JP2014233677A - Water purifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water purifier with high pressure resistance while reducing production costs by maintaining a compact and simple structure with a small number of components.SOLUTION: A water purifier 100 includes: a bottomed cylindrical water purifier main body 40 in which a cleaning cartridge 30 that clarifies a raw water can be housed inside and which has an opening in an upper direction; and a lid 10 that is screwed together with the water purifier main body 40 from an upper direction and blocks the opening of the water purifier main body 40. Both of the water purifier main body 40 and the lid 10 comprise a molded body in which a tabular constructional material is molded, the lid 10 includes a top surface part 19, and a lid side screwing part 13 that droops from a circumference of the top surface part 19 and is screwed together with the water purifier main body 40, and the water purifier main body 40 includes a body side screwing part 42 that extends upward from a circumference of a basilar part 43 and is screwed together with the lid side screwing part 13.

Description

  The present invention includes a bottomed cylindrical water purifier body that can accommodate a purification cartridge for purifying raw water and has an opening upward, and is screwed into the water purifier body from above to close the opening of the water purifier body. The present invention relates to a water purifier comprising a lid.

Conventionally, a water purifier in which a purification cartridge for purifying raw water can be disposed inside has to be replaced every certain period or every time the purification flow of raw water reaches a certain amount. A water purifier main body is provided in a state where it can be separated from each other, and a purification cartridge is detachably disposed therein.
On the other hand, among water purifiers equipped with a purification cartridge that purifies raw water, in water purifiers that are used in the first stop compared to water purifiers that are used in the main stop (water stoppage of raw water) attached to kitchen faucets, etc. Is required to have a pressure resistance against raw water having a high pressure (for example, 0.10 to 1.75 MPa).
As such a water purifier, when a relatively high pressure is applied due to the inflow of raw water, the connection between the lid and the water purifier main body is broken by the pressure, or the lid and the water purifier main body are prevented from being deformed. Therefore, the lid and the water purifier main body are made of a relatively strong material such as stainless steel, and, for example, as shown in Patent Document 1, the connection portion between the lid and the water purifier main body is tightened from the outside. The thing provided with the band mechanism to fix is known (refer patent document 1).
Moreover, in another example, as illustrated in Patent Document 2, the convex portion provided in one of the connecting portions of the lid and the water purifier main body is fitted into the concave portion provided in the other, thereby both The thing which has the structure connected by the helicoid mechanism which connects 2 is known (refer patent document 2).
Furthermore, as another example, a lid-side screwed portion is formed by machining such as cutting on the lid 2 that is configured to be relatively thick by a technique such as casting, and is screwed into the lid-side screwed portion. The main body side screwing part is formed on the outer peripheral surface of the cylinder of the water purifier main body, and the lid side screwing part and the main body side screwing part are screwed together to maintain the connection between the lid body and the water purifier main body. Is known (see Patent Document 3).

JP 2007-75809 A JP 2004-344709 A Japanese Patent No. 3274473

However, for example, in the water purifier disclosed in Patent Document 1, it is necessary to provide a band mechanism for connecting and fixing the lid and the water purifier main body. In order to fasten and fix the lid and the water purifier main body with the band mechanism, as shown in FIGS. 1 and 2 of Patent Document 1, the band mechanism is provided with a flange portion on the lid and the water purifier main body. It is necessary to provide two arc-shaped clamps for sandwiching them, and bolts and nuts for tightening the clamping portions of the clamps. This increases the number of parts, complicates the structure, and increases the manufacturing cost. It was.
In addition, as exemplified in Patent Document 2, regarding the fixing between the lid and the water purifier main body, a member that forms a recess in one of the connection parts of the lid and the water purifier main body even when the helicoid type is adopted. In addition, it is necessary to provide a member for forming a convex part that fits into the concave part on the other side, and an increase in the number of parts and a complicated structure cannot be avoided.
Furthermore, in the technique disclosed in Patent Document 3, a method such as casting is used in order to increase the pressure resistance of a lid body having a raw water inflow portion into which raw water flows at a relatively high pressure and a purified water outflow portion from which purified water flows out. The screw portion is formed by machining such as cutting. Thus, the lid body formed by a method such as casting so that machining such as cutting can be performed has to be relatively large and heavy. As a result, there was a problem in terms of compactness and weight reduction, and it was impossible to make a water purifier with good assembling operability between the lid and the water purifier main body.

  The present invention has been made in view of the above-mentioned problems, and the object thereof is to reduce the manufacturing cost while maintaining a compact and simple configuration with a small number of parts, while achieving high pressure resistance. The point is to provide a water purifier.

