JPWO2016098724A1 - Quick fastener removal prevention device - Google Patents

Abstract

Provided is a quick fastener detachment prevention device capable of preventing an accident in which connecting pipes are detached due to a quick fastener falling off, and for leaving the detachment of a quick fastener as plastic deformation on a detachment prevention member. The quick fastener 1 is mounted in a state where the flanges 13 and 14 formed at the respective ends of the first and second pipes 11 and 12 are joined, and joined to the long window 4 applied to the quick fastener 1. A part of the flanges in a state of being inserted is inserted. The quick fastener 1 detachment preventing member 6 is folded in a U-shape so that the folding center portion 6a is located between the insertion guide portions 2b and 3b of the quick fastener 1 and a pair of folding leg portions following the bending center portion. 6d and 6e are engaged with the inner sides of the left and right bulging portions 2a and 3a of the quick fastener 1 through the long window 4 provided on the quick fastener 1, respectively.

Description

  The present invention relates to a quick fastener detachment preventing device used for maintaining a connected state of connecting pipes such as water pipes and hot water pipes.

Quick fasteners are used to maintain the connection state between the connecting pipes. That is, the quick fastener is mounted so as to straddle both flanges in a state where flange-shaped flanges formed at respective ends of pipes connected to each other are joined.
Thereby, the said flanges of the joined state are inserted in the long window given to the center part of the quick fastener, and it functions so as to prevent the connecting pipe from coming off.

In this quick fastener, a metal material formed in a strip shape is bent into, for example, a C shape, and a pair of insertion guide portions are formed opposite to the ends of both leg portions. The quick fastener is attached to the flange portion in the joined state. Therefore, when the force with which the quick fastener in the mounted state is pulled out in the direction opposite to the mounting direction is applied, the quick fastener is dropped from the joined flange portion, and the connecting pipes are detached.
For this reason, when using an above-mentioned quick fastener, generally the removal prevention member which prevents a pair of insertion guide part of a quick fastener from expanding is used together.

For example, a so-called binding band formed of a resin material is used as an anti-disengagement member that prevents the quick fastener insertion guide part from expanding. The binding band is mounted between the insertion guide parts facing the quick fastener. By doing so, it is possible to prevent the quick fastener from falling off.
However, the use of the binding band described above requires a complicated operation such as inserting the leading end of the band into the binding part, and is difficult to mount when the space between the parts is narrow, and the workability is poor. In addition, since an additional work for excising the surplus portion of the band is required, there are problems that a tool for excision is necessary and waste is always generated.

On the other hand, the structure shown in patent documents 1 and 2 is proposed as a detachment prevention member which prevents a quick fastener from detaching from a flange part.
According to the quick fastener detachment preventing device disclosed in Patent Document 1, a stopper (detachment preventing member) is formed of a flexible material such as polypropylene, and both ends of the stopper are open end portions of the quick fastener. A configuration is adopted in which the stopper is attached to the quick fastener by entering a clamping hole (long window) formed in (a pair of insertion guide portions).

Further, according to the quick fastener detachment preventing device disclosed in Patent Document 2, a fixture (detachment prevention member) is formed by, for example, injection molding, and a pair of insertion guides for the quick fastener is provided at both ends of the fixture. A groove portion is formed into which the portion can be inserted.
The pair of insertion guide portions of the quick fastener is inserted into the pair of insertion guide portions of the quick fastener by sliding the grooves formed at both ends of the fixture in the axial direction so that the pair of insertion guide portions of the quick fastener is The movement in both the opening direction and the closing direction is constrained.

JP 2014-156755 A Japanese Patent No. 5567902

By the way, according to the quick fastener detachment prevention device disclosed in Patent Document 1, both ends of the stopper (detachment prevention member) are sandwiched between the opening end portions (a pair of insertion guide portions) of the quick fastener. It is attached.
For this reason, at the moment when the opening end of the quick fastener is slightly opened, the stopper may be removed from the quick fastener, or may be dropped due to vibration caused by a water hammer.
According to this configuration, the function as a quick fastener detachment preventing device is insufficient, and the possibility that the quick fastener also falls off from the joint portion of the flange and the connecting pipes come off increases.

