KR200489946Y1

KR200489946Y1 - A clamping collar with an asymmetrical reserve of capacity

Info

Publication number: KR200489946Y1
Application number: KR2020150000746U
Authority: KR
Inventors: 니꼴라 리골레; 파브리스 쁘레보; 빠뜨리끄 굴레; 압델페타 진비
Original assignee: 까이요
Priority date: 2014-01-31
Filing date: 2015-02-02
Publication date: 2019-08-30
Also published as: FR3017167A1; CN204878146U; KR20150003047U; DE102015101215A1; FR3017167B1

Abstract

The clamping collar comprises a metal belt 10 having clamping means 12, 14 and a corrugation portion 16 located behind the clamping means. In the free state, the corrugation portion 16 provides a front portion 17 located next to the clamping means, the radius of curvature of the corrugation portion at the front portion at the rear portion 19 of the corrugation portion, which is far from the clamping means. Is larger than the radius of curvature of the waveform.

Description

Clamping collar with asymmetrical reserves {A CLAMPING COLLAR WITH AN ASYMMETRICAL RESERVE OF CAPACITY}

The present invention relates to a clamping collar comprising a clamping means and a metal belt having an undulation located behind the clamping means.

By convention, the direction from the clamping means toward the corrugated portion at the shortest distance along the outer circumference of the collar is referred to as the "rearward" direction. In detail, the corrugated portion is located close to the rear direction, not facing radially from the clamping means. As described below, this type of positioning for the corrugation portion may be advantageous, for example, to facilitate internal bridging of the corrugation portion.

A collar of this type is known from patent document FR 2 662 488, which discloses a collar having a clamping means comprising a protruding lug and a hook which is caught behind the lug in order to clamp the collar.

The corrugated portion is located behind the clamping means, in particular behind the hook. Once the collar is positioned on the article and clamps the article, the collar receives a small change in diameter by the elastically deforming corrugation portion to conform to the tolerances in the dimensions of the article clamped by the collar. It is known to provide a reserve of capacity. The collar is made so that the preliminary dose is somewhat flat in order to be clamped on an article of exactly the same diameter as the designed diameter. As a result of this tolerance, if the diameter of the article is slightly larger than the design diameter, the preliminary dose can cause the diameter of the collar to increase somewhat. Conversely, if the diameter of the article is slightly smaller than the design diameter, the corrugations may be somewhat flatter than expected, still providing adequate clamping.

Furthermore, to some extent, the corrugation portion allows the collar to match the change in diameter of the clamped article with, for example, a change in the temperature of the surrounding environment. Thus, if the diameter of the clamped article decreases, for example due to creep or a drop in temperature, the diameter of the collar may elastically decrease (increasing the curvature of the waveform) to maintain the clamping state. Conversely, if the diameter of the clamped article increases due to, for example, a rise in temperature, the diameter of the collar may increase (reduce the curvature of the waveform) to avoid excessively strong clamping.

Nevertheless, there is a concern that this reserve dose may be "used up" when the collar is clamped. Under the influence of the clamping force, the tension in the belt can in particular be large behind the clamping means, thus causing the corrugation to be used, i.e. flattening the corrugation. Depending on the force involved and the magnitude of the deformation that the corrugations are affected, this deformation can be come plastic, in which case once the collar is clamped, in order to reduce or increase the diameter of the collar The ability of the corrugated portion to elastically deform is reduced.

In order to solve this problem, patent document FR 2 662 488 provides a reinforcing gusset in the region where the corrugation portion meets the belt of the collar, on the rear side of the corrugation portion. Such a solution has the advantage of acting to avoid excessive deformation in the portion of the corrugated portion with gussets. Nevertheless, the applicant has found that such a solution has disadvantages when implemented as in patent document FR 2 662 488. In order to avoid flattening the corrugated portion in an effective manner, the gusset portion needs to be quite large, and in fact, as disclosed in Patent Document FR 2 662 488, the gusset portion needs to extend to the upper portion of the corrugated portion. Unfortunately, gussets of such magnitude may be subject to excessive stiffness with respect to portions of the corrugated portion such that very large forces are required to deform the corrugated portion. In other words, it is difficult to find a compromise whether the gusset is too large or the gusset is too small. If the gusset is too large, the corrugation becomes too rigid. There is a risk of plastically deforming.

As recommended in patent document FR 2 662 488, it will be appreciated that by positioning the gusset in the rear of the corrugation section, deformation can occur preferentially in front of the corrugation section. Thus, while the collar is clamped, the front part of the corrugation portion close to the clamping means is preferentially deformed.

