JP6971121B2 - Joint holding member and joint holding structure - Google Patents

Description

The present invention relates to a joint holding member and a joint holding structure.

Conventionally, pipes made of cross-linked polyethylene, polybutene, or the like have been used in the living rooms of apartment houses such as detached houses and condominiums. As a kind of joint for connecting this pipe, a joint having an outer surface waterproof structure (method) is used.
In a joint having a water-stopping structure on the outer surface, an in-core (inner cylinder) configured separately from the joint body is used. The in-core reinforces the connection portion between the joint body and the pipe from the inner surface side of the joint body. By using the in-core, the adhesion between the joint body and the pipe can be maintained for a long period of time.

When packing a joint with a waterproof structure on the outer surface, the in-core is stored inside the joint body. When packed in this way, at the construction site, when the operator connects the pipe and the joint having the external waterproof structure, he / she obtains the in-core inside the joint body. Since the in-core is installed in the joint body to perform the construction work, it is possible to prevent the in-core from being forgotten to be installed in the joint body.

For example, in the joint of Patent Document 1, when the in-core is not connected to the pipe and is not used, the in-core is housed in the pipe connection port of the joint body. The end of the in-core is in contact with the contact surface in the joint body so that the in-core does not go deep into the joint body. The contact surface protrudes inward in the radial direction from the inner peripheral surface of the joint body.

Japanese Unexamined Patent Publication No. 2000-170975

However, in the joint of Patent Document 1, since the contact surface is provided in the joint body, the contact surface is provided in the joint body in the cross-sectional area of the flow path through which a fluid such as tap water flows in the joint body. It is smaller than when it is not. When the cross-sectional area of the flow path of the joint body becomes small, it becomes difficult for fluid to flow in the joint body.

The present invention has been made in view of such problems, and is a joint that can suppress the inner cylinder from entering the joint body and can secure a large flow path cross-sectional area of the joint body. It is an object of the present invention to provide a holding member and a joint holding structure including the joint holding member.

In order to solve the above problems, the present invention proposes the following means.
The joint holding member of the present invention is a joint holding member used for holding a tubular joint body in a joint connected to a pipe and an inner cylinder arranged in the joint body. A tubular portion that fits between the joint body and the inner tubular body, a flange portion that protrudes radially outward from the tubular portion, and a knob that protrudes from the radial outer edge portion of the flange portion. , A first protrusion provided on the knob and fitted into the inner cylinder .

According to the present invention, for example, the inner tubular body is inserted into the tubular portion of the joint holding member, and the tubular portion of the joint holding member is further inserted into the joint main body. In this way, the inner cylinder is held in the joint body via the joint holding member. Since the outer diameter of the flange is larger than the inner diameter of the joint body, the flange does not enter the joint body.
Further, since the flange portion does not enter the joint main body, it is not necessary to provide a contact surface in the joint main body as in Patent Document 1, and a large flow path cross-sectional area of the joint main body can be secured.
Further, the operator can easily remove the joint holding member from the joint body and the inner cylinder by grasping and operating the knob. Further, the position of the joint holding member can be easily visually recognized by the operator.
Further, when the knob is folded and the first protrusion is fitted inside the inner cylinder, the first protrusion is arranged inside the inner cylinder. As a result, it is possible to prevent dust and the like from entering the inner cylinder at the construction site and the like.

Further, in the above-mentioned joint holding member, a groove portion may be formed on at least one of the outer peripheral surface and the inner peripheral surface of the tubular portion.
According to the present invention, the rigidity of the tubular portion is lowered and the tubular portion is easily deformed. Therefore, the tubular portion can be easily fitted to the joint body and the inner cylinder, and the tubular portion can be easily removed from the joint body and the inner cylinder.

Further, in the above-mentioned joint holding member, a through hole extending from the outer peripheral surface to the inner peripheral surface of the tubular portion may be formed.
According to the present invention, since the rigidity of the tubular portion is further lowered, it is easier to fit the tubular portion to the joint body and the inner cylinder, and it is easier to remove the tubular portion from the joint body and the inner cylinder. Can be done.