Moreover, according to the quick fastener detachment preventing device disclosed in Patent Document 2, each groove portion formed at both ends of the fixture by sliding the fixture (detachment prevention member) in the axial direction with respect to the quick fastener. Needs to be fitted into the pair of insertion guide portions of the quick fastener. Therefore, problems such as the need for fine alignment in the axial direction between the pair of insertion guide portions of the quick fastener and each groove portion formed in the fixture remain, and an improvement in mounting operation is desired. .
Also, in the quick fastener detachment preventing device disclosed in Patent Document 2, the fixture may be dropped due to vibration by a water hammer or the like.

On the other hand, this type of quick fastener is also frequently used in places where safety valves are installed. This safety valve may not function as a safety valve if its temperature adjustment part is removed once and the temperature setting may be changed and unexpected high temperature mixed water may be discharged. Cause.
Therefore, when a trouble occurs due to the removal of the quick fastener at the above-described safety valve installation location, management is required so that the history of removal can be identified.

  Therefore, the present invention can effectively prevent the disconnection preventing member attached to the quick fastener from falling off, and can prevent the connection pipes from coming off due to the quick fastener dropping off in advance. In addition, when an end user or the like tries to remove the quick fastener forcibly, the removal of the quick fastener can leave the fact as plastic deformation in the prevention member. It is an object of the present invention to provide a prevention device.

  The quick fastener detachment preventing device according to the present invention, which has been made to solve the above-mentioned problems, is formed with a flange-like flange protruding in the circumferential direction at each end of the first and second pipes, By attaching the quick fastener in a state where the flange is joined, a part of the joined flanges is inserted into the long window provided in the quick fastener, and the first and second pipes are inserted. A quick fastener detachment prevention device for preventing the detachment of the quick fastener, wherein the quick fastener is formed with bulging portions projecting outward on both legs formed by bending a strip-shaped material into an arc shape. In addition, an insertion guide portion is formed at the front ends of the both leg portions so as to expand outward in the shape of a letter C, and is attached to the quick fastener. The quick fastener detachment preventing member that prevents the insertion guide portion that expands in a letter C shape is folded in a U-shape, the folding center portion is located between the insertion guide portions, and continues to the folding center portion. The pair of bent legs are respectively engaged with the respective bulging portions through the long windows provided on the quick fasteners through both outer sides of the insertion guide portion.

  In this case, it is preferable that the long window provided on the quick fastener is formed so as to avoid the insertion guide portion.

  In addition, each of the pair of bent legs in the quick fastener detachment preventing member has a tip claw portion that is curved in a U-shape, and each pair of tip claw portions is formed on the quick fastener. It is possible to preferably employ a configuration engaged with each.

  The quick fastener disengagement prevention member is preferably formed in a strip shape from a material capable of plastic deformation.

  Furthermore, it is preferable that a bent portion is formed in the bent central portion so as to be recessed toward the bent leg portion.

According to the quick fastener detachment prevention device having the above-described configuration, the detachment prevention member to be attached to the quick fastener is bent in a U-shape, and a pair of bent legs following the center of the fold are formed on the left and right sides of the quick fastener. Each of the bulging portions is engaged with and attached to the inside.
Therefore, when a force is applied in the direction of pulling out the quick fastener, for example, the pair of insertion guide portions that expand in the shape of a letter of the quick fastener come into contact with the left and right bent portions formed on the disengagement prevention member, respectively. It acts to prevent the pair of insertion guide portions from being expanded. Accordingly, it is possible to provide a quick fastener detachment prevention device that can effectively prevent the quick fastener from falling off.

On the other hand, even if the quick fastener attached to the flange part is forcibly removed by applying a stronger force than expected, or when the removal prevention member is forcibly removed, The pair of insertion guide portions that expand in a shape are pulled in the direction of expanding the left and right bent portions formed on the disengagement preventing member, and give plastic deformation that breaks the shape of the bent portions.
This plastically deformed portion is not limited to the bent portion described above, but may be a deformation in which the tip claw portion extends, a bent leg portion, or a bent central portion.
Therefore, the fact that the quick fastener has been forcibly removed or the fact that it has attempted to be removed can be verified by the above-described deformation of the detachment preventing member.
In this way, it can contribute to the maintenance management of the facility, and can also contribute to suppressing intentional removal of the quick fastener.

