, as shown in FIG.6 (b), it inserts to such an extent that the collar part 30 hits the head 52. FIG. 7B, after adjusting the direction of the elbow 16 so that the directions of the mark 28 and the mark 60 coincide with each other, the elbow 16 is drawn rearward, and the rear side surface of the downstream pipe portion 24 is drawn. (The side opposite to the first rib 36a) is displaced so as to abut against the inner periphery of the through hole 58. As described above, since the rear side surface of the downstream pipe portion 24 is a missing portion where no rib is provided, the axis L3 of the elbow 16 is connected to the locking nut 20 as shown in FIG. Relative to the axis L4.

  Subsequently, as shown in FIG. 6C, the elbow 16 is tilted so that the tip of the upstream side pipe portion 22 is directed downward from this state. At this time, as shown in FIG. 7C, the front end edge of the flange portion 30 can be substantially aligned with the arc portion 66 of the through hole 58. The elbow 16 is displaced downward while maintaining this inclined state, so that the front end edge of the flange portion 30 becomes the inner periphery of the arc portion 66 of the through hole 58 as shown in FIGS. 6 (d) and 7 (d). It can be inserted along the surface.

  After the front end edge of the collar portion 30 is inserted through the through hole 58 in this way, the elbow 16 is displaced slightly forward as shown in FIG. Thereby, as shown in FIG. 7 (e), the rear end edge of the flange portion 30 can be substantially aligned with the arc portion 64 of the through hole 58. By displacing the elbow 16 downward from this state, the rear end edge of the collar portion 30 extends along the inner peripheral surface of the arc portion 64 of the through hole 58 as shown in FIGS. 6 (f) and 7 (f). Can be inserted. That is, the collar part 30 can be inserted into the locking nut 20 as described above.

  When the elbow 16 is inserted in this manner and then the inclination is reestablished, the head 52 of the locking nut 20 overlaps the flange 30 as shown in FIGS. 6 (f) and 7 (f). . For this reason, even if the collar portion 30 is displaced above the head portion 52, the head portion 52 functions as a “locking portion” that locks the head portion 52, and can be prevented from falling off.

  After the assembly of the elbow 16 and the locking nut 20 is completed as described above, the water supply pipe 8 is connected to the upstream pipe portion 22 of the elbow 16 as shown in FIG. Assemble to the spreader 6. At this time, the connecting pipe portion 42 of the spreader 6 is held in a state of being inserted into the mounting hole 38 of the frame 7, and the connecting portion 32 of the elbow 16 is inserted into the connecting pipe portion 42 to an appropriate depth. Further, the direction (angle) of the elbow 16 with respect to the main body 40 is adjusted during the insertion process.

  In this insertion process, as shown in FIG. 8B, the downstream pipe portion 24 of the elbow 16 is pushed into the connection pipe portion 42 while the locking nut 20 is screwed to the connection pipe portion 42. And as shown in FIG.8 (c), the flange part 54 of the latching nut 20 contact | abuts to the upper surface of the flame | frame 7, and the fastening operation | work is complete | finished in the state from which the moderate fastening force by the latching nut 20 was obtained. . Thereby, the spreader 6 can be firmly fixed in a mode in which the frame 7 is sandwiched between the main body 40 and the flange portion 54.

  In this embodiment, in order to realize the stable fixing of the spreader 6, as shown in FIG. 8C, the distance D between the head 52 of the locking nut 20 and the upper end of the spreader 6 after fastening is small. The size is larger than the thickness t of the portion 30 and a predetermined play L is formed. If the distance D is smaller than the thickness t of the flange 30, the amount of screwing of the locking nut 20 is restricted after the flange 30 is sandwiched between the locking nut 20 and the spreader 6. For this reason, the force which clamps the flame | frame 7 with the flange part 54 and the main body 40 is not fully obtained, and the spreader 6 may rattle.

  In the illustrated example, the state in which the collar part 30 abuts against the head part 52 of the locking nut 20 after fastening is shown. However, because of the above-described play L, the collar part 30 is removed from the head part 52. It can also be separated. Further, since the elbow 16 can be rotated around the axis of the downstream pipe portion 24, it is convenient to change or adjust the direction of the elbow 16 after fastening. The elbow 16 can hold the position after being fastened to some extent by the frictional force caused by the O-ring 18 being in close contact with the inner peripheral surface of the connecting pipe portion 42. Even if the elbow 16 is displaced by the water pressure generated when the cleaning water is discharged, the elbow 16 does not fall off because the flange 30 is locked by the head 52 of the locking nut 20.

