DE1525815B1 - LONGITUDINAL, IF NECESSARY BRANCHED PIPE OR HOSE, SHAPED SHELL MADE OF THERMOPLASTIC PLASTIC OR THE LIKE - Google Patents

Description

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The invention relates to an elongate, which may be forgiven in a heat shrinking process branched pipe or hose forming material no longer holds together, Migen envelope made of thermoplastic material You also have a casing for insulated pipes Od. The like. For protection and isolation, in particular od. The like. Made from a flat, archable band special of electrical lines and cables, 5 thermoplastic plastic with on the long sides Should be used. one piece, ζ. Β. sheaths connected by welding to cover pipes, cables, zip or slide fastener elements that are used for manufacture. Like. Are known in various designs. ment of the envelope are telescopic, be-So a tubular sleeve covered with rubber is known, is proposed, in which the tape, as in which consists of a sheet metal plate, with a rubber io shrink tubing usual, by supplying skin is covered and then rolled in a tubular shape and heat can be shrunk on. With this arrangement is as well as at both end edges with rectangular there is a risk that the closure is through the is provided with curved back edges, which can then loosen or loosen in the shrinkage tension, since the rolled up in opposite directions tear and fastener elements only in circumferential directions and from a U-shaped clip strip 15 interlock with each other, can be held together. This Ausfüh- object of the invention is to take advantage of the berungsform does not result in a plastically deformable known shrink tube and the proposed envelope cross-section, the wrapping, which is also carried out irregularly, by bending around it electrical cables with bends, branches protecting object using the or include cross-sectional changes. 20 knew to unite webs and brackets, whereby There are also two-part sheaths designed to be achieved that the technical advantages knows that fit together in the form of half-shells of a heat-shrink tubing practically also in such and in the installed state bracketed together cases are applicable by protecting parts, can be. The assembly of such half-shells is over which a hose cannot be pulled, but without technical aids manual 25 so in any curved or also Kind not feasible, the gap-free envelope present branched form, so that they are retrospectively irregular line routing can only be reliably enveloped in this form appropriate, such as T-pieces and corner connectors. The invention is characterized in that possible and reliable cohesion of the fact that the envelope jacket has at least one longitudinal part only when using sufficiently rigid 3 ° the radially protruding, divisible bead of the T-fronts to achieve, which then does not have a plastically deformable cross-section, with the semi-beads with is cash. their back surfaces by means of a C-shaped clamp-es are also known pipe sleeves that can be pressed against one another without any gap from a mer Thermoplastic exist and with one and the half-beads when giving shape memory-shape memory are equipped so that they are kept with 35 nits so that they are afterwards almost uninvolved in the warm enough large cross-section on the shrinking process to be protected, the objects can be pushed and by such a design of the shell then in the installed state under action, not only is a tight enclosure of the too can be shrunk on by heat. The protective parts reached, but one achieved through However, turning such pipe sleeves is limited to 4 ° regardless of the actual shrinking process in the event that the ends of a cable encased the shape of that to be protected by the sheath are to be or a cylindrical body and the object is stable and reliable limited length, at least from one side of the tightly holding envelope. You're not up anymore is accessible. In all other cases one would have to restrict cylindrical objects. One can legs First cut open such a pipe sleeve, around it 45 arbitrarily curved or branched designs from the side at the desired point, both objects to be protected by the cover play an electrical cable, create a sheath made of thermoplastic plastic or the like., can. which is given a shape memory, pipe-like cable sheaths are still reliably sheathed in every design, lungs that can be used to wrap coil wires different large cross-sections can include, achieved that practically only the envelope but the out only if a certain length of shrinkage temperature is obtained, while the enveloped with a uniform cross-section and the Um- Halbwülste practically not deform. the Enclosure glued at the end, overlapped or with half-beads have enough excess of the a T-shaped edge distance of corresponding 55 brackets comprised material for the maintenance of the Staple strip is held together. In the case of mutual pressure during the heating cup Cable sheaths cannot be heat treated on.

