JP2003097531A - Female screw and male screw - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a female screw (male screw) having generality possible to be screwed to several kinds of male screws (female screws) having at least a different pitch, outer diameter (inner diameter) or valley diameter. SOLUTION: A female screw part 6 has a valley diameter 6V larger than the outer diameters 5WT and 5MT of male screw parts 5W and 5M as the maximum diameter, and an inner diameter 6T within a range between the valley diameter 5MV of the male screw part 5M as the maximum valley diameter and the outer diameters 5WT and 5MT as the maximum outer diameter, and a pitch 6P within a range between a pitch 5M as the minimum pitch and a pitch 5WP as the maximum pitch, and a length 6L set at a value larger than the minimum pitch 5MP and smaller than the least common multiple of the minimum pitch 5MP and the maximum pitch 5WP.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw having versatility capable of being screwed into a plurality of types of screws having different pitches, inner diameters, outer diameters, root diameters and the like.

[0002]

2. Description of the Related Art Kitchen sinks, washrooms, bathrooms, etc.
A water supply or hot water supply faucet 90 as shown in FIG. 8 is installed, and a foam cap 92 for relieving the water discharge pressure is attached to a water discharge port 91 of these water faucet 90. A female screw portion (or a male screw portion) is formed on the inner peripheral surface of the upper end of the foam cap 92, and the female screw portion (or the male screw portion) is screwed into the male screw portion (or the female screw portion) formed in the discharge port 91. The foam cap 92 is fixed to the spout 91.

In addition to the foam cap 92, which is attached to the water outlet 91 of the water faucet 90, a rectifying cap having the function of rectifying the flow of the discharged water, and a kitchen spray having the function of making the flow of the discharged water into a shower shape. Also, there are branch fittings and the like having a branch switching function in water purifiers and dishwashers, both of which are fixed to the spout of the faucet via a screw mechanism.

Regarding the threaded portion of the faucet of the faucet, generally, there are two kinds of series, that is, a wit type screw (W thread) and a metric type screw (M thread). The peak shape, outer diameter, valley diameter, effective diameter, etc. are different from each other. Generally, wit type screw "W22 mountain 20" is used for foam cap of kitchen faucet, but wit type screw and metric screw "M22 P = 1" Are used together. Therefore, the faucet installed at the time of construction is equipped with a foam cap suitable for the screw type of each spout.

[0005]

The faucet 90 shown in FIG.
If the foam cap 92 or the like attached to the spout 91 is deteriorated or damaged due to secular change or if a new functional member (water purifier, shower, etc.) is to be added, loosen the screw part and spout 91 Although it has been removed from the product and replaced with a new foam cap, etc., there is no compatibility between the W thread series screw and the M thread series screw described above, and the difference between them is only the appearance. It is extremely difficult to determine with. Therefore, the foam cap 93 that has been selected and purchased from the commercially available foam caps only by visual confirmation cannot be screwed into the spout 91 of the faucet 90,
There is a problem of having to go to a store again and buy a new one.

The above-mentioned foam cap of the kitchen faucet is mainly "W22 mountain 20", and the foam cap of the bathroom faucet is "W22 mountain 20" or "M22 P =".
Since the distinction of "1" is not always strictly adhered to, and these may be reversed depending on the construction site, it is possible to judge the screw type of the foam cap from the place where the faucet is installed. Instead, cap buyers and others are confused. There are various problems such as incompatibility of screw type such as rectification cap other than foam cap, water purifier that can be detachably attached to the tip of kitchen spray or spout, or switching device for rectification and foam spouting etc. The same applies to devices with variations.

On the other hand, even at water equipment dealers that sell foam caps, flow control caps, etc. as replacement parts, two types of caps, one for wit type screws and the other for metric type screws, are in stock. It is not only necessary to keep it in mind, but it is complicated because it is necessary to explain the difference between the two to the person who wants to buy the cap and judge the cap that suits the screw type of the faucet and sell it each time. . Also, on the manufacturer side such as a dishwasher and a water purifier that can be detachably attached to the tip of the spout, it is necessary to bundle two types of mounting adapters for each type of screw, so not only the parts cost Management costs were also high.