Further, in the above-mentioned joint holding member, a plurality of the groove portions may be formed side by side, and a notch may be formed in a second protrusion formed between the plurality of groove portions.
According to the present invention, the notch makes it possible to reduce the rigidity of the second protrusion and make the second protrusion easier to bend. This makes it easier to fit the tubular portion to the joint body and the inner cylinder, and makes it easier to remove the tubular portion from the joint body and the inner cylinder.

Further, the joint holding structure of the present invention is characterized by including the joint holding member according to any one of the above and the joint.
According to the present invention, the joint holding structure is configured by using a joint holding member that can suppress the inner cylinder from entering the joint body and secure a large flow path cross-sectional area of the joint body. Can be done.

According to the joint holding member and the joint holding structure of the present invention, it is possible to suppress the inner cylinder from entering the joint main body and secure a large flow path cross-sectional area of the joint main body.

It is sectional drawing which made the side view the main part of the joint holding structure of 1st Embodiment of this invention. It is a perspective view of the joint holding member in the joint holding structure. It is a perspective view of the joint holding member in the modification of embodiment of this invention. It is a perspective view of the joint holding member in the modification of embodiment of this invention. It is sectional drawing of the cutting line A1-A1 in FIG. It is a perspective view of the joint holding member in the modification of embodiment of this invention. It is a perspective view of the joint holding member in the modification of embodiment of this invention. It is sectional drawing of the cutting line A2-A2 in FIG. 7. It is a perspective view of the joint holding member in the modification of embodiment of this invention. It is a perspective view of the joint holding member in the modification of embodiment of this invention. It is a perspective view of the joint holding member in 2nd Embodiment of this invention. It is sectional drawing which made the side view the main part of the joint holding structure provided with the said joint holding member.

(First Embodiment)
Hereinafter, the first embodiment of the joint holding structure according to the present invention will be described with reference to FIGS. 1 to 10.
As shown in FIGS. 1 and 2, the joint holding structure 1 of the present embodiment includes a joint 11 and a joint holding member 21 of the present embodiment. The joint 11 is a joint having an outer surface waterproof structure connected to the pipe P. In FIG. 1, the pipe P is shown by a two-dot chain line in order to mainly explain the joint holding structure 1.
The joint 11 has a joint main body 12 and an in-core (inner cylinder) 13. The joint holding member 21 is used to hold the joint body 12 and the in-core 13. The joint holding member 21 has a tubular portion 22 and a flange portion 23.

Here, the joint body 12, the in-core 13, and the tubular portion 22 are formed in a cylindrical shape, and the flange portion 23 is formed in an annular shape. The central axes of the joint body 12, the in-core 13, the tubular portion 22, and the flange portion 23 are arranged coaxially with the common axis. Hereinafter, the common axis is referred to as an axis C. The axis C is the central axis of the joint body 12, the tubular portion 22, and the like. The direction along the axis C is called the axis C direction. The direction orthogonal to the axis C is called the radial direction, and the direction orbiting around the axis C is called the circumferential direction.

The in-core 13 has a body portion 15 and a flange 16. The body portion 15 is formed in a cylindrical shape. The flange 16 is provided at the end of the body portion 15 in the axis C direction so as to project outward in the radial direction.
When the in-core 13 of the joint 11 is held by the joint holding member 21, a part of the body portion 15 is arranged inside the joint main body 12, and the flange 16 is arranged outside the joint main body 12.
On the other hand, when the joint 11 is used because the pipe P is connected to the joint 11, the flange 16 of the in-core 13 is joined by the flange 16 rather than the body 15 as shown by the two-dot chain line L1 in FIG. It is arranged on the central portion side of the main body 12 in the axis C direction. The pipe P is connected to the joint body 12 by sandwiching the pipe P between the inner peripheral surface of the joint body 12 and the outer peripheral surface of the body portion 15 and fixing the in-core 13 to the joint body 12 by a fixing means (not shown). ing.

As shown in FIGS. 1 and 2, the tubular portion 22 has an inner diameter equivalent to the outer diameter of the body portion 15 of the incore 13. Here, A (for example, the inner diameter of the tubular portion 22) and B (for example, the outer diameter of the body portion 15) are equivalent, for example, A and B are equal to each other, or the dimensions of A and B are equal. It means that the difference is within a few mm.
The tubular portion 22 has an outer diameter equivalent to the inner diameter of the joint body 12. The tubular portion 22 is formed with a plurality of through holes 25 extending from the outer peripheral surface of the tubular portion 22 to the inner peripheral surface. In the tubular portion 22, a shaft-shaped member 26 is formed between the through holes 25 adjacent to each other in the circumferential direction.

