JP2000145982A - Method and structure for attaching flange plate to piping connection portion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and inexpensively attach a flange plate to a piping connection portion. SOLUTION: The outer periphery of a piping connection portion 40 is formed in a shape having long and short radiuses other than a normal circular shape, an opening 10 capable of inserting the piping connection portion 40 into a flange plate 1 and formed in a shape having long and short radiuses, the short radius of the opening 10 is shorter than the long radius of the piping connection portion 40, a groove portion 2 is formed in the outer periphery of the body part of the piping connection portion 40, the opposing side walls of the groove portion 2 are separated from each other facing outward, the thickness of the opening peripheral edge portion of the flange plate 1 is smaller than the groove width of the largest diameter part of the piping connection portion 40 and larger than a distance between the opposing side walls in a depth coincident with the short radius of the opening 10 in the groove portion 2, the piping connection portion 40 is inserted into the opening 10 of the flange plate 1, the flange plate 1 is rotated in relative relation to the piping connection portion 40 while the opening peripheral edge portion of the flange plate 1 faces. the groove portion 2, and the opening peripheral edge portion of the flange plate 1 is pressfitted between the opposing side walls of the groove portion 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of mounting a flange plate to a pipe connection, and more particularly to a method of mounting a flange plate for wall mounting near an open end of a pipe connection provided on a gas plug or a joint. And mounting structure.

[0002]

2. Description of the Related Art A gas plug of a type which is connected to a flexible pipe housed in a wall is provided with an open end of a pipe connecting portion for connecting a flexible pipe of the gas plug body in order to attach the gas plug to the wall. A flange plate is provided in the vicinity. In order to integrally forge the flange plate and the gas stopper body, the forging process increases, and the production takes time and effort.
As shown in FIG. 7, a plurality of screw holes (41) are formed in an end face of a pipe connection part (40) for pipe connection of the gas stopper body (4), and a flange plate (43) separately manufactured is formed in the end face. ) Is screwed so as to project in a direction perpendicular to the axis of the gas stopper main body (4), as shown in FIG.

[0003] The pipe connection portion (4) of such a gas plug body (4).
In the gas plug for connecting a flexible pipe having a flange plate (43) at the open end (40a) of (0), a screw hole (41) is formed at the open end (40a) of the pipe connection part (40). It is necessary to provide space for In gas plugs for connecting iron pipes and pipes that do not require the provision of the flange plate (43), the end face of the pipe connection part is usually forged into a regular hexagon, but the end face of the regular hexagon has a screw hole (41). ) Cannot be obtained with sufficient space. Therefore, the pipe connection portion (4) of the gas plug for connecting the flexible pipe having the flange plate (43) is provided.
7) is forged to an unnecessarily thick thickness so as to have a deformed octagonal end face shape as shown in FIG.

[0004]

In the conventional gas plug for connecting a flexible pipe as described above, a flange plate (43) is screwed to an end face of a pipe connection portion (40) of a gas plug body (4). In order to form the screw hole (41), the cross-sectional shape of the pipe connection part (40) must be formed larger than necessary, such as a deformed octagon, so that the material is wasted. In addition, it must be manufactured separately from a gas plug for iron pipe piping having a pipe connection part having a generally hexagonal cross section, and the screw hole is formed on the end face thereof.
(41) must be formed and the flange plate (43)
It takes time and effort to forge gas plugs of the type having the above, and the production cost is high.

[0005] The present invention provides a method for attaching a separate flange plate projecting in a direction perpendicular to the axis of the pipe connection portion to the pipe connection portion, without screwing a separately provided flange plate to the pipe connection portion. It is an object of the present invention to be able to easily and surely attach. <1>

[0006]

