EP3759779A1

EP3759779A1 - Multi-splice seal

Info

Publication number: EP3759779A1
Application number: EP19718645.5A
Authority: EP
Inventors: Thomas Heim; Bettina HEYER
Original assignee: DSG CANUSA GmbH
Current assignee: DSG CANUSA GmbH
Priority date: 2018-04-13
Filing date: 2019-04-12
Publication date: 2021-01-06
Also published as: WO2019197640A1; DE102018108817A1

Abstract

The invention relates to a multi-splice seal, in particular for use in a motor vehicle or the like, for electrically connecting at least two line pairs in at least two separate splice regions, wherein each line pair comprises a plurality of lines which are sheathed separately so as to be insulated and which are twisted with one another to avoid interference or interfering signals, but are untwisted at a connection region, are stripped at line ends, and are connected in at least two separate splice regions. For electrically effective separate production of a parallel connector with at least two splice regions, a spacer profile is provided, which comprises at least two holding portions designed to separate the at least two splice regions in an electrically insulating manner, and merely a shrink tube with an adhesive arranged therein surrounds the spacer profile, with the splice regions received therein, in an electrically insulating and water-tight manner.

Description

Multiple splice seal

The invention relates to a multiple splice seal, in particular special for use in a wiring harness in a motor vehicle or the like, for watertight, electrical connection of at least two pairs of wires, each pair of wires comprises a plurality of isolated insulated sheathed lines, which to avoid Interference or interference signals are twisted together, but at a Verbindungsbe rich are entdrillt, stripped at line ends and these ends of the line at least two separate

Splice areas are connected end to end.

In addition, the invention relates to a connection method for electrically isolated and watertight connection of min least two frontally adjacent splice ranges of at least two pairs of lines, each Lei processing pair comprises a plurality of isolated insulated sheathed lines, which signals to prevent interference or interference are twisted together , but at a Verbindungsbe rich are entdrillt, stripped at cable ends and are connected to at least two separate splice areas. State of the art

Preferably, a part of a wiring harness, e.g. CAN bus or line set Diverse line pairs, each consisting of 2-way twisted lines and there are at least two pairs of lines per side, which are split on both connectors (US Splice).

The connection of the cable pairs with another cable pair of a wiring harness by splicing. In the process, the individual lines of the line pairs are first of all undone or de-twisted by the other lines of a line pair and then the insulation is removed from the line ends of the individual lines.

The thus stripped joints of the cable ends with blan ken cable ends of the lines to be connected are then connected to each other by means of ultrasonic welding, crimping or other walls connection technology, thereby at least two separate splice regions for connecting the cable pairs arise.

Disadvantages of the prior art

The splice areas thus form connection points of the Pa rallelverbinders, on which no sheathing or Isolie tion is provided. The problem is the sealing several rer such in the installation position adjacent Spleißbe rich, which preferably with two of these two enclosing the sleeves, in particular two Schrumpfschlau surfaces with inside adhesive, which encloses the splice regions in principle mutually insulating. During shrinkage, an undesired contact between the two splice regions can occur, which can lead to a short circuit. For the connection of several untwisted splice areas of a parallel connector this is because of the limited construction space often not possible because the untwisting only over egg nen certain area is possible without unwanted spurious signals (EMC) occur. Defaults thus allow unthreading only over a length of about 85 mm. However, this is often not sufficient for pushing the side of the shrink tube next to the splice region, for which usually a lateral entdrillter area with a length of about 50 mm next to the actual splice region for the order of the shrink tube is needed.

task

Based on the above-mentioned prior art be summarized the invention be with the technical problem of at least partially avoiding these disadvantages and in particular to realize a reliable isolated separation of at least two splice regions of a parallel connector in a limited space.

invention

This object is already achieved by the features of the independent claims. Preferred, but not mandatory teristics are reflected in the subclaims.

The invention provides for solving this problem, a distance profile with at least one holding area for the at least one splice region, which forms an insulating Ummante ment for the at least one splice region which surrounds or encloses preferably on three sides and so isolated from the adjacent splice region. Furthermore, only a heat-shrinkable tube with a hot melt adhesive ("hot melt") arranged therein is provided, which encloses the at least two splicing regions in an electrically insulating and waterproof manner becomes liquid during the shrinking process and cures after

Shrink off to realize the insulation effect.

In the simplest embodiment, the spacer profile has at least one channel-shaped or tubular holding area with an upper-side opening or a slot into which the splicing area is received in the installation position, in which the splice area can be inserted, pressed in or even snapped.

In the preferred embodiment, the spacer profile on several separate holding areas, which is separated from an adjacent holding area by a partition electrically insulating.

Preferably, the spacer profile is designed for receiving two separate splice regions, thus having two separate, in particular channel or channel-shaped holding regions for receiving in each case a splice region.

