JP2529434Y2 - Corrugated pipe connection fittings - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint used for connecting a corrugated pipe.

[0002]

2. Description of the Related Art Conventionally, a joint for connecting a corrugated pipe has a joint body and a lock cylinder screwed into an inner periphery of a front end of the joint body. The locking cylinder is provided with locking means for locking the inserted corrugated pipe, and the locking corrugated pipe screwed into the joint body is locked and the corrugated pipe inserted inside is locked in the same direction. 2. Description of the Related Art There is known a joint which is pushed and pressed, and a tip portion thereof is pressed against a seal portion in a joint body to seal the joint.

[0003] The connection of the corrugated pipe by this joint is performed by inserting the corrugated pipe into the joint main body from the lock cylinder side until the tip of the corrugated pipe comes into contact with a seal portion in the joint main body, and tightening the lock cylinder. By tightening the lock cylinder, the corrugated pipe is locked and pushed in the same direction.However, the tip of the corrugated pipe comes into contact with the seal portion in the joint body, and further tightening is prevented. The distal end of the corrugated tube pushed in the same direction by the tightening of the body is plastically deformed, so that it comes into close contact with the seal portion to prevent leakage of liquid.

[0004] The sealability of the corrugated pipe by this joint is obtained by press-fitting to the seal portion by plastic deformation of the tip, but this plastic deformation is achieved by tightening the lock cylinder against the joint body. For,
The tightening distance of the lock cylinder is required to be sufficient to ensure sufficient plastic deformation at the tip of the corrugated pipe to ensure sealing performance.If this distance is small, it is sufficient to ensure sealing performance. No plastic deformation can be obtained. Corrugated pipe connection
There is no means to indicate the amount of backward movement of the lock cylinder
And lock cylinder due to vibration during packing or transportation.
Is likely to shift, and
Locked by carelessness or by unskilled workers
Connection with insufficient sealing distance due to insufficient tightening distance of cylinder
There is a risk of being done. To prevent the above situation
To set the tightening distance of the lock cylinder.
Fittings for connecting corrugated pipes have been developed.
(No. 2-11679).

However, in the above-mentioned conventional joint, the lock
You can set the tightening distance of the
For setting the tightening distance of the cylinder and connecting corrugated pipe
When tightening the lock cylinder at the time, the corrugated pipe
There is a problem that the connection work of is difficult .

In view of the above, the present invention provides a proper tightening distance of the lock cylinder by setting the tightening distance of the lock cylinder so that the integrity of the seal can be achieved. As well as the lock cylinder tightening distance.
Tightening the lock cylinder for setting work and connecting the corrugated pipe
Connection work and corrugated pipe connection work.
There is provided a fitting for corrugated pipe connections for the purpose of that.

[0007]

In order to achieve the above object, the present invention comprises a joint body and a lock cylinder which is screwed onto the inner periphery of the front end of the joint body to lock the corrugated pipe. in fitting for corrugated pipe connections for sealing is pressed against the tip seal portion within said fitting body with locking the corrugated pipe by tightening the threaded lock cylinder body, the clamping distance of lock cylinder the formed annularly to set held by notching a part of the spacer b
It is detachably fitted to the outer periphery of the cylinder, and one end is
Provided to lock to the outer circumference of the main body,
When tightened in the body direction, the spacer
Therefore, it is configured to be able to expand in the outer diameter direction.
And The spacer fits around the lock cylinder
Small diameter fitting part and large diameter fitting on the outer periphery of the tip of the joint body
And a small-diameter fitting portion and a large-diameter fitting portion.
Are preferably connected by a tapered surface. In addition,
The small-diameter fitting portion and the large-diameter fitting portion have a first projection and a second projection, respectively.
A projection is formed, and a first projection is formed on the lock cylinder.
And the second projecting shape is capable of engaging with the engagement groove.
It is good to be constituted so that it can be engaged with the engagement groove formed in.

[0008]

