JP5601846B2 - Piping and drainage structure - Google Patents

Description

  The present invention relates to a piping and a drainage structure.

  At present, rigid pipes such as PVC pipes are mainly used for pipes such as appliance drain pipes and drainage horizontal branch pipes, and pipes are provided with a predetermined gradient by a level-adjustable support fitting (level band). The diameter of such a pipe is determined by the type of drainage device and the way of merging. In general, the drainage flows only in the lower half of the axial cross section of the pipe, and the upper half plays a role of ventilation. For this reason, since the upper half of the axial cross section of the pipe is necessary even though drainage does not flow, the pipe becomes thick. When such a thick pipe is applied to, for example, a drain structure of a unit bath, there is a disadvantage that an underfloor space between the floor surface of the unit bath and the floor slab is expanded.

  Therefore, if a pipe that is thinner than the specified pipe is laid so that water flows through the entire cross-section, it will be blown out or broken in the drain trap of other joining drainage equipment during drainage, or the pressure generated in the vertical pipe Phenomenon occurs.

  In addition, when a pipe made of a soft member that expands and contracts is piped, as shown in FIG. 11, the pipe is slackened and cannot be piped with a predetermined gradient, and there is a possibility that backflow or poor drainage may occur.

  On the other hand, in Patent Document 1, when the drainage facility becomes a positive pressure, the air in the drainage facility flows into the flexible air reservoir and the positive pressure is increased by inflating the flexible air reservoir. A damped pressure damping device is disclosed.

Japanese Patent No. 4295616

  However, in Patent Document 1, the pressure attenuator must be provided in the pipe, which increases the cost. Moreover, this pressure attenuating device is large, and the size is increased as a whole.

  In view of the above facts, an object of the present invention is to provide a piping and a drainage structure capable of absorbing fluctuations in air pressure.

The pipe according to the first aspect of the present invention includes a water flow portion through which water flows and a water flow space that covers the water flow portion, and the water flow space when the water flow space has a positive pressure. inner expands from when the atmospheric pressure by the water flow space when said water passage space becomes negative pressure is reduced than when the atmospheric pressure, the expansion and contraction member to change the volume of the water flow space And comprising .

According to the configuration of this temporarily passed through the space even when the positive pressure, it is possible to expand the volume of the water flow space inflated inflation and deflation member returns to a state close to atmospheric pressure. Moreover, even if the inside of the water flow space temporarily becomes a negative pressure, the expansion / contraction member is reduced, the volume of the water flow space is reduced, and the state close to the atmospheric pressure can be restored. That is, since the air density in the water flow space can be adjusted, fluctuations in air pressure that is proportional to the air density can be absorbed.
Note that the positive pressure, have had to be at a higher pressure than the atmospheric pressure, the negative pressure refers to than atmospheric pressure is low.

In the pipe according to the second aspect of the present invention, the expansion / contraction member starts to expand when the air pressure in the water flow space rises by 20 Pa from the atmospheric pressure, and when the air pressure in the water passing space rises by 400 Pa from the atmospheric pressure, The volume of the water space expands to be 1.5 times or more than the volume when the water flow space is at atmospheric pressure.
In this way, the expansion / contraction member starts to expand when the air pressure in the water passage space rises by 20 Pa from the atmospheric pressure, and when the air pressure in the water passage space rises by 400 Pa from the atmospheric pressure, the volume of the water passage space becomes larger in the water passage space. The positive pressure can be sufficiently relieved if it is configured to expand so as to be 1.5 times or more from the volume when the pressure is atmospheric pressure.

In the pipe according to the third aspect of the present invention, the expansion / contraction member is a soft member that is softer than the hard member that forms the water flow portion.
In this way, by making the expansion / contraction member softer than the hard member forming the water flow portion, the soft member of the pipe is shrunk when storing or delivering a plurality of pipes. Moreover, it can suppress that piping is bulky by stacking down the hard member of other piping.