Means for Solving the Problems The solution of the method of the present invention taken to solve the above-mentioned problem is that the outer peripheral shape of the pipe connection portion is a shape having a long radius and a short radius other than a perfect circle. Forming an opening having a shape having a long radius and a short radius through which the pipe connection portion can be inserted into the flange plate, and the short radius of the opening is set shorter than the long radius of the pipe connection portion; A groove is formed on the outer periphery of the trunk of the pipe connection portion, and the opposed side walls of the groove portion are separated from each other outward, and the thickness of the opening peripheral portion of the flange plate is the thickness of the pipe connection portion. The pipe connecting portion is formed to be smaller than a groove width of a maximum diameter portion and larger than a distance between the opposed side walls at a depth corresponding to a short radius of the opening in the groove portion. While inserting The opening edge of the flange plate is opposed to the groove portion, and in the facing state, the flange plate is relatively rotated with respect to the pipe connection portion, so that the opening edge of the flange plate faces the groove portion. And press-fitted between the opposing side walls. "

The above solution works as follows. The outer peripheral shape of the pipe connection portion is forged into a shape having a long radius and a short radius, such as a polygon or an ellipse, other than a perfect circle. Note that, of the distance from the center point of the figure to each vertex and the center of each side, the shorter one is called the shorter radius, and the longer one is called the longer radius. An opening through which the pipe connection portion can be inserted is formed in the flange plate. The shape of the opening also has a long radius and a short radius, and the short radius of the opening is set shorter than the long radius of the pipe connection portion. Accordingly, when the flange plate is relatively rotated in a state of being concentrically combined with the pipe connection portion, the peripheral portion on the shorter radius side of the opening of the flange plate is formed on the longer radius side of the pipe connection portion. Will overlap. For this purpose, for example, a shape in which the shape of the opening and the outer peripheral shape of the pipe connection portion are substantially matched can be adopted, but if the above conditions are satisfied, the outer peripheral shape of the pipe connection portion does not necessarily match the shape of the opening. You don't have to.

In the outer periphery of the trunk portion of the pipe connection portion, a groove is formed by cutting a predetermined range on the long radius side corresponding to a portion where the peripheral portion on the short radius side of the flange plate overlaps by the relative rotation. With this, when the pipe connection portion is inserted into the opening of the flange plate, the peripheral edge of the opening corresponds to the groove portion, and the flange plate is relatively rotated with respect to the pipe connection portion. Of these, the peripheral portion on the short radius side is fitted into the groove.

The groove width at the maximum diameter portion of the pipe connection portion is formed larger than the thickness of the opening peripheral portion of the flange plate, so that the opening peripheral portion is easily fitted into the groove portion. However, the opposed side walls forming the groove are set to have a relationship in which they are separated from each other outward, in other words, a relationship in which the distance between the two becomes smaller toward the inside, and the inside of the groove is set. Since the distance between the opposed side walls at a depth portion corresponding to the short radius of the opening is set smaller than the thickness of the peripheral edge of the opening of the flange plate, the rotation of the flange plate is opposite to the opposing position. Blocked by sidewalls. Then, by forcibly promoting the relative rotation using a tool, the peripheral edge of the opening of the flange plate is press-fitted between the opposing side walls in the groove. The flange plate, whose peripheral edge portion of the opening is once press-fitted into the groove portion, does not inadvertently rotate or fall off.

[0010] The relationship that the opposing side walls of the groove are separated from each other outwardly means that at least one of the opposing side walls constituting the groove is formed of an inclined surface or a tapered surface. If it satisfies the above conditions, it may be constituted by a curved surface.

[0011]

According to the present invention having the above configuration, the following specific effects are obtained. The flange plate can be fitted in the groove of the pipe connection part by simply fitting the flange plate to the groove and rotating it relative to it. Many steps are not required as compared with the method of performing the above.