In a preferred embodiment, the Distanzpro fil two substantially parallel to each other erstreckende, trough or trough-shaped holding areas for ge separated receiving the splice regions, which are separated by a central partition.

The spacer profile thus has a shape for the separate electrically insulating receptacle of at least two splice regions and keeps these at least two splice regions in the installed position as effectively electrically separated from each other.

Thus, according to the invention a parallel connector with at least two or adjacent splice regions is gebil det. Furthermore, the arrangement according to the invention comprises a heat-shrinkable tube with adhesive arranged therein, in particular a known hot-melt adhesive for enclosing and / or sealing the spacer profile in the installed position, but only one

Shrink tubing for two or more splice areas. In the preferred embodiment, the Distanzpro fil includes at least one partition, which separates the holding areas and these recorded splice areas from each other or spaced.

Preferably, the distance profile is about 10 to 20 percent longer than the recorded in this splice area out forms. Preferably, the splice area is arranged centrally in the spacer profile, so that the spacer profile the

Splice area overhangs at both ends.

An even more effective insulation can be realized if the spacer profile has at least two channels, notches or depressions spaced over the partition wall, which surrounds each splice region in the installation position, preferably a snap-action.

Embodiments provide that the splice areas in the holding areas in installation position under bias, for which the material of the spacer profile is elastic and a Lich ter cross-section of the holding portion is slightly smaller than the usual outer diameter of a male Splice Rich. This can also take place in that the Hal tebereiche undercuts for receiving the splice regions, so that the splice regions so snap into the formed on the holding portions undercuts or engage.

Other embodiments provide the formation of the distance profile as coex-profile, which is coated on the inside with the hot melt adhesive as an inner adhesive (hot melt).

After introducing the splice region into the corresponding holding region of the spacer profile, the shrink tube is pushed with the hot-melt adhesive over the spacer profile and then shrunk, with the hot or inner adhesive entering the splice regions of the parallel connector and these additionally seals after cooling.

The spacer profile can be designed differently. As a particularly useful training as T- or double-U, C or X profile as insulation protection between the two splice regions (often referred to as "parallel connector" or through connector) or several ren splice has proven, preferably a Profile length of at least 30 mm, in order to avoid an electrical contact with each other already by the distance profile itself effectively.

The formation of the spacer profile as a double U-profile with two juxtaposed troughs, channels or channels, which are spaced apart from each other by an intervening partition from egg ner, is associated with the advantage that the splices are particularly easy onions in these channels positi to let.

According to the method, this object is achieved in that at least one splice region is arranged in a previously described dance profile, which electrically isolates the splice regions from each other, that a shrink tube with a hot melt disposed therein is slid onto the at least two splice regions and that the shrink tube by heating is sealed.

In order to achieve even better sealing, in a preferred further development prior to the sliding of the heat-shrink tubing onto the spliced regions, adjacent to the splice regions, splicemelt tapes can be fixed, which are then heated by the heat shrink tubing.

Preferably, the proposed multiple splice gasket is used to connect a cable harness in a car. The drawings show preferred embodiments of the invention.

Figure 1 shows a splice assembly or a multiple splice seal with three pairs of wires 1, 2, 3, each with two lines, which are entdrillt in the central connection region, the cable ends are stripped at the ends and in two splice regions 4, 5 the front side in a known Manner are interconnected.

FIGS. 2 and 3 show embodiments of spacer profiles according to the invention in the installed position.

Figure 2 shows a plan view using a trained as a double profile 6 spacer profile for the separate recording of the two splice regions 4, 5 separated in each one with a respective holding area, which via a or. a partition wall 7 are separated from each other.

In the embodiment of Figure 3, only a single profile 8 and a simple sheath is provided, which surrounds only the lower splice region 5 circumferentially, including the single profile 8 is formed as a tube having a top slot for pressing the splice region 5.

According to the embodiment in Figure 3, the trained as a single profile 7 spacer profile only an elongated, channel-like holding or receiving area for only one

Splice region 5, in which the splice region 5 hineinge suppressed.

The double profile 6 in the embodiment of Figure 2, however, has two mutually parallel, rin nenförmige holding areas for receiving ever a corre sponding splice area 4, 5, wherein the holding areas are separated by a central partition 7 from each other, which is also slightly higher than that outer edges formed can be.

The spacer profiles 6, 8 are preferably so long ausgebil det that the at least one splice region 4, 5 is received on each end protruding, preferably by about 10 to 20 percent of the length of the splice region 4, 5 and the splice regions.

Figures 4 to 6 show a further development, is arranged in the Splicemeltband 9, 10 on both sides of the splice regions 4, 5 on the untwisted line insulation, with a single profile 8, but this can be done in the same way with a parallel connector 6.