As for the piping which concerns on the 4th aspect of this invention, the said water flow part comprises 1/3 or more among the perimeters when the said water flow space is made circular.
Thus, the strength of the water flow portion can be increased by configuring the water flow portion to be 1/3 or more of the entire circumference when the water flow space is circular.

As for the piping which concerns on the 5th aspect of this invention, the said water flow part comprises 1/2 or more among the perimeters when the said water flow space is made circular.
Thus, the intensity | strength of a water flow part can be raised more by comprising 1/2 or more of the perimeter when a water flow space is made into a circular shape.

The piping which concerns on the 6th aspect of this invention consists of a cylindrical hard pipe with which the said water flow part opened a part of outer peripheral part, and the said opening was covered with the said expansion / contraction member.
According to this configuration, the joint portion of the pipe and the support portion of the support metal fitting can be a portion other than the expansion / contraction member, that is, a portion where the entire circumference of the hard tube is made of the hard member, and the strength is partially required. It can correspond to places.

The piping which concerns on the 7th aspect of this invention is a pipe body in which the said expansion / contraction member surrounds the said water flow part whole.
According to this structure, since a water flow part can be inserted in an expansion / contraction member and piping can be produced, the effort which attaches an expansion / contraction member to a water flow part can be saved.

The drainage structure according to the eighth aspect of the present invention includes a water flow portion through which water flows and a water flow space that covers the water flow portion, and the water flow when the inside of the water flow space becomes positive pressure. expands from when space is at atmospheric pressure, the water flow space when said water passage space becomes negative pressure by reducing than in atmospheric pressure, changing the volume of the water flow space deflating A pipe having a member, and a drain trap communicating with the pipe.
According to this structure, since the expansion / contraction member can absorb the fluctuation of the air pressure in the pipe, the fluctuation of the air pressure in the drain trap communicating with the pipe can also be absorbed. For this reason, it is possible to prevent the discharge trap from being blown out or broken.

In the drainage structure according to the ninth aspect of the present invention, the expansion / contraction member is a soft member that is softer than the hard member that forms the water flow space, and the support fitting in which the pipe is inclined with the hard member down. Is provided.
According to this configuration, since the hard member is on the lower side, it is possible to maintain a predetermined gradient without the piping being loosened.

  Since this invention was set as the said structure, it can provide the piping and drainage structure which can absorb the fluctuation | variation of an air pressure.

It is a fragmentary sectional view showing roughly the partial composition of the drainage structure concerning a 1st embodiment of the present invention. It is a section perspective view showing roughly the composition of piping concerning a 1st embodiment of the present invention. It is a figure explaining the effect | action of the piping 50 and the drainage structure 10 which concern on 1st Embodiment of this invention. It is a figure explaining the effect | action of the piping 50 and the drainage structure 10 which concern on 1st Embodiment of this invention. (A) is the figure which piled up the piping 50 which concerns on 1st Embodiment of this invention. (B) is the figure which piled up the component of the piping 50 which concerns on 1st Embodiment of this invention separately. It is a schematic block diagram at the time of attaching a support metal fitting to piping, providing a gradient to piping with the water flow part as a hard member facing down. It is the schematic which shows the piping which concerns on 2nd Embodiment of this invention. It is the schematic which shows the piping which concerns on 3rd Embodiment of this invention. It is the schematic which shows the modification of piping which concerns on this invention. It is the schematic which shows the modification of the support metal fitting shown in FIG. It is the schematic at the time of comprising the whole piping with a soft member. It is the schematic at the time of laminating | stacking the conventional piping.

(First embodiment)
Hereinafter, piping and drainage structure concerning a 1st embodiment of the present invention are explained based on a drawing.

-Structure of drainage structure-
First, the structure of the drainage structure according to the first embodiment of the present invention will be described. FIG. 1 is a partial cross-sectional view schematically showing a partial configuration of a drainage structure according to the first embodiment of the present invention.

  The drainage structure according to the first embodiment of the present invention can be applied to various places such as a drainage structure such as a bathtub, a washing machine, a washroom, a toilet, and a kitchen sink. In FIG. Take as an example.