The present invention has been made to solve such a problem in a foam cap of a water faucet, and the problems to be solved by the present invention include pitch, outer diameter (or inner diameter), and valley diameter. It is to provide a male screw and a female screw having versatility capable of being screwed into a plurality of types of male screws (or female screws) having different types.

[0009]

A female screw of the present invention is a female screw that can be screwed into a plurality of types of male screws having different pitches, outer diameters, root diameters, and screw shapes, and the root diameter is the male thread. Larger than the maximum outer diameter, the inner diameter is in the range of the maximum root diameter and the maximum outer diameter of the male screw, the pitch has a female thread portion in the range of the minimum pitch and the maximum pitch of the male screw,
The length of the female screw portion is larger than the minimum pitch and smaller than the least common multiple of the minimum pitch and the maximum pitch.

With such a structure, when the female screw of the present invention is screwed into the male screw to be screwed, the root diameter of the female screw portion is larger than the maximum outer diameter of the male screw and the inner diameter of the female screw portion is larger than that of the male screw. By being within the range of the maximum root diameter and the maximum outer diameter, the engagement between the threads of the female thread and the male thread is secured,
The pitch of the internal thread is within the range of the minimum pitch and the maximum pitch of the external thread, and the length of the internal thread is larger than the minimum pitch and smaller than the least common multiple of the minimum pitch and the maximum pitch. Since it is possible to move axially with at least part of the threads engaged with the threads of the male thread, it is possible to screw on multiple types of male threads with different pitch, outer diameter, or root diameter. A female screw having versatility that can be obtained is obtained.

Here, by making the inner diameter of the female screw portion smaller than the arithmetic mean value of the maximum root diameter and the maximum outer diameter of the male screw, when the female screw is screwed into the male screw, The radial length of the engaging portion between the thread and the thread of the male thread is more than half of the height of each thread, and the so-called engagement ratio can be secured at 50% or more, so that a sufficient tightening force can be obtained. .

Further, since the length of the female screw portion is set to be twice the pitch of the female screw portion or more, a screw thread is formed to the extent that the inner peripheral surface of the female screw portion is rounded two or more times.
A female screw suitable for the case where the pitch variation range of a plurality of types of male screws to be screwed is about 0% to 20% is obtained.

Next, the male screw of the present invention has a pitch, an inner diameter,
A male screw that can be screwed into a plurality of types of female threads having different root diameters or screw shapes, the root diameter being smaller than the minimum inner diameter of the female thread, and the outer diameter being the range of the minimum inner diameter and the maximum valley diameter of the female thread. And having a male thread portion having a pitch within the range of the minimum pitch and the maximum pitch of the female thread, and the length of the male thread portion being larger than the minimum pitch and being smaller than the least common multiple of the minimum pitch and the maximum pitch. It is characterized by being.

With such a structure, when the male screw of the present invention is screwed into the female screw to be screwed, the root diameter of the male screw portion is larger than the minimum inner diameter of the female screw, and the outer diameter of the male screw portion is the female screw. Since it is within the range of the minimum inner diameter and the maximum root diameter of the, the engagement between the threads of the male screw portion and the female screw is secured,
The pitch of the male thread is within the range of the minimum pitch and the maximum pitch of the female thread, and the length of the male thread is larger than the minimum pitch and smaller than the least common multiple of the minimum pitch and the maximum pitch. Since it is possible to move in the axial direction with at least a part of the internal thread always engaged with the thread of the internal thread, it is possible to screw into multiple types of internal threads with different pitch, outer diameter, or root diameter. It is possible to obtain a male screw having versatility that can be combined.

Here, by making the outer diameter of the male screw portion larger than the arithmetic mean value of the minimum inner diameter and the maximum root diameter of the female screw, when the male screw is screwed into the female screw, The radial length of the engaging portion between the screw thread and the screw thread of the female screw is more than half the height of each screw thread, and a so-called engagement ratio of 50% or more can be secured, so a sufficient tightening force can be obtained. .

Further, by setting the length of the male threaded portion to be twice the pitch of the male threaded portion or more, a screw thread is formed to the extent that the outer peripheral surface of the male threaded portion is rounded two or more times.
A male screw suitable for a case where the pitch variation range of a plurality of types of female screws to be screwed is about 0% to 20% can be obtained.

