JP3385151B2 - Pipe fittings - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a pipe joint used for a sewer pipe or a drain pipe.

[0002]

2. Description of the Related Art Conventionally, as one of pipe fittings used for sewer pipes and drainage pipes, at least one end of a joint body is provided with a receptacle having a larger diameter than the joint body. There is a structure in which a rubber ring that seals between the insertion tube inserted into the receiving port and the receiving port is provided at a position near the opening end of the inner peripheral surface. Conventionally, in this type of pipe joint, the axial length of the receiving port is equal to or smaller than the diameter of the receiving port.

[0003]

However, in such a conventional pipe joint, the insertion allowance of the insertion tube to be inserted into the receiving opening is at most about the same as the diameter of the receiving opening, and in some cases, less than or equal to the diameter of the receiving opening. However, there was a problem that the insertion tube could easily come off the receptacle due to vibrations such as an earthquake because it was the actual situation. Also, if the insertion tube is inserted to the maximum extent in the receiving port, the movement of the insertion tube cannot be permitted when a load in the insertion direction is applied to the insertion tube, so that the insertion tube or the pipe joint is easily damaged. There was also.

In view of the above problems, it is an object of the present invention to provide a pipe joint in which the pipe is unlikely to come off or be damaged by vibration such as an earthquake.

[0005]

In order to achieve the above object, in the pipe joint according to claim 1 of the present invention, at least one end of the joint body is provided with a receptacle having a diameter larger than that of the joint body. At a position in the vicinity of the open end of the inner peripheral surface of, a pipe joint provided with a rubber ring for sealing between the insertion pipe to be inserted into the receiving port and the receiving port,
The axial length from the rubber ring to the back of the receiving port is equal to or greater than the nominal diameter of the joint body +250 mm, and at the position moved by 1/2 to 2/3 of the axial length of the receiving port from the rubber ring, A stopper is provided that can lock the end of the insertion tube to be inserted into the receiving port, and this stopper is formed with a rigidity that allows the end of the insertion tube to pass when a load greater than a predetermined amount acts in the insertion direction of the insertion tube. It has a structure. Further, in the pipe joint according to claim 2 of the present invention, the axial center of the receiving port is greater than the axial center of the joint main body so that the pipe bottom portion of the receiving port and the pipe bottom portion of the joint body are flush with each other. And the stopper is provided at a portion of the receiving port excluding the tube bottom portion.

[0006]

In the pipe joint according to the first aspect of the present invention, when the insertion pipe is inserted into the receiving port until the end portion of the pipe is locked by the stopper, the axial length from the rubber ring of the receiving port to the inner side is the nominal length of the joint body. Diameter +250 mm or more, and the stopper is provided at a position 1/2 to 1/3 of the axial length of the receiving opening from the rubber ring, so that the insertion tube is inserted until it hits the stopper when it is inserted into the receiving opening. By inserting the insertion tube, it is possible to secure a required insertion depth of the insertion tube, and the insertion tube will not easily come off from the receptacle due to vibration such as an earthquake. In addition, when a load greater than a predetermined value is applied in the insertion direction of the insertion tube due to vibration such as an earthquake, the insertion tube can be moved by passing a stopper at the end of the insertion tube. The pipe joint itself is not easily damaged.

In the pipe joint according to the second aspect of the present invention, even if the pipe joint is used in a sewer pipe or a drain pipe, the filth mixed in the sewage is
It is difficult for the step formed on the inner peripheral surface between the receiving opening and the joint body and the stopper formed on the inner peripheral surface of the receiving opening to be caught.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION First, based on FIGS. 1 to 3,
The structure of the pipe joint of the embodiment will be described in detail. 1 is a plan view showing a pipe joint according to an embodiment, FIG. 2 is a II-II sectional view of FIG. 1, and FIG. 3 is a III-III sectional view of FIG.