[Function] Since the spacer fitted to the outer periphery sets and holds the tightening distance of the lock cylinder screwed to the joint main body, the connecting end of the corrugated pipe is always connected at a fixed distance when connecting the corrugated pipe. Since the corrugated pipe is pressed against the sealing portion in the main body, the corrugated pipe is always connected with a reliable sealing state. And in the spacer
Is formed in an annular shape and a part of the
It is detachably fitted to the outer periphery of the cylinder, and one end of the
The lock cylinder is attached to the outer periphery of the
When tightened in the opposite direction, the spacer
It is configured so that it can be expanded in the radial direction.
To set the tightening distance of the lock cylinder screwed to the fitting body.
With the spacer fitted to the lock cylinder.
By screwing it into the hand body, the tightening distance of the lock
Easy to set the tightening distance of the lock cylinder
It can be carried out. And also connection to corrugated pipe
At the time of tightening the lock cylinder,
When the heat sink expands in the radial direction and comes off the fitting body,
It is necessary to remove the spacer when tightening the lock cylinder
There is no, and the connection work of the corrugated pipe can be easily performed. Soshi
The spacer fits around the outer periphery of the lock cylinder.
Large-diameter fitting that fits around the small-diameter fitting part and the outer periphery of the tip of the joint body
The small diameter fitting portion and the large diameter fitting portion are
When the lock cylinder is connected by the
The spacer pressed toward the joint body by
When the fitting part runs over the outer periphery of the tip of the joint body,
Although it can be expanded in the outer diameter direction, the small diameter fitting part and the large diameter fitting part
The connecting tapered surface is outside the tip of the joint body with the small diameter fitting part
The outer diameter of the spacer makes it easier to get around
Expansion in the direction can be done smoothly. In addition, the small diameter fitting portion
First and second protrusions are formed on the large diameter fitting part
The first projection is formed in an engagement groove formed in the lock cylinder.
Engageable and the second protrusion is formed on the joint body.
When the first protrusion is configured to be engageable with the engagement groove,
In the engagement groove formed in the body, and the second protrusion on the joint body
By engaging the engagement groove formed, the lock cylinder body
Of the joint body and lock cylinder to obtain the proper tightening distance
Positioning can be performed easily and reliably.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. In the drawings, 1 is a joint body,
Inside the joint body 1, a large-diameter through hole 2 is provided on the distal end side.
A small-diameter through-hole 3 connected to the large-diameter through-hole 2 is provided at the back. A stepped circumferential groove 4 is provided at the connecting step between the large diameter through-hole 2 and the small diameter through-hole 3, and is adjacent to the stepped circumferential groove 4 and abuts on the tip end of the corrugated pipe 5 so as to be axially moved. A stopper 6 for preventing escape is provided, and a seal ring 7 for sealing the outer peripheral surface of the corrugated pipe 5 is fitted in the step circumferential groove 4.

A female screw is formed on the inner peripheral surface of the large diameter through hole 2.

Reference numeral 8 denotes a lock cylinder having an external thread formed on the outer periphery thereof and screwed into the large-diameter through hole 2 of the joint main body 1. Inside the lock cylinder 8, there is a through hole 9 corresponding to the outer diameter of the corrugated pipe 5. A rigid spiral spring ring (hereinafter, referred to as a rigid ring) 10 which can be engaged with an outer diameter valley of the outer peripheral surface of the corrugated pipe 5 and which expands and contracts in the circumferential direction is fitted on the inner peripheral surface on the rear end side of the lock cylinder 8. Circumferential groove 1
1 is formed. The tip side groove wall of the circumferential groove 11 is
The rigid ring 10 fitted in the circumferential groove 11 is formed into a tapered pressing surface 12 which is pressed in an oblique centripetal direction and is engaged with an outer diameter valley of the outer peripheral surface of the corrugated pipe 5 to be locked. . Reference numeral 13 denotes a ring supporter slidably fitted on the inner periphery of the rear end of the lock cylinder 8. The ring supporter 13 always presses the rigid ring 10 in the circumferential groove 11 against the tapered pressing surface 12 with its tip end to eliminate the play of the rigid ring 10 in the circumferential groove 11 and always keep the rigid ring 10 concentric. To keep.

Numeral 14 denotes a protrusion formed on the outer periphery of the distal end of the lock cylinder 8, which is formed in a hexagonal shape so that the lock cylinder 8 can be easily screwed.

Reference numeral 15 denotes a lock cylinder 8 screwed to the joint body 1.
This is a resin spacer for setting the tightening distance of. The spacer 15 includes a small-diameter fitting portion 16 fitted to the outer periphery of the lock cylinder 8 and a large-diameter fitting portion 17 fitted to the outer periphery of the distal end portion of the joint body 1. Fitting part 1
The inner surface 18 of the connecting portion with the taper 7 is a tapered surface. Soshi
The spacer 15 is formed in a ring shape, and
A notch groove 19 is provided along the longitudinal direction of the joint body.
You. A first ridge 21 and a second ridge 22 are formed in the circumferential direction on the inner peripheral surface of the end of the small diameter fitting portion 16 and the inner peripheral surface of the end of the large diameter fitting portion 17 of the spacer 15, respectively. . On the other hand, on the outer peripheral surface of the lock cylinder 8 , an engagement groove 23 is formed inside the protruding portion 14 so that the first ridge 21 is detachably engaged. wherein the surface first
An engagement groove 24 with which the two ridges 22 are detachably engaged is formed.

The spacer 15 is fitted on the outer periphery of the joint body 1 and the lock cylinder 8 screwed to the joint body 1, and a first formed on the inner peripheral surface of the small-diameter fitting portion 16 of the spacer 15 . The ridge 21 was engaged with the engagement groove 23 of the lock cylinder 8, and the second ridge 22 formed on the inner peripheral surface of the large-diameter fitting portion 17 was engaged with the engagement groove 24 of the joint body 1. When the joint body 1
With respect to the positional relationship of the lock cylinder 8 in the axial direction with respect to, the tightening distance of the lock cylinder 8 is set to a necessary and sufficient distance to secure the seal of the corrugated pipe 5.