Even when this is applied to a gas tap, the outer peripheral shape of the pipe connection portion may be any shape having a short radius and a long radius other than a perfect circle, and therefore no flange plate is provided. It can be manufactured to have a plumbing connection with a polygonal outer peripheral surface similar to a type of gas tap. As described above, since the shape of the pipe connection portion can be made common regardless of the use of the gas plug, the trouble of forging each separately can be omitted, and the manufacture becomes easier accordingly. Further, since it is not necessary to form a screw hole at the opening end of the pipe connection portion, it can be manufactured at a low cost and the mounting operation is simple. <Item 2> In the item described in item 1, the "groove portion is formed along an inscribed circle inscribed in an outer peripheral shape of the pipe connection portion, and the size and shape of the opening of the flange plate are the same as that of the pipe. In the case where the outer peripheral shape of the pipe connecting portion is a polygonal shape, a groove portion is formed in a range outside of the inscribed circle in the outer periphery of the trunk portion,
The bottom surface is formed along the inscribed circle.
Also, an opening having the same size and shape as the polygonal shape is formed in the flange plate. When this pipe connection portion is fitted into the opening in a substantially contact state, the opening peripheral edge portion is made to correspond to the groove portion, and both are rotated relative to each other, so that the peripheral edge portion on the short radius side of the opening is on the bottom surface of the groove portion. It is fitted into the groove while rotating along. By making the width of the bottom surface equal to or slightly smaller than the thickness of the peripheral edge of the opening of the flange plate,
The peripheral edge of the opening of the flange plate is press-fitted between the opposed side walls at or near the bottom surface of the groove. In this configuration, the state in which the flange plate is rotated until each vertex of the opening reaches the center of each side of the outer peripheral shape of the pipe connection portion is the most press-fitted state into the groove at the periphery of the opening. Therefore, the degree of press-fitting can be visually confirmed. <Claim 3> Further, in the item of the paragraph 1 or 2, the "fixing for preventing relative rotation between the flange plate and the pipe connection portion in a state where the peripheral edge of the opening of the flange plate is pressed into the groove portion". In this case, the flange plate can be securely fixed in a state where the flange plate is attached to the pipe connection portion.
Incidentally, as the fixing means, a method of fitting a spring pin at a boundary between the pipe connection portion in which the opening peripheral portion of the flange plate is fitted and the peripheral portion of the opening, or a method of pouring and solidifying an adhesive is used. Can be adopted. <Claim 4> In the mounting structure for mounting a flange plate projecting in a direction perpendicular to the axis of the pipe connection portion, the outer shape of the pipe connection portion may be a shape having a long radius and a short radius other than a perfect circle. An opening is formed in the flange plate so that the pipe connection portion can be inserted therethrough and has a long radius and a short radius, and the short radius of the opening is set shorter than the long radius of the pipe connection portion. A groove is formed on the outer periphery of the trunk portion of the connection portion, and the opposed side walls of the groove portion are separated from each other outward, and the thickness of the opening peripheral portion of the flange plate is the maximum of the pipe connection portion. Is set to be smaller than the groove width of the diameter portion and larger than the distance between the opposing side walls at a depth corresponding to the short radius of the opening in the groove portion. ” Let me When the flange plate is relatively rotated with respect to the pipe connection portion in a state where the opening peripheral portion is opposed to the groove portion, the opening peripheral portion is press-fitted between the opposed side walls of the groove portion. As a result, the same operation and effect as those in the above item 1 are obtained. <Item 5> In the item described in item 4, the "groove portion is formed along an inscribed circle inscribed in an outer peripheral shape of the pipe connection portion, and the size and shape of the opening of the flange plate are determined by the pipe size. The shape is substantially matched with the outer peripheral shape of the connecting portion.
The same actions and effects as in the item are generated. <Section 6> In the above item 5, the "outer peripheral shape of the pipe connection portion is a hexagon, and the opposing side walls of the groove portion are tapered surfaces inclined in a direction away from each other outward". The groove is formed outside the hexagonal inscribed circle, and the bottom surface of the groove is formed along the inscribed circle, so that the tapered surfaces face each other via the bottom surface. Will be configured. The shape of the opening of the flange plate is also hexagonal, and the pipe connection portion is inserted into the opening with the hexagon of the opening of the flange plate being in the same posture as the hexagon of the pipe connection portion, and the opening is formed. When the peripheral edge portion is opposed to the groove portion, and the flange plate is rotated by 30 degrees relative to the pipe connection portion,
It is in the maximum press-fit state, and both are engaged at equal intervals at six locations. Therefore, the mounting state of the flange plate is stabilized. <Section 7> In the above paragraphs 4 to 6, "a fixing member for preventing relative rotation between the flange plate and the pipe connection portion in a state where an opening peripheral portion of the flange plate is pressed into the groove portion,
Is further provided at the boundary between the opening and the pipe connection portion ", the same operation and effect as those in the above item 3 are produced.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described together with the illustrated example. FIG. 1 shows an embodiment in which the present invention is applied to a gas stopper. A flange plate (1) is attached to a pipe connection part (40) having a hexagonal outer peripheral surface of a gas stopper body (4) of this embodiment. FIG. 2 is a partially cutaway cross-sectional view showing an inserted state, and FIG. 2 is a right side view of FIG. 1.

