JP4414850B2 - Locking piece - Google Patents

Description

  The present invention relates to a clip that is attached to a connection part of connection pipes used in the interior of a water heater or the like and is attached to the clip in order to prevent the clip from being detached from the connection part. It is about a stop piece.

When connecting and connecting connecting pipes, as shown in FIGS. 14 and 15, flanges 101 and 201 are respectively provided at the ends of the connecting pipes 100 and 200 to form a connecting part 300, and this connecting part One-touch connection is performed by fitting a clip 400 to 300.
As shown in FIG. 16, the clip 400 is formed by bending a single band-shaped metal member, so that a tube insertion portion 401 formed in the center and an opening 402 for mounting to the connection portion 300 are formed. Are formed with opening pieces 403 and 404 and window portions 405 and 406 that are formed on both side surfaces of the clip and into which the flange portions 101 and 201 of the connection pipes 100 and 200 are fitted. It has elasticity.

That is, when connecting the connecting pipes using the clip 400, the flange portions 101, 201 of the connecting pipes are brought into contact with each other, and the tip 102 of one of the connecting pipes 100 is fitted into the mating connecting pipe 200. And join. The sealing between both connecting pipes is performed by an O-ring 103 that is externally fitted to the distal end portion 102 of the connecting pipe 100.
Next, the clip 400 is prepared, and the flange 101 and a part of the flange part 201 are fitted to the window parts 405 and 406 so as to straddle the connection part 300 of the connection pipes 100 and 200 from the opening 402 side. By attaching, connection pipes are prevented from coming off.

  However, according to the connection structure using the clip 400, when an external force is applied to the clip 400 from the lower side of the drawing (the direction of the opening 402), the clip 400 may easily fall off. If such a drop occurs, the connection pipes are disconnected from each other, so that the fluid in the connection pipe leaks.

Then, in order to ensure the fixation of the clip 400 to the connection part 300 between connection pipes, a retaining cover 500 for a pipe connection clip mounted on the opening side of the clip 400 has been proposed (Patent Document 1).
JP-A-8-28770

  As shown by a dotted line in FIG. 15, the retaining cover 500 includes a cover main body portion 501 formed at a position straddling the opening pieces 403 and 404 located on the opening 402 side of the clip 400, and the cover main body portion. The expansion preventing walls 502 and 502 formed on both ends of the opening 501 and bonded to the outer surface of the opening pieces so that the opening pieces do not open to the outside, and the flanges of the bonding portion 300 provided at the center position of the cover main body 501. An abutting portion 503 joined to the outer peripheral surface is provided.

  When the retaining cover 500 having the above-described structure is used for the clip 400, the clip 400 is mounted so that the opening pieces do not open across the opening pieces 403 and 404, so that the opening pieces of the clip 400 do not spread. Can be prevented from falling off from the connecting portion 300.

  However, according to the retaining cover 500 having the above-described structure, the effect is limited to preventing the clip 400 from falling off from the connecting portion 300, and the clip 400 does not exhibit the effects such as durability (strength reinforcement). There wasn't.

That is, the clip 400 has sufficient durability (strength) because the force to separate the flange portion 101.201 joined by the internal pressure generated by the behavior (static or dynamic) of the fluid flowing inside the tube repeatedly acts. ) Is required.
However, since the clip 400 cannot fix (cover) the connecting portion 300 (flange 101, 201) between the opening pieces, the strength becomes insufficient, and the windows 405, 406 near the opening pieces of the clip 400 have a high load. This causes a possibility that the clip 400 is broken and deteriorates durability.

  The present invention has been made in view of the above circumstances, and is a locking piece for retaining a clip attached to a connecting portion between connecting pipes, and provides a structure capable of improving the durability of the clip. The purpose is that.

