JPH0752473Y2 - Pipe fitting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a piping joint capable of easily connecting a piping pipe to various tanks of an automobile or the like.

[Prior Art] FIG. 13 shows a conventional piping joint called an eye union type, which covers the opening 1a of the storage tank 1 with a plate 2 and forms the tip of the piping pipe with an eye bolt 3. The eye union 4 is liquid-tightly connected to the communication hole 2a of the plate 2.

The metal storage tank 1 has an upper opening 1a,
The plate 2 is covered with a seal member 5 on the opening 1a. The plate 2 has a through hole 2c in the peripheral portion thereof, and the screw 6 is screwed into the female screw 1b provided on the upper surface of the storage tank 1 through the through hole 2c, so that the same as the tank 1. The plate 2 and the plate 2 are fixed to each other.

The plate 2 has a communication hole 2a whose wall portion is a female screw, and a cylinder portion 2b for sucking and discharging the stored liquid from the bottom of the storage tank 1 is provided on the tank inner surface side of the communication hole 2a. There is.

For the female screw of the communication hole 2a, the eye union 4 is
The eyebolt 3 is screwed through the eyebolt 3, and the eyebolt 3 has a small hole 3a which communicates from the female screw base portion to the male screw tip portion. The eye union 4 penetrated by the bolt 3 has a hollow disk shape having through holes 4a and 4b on the upper surface and the lower surface, and the pipe 4c is connected to the same side surface.

For the piping work, after fixing the plate 2 on the storage tank 1a, the through hole 4b of the eye union 4 and the communication hole of the plate 2 are connected.
2a is aligned with the eyebolt 3, and the eyebolt 3 is inserted into the lower side through hole 4b from the upper side through hole 4a of the eye union 4, and the male screw of the bolt 3 and the female screw of the communicating hole 2a are screwed together. . At this time, the eyebolt 3 is tightened to a predetermined torque with a tool such as a wrench.

[Problems to be solved by the invention] However, under such a configuration, the number of man-hours required for joining such as eye union alignment, eye bolt screwing, and tightening torque management becomes very large.

On the other hand, although such a storage tank is usually made of iron,
When such a metal tank is used as a fuel tank, there is a problem in terms of rust prevention in the present day when there is a high possibility that the fuel that easily contains water will increase. Therefore, even if you try to solve the problem of rust prevention surface by resinizing the storage tank etc., high torque tightening work is required with the conventional configuration,
Resin cannot withstand such tightening and cannot be made into resin.

The present invention has been made to address the above problems,
It is an object of the present invention to provide a piping joint that facilitates piping work and can be manufactured from resin.

[Means for Solving the Problems] In order to achieve the above object, a first device (device according to claim 1) is a thick plate member for covering the opening of a storage tank having an opening in a part thereof. In a pipe joint comprising a plate having a communication hole for communicating both surfaces and a joint body for connecting a pipe for pipe to the storage tank through the communication hole, a cylinder obtained by bending the joint body into an L shape. Shaped into a cylindrical body, one end of which serves as a communication hole insertion end for insertion into the communication hole, and the other end of which serves as a pipe connection end connectable to the pipe for pipe, and the communication hole of the plate. With the communication hole insertion end of the joint body and a cylindrical through hole having substantially the same diameter as the insertion end that can be inserted,
On the outer surface of the plate, a joint body made of a substantially J-shaped flexible member that extends from the outer surface of the plate in the axial direction of the communication hole and has its end bent in the tangential direction of the communication hole. The engagement tool is fixed, and an annular groove is provided in the communication hole insertion end of the joint body or the inner peripheral wall of the communication hole of the plate, and the O-ring is held in the annular groove.

A second invention (the invention according to claim 2) is a plate having a communication hole which is formed of a thick plate-like member for covering the opening of a storage tank partially having an opening, and which has a communication hole for communicating both surfaces, In a pipe joint comprising a joint body for connecting a pipe for pipe to the storage tank via the communication hole, the joint body is formed into a cylindrical tubular body bent into an L shape, and one end of the joint body is formed. It is a communication hole insertion end to be inserted into the communication hole, and the other end is a pipe connection end connectable to the piping pipe, and the end of the communication hole is projected in the radial direction on the outer periphery of the communication hole insertion end. Providing a protruding portion, the communication hole of the plate is a cylindrical through hole having a diameter substantially equal to that of the insertion hole into which the communication hole insertion end of the joint body can be inserted, and the inner peripheral wall of the communication hole is , Communicating with the outer surface of the plate and the outer surface Introducing groove through which the protrusion can pass toward the inside, and an engaging groove through which the protrusion can pass from the inner end of the introducing groove along the circumferential direction of the wall portion, and A joint body engaging member made of a substantially J-shaped flexible member on the outer surface, which extends from the outer surface of the plate in the axial direction of the communication hole and has its end bent in the tangential direction of the communication hole. Is fixed, and further, an annular groove is formed in the communication hole insertion end of the joint body or the inner peripheral wall of the communication hole of the plate, and an O-ring is held in the annular groove.