The outer periphery of the body near the open end of the pipe connection part (40) of the gas stopper body (4) has the hexagonal corners constituting the outer shape of the pipe connection part (40). It is a mode cut along the inscribed circle. The cut part is the groove (2)
Becomes That is, the bottom of the groove (2) is formed along the inscribed circle, and the opposing side walls forming the groove (2) are mutually outward toward the pipe connection (40) as shown in FIG. And a tapered surface (2a) inclined in a direction away from the main surface.

The flange plate (1) is provided with the pipe connection portion.
A hexagonal opening (10) is formed in a size that can just fit the (40). The flange plate (1) is smaller than the distance between the open edges of the tapered surface (2a) of the groove (2) and the groove
(2) is formed in the shape of a disk having a thickness greater than the width of the bottom portion, and at a position symmetrical with respect to the opening (10), a bolt insertion hole through which a fixing bolt described later is inserted. (11
a) (11b) is formed.

The above flange plate (1) is connected to the pipe connection part (40).
As shown in FIG. 2, the pipe connection (40)
To the shape of the opening (10) in the flange plate (1).
Insert the pipe connection part (40) through (10), and as shown in FIG.
The opening (10) faces the groove (2). In this state, for example, place the flange plate (1) in the direction of the arrow in FIG.
Rotate relative to (40).

With the rotation, the opening of the flange plate (1) is opened.
The central part (12) of each side constituting (10) moves in the direction of the arrow along the bottom of the groove (2) corresponding to the inscribed circle of the pipe connection part (40). The distance of the open end of the groove (2) is
As described above, since the thickness is set to be larger than the thickness of the flange plate (1), the periphery of the opening (10) fits smoothly into the groove (2), but the opposite side wall of the groove (2) Is a tapered surface
(2a) and the bottom width is smaller than the thickness of the flange plate (1).
The movement of the center (12) of each side constituting the opening (10) of (1) is prevented by the opposed tapered surface (2a) near the bottom of the groove (2). Therefore, the tool is forcibly rotated using a tool or the like. Thus, the center (12) of each side constituting the opening (10) moves along the bottom while being press-fitted between the tapered surfaces (2a).

In this embodiment, since the opening (10) and the pipe connection part (40) are each formed in a hexagonal shape, FIG.
As shown in the figure, the state where the flange plate (1) is rotated by 30 degrees with respect to the pipe connection part (40) is the groove portion of the flange plate (1).
It will be in the maximum press-fit state to (2). In this state, the aperture
The center part (12) of each side of (10) is located at the center of each groove part (2), and the surrounding area is press-fitted between the tapered surfaces (2a). This state is a state in which the flange plate (1) is attached to the pipe connection part (40) in a detent state and a retaining state.

As described above, the gas plug main body (4) of the type in which the separate flange plate (1) is attached to the pipe connection part (40) is
The mounting method for mounting via the opening (30) formed in the wall (3) will be described with reference to FIG. First, the flange plate
The fixing bolts (31a) and (31b) were inserted into the bolt insertion holes (11a) and (11b) formed in (1), and the fixing bolts (31a) and (31b) were provided on a substantially U-shaped or horseshoe-shaped backing plate (21). Screw into the screw holes (21a) (21b). Then, the backing plate (21) is passed from the opening (30) to the back side of the wall (3), is attached to the vicinity of the periphery of the opening (30), and the fixing bolts (31a) (31b) are tightened. This allows the opening (30)
The peripheral wall (3) is pressed from both sides by the backing plate (21) and the flange plate (1).
However, the backing plate (21) is attached and fixed to the interior side of the wall (3) on the back side of the wall (3).