  In the illustrated example, the elbow 16 is fastened to the spreader 6 after the water supply pipe 8 is connected to the elbow 16. However, the water supply pipe 8 may be connected after the elbow 16 is fastened to the spreader 6. .

  As described above, in this embodiment, the spreader 6 and the elbow 16 are fastened by screw joining using the locking nut 20. For this reason, even if the elbow 16 receives a large water pressure when the spreader 6 discharges water, the elbow 16 can be prevented from falling off due to sufficient bonding strength between the spreader 6 and the locking nut 20. In particular, since the elbow 16 and the locking nut 20 are assembled in a unique form utilizing the shape difference between the flange 30 and the through hole 58 prior to the fastening, they can be easily removed once they are assembled. I can't. This ensures that the elbow 16 can be prevented from falling off the spreader 6. Further, since the flange portion 30 is integrally formed with the elbow 16, there is no need to intervene a separate member for assembling the spreader 6 and the locking nut 20, so the number of parts can be reduced and the cost can be reduced. Can be realized.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the specific embodiments, and various modifications can be made within the scope of the technical idea of the present invention. Nor.

  FIG. 9 is a diagram illustrating a fastening structure according to a modification. (A) shows a 1st modification, (b) shows a 2nd modification. The upper part of each figure shows a plan view of the locking nut, and the lower part shows the positional relationship of the flange when the elbow is fastened to the locking nut.

  As shown in FIG. 9A, in the first modification, the through hole 258 provided in the head 52 of the locking nut 220 forms a circular shape (perfect circle), while the shaft center of the locking nut 220 is formed. It is provided so as to be eccentric to one side with respect to a certain point O. The elbow flange 230 has a perfect circle shape whose diameter is slightly smaller than that of the through hole 258, and is inserted into the through hole 258 while shifting the axis, and then the axis is aligned with the axis of the locking nut 220. Assembled. Such a configuration can also effectively prevent the elbow from falling off.

  Further, as shown in FIG. 9B, in the second modification, the through hole 358 provided in the head 52 of the locking nut 320 has an elliptical shape, the center of which is the axis of the locking nut 320. Is coincident with point O. The elbow flange 330 has a perfect circular shape with a diameter smaller than the long diameter of the through hole 358 and larger than the short diameter, and is inserted into the through hole 358 by shifting the axis, and then the axis is connected to the locking nut 320. It is assembled to match the axis. Such a configuration can also effectively prevent the elbow from falling off.

  In the above-described embodiment and the modified example, in the state where the axis of the elbow (second tubular member) is aligned with the axis of the tip side of the flange and the axis of the locking nut, how to change the angle around the axis. Both have a shape that can prevent the collar portion from passing through the through hole. In a further modification, the shape of the through hole may be determined so as to allow the insertion of the collar portion when the relative angle around the axis is a specific angle even in the state where the axes are aligned.

  Although the example which employ | adopts an elbow as a 2nd tubular member was shown in the said embodiment, it is good also as other bent piping or a straight pipe. However, the effect of the above-described embodiment is remarkably exhibited in a configuration in which the locking nut can be inserted only from one end side of the second tubular member. For this reason, even if it is bent piping, it becomes especially effective for what a latching nut cannot easily pass through the bent part or curved part. Even a straight pipe is particularly effective for a pipe having a small diameter on one end and a large diameter on the other end.

  In the above embodiment, the through hole (notch) has a shape in which the flange cannot be inserted unless the elbow axis is shifted in a direction away from the axis of the locking nut and tilted. In the modified example, the shape of each of the collar part and the through hole may be determined so that the collar part can be inserted by performing at least one of shifting and tilting the axis without performing the other. That is, the collar portion cannot pass even if the second tubular member is inserted straight along the axis of the locking nut, the second tubular member is shifted from the axis of the locking nut and moved to one side, and It is only necessary that the collar portion can be passed by both or one of inclining the axis of the two tubular members with respect to the axis of the locking nut. In the above embodiment, the through hole is non-circular, but it may be oval, polygonal or other shapes.