Next, connection of the corrugated pipe by the joint for connecting a corrugated pipe shown in the above embodiment will be described.

In the disconnected state, the lock cylinder 8 screwed to the joint body 1 is tightened so that the first protrusion 21 of the small diameter fitting portion 16 of the spacer 15 is engaged with the engagement groove 23 of the lock cylinder 8.
Then, the second projection 22 of the large-diameter fitting portion 17 is engaged with the engagement groove 24 of the joint body 1. In this state, the distal end of the corrugated pipe 5 is inserted from the side of the lock cylinder 8 until it comes into contact with the stopper 6 in the joint body 1. When the lock cylinder 8 is rotated and tightened in this state, the spacer 15 is pushed in the same direction by the protrusion 14 formed on the outer periphery of the distal end of the lock cylinder 8 due to the tightening of the lock cylinder 8, and the spacer 15 has a small diameter. fitting portion 16 rides on the tip outer periphery of the joint body 1, although notch groove 19 is Ru is spread radially outward, this and
The inner surface 1 of the connecting portion between the small-diameter fitting portion 16 and the large-diameter fitting portion 17
8 is the tip of the joint body 1 of the small diameter fitting portion 16
The spacer 1
5 can be smoothly expanded in the outer diameter direction. As above
Spacer by Rukoto notched groove 19 is spread in the 1
5 comes off from the joint body 1. Then, the lock cylinder 8 presses the tip of the corrugated pipe 5 against the stopper 6 at a distance set by the spacer 15. The distal end of the corrugated pipe 5 pressed against the stopper 6 is plastically deformed and pressed against the seal ring 7 to be connected with a reliable sealing state.

As described above, according to the present invention, the lock cylinder is provided.
To be able to set the tightening distance of
To obtain the proper tightening distance of the lock cylinder and complete the seal.
Completeness, and the locking cylinder
Tightening the lock cylinder for setting work and connecting the corrugated pipe
And the connection work of the corrugated pipe can be facilitated .

[Brief description of the drawings]

FIG. 1 is a partial longitudinal side view showing one embodiment of the present invention.

FIG. 2 is an enlarged front view of the spacer shown in FIG.

FIG. 3 is a partial longitudinal side view of FIG. 2;

[Explanation of symbols]

1 …………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… ………………………… Stopper 7 …………………………………… Seal ring 8 …………… ……………………………………………………………………………………………………… Spacer <br/> -16 ……………… …………………… Small diameter fitting
Part 17: Large-diameter fitting
Part 19 …………………… Notch groove 21 ………………………………………………………………… First ridge 22 …………………………………………………………………………………………………………………………… engagement groove 24 ……… ………………………… engagement groove

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshikazu Kobayashi 2-9-4 Nakaikegami, Ota-ku, Tokyo Nitto Kohki Co., Ltd. (72) Yasuhiko Murase 5-3-1-10 Nishitenma, Kita-ku, Osaka-shi Inside Nitto Koki Co., Ltd. (72) Inventor Nankai Kinumoto 4-1-2 Hiranocho, Chuo-ku, Osaka City Inside Osaka Gas Co., Ltd. (72) Toshihiko Yanagisawa 4-1-1 Hiranocho, Chuo-ku, Osaka-shi No. 2 Inside Osaka Gas Co., Ltd. (72) Inventor Toshio Shibuchi 2-10-16 Minamikagaya, Suminoe-ku, Osaka Shinwa Sangyo Co., Ltd. (56) References JP 1-295093 (JP, A) JP-A-1-224593 (JP, A) JP-A-3-69785 (JP, U) JP-A-2-11679 (JP, Y2)

Claims (3)

(57) [Scope of request for utility model registration] 1. A joint body comprising: a joint body; and a lock cylinder body which is screwed into an inner periphery of a front end of the joint body to lock a corrugated pipe.
In fitting for corrugated pipe connections for sealing is pressed against the tip seal portion within said fitting body with locking the corrugated pipe by tightening the locking cylinder body is screwed into the joint body, tightening the lock cylinder A spacer that is formed in an annular shape and holds a part of the
Removably fits around the outer periphery of the lock cylinder, and connects one end
It is provided to be locked on the outer periphery of the hand body, and the lock cylinder is
When tightened in the body direction, the spacer is at the tip of the joint body.
A joint for connecting a corrugated pipe, which is configured to be able to expand in the outer diameter direction . 2. The outer periphery of the lock cylinder body, wherein the spacer is
To the small diameter fitting part to be fitted to the outer periphery of the tip of the joint body
The small diameter fitting portion and the large diameter fitting portion
2. The attachment portion is connected by a tapered surface.
For connecting corrugated pipes. 3. The small diameter fitting portion and the large diameter fitting portion have
A first protrusion and a second protrusion are formed, respectively, and the first protrusion is
And a second engagement groove formed in the lock cylinder.
The protruding shape is configured to be able to engage with an engagement groove formed in the joint body.
The joint for connecting a corrugated pipe according to claim 2, which is formed.