It is an object of the present invention to improve the specific prior arts so that the aforementioned disadvantages can be substantially avoided.

For this purpose, in the free state, the corrugation portion provides a front portion located next to the clamping means, and the radius of curvature of the corrugation portion at the front portion is larger than the curvature radius of the corrugation portion at the rear portion of the corrugation portion away from the clamping means. And, in the free state, the radius of curvature of the front portion of the corrugation portion is greater in the region of the front portion near the region where the front portion meets the cylindrical portion formed by the rounded belt than in the region of the front portion near the peak of the corrugation portion. Is accomplished by.

Thus, according to the present invention, the corrugation portion is not symmetric because the radius of curvature increases in the front portion. As a result, if the corrugation portion is tensioned in the same way with respect to the front and rear of the corrugation portion, the front portion and the rear portion of the corrugation portion will move differently. More specifically, the front part tends to be less deformed than the rear part. Because of the increased radius of curvature, the anterior portion is less bent than the posterior portion, that is to say "flat" compared to the posterior portion. Thus, when the corrugation portion is subjected to tension, the front portion of the corrugation portion is no longer flattened, while the rear portion may be flattened.

When the collar is clamped, the portion of the corrugation portion closer to the clamping means is more directly subjected to the tension resulting from the clamping. Thus, in the symmetrical corrugated portion, the portion closer to the clamping means will be more deformed than the portion farther from the clamping means. On the contrary, in the present invention, the portion of the corrugated portion closer to the clamping means, that is, the front portion, has a shape that is less affected by being flattened than the remaining portion, as described above. Under the influence of clamping tensions in which tension is directly applied, the front part is slightly deformed, less likely to exceed the elastic limit, while the rear part may be deformed, but is likely to exceed the elastic limit because it is less directly subjected to clamping tension. Is less.

Furthermore, the corrugation portion has a greater capacity to flatten in the region of the anterior portion close to the ridge of the corrugation portion than in the region of the anterior portion further away from the crest. Since this zone is closer to the clamping means, it is preferentially influenced by the tension in the belt caused by the clamping. As a result, the deformation caused by the clamping tension is wholly or partially biased into the region of the part further away from the clamping means, thereby minimizing the risk of exceeding the elastic limit.

The invention applies, in particular, to a clamping collar comprising a lug and a hook positioned respectively near the first and second ends of the belt, wherein the hook is used to clamp the collar with the hook hung on the lug and clamped. When retained, the front wall portion is provided for holding against the rear wall portion of the lug, and the corrugation portion is located behind the hook.

For example, this is a color of the form disclosed in the above-mentioned patent document FR 2 662 488, or patent document FR 2 705 410, FR 2 705 411.

Such hook-and-lug collars have the advantage of simplicity in design and use, while clamping can be effected effectively. Nevertheless, in this type of collar, the tension in the belt peaks while the free edge of the hook passes over the tip of the lug as the hook engages. The hook then descends towards the center of the collar and the front wall of the hook is caught in the rear wall of the lug. While the hook moves downward, the tension in the belt decreases slightly. The corrugated portion deformed to be flat under the influence of the tensile force peaks will elastically return to a more curved shape with the reduction of the tensile force in the belt. The front part of the corrugated part, which is limited in the degree of deformation, is slightly elastically returned to its initial shape, which means that the elastic return only slightly affects the directionality of the hook, that is, the quality of its catching to the rear wall of the lug. Means that. In detail, although the hook is inclined when passing the lug, the risk of remaining inclined to some extent after passing the edge is limited. Thus, regardless of whether the collar's diameter is increased or decreased, which affects proper positioning of the hook relative to the lug, the corrugation portion of the present invention faithfully performs the function of providing an elastic return reserve capacity without deformation. . In other words, the fact that the front portion of the corrugated portion deforms less easily than the rear portion helps to maintain a good catch quality of the hook upon the aforementioned elastic return.

Since the corrugation portion forming the preliminary dose is located close to the hook, it can take advantage of elasticity to ensure that the hook is properly repositioned after tilting as the edge of the hook crosses the tip of the lug. Nevertheless, since the corrugation portion is close to the hook, the reserve capacity may be excessively used under the influence of the tension force under which the corrugation portion is tensioned during the engagement. With the present invention, by limiting the deformation of the front portion of the corrugation portion, the risk of such overuse is limited.

