JPS6110946B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an insulating sleeve made of synthetic resin for fixing and holding an electrical connector element in a state in which it is inserted. A long insulating sleeve band for an electrical connector, which is connected in a band shape at intervals, and more specifically, a plurality of insulating sleeves are integrally connected at intervals through synthetic resin band-shaped connecting plate parts. A unit-length insulating sleeve band is formed by molding the insulating sleeve band, and a band-shaped connecting plate integrally protruding from one longitudinal end of this insulating sleeve band and another insulating sleeve band similar to the above in the longitudinal direction. The two insulating sleeve bands are integrally connected in their longitudinal direction by welding and integrally joining the band-shaped connecting plate portion integrally projected from the other end side during molding of the latter insulating sleeve band. related to things.

Such a long insulating sleeve band for electrical connectors is
For example, compared to a method in which individually manufactured insulating sleeves are connected into a long series by taping in a subsequent process, it is possible to improve productivity, reduce costs, and improve the accuracy of sleeve pitch, sleeve posture, etc. Not only can it be used, but it is also constructed by sequentially adding unit lengths of insulating sleeve strips by molding, compared to those constructed by molding a predetermined length all at once. Therefore, the mold for molding can be small,
Although it is advantageous in terms of equipment cost and can be manufactured with only one step of molding a unit length insulating sleeve band, it has the advantage of superior productivity. In this case, the insulating sleeve bands are connected to each other by connecting the band-like connecting plate portions at the ends of the insulating sleeve bands, and the connecting portion is formed by connecting the band-like connecting plate portions between adjacent sleeves at the intermediate portion of the insulating sleeve band. Since the entire structure is not integrated as a series, for example, as shown in FIG.
If only 1' are polymerized and bonded together, the connection strength of this bonded part will be insufficient, and the bonded part will be damaged unexpectedly when the product, that is, the long insulating sleeve band 02, is rolled up and stored or sent for crimping. It is easy to cause troubles such as breakage or deformation.

To explain this based on the action explanatory diagram of FIG.
1 and 01' are in the state shown in Figure A when no tensile force is applied in the longitudinal direction of the insulating sleeve band, and when a longitudinal tensile force is applied as shown by arrows F and F', the connecting portion are not vertically symmetrical with respect to the center line P, so the overlapping plane S is inclined to intersect with the center line P, as shown in FIG.
In this state, tensile stress acts intensively on the starting end of the overlapped surface S, and especially at the end S ₁ of the overlapped surface S,
Separation of the overlapping surface S tends to occur near S ₂ , and as shown by the imaginary line in the figure, both belt-shaped connecting plate parts 01 and 01'
There is a risk that they may separate.

In view of this point, the present invention provides that the coupling action between the band-like connecting plate portion of the insulating sleeve band and the band-like connecting plate portion of another insulating sleeve band is performed simultaneously at the time of molding the separate insulating sleeve band, that is, The purpose is to make the connection strength of the connection part sufficiently large by effectively utilizing the fact that the shape of both band-like connection plate parts can be freely set to a complex one without impairing productivity. have

In order to achieve the above object, the present invention is characterized in that a plurality of synthetic resin insulating sleeves for fixing and holding an electrical connector element in an inserted state are connected to a synthetic resin band-shaped connecting plate at a distance from each other. A unit-length insulating sleeve band is formed by molding to be integrally connected through the insulating sleeve band, and a band-shaped connecting plate portion integrally protruding from one end side in the longitudinal direction of this insulating sleeve band, and a By welding and integrally joining the band-shaped connecting plate portion integrally projected from the other end of the formed insulating sleeve band in the longitudinal direction when the latter insulating sleeve band is molded, both insulating sleeve bands are connected to each other. In the long insulating sleeve band for an electrical connector configured to be integrally connected in the longitudinal direction, one of the band-shaped connecting plate portions of the band-shaped connecting plate portions protruding from both ends in the longitudinal direction of each of the insulating sleeve bands is: The present invention is constructed in such a way that the other band-shaped connecting plate portion is bifurcated so as to be sandwiched from both sides in the thickness direction and the other band-shaped connecting plate portion is sandwiched and welded.

As mentioned above, the shape of the band-shaped connecting plate parts is devised so that the insulation sleeve bands are welded and connected with one band-shaped connecting plate part sandwiching the other band-shaped connecting plate part from both sides in the thickness direction. Compared to a structure in which only one side of the insulating sleeve is polymerized, it is possible to greatly expand the contact area of the overlapping joint between the two strip-shaped connecting plate portions, as well as to increase the tension in the longitudinal direction of the insulating sleeve strip. When force is applied, it is possible to avoid the situation where the polymerized surface crosses diagonally with respect to the tensile direction, which occurs when the polymerized surface is polymerized on only one side, which makes it easy to peel off from the edge of the polymerized surface. As such, in the present invention, the connecting welded portion is configured vertically symmetrically with respect to the virtual plane along the intermediate position in the thickness direction of the connecting portion, so that the welding surface is maintained in a state along the direction of action of the tensile force. You can obtain the effect of

As a result of obtaining the above-mentioned effects, the present invention has the advantage of increasing the bonding strength at the connection points between the band-shaped connecting plate parts, and it is possible to avoid separation of unit length insulating sleeve bands as much as possible. A long insulating sleeve for an electrical connector can be obtained.