[0017]

1 is a sectional view showing a water-saving rectifying cap according to a first embodiment of a female screw of the present invention, FIG.
FIG. 3 is a cross-sectional view showing a screwed state of the water-saving rectifying cap and the water outlet shown in FIG. 1.

As shown in FIG. 1, the water-saving rectifying cap 1 of this embodiment is used by being attached to a water outlet 3 of a faucet 2, and is formed on the inner periphery of the upper end portion and on the outer periphery of the lower end portion of the water outlet 3. A female screw portion 6 that can be screwed into the formed male screw portion 5 is provided.

As for the male screw portion 5 of the spout 3, the faucet 2
Depending on the type and manufacturer, as shown in Fig. 2, the wit type male thread 5W and the metric male thread 5
There are two types, M, and these male screw parts 5W and 5M have the same outer diameters 5WT and 5MT, but the pitch is 5W.
P, 5MP and valley diameters 5WV, 5MV are different from each other. Wit male thread 5W is "W22 thread 2
0 ", and the metric male screw portion 5M is" M22 P =
1 ".

The female thread portion 6 of the water-saving rectifying cap 1 has a valley diameter 6V larger than the outer diameters 5WT and 5MT of the male thread portions 5W and 5M, which are the maximum outer diameters, and the inner diameter 6T is the metric male thread having the maximum valley diameter. Within the range of the valley diameter 5MV of the portion 5M and the outer diameters 5WT and 5MT, which are the maximum outer diameters, and the pitch 6P.
Is within the range of the pitch 5MP which is the minimum pitch and the pitch 5WP which is the maximum pitch, and the length 6L of the internal thread portion 6 is larger than the minimum pitch 5MP and the minimum pitch 5MP.
And smaller than the least common multiple of the maximum pitch 5WP. That is, the female thread portion 6 of the water-saving rectifying cap 1 is formed with a screw corresponding to the wit type “W22.438 crest 24”.

When the female screw portion 6 of the water-saving rectifying cap 1 of this embodiment is screwed into the male screw 5 of the water discharge port 3 to be screwed, the root diameter 6V of the female screw portion 6 is the maximum outer diameter of the male screw portion 5. It is larger than 5WT and 5MT, and the inner diameter 6T of the female screw portion 6 is within the range of the maximum root diameter 5MV and the maximum outer diameter 5WT, 5MT of the male screw 5, so that the engagement between the female thread portion 6 and the male thread 5 is 5m, 6m. Is ensured, and the pitch 6P of the female screw portion 6 is the minimum pitch 5MP and the maximum pitch 5W of the male screw portion 5.
Within the range of P, the length of the female screw portion 6 is the minimum pitch 5
Since it is larger than MP and smaller than the least common multiple of the minimum pitch 5MP and the maximum pitch 5WP, a part of the thread 6m of the female threaded portion 6 moves in the axial direction in a state of engaging with the thread 5m of the male threaded portion 5. It is possible to go.

Therefore, the female screw portion 6 of the water-saving straightening cap 1 has pitches 5MP and 5WP and root diameters 5MV and 5W.
It can be screwed into any of the two types of male screw portions 5M and 5V having different Vs. As a result, the water-saving rectification cap 1 has versatility in which the male screw portion 5 of the water discharge port 3 can be screwed and removed without any trouble regardless of whether the male screw portion 5W of the wit type or the male screw portion 5M of the metric type. .

Further, in the water-saving rectifying cap 1, since the inner diameter 6T of the female threaded portion 6 is smaller than the arithmetic mean value of the maximum root diameter 5MV of the male threaded portion 5 and the maximum outer diameters 5MT and 5WT, the female threaded portion is formed. When 6 is screwed into the male screw part 5,
The radial length D1 of the engaging portion between the thread 6m of the female thread portion 6 and the thread 5m of the male thread portion 5 is
It becomes more than half of the height of m and 6 m, and a so-called engagement ratio of 50% or more can be secured, whereby a sufficient tightening force can be obtained.