In the unit bath drainage structure 10 shown in FIG. 1, a waterproofing pan 14 for a bathroom as a floor surface of the unit bath is disposed above a floor slab 12 via a support member (not shown).
A bathtub 16 as a container for storing hot water for bathing is arranged on one side of the waterproof pan 14 for a bathroom.

The bathtub 16 is provided with a drain port 18 for discharging hot water accumulated in the bathtub 16 and can be closed with a stopper 20.
The bathroom waterproof pan 14 is provided with a drain port 22 for discharging hot water or the like from the drain port 18 below the drain port 18. An eye plate 24 is attached to the drain port 22.

  Further, a drain pipe 26 for bathtub is connected to the drain port 22. The downstream end of the bathtub drain pipe 26 is connected to a sealed drain trap 28 provided between the bathroom waterproof pan 14 of the unit bath and the floor slab 12.

  The drain trap 28 is provided with an outer cylinder 30 at the top of the floor slab 12. An inflow side connecting pipe 32 to which the bathtub drain pipe 26 is connected is formed on the outer peripheral wall 30 </ b> A of the outer cylinder 30.

  In addition, an outflow portion 34 through which drainage overflowed from the outer tube 30 flows is formed on the outer peripheral portion of the outer tube 30, and an outflow side connection pipe 36 connected to the outflow portion 34 is a pipe according to the first embodiment of the present invention. 50.

  Furthermore, the inner cylinder 40 is inserted into the outer cylinder 30 from the bathroom waterproof pan 14 side so as to form an annular storage space 38 inside the outer cylinder 30. A communication portion 42 through which drainage flows between the outer tube 30 and the inner tube 40 is formed between the lower end portion of the inner tube 40 and the bottom 30 </ b> B of the outer tube 30.

  In addition, the upper part of the inner cylinder 40 is covered with an eye plate lid 46 that fits into a recess 44 formed in the waterproof pan 14 for bathroom, and the drainage stored in the inner cylinder 40 is not directly visible, The hot water used when washing the body, the hot water overflowing from the bathtub 16 and the like can be drained from the eye plate lid 46 to the inner cylinder 40.

−Pipe configuration−
Next, the piping according to the first embodiment of the present invention will be described. FIG. 2 is a cross-sectional perspective view schematically showing the configuration of the piping according to the first embodiment of the present invention.

  The pipe 50 according to the first embodiment of the present invention includes a water flow part 52 through which drainage flows. Specifically, the water flow part 52 is a bowl-shaped thing which cut | disconnected the cylindrical pipe | tube to the length direction, and becomes a structure which drainage flows inside. The water passage 52 is formed of a hard member such as vinyl chloride.

The opening along the longitudinal direction of the water flow portion 52 is covered with a sheet-like expansion / contraction member 56, and the cross-sectional shape of the pipe 50 is substantially circular when the expansion / contraction member 56 is expanded.
Examples of a method for attaching the expansion / contraction member 56 include a method in which an end portion in the width direction of the expansion / contraction member 56 is attached to the opening edge portion 54 of the water supply portion 52 with an adhesive, heat fusion, and the like. The expansion / contraction member 56 and the water flow portion 52 form a water flow space 58, and the expansion / contraction member 56 expands / contracts due to a change in air pressure, thereby changing the volume of the water flow space 58.

  Specifically, the expansion / contraction member 56 starts to expand when the air pressure in the water flow space 58 rises by about 20 Pa from the atmospheric pressure, and the volume of the water flow space 58 increases around 400 Pa from the atmospheric pressure. It expands so that the inside of the water flow space 58 becomes 1.5 times or more from the volume at the atmospheric pressure.

  Examples of the material of the expansion / contraction member 56 that enables such expansion / contraction include soft members that are softer than the hard member that forms the water flow portion 52, and examples thereof include rubber, vinyl, and elastomers other than rubber. If the expansion / contraction member 56 is made of rubber, the expansion / contraction member 56 has a thickness of, for example, 0.1 mm.

-Action-
Next, the operation of the pipe 50 and the drainage structure according to the first embodiment of the present invention will be described.
3 and 4 are diagrams illustrating the operation of the pipe 50 and the drainage structure 10 according to the first embodiment of the present invention.