[Operation and Effect of the Invention] In the present invention configured as described above, in connecting the joint body to the plate, the connecting hole insertion end of the joint body is made cylindrical and the side of the communicating hole provided in the plate also has this shape. Since the cylindrical through hole has the same diameter as the communication hole insertion end and a seal member consisting of an O-ring is provided between them, insert the communication hole insertion end of the joint into the communication hole of the plate. Both are connected in a liquid-tight manner by simply doing.

At this time, in the first invention, the joint body is L-shaped,
Since an approximately J-shaped joint body engaging tool is provided on the outer surface of the plate, when the joint body is inserted into the communication hole and then rotated, a part of the joint body engages with the joint body engaging tool. The joint body is inserted and engaged in the bent portion, and it is impossible to move the joint body along the axial direction of the communication hole, so that the joint body is prevented from coming off.

Further, in the second invention, with the engaging structure of the L-shaped joint body and the J-shaped joint body engaging tool in the first invention, the joint body is inserted into the communication hole when the joint body is inserted into the communication hole. Insert the provided protrusion along the introduction groove provided in the wall portion of the communication hole, and engage the engagement groove provided along the circumferential direction of the communication hole when it is inserted to the end portion of the introduction groove. We are trying to prevent the joint body from coming off. Therefore, according to the second aspect, the joint body is more completely prevented from coming off than the first aspect.

That is, according to each of the above inventions, the piping work is completed by inserting the joint body into the communication hole of the plate and rotating it by a predetermined angle, and the assembly work is easy and can be performed in a short time. Is effective.

Further, since there is no need for the conventional tightening with high torque, it is possible to manufacture not only metal but also resin.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 schematically show a first embodiment of the present invention.

The storage tank 11 has a cylindrical opening 11 that opens upward.
It is a resin container provided with a, and a female screw to be screwed with the plate 12 is formed on the inner peripheral wall of the opening 11a.

The plate 12 is a circular thick plate-shaped resin member that covers the opening 11a of the storage tank 11, and has a cylindrical protrusion 12a facing the opening 11a and the opening 11a on the upper surface of the storage tank 11. It is composed of a flange portion 12b that abuts the peripheral portion and a tubular portion 12c that is attached toward the inner surface of the storage tank 11. The outer peripheral wall of the protrusion 12a is provided with a male screw which is screwed with a female screw provided on the inner peripheral wall of the opening 11a, and the flange 12b is provided with an annular groove 12d toward the accommodation tank 11 side.
Is provided. A first O-ring 13 that seals the storage tank 11 and the plate 12 is housed in the annular groove 12d.

A communication hole 12e for communicating the inside and outside of the storage tank 11 is provided in the center of the plate 12, and the communication hole 12e is provided with a step portion 12e1 provided in the middle as shown in FIGS. 3 and 4.
A large diameter portion 12e2 is provided on the outer surface side of the storage tank 11 and a small diameter portion 12e3 is provided on the inner surface side of the storage tank 11. Large diameter part 12
Both e2 and the small diameter portion 12e3 are cylindrical through holes, and the joint body 14 is inserted into the large diameter portion 12e2 so as to be slidable in the axial direction and rotatable about the coaxial line.

As shown in FIGS. 5 and 6, the joint body 14 is an L-shaped resin cylindrical member having a through hole in the axial direction, and the communication hole insertion end 14a is inserted into the communication hole 12e. And a pipe connection end 14b to which the pipe P is integrally connected.

The communication hole insertion end 14a is formed into a cylindrical shape having substantially the same diameter as the insertion end that can be inserted into the large diameter portion 12e2, and an annular groove 14c is provided on the outer periphery thereof, and the annular groove 14c. A second O-ring 15 that seals the communication hole 12e and the joint body 14 is housed therein.

On the plate 12, there is provided a joint body engagement tool 16 for fixing the pipe connection end 14b of the joint body 14 at a predetermined position when the joint body 14 has its communication hole insertion end 14a inserted into the communication hole 12e. Has been. The joint body engaging member 16 is formed of a flexible member in a substantially J shape, and the plate 1 is formed by a linear base portion 16b with the bent portion 16a directed toward the tangential direction of the communication hole 12e.
2 It adheres to the surface.

Next, the assembling of the pipe joint having the above structure will be described.