Use shrinkable materials because these can then be divided from the outset

have bulges slip out of the clip strip in question. The separation of the bulge or bulges

If the shrinking process can be implemented only after the shape memory has been imparted

directs. They can also be done for the same reason. Cutting through an initially

already known bead formed in one piece with tongue and groove, whereby the envelope

matching half-shells made of rigid plastic cannot be opened and at its two edge

for wrapping objects of any shape, two semi-bulges are created, which has the advantage of

because the rigid material does not have the plastic 65 that the semi-bulges are very precisely

having cal deformability and a close fit together if the separating cut is not in one

therefore, such half-shells do not shrink evenly. Even if the jacket is for the

is possible because then the engagement of tongue and groove is deformed for the intended purpose,

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fit its two half-beads, which would equally take on the shrinking process, the firm and reliable

are shaped or compressed, always in the shape of the correct fit of the clamp is not impaired,

each other, from which they originally cut through the proposed envelope can in principle

were separated. in elongated form tubular or hose-shaped and

It is useful if the flexibility of the C-5 can also be branched, if necessary shaped bracket, which is expediently made up of an ent- not only at the points of contact of a line with a discussion bent metal profile consists, through a set cross-section, of bends or curvatures Number of be applied at equal intervals, but also on two line incisions is enlarged. These cuts were made. As a result of its reliable shrinkability Arbitrary curvatures of the envelope can in io with a firm and tight fit of the two webs Longitudinal direction, with only the back of the clip holding storage for any application is bent, while its legs, which are limited to a small number of basic shapes Clasps are used, as a result of the incisions, with which one can in particular electrical mortars Represent individual brackets, the lines of any dimensions if necessary alone Curvature of the material does not participate. A 15 by applying the required heat of shrinkage such elongated bracket that can embed the cut without a gap. One needs for one The cover jacket summarizes, does not support the particular closure striving to fit together in pairs Purpose of the two half beads that are on the individual parts and no other accessories except The shrinking process of the actual cladding cannot be produced in a simple manner as a metal profile should participate and as a result of their shielding so bracket. With prefabricated work pieces made of art the heat-dissipating chamber does not contain any material that can be moved in the longitudinal direction Lent experience increase in temperature when the bulge turned out on the outside is obtained Shrinkage heat is applied to the cladding. by cutting open the two exactly

It is furthermore useful and at the same time increases matching webs that form the outer jacket when warming Strength of the shrink on the object to be protected 25 hold. This means that even in the case of the sheath to be closed in a cable-tight manner, if it is also possible in branches, the sheath can be removed Further development of the invention to shape according to the on a workpiece, which the property of slide on the ridges on the underside of the same elastic memory has been given, being adjacent C-shaped bracket in a known protuberance on the surface adjacent Way is formed with its two the webs engaging under 30 the two opposite edges. Legs close to the connecting neck of the webs The invention is illustrated in the drawing reaches. The strength of the clasp is thereby illustrated in the following embodiments still significantly increased that the thighs purify.

the bracket returned in the opposite sense. 1 shows an embodiment of the cladding

are bow. This is possible because these legs with 35 according to the invention before assembly in the diagram;

the incisions F i g made at equal intervals. FIG. 2 is a top plan view of the cladding shell of FIG

the deformability of the clip is not affected- Fig. 1 on a smaller scale;

run. F i g. 3 is an enlarged cross-section along FIG

In addition, by choosing line 3-3 from Fig. 2;

Cut the webs formed on the casing shell to 4 ° F i g. 4 shows a partial view of the connecting

reliable against a subsequent postponement;

by protecting that the contact surfaces of the webs, F i g. 5 shows a cross-section through the connec-

as known per se, with an interlocking connection bracket;

Teeth are provided. This toothing can Fig. 6 shows a further embodiment of the

either by a stepped cut across 45 envelope according to the invention, partly in view,

the preformed web take place or in such a way, partly in longitudinal section;

that the section in the longitudinal direction of the cladding in Fig. 7 is a cross section along the line 7-7 of the

Meaning a zigzag shape is performed. F i g. 6 on a larger scale;

A special simple and easy to cut through F i g. 8 shows a third embodiment of the envelope

The preform of the cladding can thus be 5 ° jacket in side view;

received that the longitudinal bead in the prefabricated Zu- F i g. Figure 9 shows a cross section along the line 9-9

stood is designed as an inner bead, which after that of Figure 8 is on a larger scale;

Cutting through by turning the inner Fig. 10 illustrates a top view of a

side of the envelope is shifted to the outside. changed shape of the junction of the Hüllman-

As a result of the plastic deformability of the envelope with the clamp on a larger scale;

jacket with reliably tightly fitting web surfaces. FIG. 11 shows a fourth embodiment of the

you can, if necessary, the relevant clasp casing according to the invention in cross section;

peel off the strip without difficulty, for example, 12 illustrates the embodiment of FIG

wise the encased lines of an electrical Fig. 11 before final installation, in cross section;