Furthermore, such hook-and-lug collars can be clamped with the help of pliers having jaws respectively supported against the rear of the hook and against the opposite side of the lug, ie against the rear wall. have. Since the corrugation is close to the rear of the hook, there is no risk of disturbing the bearing engagement of the pliers with respect to the rear of the hook, and the corresponding jaw will be difficult to be inserted in the space available between the front of the corrugation and the hook. There is no danger. With the present invention, the increase in the radius of curvature of the corrugated portion at the front portion forms a setback that facilitates access to this space. Compared to the symmetrical corrugated portion, the extent to which the front portion of the corrugated portion protrudes relative to the rest of the belt is more progressive.

In one aspect, the radius of curvature of the corrugation portion is substantially constant in at least a portion of the rear portion of the corrugation portion extending to the rear of the radial reference plane passing through the peak portion of the corrugation portion.

The corrugation provides a simple shape.

In one aspect, the radius of curvature of the corrugation portion in the free state increases with respect to the clamping means in at least a portion of the front portion of the corrugation portion, as compared to the rear where the corrugation portion is located.

Under such circumstances, the part of the front part of the corrugation part may be prepared to extend toward the clamping means to the area where the cylindrical part formed by the rounded belt and the front part of the corrugation part meet, compared to the rear where the corrugation part is located.

The above-described progressiveness, as compared with the rearward where the corrugation is located, affects the region in such a way that the clamping tension is gradually weakened, but as it moves further backwards relative to the clamping means, The zone has the effect of greater deformation under the influence of the clamping tension.

In one aspect, the front portion of the corrugation portion provides a substantially planar portion.

The shape of the wave portion is particularly simple.

For example, when viewed in the direction toward the clamping means, compared to the rear where the corrugation portion is located, the front portion of the corrugation portion provides the curved portion and the planar portion successively so that a substantially flat portion is formed after the curved portion having a substantially constant curvature radius is formed.

The substantially planar portion may be prepared to extend toward the clamping means up to the area where the cylindrical portion formed by the rounded belt and the front portion of the corrugated portion meet, compared to the rear at which the corrugated portion is located.

The collar may comprise a reinforcement gusset for reinforcing the rear portion of the corrugation portion.

This corresponds to the solution recommended by patent document FR 2 662 488. Nevertheless, due to the asymmetry of the corrugations of the present invention, this solution can be implemented in an optimal manner. The gusset may be provided with a size suitable to reinforce a predetermined area of the rear portion of the corrugation portion.

Under such circumstances, the reinforcing gusset can be located in the region where the rear portion of the corrugated portion and the corrugated portion formed by the rounded belt meet.

Thus, the region in the rear portion close to the ridge, and thus far from the cylindrical portion, can be more easily deformed than the meeting region comprising the gusset portion and more easily than the rear portion of the corrugation portion where the radius of curvature increases.

According to the present invention, the portion of the corrugated portion closer to the clamping means, ie the front portion, has a shape that is less affected by being flattened than the remaining portion, as described above. Under the influence of clamping tensions in which tension is directly applied, the front part is slightly deformed, less likely to exceed the elastic limit, while the rear part may be deformed, but is likely to exceed the elastic limit because it is less directly subjected to clamping tension. Is less.

Through the following detailed description of the embodiments shown by the non-limiting examples, the present invention is well understood and the advantages of the present invention are more clearly shown. Detailed descriptions refer to the accompanying drawings.

1 is a side view of a collar according to the present invention in a free state prior to clamping;
Fig. 2 shows the same color in the clamped state with the corrugated portion flattened as a result of using the spare capacitance constituted by the corrugated portion; And
3 and 4 are diagrams similar to FIG. 1 showing modified embodiments.

The collars shown in FIGS. 1 and 2 comprise a metal belt 10 consisting of a rounded strip of metal. The collar has a means for clamping the belt, in particular composed of a lug 12 and a hook 14. More specifically, the lug 12 is located near the first end 10A of the belt and protrudes radially from the belt. The hook 14 is located near the second end 10B of the belt 10 and likewise protrudes radially from the belt. The belt provides an undulation 16 which is located behind the clamping means, in particular behind the hook 14. The direction back from the hook is the direction indicated by arrow R.

The first end 10A of the belt also extends under the hook in the free state and extends below the corrugation 16 in the clamped state. It will be appreciated that it provides an extension to form. The receiving portion 18 thus forms a bridge inside the corrugation portion to provide continuous support against the article to be clamped, despite the presence of the corrugation portion. Since bridge formation can be simply provided by extending the first end of the strip without significantly adding material, this bridge formation can be made easier by the fact that the corrugation is close to the hook. In a general manner, the fact that the corrugated portion located at the rear, as described above, is relatively close to the clamping means, since the bridge formation can take advantage of the clamping means or can be formed continuously with the clamping means, making this easier. A bridge is formed in the wave portion.