Further, in the present embodiment, the length 6L of the female screw portion 6 corresponds to about 3 times the pitch 6P of the female screw portion 3
Since the screw thread 6m that makes about 3 turns around the inner peripheral surface of the female screw portion 6 is formed by setting the thickness to mm, the pitches 5MP and 5WP between the wit system male thread portion 5W and the metric system male thread portion 5M to be screwed together are formed. Even if the variation range is about 0% to 20%, there is no hindrance to the rotation of the water-saving rectification cap 1 at the time of attachment / detachment, and the screwed state is good.

Next, with reference to FIG. 3, a female screw 20 according to a second embodiment of the present invention will be described. The female screw portion 21 of the female screw 20 has a valley diameter 21V larger than the outer diameter 23T of the male screw 23 having the maximum outer diameter, and the inner diameter 21T of the female screw portion 21 has a valley diameter 23V of the male screw 23 having the maximum valley diameter.
It is within the range of the outer diameter 23T which is the maximum outer diameter, and the pitch 21
P is the pitch 23P of the male screw 23 which is the minimum pitch,
It is within the range of the pitch 22P of the male screw 22 which is the maximum pitch, and the length 21L of this female screw portion 21 is the pitch 21P.
3 mm, which is about three times as large as In this embodiment, the male screw 22 is a Wit thread “W22 crest 20”.
And the male screw 23 is a metric screw “M22 P =
1.0 ", and the female thread portion 21 has a wit type" W ".
A screw corresponding to a 22.4 crest 24 "is formed.

In the present embodiment, the internal diameter 21T of the internal thread portion 21 is the maximum root diameter 23V of the external thread 23 and the maximum outer diameter 2 thereof.
Since it is larger than the arithmetic average value with 3T, when the female screw portion 21 is screwed into the male screw 23 or the male screw 22, the screw thread 21m of the female screw portion 21 and the screw threads 22 of the male screws 22 and 23 are screwed.
Radial lengths D22, D of engageable parts with m, 23m
23 is less than half the height of the respective threads 22m, 23m. Therefore, the so-called coverage rate is 50.
%, But if the load is small like the water-saving rectifying cap 1 and it is securely screwed in contact, it can be said that the screwed state is good without rattling. Other functions and effects are the same as those of the female screw portion 6 of the first embodiment.

Next, with reference to FIG. 4, an internal thread 30 according to a third embodiment of the present invention will be described. The root diameter 31V of the female thread portion 31 of the female thread 30 is larger than the outer diameters 33T and 34T of the male threads 33 and 34 that are the maximum outer diameters, and the inner diameter 31T of the female thread portion 31 is the root diameter of the male thread 34 that is the largest root diameter. 34V and the outer diameters 33T and 34T which are the maximum outer diameters, and the pitch 31P is the pitch 33 of the male screw 33.
It is within the range of P and the pitch 32P of the male screw 32, and the length 31L of the female screw portion 31 is 5 mm, which is about 5 times the pitch 31P. In the present embodiment, the male screw 33 is a wit type screw “W22 thread 24”, the male screw 34 is a metric screw “M22 P = 1.0”, and the female screw portion 31 has a wit type “W22. 3 mountains 2
5 "is formed.

A male screw 33 to be screwed with the female screw 30,
34, their outer diameters 33T and 34T are equal, and the root diameter 33T
Since V and 34V are also close to each other and the pitches 33P and 34P are relatively close to each other, the length 31L of the female screw portion 31 is made relatively long, and the inner peripheral surface of the female screw portion 31 is rotated about four times. It is possible to secure a thread length of 31 m. Therefore, it is possible to secure a relatively wide engagement portion with the male screws 33 and 34, and it is possible to obtain a strong screwed state. Other functions and effects are the same as those of the female screw portion 6 of the first embodiment or the female screw 30 of the second embodiment.

In the first embodiment, the female screw portion 6 of the water-saving rectifying cap 1 which can be attached to and detached from the water outlet 3 of the water faucet 2 will be described. In the second and third embodiments, the female screw 20, 3 will be described.
However, the present invention is not limited to these and can be widely used as a female screw member other than caps for faucets or a screw in other fields.

