JP2533639Y2 - Connection structure of long insulating sleeve band for electric wire connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a connection structure of a long insulating sleeve band for a wire connector having a plurality of synthetic resin insulating sleeves for fixing and holding a wire connector element. It is.

<Prior art> Conventionally, as this kind of insulating sleeve band, a plurality of insulating sleeves for inserting and holding an electric wire connector element are combined in a state of being connected by a joint plate at a parallel posture and at an appropriate interval from each other. A unit length insulating sleeve band integrally formed of a resin material, wherein the connecting plate portion at one end in the longitudinal direction of one insulating sleeve band is the other end of another insulating sleeve band of the same shape already formed. The structure in which a large number of insulating sleeve bands having the above-mentioned unit length are integrally connected to the connecting plate portion on the side during molding by molding is as previously proposed (Japanese Patent Publication No. Sho 61). -10946 publication).

<Problem to be Solved by the Invention> The above-mentioned long insulating sleeve band for the electric wire connector is formed by successively replenishing unit-length sleeve bands and connecting them by molding, so that the long ones are molded at once. Although the mold can be made smaller than in the case, there is an advantage that the equipment cost is low and the productivity is good,
In particular, there is a problem that the resistance to tensile in the longitudinal direction is not always sufficient.

For this reason, the inventor of the present invention has previously proposed a configuration in which the connection plate portion on one end side is formed so as to be sandwiched between the side U-shaped connection plate portions on the other end side of the next insulating sleeve band. However, in this case, the already-formed "one" -shaped connecting plate portion inserted into the cavity for forming the "U" shape is used for the molten resin flowing through the sprue, the runner and the gate. There is another problem that the cavities tend to be pressed against the upper or lower wall of the cavity, and the fusion of the sandwich sandwiched in the center of the "U" is not always guaranteed.

Therefore, the present invention improves the connecting plate formed at one end of the insulating sleeve strip of unit length, simplifies the structure of the mold, can be formed uniformly without any molding defects, and can be formed between two adjacent insulating sleeve strips. It is an object of the present invention to provide a connection structure of a long insulating sleeve band for an electric wire connector, which can always guarantee a sufficient bonding strength.

More specifically, the present invention provides the above-mentioned connection structure suitable for eliminating the variation in the relative positional relationship between the connecting plate portion formed by the preceding molding and the connecting plate portion formed by the subsequent molding, so that the connecting plate portion always takes a predetermined posture inside the cavity during the subsequent molding. With the goal.

<Means for Solving the Problems> The configuration of the present invention for achieving the object will be described with reference to the drawings corresponding to the embodiments. That is, the connecting plate portion (2A) at one end in the longitudinal direction of one insulating sleeve band (3 ') is displaced to one side in the thickness direction, and at least one protrusion (4 ) Is formed so as to project at substantially the same height as the displacement amount, and the connecting plate portion (2B) on the other end side of the next adjacent insulating sleeve band (3) is connected to one end of the preceding insulating sleeve band (3 '). The one end side connection plate portion (2A) is displaced in a direction substantially opposite to the one side connection plate portion (2A) by a substantially equal amount, and surrounds the protrusion (4).
At the connecting portion (3 '), the two connecting plate portions (2A) and (2B) are fused together in a state where the two connecting plate portions (2A) are held together at a surface substantially along the center line in the thickness direction of the other connecting plate portion (2). It is characterized by having.

The above-mentioned projection has a shape which should be called a “partial projection”, and has a variety of important meanings as described below, which does not extend over the entire width of the connecting plate portion.

The protrusions and the vertical holes in the present invention are formed in a direction toward the upper wall or the lower wall of the mold cavity, and the number thereof may be plural or singular. The shape of the projection can be an appropriate shape such as a columnar shape, an elliptical columnar shape, a prismatic shape, and the arrangement portion may be at the center of the connecting plate portion or at the distal end side. In addition, the number of protrusions is also 1 to
The number is not limited to two, but may be three to four or more.

Also, desirably, the foremost end of the connecting plate portion on the one end side protrudes in, for example, a “C” shape, and the corresponding portion of the connecting plate portion on the other end side that receives this is recessed and the foremost end is formed. It is configured to exhibit a state of being half-wrapped over its entire thickness.