Cable, because the clip strips the 60 Fig. 13 reproduces the cross section of Fig. 12 after

can reliably grip provided webs, final assembly of the shell;

so by no means with jamming deformation on F i g. 14 illustrates another embodiment

the material of the envelope must act and the shape of a clip for the envelope in the diagram,

the neck does not connect the webs to the shell.

are pressed into the clip strip, regardless of shape unstable material for attaching

got to. In addition, the webs receive from the application, which the property of the plastic or

already put brackets a compression that can be given out of elastic memory, the

is sufficiently large, so that even a small part heated above the crystallite melting point and

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under compressive stress to a shape that is greater solid connection between the two parts of the than its normal shape, expanded and then formed into a bulge. In this case, of course, can is cooled, while it is no longer removed and adhered to again under compressive stress. A part treated in this way can be built.

remains in the expanded state until it again drops to a 5 In F i g. 1 is an embodiment of a Hüllman temperature being heated, which is shown above its crystallite. In this embodiment, the melting point is, wherein it is made on the cladding 10 from a material that contracts the original shape. Examples of the property of the plastic or elastic body can be given memory by heat-resilient materials. The shell part is described in U.S. Patents 2,027,962 and ία 10 is Y-shaped and has a main part 12 and thus 3,086,242. Polymers formed on chemically related fork parts 14 and 16. One way or by irradiation with e.g. preferred. an identical bead 20 along the arm 16 and the non-crystalline polymer which is the property of the other side of the main part 12 is formed. The plastic or elastic memory have, bulges are the same and have, as a consideration z. Polyurethane or ionomers, also of the bead 20, preferably a flattened one, can be used for the purposes of the invention. Since the upper part 22 and a constricted or unified envelope jacket made of a material can be laced connecting neck 24 adjacent to that which either has the property of the plastic surface of the envelope jacket. The bulges overlook or show the elastic memory, their entire length slit, so that the inside of the expressions "elastic memory" and legs 14 and 16 and the main part 12 accessible "plastic memory" is synonymous. As a result, the outer jacket can be used over a need. Branch of any counter-Es to be protected, a shell with a in the longitudinal direction 25 stand, z. B. a branch in a group of device extending bead pressed, extruded or wires 26, put in F i g. 1 shown in dashed lines, with the bead either on the outer. The beads 18 and 20 are shaped so that the side outward or from the inside inward volume of the material in the constricted parts protrudes. The bead extends over the entire ent- is smaller in cross-section than in the upper part,
distance over which the inside of the part should be accessible 3 ° around the two opposing half-bulges, and is shaped so that it connects along its longitudinal, the back surfaces are cut open on one axis to separate the part, whereupon a clip 30 about it. After the shell jacket has been formed, it is pushed. The clamp 30 is preferably a simulated holding element (dummy), the C-shaped workpiece made of metal or plastic with a little smaller than the final for the envelope 35 an upper part 32, the holding element provided against the top, is used to an extension of the bead lays, and curved side parts 34 to prevent the expansion of the bead and wrap around the upper part of the bead and ensure the shape of the bead, after which extend into the recess widened through the cover jacket has been. The sheath binding neck 24 is formed. As is best shown in, it is then expanded under heat and pressure and, 40 F i g. 4 and 5, the clip 30 is preferably cooled while it is held under pressure. The wise provided with a number of incisions 36 over their possibly used simulated holding element length, so that the clamp is then relatively removed and the bead is elastic over its.

Slit length. An elastic holding element from the envelope 10 is pressed into the geKunststoff or metal becomes desired shape over the bead 45 including the beads 18 and 20 pushed and holds both parts of it together, brought and then brought to a temperature above the that the cladding is heated during and after the restoring crystallite melting point of the material development is obtained in the desired shape. After it is made, and to a desired size, After the slitting, the casing jacket can, for example, by applying pressure to the Object, e.g. B. a group of wires, placed so inside the part to be protected, expanded. Elected, whereupon the bulge parts are placed against each other rend the expansion becomes a provisional clamp and the retainer over the bead which is slightly smaller than the final bracket is pushed. When the shell jacket is at a temperature of the shell jacket over the beads 18 and 20 perature is heated, which pushed over the crystallite melt in order to limit their expansion. Here point of the material from which it is made, 55 through it is later possible to create the actual bracket it assumes its original shape and lies down unhindered over the bead on the expanded one firmly around the object to be protected. To push through sharing. After the expansion, the This first installation is carried out by the casing jacket while maintaining the pressure Size for the respective purpose and can be refrigerated. After cooling down, the pressure can be released removed and then put on again, 60 are lifted, whereupon the envelope in the unused that it must be reheated. Because the envelope-wide state remains. The beads 18 and 20 jacket shrinks to its original size, are then cut lengthways, whereby it can be made different for a large number of objects by matching back surfaces 38 and 40 Size and similar shape can be used. As shown in FIG. 3, the will. If necessary, the inside of the casing can be cut open so that it sinks a fusible liner or liner, right back surface 42 so that an accurate z. B. a sealing compound !, are provided. The envelope vertical adaptation of the abutting one coat can do that too. be designed so that a back surface 38 and 40 is achieved.

