JP2535294Y2 - Joint structure for connecting flexible tubes with corrugations - 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 structure for connecting a flexible tube with a corrugation, which can easily connect or disconnect the flexible tube with a corrugation from one direction.

[0002]

2. Description of the Related Art With the development and diversification of construction technology related to electrical equipment in buildings, condominiums, and the like, in recent years, it has been required to easily lay conduits for electric wiring. In response to such demands, laying work using flexible conduits that can be used in a long state, in particular, corrugated flexible conduits made of synthetic resin, is rapidly increasing.

[0003] As a joint for connecting such a corrugated flexible conduit, for example, one of a straight joint, a T-shaped joint, a Y-shaped joint and a joint for connecting a conduit from both sides of the joint is connected to an electric wire connection box. Box connectors for connecting conduits to the other,
Various shapes are known according to the connection form of the conduit. In these joints, for example, in a straight joint, as a structure of the joint, after inserting the conduit into the joint,
A structure in which a conduit is fixed to a joint with a fastener such as a screw has been widely used.

However, in the joint structure of the conventional joint described above, a fastener such as a screw is required for connecting the conduit, and the connection work is troublesome. Therefore, such a fastener is unnecessary, and the conduit can be connected with one touch. A flexible conduit connection connector is provided as a possible so-called one-touch joint (Japanese Utility Model Laid-Open No. 60-79212).

[0005]

In the joint structure of the one-touch joint, once the conduit is pushed in and connected, the connection with the conduit is made again, for example, for redoing the piping. It cannot be pulled out to release it, and it has been a problem when the wiring route of an electric wire that has been cut and re-routed has to be re-executed. Also,
There is also a problem that the structure is complicated due to the fact that the conduit can be connected with one touch, and the cost is higher than that of a general joint.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has a simple and inexpensive joint structure for connecting a flexible tube with a corrugated structure, which can easily connect / disconnect with a conduit from one direction. The purpose is to provide.

[0007]

According to the present invention, in order to achieve the above object, a cylindrical joint body having a locking window on a wall surface and a pipe stopper fitted to one end of the joint body are provided. Having an annular groove, one end of which is inserted into the
In Namizuke flexible pipe connecting joint structure for preventing withdrawal of the corrugated flexible tube that will be continued, the tube stop is a ring portion to be loosely fitted to the outside of the joint body, the joint from the ring portion
In parallel with the wall surface of the hand body, it of the plurality of flange portions extending in a direction to fit into the fitting body and the flange portion
A locking portion that is provided at the tip of the flexible tube and that locks with the locking window and that prevents the connected flexible tube with corrugation from being pulled out. An engaging claw that engages with the annular groove of the above, a stopper that engages with a peripheral edge of the locking window when a pulling force acts on the corrugated flexible tube, and prevents the pipe stopper from being pulled out from the joint body. pushing in the direction of further fitted the tube stop which is fitted to the fitting body, the engaging claw is retracted radially outward, the guide surface to release the engagement between the wave with the flexible tube Are respectively formed, and the corrugated flexible tube is made detachable.

In the joint structure for connecting a flexible pipe with a corrugation of the present invention, there is no particular limitation on the material of the joint for connecting a flexible pipe with a corrugation, but at least the pipe stopper is functionally made of an elastic material such as plastic. It is desirable to use a material.

[0009]

When the corrugated flexible tube is pushed in from the pipe stopper side of the joint for connecting the corrugated flexible tube, the engaging claw of the locking portion provided on the tube stopper is pushed into the corrugated flexible tube. Engaged with the annular groove of
Even if the corrugated flexible tube is pulled, it will not be pulled out. When pulling out the connected corrugated flexible tube from the corrugated flexible tube connection joint portion, the pipe stopper is further pushed into the joint body side, and each engaging claw is guided by the guide surface and the radius is reduced. In this state, the engagement between the engaging claw and the annular groove of the corrugated flexible tube can be easily released. If the corrugated flexible tube is pulled in this state, the corrugated flexible tube is connected. It can be easily pulled out from the joint part.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a box connector provided with a joint portion for connecting a flexible tube with corrugations according to the present invention will be described in detail with reference to FIGS. In the joint structure for connecting a corrugated flexible tube according to the present invention, a connecting joint (hereinafter, simply referred to as a “joint”) 1 is, as shown in FIG.
And a pipe stopper 20 fitted to the joint body 10. For example, in the case of a box connector as shown in FIG. 3, a screw on one side of the main body 10 to which the tube stopper 20 is fitted is provided. Is fixed to the electric wire connection box 2 using the nut 2a, and the flexible tube 30 to be described later is detachably connected by pushing in a later-described corrugated flexible tube 30 from the pipe stopper 20 side of the joint portion 1. is there.

As shown in FIGS. 4 and 5, the joint body 10 is a cylindrical member provided with rectangular cutout windows 12 at opposite positions of a wall surface 11 at one end. Is attached to a connection box or the like by means of a screw portion (not shown) provided in the connector.
The pipe stopper 20 is a cylindrical member that is fitted to one end of the joint body 10 to prevent the corrugated flexible tube from being pulled out. As shown in FIG.
2, 22 and locking portions 23, 23.