Embodiments of the present invention will be described below based on the drawings.

As shown in FIGS. 1A and 1B, a small diameter cylindrical portion 1A into which the proximal cylindrical portion a of a crimp terminal A (an example of an electrical connector element) can be inserted and held from one end side.
and a large-diameter tube that can be inserted from the other end side into a state where the electric wire end portion B and the conductive wire tip portion b from which the insulation coating has been removed are inserted into the base end tube portion a. The crimp terminal is formed by applying a mechanical force to the small diameter portion 1A from the outside to plastically crush the small diameter cylindrical portion 1A with both A and B inserted. It consists of a large number of synthetic resin insulating sleeves 1 arranged side by side at appropriate intervals for fixing and holding the conductive wire tip part b in an electrically connected state, and is wound as shown in FIG. A removable long insulating sleeve band is obtained, which is manufactured by the following process.

That is, a plurality of insulating sleeves 1... and a synthetic resin band-shaped connecting plate part that integrally connects these sleeves at appropriate equal intervals in a large diameter cylindrical part 1B with the element insertion ports in a parallel position with a fixed orientation. 2...
An insulating sleeve band 3 of unit length consisting of... is connected to a pair of external forming molds 4A and 4A' which can be freely connected and separated in the thickness direction of the band-shaped connecting plate portion 2... and in the thickness direction. Molding is carried out using a mold 4 that is divided into a pair of molds 4A and 4A' in orthogonal directions and an internal molding mold 4B that can be inserted into and withdrawn from the molds 4A and 4A'. Next, the band-like connecting plate portion 2A on one longitudinal end side of the unit insulating sleeve band 3 formed previously is connected to the band-like connecting plate portion 2A on the other longitudinal end side of the unit insulating sleeve band 3 to be formed next using the mold 4. Molding equivalent space portion 4a of plate portion 2B
By performing the next molding in the state where the unit insulating sleeve band 3 is inserted and held, the band-shaped connecting plate portion 2B at the end of the unit insulating sleeve band 3 is formed into a band-like connection at the tip of the unit insulating sleeve band 3 that was previously molded. Welded to the plate part 2A, both belt-shaped connecting plate parts 2A, 2
B is manufactured as a unitary unit, and 2
A unit length of insulating sleeve strip is manufactured. and,
By repeating such molding means, a plurality of unit insulating sleeve bands 3 are connected to produce a continuous long insulating sleeve band of a desired length.

The specific structure of each part of the long insulating sleeve band manufactured in the above process will be explained.

The insulating sleeve band 3 of unit length molded in one process is made by arranging a plurality of insulating sleeves 1 side by side at appropriate regular intervals, and forming large diameter cylindrical portions 1B of adjacent insulating sleeves 1... ...The synthetic resin band-shaped connecting plate part 2 is connected to each other during molding.
The unit insulating sleeve bands 3, 3 are connected to each other in a series, and band-shaped connecting plate parts 2A, 2B for connecting the unit insulating sleeve bands 3 , 3 are molded at positions closer to the ends than the insulating sleeves 1, 1 at both ends, respectively. They are integrally connected as a result of molding.

The band-shaped connecting plate portion 2 formed by the above-mentioned molding is formed by bending the root portion 2a of the band-shaped connecting plate portion 2 to the insulating sleeve 1 to form the insulating sleeve band 3. The band-shaped connecting plate portion 2 is thin-walled so as to enable the above-mentioned winding.
A locking hole 5 for continuous feeding is provided in the thick portion 2b of...
has been formed.

Among the band-like connecting plate parts 2A and 2B at both ends, the entire one-end side band-like connecting plate part 2A is configured to have the same thickness as the thin root part 2a of the band-like connecting plate part 2, and its tip part is Band-shaped connecting plate part 2 on the end side
Insertion part 6 for embedding in B in the thickness direction
In addition, one large diameter hole 7 is provided in the middle portion of the one end side band-shaped connecting plate portion 2A.

The other end side band-like connecting plate part 2B and the one end side band-like connecting plate part 2A are integrally connected together by molding the other end side band-like connecting plate part 2B.
This is done by welding the overlapping surfaces of A and 2B to each other, and the entire locking hole 5 has the same shape and size as the band-shaped connecting plate portion 2 of the unit insulating sleeve band 3. The other end side band-shaped connecting plate portion 2B is configured to be an incidental connecting plate portion 2.
There are provided opposing plate portions 9, 9 formed in a bifurcated shape so as to sandwich the middle portion of the one end side band-shaped connecting plate portion 2A from the thickness direction, and the opposing plate portions 9, 9 are provided with the opposing plate portions 9, 9. Holes 8, 8 which form the locking hole 5 described above are formed with the large diameter hole 7 of the one end side band-shaped connecting plate portion 2A.