The pipe joint J of the present embodiment is made of a thermoplastic resin, the joint body 1 is formed in a straight pipe shape, and one end of the joint body 1 has a larger diameter than the joint body 1. A receiving port 2 is provided, and an annular groove 3 is formed at a position near the opening end of the inner peripheral surface of the receiving port 2.
A rubber ring 4 that seals between the insertion tube P that is inserted into the receiving port 2 and the receiving port 2 is attached.

In the pipe joint J, the axial length L from the rubber ring 4 of the receiving port 2 to the back is the joint main body 1
Nominal diameter of D + 250 mm or more, and the insertion pipe P to be inserted into the receiving port 2 on both left and right sides at a position moved from the rubber ring 4 to the rear by 1/2 to 2/3 of the axial length L of the receiving port 2.
Is provided with a stopper 5 capable of locking the end portion of the. That is, since the stoppers 5 are provided on both left and right sides of the inner peripheral surface of the receiving port 2, the tube bottom portion of the receiving port 2 is a flat surface without steps or irregularities. The lower end of the stopper 5 is preferably separated from the bottom point of the pipe by 45 degrees or more as shown in FIG.

The stopper 5 is formed by projecting and deforming a part of the tube wall of the receiving port 2 inward (the projecting surface is flat), and a load of a predetermined amount or more in the insertion direction of the insertion tube P is formed. It has a rigidity that allows the end of the insertion tube P to pass therethrough. The inner peripheral length of the receiving port 2 at the position of the stopper 5 is longer than the outer peripheral length of the insertion tube P.

The axial center BB of the receiving port 2 is more than the axial center AA of the joint main body 1 so that the pipe bottom of the receiving port 2 and the pipe bottom of the joint main body 1 are flush with each other. It is located on the pipe top side, and the dirt mixed in the sewage does not get caught in the step C formed on the inner peripheral surface between the receiving port 2 and the joint body 1.

That is, in the pipe joint J of this embodiment, the insertion pipe P is inserted into the receiving port 2 until the end of the pipe is locked by the stopper 5.
, The axial length L of the receiving port 2 from the rubber ring 4 to the back is equal to or larger than the nominal diameter D + 250 mm of the joint body 1, and the stopper 5 extends from the rubber ring 4 to the back of the axial length L of the receiving port 2. Since the insertion pipe P is provided at the position of 1/2 to 1/3, when the insertion pipe P is inserted into the receiving port 2 until it hits the stopper 5, the insertion depth of the insertion pipe P is required. This can be ensured, and the insertion tube P will not easily come off from the receiving opening 2 due to vibration such as an earthquake. Further, when a load larger than a predetermined value acts in the insertion direction of the insertion pipe P due to vibration such as an earthquake, the pipe joint J is made of a thermoplastic resin and is flexible,
Since the movement of the insertion tube P can be permitted by passing the stopper 5 at the end of the insertion tube P, the insertion tube P and the pipe joint J themselves are not easily damaged. Furthermore, even if it is used for a sewer pipe or a drain pipe, the filth mixed in the sewage will not be discharged into the receiving port 2
Since it is difficult for the step formed on the inner peripheral surface between the joint main body 1 and the stopper formed on the inner peripheral surface of the receiving opening 2 to be caught by the step 5, high drainage efficiency can be maintained.

Although the present embodiment has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and there are design changes and the like within a range not departing from the present embodiment. Also included in the present invention. For example, the sectional shape of the receiving port 2 at the position of the stopper 5 is not limited to the above-described shape, and may be an ellipse as shown in FIG. 4, or a circular shape or an oval shape although not shown. Further, the planar shape of the joint body 1 is not limited to the straight tube shape as described above, and as shown in FIG.
You may make it a 0 degree bending pipe type (b), a Y branch pipe type (c), and a T branch pipe type (d). Further, in the embodiment, the example in which the stopper 5 is formed by a part of the pipe wall of the receiving port 2 is shown. However, the stopper 5 is formed by bonding an elastic material such as rubber to the inner peripheral surface of the receiving port 2. It may be formed by, or may be integrally formed on the inner peripheral surface of the receiving port 2. The cross-sectional shapes of the joint body 1 and the receiving port 2 are
The shape is not limited to a perfect circle, and may be oval or elliptical. In the case of an oval shape, the axis of the receiving port is the intersection C of the oval major axis aa and the minor axis bb as shown in FIG. 6, and it is preferable to provide the stopper 5 at this height.