The clamping means can have a shape different from that shown, for example the clamping means are made in the form of a U-shaped lug upside down and then the clamping can be made by bringing the U-shaped branches closer together. It will be appreciated. It is also possible to use, for example, screw-clamping means.

Furthermore, although the belt of the collar shown is formed in detail from a single metal strip, the present invention is in some other way, for example as described in French Patent No. 2 950 402 or No. 2 932 856. It can of course also be applied to the collar from which the belt is made, for example in a way having two strip parts.

In order to close and clamp the collar, the front wall portion 15 of the hook 14 passes over the lug 12 so that the front wall portion of the hook is caught on the rear wall portion 13 of the lug 12 and this rear wall portion It can be seen that it is maintained against.

1, the free portion, ie before the collar is clamped, the corrugation portion 16 provides a front portion 17 located next to the hook 14, where the radius of curvature of the corrugation portion is far from the hook. It will be appreciated that it is larger than the radius of curvature at the rear portion 19 of the corrugated portion away.

Specifically, in Fig. 1, the radius of curvature of the rear portion 19 of the corrugation portion is indicated by the member number R1 and is much smaller than the radius R of the belt. For example, R is at least 10-20 times larger than R1. In contrast, the radius of curvature of the front portion 17 is not given a member number, since the front portion 17 is planar within the portion 17A as shown, so that the radius of curvature is infinite.

In total, the rear portion 19 extends at least partially to the rear of the reference plane P passing through the crest S of the corrugation portion, where the crest portion S of the corrugation portion is from the center C of the belt. This is the point where the radial distance to the corrugation portion is maximized. In particular, the radius of curvature R1 of the rear portion of the corrugation portion is substantially constant and the rear portion extends to a point 19A located in front of the reference plane P, from which the flat portion 17A of the front portion of the corrugation portion is located. And the planar portion 17A is connected tangentially at the point 19A. At the front end, ie at the base 16A of the corrugation portion located next to the hook, the front portion 17 of the corrugation portion has a concave side facing outward of the belt, which is far from the center C. It encounters a cylindrical portion formed by a rounded belt via a meeting zone.

Except for this meeting area located at the base 16A of the corrugation portion, the front portion of the corrugation portion has a radius of curvature that is clearly larger than the radius of curvature of the rear portion. This radius of curvature is advantageously larger at the base 16A than at the peak S.

In particular, the transition from the rear part to the flat part 17A of the front part is made tangential at point 19A. Nevertheless, as shown in FIG. 3, it can be imagined that the radius of curvature gradually increases, where the radius of curvature of the wavy portion 116 is substantially constant at the rear portion 119 and the front base of the wavy portion. It gradually increases, starting from the peak S of the corrugation portion to form the front portion 117 of the corrugation portion going toward 116A.

Of course, as shown in FIG. 4, with respect to the front portion 217 of the corrugation portion 216 going toward the hook 14, a curved portion 217B is formed in which the curvature radius of the corrugation portion gradually increases and then is substantially planar. The two solutions can be combined by providing the curved portion and the flat portion one after the other to form the portion 217A. In particular, the planar portion 217A extends to the meeting area 216A where the front portion 217 of the corrugation portion 216 meets the cylindrical portion formed by the rounded belt. Furthermore, in FIG. 4, the radius of curvature of the corrugation portion 216 remains substantially constant beyond the rear portion 219.

It may also be made to increase the radius of curvature in the rear portion of the corrugation heading towards the mountain, or in the front portion, to be made to increase constantly before the plane or to the front base of the corrugation portion.

It will be appreciated from the drawing that the collar provides a stifferner gusset 20 to reinforce the rear portion 19, 119 or 219 of the corrugation portion. In particular, such gussets are formed by ribs located at the rear bases 16B, 116B or 216B of the corrugations, whereby the corrugations meet with the cylindrical portions formed by the rounded belts. This rib is located only at the rear base, and as shown in FIG. 1, the rib extends only over a portion of the height H of the corrugation portion, the height H of which is curved with the ridges S of the corrugation portion. It is the distance between the cylindrical portions formed by. For example, the gusset 20 extends over approximately half or less of the height H.

FIG. 2 is a diagram for showing what happens to the corrugated portion while the collar is clamped. In this figure, the corrugation portion 16 is flattened, but not all of the rear portion 19 of the corrugation portion to be deformed is flattened, so that the radius of curvature is greatly increased, while the front portion 17 of the corrugation portion is slightly deformed. Could be. Furthermore, in view of the fact that the front portion is formed by the flat portion 17A in this embodiment, the deformation occurs above all within the front portion 17 of the corrugated portion 16 inclined with respect to the front base 16A, It is supported against the receiving part 18.

