JP2005105781A - Flush toilet and spreader mounting method for flush toilet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flush toilet capable of preventing a spreader from being damaged by preventing torque from being transmitted to the spreader in tightening a nut for fixing the spreader to the flush toilet. <P>SOLUTION: In this flush toilet, the spreader discharging washing water is installed in the bowl part of the flush toilet. The spreader 4 comprises a tubular water supply part fitted to a water supply connection tube and a washing water discharge part connected continuously with the tubular water supply part. The water supply connection tube is fixed to the flush toilet by screwing a nut member to a screw part formed on the outer peripheral surface thereof. The water supply connection tube is fitted to the tubular water supply part through a tolerance ring, and the tubular water supply part is supported by the tolerance ring. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a flush toilet equipped with a spreader for ejecting wash water for washing the bowl surface of a toilet such as a urinal.

Conventionally, a spreader is attached to the inner surface of a urinal, water from a water supply pipe is sprayed from the spreader, and the inner surface of the urinal is washed (see, for example, Patent Document 1).
In the urinal according to Patent Document 1, the rear surface of the spreader body is provided with a fitting protrusion having a non-circular cross-sectional shape, while a fitting hole having a cross-sectional shape corresponding to the urinal is provided. By restricting the position at the time of attaching to the toilet bowl, the washing water from the spray hole of the spreader can be reliably sprayed over the set direction or the set range.

JP 2000-303543 A (page 1-3, FIG. 3)

  The spreader is exposed on the inner surface of the toilet. For this reason, it is generally formed of a resin from the viewpoint of corrosion resistance. When the spreader is attached and fixed to the urinal, a screw portion provided on the outer periphery of the water supply portion for supplying water to the spreader is tightened with a nut from the outside of the toilet, so that the spreader and the nut can Fixing to the urinal by holding the clip is performed.

However, in the fixing using such a nut, there is a possibility that the resin spreader may be damaged due to excessive tightening of the nut.
Therefore, this nut is placed in a place concealed from the outside, and tightening of the nut is performed in a state where the tightening torque is controlled at the factory to prevent breakage of the spreader. In some cases, it may be necessary to install the nut at a position where it can be operated from the outside of the urinal. In such a case, even if the nut is assembled with the tightening torque controlled at the factory, piping to the water supply source at the construction site If the nut is accidentally operated during connection or the like, the spreader will be damaged.

  An object of the present invention is to provide a flush toilet capable of preventing torque transmission to the spreader and preventing the spreader from being damaged when a nut for fixing the spreader to the flush toilet is tightened.

  In order to achieve the above object, the present invention according to claim 1 is a flush toilet in which a spreader for discharging flush water is attached to the inner surface of a bowl portion of a toilet bowl, wherein the spreader is fitted with a water supply connecting pipe. And a flush water discharge portion provided continuously with the tubular water supply portion, and a nut member is screwed to a screwing portion provided on the outer peripheral surface of the water supply connection pipe to be fixed to the toilet. The connecting pipe and the tubular water supply portion are fitted through a tolerance ring, and the tubular water supply portion is supported by the tolerance ring.

  In the present invention configured as described above, fixing to the toilet by tightening the nut member is performed by a water supply connection pipe, and by fitting and connecting the water supply connection pipe and the spreader via a tolerance ring, When the nut member is tightened, the transmission of the rotational torque from the water supply connecting pipe to the spreader can be stopped more than a predetermined value, and the spreader can be prevented from being damaged.

In the present invention, preferably, the spreader is made of a resin, and an insert-molded metal cylinder portion is provided at least at a portion of the tubular water supply portion facing the tolerance ring.
In the present invention configured as described above, the spreader can be configured at low cost, and even if the tolerance ring is made of metal, the fitting portion between the water supply connection pipe and the spreader is in contact with each other, and the spreader may be damaged. Is low and has excellent durability.

In the present invention, preferably, a ring-shaped seal member is disposed with the tolerance ring interposed therebetween in order to seal a fitting portion between the water supply connecting pipe and the tubular water supply portion.
In the present invention configured as described above, it is possible to prevent leakage of cleaning water from a portion where the spreader and the water supply connecting pipe are fitted, and to suppress corrosion of the tolerance ring by an external detergent or the like. it can.