The ring portion 21 is loosely fitted to the outside of the joint body 10, and has flanges 21a, 21a projecting radially inward from the ends thereof in a flange shape. Flange part 22
Is parallel to the wall surface 11 of the joint body 10 from the ring portion 21
And extends out in a direction to fit into the joint body 10, the distal locking portion 23 for locking the Kakaritomemado 12 when fitting the tube stopper 20 to the joint body 10 in the radial direction It is provided toward.

As shown in FIG. 7, the engaging portion 23 includes an engaging claw 23a, a stopper 23b, and guide surfaces 23c and 23d.
Are formed with a predetermined width so as to have an elastic force and a predetermined strength. The distal end of the engaging claw 23a engages with an annular groove of a corrugated flexible tube (not shown) connected to the joint portion 1, thereby preventing the corrugated flexible tube from being pulled out. Stopper 23b
When the pull-out force acts on the pipe stopper 20 or the corrugated flexible tube, the pipe stopper 20 is locked on the periphery of the locking window 12 so as to prevent the pipe stopper 20 from being pulled out from the joint body 10. The backward movement of the dowel 23a in the radial direction is restricted.
The guide surfaces 23c and 23d are formed on the inclined surface with respect to the fitting direction to the joint body 10, and when the pipe stopper 20 is further pushed in from the fitting position, the wall surface 1 of the joint body 10 is formed.
1, thereby acting to retreat the engaging claw 23a outward in the radial direction.

In the above-described joint structure for connecting a flexible tube with a corrugation according to the present invention, the joint 1 is formed by inserting the flexible tube with a corrugation 30 having an annular groove 30a into which a pipe stopper 20 is fitted. Push in a predetermined pitch from the side and connect as shown in FIG. At this time, the distance between the engaging claws 23a, 23a facing each other is such that the tube stopper 20 fitted to the joint body 10
Since it is smaller than the outer diameter of 0, there is some resistance at the time of connection.

However, since the pipe stopper 20 is made of an elastic material such as plastic, each engaging claw 23a is elastically deformed in the pushing direction and slightly bent. Accordingly, the corrugated flexible tube 30 is connected to the joint 1 without difficulty in a state where the engaging claws 23a and 23a are engaged with the annular groove 30a. When a force in the pulling direction acts on the corrugated flexible tube 30 connected to the joint portion 1 in this manner, each stopper 23b is locked on the periphery of each locking window 12 of the joint body 10, and The retraction of the claw 23a outward in the radial direction is restricted, and at the same time, the elastic deformation of each engagement claw 23a is prevented. For this reason, the corrugated flexible tube 30 is provided with each engagement claw 23a of the pipe stopper 20 in the annular groove 30a.
Are engaged, so that they do not come off from the joint 1 even when pulled in the pull-out direction, and a firm connection state is maintained.

On the other hand, when it becomes necessary to remove the corrugated flexible tube 30 connected in this manner from the joint portion 1 for, for example, redoing the piping, etc., the pipe stopper 20 of the joint portion 1 is required.
Is further pushed into the joint body 10. Then, the pipe stopper 20 is guided by the guide surfaces 23c and 23d, and as shown in FIG.
And the front end side of each flange portion 22 is slightly bent upward by elastic deformation. Thereby, each locking portion 23 is engaged with the engaging claw 23a protruding inward in the radial direction.
Retreats radially outward, and the annular groove 3 of the corrugated flexible tube 30
The engagement with 0a is released.

As described above, in the joint structure according to the present invention, if the pipe stopper 20 is further pushed into the joint main body 10 and the corrugated flexible tube 30 is pulled in the pulling-out direction, the corrugated flexible tube 30 is drawn. Can be easily removed from the joint portion 1. Here, when the corrugated flexible tube 30 connected to the joint portion 1 is pulled in the pulling-out direction, depending on the material of the corrugated flexible tube 30, due to the structure of the joint portion, the corrugated flexible tube 30 extends in the longitudinal direction. As a result, the engagement claws 23a of the pipe stopper 20 may come off the annular groove 30a, and the corrugated flexible tube 30 may be pulled out of the joint portion 1. For this reason, in such a case, for example, a pipe stopper 40 shown in FIG. 9 is used.

The pipe stopper 40 has a ring portion 41 and flange portions 42, 42 constructed in the same manner as the pipe stopper 20.
And a locking portion configured such that when a pulling force acts on the connected corrugated flexible tube 30, the engaging claw 43a advances radially inward to further deepen the engagement with the annular groove 30a. 4
The ring portion 41 is provided with the joint body 1.
The diameter of the pipe stopper 20 is set to be larger than that of the pipe stopper 20 so that an appropriate gap C is formed between the pipe stopper 20 and the wall surface 11.