  In the pipe 50 according to the first embodiment of the present invention, the water flow part 52 and the expansion / contraction member 56 are connected to the substantially circular outflow side connection pipe 36 formed on the peripheral wall of the drain trap 28, and water does not leak from the connection part. It is adhered with a sealing material.

  The expansion / contraction member 56 of the pipe 50 has a large inside of the water passage space 58 shown in FIG. 2 when the inside of the water passage space 58 becomes positive pressure due to, for example, pressure generated by a not-shown vertical pipe communicating with the pipe 50. From the relaxed state at the time of atmospheric pressure (the state of the expansion / contraction member 56 shown by the dotted line in FIG. 2), it expands as shown in FIG. Therefore, even if the inside of the water flow space 58 temporarily becomes positive pressure, the expansion / contraction member 56 expands, the volume of the water flow space 58 is expanded, and the state close to atmospheric pressure can be restored.

  Similarly, the inside of the water flow space 58 of the pipe 50 according to the first embodiment of the present invention may become a negative pressure due to, for example, pressure generated in a not-shown vertical pipe communicating with the pipe 50.

At this time, as shown in FIG. 4, the expansion / contraction member 56 is changed from the state of the expansion / contraction member 56 when the inside of the water flow space 58 shown in FIG. Reduce to. Therefore, even if the inside of the water flow space 58 temporarily becomes negative pressure, the expansion / contraction member 56 is reduced, the volume of the water flow space 58 is reduced, and the state close to the atmospheric pressure can be restored.
Note that the negative pressure means a pressure lower than the atmospheric pressure.

As described above, the expansion / contraction member 56 can absorb the fluctuation of the air pressure in the pipe 50, so that the fluctuation of the air pressure in the drain trap 28 communicating with the pipe 50 can also be absorbed. For this reason, it is possible to prevent the drain trap 28 from being ejected or broken.
For example, in the case of a general trap having a sealing water depth of 50 mm, if it exceeds ± 400 Pa (± 600 Pa in terms of safety factor), spout or breakage occurs, but the pipe 50 according to the first embodiment of the present invention is connected to the drain trap. If it communicates with 28, even if it exceeds ± 400 Pa, no ejection or breakage occurs.
Similarly, it is possible to prevent the ejection trap or the breakage from occurring in the drain trap of another drainage device that joins during drainage.

Here, the diameter of the normal piping is generally determined as follows in order to cope with the drainage amount and air pressure from each instrument.
One case)
-Diameter of appliance drain pipe from bathroom: 50A
-Diameter of appliance drain pipe from toilet: 75A
・ Diameter of appliance drain pipe from basin: 40A
(The drainage horizontal branch pipe will increase by one size when it joins.)

  The above-mentioned setting is a caliber necessary for sufficient drainage including ventilation, but if the pipe 50 of the first embodiment of the present invention is used, the pipe 50 itself absorbs fluctuations in air pressure to some extent. Therefore, there is no problem even if the diameter of the tubular tube forming the water flow portion 52 is made smaller than the currently defined diameter. If the pipe 50 can be made thinner, it is possible to reduce the cost. It is also possible to reduce the space under the floor of the unit bath (the space between the floor slab 12 and the bathroom waterproof pan 14).

  In addition, since the pipe 50 itself absorbs fluctuations in air pressure, the drain trap 28 can withstand a broken seal even if the sealing strength is lower than that of the conventional product. That is, even if the sealing water depth h is less than 50 mm, it can sufficiently withstand from the breakage. Thus, if it is set as the drainage structure 10 which connected the piping 50 and the drain trap 28 which concern on 1st Embodiment of this invention, the floor of the unit bath itself can be lowered | hung etc. and an architectural merit will also improve.