3 and 4, the movement of the corrugations 116 or 216 under the effect of tensioning the belt is similar, and the rear portion is more deformed than the front portion under very strong levels of tension. Nevertheless, the front part can be deformed by combining a small increase in the radius of curvature with the inclination of the front base of the corrugation part.

10; 110; 210: (metal) belt
12, 14: clamping means
16; 116; 216: undulation
17; 117; 217: front
19; 119; 219 rear part
20: (reinforcement) gusset

Claims

A clamping collar comprising a metal belt (10; 110; 210) having clamping means (12, 14) and a corrugation portion (16; 116; 216) located behind the clamping means,
In the free state, the corrugations 16; 116; 216 provide a front portion 17; 117; 217 located next to the clamping means, the radius of curvature of the corrugations in the front portion being far from the clamping means. Greater than the radius of curvature of the corrugated portion at the rear portions 19; 119; 219 of the corrugated portion,
In the free state, the radius of curvature of the front portion 17; 117; 217 of the corrugation portion 16; 116; 216 is more curled than the region of the front portion close to the peak of the corrugation portion. Large in the region of the front portion close to the region 16A; 116A; 216A where the front portion and the cylindrical portion formed by
Characterized in that the clamping collar.

The method according to claim 1,
The clamping means comprises a lug 12 and a hook 14 positioned near the first and second ends 10A, 10B of the belt, respectively, wherein the hook clamps the hook onto the lug. Providing a front wall 15 for holding against the rear wall 13 of the lug when retaining the collar in a closed state,
The corrugations 16; 116; 216 being located at the rear of the hook
Characterized in that the clamping collar.

The method according to claim 1 or 2,
The curvature radius R1 of the corrugation portion is the rear portion 19; 119; 219 of the corrugation portion 16; 116; 216 extending to the rear of the radial reference plane P passing through the peak portion S of the corrugation portion. A clamping collar according to claim 1, wherein the clamping collar is constant.

The method according to claim 1 or 2,
The radius of curvature of the corrugation portion in the free state is clamped in at least a portion 117; 217B of the front portion 117; 217 of the corrugation portion 116; 216 as compared to the rear portion of the corrugation portion 116; 216. Clamping collar, characterized by increasing with the heading (14).

The method according to claim 4,
The portion 117 of the front portion of the corrugation portion 116 is clamped to an area 116A where the cylindrical portion formed by the rounded belt 110 and the front portion of the corrugation portion meet, compared to the rear portion of the corrugation portion 116. Clamping collar, characterized in that it extends towards the means (14).

The method according to claim 1 or 2,
Clamping collar, characterized in that the front portion (17; 217) of the corrugation portion (16; 216) provides a flat portion (17A; 217A).

The method according to claim 6,
Compared to the rear portion of the corrugation portion 216, in the direction toward the clamping means 14, the front portion 217 of the corrugation portion is formed after the curved portion 217B having a constant radius of curvature is formed and then the flat portion 217A is formed. Clamping collar, characterized in that to provide a curved portion and a flat portion in succession to be formed.

The method according to claim 7,
The planar portion 217A is clamped to a region 216A where the cylindrical portion formed by the rounded belt and the front portion 217 of the corrugated portion 216 meet, compared to the rear portion of the corrugated portion 216. Clamping collar, characterized by extending toward (14).

The method according to claim 1 or 2,
Clamping collar, characterized in that it comprises a reinforcing gusset (20) for reinforcing the rear portion (19; 119; 219) of the corrugations (16; 116; 216).

The method according to claim 9,
And the reinforcing gusset is located in an area where the rear portion of the corrugated portion and the corrugated portion formed by the rounded belt meet.

The method according to claim 3,
The radius of curvature of the corrugated portion in the free state is clamped in at least a portion 117; 217B of the front portion 217; 217 of the corrugated portion 116; 216 as compared to the rear portion of the corrugated portion 116; 216. Clamping collar, characterized by increasing with the heading (14).

The method according to claim 3,
Clamping collar, characterized in that the front portion (17; 217) of the corrugation portion (16; 216) provides a flat portion (17A; 217A).

The method according to claim 3,
Clamping collar, characterized in that it comprises a reinforcing gusset (20) for reinforcing the rear portion (19; 119; 219) of the corrugation (16; 116; 216).