JP2850103B2 - Pipe connection mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection mechanism for connecting a large-diameter pipe and a small-diameter pipe which can be fitted.

[0002]

2. Description of the Related Art Conventionally, a pipe is generally connected with a female screw formed on an inner peripheral surface of a connecting end of one pipe and a male screw formed on an outer peripheral surface of a connecting end of the other pipe. There is a known type in which a female screw of a pipe is connected to a male screw of the other pipe by screwing, and a type in which a male screw is formed on the outer peripheral surface of the connection side end of both pipes and connected by a nut. ing.

[0003]

According to the above-mentioned conventional pipe connection mechanism, a screw must be turned for each connection and disconnection of the pipe, which is troublesome.

[0004] In view of the above, the present invention provides a pipe connection mechanism for the purpose of enabling easy connection and disconnection with a simple operation.

[0005]

In order to achieve the above object, the present invention provides a pipe connecting mechanism for connecting a large diameter pipe and a small diameter pipe which can be fitted, wherein a long groove is formed in the small diameter pipe in the axial direction. Then, on the outer peripheral surface of the small-diameter pipe, one end of a plate-like or linear spring member having a width or thickness that can be inserted into the long groove is fixedly attached to the rear end side of the long groove, and is attached to the spring member. Forming a curved portion that curves outward from the small-diameter pipe from the fixed portion, and an engaging projection that projects outward from the small-diameter pipe at the distal end of the curved portion. The large-diameter pipe has a configuration in which an engagement hole with which the engagement projection is engageable is formed at a tip end of the large-diameter pipe so that the engagement projection can be engaged with the small-diameter pipe.

[0006]

According to the present invention, the curved portion of the spring member having one end fixed to the outer periphery of the small-diameter pipe and the engaging projection provided at the tip of the curved portion are always in a state of protruding to the outer periphery of the small-diameter pipe. When the bending portion is pushed toward the small-diameter pipe, the spring member is bent in the same direction against the elastic force, and the distal end side of the bending portion and the engaging projection provided at the distal end are formed on the small-diameter pipe. Immerse into the small diameter pipe through the long groove.

In this state, a small-diameter pipe is inserted into the distal end opening of the large-diameter pipe, the pressing of the spring member is released, the insertion of the small-diameter pipe is continued, and the engaging projection is formed at the distal end of the large-diameter pipe. When the engagement protrusions coincide with the engagement holes, the engagement protrusions are engaged with the engagement holes by the restoring force of the spring member, thereby connecting the large-diameter pipe and the small-diameter pipe.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. FIGS. 1 to 4 show an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a large-diameter pipe, and 2 denotes a small-diameter pipe that can be fitted into the opening at the end of the large-diameter pipe 1. A long groove 3 is formed in the distal end side of the small diameter pipe 2 in the axial direction. Reference numeral 4 denotes a plate-like or linear spring member having a width or thickness that can be inserted into the long groove 3, and is disposed on the outer peripheral surface of the small-diameter pipe 2 so as to overlap the long groove 3, and one end of the spring member is provided. It is fixed to the rear end by a stopper 5.

The spring member 4 has a curved portion 6 which is bent outward from the small-diameter pipe 2 from the fixed portion, and a distal end of the curved portion 6 projects outward from the small-diameter pipe 2. Engaging projection 7 is provided. The curved portion 6 and the engaging projection 7 are able to move in and out of the small-diameter pipe 2 through the long groove 3. Normally, the bending portion 6 and the engaging projection 7 move outward from the outer peripheral surface of the small-diameter pipe 2. It is in a protruding state (FIG. 2), and the long groove 3 of the small-diameter pipe 2 resists the bending portion 6 against the elastic force.
By pressing inward, the curved portion 6 and the engagement protrusion 7 are immersed in the small diameter pipe 2 through the long groove 3 (FIG. 3).

FIGS. 2 and 6 show the engagement projection 7.
As in the embodiment shown in FIG. 5, the distal end of the bending portion 6 may be formed by bending, or as in the embodiment shown in FIG. 7 may be fixedly provided. Further, in the embodiment shown in FIG. 6, the distal end of the engaging projection 7 is extended and folded to form an inclined portion 8 inclined in the distal direction. On the other hand, in the large-diameter pipe 1, an engagement hole 9 with which the engagement protrusion 7 can be engaged is provided at a tip end thereof.
Are formed.

Next, the operation of the above embodiment will be described. When connecting the large-diameter pipe 1 and the small-diameter pipe 2, first, the curved portion 6 of the spring member 4, one end of which is fixed to the outer periphery of the small-diameter pipe 2, is bored by the elastic force of the spring member 4. 2 is pressed inward into the long groove 3, and the curved portion 6 and the engaging projection 7 provided at the tip of the curved portion 6 are immersed in the small diameter pipe 2 through the long groove 3.