Furthermore, by forming a bent portion in the bent central portion so as to be recessed in the direction of the bent leg, the detachment preventing member can be extended in the lateral direction.
As a result, the disengagement prevention member can follow the variation in the degree of opening of the insertion guide part caused by the dimensional variation within the range of the product quality of the quick fastener, and suppress the lateral glazing, thereby ensuring more reliability. Can be attached to.

It is a figure which shows the single unit of the quick fastener utilized for the quick fastener detachment | desorption prevention apparatus which concerns on this invention, Comprising: (a) is a front view, (b) is a side view, (c) is a bottom view, (d) is a bottom view. It is sectional drawing seen in the arrow direction from the AA line in (b). It is a figure which shows the single-piece | unit of the removal prevention member utilized similarly for the quick fastener removal prevention apparatus, Comprising: (a) is a front view, (b) is a side view, (c) is a perspective view. It is a perspective view which shows the state which attached the quick fastener and the removal prevention member to the joined flange part. It is the perspective view which changed the same line of sight. It is the side view similarly seen from the direction orthogonal to a pipe axis. It is a schematic diagram which shows the example which the detachment prevention member received plastic deformation. It is a schematic diagram which shows the other example which the detachment prevention member received plastic deformation. It is a schematic diagram which shows the further another example from which the detachment | prevention prevention member received plastic deformation. It is a figure which shows the 1st modification of the detachment prevention member shown in FIG. 2, Comprising: (a) is a front view which shows the single body of a detachment prevention member, (b) shows the deformation | transformation state of the state which attached the detachment prevention member. It is a front view. FIGS. 10A and 10B are diagrams illustrating a usage state of the detachment preventing member illustrated in FIG. 9, in which FIG. 9A is a diagram when the insertion guide portion is wide and FIG. 9B is a diagram when the insertion guide portion is small. It is a front view which shows the 2nd modification of the detachment prevention member shown in FIG.

Hereinafter, a quick fastener detachment preventing device according to the present invention will be described based on the embodiments shown in the drawings.
FIG. 1 shows a single structure of a quick fastener, and the basic structure of the quick fastener 1 is that a metal material formed in a strip shape is bent into an arc shape (C shape), and both legs are targeted to the left and right. Portions 2 and 3 are formed.

As shown in FIG. 1 (a), a bulging portion 1a is formed at the central portion bent in an arc shape (C shape) by being further bent in a U shape, and both the leg portions 2, 3 are formed. Are respectively formed with bulging portions 2a and 3a that are bent in a U-shape and project toward both outer sides.
Moreover, the front-end | tip part of both the said leg parts 2 and 3 comprises a pair of insertion guide part 2b, 3b which spreads outward in the shape of a C.

Further, as shown in the sectional view of FIG. 1 (d), the quick fastener 1 has tips (a shaded portion in FIG. 1 (d)) and a pair of insertion guides of the bulging portions 1a, 2a, 3a. A plurality of long windows 4 are formed along the center of the strip-shaped material at positions avoiding the portions 2b and 3b (shaded portions in FIG. 1 (d)).
In other words, the plurality of long windows 4 form an annular locus, and are inserted in a state in which flange-like flanges formed at respective ends of first and second pipes described later are joined. The function of preventing the first and second pipes from coming off is achieved.

FIG. 2 shows a quick fastener detachment preventing member 6 that is used by being attached to the quick fastener 1 shown in FIG.
The disengagement prevention member 6 functions to prevent the pair of insertion guide portions 2b and 3b expanding in the shape of the letter C of the quick fastener 1 described above, and is preferably slightly thin and preferably formed in a strip shape. Stainless steel (SUS) is bent into a U shape.
Further, if the stainless steel is made thicker, it becomes a stronger detachment preventing member, and the thickness of the stainless steel can be appropriately selected.

The bent central portion 6a of the disengagement preventing member 6 is slightly bent into a concave shape as shown in FIG. 2, and a pair of bent portions following the left and right bent portions 6b, 6c of the bent central portion 6a. The leg portions 6d and 6e are formed in a state of facing each other in parallel.
Furthermore, each front-end | tip part of a pair of bending leg parts 6d and 6e is curving in U shape toward the both outer sides, respectively, and forms front-end | tip claw parts 6f and 6g.