A water purifier for achieving the above object is a bottomed cylindrical water purifier main body that can accommodate a purification cartridge for purifying raw water and has an upper opening, and is screwed into the water purifier main body from above. A water purifier comprising a lid that closes the opening of the water purifier main body, the characteristic configuration of which is
Both the water purifier main body and the lid body are formed of a molded body obtained by molding a plate-like structural material,
The lid body is configured to include a lid body side screwing portion that hangs down from the top surface portion and the peripheral edge of the top surface portion and is screwed to the water purifier main body, and the water purifier main body is upward from the peripheral edge of the bottom portion. The main body side screwing portion extends and is screwed to the lid side screwing portion.

According to the above characteristic configuration, both the water purifier main body and the lid body are formed of a molded body obtained by molding a plate-like structural material, so that it is more compact and lighter than those molded by a method such as casting. Can be achieved.
Furthermore, since the lid and the water purifier main body are connected to each other by the screwing of the lid-side threaded portion and the body-side threaded portion, the band mechanism and helicoid mechanism as in the prior art are adopted. There is no need to provide it, and the number of parts can be reduced.
In addition, when both the water purifier main body and the lid body are formed from a molded body obtained by molding a plate-like structural material, the strength thereof is lower than that of a molded body molded thickly by a method such as casting. When raw water is supplied at a relatively high pressure, there is a risk of deformation. Such a deformation is likely to occur in a form in which the top surface bulges from the inside to the outside of the lid when the top surface or the like of the lid is a flat surface, and the raw water formed on the lid by the deformation There is a possibility that problems such as the pipe axis directions of the inflow pipe and the purified water outflow pipe being different from the original pipe axis direction may occur.
Therefore, in the water purifier of the present application, for example, an intermediate expansion that bulges between the periphery of the top surface portion and the inflow / outflow tube holding portion from the inside of the lid body to the outside of the lid body on the top surface portion of the lid body. By adopting a structure that connects at the outlet, an intermediate bulging part that bulges from the inside of the lid to the outside of the lid is provided in advance, and the raw water is supplied at a relatively high pressure and the internal pressure of the water purifier increases. Even if it exists, a deformation | transformation of a cover body can be prevented.
From the above, it is possible to realize a water purifier having a high pressure resistance while maintaining a compact and simple configuration with a reduced number of parts and a reduction in manufacturing cost.

Further features of the water purifier according to the present invention are as follows:
The lid-side threaded portion is formed by forming a screw on both sides of the plate-like body by rolling the outer periphery of the annular shaped plate-like body, and the body-side screwed portion is shaped in an annular shape. The outer periphery of the plate-like body is formed by forming screws on both sides of the plate-like body by rolling.

  According to the above characteristic configuration, the lid-side screwing portion and the water purifier main-body-side screwing portion are formed by forming screws on both sides of the plate-like body by rolling the outer periphery of the annular plate-like plate-like body. Compared with machining such as cutting, the surface shape of the screw can be made smooth, and the screwing with the main body side screw portion can be made smooth.

Further features of the water purifier according to the present invention are as follows:
A concave annular portion is provided on the upper side of the main body-side threaded portion, and the concave annular portion is formed between the lid body and the water purifier main body in a screwed state between the lid body and the water purifier main body. An annular seal member for sealing the gap is provided.

  According to the above characteristic configuration, the seal member that seals between the lid and the water purifier main body is disposed in the recessed annular portion formed on the upper side of the water purifier main body side screwing portion of the water purifier main body. Compared with the case where the seal member is directly provided on the outer peripheral surface of the cylinder of the water purifier main body, when the lid body and the water purifier main body are screwed together, the frictional force generated between the seal member and the lid body is reduced. Can be reduced. As a result, the assembling operability between the lid and the water purifier main body can be improved.

Disassembled perspective view of water purifier Cross section of the water purifier with the purification cartridge Manufacturing process diagram showing the manufacturing process of the water purifier body Manufacturing process diagram showing the manufacturing process of the lid Manufacturing process diagram showing manufacturing process of lid according to another embodiment

The water purifier 100 of this application is demonstrated based on FIG.
The water purifier 100 of the present application has a small number of parts, maintains a compact and simple configuration and can reduce the manufacturing cost, but has a high pressure resistance. It can be suitably applied to cup vendor type vending machines that may be supplied and other uses.
The water purifier 100 is capable of accommodating a purification cartridge 30 for purifying raw water inside and has a bottomed cylindrical water purifier body 40 having an opening 45 in the upper side, and is screwed into the water purifier body 40 from above to form the water purifier. And a lid 10 that closes the opening 45 of the main body 40.

