JP2014132184A - Connecting mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that, in a conventional connecting mechanism, a protrusion of one piping is inserted into an engagement part at the other piping side, and it is required to insert a pin into the engagement part while keeping the inserted state, thus causing the complication of connecting work, and furthermore, since the pin can be inserted into the engagement part even in a state that the protrusion does not reach a pin insertion position in an incomplete insertion state of the protrusion, it is difficult to detect an incomplete connecting state.SOLUTION: Holes for pin insertion formed at the engagement part are formed in one pair at right and left, both of the holes are formed so as to be oblong and expanded in a truncated chevron in the insertion direction of the protrusion, the pin is pushed to the protrusion and moved in the hole when the protrusion is inserted into the engagement part in a state that the pin is inserted into each hole, and a gap between the pins is expanded, and after the protrusion passes the gap between the pins, the pin wraps around the back face side of the protrusion.

Description

  The present invention relates to a connecting mechanism that connects two pipes to each other.

  As a conventional connecting mechanism of this type, for example, a flange-like convex portion is formed at the end of one of two pipes, and this convex portion is inserted into the end of the other pipe. A joint is provided. Then, with the convex portion inserted into the engaging portion, a U-shaped pin is inserted into the engaging portion, and the convex portion of one pipe is caught on this pin so that the convex portion does not come out of the engaging portion. Is known (for example, see Patent Document 1).

JP 2006-161821 (paragraphs 0013 and 0014, FIG. 4)

  In the conventional coupling mechanism described in Patent Document 1, the convex portion of one pipe must be inserted into the engaging part on the other pipe side, and the pin must be inserted into the engaging part while maintaining the inserted state. The connection work becomes complicated. Further, since the pin can be inserted into the engaging portion even when the convex portion is not completely inserted and the convex portion has not reached the pin insertion position, it is difficult to detect the incomplete connection state.

  In view of the above problems, an object of the present invention is to provide a connection mechanism that can easily perform a connection operation and that can easily confirm the completion of the connection.

  In order to solve the above-mentioned problem, the connecting mechanism according to the present invention is a connecting structure for connecting two pipes at the ends of one pipe, and forms a flange-like convex part at the end of one pipe and the other. An engagement part into which the convex part is inserted is provided at the end of the pipe, and the U-shaped pin inserted into the engagement part engages with the convex part with the convex part inserted into the engagement part. Thus, in the connection structure in which the convex portion does not come out from the engaging portion, the holes for inserting the pins formed in the engaging portion are provided in a pair of left and right, and both the holes are oblong holes and the convex portion Formed diagonally so as to expand in the shape of a letter along the insertion direction, and when the convex portion is inserted into the engaging portion with the pin inserted into each of the holes, the pin is pushed by the convex portion and moves in the hole The distance between both pins is widened by, and after the convex part passes between both pins, the pin goes around the back side of the convex part. And features.

  In the above configuration, since the pin is set in the engaging portion in advance, the engagement is completed only by inserting the convex portion of one pipe into the engaging portion. At that time, the pin moves while expanding along the elongated hole-shaped hole, and when the convex portion is completely inserted into the engaging portion, the pin returns to the original state, so that the completion of the engagement can be easily confirmed. . Even if one of the pipes is pulled out from the state, the pin tends to move inward along the hole, so that the one pipe can be reliably prevented from coming off.

  Both pins are parallel to each other, and an elastically deforming portion is provided to connect one end of both pins, and both pins are urged inward by the elastically deforming portion with both pins inserted into the holes. You may be made to do.

  As is clear from the above description, the present invention can be easily engaged because the engagement is completed simply by inserting the convex portion of one pipe into the engaging portion, and the convex portion is completely engaged. When inserted into the unit, the pin returns to its original state, so it is easy to confirm the completion of the connection.

The figure which shows the structure of one embodiment of this invention Perspective view showing pin shape III-III sectional view of the completed connection III-III cross section at the start of connection III-III sectional view in the middle of connection

  Referring to FIG. 1, the connection structure according to the present invention connects one pipe 1 and the other pipe 2 so that the connection between the two is not released by a pin 4. An engaging portion 3 is provided at the end of the other pipe 2, and a pin 4 is inserted into a pair of holes 31 formed in the engaging portion 3.