In the present invention, preferably, an elastic member is disposed on a surface of the cleaning water discharger that contacts the inner surface of the bowl surface.
In the present invention configured as described above, the spreader can be prevented from being damaged by the cushioning action at the toilet abutment portion of the spreader, and dirt adhesion between the spreader and the toilet can be prevented.

  Further, in the method of attaching the spreader to the flush toilet of the present invention, the water supply connecting pipe provided with a threaded portion into which the nut member is screwed on the outer peripheral part, and the water washing provided with a through hole for attaching the water supply connecting pipe A step of preparing a toilet, a tubular water supply portion into which the water supply connection pipe is inserted, and a spreader having a flush water discharge portion connected to the tubular water supply portion, and a tolerance ring is fitted to the outside of the water supply connection pipe A step of inserting the tubular water supply portion into the tolerance ring, and protruding the water supply connecting pipe from the bowl surface side of the flush toilet to the outside of the flush toilet through the through hole, It is characterized by comprising the step of contacting the bowl surface and the step of screwing the nut member into the screwing portion and moving the water supply connecting pipe to the outside of the flush toilet.

According to the method for attaching the spreader to the flush toilet configured as described above, the nut member is fastened to the flush toilet by tightening the nut member, and a tolerance is provided at the connecting portion between the feed water connecting pipe and the spreader. By using the ring, it is possible to stop the transmission of rotational torque from the water supply connecting pipe to the spreader when the nut member is tightened, and to prevent the spreader from being damaged.
Moreover, by moving the water supply connecting pipe to the outside of the flush toilet while the spreader is in contact with the bowl inner surface of the flush toilet, it is possible to prevent the spreader from being pressed against the inner surface of the flush toilet and fixing, thereby creating a gap. .

  ADVANTAGE OF THE INVENTION According to this invention, when the nut for fixing a spreader to a flush toilet is tightened, the torque transmission to a spreader can be prevented and damage to a spreader can be prevented.

A flush toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is an overall view of a urinal according to an embodiment of the present invention, FIG. 2 is an XX sectional view in FIG. 1, and FIG. 3 is a YY sectional view in FIG. 4 is an enlarged view of part A in FIG. 2, and FIG. 5 is a partially enlarged view of FIG. FIG. 6A is a plan view of the tolerance ring, and FIG. 6B is a side view.

  As shown in FIG. 1, the urinal 10 fixed to the wall surface W of the toilet room is cleaned by supplying cleaning water from a flush valve 20 as a cleaning water supply valve. Specifically, the flush valve 20 is connected to a water supply pipe installed outside the wall surface W of the toilet room by a water supply unit 21 at the rear part (right side in FIG. 1). Then, when the push button 22 is pressed, a valve body (not shown) built in the flash valve 20 is opened for a predetermined time, whereby cleaning water is supplied to the urinal 10 through the connecting pipe 24.

  As shown in FIG. 2, a water supply connection pipe 30 is fixed to the urinal 10, and the water supply connection pipe 30 includes an upper wall opening 12 and a lower wall of the bag portion 11 provided above the urinal 10. The flange 13 is fixed by a hooked nut 35 in a state where the opening 13 is inserted and the flange portion 31 is in contact with the lower surface of the upper wall opening 12. A flat packing 36 and a slip washer 37 are sandwiched between the hooked nut 35 and the urinal 10 to prevent the ceramic urinal 10 from being damaged.

  A spreader 40 is fixed to the inner surface of the urinal of the water supply connection pipe 30. The spreader 40 has a pressure water chamber 41 for receiving the washing water flowing in from the water supply connecting pipe 30, a washing water spouting portion having a water outlet 42 for ejecting the washing water of the pressure chamber 41 along the inner surface of the urinal, The connecting tube 30 and the fitting portion 43 to be fitted are configured, and a metal cylinder 44 is insert-molded inside the fitting portion 43.

  A tolerance ring 50 is interposed between the water supply connection pipe 30 and the metal cylinder 44 of the spreader 40 via a solid lubricant. Specifically, as shown in FIG. 3, the thrust force in the axial direction of the water supply connection pipe 30 is large due to the elastic force of the tolerance ring 50, and as a result, the spreader 40 is prevented from coming off from the water supply connection pipe 30. ing. On the other hand, the tolerance ring 50 has a small transmission torque in the circumferential direction of the joint 30, and as a result, the transmission of the excessive torque accompanying the rotation of the water supply connection pipe 30 to the spreader 40 is cancelled. An O-ring 45 is fitted on the upper and lower sides of the tolerance ring 50 and sealed in a watertight manner.

