JPH0229654Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a connection structure for lead wires inside and outside a liquid container. More specifically, for example, when electrical signals sent from various devices installed in the transmission of an automobile are led to the outside using lead wires,
The present invention relates to a connection structure for lead wires inside and outside a liquid container configured to reliably maintain and connect the inside and outside of a transmission in an airtight state.

BACKGROUND TECHNOLOGY Conventionally, for example, when deriving signals from various detection devices installed in an automobile transmission using a lead wire, the transmission is generally connected to the transmission as shown in FIGS. A holding member b is attached to the wall surface a of the constituting container to accommodate a connecting part e in which lead wires c and d inside and outside the transmission are connected with crimping fittings or the like. Therefore, the insertion hole f of the holding member b that accommodates the coupling part e
A filler g such as an adhesive is filled in the empty space of the lead wires c and d to block the ventilation of the lead wires c and d, which have air permeability, at the joint of the lead wires c and d.

Problems to be Solved by the Invention As in the above embodiment, in the conventional connection structure of the lead wires inside and outside the liquid container, the lead wire c on the inside of the container and the lead wire d on the outside are connected with a crimp fitting. Then, store it in the insertion hole f of the holding member, and then insert it into the insertion hole f.
A filler such as adhesive g is poured into the empty space and its upper surface to seal the inside and outside airtight through the gaps between the plurality of lead wires c and d. Since the insertion holes f that accommodate the connecting portion e are bored independently from each other, when the filler g is poured, the insertion hole f that accommodates the joint e
In some cases, air pockets were formed in some areas. As a result, ventilation is created between both ends of the joint via the air pocket that forms around the joint e due to the breathing effect due to temperature changes inside and outside the container or differences in atmospheric pressure.
Liquid in the container, for example oil in the transmission, enters the conductor part of the lead wire d from both ends of the coupling part e, that is, the conductor part of the lead wire c, and leaks out to the outside. had.

Means for Solving the Problems The present invention has been devised in view of the above-mentioned drawbacks, namely, the void in the insertion hole of the holding member that accommodates the connecting portion of the lead wire inside and outside the liquid container. In the process of pouring a filler such as an adhesive into the joint, air pockets are not caused and the joint is reliably sealed with the filler. However, the configuration is such that the plurality of insertion holes drilled in the holding member to accommodate the connecting portions of the lead wires are formed with multi-shaped grooves formed on the side surface so as to communicate with each other. The present invention is characterized by being constructed with a holding member that ensures the entry of the filler and does not cause air pockets during the pouring operation of the filler.

Function The connection structure of the lead wires inside and outside the liquid container of the present invention configured as described above functions as follows.

The multiple insertion holes of the holding member into which the coupling parts connecting the lead wires inside and outside the liquid container are inserted are formed with multi-shaped grooves on the side surface so that they communicate with each other. When pouring in, even if the top of the insertion hole is blocked, the air inside the insertion hole can freely circulate through the grooves on the side, so the air escape passage is not blocked like in the past. As a result, no air pockets are created within the insertion hole, and the filling material is reliably filled into the insertion hole. Therefore, since the joint portion of the lead wires can be reliably sealed, deterioration of airtightness due to the gap between the bundles of the plurality of lead wires at both ends of the joint portion can be reliably prevented.

Embodiment A preferred embodiment of a connection structure for lead wires inside and outside a liquid container according to the present invention will be described in detail with reference to FIGS. 1 and 2.

Reference numeral 1 denotes a lead wire, which is a bundle of a plurality of conductive wires of a predetermined thickness and covered with, for example, a heat-resistant insulating coating. Note that the lead wire 1 may be a commonly used low-voltage vinyl electric wire for automobiles depending on the location of use. One end of the lead wire 1 is connected to a detection device (not shown) mounted on the inner side X of a container 5 containing lubricating oil, such as in an automobile transmission, and the other end is connected within the holding member 4 to the lead wire 2 on the external side Y in order to derive a signal from the detection device. 2
is a lead wire, and the lead wire 2 is a member similar to the lead wire 1, and is connected to the outside of the container 5 to lead the signal from the detection device inside the container 5 to the outside. This is the lead wire for side Y. One end of the lead wire 2 is connected to the lead wire 1 by a crimp fitting 3, and the other end is connected to a predetermined device to send a signal.

