JPH08170615A - Pipe connecting mechanism - Google Patents

Abstract

PURPOSE: To easily connect and separate pipes with simple operation. CONSTITUTION: In pipes connecting mechanism for connecting a large diameter pipe 1 and a small diameter pipe 2 that can be fitted to each other, an oblong groove 3 is axially formed in the small diameter pipe 2, and one end part of a plate-like or linear spring member 4 of the width or thickness insertable into the oblong groove 3 is rigidly fixed onto the peripheral surface of the small diameter pipe 2, in the rear end side position of the oblong groove 3. A curved part 6 curved outward of the small diameter pipe 2 from the fixed part is formed at the spring member 4, and an engaging protruding part 7 protruding outward of the small diameter pipe 2 is provided at the tip part of the curved part 6. It is so formed that the curved part 6 and the engaging protruding part 7 can be protruded/retreated outside/inside of the small diameter pipe 2 through the oblong groove 3. In the large diameter pipe 1, an engaging hole 9 with which the engaging protruding part 7 can be engaged is formed at the tip.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, in connection of a pipe, a female screw is generally formed on the inner peripheral surface of the connecting side end of one pipe, and a male screw is formed on the outer peripheral surface of the connecting side end of the other pipe. There are known types in which the female thread of the pipe and the male thread of the other pipe are screwed together for connection, and a type in which a male thread is formed on the outer peripheral surface of the connection side end of both pipes and a nut is used for connection. ing.

[0003]

According to the above-mentioned conventional pipe connecting mechanism, it is necessary to turn the screw for connecting and disconnecting the pipe, which is troublesome.

In view of the above points, the present invention provides a pipe connecting mechanism for the purpose of easily connecting and disconnecting by a simple operation.

[0005]

In order to achieve the above object, the present invention is a pipe connecting mechanism for connecting a large-diameter pipe and a small-diameter pipe that can be fitted together, wherein a long groove is formed in the small-diameter pipe in the axial direction. Then, one end of a plate-shaped or linear spring member having a width or thickness that can be inserted into the long groove is fixed on the outer peripheral surface of the small-diameter pipe, and fixed to the spring member. Forming a bending portion that bends outward from the small-diameter pipe from the fixed portion, and providing an engaging protrusion that protrudes outward of the small-diameter pipe at the tip of the bending portion, and connecting the bending portion and the engaging protrusion to each other. The small-diameter pipe is configured to be freely retractable into and out of the small-diameter pipe through the long groove, and the large-diameter pipe is provided with an engagement hole formed at the tip thereof so that the engagement protrusion can be engaged with the engagement hole.

[0006]

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

In this state, the small-diameter pipe is inserted into the tip 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 tip of the large-diameter pipe. When the engagement projection is aligned with the engagement hole, the engagement protrusion engages with the engagement hole due to the restoring force of the spring member, thereby connecting the large diameter pipe and the small diameter pipe.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. 1 to 4 show an embodiment of the present invention, in which 1 is a large-diameter pipe, and 2 is a small-diameter pipe that can be fitted into the tip opening of the large-diameter pipe 1. A long groove 3 is formed in the axial direction on the tip end side of the small diameter pipe 2. Reference numeral 4 is a plate-shaped or linear spring member having a width or thickness that can be inserted into the long groove 3, and is arranged on the outer peripheral surface of the small diameter pipe 2 so as to overlap the long groove 3, and one end portion of the long groove 3 is provided. It is fixed to the rear end side by a stopper 5.

The spring member 4 is formed with a bending portion 6 that bends outward from the small diameter pipe 2 from the fixed portion, and a tip portion of the bending portion 6 projects outward from the small diameter pipe 2. The engaging projection 7 is provided. The curved portion 6 and the engaging protrusion 7 can be retracted into and out of the small diameter pipe 2 through the long groove 3, and normally, the curved portion 6 and the engaging protrusion 7 are outward from the outer peripheral surface of the small diameter pipe 2. In the protruding state (FIG. 2), the curved portion 6 resists the elastic force and the long groove 3 of the small diameter pipe 2
By pushing inward, the curved portion 6 and the engaging projection 7 are set to be retracted into the small diameter pipe 2 through the long groove 3 (FIG. 3).