<Operation> In the above connection structure according to the present invention, the bonding strength of the integrally fused portion, particularly the resistance to tensile in the longitudinal direction, is sufficiently improved. That is, the protrusion and the vertical hole are formed in a vertical direction that intersects the longitudinal direction of the insulating sleeve band, and the protrusion penetrates over the entire height of the mating connecting plate portion, and a “bar” locking This is because they are acting.

Further, in the above-described preferred form, the leading end of the one end side connection plate portion is partially cut into the other connection plate portion, for example, in the shape of a “く”, so that the integrally fused portion has a longitudinal direction and a thickness. In this case, a fusion surface is provided in both directions, so that not only an external force applied in the longitudinal direction but also a sufficient resistance force against an external force applied in the thickness direction is exhibited.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a plurality of cylindrical insulating sleeves (1) for inserting and holding a crimp terminal (A) as an electric wire connector element, and a connecting plate portion for connecting these sleeves in parallel with each other at appropriate intervals. And (2) are integrally molded with a synthetic resin to form an insulating sleeve band (3) having a unit length. These insulating sleeve strips (3) are connected in the longitudinal direction one after another at the same time as the molding, as described below, to form a long insulating sleeve strip.

As shown in FIGS. 2 to 4, a mold (6) including an upper split mold (6A), a lower split mold (6B) and a core mold (6C) is used to first form an insulating sleeve band of unit length. 3 ') is molded. The sleeve band (3 ') is provided with a connecting plate (2A) formed in a special cavity (6E) at one end of the mold (the right end in FIG. 2). The columnar projections (4) of the connecting plate are erected in a direction perpendicular to the connecting plate.

In the connecting portion connected in this way, the connecting plate portion (2A) at one end of one sleeve band (3 ') is displaced downward in the figure, and the projection (4) is displaced in the direction of this displacement. The connecting plate (2A) projects upward from the opposite surface to the same height as the displacement of the connecting plate (2A), and the connecting plate (2B) at the other end of the next sleeve band (3) Contrary to the connecting plate portion (2A) of the one sleeve band (3 '), the displacement amount is substantially equal to the displacement amount of the connecting plate portion (2A) of the one sleeve band (3') in the upward direction in the figure. The connecting plate portions (2A) and (2B) are displaced and are fused to each other along a surface substantially along the center line in the thickness direction of the other connecting plate portion (2).

After molding in this manner, the upper mold is retracted upward, the core mold (6C) inserted into the insulating sleeve (1) is raised, and the insulating sleeve band (3 ') is pressed by a chuck (not shown) while being held. Pull out the core from the sleeve. Next, the insulating sleeve band is moved to the other end of the mold by the check (the state shown in FIG. 4), and the connecting plate portion (2A) is housed in another special cavity (6D) arranged there. Then, the insulating sleeve band (3 ') is lowered, the core mold and the mold are set again (the state shown in FIG. 3), and then the molten resin is press-fitted. At this time, since the columnar projection corresponds to the entire height of the cavity (6D), the posture of the connecting plate (2A) is kept stable.

Therefore, as is apparent from FIG. 1, the connecting plate portion (2A) of the insulating sleeve band (3 ') which has been formed first and the connecting plate portion (2B) of the insulating sleeve band (3) formed later. Is fused together in a tied state, and at this time, the protrusion (4)
A vertical hole (5) in a tightly fitted state is formed in the latter connecting plate portion (2B), and the projection is a "bar" with respect to the connecting plate portion.
A locking effect is also provided.

By repeating the molding operation in this way,
A long insulating sleeve strip of the present invention is manufactured. Since the fused connection plate portions (2A) and (2B) are very firmly integrated, there is no possibility that the connection plate portions (2A) and (2B) are peeled off even when subjected to a longitudinal tensile force when the crimp terminal is mounted in the automatic machine. .

In FIG. 3, the upper end of the projection (4) of the molded connecting plate portion (2A) placed on the bottom (S) of the cavity (6D) is in contact with the upper wall surface (J) opposed thereto. Therefore, the connecting plate portion supported by the projections maintains its own posture, and the connecting plate portion is raised irregularly regardless of the state of the molten resin flowing in the subsequent molding operation. There is no danger of taking a posture.