First, the O-ring 13 is placed in the annular groove 12d provided in the plate 12.
Is inserted, and the projection 12a of the plate 12 is aligned with the opening 11a of the storage tank 11 and screwed with the female screw and the male screw provided on both. When tightened sufficiently, the O-ring 13 is compressed by the storage tank 11 and the plate 12 and seals between them.

Regarding the joint body 14 as well, the O-ring 15 is housed in the annular groove 14c provided on the outer periphery of the communication hole insertion end 14a, and the communication hole insertion end 1
4a is inserted into the communication hole 12e opened on the plate 12. The large diameter portion 12e2 of the communication hole 12e has substantially the same diameter so that the communication hole insertion end 14a can be inserted, and the joint body 14 is inserted into the communication hole 12e with a slight margin. Further, at this time, the O-ring 15 housed in the annular groove 14c on the outer periphery of the communication hole insertion end 14a is compressed by the wall portion of the annular groove 14c and the wall portion of the large diameter portion 12e2 of the communication hole 12e. , Joint body
14 and plate 12 are sealed.

When the joint body 14 is inserted into the communication hole 12e, as shown by the chain double-dashed line in FIG.
Insert the 6 and 6 so that their angles do not interfere with each other. The end of the communication hole insertion end 14a has a step portion 12 in the communication hole 12e.
When inserted until reaching e1, the pipe connecting end 14b is rotated counterclockwise around the axis of the communication hole 12e. Then, the pipe connecting end 14b is inserted into the bent portion 16a of the joint body engaging tool 16, and the elasticity of the joint body engaging tool 16 holds the joint body 14 at the same position. The bent portion 16a of the joint body 14 has a semicircular shape and the pipe connecting end 14b is connected to the plate
Since the pipe connecting end 14b is pressed onto the surface, the pipe connecting end 14b is held against the force of pulling out in the coaxial direction with the rotation direction about the axis of the communication hole 12e.

That is, the communication hole insertion end 14a of the joint body 14 is vertically inserted into the large diameter portion 12e2 from above the communication hole 12e, and the communication hole insertion end 14a is inserted.
When the tip of the pipe contacts the stepped portion 12e1, the pipe connecting end 14b is rotated by a predetermined angle to complete the piping work.

7 and 8 schematically show a second embodiment of the present invention. The same or corresponding parts as those in the first embodiment described above are designated by the same reference numerals.

The plate 12 has a communication hole, as shown in FIGS. 9 and 10.
The large-diameter portion 12e2 of 12e has two-stage paragraphs 12e4, 12e5 on the opening side, and the inner diameter is larger than the large-diameter portion 12 on the stepped portion 12e4 on the opening side.
A ring-shaped joint body engagement lid 12 that has the same diameter as the inner diameter of e2 and the outer diameter that is the same as the inner diameter of the stepped portion 12e4 on the opening side.
f is covered. The joint body engagement lid 12f is made of resin similarly to the plate 12, and has a notch 12f1 on the ring-shaped inner surface side. By covering the joint body engagement lid 12f on the step portion 12e4, a ring-shaped engagement groove 12e6 coaxial with the communication hole 12e is formed by the step portion 12e5 and the bottom surface of the engagement lid 12f. Notch 1 of engaging lid 12f
2f1 serves as an introduction groove 12e7 for the engagement groove 12e6.

As shown in FIG. 11 and FIG. 12, the joint body 14 has a protrusion 14d on the outer periphery of the communication hole insertion end 14a thereof.
d is the introduction groove 12 when the joint body 14 is inserted into the communication hole 12e.
The size is such that it can be inserted into the engaging groove 12e6 via e7.

Other structures, such as the O-ring 13 for sealing the storage tank 11 and the plate 12 and the joint body engaging member 16, are the same as those in the first embodiment.

Next, the assembling of the pipe joint in the second embodiment having the above configuration will be described.

As with the first embodiment, the assembling of the storage tank 11 and the plate 12 is screwed by the male screw and the female screw provided on the opening 11a of the storage tank 11 and the projection 12a of the plate 12 with the O-ring 13 interposed. I will do it at least. As for the plate 12, the joint body engaging lid 12f is covered on the stepped portion 12e4 of the communication hole 12e and fixed by an adhesive or the like.

The joint body 14 accommodates the O-ring 15 in the annular groove 14c provided at the communication hole insertion end 14a, and the communication hole 12e from the communication hole insertion end 14a.
At this time, the projection 14d provided on the joint body 14 and the notch 12f1 provided on the joint body engagement lid 12f on the communication hole 12e are aligned and inserted at this time. This state is shown by a chain double-dashed line in FIG.