  In the water purifier 100 of the present application, both the water purifier main body 40 and the lid body 10 are formed of a molded body obtained by molding a plate-like structural material by drawing or rolling, and manufactured by a method such as casting. Compared with the manufactured one, the thickness can be reduced, the weight can be reduced, the operability can be improved, and the manufacturing cost can be reduced. However, as described above, when a relatively thin structural material is formed to form the lid and the water purifier main body, raw water is supplied at a relatively high pressure (for example, a pressure of about 0.10 MPa to 1.75 MPa). There is a risk of deformation. Therefore, in the water purifier 100 in the present application, each of the water purifier main body 40 and the lid body 10 is configured as follows.

The lid body 10 includes a top surface portion 19 and a lid body side screwing portion 13 that hangs down from the peripheral portion of the top surface portion 19 and is screwed into the water purifier main body 40, and the raw water inflow pipe 24 into which the raw water flows into the top surface portion 19. And an inflow / outflow pipe holding section 11 that holds the purified water outflow pipe 25 from which purified water flows out in parallel, and the gap between the peripheral edge of the top surface section 19 and the inflow / outflow pipe holding section 11 from the inside of the lid body 10 to the outside. It is configured to be connected by an intermediate bulging portion 12 that bulges toward.
In other words, in this configuration, the lid 10 is connected to the peripheral edge of the top surface portion 19 and the inflow / outflow pipe holding portion 11 by the intermediate bulging portion 12, so that raw water is supplied at a relatively high pressure. Even in this case, the top surface portion 19 of the lid body 10 can prevent the bulging deformation from the inside to the outside. Thereby, the parallel state of the raw | natural water inflow pipe 24 and the purified water outflow pipe 25 normally provided in a parallel state can be maintained.
Here, the inflow / outflow pipe holding part 11 will be described. The plate-like body part 11a that holds the raw water inflow pipe 24 and the purified water outflow pipe 25 in a parallel state, and the pipe-like body part 11a is suspended from the periphery of the plate-like body part 11a. And a cylindrical hanging portion 11b. The intermediate bulging portion 12 is connected to the hanging end of the tubular hanging portion 11b. The cylindrical hanging part 11b also has a function of guiding the connection of the adapter 20 described later to the raw water inflow pipe 24 and the purified water outflow pipe 25 on the inner surface thereof.
Both the raw water inflow pipe 24 and the purified water outflow pipe 25 have the inflow / outflow pipe holding portion 11 in an inflow / outflow state in which a part of the inflow / outflow pipe holding portion 11 is located outside the lid body 10 and the other portion is located inside the lid body 10. It is fixed by welding to the tube holding part 11. The portions of the raw water inflow pipe 24 and the purified water outflow pipe 25 that are located outside the lid body 10 are threaded on the outer periphery, and the raw water inflow pipe 24 is supplied with a raw water supply port through which raw water to be purified is supplied ( The purified water outlet pipe 25 is configured to be connected to a purified water receiving port (not illustrated) of purified water.
The raw water inflow pipe 24 is provided with a check valve 24b for preventing the backflow of the raw water from the inside of the water purifier 100 to the raw water inflow pipe 24 side. Thereby, the purified water from which residual chlorine etc. were removed can be prevented from returning to the upstream side of the raw water inflow pipe 24.

The water purifier main body 40 includes a main body side screwing portion 42 that extends upward from the periphery of the bottom portion 43 and is screwed to the lid side screwing portion 13, and the bottom portion 43 is inward from the outside of the water purifier main body 40. The drawing process retraction part 43a which retreats toward is provided.
With this configuration, even when raw water is supplied at a relatively high pressure, the bottom 43 of the water purifier main body 40 is prevented from bulging and deforming from the inside to the outside.
The open end of the water purifier main body 40 is provided with an annular portion 41 that is continuous with the main body side screwing portion 42 and is recessed along the outer periphery of the cylinder, and an annular sealing member is provided on the recessed annular portion 41. 44 can be arranged. The seal member 44 seals between the inner surface of the lid body 10, and when the lid body side screwing portion 13 of the lid body 10 and the main body side screwing portion 42 of the water purifier main body 40 are screwed together. In order to reduce the frictional resistance, an X packing or a V packing having a small contact area is preferably used.