The plurality of through holes 25 are formed over the entire length of the tubular portion 22 in the axis C direction. Each axial member 26 is formed in a triangular columnar shape and extends in the axis C direction. Each axial member 26 is arranged so that the side surface 26a, which is one of the three side surfaces of the axial member 26, faces the axis C, and the side 26b opposite to the side surface 26a faces outward in the radial direction. There is. In this example, the tubular portion 22 has four shaft-shaped members 26. The plurality of axial members 26 are formed at equal angles around the axis C at intervals from each other.
The plurality of axial members 26 may be tilted toward the axis C as they are separated from the flange portion 23 along the axis C direction.
The number of the shaft-shaped members 26 included in the tubular portion 22 is not particularly limited, and may be two, three, or five or more. Although it is said that the shaft-shaped member 26 is formed in a triangular columnar shape, the shape of the shaft-shaped member is not particularly limited. The shaft-shaped member may have a concentric shape, an inclined plate shape such as an exhaust duct in a kitchen, a blade shape of a centrifugal pump, or the like.

The flange portion 23 is provided at the end of the tubular portion 22 in the axis C direction so as to project outward in the radial direction. The outer diameter of the flange portion 23 is larger than the inner diameter of the joint body 12. The outer diameter of the flange portion 23 and the outer diameter of the joint body 12 are equivalent to each other.
The shaft-shaped member 26 (cylindrical portion 22) and the flange portion 23 constituting the joint holding member 21 are integrally formed of a flexible material. There is no limitation on the material forming the shaft-shaped member 26 and the flange portion 23. For example, a resin material such as polypropylene, polyethylene or polybutene, a metal material such as aluminum, copper or iron, or a composite material thereof or the like is used.

Next, a procedure for forming the joint holding structure 1 by including the joint main body 12 and the in-core 13 of the joint 11 by using the joint holding member 21 configured as described above will be described. Hereinafter, the procedure using the joint holding member 21 will be mainly described.
The operator inserts the body portion 15 of the in-core 13 from the flange portion 23 side into the tubular portion 22 of the joint holding member 21. The flange 16 of the in-core 13 is brought into contact with the tubular portion 22 of the joint holding member 21. Further, the tubular portion 22 of the joint holding member 21 is inserted into the joint body 12. The flange portion 23 of the joint holding member 21 is brought into contact with the end surface of the joint body 12 in the axis C direction.

Since the outer diameter of the tubular portion 22 and the inner diameter of the joint body 12 are equal to each other, and the inner diameter of the tubular portion 22 and the outer diameter of the body portion 15 of the incore 13 are equal to each other, the joint main body 12 and the cylinder are equal to each other. The in-core 13 is held in the joint body 12 via the joint holding member 21 by the frictional force acting between the shaped portion 22, the tubular portion 22, and the body portion 15 of the in-core 13. The joint holding structure 1 is composed of the joint main body 12 and the in-core 13 held in the joint main body 12 via the joint holding member 21.
Since the through hole 25 is formed on the outer peripheral surface of the tubular portion 22, the rigidity of the tubular portion 22 is lowered and the tubular portion 22 is easily deformed. Therefore, it becomes easy to fit the tubular portion 22 to the joint main body 12 and the in-core 13, and it becomes easy to remove the tubular portion 22 from the joint main body 12 and the in-core 13.
The joint holding structure 1 is appropriately housed in a packing bag or a packing box to pack the joint 11.

As described above, according to the joint holding member 21 of the present embodiment, the in-core 13 is inserted into the tubular portion 22 of the joint holding member 21, and the tubular portion 22 of the joint holding member 21 is further inserted into the joint main body 12. To insert. In this way, the in-core 13 is held in the joint body 12 via the joint holding member 21. Since the outer diameter of the flange portion 23 is larger than the inner diameter of the joint main body 12, the flange portion 23 does not enter the joint main body 12.
Since the flange portion 23 does not enter the joint body 12, it is not necessary to provide a contact surface in the joint body as in Patent Document 1, and a large flow path cross-sectional area of the joint body 12 can be secured. ..