In this state, the small-diameter pipe 2 is fitted to the large-diameter pipe 1 after the engagement hole 9 of the large-diameter pipe 1 and the long groove 3 of the small-diameter pipe 2 are aligned with each other. When the inner peripheral surface of the diameter pipe 1 reaches above the engagement protrusion 7 immersed in the small diameter pipe 2, the pressing of the bending portion 6 is released. As a result, the engaging projection 7 resiliently comes into contact with the inner peripheral surface of the large diameter pipe 1 by the resilient force of the spring member 4 (FIG. 3).

In this state, when the small-diameter pipe 2 is pushed into the large-diameter pipe 1, the engaging projection 7 slides on the inner peripheral surface of the large-diameter pipe 1, and the engaging projection 7 and the large-diameter pipe 1 When the engagement hole 9 formed in the first member 1 coincides with the engagement member 9, the engagement protrusion 7
The large-diameter pipe 1 and the small-diameter pipe 2 are connected to each other by the resilient force.

When the large-diameter pipe 1 and the small-diameter pipe 2 connected as described above are separated from each other, the bending portion 6 of the spring member 4 is pressed to immerse the engaging projection 7 into the small-diameter pipe 2. Let it. As a result, the engaging projection 7 is disengaged from the engaging hole 9 of the large-diameter pipe 1. In this state, the large-diameter pipe 1 and the small-diameter pipe 2 are separated by pulling out the small-diameter pipe 2 from the large-diameter pipe 1. You.

Further, as shown in the embodiment shown in FIG. 6, if the distal end of the engaging projection 7 is extended and turned back to form an inclined portion 8 inclined in the distal direction, the large-diameter pipe 1 and the small-diameter When the small-diameter pipe 2 is pushed into the large-diameter pipe 1 without pressing the curved portion 6 of the spring member 4 in connection with the pipe 2,
The inclined portion 8 is pushed by the tip of the large-diameter pipe 1, and the inclined portion 8 slides on the tip of the large-diameter pipe 1 and sinks into the small-diameter pipe 2. Is immersed in the small-diameter pipe 2 and the large-diameter pipe 1 and the small-diameter pipe 2
(Fig. 7). When the large-diameter pipe 1 is further pushed into the small-diameter pipe 2 without pressing the curved section 6 even when the separation is performed, the inclined section 8 is pushed at the end of the engagement hole 9 of the large-diameter pipe 1. Thereby, the inclined portion 8 is sunk into the small-diameter pipe 2 while sliding on the end of the engagement hole 9, whereby the engagement protrusion 7 is disengaged from the engagement hole 9,
The large-diameter pipe 1 and the small-diameter pipe 2 can be separated (FIG. 8). In this state, the small-diameter pipe 2 is rotated with respect to the large-diameter pipe 1 to displace the positions of the engaging holes 9 and the long grooves 3. By pulling out the small diameter pipe 2 from the pipe 1, the large diameter pipe 1 and the small diameter pipe 2 can be separated. Thus, the connection and disconnection between the large-diameter pipe 1 and the small-diameter pipe 2 can be performed with one touch.

[0016]

As described above, according to the present invention, two pipes can be easily and reliably connected and separated by a simple operation, and the structure is simple, so that the production is easy.
There is an effect that it can be obtained at low cost.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view showing a connection process of the embodiment shown in FIG. 1;

FIG. 4 is a sectional view showing a connection state of the embodiment shown in FIG. 1;

FIG. 5 is a sectional view showing another embodiment.

FIG. 6 is a sectional view showing another embodiment.

FIG. 7 is a sectional view showing a connection process of the embodiment shown in FIG. 6;

FIG. 8 is a sectional view showing a process of separation of the embodiment shown in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Large-diameter pipe 2 Small-diameter pipe 3 Long groove 4 Spring member 5 Stopper 6 Bending part 7 Engagement projection part 8 Inclined part 9 Engagement hole

Claims (1)

(57) [Claims] 1. A pipe connecting mechanism for connecting a large-diameter pipe and a small-diameter pipe that can be fitted, wherein a long groove is formed in the small-diameter pipe in an axial direction, and the long groove is formed on an outer peripheral surface of the small-diameter pipe. One end of a plate-like or linear spring member having a width or thickness that can be inserted into the long groove is fixed at the end side, and the spring member is bent outward from the small-diameter pipe from the fixing portion. Forming a curved portion and providing an engaging projection protruding outward of the small diameter pipe at the distal end of the curved portion, allowing the curved portion and the engaging projection to protrude and retract into and out of the small diameter pipe through a long groove,
Further, in the large-diameter pipe, an engagement hole with which the engagement protrusion can be engaged is formed at a distal end thereof.