In order to achieve the above object, the invention according to claim 1 is a retaining device in which connecting pipes 100 and 200 each having a flange portion are joined together to form a connecting portion 300 and opening pieces 403 and 404 are formed at both ends. For the pipe connection structure in which the clip 400 is attached to the connecting portion 300 and a part of the flange portions in the connecting portion is inserted into the window portions 405 and 406 provided in the clip 400, the following configuration is provided. The locking piece 1 is integrally formed of a metal piece so as to be included.
It has the 1st fixing | fixed part 4 fixed to one opening piece of the said clip 400. FIG.
It has the 2nd fixing | fixed part 5 which has a surface contact | abutted on the outer surface of the other opening piece.
The first fixing portion 4 and the second fixing portion 5 are connected to each other, and the arc-shaped portion 3 is formed with a long hole portion 2 into which a part of the connection portion is fitted.

  According to a second aspect of the present invention, in the locking piece 1 of the first aspect, the first fixing portion 4 is inserted into an opening 405a (window portion 405) formed in the opening piece 403 and contacts the outer surface of the opening piece. The second fixing portion 5 includes an engaging portion 42a that is inserted into an opening 406a (window portion 406) formed in the opening piece 404 and contacts the outer surface of the opening piece. The engaging portions are connected to each other by an arc-shaped portion 3 that is convex on the inside of the clip.

  According to a third aspect of the present invention, in the locking piece 1 according to the first aspect, the first fixing portion 4 is composed of a U-shaped fixing portion (a U-shaped portion 43) capable of covering the tip of the opening piece. The fixing portion 5 includes an engaging portion (rectangular piece 52) that is inserted into the opening formed in the opening piece and comes into contact with the outer surface of the opening piece, and has an arcuate shape that protrudes outward from the clip. 3, the U-shaped portion 43 and the locking portion (the square piece 52 via the bent piece 51) are connected.

  According to a fourth aspect of the present invention, in the locking piece 1 according to the first aspect, the first fixing portion 4 is a protrusion that supports the outer surface of the opening piece in the hole portion (square hole 48) into which the opening piece tip is inserted. 49, and the second fixing part 5 is a latch that comes into contact with the outer surface of the opening piece by forming a hole (through hole 2a) through which the opening piece passes. It has a surface (bending piece 53), and the fixing piece 47 and the locking surface (bending piece 53) are connected to each other by an arcuate portion 3 that protrudes outward from the clip.

According to the present invention, the arc-shaped portion 3 that connects the first fixing portion 4 and the second fixing portion 5 is formed integrally with the metal piece, so that the first opening piece of the clip 400 has the first opening piece. It is possible to mount the clip so that the opening pieces of the clip do not spread by the second fixing part coming into contact with the outer surface of the other opening piece.
Further, since the connecting portion 300 (flange 101.201) between the opening pieces of the clip 400 is fitted into the long hole portion 2 provided in the arc-shaped portion 3, the clip 400 can be firmly fixed around the connecting portion 300. The durability of the clip 400 can be improved.

  Furthermore, by making the arc-shaped portion 3 convex toward the inside or the outside of the clip 400, the elastic force can be effectively exhibited and the fitting to the connecting portion 300 can be ensured.

  A locking piece as an example of an embodiment of the present invention will be described with reference to FIGS. 1 to 5. 1 to 3 show a perspective explanatory view, a front explanatory view, and a back explanatory view of a locking piece, respectively. FIG. 4 shows a state in which the locking piece is attached to the clip attached to the connecting portion between the connecting pipes.

The locking piece 1 is integrally formed by deforming a metal piece by press working, and an arc-shaped portion 3 having a long hole portion 2 formed in the center, and both end positions of the arc-shaped portion 3. It has the formed 1st fixing | fixed part 4 and the 2nd fixing | fixed part 5, and is comprised by the left-right symmetric shape.
The first fixing part 4 and the second fixing part 5 are provided with a rectangular part 42 having a narrow width at the center part of a bent part 41 continuously bent at a right angle to the end part of the arcuate part 3. The front end portion of the rectangular portion 42 is bent outward so as to be substantially perpendicular to the opposite side, thereby forming a locking portion 42a. As shown in FIG. 3, the tips of the locking portions 42a are each formed in an arc shape.