3 to 5 show a state in which the quick fastener 1 and the detachment preventing member 6 are used to prevent the connected first and second pipes from coming off.
3 to 5, the respective leading end portions of the first and second pipes connected to each other are cut out and described. In this example, for example, the above-described safety valve is provided inside the first pipe. (Not shown) is configured.

And the 1st piping shown with the code | symbol 11 comprises the hot water supply pipe downstream, and the hot water supply pipe | tube 12A and the temperature control part 12B are provided in the 2nd piping side shown with the code | symbol 12. FIG.
That is, the hot water supplied from the hot water supply pipe 12A passes through the safety valve (arranged in the downstream side of the illustrated first pipe 11) inside the first pipe and passes through the first pipe. For example, tap water from a water supply pipe (not shown) connected to the downstream side is mixed. And the mixed water of the hot water and tap water (the hot water whose temperature is set by the temperature adjusting portion 12B) is sent out to the downstream side of the first pipe.
As shown in FIGS. 3 and 4, a guide pipe 12a having a small diameter projects from the end of the second pipe 12, and this guide pipe 12a is the first pipe described above. 11, the connecting portions of the first and second pipes 11 and 12 are axially aligned.

A flange-like flange 13 protruding in the circumferential direction is integrally formed at the end of the first pipe 11. A flange-like flange 14 protruding in the circumferential direction is integrally formed at the end of the second pipe 12, and each flange 13 formed in each of the first and second pipes 11, 12 is formed. , 14 have substantially the same outer dimensions.
And the above-mentioned quick fastener 1 is mounted | worn with respect to the said flanges 13 and 14 of the joined state.

In this case, the insertion guide portions 2b and 3b, which are formed in the quick fastener 1 and expand in the shape of a letter H, are attached to the flanges 13 and 14 in a joined state from the direction orthogonal to the axial direction.
Thereby, the pair of insertion guide portions 2b and 3b are fitted along the circumferential direction of the flanges 13 and 14 while being expanded. At this time, a part of the joined flanges 13 and 14 is inserted into the long window 4 provided on the quick fastener 1 to prevent the first and second connecting pipes 11 and 12 from coming off. Installed.

  In this state, the quick fastener 1 is fitted with a detachment preventing member 6. In this case, the U-shaped tip claw portions 6f and 6g in the disengagement prevention member 6 are formed as shown in FIG. 4 with the left and right bulging portions 2a and 3a and the insertion guide portions 2b and 3b of the quick fastener 1. The U-shaped tip claws 6f and 6g are respectively engaged with the left and right bulging portions 2a and 3a of the quick fastener 1 respectively.

  Accordingly, as shown in FIGS. 3 and 4, the folding center portion 6 a of the disengagement prevention member 6 is positioned between the insertion guide portions 2 b and 3 b of the quick fastener 1, and the bending center portion 6 a A pair of bent leg portions 6d and 6e following the above are installed so as to pass through both outer sides of the insertion guide portions 2b and 3b of the quick fastener 1.

  As described above, in the state where the disengagement preventing member 6 is attached to the quick fastener 1, for example, even if a force is applied to the bulging portion 1a at the center of the quick fastener 1 in the pulling direction, A pair of insertion guide portions 2b and 3b extending in a letter shape abuts on the left and right bent portions 6b and 6c formed on the detachment preventing member 6, respectively.

And since the front-end | tip part of the right and left bending parts 6b and 6c is each engaged with the inner side of the right and left bulging parts 2a and 3a of the quick fastener 1, the left and right bending parts 6b and 6c expand more than predetermined. This prevents the pair of insertion guide portions 2b and 3b of the quick fastener 1 from being expanded more than a predetermined amount.
Therefore, the above-mentioned quick fastener 1 attached to the joints of the flanges 13 and 14 of the first and second pipes 11 and 12 can effectively prevent the disconnection, and the connecting pipes come off. This can be prevented beforehand.