 Next, another embodiment of the present invention will be described.

In the example shown in FIG. 5, the projections (4) of the connecting plates (2A) and (2B) are elliptic cylinders. Nothing changes.

In this case, as in the examples shown in FIGS. 1 to 4, the connecting plate portion (2B) also includes a main portion (7) having a vertical hole (5),
From this, the auxiliary portion (8) branched in a “Y” shape forms a “ku” -shaped recessed portion (9) to receive the foremost portion of the connecting plate portion (2A), and the base portion (10) and the They are one. Thereby, the fusion strength between the two connecting plate portions is further increased not only in the longitudinal direction but also in the thickness direction orthogonal to the longitudinal direction.

6 is different from the examples of FIGS. 1 to 5 in that one prismatic projection (4) is provided at the center of the connecting plate (2A) on the front end side.
In the example of FIG. 7, a prismatic projection (4) is provided.
Are erected at both ends on the distal end side of the connecting plate portion (2A), however, there is almost no difference in operation and the like.

Although the embodiments that are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to the structure of these embodiments, but includes the components described in the present invention,
In addition, the present invention achieves the object of the present invention and can be appropriately modified and implemented within a range having the following effects.

<Effects of the Invention> As is clear from the above description, according to the connection structure of the long insulating sleeve band for the electric wire connector, the opposing connection plate portions have the protrusion provided on one of the connection plate portions. As described above, the joint strength is improved because the parts are integrated through the part.

Another advantage of the present invention is that there is no risk that the horizontal attitude of the connecting plate portion will be impaired in a subsequent forming operation performed while holding the formed connecting plate portion in the special cavity.

Further, since the projection is a partial projection, when subsequent molding placed inside the cavity is performed, the molten resin may flow smoothly around the projection, which may hinder the molding operation. Nor.

Further, there is an advantage that the structure of the mold can be simplified, and a long band with a uniform connection structure can always be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing a connection structure of a long insulating sleeve band for a wire connector according to one embodiment of the present invention, and FIG. 2 is an enlarged cross section showing a mold for manufacturing the insulating sleeve band. FIG. 3 is a cross-sectional view showing a manufacturing process, FIG. 4 is an enlarged exploded perspective view of the same, and FIGS. 5 to 7 are perspective views of main parts showing another embodiment. In the figure, (1) is an insulating sleeve, (2) is a joint plate, (2)
A) and (2B) are connecting plate portions, (3) and (3 ') are insulating sleeve bands, (4) is a protrusion, and (5) is a vertical hole.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hisakura Yamagata 1-358, Tsurumi, Tsurumi-ku, Osaka-shi, Osaka Nichifu Terminal Industry Co., Ltd. (56) References JP-A-57-63782 (JP, A) JP-A-63-27218 (JP, A) JP-A-64-8809 (JP, A)

Claims (1)

(57) [Scope of request for utility model registration] A plurality of insulating sleeves (1) for inserting and holding an electric wire connector element are made of a synthetic resin material in a state where they are connected by a joint plate (2) in a parallel posture and at an appropriate interval from each other. A long strip body in which a plurality of unitary length insulating sleeve strips (3) and (3 ') are integrally connected in the longitudinal direction, and the length of one insulating sleeve strip (3') is long. The connecting plate part (2A) at one end in the direction is displaced to one side in the thickness direction, and at least one projection (4) is formed so as to project from the surface opposite to the displacement direction in the vertical direction at substantially the same height as the displacement amount. And the connecting plate (2B) at the other end of the next adjacent insulating sleeve band (3) is connected to the preceding insulating sleeve band (3 ').
In the opposite direction to the connecting plate portion (2A) on one end side, and displaces by substantially the same amount as the connecting plate portion (2A) on the one end side, and surrounds the projections (4) to form both insulating sleeve bands (3), (3 '). ), The two connecting plates (2A) and (2B) are integrally fused together with the other connecting plate (2) held together by a surface substantially along the center line in the thickness direction. The connection structure of a long insulating sleeve band for a wire connector, characterized by the following.