  With reference to FIG. 2, the pin 4 is provided with a pair of linear insertion portions 41 to be inserted into the holes 31. Both insertion portions 41 are parallel to each other, and one end portions 41a of both insertion portions 41 are connected to each other via an elastic deformation portion 42, and are formed in a U shape as a whole. This elastic deformation part 42 functions as a torsion spring, and the distance between both insertion parts 41 is set to be narrower than the distance between both holes 31 in the natural state. Therefore, when inserting the insertion portion 41 into the hole 31, the insertion portion 41 is inserted with the gap between the insertion portions 41 slightly widened. In the present invention, the insertion portion 41 is inserted into the hole 31 of the engagement portion 3 in advance before inserting the end portion of one pipe 1 into the engagement portion 3. In the present embodiment, the distance between both insertion portions 41 is set to be narrower than the distance between both holes 31, but both may be set to the same length.

  Referring to FIG. 3, a flange-like convex portion 11 is formed at the end of one pipe 1, and when both pipes 1 and 2 are securely connected, as shown in FIG. Even if the portion 41 wraps around the back side of the convex portion 11 and one pipe 1 is pulled away from the other pipe 2 in this state, the convex portion 11 is caught by the insertion portion 41 and the convex portion 11 becomes the engaging portion 3. It is configured not to come off. In addition, the hole 31 of the engaging part 3 was formed obliquely so as to expand in a C shape along the insertion direction of the convex part 11. Therefore, when the convex portion 11 tries to come out of the engaging portion 3, the convex portion 11 presses the insertion portion 41, so that the interval between the both insertion portions 41 is reduced, so that the insertion portion 41 does not escape outward. . Reference numeral 12 denotes an annular seal member such as an O-ring.

  With reference to FIG. 4, this figure has shown the state which inserted one piping 1 in the engaging part 3, and started the connection operation | work. In this state, the front surface 11a of the convex portion 11 is in contact with the insertion portion 41. When the convex portion 11 is inserted into the engaging portion 3 from this state, the front surface 11a of the convex portion 11 pushes the insertion portion 41. become.

  On the other hand, since the hole 31 into which the insertion part 41 is inserted is provided with an inclination as described above, when the insertion part 41 is pushed, the insertion part 41 moves backward along the hole 31 while moving backward. To go. When the convex portion 11 is pushed up to the state shown in FIG. 5, the insertion portion 41 moves to the edge of the front surface 11 a of the convex portion 11. When the convex portion 11 is further pushed forward, the insertion portion 41 comes off the front surface 11a of the convex portion 11 and comes into contact with the side surface 11b. Since the insertion portion 41 is urged inward by the urging force of the elastic deformation portion 42, the insertion portion 41 maintains a state of being in contact with the side surface 11b. And if the convex part 11 advances further and the insertion part 41 remove | deviates from the side surface 11b, the insertion part 41 will move inside by the urging | biasing force of the elastic deformation part 42, will be in the state shown in the said FIG. , 2 is completed.

  When releasing the connection, the insertion portion 41 may be extracted from the hole 31 by holding the elastic deformation portion 42 of the pin 4. Then, the convex part 11 can come out of the engaging part 3 as it is.

  In addition, this invention is not limited to an above-described form, You may add a various change in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 1 (One) piping 2 (Other) piping 3 Engagement part 4 Pin 11 Protrusion part 11a Front surface 11b Side surface 31 Hole 41 Insertion part 41a One end part 42 Elastic deformation part

Claims (2)

  A connection structure in which two pipes are connected to each other at the end, and a flange-like protrusion is formed at the end of one pipe, and the protrusion is inserted into the end of the other pipe. With the joint part provided, the U-shaped pin inserted into the engagement part is engaged with the projection part so that the projection part does not come out from the engagement part with the projection part inserted into the engagement part. In the connecting structure, the pin insertion holes formed in the engaging portion are provided in a pair on the left and right sides, and both the holes are oblong holes so as to expand in the shape of a letter C along the insertion direction of the convex portion. When the convex part is inserted into the engaging part with the pin inserted into each of the holes, the pin is pushed by the convex part and moved in the hole, so that the distance between the two pins is increased and the convex part is projected between the two pins. A coupling mechanism characterized in that after the portion passes, the pin turns around to the back side of the convex portion.   Both pins are parallel to each other, and an elastically deformable portion is provided to connect one end of both pins, and both pins are urged inward by the elastically deformable portion in a state where both pins are respectively inserted into the holes. The connection mechanism according to claim 1, wherein the connection mechanism is configured as described above.

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