Since a plurality of through holes 25 are formed on the outer peripheral surface of the tubular portion 22, the rigidity of the tubular portion 22 is further lowered, and the tubular portion 22 is more easily deformed. Therefore, the tubular portion 22 can be more easily fitted to the joint main body 12 and the in-core 13, and the tubular portion 22 can be further easily removed from the joint main body 12 and the in-core 13.
Further, according to the joint holding structure 1 of the present embodiment, the joint holding member 21 that can suppress the in-core 13 from entering the joint main body 12 and secure a large flow path cross-sectional area of the joint main body 12 is provided. The joint holding structure 1 can be configured by using the joint holding structure 1.

The structure of the joint holding member 21 of the present embodiment can be variously modified as described below.
As in the joint holding member 31 shown in FIG. 3, in the joint holding member 21, a plurality of groove portions 32 may be formed in the tubular portion 22 instead of the plurality of through holes 25. The plurality of groove portions 32 are formed on the inner peripheral surface of the tubular portion 22 so as to extend in the axis C direction and are spaced apart from each other in the circumferential direction. A second protrusion 33 is formed between the groove portions 32 adjacent to each other in the circumferential direction.

According to the joint holding member 31 of this modification, since a plurality of groove portions 32 are formed on the inner peripheral surface of the tubular portion 22, the rigidity of the tubular portion 22 is lowered and the tubular portion 22 is easily deformed. .. Therefore, the tubular portion 22 can be easily fitted to the joint main body 12 and the in-core 13, and the tubular portion 22 can be easily removed from the joint main body 12 and the in-core 13.
Since the plurality of groove portions 32 extend in the axis C direction, the cylindrical portion 22 and the incore 13 come into contact with each other only at the second protrusion 33. Therefore, the tubular portion 22 can be more easily fitted to the in-core 13, and the tubular portion 22 can be further easily removed from the in-core 13.

As in the joint holding member 36 shown in FIGS. 4 and 5, in the joint holding member 21, a plurality of groove portions 37 may be formed in the tubular portion 22 instead of the plurality of through holes 25. The plurality of groove portions 37 are formed in a ring shape extending in the circumferential direction on the outer peripheral surface of the tubular portion 22. The plurality of groove portions 37 are formed so as to be spaced apart from each other in the axis C direction.
As in the joint holding member 41 shown in FIG. 6, in the joint holding member 21, a plurality of groove portions 42 may be formed in the tubular portion 22 instead of the plurality of through holes 25. The plurality of groove portions 42 are formed in a spiral shape about the axis C as an axis.
The plurality of groove portions 42 may be formed in a spline shape (smooth curved shape).

As in the joint holding member 46 shown in FIGS. 7 and 8, in the joint holding member 21, a plurality of groove portions 47 and 48 may be formed in the tubular portion 22 instead of the plurality of through holes 25.
The plurality of groove portions 47 are formed in a ring shape extending in the circumferential direction on the outer peripheral surface of the tubular portion 22. The plurality of groove portions 47 are formed so as to be spaced apart from each other in the axis C direction. The plurality of groove portions 48 are formed in a ring shape extending in the circumferential direction on the inner peripheral surface of the tubular portion 22. The plurality of groove portions 48 are formed so as to be spaced apart from each other in the axis C direction. The plurality of groove portions 47 and 48 are arranged alternately in the axis C direction. The tubular portion 22 in which the plurality of groove portions 47 and 48 are formed is wavy.
The shapes of the groove portion and the tubular portion may be determined so as to form a composite shape of the above-mentioned plurality of spiral or spline-shaped groove portions and the corrugated tubular portion 22 in combination.

As in the joint holding member 51 shown in FIG. 9, in the joint holding member 21, a plurality of groove portions 52 may be formed in the tubular portion 22 instead of the plurality of through holes 25. The plurality of groove portions 52 are formed on the outer peripheral surface of the tubular portion 22 so as to extend in the axis C direction. The plurality of groove portions 52 are formed side by side at intervals in the circumferential direction. A second protrusion 53 is formed between the groove portions 52 adjacent to each other in the circumferential direction. The second protrusion 53 extends over the entire length of the tubular portion 22 in the axis C direction. A plurality of second protrusions 53 are formed by the plurality of groove portions 52. The plurality of second protrusions 53 are in the shape of heat radiation fins.
A notch 53a is formed on the side surface of the second protrusion 53 facing the circumferential direction. The notch 53a is formed in a radial intermediate portion on this side surface, and is formed so as to extend in the axis C direction over the entire length of the second protrusion 53.