  As mentioned above, compared to the water purifier used in the front stop (water stoppage of raw water) attached to the kitchen faucet etc., the water purifier used in the front stop has a higher pressure (for example, 0.10 to 0.10). 1.75 MPa) is required for pressure resistance against raw water. In the water purifier 100 of the present invention, even in such a case, the main body side screwing portion 42 and the lid body side screwing portion 13 are arranged so that the screwing state between the lid body 10 and the water purifier main body 40 is appropriately maintained. , That is, the thread height is 1.5 mm or more (2.0 mm in this embodiment), and the number of threads is 3 or more (6 in this embodiment). In addition, this is a case where the outer diameter of the water purifier main body 40 is about 80-90 mm, and when the outer diameter of the water purifier main body 40 increases more than this, with an increase in the outer diameter, the thread height is increased. And increasing the number of threads.

  In addition, regarding the connection between the lid 10 and the water purifier main body 40, as in the present invention, the configuration in which the lid side screwing portion 13 and the main body side screwing portion 42 are connected by screwing is the helicoid type described in the related art. Compared with the case where it connects by, the mutual rotation angle at the time of the assembly | attachment of the cover body 10 and the water purifier main body 40 can be taken large. In other words, in the case of the helicoid type, it is about 1/4 to 1/6 rotation, but in the water purifier 100 of the present invention, it rotates 2 to 3 times. For this reason, as in the present invention, the configuration in which the lid 10 and the water purifier main body 40 are connected by the screwing of the lid-side screwing portion 13 and the main-body-side screwing portion 42 is compared to the case of connecting the helicoid type. The seal margin by the seal member 44 can be increased, and water leakage from between the lid 10 and the water purifier main body 40 can be prevented more favorably.

Inside the water purifier 100, the raw water inflow pipe that retreats from the inflow / outflow pipe holding portion 11 of the lid 10 to the inside of the water purifier 100 when the lid 10 is screwed to the water purifier main body 40. 24 is provided with an adapter 20 for connecting the base end side end of 24, the base end side end of the purified water outflow pipe 25 that also retreats into the water purifier 100, and the purified water discharge port 31a of the purification cartridge 30. Yes.
The adapter 20 is connected to the base end side end of the raw water inflow pipe 24, and raw water from the base end side end of the raw water inflow pipe 24 is formed outside the purification cartridge 30 inside the water purifier 100. A first connection portion 21 that leads to the external flow path 50, a second connection portion 22 that connects to the proximal end of the purified water outlet pipe 25, and a third connection portion 23 that connects to the purified water discharge port 31 a of the purification cartridge 30. The 2nd connection part 22 and the 3rd connection part 23 are connected in communication.
The first connection part 21 and the second connection part 22 of the adapter 20 are connected to the base end side end of the raw water inflow pipe 24 and the purified water outflow pipe 25 in the cylindrical hanging part 11b of the inflow / outflow pipe holding part 11 described above. Connection to the proximal end is guided.

The purification cartridge 30 includes an upper end side member 31 having a purified water discharge port 31 a and a lower end side member 32 supported by the bottom 43 of the water purifier main body 40 in a screwed connection state of the lid body 10 and the water purifier main body 40. And a cylindrical purification section is provided between them.
The cylindrical purification section is composed of an outer filter 33a made of a nonwoven fabric, a first filter medium 33b made of granular activated carbon or fibrous activated carbon, an inner filter 33c made of nonwoven fabric, a cylindrical core material 33d, in order from the outer side in the axial direction. A second filter medium casing 33e having a second filter medium 33g made of a hollow fiber membrane inside is provided.
The raw water flowing in from the raw water inflow pipe 24 is guided to the external flow path 50 via the first connection portion 21 of the adapter 20, and the outer filter 33a is moved in the axial direction (arrow Y direction in FIG. 2) through the purification cartridge 30. The first filter medium 33b and the inner filter 33c are then purified. Further, after passing through the cylindrical core material 33d, it flows into the inside of the second filter medium casing 33e through the opening 32h provided in the second filter medium casing 33e, and the turbidity is mainly removed by the second filter medium 33g. It becomes purified water. The purified water flows out from the purified water outflow pipe 25 through the third connection part 23 and the second connection part 22 of the adapter 20.

  Here, the water purifier 100 is arrange | positioned by making the front end side of the arrow X into upper direction in FIG. When arranged in this manner, bubbles may accumulate on the upper side of the water purifier 100, that is, in the vicinity of the intermediate bulging portion 12 of the lid 10 at the start of supply of raw water. Therefore, the intermediate bulging part 12 is provided with an air vent part 14 for releasing the bubbles to the outside. When the supply of raw water is started, the air vent 14 is opened, so that air that may accumulate inside the water purifier 100 is reliably discharged to the outside.