Moreover, the arc-shaped part 3 is comprised so that it may become convex in the direction in which the 1st fixing | fixed part 4 and the 2nd fixing | fixed part 5 are bent. This is because when the clip 400 is mounted, the arc-shaped portion 3 is positioned so as to be convex on the inner side of the clip 400, and the elastic force is effectively exhibited to fit the elongated hole portion 2 to the connection portion 300. This is to make sure.
Further, the bent portions of the first fixing portion 4 and the second fixing portion 5 are bent in a substantially right angle direction while drawing a gentle arc.

Then, the usage procedure of the locking piece of the said structure is demonstrated.
In the same manner as described in the background art, a connection portion 300 is formed in which the flange portions of the connection tubes are brought into contact with each other, and the distal end portion 102 of one connection tube 100 is fitted into the counterpart connection tube 200. It joins and it is made to attach so that the window parts 405 and 406 of the clip 400 may fit in the connection part 300 which is a flange contact part (FIG. 14, FIG. 15).

First, the engaging portion 42a of the rectangular portion 42 of the second fixing portion 5 is hooked to the end of the opening portion 405a continuous with the window portion 405 of the one opening piece 403 of the clip 400, and the rectangular portion is formed on the outer surface of the opening piece 403. 42 (locking portion 42a) is positioned so that the inner surface contacts. At this time, the clip 400 is positioned so that the outer surface of the first fixing portion 4 of the locking piece 1 contacts the inner surface of the other opening piece 404 of the clip 400 (FIG. 5).
Next, in this state, by pushing the bent portion 4 a of the first fixing portion 4, the square portion 42 at the tip end is fitted to the end of the opening portion 406 a of the opening piece 404, and the square portion 42 is formed on the outer surface of the opening piece 404. The inner surface (locking portion 42a) of the locking plate comes into contact with the clip 400 and the locking piece 1 is fixed to the clip 400 (FIG. 4).

In the state shown in FIG. 4, since the periphery of the connection portion 300 where the flange portions are in contact with each other is surrounded and fixed by the clip 400 and the locking piece 1, the clip 400 is firmly fixed to the connection portion 300. And durability can be improved.
Further, although the arc-shaped portion 3 is in a slightly expanded state, the locking piece 1 has the arc-shaped portion 3 and has an elastic force, so that the restoring force always fits the opening piece (see FIG. Therefore, even if an external force is applied to the clip 400 or the locking piece 1, it does not come off easily.

  Next, a locking piece as another example of the embodiment will be described with reference to FIGS. FIGS. 6 to 8 show a perspective explanatory view, a front explanatory view, and a plan explanatory view of the locking piece, respectively, and the following description will focus on the parts different in configuration from the locking pieces shown in FIGS. 1 to 3. To do.

  As in FIG. 1, the locking piece 1 is integrally formed by deforming a metal piece by pressing, and an arc-shaped portion 1 having a long hole portion 2 formed at the center, and the arc-shaped portion 1. The first fixing part 4 and the second fixing part 5 are formed respectively at both end positions, but the first fixing part 4 and the second fixing part 5 have different structures. .

  That is, the first fixing portion 4 is formed to have a U-shaped portion 43 that is bent at an angle of about 120 degrees with respect to the arc-shaped portion 2 and covers the opening piece of the clip 400 at the tip. Further, a rectangular cut portion 44 in which only the lower side is connected to the end portion of the outer surface forming the U-shaped portion 43 is formed, and the end portion is bent outward with the lower side from the cut portion 44 inward. A claw portion 45 is formed.