  Here, the expansion / contraction member 56 that expands and contracts as described above is formed of a soft member that is softer than the hard member that forms the water flow portion 52. Conventionally, when a plurality of pipes are stored or delivered, the pipes are bulky as shown in FIG. 12, but the expansion / contraction member 56 is softer than the hard member that forms the water flow portion 52. By using the soft member, as shown in FIG. 5A, the expansion / contraction member 56 made of the soft member of the pipe 50 is contracted, and the hard member of the other pipe 50 is made on the expansion / contraction member 56. By stacking with the water flow portion 52 facing down, the piping 50 can be prevented from being bulky. Further, when the expansion / contraction member 56 is attached to the water passage 52 at the stage of piping, as shown in FIG. 5B, the expansion / contraction member 56 and the water passage 52 are connected during storage or delivery. Can be stacked separately.

Moreover, in the piping 50 which concerns on 1st Embodiment of this invention, the water flow part 52 is a bowl-shaped thing which cut | disconnected the cylindrical pipe | tube to the length direction. That is, 1/2 of the entire circumference when the water flow space 58 is circular is formed.
For this reason, the strength of the pipe 50 can be increased.

Furthermore, although the piping 50 which concerns on 1st Embodiment of this invention can use any of a gradient pipe or a non-gradient pipe, even if it uses it, for example as a gradient pipe, it can construct without a problem similarly to the conventional drainage structure.
Specifically, as shown in FIG. 6, the support fitting 70 is attached to the pipe 50 while providing a gradient to the pipe 50 with the water passage portion 52 of the hard part facing down.

  According to this configuration, since the water passage portion 52 is on the lower side, the pipe 50 can be maintained at a predetermined gradient without slackening. In addition, since the expansion / contraction member 56 is located on the upper side, it is possible to prevent the drainage from coming into contact with the expansion / contraction member 56 even when a large amount of drainage flows into the pipe 50. Therefore, the expansion / contraction member 56 can be prevented from being broken by water.

  Moreover, when connecting the piping 50, the water flow parts 52 are inserted and connected to a socket, and the expansion / contraction member 56 is water-sealed with a separate bonding sheet.

(Second Embodiment)
Next, piping according to a second embodiment of the present invention will be described with reference to FIG.
FIG. 7 is a schematic view showing a pipe according to the second embodiment of the present invention.

In the pipe 100 according to the second embodiment of the present invention, the water flow part 102 through which water flows is configured by a cylindrical hard pipe. An opening 105 is formed at a part of the center of the outer peripheral portion of the water flow portion 102. The opening 105 is covered with an expansion / contraction member 106 to form a water passage space 104.
According to this configuration, for example, the entire peripheral surface of the pipe 50 is held by the support fitting 70, so the pipe 50 does not fall out. Moreover, a cylindrical hard pipe can be used as a joint.

(Third embodiment)
Next, piping according to a third embodiment of the present invention will be described with reference to FIG.
FIG. 8 is a schematic view showing a pipe according to the third embodiment of the present invention.

  The pipe 200 according to the third embodiment of the present invention is configured by surrounding a semicircular bowl-shaped water passage portion 202 with an expansion / contraction member 206. The pipe 200 is a tubular body that becomes substantially cylindrical when the expansion / contraction member 206 expands.

  According to this configuration, since the water passage portion 202 can be inserted into the expansion / contraction member 206 and the pipe 200 can be manufactured, the labor of attaching the expansion / contraction member 206 to the water portion 202 can be saved. For example, although it is preferable to bond the water flow portion 202 and the expansion / contraction member 206, the pipe 200 can be manufactured without bonding the water flow portion 202 and the expansion / contraction member 206.

(Modification)
The present invention is not limited to the above-described embodiment, and various modifications, changes, and improvements can be made.

  For example, in 1st Embodiment of this invention, when the water flow part 52 of the piping 50 is a shape like either one which cut | disconnected the cylindrical pipe | tube in half from the axial direction, ie, water flow Although the case where 1/2 was comprised among the perimeters when the space 58 was made circular was explained, if at least 1/3 or more was constituted among the whole circumferences when the water passing space 58 was made circular, It becomes practical in terms of drainage and strength.