3 is a crimp fitting. The crimp fitting 3 is formed by winding the lead wire 1 and the lead wire 2 into a substantially pipe shape so that the ends of the lead wire 1 and the lead wire 2 are butted against each other, respectively, with the insulation coating removed at a predetermined length. It is inserted into the metal fitting 3 facing each other, and is crimped and connected using a predetermined device. Therefore, the airtightness of the gap formed between the conductors inside the lead wire 1 and the lead wire 2, which are bundled with a plurality of conductors and covered with an insulating member, is interrupted by the joint connected by the crimp fitting 3. . 4 is a holding member. The holding member 4
houses the joint where the lead wire 1 and the lead wire 2 are connected, and fills the joint with a filler such as an adhesive to allow ventilation from the lead wire 1 inside the container to the lead wire 2 outside the container. The container 5 is sealed to prevent leakage and can be attached to the attachment hole 5a of the container 5. The holding member 4 has, for example, a large-diameter portion 4a and a small-diameter portion 4b, and a relatively shallow hole 4 in the end surface of the large-diameter portion 4a for pouring the filler 6 substantially over the entire surface.
c is formed, and the bottom surface 4d of the hole 4c is further provided with a plurality of insertion holes 4e for accommodating the joint portions of the lead wires 1 and 2 in a circular arrangement with approximately equal distances from the center. It is drilled. Furthermore, the insertion hole 4
A concentric hole 4f, which is adapted to the outer diameter of the lead wire 1, is formed from the bottom surface of the lead wire 1 so as to penetrate through the end surface side of the small diameter portion 4b. Furthermore, lead wire 1 and lead wire 2
The insertion hole 4e for accommodating the coupling part is a groove 4g that communicates with the insertion holes 4e on both sides adjacent to each other.
They are connected in an annular manner by a groove 4j, and also communicated with a sacrificial hole 4h formed in the center of the bottom surface 4d of the hole 4c. Furthermore, a groove 4k is wound around the outer circumferential surface of the small diameter portion 4b to allow the installation of an "O" ring 7 and to maintain an airtight state with the mounting hole 5a of the container 5. Furthermore, a plurality of tongue pieces 4l each having a hook portion are protruded from the end surface side of the small diameter portion 4b,
It constitutes a locking portion that prevents it from coming off when it is attached to the mounting hole 5a of the container 5. Reference numeral 5 denotes a container containing a liquid, such as an automobile transmission. 6 is a filler, for example an adhesive. Thus, the filler 6 connects the lead wire 1 and the lead wire 2 with the crimping fitting 3, and inserts the joint portion of the connection into the holding member 4, and then inserts the lead wire 1 and the lead wire 2 on the large diameter portion 4a side of the holding member 4. It is poured from the hole 4c into the insertion hole 4e and the hole 4c, which house the joint part, to fill them. 7 is an "O" ring.

The connection structure of the lead wires inside and outside the liquid container of the present invention constructed as described above operates as follows.

The plurality of insertion holes 4e of the holding member 4, which accommodate the joint where the lead wire 1 and the lead wire 2 are connected by the crimping fitting 3, are connected to each other in a diverging manner through grooves 4g and 4j, so that filling Insert the material 6 into the holes 4e and 4c.
When the filler is injected into the cavity of the joint, the filling material can be reliably injected into the joint, etc., without causing air pockets. The ventilation between the conductor parts can be maintained securely by removing the covering.

Effects of the present invention The insertion hole of the holding member that accommodates the connection part connecting the lead wires inside and outside the liquid container has a plurality of multi-shaped grooves on the side surface so that adjacent insertion holes communicate with each other. Because of this, when the filler is injected into the cavity of the insertion hole, the filler can flow quickly without creating an air pocket, which improves work efficiency. It is possible to provide a highly reliable connection structure for lead wires inside and outside the liquid container.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a connection structure for lead wires inside and outside a liquid container according to the present invention. FIG. 2 is a sectional view taken along the line A--A in FIG. 1. FIG. 3 is a sectional view showing an example of a conventional connection structure for lead wires inside and outside a liquid container. FIG. 4 is a sectional view taken along line B--B in FIG. 3. 1, 2...Lead wire, 3...Crimp fitting, 4...
Holding member, 5... Container, 6... Filler.

Claims (1)

[Scope of utility model registration request] In a structure in which the inside and outside of a liquid container are connected by a lead wire composed of multiple core wires, the lead wires inside and outside the liquid container are provided with joint parts that are connected with crimping fittings by removing the insulation coating at the tips of each other, and the lead wire. and a holding member formed in such a manner that the insertion hole, which accommodates the joint part of the liquid container and is sealed by injecting a filler material, communicates with each other through a multi-shaped groove. Lead wire connection structure.