In addition, the quick fastener detachment preventing member 6 attached to the quick fastener 1 is made of a strip-shaped material that can be plastically deformed, for example, slightly thin stainless steel as described above.
Therefore, even when the quick fastener 1 attached to the flange portion between the connecting pipes is pulled out in a direction perpendicular to the axial direction and forcibly removed, or when the disengagement prevention member is forcibly removed, the quick fastener 1 A pair of insertion guide portions 2b, 3b that expand in a letter C shape expands to the left and right, breaking the form of the bent portions 6b, 6c formed on the disengagement prevention member 6. As a result, the detachment preventing member 6 is subjected to plastic deformation in which the left and right bent legs 6d and 6e are spread outward.

  Further, the part of the disengagement prevention member 6 that undergoes plastic deformation is not limited to the bent portions 6b and 6c, but is deformed so that the tip claw portions 6f and 6g extend as shown in FIG. 6, and the bent leg portions as shown in FIG. When 6d and 6e are deformed by bending outward, as shown in FIG. 8, a part of the bent central portion 6a may be deformed as a mark squeezed by the tip of a tool such as a driver. Further, the above-described deformation of each part may occur simultaneously.

Therefore, it is possible to verify the fact that the quick fastener 1 is forcibly removed from the flange portions of the connecting pipes or the fact that they are about to be removed due to the plastic deformation of the respective parts received by the detachment preventing member 6.
Thus, it is possible to contribute to the maintenance management of the equipment, and to contribute to suppressing intentional removal of the quick fastener 1, and the like as described in the column of the effect of the invention described above. An effect can be obtained.

In the above-described embodiment, the tip claw portions 6f and 6g formed on the disengagement preventing member 6 are formed in a U-shape curved toward both outer sides. 6f and 6g may be formed to be curved in a U shape toward the tube axis direction of the first and second pipes 11 and 12 described above. In addition, even if they are formed in a U-shape so as to face each other in the tube axis direction, similar effects can be obtained.
In this case, the quick fasteners can be mounted by attaching the front-end claw portions 6f and 6g curved in a U shape to the axial edges of the bulging portions 2a and 3a formed on the quick fastener 1. 1, the detachment preventing member 6 can be attached more firmly.

  Next, a first modified example of the above-described detachment preventing member according to the present invention will be described with reference to FIG. 9, and the usage state of this modified example is shown in FIGS. 10 (a) and 10 (b). 2 that are the same as those shown in FIG. 2 are assigned the same reference numerals, and detailed descriptions thereof are omitted. FIG. 10A is a view when the opening of the insertion guide portion is large, and FIG. 10B is a view when the opening of the insertion guide portion is small.

As shown in FIG. 9A, the detachment preventing member 6 shown as the first modification is formed with bent portions 6h and 6i in the bent central portion 6a so as to be recessed in the direction of the bent leg portions 6d and 6e. Characterized by points.
When the bent portions 6b and 6c are not bent by about 180 degrees with the longitudinal direction of the bent legs 6d and 6e being 0 degrees, the bent portions 6j are not between the bent portions 6h and 6b. The bent portion 6k is formed between the bent portion 6i and the bent portion 6c.

  As described above, the detachment preventing member 6 shown as the first modified example is formed in a shape having elasticity in the lateral direction (X direction) by having the bent portions 6h and 6i. That is, as shown in FIG. 9B, when the detachment preventing member 6 is deformed, the bent portions 6b and 6c are configured to move further outward (X direction).

For this reason, when the degree of opening of the insertion guide portions 2b and 3b (distance L between the insertion guide portions 2b and 3b) is small (in the case shown in FIG. 10B), the detachment preventing member 6 according to the first modification example. Is in a state in which it can be extended in the lateral direction (X direction) (extendable form), and is brought into contact with the flanges 13 and 14 of the pipes 11 and 12 with an urging force (elastic force) in the vertical direction (Y direction). Attached to the fastener 1.
Further, when the insertion guide portions 2b and 3b are opened (the distance L between the insertion guide portions 2b and 3b) and the opening degree (the distance L between the insertion guide portions 2b and 3b) is large (FIG. 10 ( In the case shown in a), the detachment preventing member 6 according to the modification is attached to the quick fastener 1 in a state in which the tension is maintained in the lateral direction (X direction) (a state in which a predetermined tensile force is maintained).