  Moreover, although 1st Embodiment of this invention demonstrated the case where the drainage structure was the drainage structure 10 of a unit bath, the piping 50 which concerns on 1st Embodiment of this invention is in drainage structures, such as a toilet and a washbasin. Is also applicable.

  Moreover, although the shape of the water flow part 52 demonstrated the case where it was a case where it became a shape like either one of what cut | disconnected the cylindrical pipe | tube half from the axial direction, It may be shaped like one of the pipes cut in half from the axial direction.

  Moreover, although 1st Embodiment of this invention demonstrated the case where the piping 50 can absorb the fluctuation | variation of an air pressure with respect to both a positive pressure and a negative pressure, it is at least in any one of a positive pressure or a negative pressure. On the other hand, it is only necessary to absorb fluctuations in air pressure.

  Moreover, although the case where the expansion / contraction member 56 of the piping 50 was attached to the water flow part 52 was demonstrated, it can also be integrally formed with the water flow part 52 by two-color molding etc. Further, when the water flow portion 52 and the expansion / contraction member 56 are separately formed and later attached to the water flow portion 52, as shown in FIG. 9, both ends 54 in the circumferential direction of the water flow portion 52. For example, it is also possible to provide a protrusion 400 extending outward in the circumferential direction, and similarly, to provide a protrusion 402 at both ends of the expansion / contraction member 56 and to bond them with an adhesive or the like.

Further, in FIG. 9, a halved cover portion 404 obtained by cutting a tubular tube in the length direction is attached to the water flow portion 52 together with the expansion / contraction member 56. By such a method, for example, the piping 100 as shown in FIG. 7 can be manufactured.
Moreover, although the support metal fitting 70 shown in FIG. 6 is provided with not only the lower half metal fitting that supports the water flow portion 52 but also the upper half metal fitting so as to cover the expansion / contraction member 56, as shown in FIG. The upper half bracket may be omitted.

DESCRIPTION OF SYMBOLS 10 Drainage structure 28 Drain trap 50,100,200 Piping 52,102,202 Water flow part 56,106,206 Expansion / contraction member 58,104,204 Water flow space 70 Support metal fitting

Claims (9)

A water passage through which water flows,
A water passage space is formed so as to cover the water passage portion, and when the inside of the water passage space becomes a positive pressure, the inside of the water passage space expands more than the atmospheric pressure, and the inside of the water passage space has a negative pressure. and deflating member the water passage space when it becomes that by reducing than in atmospheric pressure, for changing the volume of the water flow space,
With piping. The expansion / contraction member starts to expand when the air pressure in the water passage space rises by 20 Pa from the atmospheric pressure, and when the air pressure in the water passage space rises by 400 Pa from the atmospheric pressure, the volume of the water passage space becomes larger in the water passage space. The pipe according to claim 1 , wherein the pipe expands so as to be 1.5 times or more from a volume when the pressure is atmospheric pressure. The deflating member, the pipe of claim 1 or claim 2 which is a soft flexible member from rigid member forming the water passage section. The pipe according to any one of claims 1 to 3 , wherein the water flow portion constitutes 1/3 or more of the entire circumference when the water flow space is circular. The piping according to claim 4 , wherein the water flow portion constitutes ½ or more of the entire circumference when the water flow space is circular. The pipe according to any one of claims 1 to 5 , wherein the water passing portion is formed of a cylindrical hard pipe having a part of an outer peripheral portion opened and the opening covered with the expansion / contraction member. The piping according to any one of claims 1 to 5 , wherein the expansion / contraction member is a tubular body that surrounds the entire water flow portion. A water flow portion through which water flows, and a water flow space is formed so as to cover the water flow portion, and when the water flow space becomes a positive pressure, the water flow space expands more than atmospheric pressure, by the water passage space is the water passage space when a negative pressure is reduced than when the atmospheric pressure, a pipe having a deflating member to vary the volume of the water flow space,
A drain trap communicating with the pipe;
Drainage structure with The expansion / contraction member is a soft member that is softer than a hard member that forms the water flow space,
The drainage structure according to claim 8 , further comprising a support fitting having a slope on the pipe with the hard member facing down.

Images