Even if the joint holding members 36, 41, 46, 51 are configured in this way, the same effect as that of the joint holding member 21 of the present embodiment can be obtained.
Further, since the notch 53a is formed in the second protrusion 53 in the joint holding member 51, the second protrusion 53 is deformed in the radial direction when a radial compressive force acts on the second protrusion 53. It's easy to do. Therefore, the tubular portion 22 can be more easily fitted to the joint main body 12, and the tubular portion 22 can be further easily removed from the joint main body 12. Due to the shape of the notch 53a, the repulsive force of the second protrusion 53 that has received the compressive force can be adjusted.

The number of groove portions 32, 37, 42, 47, 48, 52 formed in the joint holding members 31, 36, 41, 46, 51 is not particularly limited, and may be one.

As in the joint holding member 56 shown in FIG. 10, a third protrusion 57 may be provided in addition to each configuration of the joint holding member 21. In this modification, the third protrusion 57 is formed in a cylindrical shape and protrudes along the axis C direction from the radial outer end of the flange portion 23. The third protrusion 57 projects from the flange portion 23 so as to face the outer peripheral surface of the tubular portion 22. That is, the third protrusion 57 projects from the flange portion 23 toward the tubular portion 22 with respect to the flange portion 23.
According to the joint holding member 56 of this modification, the rigidity of the flange portion 23 can be increased by the third protrusion 57.
Since the third protrusion 57 covers the radial outer surface of the joint body 12, it is possible to prevent the third protrusion 57 from being caught by another member and the joint holding member 56 from being disengaged from the joint body 12. ..
The third protrusion may be formed in a part of the circumferential direction at the radial outer end of the flange portion 23. The third protrusion may protrude from the radial intermediate portion of the flange portion 23.

(Second Embodiment)
Next, the second embodiment of the present invention will be described with reference to FIGS. 11 and 12, but the same parts as those in the embodiment are designated by the same reference numerals and the description thereof will be omitted, and only the differences will be described. explain.
As shown in FIG. 11, the joint holding member 61 of the present embodiment includes one tab (pinching) 62 and a first protrusion 63 in addition to each configuration of the joint holding member 21.
The tab 62 is formed in a flat plate shape and protrudes radially outward from the radially outer edge portion of the flange portion 23. In this example, the tab 62 projects radially outward from a portion of the peripheral edge of the flange 23. The outer surface of the flange portion 23 opposite to the tubular portion 22 and the outer surface of the tab 62 are flush with each other. It is preferable that the thickness of the tab 62 is thin because the tab 62 can be easily folded.

The width of the tab 62 is equal to or larger than the inner diameter of the flange portion 23. The radial length L3 of the tab 62 is longer than the radial length L4 from the inner peripheral surface to the outer peripheral surface of the flange portion 23 in the radial direction.
The first protrusion 63 is formed in a columnar shape, for example, and is provided at the radial outer end of the tab 62. The first protrusion 63 is arranged on the side opposite to the tubular portion 22 with respect to the tab 62.
As shown in FIG. 12, the outer diameter of the first protrusion 63 and the inner diameter of the body portion 15 of the incore 13 are equivalent to each other. That is, the first protrusion 63 can be fitted into the body portion 15 of the incore 13.
For example, the tab 62 and the first protrusion 63 are made of the same material as the shaft-shaped member 26 and the flange portion 23, and are integrally formed with the shaft-shaped member 26 and the flange portion 23.

Next, a procedure for forming the joint holding structure 2 including the joint holding member 61 and the above-mentioned joint 11 will be described. Hereinafter, the procedure using the joint holding member 61 will be mainly described.
In advance, the tab 62 projects radially outward from the flange portion 23, as shown by the alternate long and short dash line in FIG.
The operator inserts the body portion 15 of the in-core 13 from the flange portion 23 side into the tubular portion 22 of the joint holding member 61. Further, the tubular portion 22 of the joint holding member 61 is inserted into the joint body 12. The tab 62 is folded and the first protrusion 63 is fitted into the body 15 of the incore 13. In this way, with the first protrusion 63 arranged in the in-core 13, the in-core 13 is held in the joint body 12 via the joint holding member 61.

