JPH0364386B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a U-shaped closure clip made of a strip of material and used for flexible tubes and bags, and more particularly, the invention relates to a U-shaped closure clip made of a strip of material and used for flexible tubes and bags, and more particularly, the invention relates to a U-shaped closure clip made of a strip of material and used for flexible tubes and bags, and more particularly, the invention relates to a U-shaped closure clip made of a strip of material and used for flexible tubes and bags, and more particularly, the invention relates to a U-shaped closure clip made of a strip of material and used for flexible tubes and bags; and the ends of these legs are bent outward to form a connecting web, which allows the clip to be separated from the other clips in one strip. and connecting the bottom to the legs. The present invention relates to a U-shaped closure clip made of a strip of material whose bending portion has a radius of curvature at least equal to the thickness of the strip of material.

To close the stuffed end of a bag or tube with such a clip, first insert the bottom of the clip, with the legs upward, into a suitable mold. The end to be occluded, usually the end of the stuffing shell that has already been squeezed or twisted, is then set into the clip, after which the punch is approached from above to the female die to insert the clip into the strip (i.e., strip). section) and occlude it. (Federal Republic of Germany Patent No. 1078495, German Patent No. 1761616, German Patent No. 2606658).

This type of occluding clip made of strip material is always subject to great demands with respect to tightening force, resistance to slippage and reliable sealing performance, but it is especially important when occluding integuments such as air-impermeable intestinal fillings. These conditions are especially necessary. Various forces act on such a closing clip (see columns 1 and 2 of German Patent No. 2,606,658). In this closing clip, the clamping force and the resistance to slipping are increased, and in order to improve the sealing performance, the outer edge of the strip of material in the area of the clip base and the legs is provided with two lines extending along this outer edge. Two protrusions are formed and partially bent inward. However, in the case of this closure clip, the radius of curvature of the bend between the clip bottom and the clip leg is small. For this reason, the closed end is not always squeezed well at this point, and sometimes capillaries are formed at this point, which leads to loss of sealing performance and thus to disadvantages such as fat leakage or air infiltration. A phenomenon occurs. Moreover, the use of this occluding clip is particularly effective only when occluding intestinal fillings having a relatively large diameter of about 60 mm or more.

It is therefore an object of the present invention to provide an improvement to a closure clip of the type mentioned at the outset, in particular an airtight closure consisting of a textile membrane coated on the inside or outside with polyvinylidene chloride, polyamide, polyester or plastic. Even when used for the outer skin of intestinal fillings, etc., the relatively smooth surface at the narrowed and closed end prevents slippage, and the blockage is firm enough to prevent fat and air from passing through. The purpose is to make it possible to use it effectively even for intestinal fillings with a fairly small diameter.

In order to achieve the above object, the present invention provides a closure clip of the type mentioned at the outset with a reinforcing bead, preferably facing inward, located approximately in the center of the clip, which reinforcing bead is connected to the bottom. It is configured so that it is almost limited to the area with the bent portion.

By configuring as described above, there is no slippage even when occluding the relatively smooth end of the outer shell of an intestinal filling, etc., and the entire circumferential surface is evenly compressed, so the occluded part is securely closed. It is sealed and can be effectively used for intestinal fillings with a fairly small diameter.

Examples will be described below based on the drawings.

FIG. 1 shows a first embodiment of the closure clip according to the invention, separated from the clip strip and having a clip base 1, on which the legs 2, 3 are folded. They are connected via sections 4 and 5. Both bent portions 4 and 5 have curved radii R4 and R5 on their inner surfaces, respectively, and the values thereof are larger than twice the thickness of the band-shaped material constituting the clip at the bent portions 4 and 5. be. Note that the thickness of the band-shaped material at the bent portions 4 and 5 is as follows:
It means the thickness of The inward reinforcing bead 6 extending along the clip bottom 1 and the folds 4, 5 extends approximately up to the junction between the folds 4, 5 and the legs 2, 3, i.e. with a radius R4. , R5, and ends at the range indicated by reference numerals 7 and 8, which is the boundary with the straight portions of the legs 2 and 3. The legs 2, 3 extend into connecting webs 9, 10 formed by outwardly bent bends, in which case U-shaped recesses 11, 12 are provided on the underside of the webs 9, 10. Each is provided.