Then, the terminal portion of the pipe (32) is pulled out into the room from the opening (30) in which a part of the backing plate (21) and the flange plate (1) are protruded, and a joint (33) is connected thereto. To connect to the pipe connection (40) of the gas tap body (4). A flange plate (1) attached and fixed to the indoor side peripheral portion of the opening (30) has a hexagonal opening (10) having a size substantially matching the piping connection portion (40) of the gas stopper body (4). ) Is formed, so the pipe connection (4
Orientation (0) is adjusted to the shape of the opening (10), the pipe connection part (40) is inserted through the opening (10), and the flange plate is inserted into the groove (2) formed in the pipe connection part (40). When the opening (10) of (1) faces, the gas stopper main body (4) is turned 30 degrees by a tool. Then, as shown in FIG. 3, the area near the center (12) of each side of the opening (10) of the flange plate (1) is
The pipe connecting portion (40) of the gas plug body (4) is attached to the flange plate (1) in a state where it is prevented from rotating and is prevented from being pulled out while being forcibly pressed into the inside of (2).

Thus, the gas stopper main body (4) is mounted on the wall (3) via the flange plate (1).
As described above, the pipe connection part (40) of the gas stopper body (4)
Is inserted into the opening (10) of the flange plate (1) and rotated 30 degrees is the mounting posture to the wall (3), so when the pipe connection part (40) is rotated 30 degrees , Gas stopper body
In order for the outlet plug of (4) to be oriented in the desired direction, insert the pipe connection part (40) into the opening (10) of the flange plate (1), that is, the opening (10) of the flange plate (1). The flange plate (1) is attached to the wall (3) in consideration of the direction of).

In this state, the opening of the flange plate (1) is
As shown in FIGS. 3 and 5, a gap (S) formed between each apex portion of (10) and the outer peripheral surface of the pipe connection portion (40),
By inserting the spring pin (P), the flange plate
The relative rotation between (1) and the pipe connection part (40) is prevented, so that the connection of the pipe connection part (40) to the opening (10) of the flange plate (1) becomes more reliable. Flange plate (1) and piping connection
As another fixing means for preventing the relative rotation with (40), an adhesive, a nut or the like can be adopted. When a nut is used, a screw is cut at each top of the pipe connection part (40), and the nut is screwed into the pipe connection part (40) so as to make frictional contact with the flange plate (1). .

A decorative plate (not shown) for covering the entire upper surface of the flange plate (1) is provided on the indoor side of the flange plate (1), so that it can be connected to the outer peripheral surface of the pipe connection part (40). The gap between the openings (10) formed therebetween, and the fixing members such as the adhesive and the pins are not exposed to the indoor side. In the above embodiment, the outer peripheral shape of the pipe connection part (40) of the gas plug body (4) is made hexagonal similarly to the pipe connection part (40) of a normal gas plug, and the opening ( The shape of 10) was also the same hexagonal shape,
The flange plate (1) and the pipe connection part (40) are relatively rotated, such as a polygon or an ellipse, where the distance from the center to each vertex and the distance to the center of each side has a length. Any shape may be used as long as the overlapping portions are formed when moved.
To put it the other way around, even if the flange plate (1) and the pipe connection part (40) are relatively rotated, a dimensional relationship or a round shape that does not cause overlapping parts to be formed cannot be adopted.

If the pipe connecting portion (40) can be inserted into the opening (10) and a part of the flange plate (1) can be fitted into the groove (2) by the relative rotation, the pipe The shape of the opening (10) of the connecting portion (40) and the flange plate (1) does not need to match. Further, the groove (2) formed in the pipe connection part (40) may be formed along the outer peripheral surface of the pipe connection part (40) as shown in FIG. In this case, the opposed side wall of the groove (2) is not a tapered surface but an inclined surface formed for each side of the hexagon.

The surface forming the opposite side wall of the groove (2) is
At least one surface may be a tapered surface or an inclined surface, and may be a curved surface.

[Brief description of the drawings]

FIG. 1 is a partially cutaway sectional view showing a state in which a flange plate is inserted into a pipe connection portion of a gas stopper main body according to an embodiment of the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a sectional view showing a state in which a flange plate is relatively rotated with respect to a pipe connection portion.