  The second fixing portion 5 includes a bent piece 51 bent at an angle of about 120 degrees with respect to the arc-shaped portion 2, and an engaging portion formed by bending the angle formed with respect to the bent piece 51 at about 100 degrees. And a rectangular piece 52. The bent piece 51 and the rectangular piece 52 are formed so that the front end side is narrower than the middle of the bent piece 51. The curve of the arc-shaped portion 3 has a curvature along the outer periphery of the flange of the connection pipe 100 or 200 to which the clip 400 is attached.

Then, the usage procedure of the locking piece of the said structure is demonstrated.
As in the case of the locking piece 1 of FIG. 2 is inserted and positioned so that the inner surface (locking portion) of the square piece 52 abuts the outer surface of the opening piece 403. At this time, the first fixing portion 4 of the locking piece 1 is positioned so as to cover the other opening piece 404 in the clip 400 (FIG. 10).
Next, by pressing the U-shaped portion 43 of the first fixing portion 4 in this state, the opening piece 404 is fitted and positioned in the U-shaped portion 43, and the claw portion 45 is placed on the outer surface of the opening piece 404. Then, the locking piece 1 is fixed to the clip 400 (FIG. 9).

  In the state shown in FIG. 9, since the periphery of the connection portion 300 where the flange portions abut each other is surrounded and fixed by the clip 400 and the locking piece 1, the clip 400 is firmly fixed to the connection portion 300. And durability can be improved. Further, although the arc-shaped portion 3 is in a slightly expanded state, the locking piece 1 formed with the arc-shaped portion 3 has an elastic force, so that the restoring force always fits the opening piece (see FIG. 9 works upward), and even when an external force is applied to the clip 400 or the locking piece 1, it does not easily come off.

  Next, a locking piece as another example of the embodiment will be described with reference to FIGS. 11 to 13. FIG. 11 to FIG. 13 show a front explanatory view and a plan explanatory view of the locking piece, respectively, and the following description will focus on portions that are different in configuration from the locking piece shown in FIG. 1 to FIG.

  As in FIG. 1, the locking piece 1 is integrally formed by deforming a metal piece by pressing, and an arc-shaped portion 3 having a long hole portion 2 formed at the center, and the arc-shaped portion 3. The first fixing portion 4 and the second fixing portion 5 are respectively formed at both end positions, but the first fixing portion 4 and the second fixing portion 5 are configured in different structures. .

  That is, the first fixing portion 4 has a bent piece 46 bent at an angle of about 100 degrees with respect to the arc-shaped portion 3 and a fixing piece 47 connected to the bent piece 46 and bent at a substantially right angle. Is formed. A square hole 48 is formed in the fixed piece 47, and a protruding portion 49 that is convex inward is formed at an outer position in the square hole 48.

  The second fixing portion 5 is composed of a bent piece 53 bent substantially at a right angle with respect to the arc-shaped portion 3, and a hole 2 a continuous with the long hole portion 2 is formed. A through-hole 2b through which the opening piece of the clip 1 can be disposed is formed at 53 bent portions. The curve of the arcuate portion 3 has a curvature along the outer periphery of the flange.

Then, the usage procedure of the locking piece of the said structure is demonstrated.
As in the case of the locking piece 1 in FIG. 1, after forming the connection portion 300 in which the flange portions of the connection pipes are brought into contact with each other, one opening piece 403 of the clip 400 is disposed to penetrate the through hole 2 b. It is positioned so that the lower surface (locking surface) of the bent piece 53 contacts the outer surface.
Next, in this state, the other opening piece 404 is positioned in the square hole 48 of the first fixing portion 4, and the protruding portion 409 abuts on the outer surface of the opening piece 404, so that the locking piece 1 is fixed to the clip 400. Is fixed (FIG. 13).

  In the state shown in FIG. 13, since the periphery of the flange portion is surrounded and fixed by the clip 400 and the locking piece 1, the clip 400 can be firmly fixed to the connection portion 300, and the durability can be improved. Can be planned. Further, although the arc-shaped portion 3 is in a slightly expanded state, the locking piece 1 has an elastic force by being provided with the arc-shaped portion 3, so that the restoring force always fits the opening piece ( Since it works in the upward direction in FIG. 13, even if an external force is applied to the clip 400 or the locking piece 1, it does not easily come off.