FIG. 2 also shows a second embodiment of the closure clip of the invention separated from the clip strip, but in this case, unlike in FIG. , 5 together with the clip bottom 1 form an arcuate curved portion having a common radius of curvature R on their inner surfaces, and thus have a common center of curvature 13.

FIG. 3 shows a continuous clip strip having a plurality of clips according to FIG. (Third Embodiment) is formed (see FIG. 5).

FIG. 4 shows the clip according to FIG. 3 closed around the constricted end 16 of the stuffing shell. As is clear from this figure, the squeezed end 16 completely fills the clip within the folds 4 and 5, so that its entire circumferential surface is reliably squeezed.

FIG. 5 shows a partial cross-section of the butt seam 17, the shell of the stuffing, the crimped end 16 and the clip base 1. Grooves 14, 15 formed in the outer end surfaces of the clip form protrusions 20, 21 on the inner surface of the clip and protrusions 22, 23 on the outer surface of the clip.

By keeping the straight clip bottom 1 as in the first embodiment,
Even in the case of occluding clips with relatively long legs, especially for occluding large-diameter intestinal fillings,
This prevents the clip from turning and becoming dislodged during the closing process in the female mold after it has been separated from the clip strip. The reinforcing bead 6, which is limited to the area between the clip bottom 1 and the bent portions 4 and 5, increases the strength of the closing clip against bending, and in particular, since the bead 6 is provided facing inward, it further prevents slippage. It also increases resistance. leg 2,
3, since the reinforcing bead 6 is limited to the area between the clip bottom 1 and the folded parts 4 and 5, the resistance at the upper part of the clip leg during the closure process is minimized, and as a result, the machine and the intestinal filling Only a small amount of tightening force is required without damaging the outer skin, etc.
That is, according to the present invention, it is possible to obtain a closing clip with significantly improved characteristics even when the material cost is the same, or conversely, when the tightening force is the same, the material cost can be kept low. can. Therefore, for example, when compared with a closure clip whose bent portion does not have a large radius of curvature and does not have the reinforcing bead described in the claims, the average tightening force is approximately 20%, and the clip slip ratio (bursting pressure kp/mm ² ) and resin seal performance were improved by approximately 20% and resin seal performance by approximately 30%.

Suitable for occlusion using the occlusion clip according to the invention are long-term, intestinal fillings that are treated with boiling water, such as intestinal fillings that are treated in autoclaves and boiled, where the internal pressure of the intestinal filling is significantly increased. This includes intestinal fillings that are processed to preserve them. Furthermore, the clip according to the invention has an outer shell, such as a fibrous intestinal filling, which has a coating that is smooth enough to allow the clip to easily slip off due to the filling pressure of the intestinal filling, etc., or the internal pressure of the intestinal filling, which increases during boiling. Suitable for occlusion.

In order to achieve the object of the present invention, especially in the case of intestinal fillings having a fairly small diameter, that is, a diameter of about 50 mm or less, the bent parts 4 and 5 are combined with the clip bottom part 1 as shown in the second embodiment. The curved portion is formed into an arcuate curved portion having a common radius. In this case, since the lengths of the legs 2, 3 are small, there is no risk that the closing clip will turn and come off when it is cut and closed in the female mold.

For reference, individual clips for obstructing the outer skin of intestinal fillings, etc., in which the bottom portion of the clip is configured as an arc-shaped curved portion, are already known from U.S. Pat. Nos. 2,972,791 and 3,017,638. ing. The clip has two outwardly directed beads which extend into the area of the inwardly folded legs. This closure clip cannot be made as a clip strip connected at each end;
The clip according to the invention is of a different type and its long bead requires a high closing force. Another individual clip known from U.S. Pat. No. 3,061,838 is
Although it does have an arc-shaped clip bottom,
It is reinforced by a protrusion extending along the outer edge. However, this clip cannot be made into a continuous clip strip according to the invention because of the large amount of waste and the risk of burr formation. These two types of individual clips are simply fabricated from thin metal plates to save material and do not achieve the object of the invention.