[0015]

As described above, the present invention claims 1.
In the pipe joint described above, the axial length from the rubber ring to the back of the receiving port is equal to or more than the nominal diameter of the joint body +250 mm, and 1 / the axial length of the receiving port from the rubber ring.
A stopper capable of locking the end portion of the insertion tube to be inserted into the receiving port is provided at a position of 2 to 1/3, and the stopper is
Since the end of the insertion tube is formed with a rigidity that allows it to pass when a load greater than a predetermined amount is applied in the insertion direction of the insertion tube, the insertion tube may come off from the receiving port due to vibration such as an earthquake, or the insertion tube or pipe joint The effect that it is hard to be damaged is obtained.

Further, in the pipe joint according to the second aspect of the present invention, the filth mixed in the sewage is formed on the step formed on the inner peripheral surface between the receiving port and the joint body and on the inner peripheral surface of the receiving port. Since it is hard to get caught in the formed stopper, it is possible to obtain an effect that high drainage efficiency can be maintained.

[Brief description of drawings]

FIG. 1 is a plan view showing a pipe joint according to an embodiment.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a cross-sectional view showing a modified example of the stopper position of the receiving port.

FIG. 5 is a plan view showing a modified example of the joint body.

FIG. 6 is a cross-sectional view showing a modified example of the receiving port.

[Explanation of symbols]

J fitting 1 Joint body 2 Receptacle 3 annular groove 4 rubber ring 5 stopper P insertion tube L Length from the rubber ring to the back in the axial direction D Nominal diameter of joint body

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazuo Takahashi 63 Aoyagi, Sayama-shi, Saitama Shin-Sayama Heights 6-303 (72) Inventor Yamada Yonezoku 3-15-1 Negishidai, Asaka-shi, Saitama Sekisui Kagaku Kogyo (72) Inventor Ryoichi Isayama 3-15-1 Negishidai, Asaka-shi, Saitama Sekisui Kagaku Kogyo Co., Ltd. (72) Inventor Takashi Shikiya 3-4-7 Toranomon, Minato-ku, Tokyo Sekisui Chemical Co., Ltd. In-house (56) Reference JP-A-6-15953 (JP, A) Actual development 52-43715 (JP, U) Actual development 60-45994 (JP, U) Actual publication 54-28854 (JP, Y1) ) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16L 21/00 F16L 47/06

Claims (2)

(57) [Claims] 1. A receiving opening having a larger diameter than that of the joint main body is provided at at least one end of the joint main body, and an insertion pipe to be inserted into the receiving opening and the receiving opening are provided at a position near an opening end of an inner peripheral surface of the receiving main body. In a pipe joint provided with a rubber ring that seals the space between the rubber ring and the back, the axial length from the rubber ring to the back is equal to or more than the nominal diameter of the joint body +250 mm, and the axial length from the rubber ring to the receptacle is A stopper capable of locking the end portion of the insertion tube to be inserted into the receiving port is provided at a position moved by 1/2 to 2/3 of the height, and this stopper acts on a load larger than a predetermined value in the insertion direction of the insertion tube. A pipe joint, characterized in that the end portion of the insertion tube is formed with a rigidity that allows the insertion tube to pass therethrough. 2. The axial center of the receiving port is located closer to the top of the pipe than the axial center of the joint body so that the pipe bottom portion of the receiving port and the pipe bottom portion of the joint body are flush with each other. ,
The pipe joint according to claim 1, wherein the pipe joint is provided in a portion of the receiving port excluding a pipe bottom portion.