Next, a second modification of the above-described detachment preventing member according to the present invention will be described with reference to FIG.
This second modification is characterized in that the bent portions 6b and 6c are bent approximately 180 degrees with the longitudinal direction of the bent leg portions 6d and 6e being 0 degrees. That is, the bent portions 6b and 6c of the second modification are curved in an arc shape, and the bent portions 6j and 6k in the first modification are not formed.
In such a detachment preventing member according to the second modified example, similarly to the detachment preventing member of the first modified example, the degree of opening of the insertion guide portions 2b and 3b (distance L between the insertion guide portions 2b and 3b). Is small (in the case shown in FIG. 10B), the disengagement preventing member 6 is in a state (extendable form) that can be extended in the horizontal direction (X direction), and the urging force in the vertical direction (Y direction) ( It is attached to the quick fastener 1 in contact with the flanges 13 and 14 of the pipes 11 and 12 with elasticity.
Further, when the insertion guide portions 2b and 3b are opened (the distance L between the insertion guide portions 2b and 3b) and the opening degree (the distance L between the insertion guide portions 2b and 3b) is large (FIG. 10 ( In the case shown in a), the detachment preventing member 6 is attached to the quick fastener 1 in a state in which the tension is maintained in the lateral direction (X direction) (a state in which a predetermined tensile force is maintained).

As described above, the disengagement prevention member 6 shown as the first and second modified examples has the opening degree of the insertion guide portions 2b and 3b caused by the dimensional variation within the range that the quick fastener 1 has no problem in product quality. It is possible to follow the variation in (the distance L between the insertion guide portions 2b and 3b), and the quick fastener 1 can be securely attached without wobbling.
When the degree of opening of the insertion guide portions 2b and 3b (distance L between the insertion guide portions 2b and 3b) is small (in the case shown in FIG. 10B), the disengagement according to the first and second modified examples. Since the prevention member 6 is attached to the quick fastener 1 by contacting the flanges 13 and 14 of the pipes 11 and 12 with elasticity in the longitudinal direction (Y direction) as shown in FIG. In addition, it can be more securely attached without wobbling.

DESCRIPTION OF SYMBOLS 1 Quick fastener 2, 3 Leg part 1a-3a Expansion part 2b, 3b Insertion guide part 4 Long window 6 Detachment prevention member 6a Bending center part 6b, 6c Bending part 6d, 6e Bending leg part 6f, 6g Tip nail | claw part 6h, 6i bent part 11 1st piping (safety valve)
12 2nd piping 12A Hot water supply pipe 12B Temperature control part 12a Guide pipe 13, 14 Flange

Claims (5)

A flange-like flange protruding in the circumferential direction is formed at each end of the first and second pipes, and the quick fastener is attached to the quick fastener while the flange is joined. A quick fastener detachment preventing device for inserting a part of the flanges in a joined state into a long window and preventing the first and second pipes from coming off,
In the quick fastener, bulging portions projecting toward both outer sides are formed on both leg portions formed by bending a strip-shaped material into an arc shape, respectively, and outwards are formed at the ends of the both leg portions. An insertion guide that expands in a C shape is formed,
The quick fastener detachment preventing member that is attached to the quick fastener and prevents the insertion guide portion from expanding in a C shape of the quick fastener is bent in a U shape, and the bent central portion is the insertion guide portion. A pair of bent legs, which are located between the bent guides and pass through the outer sides of the insertion guide part, are respectively engaged with the bulged parts through the long windows provided in the quick fastener. Quick fastener disengagement prevention device characterized by being combined.   2. The quick fastener detachment preventing device according to claim 1, wherein the long window provided on the quick fastener is formed so as to avoid the insertion guide portion.   Each of the bulging portions formed at the tip of the pair of bent legs in the quick fastener detachment preventing member has a tip claw curved in a U shape, and the pair of tip claw formed on the quick fastener. The quick fastener detachment preventing device according to claim 1 or 2, wherein the quick fastener detachment preventing device is engaged with each other.   The quick fastener detachment prevention device according to any one of claims 1 to 3, wherein the quick fastener detachment prevention member is formed in a strip shape from a plastically deformable material. .   The quick fastener detachment preventing device according to any one of claims 1 to 4, wherein a bent portion is formed in the bent central portion so as to be recessed toward the bent leg portion.

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