When the protrusion 14d is inserted into the engaging groove 12e6 through the introduction groove 12e7 formed of the notch 12f1, the joint body 14 is opened as a communication hole.
Rotate about 90 degrees counterclockwise around the axis of 12e. Then, as shown by the solid line in FIG. 8, the pipe connecting end 14b of the joint body 14 is inserted into the bent portion 16a of the joint body engaging tool 16 and is engaged at the same position by the elasticity of the bent portion 16a. It

In the second embodiment, since the joint body 14 is held by the bent portion 16a of the joint body engagement tool 16 and cannot rotate from the same position, the projection 14d and the engagement groove 12e6 are always engaged thereafter. Further, since the pipe connecting end 14b and the joint body engaging member 16 are engaged with each other, double retaining is achieved.

In each of the above embodiments, the joint body 14 and the plate 12
To connect liquid-tightly with the communication hole insertion end 14 of the joint body 14.
a The annular groove 14c is provided on the outer periphery to accommodate the O-ring 15, but the same effect can be obtained by providing the annular groove on the inner peripheral wall surface side of the communication hole 12e to hold the O-ring.

[Brief description of drawings]

FIG. 1 is a sectional view of a pipe joint according to a first embodiment of the present invention, FIG. 2 is a top view of the same, FIG. 3 is a top view of a communication hole of a plate, and FIG. FIG. 5 is a top view of the joint body, FIG. 6 is a side view of the same, FIG. 7 is a sectional view of a pipe joint according to a second embodiment of the present invention, FIG. 8 is a top view of the same, and FIG. Is a top view of the communication hole of the plate, FIG. 10 is a sectional view of the same, FIG. 11 is a top view of the joint body, FIG. 12 is a side view of the same, and FIG.
The figure is a cross-sectional view of a conventional piping joint. Explanation of reference numerals 11 ... Storage tank, 11a ... Opening portion, 12 ... Plate, 12e ... Communication hole, 12e6 ... Engaging groove, 12e7 ... Introducing groove, 14 ... Joint body, 14a
… Communication hole insertion end, 14b… Pipe connection end, 14c… Annular groove, 14
d ... Protrusion, 15 ... Second O-ring, 16 ... Joint body engaging tool, 1
6a: bent portion, 16b: base portion, P: piping pipe.

Claims (2)

[Scope of utility model registration request] 1. A plate having a communication hole, which is formed of a thick plate-like member for covering the opening of a storage tank partially having an opening and which connects both surfaces, and a pipe to the storage tank via the communication hole. In a pipe joint comprising a joint body for connecting a pipe for use, the joint body is formed into a cylindrical tubular body bent into an L shape, and one end of the joint body is connected to a communication hole insertion end. While the other end is a pipe connection end that can be connected to the pipe for pipe, the communication hole of the plate has a cylindrical shape with the same diameter as the insertion end into which the communication hole insertion end of the joint body can be inserted. A substantially J-shaped flexure which is a through hole and extends on the outer surface of the plate in the axial direction of the communication hole from the outer surface of the plate and has an end bent in the tangential direction of the communication hole. Joint made of flexible material An engagement tool is fixed, and an annular groove is provided in the communication hole insertion end of the joint body or an inner peripheral wall of the communication hole of the plate, and an O-ring is held in the annular groove. Piping joint. 2. A plate having a communication hole, which is formed of a thick plate-like member for covering the opening of a storage tank partially having an opening and which communicates both surfaces, and a pipe to the storage tank via the communication hole. In a pipe joint comprising a joint body for connecting a pipe for use, the joint body is formed into a cylindrical tubular body bent into an L shape, and one end of the joint body is connected to a communication hole insertion end. And the other end is a pipe connecting end that can be connected to the pipe for pipe, and a protrusion protruding in the radial direction of the end is provided on the outer periphery of the communication hole insertion end, and the communicating hole of the plate is provided. Is a cylindrical through-hole having the same diameter as the insertion end insertable communication hole insertion end of the joint body,
The inner peripheral wall portion of the communication hole has an introduction groove that communicates with the outer surface of the plate and allows the protrusion to pass inward from the outer surface, and the circumference of the wall portion from the inner end of the introduction groove. An engaging groove through which the protrusion can pass is provided along a direction, and an outer surface of the plate extends from the outer surface of the plate in the axial direction of the communication hole, and an end portion is tangential to the communication hole. A joint body engaging member made of a substantially J-shaped flexible member that is bent toward the side is fixed, and an annular groove is formed in the communication hole insertion end of the joint body or the inner peripheral wall of the communication hole of the plate. A pipe joint characterized by being provided and holding an O-ring in the annular groove.