In this case, according to Figure 6, the protective paper was removed up to half and the untwisted lines are fixed "parallel to each other" on the butyl of Splicemeltbands 9.

Then, according to Figure 7, the remaining protective paper ent removed, the Splicemeltband folded according to Figure 8 and squeezed together. Alternatively, a coldmelt tong can be used for the pressing process.

In Figure 9 are Splicemeltbänder 9, 10 in the manner described above be on both sides of the splice areas 4,

5 enclosing and on both sides superior distance profile fixed against slipping.

According to Figure 10, a shrink tube 11 is then pushed around the parallel connector thus formed and this

Shrink tube 11 is finally sealed according to Figures 11 and 12 by heating, whereby the outer diameter is reduced.

Individual strands of the splice regions 4, 5 could stand up and produce a short circuit. This can be avoided by using materials that occur at the Operating temperatures are not thermoplastic and thus hold down the strands. Preferred materials for the production of the spacer profile include HDPE, possibly still crosslinked.

Figures 13 to 17 show enlarged end views before zugter embodiments of spacer profiles.

The embodiment according to FIG. 13 shows an end view of a double U-profile 12 with two lateral holding sections, which protrude away from one another and thus allow particularly good insulation in a confined space.

The embodiment of Figure 14 shows an end view which is formed as X-profile 13, which thus allows the ge-separated arrangement of up to four splice regions isolated from each other, so if 3 or 4-fold twisted lines are used.

In the embodiments according to FIGS. 15 and 16, single-side slotted single profiles 14, 15 are shown on the upper side.

In the embodiment according to FIG. 16 with a profile slit on one side, the use of splicemet tapes is not necessary, because additional hot glue 15 is provided on the single profile 14 on the inside.

Figure 17 shows an enlarged cross section of the Doppelpro fils 6 with the two mutually parallel, channel-like holding portions for separately receiving the splice areas 4, 5 and the out between the holding sections formed partition 7, which also formed slightly higher than the outer edges in this embodiment can be.

Claims

Multiple splice gasket claims

1. Multiple splice gasket, in particular for use in a motor vehicle or the like, for electrical connection of at least two pairs of wires (1, 2, 3) in at least two separate splice regions (4, 5), each pair of wires (1, 2, 3) comprises a plurality of isolated insulated sheathed lines, which are twisted together to avoid interference or interference signals, but are unwound at a connection region, are stripped at the ends of lines and in at least two separate splice regions (4,

5), characterized in that for at least one splice region (5) a spacer profile (6,

8) is provided with at least one holding portion for the at least one splice region (5) and that single Lich a shrink tubing (11) with a angeord netem hot melt encloses the at least two splice regions (4, 5) electrically insulating and waterproof.

2. Multiple splice seal according to claim 1, DADURCH

FEATURES that the spacer profile (6, 8) comprises a plurality of separate holding areas, each separated from an adjacent holding area by a partition wall (7) electrically insulating.

3. multiple splice seal according to claim 1 or 2,

THEREFORE CHARACTERIZED that the distance profile in We sentlichen is designed as a T-profile that summarizes a tige partition (7) to separate the holding areas to.

4. multiple splice seal according to claim 1 or 2,

THEREFORE FEATURES that the distance profile is substantially formed as a double U-profile with two holding areas separated by a middle partition (7) for receiving two splice areas (4, 5).

5. Multiple splice gasket according to claim 1 to 4, characterized in that the holding areas are formed as tubes, notches, depressions or grooves which surround the splice areas (4,5) in the installation position multi-sided, preferably three sides.

6. Multiple splice gasket according to one of the preceding claims, characterized in that the distance profile is elastic, so that the at least one splice region (5) can be snapped into the at least one holding region.

7. connection method for electrically isolated and what serdichten connection of at least two frontally adjacent splice regions (4,5) of at least two pairs of lines (1, 2, 3), wherein each Lei processing pair (1, 2, 3) a plurality, isolated separately umman telte includes lines that are twisted together to avoid interferences or interfering signals, but are unraveled at a connection area, stripped at cable ends and in at least two separate splice areas (4, 5), the DIGURCH FEATURED THAT at least one

Splice area arranged in a spacer profile (6.8) which electrically isolates the splice regions from each other, that a shrink tube (11) with a hot melt arranged thereon on the at least two splice regions (4,5) is pushed and that the shrink tube is sealed by heating.

8. Connection method according to claim 7, THEREFOR

CHARACTERIZED BEFORE pushing the shrink tube (11) onto the splice regions (4, 5) the untwisted lines adjacent to the splice regions (4, 5) are fixed on at least one splice band (9, 10) and of the splice band Heat shrink tubing (11) to be heated with.