After the beads have been cut off, the casing is ready for use. Since the jacket coat over his If the whole length is cut open on both sides, it can easily be branched off protective object, e.g. B. the group of wires 26, whereupon the clips 30 slide over the beads 18 and 20 are pushed. If the cladding 10 is now above the crystal melting temperature the material from which it is made is heated, it tends to focus on its to contract its original dimensions. Here he firmly encloses the object around the it has been laid, and thereby forms a firm and permanent protective coating or closure. That Firm application of the clamp in the necked area limits the movement of the material during the thermal springback process and ensures that the opposing parts are held together will. If at a later date a repair or other work on the protected Item must be made, the cladding can be removed by simply the Clamp 30 is pushed down from the beads. After the repairs have been carried out, the the same envelope can be reattached by simply being reassembled and the Bracket is pushed. The ability of the shell to shrink when exposed to heat, enables the same envelope to be used for objects with a wide range of sizes lies. For example, in the above group of wires, the number or size of the wires can be changed without changing the cladding. After the first installation, the Jacket is the right size for this specific purpose and does not need to be installed again to be heated more.

In certain cases it may be necessary for only one of the beads to be slit. This is for example the case when a splice is to be made on a main electrical line. In such a case, only the main line cannot be cut. If only part of the arm is to be slit open, the other is preferably not provided with a bead.

In order to prevent the clip from sliding off the bead due to vibrations, is preferred a small nipple 46 molded onto each end of each bracket. The warts appear during the expansion process flattened so that the clip can slide into place. When heated, the Warts return to their original shape and prevent the bracket from moving.

In Fig. 6 and 7 a second embodiment is shown. This embodiment is that above described embodiment similar with the exception that there is no branch, but the shell jacket shown is shaped so that it can cover an object that has a Part of its length has a reduced diameter. The envelope 50 has a region 52 a first diameter, a reduced diameter area 53, and a transition area 54, which connects the areas 52 and 53. As in the previously described embodiment the envelope 50 is pressed with a bead 58, which has the same structure as the beads 18 and 20 or shaped in some other way. The bead is slit in the longitudinal direction, and a clip 60, similar to the clip 30, serves to lock the two severed sections of the bead in place keep. Since the clip 60 is elastic, it easily fits the contours of the envelope 50 and holds as a result, the mutually opposing sections of the bead come together over the entire length. As in As shown in Fig. 7, the interface 62 of the bead 58 is perpendicular and not with a bend

ίο provided. The cladding 50 is in the same Way like the envelope 10 expanded and attached.

F i g. 8, 9 and 10 show a further embodiment. The envelope 70 shown here is a so- named 90 ° elbow. In this embodiment, the envelope is the same as in the previous one Embodiments formed with a bead 72 that with the beads already described is identical and to which a bracket 74 belongs, which is formed in the same way as the brackets 30 and 60 is. If, in this embodiment, the bead 72 is cut open in the longitudinal direction, it is with a number of teeth 76 provided, which a very precise adaptation of the two opposing Allow semi-bulges in the longitudinal direction. The bead 72 can of course with a vertical Bend may be provided or formed without any bend, as in connection with the previous ones Described beads, while the beads already described, optionally with in the longitudinal direction running teeth can be provided.

11 to 14 show an embodiment in which an extruded tube is used which has the same diameter over its entire length. As in Fig. 11, a hose 80 is extruded with a bead 82 which extends the entire length of the hose and projects inwardly from the inside thereof. The tube is then widened and the bead is slit longitudinally over its entire length into two half-beads 84 and 86. The hose is now turned inside out and the back surfaces 88 and 90 of the hose are brought into contact. As a result, the previously spaced apart parts 84 and 86 of the bead are directed away from each other and a generally T-shaped bead is formed.
A clip 92 can now be pushed over the bead in order to hold the jacket in its position, for example around a cable 94.