  In the above-described embodiment, ribs are provided on three sides of the downstream pipe portion of the elbow, and a thick defect portion is provided by not providing the rib in the remaining one direction, so that the elbow can be brought to one side with respect to the locking nut. I did it. In the modification, the downstream end portion may be formed in a columnar shape having a radius corresponding to the rib, and the missing portion may be provided in such a manner that one side surface is notched. Further, in the above-described embodiment, the configuration in which the defect portion is provided on the side surface opposite to the extending direction of the upstream pipe portion in the elbow is illustrated, but the position of the defect portion is determined regardless of the extending direction of the upstream pipe portion. You can also.

  In the said embodiment, the through-hole was made into the shape which became symmetrical with respect to the specific centerline in the planar view of a latching nut, and became asymmetrical with respect to the reference line orthogonal to the centerline. In the modification, the shape of the through hole may be determined so as to be symmetric with respect to the reference line. However, as in the above-described embodiment, it is advantageous that the contact area between the locking portion of the locking nut and the flange portion is made larger by making it asymmetric in that the pressure resistance of the locking portion can be increased.

  In the above embodiment, the shape of the collar portion is a perfect circle shape, but may be an elliptical shape, a polygonal shape, or other shapes. What is necessary is just a shape which can insert a collar part into a through-hole by performing at least one of shifting and inclining the axis of a 2nd tubular member.

  In the said embodiment, although the example which applies the fastening structure of the said tubular member to a urinal was shown, it cannot be overemphasized that it is applicable also to other apparatuses or apparatuses, such as a toilet bowl and the piping connection part of a housing facility. . If it is the object apparatus and object apparatus which have a water inlet (fluid inlet) and a drain outlet (fluid outlet), the said fastening structure can be employ | adopted regardless of the kind.

  In addition, this invention is not limited to the said embodiment and modification, A component can be deform | transformed and embodied in the range which does not deviate from a summary. Various inventions may be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments and modifications. Moreover, you may delete some components from all the components shown by the said embodiment and modification.

  DESCRIPTION OF SYMBOLS 1 Urinal, 2 Containment space, 4 Toilet surface, 6 Spreader, 7 Frame, 8 Water supply piping, 16 Elbow, 20 Locking nut, 22 Upstream side pipe part, 24 Downstream side pipe part, 30 Ling part, 32 Connection part , 36 rib, 38 mounting hole, 40 body, 42 connecting pipe part, 45 male thread part, 52 head part, 54 flange part, 56 female thread part, 58 through hole.

Claims (4)

A first tubular member having a threaded portion formed on the outer peripheral surface near the open end;
A second tubular member having a collar part, a portion on the tip side of the collar part formed so as to be insertable into the first tubular member;
A locking nut that has a locking portion that can lock the flange on the side opposite to the first tubular member, and prevents the second tubular member from falling off by being screwed to the first tubular member. When,
The locking nut is defined by the locking nut, and a notch formed so as to be able to be inserted through the flange ,
The notch includes a non-circular through-hole penetrating the head of the locking nut in the axial direction, a portion having an opening width larger than the maximum width of the flange, and a maximum width of the flange Including a portion having a small opening width,
The cutout portion prevents the insertion of the flange portion in a state where the axis of the distal end side portion of the second tubular member is aligned with the axis of the locking nut, and shifts the axes thereof. The shape is determined to allow the insertion of the buttocks in a specific state,
The second tubular member has a deficient portion whose thickness in the radial direction is smaller than that of the opposite side surface on one side surface of the tip side portion of the collar portion,
By inserting the distal end portion of the second tubular member from the hook portion into the locking nut through the cutout portion, the second tubular member is displaced toward the defect portion to thereby move the hook portion. A structure for fastening a tubular member, characterized in that the axial line of the distal end side portion and the axis line of the locking nut can be shifted from each other . The notch is shaped so as to allow the insertion of the flange only in a specific state where the axis of the tip side portion of the second tubular member is inclined with respect to the axis of the locking nut. 2. The tubular member fastening structure according to claim 1 , wherein the fastening structure is defined. Configure the pipe connection structure to connect the water supply pipe provided in the urinal,
The said 2nd tubular member comprises the pipe joint which connects the said water supply piping and the said 1st tubular member, The fastening structure of the tubular member of Claim 1 or 2 characterized by the above-mentioned. A urinal comprising a water supply pipe accommodated in the upper accommodation space, and a fastening structure of a tubular member to which the water supply pipe is connected,
The fastening structure is the fastening structure according to any one of claims 1 to 3,
The urinal of the second tubular member is characterized in that a portion of the rear end side of the collar portion is formed to be connectable to the water supply pipe.

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