FIG. 4 is an explanatory view showing a state in which the gas stopper main body is attached to a wall via a flange plate and a backing plate.

FIG. 5 is a sectional view taken along line XX of FIG. 3;

FIG. 6 is an explanatory view of another example of the groove formed in the pipe connection part.

FIG. 7 is an explanatory view of a conventional gas stopper of a type having a flange plate.

FIG. 8 is an explanatory view showing a state in which a flange plate is screwed to the gas stopper of FIG. 6;

[Explanation of symbols]

 (1) ... Flange plate (1a) ... Near both ends (10) ... Opening (2) ... Groove (2a) ... Opposite side wall (tapered surface) (20) ... Transparent Holes The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (7)

[Claims] 1. A mounting method for mounting a flange plate projecting in a direction perpendicular to an axis of a pipe connecting portion, wherein an outer peripheral shape of the pipe connecting portion is formed into a shape having a long radius and a short radius other than a perfect circle. An opening having a long radius and a short radius is formed in the flange plate so that the pipe connection portion can be inserted therein, and the short radius of the opening is set shorter than the long radius of the pipe connection portion; A groove is formed on the outer periphery of the body of the connection portion, and the opposed side walls of the groove are separated from each other outward. The thickness of the opening peripheral portion of the flange plate is the maximum diameter of the pipe connection portion. The groove is formed to be smaller than the groove width of the portion and larger than the distance between the opposed side walls at a depth corresponding to the short radius of the opening in the groove, and the pipe connection portion is inserted into the opening of the flange plate. When Both, the opening edge of the flange plate is opposed to the groove portion, and in the facing state, the flange plate is relatively rotated with respect to the pipe connection portion, and the opening edge of the flange plate is A method of attaching a flange plate to a pipe connection portion, wherein the flange plate is press-fitted between the opposed side walls of the groove. 2. The groove portion is formed along an inscribed circle inscribed in an outer peripheral shape of the pipe connection portion, and a size and a shape of the opening of the flange plate are substantially equal to an outer peripheral shape of the pipe connection portion. The method for attaching a flange plate to a pipe connection part according to claim 1, which is matched. 3. A fixing means for preventing relative rotation between the flange plate and the pipe connection portion in a state where an opening edge of the flange plate is pressed into the groove.
Or the method of attaching a flange plate to the pipe connection part according to 2. 4. A mounting structure for mounting a flange plate projecting in a direction perpendicular to an axis of a pipe connecting portion, wherein an outer peripheral shape of the pipe connecting portion is a shape having a long radius and a short radius other than a perfect circle. An opening is formed in the flange plate so that the pipe connection portion can be inserted therein and has a long radius and a short radius. The short radius of the opening is set shorter than the long radius of the pipe connection portion. A groove is formed on the outer periphery of the trunk portion of the connection portion, and the opposed side walls of the groove portion are separated from each other outward, and the thickness of the opening peripheral portion of the flange plate is the maximum of the pipe connection portion. A flange plate attached to a pipe connection portion, wherein the flange plate is set to be smaller than a groove width of a diameter portion and larger than a distance between the opposed side walls at a depth corresponding to a short radius of the opening in the groove portion. Structure . 5. The groove portion is formed along an inscribed circle inscribed in an outer peripheral shape of the pipe connection portion, and a size and a shape of the opening of the flange plate correspond to the outer peripheral shape of the pipe connection portion. The mounting structure of the flange plate to the pipe connection part according to claim 4, which is substantially matched. 6. The pipe according to claim 5, wherein an outer peripheral shape of a cross section of the pipe connection part is hexagonal, and the opposed side wall of the groove part is a tapered surface inclined in a direction away from each other outward. Mounting structure of the flange plate to the connection. 7. A fixing member for preventing relative rotation between the flange plate and the pipe connection portion in a state where an opening edge portion of the flange plate is pressed into the groove portion, the fixing member being provided between the opening and the pipe connection portion. The structure for mounting a flange plate to a pipe connection part according to any one of claims 4 to 6, further provided at a boundary of (1).