As best shown in FIG. 14, the bracket 92 is a modification of that shown in FIG. 1 to 10 shown bracket. The bracket 92 is made pliable by making slots 96 in the top and bottom lateral surfaces are provided. The longitudinal connection is ensured by the areas 98 are left standing along the entire length of the inner ends of the curved side surfaces of the Bracket run.

When the clip has been slid over the bead, the hose can be heated above the reset temperature of the material from which it is made. As a result of this heating, the hose tends to contract to its original dimensions. As a result, the cable 94 is firmly enclosed. If necessary, the inside of the cable facing the

109532/173

Hoses (outside like extruded) coated with a suitable, heat-activated adhesive so that a tight seal is obtained. Any other lining material that does not prevent the desired return of the envelope, could also with this envelope as well as in the other illustrated embodiments.

As the tube shrinks or contracts to its original diameter, the back surfaces 88 and 90 of the hose tend to pull out of the clip 92. The bead portions 84 and 86 that tightly against the curved Place side surfaces of the bracket 92, but stop this movement and prevent one further movement. In addition, the walls of the hose become thicker during its recovery. this has the consequence that the back surfaces 88 and 90 expand and firmly against the surfaces 98 of the Place bracket. This prevents the hose from pulling itself out of the clamp.

If necessary, the various sheaths shown and described can be produced in this way that the two parts, which are held together by the clamp, are glued together when the cladding shrinks. This can be done in a simple manner, for example, by these two parts are only slightly crosslinked so that they can be heat-sealed at the reset temperature. Of course, parts of this type cannot be removed and reinstalled; Installation forever. Bonding could also be achieved by separating the beads from the the remaining part of the jacket made of the same or a different material and then the bead glued to the rest of the shell after it has been crosslinked. Such a connection from two or more separate parts made of the same or different material to produce one One-piece outer jacket could of course also be made so as not to be connected to one another to produce glued or removable sheaths of the types described. the The only requirement for such a production is that the materials used can be glued to one another are.

Above were generally beads with a flat upper part and rounded side parts that form a Constricted part lead, shown and described. Of course, the top of the bead can be anyone have the desired cross-section as long as its lateral dimension is sufficiently larger than the lateral Dimension of the constricted neck part in order to ensure a secure connection or firm attachment to the Ensure bracket. If necessary, the bracket can be shaped to fit the respective Corresponds to the shape of the bead.

Claims (7)

Patent claims: 1. Elongated, optionally branched tubular or hose-shaped envelope made of thermoplastic Plastic or the like, which can be given a shape memory and the one continuous Has a longitudinal interface on which holding elements are provided, by means of those of the envelope at the interface after being wrapped around the object to be enveloped can be closed, after which the envelope jacket by supplying heat to the object to be enveloped can be shrunk on, characterized in that that the envelope (10, 50, 70, 80) has at least one longitudinally extending, radially projecting one divisible bead (18; 20; 58; 72; 84; 86) of T-shaped cross-section, the Half-bulges with their back surfaces (38, 40, 42, 62, 76, 88, 90) by means of a C-shaped clip (30,60,74,92) can be pressed against one another without a gap and the semi-bulges in lending of the shape memory are kept so that they are afterwards almost uninvolved in the heat shrinking process are. 2. Elongated, optionally branched tubular or hose-shaped envelope according to claim 1, characterized in that the separation of the or the beads only after lending the Shape memory takes place. 3. Elongated, optionally branched tubular or hose-shaped envelope according to claim 1 or 2, characterized in that the flexibility of the C-shaped bracket (30 or 60; 74; 92) enlarged by a number of equally spaced incisions (36) is. 4. Elongated, optionally branched tubular or hose-shaped envelope according to the claims 1 to 3, characterized in that after being pushed onto the webs (38 and 40 or 58; 72) on the underside of the same adjoining C-shaped bracket (30 or 60; 72) in a manner known per se with its two legs (34) engaging under the webs to close to reaches the connecting neck (24) of the webs. 5. Elongated, optionally branched tubular or hose-shaped envelope according to the claims 1 to 4, characterized in that the legs (34) of the clamp (30) in the opposite Senses are bent back. 6. Elongated, optionally branched tubular or hose-shaped envelope according to the claims 1 to 5, characterized in that the contact surfaces of the webs (38 and 40 or 72), as is known per se, provided with interlocking teeth (42 or 76) are. 7. Elongated, optionally branched tubular or hose-shaped sleeve according to the claims 1 to 6, characterized in that the longitudinal bead in the prefabricated state as Inner bead (82) is formed, which after cutting through by turning the inside the casing (80) is displaced to the outside. 1 sheet of drawings