〔Manufacturing process〕
In the water purifier 100 of the present invention, as described above, both the water purifier main body 40 and the lid body 10 are configured by mutually connecting a plurality of molded bodies obtained by molding plate-like structural materials. As in the technique described in the technical document 3, as compared with those manufactured by a method such as casting, the size and weight can be reduced, and the assembling operability can be improved. Hereinafter, the manufacturing process will be described with reference to FIGS.

The manufacturing process of the water purifier main body 40 is demonstrated based on FIG. The water purifier main body 40 can be obtained by forming a disk-like plate-like body S1, a rectangular plate-like body S2, and a disk-like plate-like body S3 and then welding them.
The bottom 43 is formed by forming a disc-like plate-like body S1 on the outer edge by drawing and forming a peripheral portion 49 on the outer edge, with the central side extending from the peripheral portion 49 to one side in the plate thickness direction (arrow X side at # 301 in FIG. 3). As the bottom, the drawing retraction portion 43a having a large retraction amount is formed toward the center side (# 301), and the outer edge portion formed on the outer side in the radial direction of the peripheral edge portion 49 is removed by parting off (# 302). Get it.
In addition, when the outer diameter (L1 in FIG. 3) of the water purifier main body 40 is 80 to 90 mm, the drawing retraction part 43a performs drawing with a sphere having a radius of curvature R1 of about 55 to 65 mm, preferably 60 mm. To form. With this processing, the drawing depth (L2 in FIG. 3) of the processing retraction portion 43a is about 15 mm.
Next, the main body side screwing portion 42 forms the rectangular plate-like body S2 into an annular shape by welding the end portion in the short axis direction (# 303), and a part of its outer periphery is drawn by drawing. It is obtained by bulging outward in the radial direction (# 304), forming a screw 42a by rolling at the bulged portion (# 305), and removing the cylindrical portion formed at one end of the screw 42a by parting off. (# 306).
Next, the annular concave annular portion 41 is formed into a shallow dish shape having a disc-shaped plate-like body S3 having a plate edge portion 46 by drawing and an outer edge portion 47 extending outward in the radial direction of the plate ( # 307), the dish bottom is removed by drilling (# 308), the hole edge 48 is tilted outside the dish edge 46 (# 309), the outer edge portion 47 of the dish edge 46, the hole edge 48, Is obtained by crushing until it is in an opposing state (# 310).
Finally, the bottom portion 43, the main body side screwing portion 42, and the recessed annular portion 41 are welded to form the water purifier main body 40 (# 311).

The manufacturing process of the lid 10 will be described with reference to FIG. The lid 10 is obtained by forming and welding a disk-shaped plate S5 and a rectangular plate S4.
The top surface portion 19 is formed by drawing a disk-shaped plate-like body S5 to form an annular peripheral portion 15 on the outer edge, and the center side is one side in the thickness direction from the peripheral portion 15 (# 401 in FIG. The squeezed bulging portion 16 having a larger bulging amount toward the center side is formed on the side) (# 401). , And a hole 17 for welding the raw water inflow pipe 24 and the purified water outflow pipe 25 is formed by drilling in the inflow / outflow pipe holding section 11 (# 402). The outer end formed on the outside is removed by projecting (# 403), and the raw water inlet pipe 24 and the purified water outlet pipe 25 are welded to the hole 17 formed by drilling # 402 (# 404). ).
In addition, the site | part except the inflow / outflow pipe holding | maintenance part 11 among the drawing process expansion parts 16 becomes the intermediate expansion part 12 by the said process. Further, when the outer diameter (L3 in FIG. 4) of the lid 10 is 80 to 90 mm, the drawing bulging portion 16 is formed by drawing with a sphere having a curvature radius R2 of about 60 mm to 70 mm. .
Next, the lid-side threaded portion 13 forms a rectangular plate-like body S4 into an annular shape by welding its short axis end (# 405), and a thread is formed on the outer periphery by rolling. (# 406) and both ends of the screw are removed by projecting (# 407).
The lid body side screwing portion 13 and the top surface portion 19 are welded to form the lid body 10 (# 408).