  As shown in FIG. 6, the tolerance ring 50 has a cylindrical shape with a notch in a part thereof. The entire tolerance ring 50 is made of an elastic material such as a spring steel plate, and is made up of protrusions 52 formed at appropriate intervals from the ring 51. Therefore, as shown in FIG. 5, when the water supply connection pipe 30 and the metal cylinder 44 are interposed, the protrusion 52 stretches between the two, so that the gap between the water supply connection pipe 30 and the metal cylinder 44 is increased. To generate spring force. However, when torque is applied in the circumferential direction, since the frictional force between the protrusion 52 and the metal tube 44 is larger than the frictional force between the inner surface of the annular ring 51 and the water supply connecting pipe 30, the transmission of the torque can be canceled.

Next, the tolerance ring 50 will be described with reference to the principle diagram of FIG. As shown in FIG. 6, the tolerance ring 50 has the shape of a ring having a corrugated projection, and each wave acts as a spring, and its acting force is proportional to the amount of deformation of the wave. The force required for assembly is AF (N), the radial force is RL (N), the friction coefficient is μ, the number of waves is n, the amount of wave deformation is c (mm), and the spring constant is K (N / mm). When the transmission torque is Mt and the shaft diameter is d (m),
RL = n · c · K
AF = RL · μ
Mt = AF · d / 2
Can be calculated.
The spring constant can be set by changing the thickness, wave pitch, width, shape, and height of the material. Therefore, the required tightening torque of the brazing nut 35 required to fix the water supply connection pipe 30 to the urinal 10 In addition, a limit torque or the like at which the spreader 40 does not rotate is determined through experiments or the like, and the shape of the tolerance ring 50 is selected according to the torque.
When a torque greater than the set torque is generated in the water supply connection pipe 30, the protrusion 52 of the tolerance ring 50 bites into the metal cylinder 44 and is fixed, and the inner surface of the ring 51 of the tolerance ring is the water supply connection pipe 30. It is possible to prevent the resin from being damaged or the spreader from rotating without causing the spreader 40 to be loaded with a load greater than the set torque.

  The urinal 10 has a configuration in which one end of the water supply connection pipe 30 is inserted and fitted inside the fitting part 43 of the spreader 40. Conversely, the fitting part 43 is inserted inside the water supply connection pipe 30. It can also be configured to fit.

Next, a procedure for fixing the spreader 40 to the urinal will be described with reference to FIG.
First, the tolerance ring 50 is fitted to the water supply connection pipe 30, one end of the water supply connection pipe 30 is inserted into the fitting portion 43 of the spreader 40, and the end of the fitting portion 43 (upper end side in FIG. 2) and the water supply connection pipe 30 flange portions 31 are brought into contact with each other. In this state, the other end of the water supply connecting pipe 30 where the spreader 40 is not fixed protrudes upward from the upper wall opening 12.

  Then, the flat packing 36 and the slip washer 37 are fitted into the protruding water supply connection pipe 30, and tightened with the hooked nuts 35 into the threaded portions 30 a formed on the outer periphery of the water supply connection pipe 30. The water supply connecting pipe 30 is raised by the axial force accompanying the tightening of the hooked nut 35. At that time, the upper surface of the spreader 40 is in contact with the inner surface of the urinal 10. When the flanged nut 35 is further tightened, the flange portion 31 comes into contact with the lower peripheral edge of the upper wall opening 12 and the water supply connection pipe 30 stops rising, and the urinal is composed of the flange portion 31 and the flanged nut 35. By sandwiching 10, the water supply connection pipe 30 is fixed to the urinal 10.

  In this fixing, the spreader 40 comes into contact with the inner surface of the urinal 10 more strongly as the water supply connecting pipe 30 is raised while in contact with the inner surface of the urinal 10. When the water supply connection pipe 30 is lifted, the presence of the tolerance ring 50 does not transmit excessive torque in the rotational direction and damage the spreader 40. In addition, since the elastic body 46 exists in the contact part of the spreader 40 and the inner surface of the urinal 10, the spreader 40 is prevented from being damaged and a gap is prevented from being generated.