To explain the elongation of the band-like connecting plate parts 2A , 2B in response to the tensile force at the connection point between the band-like connecting plate parts 2A, 2B of the insulating sleeve band 3 configured as described above, as shown in FIG. Even if the forces F and F′ act, both opposing plate portions 9,
Since the welding surfaces of the connecting plate 9 and the one band-shaped connecting plate 2A are vertically symmetrical with respect to the center in the thickness direction, no undue stress is generated. Therefore, it will not be damaged.

In addition to the above embodiments, the long insulating sleeve band according to the method of the present invention may have an insulating sleeve band 1' having a structure as shown in FIG. 6, or a structure as shown in FIG. Mention may be made of those having an insulating sleeve 1''.

The insulating sleeve 1' shown in FIG. 6 has two parts on the open end side of a small-diameter cylindrical part 1A' with a bottom into which a cylindrical member A' for crimping and connecting two electric wire ends B and B can be inserted and held. The insulating sleeve 1'' shown in FIG. Large diameter cylindrical parts 1B', 1B' into which two electric wire ends B, B can be inserted from opposite directions are provided on both sides of a small diameter cylindrical part 1A'' into which a cylindrical member A'' for crimp connection can be inserted and held. Both insulating sleeves 1' and 1'' are connected to the small diameter cylindrical part 1.
By applying external mechanical force to A', 1A'' and crushing the small diameter cylindrical parts 1A', 1A'', the three cylindrical members A', A'' and the wire ends B, B... This is to securely maintain the electrical connection.

FIG. 8 shows another embodiment of the long insulating sleeve band, in which in place of the continuous feed locking hole 5, a continuous feed locking protrusion 5' is shown in the previous embodiment.
It has been established.

In this specification, welding refers to a state in which a portion of the molecules of one synthetic resin partially enters the other synthetic resin and the two are connected.

[Brief explanation of the drawing]

The drawings show an embodiment of the elongated insulating sleeve band for an electrical connector according to the present invention, and FIG. A perspective view of the band, Fig. 3 is a side view showing the manufacturing procedure, Fig. 4 is an enlarged sectional view of the mold, Fig. 5 is a partially cutaway side view of the insulating sleeve band connection part, Figs. The figure is a longitudinal sectional view of the insulating sleeve. FIG. 8 is a perspective view showing another embodiment of the insulating sleeve band. FIG. 9 is an explanatory diagram of the operation. FIG. 10 shows a conventional connecting portion, and FIGS. 11A and 11B are explanatory diagrams of its operation before being stretched and in a stretched state. DESCRIPTION OF SYMBOLS 1...Synthetic resin insulating sleeve, 2...Synthetic resin band-shaped connecting plate part, 2A, 2B...band-shaped connecting plate part, 3 ...Insulating sleeve band, 4...Divided mold.

Claims (1)

[Claims] 1. A plurality of synthetic resin insulating sleeves 1 for fixing and holding an electrical connector element in an inserted state are integrally connected via synthetic resin band-shaped connecting plate parts 2 at intervals. The insulating sleeve band 3 of unit length is formed by molding into a state where the insulating sleeve band 3 has a unit length, and the band-shaped connecting plate portion 2A integrally projects from one end side in the longitudinal direction of the insulating sleeve band 3 , and the same as the insulating sleeve band 3 . By welding and integrally joining the band-shaped connecting plate portion 2B integrally projecting from the other longitudinal end side of the formed other insulating sleeve band 3 during molding of the latter insulating sleeve band 3 , both insulating sleeves A long insulating sleeve band for an electrical connector, which is constructed by integrally connecting bands 3 , 3 in the longitudinal direction thereof, and each insulating sleeve band 3 has both band-shaped connecting plate portions protruding from both ends in the longitudinal direction. 2A, 2
Among B, one of the strip-shaped connecting plate portions 2B is configured to be bifurcated so as to sandwich the other strip-shaped connecting plate portion 2A from both sides in the thickness direction and sandwich and weld the other strip-shaped connecting plate portion 2A. A long insulating sleeve band for electrical connectors, characterized by: 2. Claim 1, characterized in that each of the intermediate strip-shaped connecting plate portions 2 and the integrally coupled strip-shaped connecting plate portions 2A and 2B at both ends each have a locking portion 5 for continuous feeding. A long insulating sleeve band for electrical connectors as described in . 3. Both of the band-shaped connecting plate parts 2A and 2B are characterized in that, when they are integrally connected, they have the same shape and the same size as the band-shaped connecting plate part 2 located at the longitudinally intermediate portion of each insulating sleeve band 3 . An elongated sleeve band for an electrical connector according to claim 1 or 2.