[Another embodiment]
(1) In the above embodiment, the seal member 44 is provided with a V seal or an X seal so as to reduce the frictional resistance when the main body side screwing portion 42 and the lid side screwing portion 13 are screwed together. Although the preferable point was demonstrated, the function of the water purifier 100 can be exhibited satisfactorily even if a sealing member having a shape such as a K seal or a D seal is used in addition to the O-ring.
(2) In the above embodiment, the purification cartridge 30 includes the second filter medium 33g made of a hollow fiber membrane. However, the second filter medium 33g may not be provided separately. In this case, the raw water is purified only by the first filter medium 33b made of granular activated carbon, fibrous activated carbon, or the like.
(3) In the above embodiment, in the manufacturing process of the lid body 10 shown in FIG. 4, the lid body 10 is formed by welding the rectangular plate-like body S4 and the disk-like plate-like body S5. An example to get is shown.
However, from the viewpoint of reducing the number of manufacturing steps and reducing costs, the lid body 10 is preferably obtained by molding only a disk-shaped plate-like body S6 as shown in FIG. 5 below.
In the manufacturing process, after forming a large-diameter peripheral portion 61 having an annular shape and a large diameter (inner diameter indicated by L4 in FIG. 5) on the outer edge by drawing the disk-like plate-like body S6, A small-diameter peripheral portion 15 having a smaller diameter than the radial peripheral portion 61 (inner diameter indicated by L3 in FIG. 5, L3 <L4) is formed, and the center side is one side in the plate thickness direction from the small-diameter peripheral portion 15 (the tip of arrow X in FIG. 5). The swelled bulged portion 16 having a larger bulging amount is formed on the side (# 501).
Next, a screw is formed as a lid-side threaded portion 13 by rolling on the large-diameter peripheral edge portion 61 (# 502), and the lower side of the lid-side threaded portion 13 (the base end side of arrow X in FIG. 5). Is removed by parting off (# 503).
Thereafter, in order to provide the raw water inflow pipe 24 and the purified water outflow pipe 25 in the squeezed bulging portion 16, the same steps as # 402 to # 404 are executed to obtain the lid body 10.

  The water purifier of the present invention has a small number of parts, and while maintaining a compact and simple configuration and reducing the manufacturing cost, the water purifier used in the first stop that requires high pressure resistance, for example, It can be used effectively as a cup bender vending machine or as an under-sink type water purifier.

DESCRIPTION OF SYMBOLS 10: Lid 11: Inflow / outflow pipe holding | maintenance part 11a: Plate-shaped body part 11b: Cylindrical drooping part 12: Intermediate bulging part 13: Lid side screwing part 15: Perimeter part 16: Drawing process bulging part 19: Top Surface part 24: Raw water inflow pipe 25: Purified water outflow pipe 30: Purification cartridge 40: Water purifier main body 41: Recessed annular part 42: Main body side screwing part 42a: Screw 43: Bottom part 43a: Drawing process retraction part 44: Seal member 45 : Opening 46: Dish edge 49: Perimeter 100: Water purifier

Claims (4)

A bottomed cylindrical water purifier main body that can store a purification cartridge for purifying raw water and has an opening upward, and a lid that is screwed into the water purifier main body from above to close the opening of the water purifier main body. A water purifier comprising:
Both the water purifier main body and the lid body are formed of a molded body obtained by molding a plate-like structural material,
The lid body is configured to include a lid body side screwing portion that hangs down from the top surface portion and the peripheral edge of the top surface portion and is screwed to the water purifier main body, and the water purifier main body is upward from the peripheral edge of the bottom portion. A water purifier comprising a main body side screwing portion that extends and screwed into the lid side screwing portion.   The lid-side threaded portion is formed by forming a screw on both sides of the plate-like body by rolling the outer periphery of the annular shaped plate-like body, and the body-side screwed portion is shaped in an annular shape. The water purifier according to claim 1, wherein a screw is formed on both sides of the plate-like body by rolling the outer periphery of the plate-like body.   A concave annular portion is provided on the upper side of the main body-side threaded portion, and the concave annular portion is formed between the lid body and the water purifier main body in a screwed state between the lid body and the water purifier main body. The water purifier of Claim 2 by which the cyclic | annular sealing member which seals between is arrange | positioned.   The top surface portion is provided with an inflow / outflow tube holding portion for holding a raw water inflow pipe into which raw water flows in and a purified water outflow tube from which purified water flows out in parallel to the top surface portion, and a peripheral edge of the top surface portion and the inflow / outflow pipe The water purifier as described in any one of Claims 1-3 comprised by connecting with the holding | maintenance part by the intermediate | middle bulging part which bulges toward a cover body outer side from a cover body inner side.

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