It is a perspective explanatory view of a locking piece of an example of an embodiment of the invention. It is front explanatory drawing of the locking piece of FIG. It is back surface explanatory drawing of the locking piece of FIG. FIG. 2 is a cross-sectional explanatory view showing a state where the locking piece of FIG. 1 is attached to a pipe connecting portion. It is a partial cross section explanatory view which shows the state just before mounting | wearing the latching piece of FIG. 1 to a pipe connection part. It is an isometric view explanatory drawing of the locking piece which shows an example of the other form of this invention. It is front explanatory drawing of the locking piece of FIG. FIG. 7 is an explanatory plan view of the locking piece of FIG. 6. FIG. 7 is an explanatory cross-sectional view showing a state in which the locking piece of FIG. 6 is attached to the pipe connecting portion. It is a partial cross section explanatory view which shows the state immediately before mounting | wearing the latching piece of FIG. 6 to a pipe connection part. It is an isometric view explanatory drawing of the locking piece which shows an example of the other form of this invention. It is front explanatory drawing of the locking piece of FIG. FIG. 12 is a cross-sectional explanatory view showing a state where the locking piece of FIG. 11 is attached to the pipe connecting portion. It is side surface explanatory drawing which shows the state which joins connection pipes. It is an isometric view explanatory drawing of the clip with which a pipe connection part is mounted | worn. It is a perspective explanatory view showing a state where a retaining cover is attached to a clip attached to a connection part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Locking piece 2 Long hole part 2b Through-hole 3 Arc-shaped part 4 1st fixing | fixed part 5 2nd fixing | fixed part 41 Bending part 42 Rectangular part 42a Locking part 43 U-shaped part 45 Claw part 46 Bending piece 47 Fixed piece 48 Square hole 49 Projection part 51 Bending piece 52 Square piece 53 Bending piece 100 Connecting pipe 200 Connecting pipe 300 Connecting part 400 Clip 403 Opening piece 404 Opening piece 405 Window part 406 Window part

Claims (4)

Connecting pipes each having a flange formed thereon are joined together to form a connecting part, and a clip for securing with opening pieces formed at both ends is attached to the connecting part, and the connection is made to the window provided in the clip. For the pipe connection structure in which a part of the flange parts in the part is inserted,
A first fixing portion fixed to one opening piece of the clip;
A second fixing portion having a surface that contacts the outer surface of the other opening piece;
The first fixed portion and the second fixed portion are connected to each other, and an arc-shaped portion having a hole portion into which a part of the connecting portion is fitted is formed integrally with a metal piece. A locking piece. The first fixing portion includes an engaging portion that is inserted into the opening formed in the opening piece and contacts the outer surface of the opening piece,
The second fixing portion includes an engaging portion that is inserted into the opening formed in the opening piece and contacts the outer surface of the opening piece,
The locking piece according to claim 1, wherein the locking surfaces are connected to each other by an arcuate portion that is convex inside the clip. The first fixing part comprises a U-shaped fixing part capable of covering the tip of the opening piece,
The second fixing portion includes an engaging portion that is inserted into the opening formed in the opening piece and contacts the outer surface of the opening piece,
The locking piece according to claim 1, wherein the U-shaped fixing portion and the locking portion are connected by an arc-shaped portion that protrudes outward from the clip. The first fixing portion includes a fixing piece provided with a protrusion that supports an outer surface of the opening piece in a hole portion into which the opening piece tip is inserted.
The second fixing portion includes a locking surface that comes into contact with an outer surface of the opening piece by forming a hole through which the opening piece passes,
The locking piece according to claim 1, wherein the fitting portion and the locking portion are connected by an arc-shaped portion that protrudes outward from the clip.

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