Particularly large diameter and large weight (diameter 60mm or more,
In order to increase the tightening force in the case of intestinal fillings weighing approximately 1 kg or more, as shown in the third embodiment,
It is advantageous to form grooves 14, 15 extending along the outer end surface within the area of the reinforcing bead 6 within the area of the clip bottom 1 and the clip legs 2, 3. With this configuration, two protrusions extend along the outer end surface, and if the protrusions extending toward the inside of the clip are made relatively thick, the resistance to slipping and the tightening force can be increased. This is advantageous because it can be further enhanced. This groove also increases the strength of the material,
This in turn makes it possible to save on materials.

In order to increase the slip resistance of closure clips made of smooth material, it is advantageous to provide the known longitudinal grooves on the inner surface of the clip, especially in the region of the leg which is not reached by the reinforcing bead 6. .

U-shaped recesses 1 are provided on the lower surfaces of the bent portions (webs) 9 and 10 of the upwardly bent leg ends.
1, 12 are provided, and the advantages of this known recess are utilized.

As explained above, according to the present invention, the radius of curvature of the bent portion located between the clip bottom and both legs is at least equal to the thickness of the band-shaped material forming the clip at the bent portion. Since it has a large radius, the R of the bent part becomes large.
Unlike in the past, this part does not bend smoothly when it is closed, and there is no corner left in this part. That is, at the time of occlusion, the end of the intestine filler or the like is completely filled within the closed clip, so that the entire circumferential surface of this end is reliably compressed. Therefore, the formation of capillaries is avoided, and reliable sealing is possible without resin flowing out or air infiltrating from the closed portion.

Furthermore, according to the present invention, since the reinforcing bead is provided so as to be placed approximately in the center of the clip, even when obstructing a skin such as an intestinal filling material that has a smooth surface and is slippery, the clip can remain on this surface. There is no slippage. Furthermore, since this reinforcing bead is substantially limited to the area between the bottom of the clip and the bent portion, no particularly high tightening force is required for this reinforcing bead during the closing process. Therefore, it is advantageous because it does not damage the outer skin or put unnecessary strain on the machine.

Further, according to the present invention, by making the radius of curvature of the bent portion relatively large so that the bent portion and the bottom portion of the clip have a common radius of curvature, small diameter intestinal fillings, etc. It also has the advantage of being able to be used effectively.

[Brief explanation of drawings]

FIG. 1 shows a closure clip (first embodiment) according to the invention having two folds between the clip base and the clip leg, which can be separated from a continuous clip strip. FIG. 2 is a front view of a closure clip (second embodiment) with a common radius of curvature separated from a continuous clip strip; FIG. 3 is a front view of the outer end surface. A perspective view showing a strip in which three closure clips according to FIG. 1 are connected, each having a groove (third embodiment) formed in a FIG. 5 is a partial sectional view taken along the line A--A of the closed clip in FIG. 4. In addition, in the symbols used in the drawings, 1... Clip bottom, 2, 3... Leg, 4, 5
...Bending portion, 6...Reinforcement bead, 9,10...
Connection web, 14, 15...groove, R, R4, R
5...This is the radius of curvature of the bent portion.

Claims (1)

[Scope of Claims] 1. A U-shaped closure clip made of a strip-shaped material and used for flexible tubes and bags, the clip comprising one bottom part 1, two legs 2,
3, and the ends 9, 10 of these legs are bent outwards to form a connecting web, so that the clip can be attached to other parts in one strip. radius of curvature R 4 , R ₅ on the inner surface of the bent portions 4 and ₅ connecting the bottom portion 1 to the leg portions 2 and 3;
a U-shaped closure clip having a size at least equal to the thickness of the strip of material in the folds 4, 5, preferably inwardly directed reinforcing beads arranged approximately in the center of the clip; 6, the reinforcing bead 6 being substantially confined to the area between the bottom portion 1 and the folded portions 4, 5. 2 The radius of curvature on the inner surface of the bent portions 4 and 5 connecting the bottom portion 1 to the leg portions 2 and 3
2. A U-shaped closure clip of strip material according to claim 1, characterized in that R ₄ and R ₅ are at least twice the thickness of said strip material. 3. The bent portions 4, 5 and the bottom portion 1 constitute an arcuate curved portion having a common radius of curvature R, as set forth in claim 1 or 2. U-shaped closure clip made of strip material. 4. Continuous grooves 14, 15 are additionally formed on the outer end surface of the strip, close to the bottom 1 and the legs 2, 3, preferably close to the reinforcing bead 6. A U-shaped closure clip made of a strip of material as claimed in claim 1, 2 or 3.