The locking portion 43 includes an engaging claw 43a and the guide surface 4
3c and 43d are configured in the same manner as the locking portion 23 of the pipe stopper 20, and the stopper 43b is formed in a portion that locks to the periphery of the locking window 12 of the joint body 10 as shown in FIG. A tapered surface 43e is formed. For this reason, in the joint structure using the pipe stopper 40, when the corrugated flexible tube 30 connected to the joint 1 is pulled in the pulling-out direction, the engaging claws 43a engaged with the annular groove 30a, 43a is moved in the pulling-out direction by the corrugated flexible tube 30. Then, the pipe stopper 40 moves rightward in the drawing direction in the drawing, and the tapered surface 43e of the stopper 43b is locked in the locking window 12 of the joint body 10.

As a result, the tip end of each flange portion 42 of the pipe stopper 40 bends in the diameter-reducing direction, and the distance between the engagement claws 43a, 43a is reduced in accordance with the reduction in the diameter of the corrugated flexible tube 30. The engagement between the annular groove 30a and each engagement claw 43a is maintained. Therefore, with the joint structure according to the present embodiment, the corrugated flexible tube 30 does not come off from the joint 1 even if a pulling force acts in the pull-out direction, and a firm connection state is maintained.

Further, when it becomes necessary to remove the corrugated flexible tube 30, if the tube stopper 40 is further pushed in, the tube stopper 2
It can be easily removed as in the case of 0. In the above-described embodiment, the case where the joint portion is a box connector in which the joint portion is attached to the electric wire connection box in advance as the joint portion structure for connecting a flexible tube with corrugation has been described. However, the present invention is not limited to this. It goes without saying that, depending on the connection form of the flexible tube, it can be used as a connection joint structure in various connection forms of the corrugated flexible tube, such as a straight joint, a T-shaped joint, and a Y-shaped joint.

[0022]

As is clear from the above description, according to the joint structure for connecting a corrugated flexible tube of the present invention, connection / disconnection with the corrugated flexible tube can be easily performed with one touch. In addition, since only two parts, the joint body and the pipe stopper, are required, and the structure is simple in spite of the fact that the corrugated flexible tube can be freely attached and detached, the joint for connecting the corrugated flexible tube can be provided at a low cost. It has an excellent effect that it can be done.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an embodiment of a joint structure for connecting a flexible tube with a corrugation according to the present invention, in which a joint with a corrugated flexible tube is connected to the joint for connecting a flexible tube with a corrugation. FIG. 3 is a partial cross-sectional front view showing the upper half of the structure.

FIG. 2 is a perspective view of a joint portion for connecting a corrugated flexible pipe in which a pipe stopper is fitted to a joint body.

FIG. 3 is a plan view showing a state in which a corrugated flexible tube is connected to a corrugated flexible tube connection box connector having a connecting joint of the present invention attached to an electric wire connection box.

FIG. 4 is a cross-sectional front view showing a main part of a joint body for connection of a flexible tube with corrugations.

FIG. 5 is a side view of the joint main body shown in FIG. 4, as viewed from the insertion side of the corrugated flexible tube.

FIG. 6 is a perspective view showing a pipe stopper which is a component part of the joint portion for connecting a flexible tube with corrugations.

FIG. 7 is an enlarged view of a portion A of the pipe stopper shown in FIG. 6;

FIG. 8 is a partial cross-sectional front view showing the upper half of the joint structure in a state where the flexible tube with a corrugation is pulled out from the joint for connecting a flexible tube with a corrugation in FIG. 1;

FIG. 9 is a view showing another modified example of the pipe stopper in the joint structure for connecting a flexible pipe with a corrugation, showing the joint structure in a state where the flexible pipe with a corrugation is connected to the joint for connecting a flexible pipe with a corrugation. It is a partial sectional front view shown by a half part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Joint part for connection of flexible pipe with corrugation 10 Joint main body 20 Pipe stopper 21 Ring part 22 Flange part 23 Locking part 23a Engaging claw 23b Stopper 23c Guide surface 23d Guide surface 30 Flexible tube with corrugation 30a Annular groove 40 Tube Stopper 41 Ring part 42 Flange part 43 Locking part 43a Engaging claw 43b Stopper 43c Guide surface 43d Guide surface

Claims (1)

(57) [Scope of request for utility model registration] 1. A joint body having a cylindrical shape having a locking window on a wall surface, and a pipe stopper fitted to one end of the joint body.
It has an annular groove and one end is inserted into the pipe stopper and connected.
In Namizuke flexible pipe connecting joint structure for preventing withdrawal of the corrugated flexible tube that Re, the tube stop, the joint body ring portion to be loosely fitted to the outside of the joint body, from the ring portion Parallel to the wall
A plurality of flange portions extending in a direction to be fitted to the joint main body and a plurality of flange portions are provided at respective front ends of the flange portions, and are locked in the locking windows and prevent the connected corrugated flexible tube from being pulled out. An engaging claw that engages with an annular groove of the corrugated flexible tube ; and a peripheral edge of the locking window when a pulling force acts on the corrugated flexible tube. to engage, when pushed in a direction to further fitting the stopper and the tube stop which is fitted to the fitting body to prevent withdrawal from the joint body of the tube stop, before
The serial engaging claw is retracted radially outward, the guide surface to release the engagement between the wave with flexible tube are respectively formed, characterized in that the detachable the wave with the flexible tube Joint structure for connecting flexible tubes with corrugations.