Next, with reference to FIG. 5, a female screw 40 according to a fourth embodiment of the present invention will be described. 5A is a plan view showing a faucet tip branch valve 41 having an internal thread 40 inside the attachment / detachment portion 45, and FIG. 5B is a plan view of the faucet tip branch valve 4.
It is a front view of 1.

The faucet tip branch valve 41 shown in FIG. 5 is used to connect the spout 3 of the faucet 2 shown in FIG. 1 and an ion generator (not shown). The foam cap attached to the water discharge port 2 of No. 2 is removed, and the female screw 40 of the attachment / detachment portion 45 is screwed onto the water discharge port 3 and tightened to fix the entire faucet tip branch valve 41 to the water discharge port 3. Then, the projecting pipes 42 and 43 provided on the back surface of the faucet end branch valve 41 and the ion generator are connected via the water passage pipe 44.

Since the female screw 40 of the attaching / detaching portion 45 is formed with a screw similar to the female screw portion 6 of the water-saving rectifying cap 1 of the first embodiment, the faucet tip branch valve 41 has the male screw portion of the water outlet 3 as a wit. Both of the system male screw portion 5W and the metric male screw portion 5M have versatility that they can be screwed and removed without any trouble. Other functions and effects of the female screw 40 are the same as those of the female screw portion 6 of the water-saving rectifying cap 1.

Next, referring to FIGS. 6 and 7, fifth and sixth embodiments of the present invention will be described. FIG. 6 is a vertical sectional view showing a kitchen spray 52 having a female screw 50 according to the fifth embodiment inside the attaching / detaching portion 51, and FIG. 7 is a kitchen spray 6 having a female screw 60 according to the sixth embodiment inside the attaching / detaching portion 61.
It is a longitudinal cross-sectional view of FIG.

Kitchen spray 52 shown in FIGS. 6 and 7,
Each of 62 is to be used by being attached to the water outlet 3 of the water faucet 2 shown in FIG. 1, and similarly to the above, the foam cap attached to the water outlet 3 of the water faucet 2 is removed to make the water outlet 3 The entire kitchen sprays 52, 62 are fixed to the water outlet 3 by screwing the female screws 50, 60 of the attachment / detachment parts 51, 61 onto and tightening them. The main body parts 53 and 63 are detachable parts 5
1, 61 can be tilted about the center, and the water supplied from the water outlet 3 is discharged from the bottom surfaces of the main bodies 51, 61, respectively.

Since the female screws 50 and 60 of the attaching / detaching portions 51 and 61 are formed with the same screws as the female screw portion 6 of the water-saving rectifying cap 1 of the first embodiment, the kitchen spray 52,
In 62, the male screw portion of the water discharge port 3 is a wit type male screw portion 5W.
It has the versatility of being able to be screwed in and removed without any trouble in any of the metric male screw section 5M. Female screw 5
The other functions and effects of 0 and 60 are the same as those of the female screw portion 6 of the water-saving rectifying cap 1.

The male screw of the present invention may be formed by applying the same structure as the female screw described above to the male screw, and the same function and effect as described above can be obtained.

[0037]

According to the present invention, the following effects are exhibited.

(1) The root diameter is larger than the maximum outer diameter of the male thread, the inner diameter is within the range of the maximum root diameter and the maximum outer diameter of the male thread, and the pitch is within the range of the minimum pitch and the maximum pitch of the male thread. By having a female threaded portion and the length of the female threaded portion being larger than the minimum pitch and smaller than the least common multiple of the minimum pitch and the maximum pitch, a plurality of types having different pitches, outer diameters, and root diameters A general-purpose female screw that can be screwed into a male screw can be obtained.

(2) By making the inner diameter of the female screw portion smaller than the arithmetic mean value of the maximum root diameter and the maximum outer diameter of the male screw, when the female screw is screwed into the male screw, Since the engagement rate can be 50% or more, sufficient tightening force can be obtained.

(3) Since the length of the female threaded portion is set to be twice the pitch of the female threaded portion or more, a screw thread is formed to the extent that the inner circumferential surface of the female threaded portion is rounded two or more times.
A female screw suitable for the case where the pitch variation range of a plurality of types of male screws to be screwed is about 0% to 20% is obtained.