2 and 6 for the engaging projection 7.
As in the embodiment shown in FIG. 5, the tip 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 tip portion of the engaging projection 7 is extended and folded back to form the inclined portion 8 which is inclined in the tip direction. On the other hand, in the large-diameter pipe 1, the engaging projection 9 is engageable with the engaging hole 9 at the tip 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 small-diameter pipe 2 is formed by forming the curved portion 6 of the spring member 4 whose one end is fixed to the outer periphery of the small-diameter pipe 2 by the elastic force of the spring member 4. By pressing inwardly of the long groove 2 of No. 2, the bending portion 6 and the engaging projection 7 provided at the tip of the bending portion 6 are sunk into the small diameter pipe 2 through the long groove 3.

In this state, the engagement hole 9 of the large-diameter pipe 1 and the long groove 3 of the small-diameter pipe 2 are on the same line, and then the small-diameter pipe 2 is fitted into the large-diameter pipe 1 to form a large-diameter pipe. When the inner peripheral surface of the diameter pipe 1 reaches above the engagement protrusion 7 that is recessed in the small diameter pipe 2, the pressing of the bending portion 6 is released. As a result, the engagement protrusion 7 elastically contacts the inner peripheral surface of the large diameter pipe 1 by the elastic 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 engagement protrusion 7 slides on the inner peripheral surface of the large diameter pipe 1, and the engagement protrusion 7 and the large diameter pipe 1 When the engaging hole 7 formed in 1 is aligned with the engaging hole 9,
The large-diameter pipe 1 and the small-diameter pipe 2 are connected to each other by engaging the engaging hole 9 by the elastic force of.

When the large-diameter pipe 1 and the small-diameter pipe 2 connected as described above are separated from each other, the curved portion 6 of the spring member 4 is pressed to retract the engaging projection 7 into the small-diameter pipe 2. Let As a result, the engagement protrusion 7 is disengaged from the engagement hole 9 of the large-diameter pipe 1, and in this state, the small-diameter pipe 2 is pulled out from the large-diameter pipe 1 to separate the large-diameter pipe 1 and the small-diameter pipe 2. It

Further, as in the embodiment shown in FIG. 6, if the tip portion of the engaging projection 7 is extended and folded back to form the inclined portion 8 which is inclined in the tip direction, the large diameter pipe 1 and the small diameter pipe are formed. 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 in the tip of the large-diameter pipe 1 and is retracted into the small-diameter pipe 2, whereby the engaging projection 7 and the curved portion 6 are formed. Is immersed in the small diameter pipe 2, and the large diameter pipe 1 and the small diameter pipe 2
It enables connection with (Fig. 7). Even in the case of separation, the large-diameter pipe 1 is further pushed into the small-diameter pipe 2 without pressing the curved portion 6, so that the inclined portion 8 is pushed at the end of the engagement hole 9 of the large-diameter pipe 1. As a result, the inclined portion 8 slides into the small-diameter pipe 2 while sliding on the end portion of the engagement hole 9, whereby the engagement projection 7 is disengaged from the engagement hole 9,
The large-diameter pipe 1 and the small-diameter pipe 2 can be separated (FIG. 8), and in this state, the small-diameter pipe 2 is rotated with respect to the large-diameter pipe 1 to shift the positions of the engagement hole 9 and the long groove 3, and then the large-diameter pipe 1 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. In this way, the large diameter pipe 1 and the small diameter pipe 2 can be connected / disconnected with one touch.

[0016]

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

[Brief description of 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.

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

FIG. 5 is a sectional view showing another embodiment.

FIG. 6 is a cross-sectional view showing another embodiment.

7 is a cross-sectional view showing a process of connection of the embodiment shown in FIG.

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

[Explanation of symbols]

 1 Large Diameter Pipe 2 Small Diameter Pipe 3 Long Groove 4 Spring Member 5 Stopper 6 Curved Part 7 Engagement Projection 8 Inclination 9 Engagement Hole

Claims (1)

[Claims] 1. A pipe connecting mechanism for connecting a large-diameter pipe and a small-diameter pipe that can be fitted together, 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-shaped or linear spring member having a width or a thickness that can be inserted into the long groove is fixed to the end side, and the spring member is curved outward from the small-diameter pipe from the fixed portion. An engaging protrusion that protrudes outward of the small diameter pipe is formed at the tip of the bending portion while forming the bending portion, and the bending portion and the engaging protrusion can be freely retracted into and out of the small diameter pipe through a long groove.
Further, in the large-diameter pipe, a connecting mechanism for a pipe is characterized in that an engaging hole into which the engaging protrusion is engageable is formed at a tip end portion thereof.