  As described above, the installation of the urinal with the spreader 40 fixed through the water supply connecting pipe 30 to the toilet room will be described. As shown in FIG. 1, the flush valve 20 and the water supply connecting pipe 30 protruding from the upper end of the urinal 10 are connected by a connecting pipe 24. At that time, the connecting pipe 24 and the flush valve 20, and the connecting pipe 24 and the water supply connecting pipe 30 are all connected using the cap nuts 25 and 26. The hooked nut 35 that fixes the connection pipe 30 to the urinal 10 is loosened, and the tightening rotation of the cap nuts 25 and 26 also causes the water supply connection pipe 30 to rotate, but the water supply connection pipe 30 and the spreader 40 Since a tolerance ring is interposed in the fitting portion, excessive torque accompanying the rotation of the water supply connection pipe 30 is transmitted to the spreader 40, and the spreader 40 is not damaged. In addition, transmission of excessive torque to the spreader 40 is prevented even when the loose nut 35 is tightened.

  In the embodiment of the invention described above, the fixing of the spreader to the urinal has been described, but it can also be used to fix the spreader provided for cleaning the bowl surface of the urinal.

The whole urinal figure of the embodiment of the present invention. XX sectional drawing in FIG. YY sectional drawing in FIG. The A section enlarged view of FIG. The elements on larger scale of FIG. The top view (a) and side view (b) of the tolerance ring 50. FIG. Explanatory drawing of the principle of the tolerance ring 50. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Urinal 11 ... Bag part 12 ... Upper wall opening 13 ... Lower wall opening 20 ... Flash valve 21 ... Water supply part 22 ... Push button 24 ... Connection pipe 25, 26 ... Cap nut 30 ... Water supply connection pipe 30a ... Screwing part DESCRIPTION OF SYMBOLS 31 ... Flange part 35 ... Nut with flange 36 ... Flat packing 37 ... Slip washer 40 ... Spreader 41 ... Pressure chamber 42 ... Water discharge port 43 ... Insertion part 44 ... Metal cylinder 45 ... O-ring 46 ... Elastic body 50 ... Tolerance ring 51 ... Ring 52 ... Protrusions

Claims (5)

A flush toilet in which a spreader for discharging flush water is attached to the inner surface of the bowl portion of the toilet bowl,
The spreader has a tubular water supply portion that fits into the water supply connection pipe, and a flush water discharge portion that is connected to the tubular water supply portion, and a nut member is screwed into a threaded portion provided on the outer peripheral surface of the water supply connection pipe. In addition, the flush toilet bowl is fixed to the toilet bowl, and the water supply connecting pipe and the tubular water supply section are fitted via a tolerance ring, and the tubular water supply section is supported by the tolerance ring. The flush toilet according to claim 1, wherein the spreader is made of resin, and at least a portion of the tubular water supply portion facing the tolerance ring is provided with an insert-molded metal cylinder portion. The ring-shaped sealing member is arrange | positioned on both sides of the said tolerance ring in order to seal the part which the said water supply connection pipe and the said tubular water supply part fit. Flush toilet. The flush toilet according to any one of claims 1 to 3, wherein an elastic member is disposed on a surface of the washing water spouting portion that comes into contact with the inner surface of the bowl surface. A water supply connecting pipe provided with a screwing portion into which a nut member is screwed on an outer peripheral part, a flush toilet provided with a through hole for attaching the water supply connecting pipe, a tubular water supply part into which the water supply connecting pipe is inserted, and A step of preparing a spreader having a flush water discharge portion provided continuously with a tubular water supply portion;
Fitting a tolerance ring on the outside of the water supply connecting pipe;
Inserting the tubular water supply portion into the tolerance ring;
Projecting the water supply connecting pipe from the bowl surface side of the flush toilet through the through-hole to the outside of the flush toilet and bringing the flush water discharger into contact with the bowl surface;
A step of screwing the nut member into the screwing portion and moving the water supply connecting pipe to the outside of the flush toilet;
The spreader mounting method of the flush toilet characterized by comprising.

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