(4) The root diameter is smaller than the minimum inner diameter of the female thread, the outer diameter is within the range of the minimum inner diameter and the maximum valley diameter of the female thread, and the pitch is within the range of the minimum pitch and the maximum pitch of the female thread. Having a male threaded portion, the length of the male threaded portion is larger than the minimum pitch and smaller than the least common multiple of the minimum pitch and the maximum pitch, so that a plurality of types of pitch, outer diameter, or valley diameter are different. A general-purpose male screw that can be screwed into a female screw can be obtained.

(5) By making the outer diameter of the male thread larger than the arithmetic mean value of the minimum inner diameter and the maximum root diameter of the female thread, when the male thread is screwed into the female thread, Since the engagement rate can be 50% or more, sufficient tightening force can be obtained.

(6) Since the length of the male screw portion is set to be twice or more the pitch of the male screw portion, a screw thread is formed to the extent that the outer peripheral surface of the male screw portion is rounded two or more times.
A male screw suitable for a case where the pitch variation range of a plurality of types of female screws to be screwed is about 0% to 20% can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a water-saving rectifying cap that is a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a screwed state of the water-saving rectifying cap and the water outlet shown in FIG.

FIG. 3 is a cross-sectional view showing a screwed state of a water-saving rectifying cap and a water outlet which is a second embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a screwed state of a water-saving rectifying cap and a water outlet which are the third embodiment of the present invention.

FIG. 5 (a) is a plan view of a faucet tip end branch valve provided with an internal thread according to a fourth embodiment of the present invention, and FIG. 5 (b) is a front view of the faucet tip end branch valve.

FIG. 6 is a vertical cross-sectional view of a kitchen sprayer having internal threads according to a fifth embodiment of the present invention.

FIG. 7 is a vertical cross-sectional view of a kitchen sprayer having internal threads according to a sixth embodiment of the present invention.

FIG. 8 is a side view showing a conventional faucet and a water-saving rectifying cap.

[Explanation of symbols]

1 Water-saving rectifying cap 2 Faucet 3 Water outlet 5 Male screw part 6,21,31 Female screw part 5W Wit type male screw part 5M Metric type male screw part 5WT, 5MT, 23T, 33T, 34T Outer diameter 5WP, 5MP, 21P, 22P, 23P , 31P, 3
3P, 34P pitch 5WV, 5MV, 6V, 21V,
23V, 33V, 34V Valley diameter 6T, 21T Inner diameter 5m, 6m, 21m, 22m, 23m Thread 6L, 21L, 31L Length D1, D22, D23 Length of engaging portion in the radial direction 20, 30, 40, 50 , 60 Female screw 22, 23, 33, 34 Male screw 41 Faucet tip branch valve 42, 43 Projection pipe 44 Water passage pipe 45, 51, 61 Detachable part 52, 62 Kitchen spray 53, 63 Main body part

Claims (4)

[Claims] 1. A female screw capable of being screwed into a plurality of types of male screws having different pitches, outer diameters, root diameters, and screw shapes, wherein the root diameter is larger than the maximum outer diameter of the male thread, and the inner diameter is The male thread has a female thread portion within the range of the maximum root diameter and the maximum outer diameter, and the pitch is within the range of the minimum pitch and the maximum pitch of the male thread, and the length of the female thread portion is larger than the minimum pitch and the minimum. A female screw having a pitch smaller than the least common multiple of the maximum pitch. 2. A male screw capable of being screwed into a plurality of types of female screws having different pitches, inner diameters, valley diameters, and screw shapes, the valley diameter being smaller than the minimum inner diameter of the female thread, and the outer diameter being the female thread. Within the range of the minimum inner diameter and the maximum valley diameter, the pitch has a male thread portion within the range of the minimum pitch and the maximum pitch of the female thread, the length of the male thread portion is greater than the minimum pitch and the minimum pitch. A male screw, which is smaller than the least common multiple of the maximum pitch. 3. The internal thread of claim 1, wherein the internal diameter of the internal thread is smaller than the arithmetic mean value of the maximum root diameter and the maximum outer diameter of the external thread. 4. The male screw according to claim 2, wherein the outer diameter of the male screw portion is larger than the arithmetic mean value of the minimum inner diameter and the maximum root diameter of the female screw.