In order to remove the joint holding member 61 from the joint body 12 and the in-core 13, for example, the operator grips the tab 62 and removes the first protrusion 63 from the in-core 13. By grasping the tab 62, the tubular portion 22 is removed from the joint body 12, and the tubular portion 22 is removed from the in-core 13.

For example, when a prefabricated unit is made in advance in a factory or a waterworks shop, the joint body 12 and the incore 13 are taken out from the packing box, but it is conceivable that the prefabricated unit is left for a while without being connected to the pipe P.
In such a case, there is no problem if the opening of the joint body 12 is cured (closed) on site with tape or the like. However, in order to reduce the labor during construction, the tab 62 can be folded to cover the in-core 13 as needed.

As described above, according to the joint holding member 61 and the joint holding structure 2 of the present embodiment, the in-core 13 is suppressed from entering the joint main body 12, and the flow path cross-sectional area of the joint main body 12 is largely secured. can do.
Further, the joint holding member 61 includes a tab 62. By gripping and operating the tab 62, the operator can easily remove the joint holding member 61 from the joint body 12 and the incore 13. Further, the position of the joint holding member 61 can be easily visually recognized by the operator.
A first protrusion 63 is provided at the end of the tab 62. When the tab 62 is folded and the first protrusion 63 is fitted in the in-core 13, the first protrusion 63 is arranged in the in-core 13. As a result, it is possible to prevent dust and the like from entering the in-core 13 at the construction site and the like.

In the present embodiment, the joint holding member 61 is provided with one tab 62, but the joint holding member 61 may be provided with two or more tabs 62.
The tab 62 may be provided with an engaging portion instead of the first protrusion 63, and the tubular portion 22 may be provided with a detachable engaged portion in the engaging portion. Then, the inside of the in-core 13 may be closed by attaching the engaging portion and the engaged portion. Even with such a configuration, the same effect as that of the joint holding member 61 of the present embodiment can be obtained.
The tab 62 may not be provided with the first protrusion 63.

Although the first embodiment and the second embodiment of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and the configuration does not deviate from the gist of the present invention. Changes, combinations, deletions, etc. of are also included. Further, it goes without saying that each of the configurations shown in each embodiment can be used in combination as appropriate.
For example, in the first embodiment and the second embodiment, the tubular portion 22 does not have to have a through hole or a groove.

Although it is assumed that the body portion 15 of the joint body 12 and the incore 13 is formed in a cylindrical shape, the shapes of the joint body 12 and the body portion 15 are not limited to this. The joint body 12 and the body portion 15 may have, for example, a cylindrical shape having an elliptical shape, a polygonal shape, or the like in a cross section orthogonal to the axis.

1, 2 Fitting holding structure 11 Fitting 12 Fitting body 13 Incore (inner cylinder)
21,31,36,41,46,51,56,61 Joint holding member 22 Cylindrical part 23 Flange part 25 Through hole 32,37,42,47,48,52 Groove part 53 Second protrusion 53a Notch 62 Tab (Picking)
63 1st protrusion C axis L4 length P pipe

Claims (5)

A joint holding member used to hold a tubular joint body in a joint connected to a pipe and an inner cylinder arranged in the joint body.
A tubular portion that fits between the joint body and the inner cylinder,
A flange portion that protrudes radially outward from the tubular portion, and a flange portion that protrudes outward in the radial direction.
A knob protruding from the radial outer edge of the collar,
The first protrusion provided on the knob and fitted into the inner cylinder,
A joint holding member comprising. The joint holding member according to claim 1 , wherein a groove is formed on at least one of an outer peripheral surface and an inner peripheral surface of the tubular portion. The joint holding member according to claim 1 or 2 , wherein a through hole extending from the outer peripheral surface to the inner peripheral surface of the tubular portion is formed. A plurality of the grooves are formed side by side.
The joint holding member according to claim 2 , wherein a notch is formed in a second protrusion formed between the plurality of grooves. The joint holding member according to any one of claims 1 to 4, and the joint holding member.
With the joint
Fitting holding structure.

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