JPH0631674Y2 - Insulation sleeve band - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a belt-shaped body formed by endlessly connecting a plurality of insulating sleeves for accommodating and holding various crimp terminals such as faston type terminals.

<Prior art> A crimp terminal, for example, a Faston-type terminal, has a bending spring portion integrally formed with a cylindrical portion of an inner diameter of an elastic metal plate made of brass or the like, in which one end of the elastic metal plate material is closely fitted to a bare wire. It is generally in the shape provided with. The spring portion is formed by bending opposite side edges of the plate member into a half-split cylinder shape and providing a gap between the bottom plate and the bottom plate so that another tongue-shaped contactor can be elastically held. Therefore, the spring portion is not symmetrical on the front and back sides, and therefore, for the purpose of distinguishing the front and back sides from the square tubular portion of the insulating sleeve that accommodates and holds the spring portion, the central portion of the tubular wall on one side is longitudinally aligned along the axial direction. The one with the structure raised in the direction has already been put to practical use.

However, in a case in which a plurality of insulating sleeves are juxtaposed and connected in a strip shape, in a case where a so-called insulating sleeve strip is manually and rapidly loaded repeatedly, the strips are loaded upside down, or It is extremely difficult to eliminate the erroneous operation of inserting the faston type terminals themselves upside down. That is, there is a dilemma that defective products are generated at a considerable rate, and if it is attempted to eliminate them, the work efficiency is significantly reduced.

The ridge in the longitudinal direction of the central portion of the cylindrical wall of the insulating sleeve square tube portion has the effect of facilitating the dissipation of heat generated during energization and use after the terminal is mounted, and also as a guide for loading the terminal, or Allows elastic deformation when loading is performed in a tightly fitted state, and also allows some deformation to absorb stress that is transmitted when the terminal is crimped from the outer surface of the sleeve to the bare wire end. Has the effect of.

Therefore, the erroneous operation as described above should be prevented as much as possible.

<Problems to be solved by the invention> However, there is a problem in that it is impossible to avoid a decrease in work efficiency as far as the attention of the worker is relied on, and it is impossible to eliminate any erroneous operation.

Therefore, an object of the present invention is to provide an insulating sleeve band having a structure in which a crimp terminal can be inserted with high efficiency without requiring any special attention and, in the meantime, there is no fear of hindering the subsequent automatic crimping work. is there.

<Means for Solving the Problems> In order to achieve the above-mentioned problems, according to the present invention, from the one end side to the other end side of the large-diameter tubular portion into which the covering portion of the wire end portion is to be inserted,
A plurality of insulating sleeves integrally formed with a rectangular tubular portion wider than the small diameter tubular portion via the small diameter tubular portion are provided on the axis of the large diameter tubular portion between the middle and middle portions of the large diameter tubular portion. In the case of being connected in a state of belonging to the same plane via a connecting portion joined in the vertical direction, the rectangular tubular portion has outwardly expanded ridges formed on both front and back surfaces along the axial direction. At the same time, there is provided an insulating sleeve band characterized in that the respective portions and the connecting portions of the insulating sleeve occupy symmetrical positions both on the left and right sides and on the upper and lower sides with respect to the axis.

<Operation> The central axis of each insulating sleeve that constitutes this insulating sleeve band is included in the same plane, and even when looking at the individual sleeves, the respective parts and joints are located symmetrically in all the left, right, up, and down directions with respect to the axis. Therefore, even if this insulating sleeve band is loaded upside down on the automatic crimping machine, it will take the same posture. Therefore, no matter whether the crimp terminals are inserted in the front or back direction, the relative postures with respect to the insulating sleeves are always the same.

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

FIG. 1 is a plan view of an insulating sleeve band in one embodiment. In the figure, reference numerals (1), (1) ... Indicate individual insulating sleeves, and adjacent insulating sleeves (1), (1) are both Tether (2)
Are connected to each other via the. As is apparent from FIGS. 6 and 9, each insulating sleeve (1) is
From the one end side to the other end side of the large-diameter tubular portion (3) into which the covering portion (d) of the electric wire end portion (D) is to be inserted, the small-diameter tubular portion (4) is inserted through the small-diameter tubular portion (4).
This is a structure in which a rectangular tubular portion (5) wider than that is integrally formed. And the connecting part (2) between the middle-belt parts of the large-diameter cylindrical part (3) is a central axis line that penetrates the large-diameter cylindrical part (3), the small-diameter cylindrical part (4) and the rectangular cylindrical part (5). It is joined in a direction perpendicular to (C) (see FIGS. 1 and 7).

The feature of the present invention is that the rectangular tubular portion having a substantially rectangular cross section.
On both front and back sides of (5), protruding ridges (6) protruding outward are formed parallel to the central axis (C), and each insulating sleeve (1) is related to the axis (C). The respective parts (3), (4) and (5) and the connecting parts (2) and (2) occupy symmetrical positions both on the left and right sides and on the top and bottom sides.

The Faston type crimp terminal (A) inserted from the opening side of the rectangular tubular portion (5) has an inner diameter cylindrical portion (7) in which one end of an elastic metal plate material such as brass is fitted closely to the bare wire. On the other end side, bending spring parts (8), (8) are continuously provided integrally with the cylindrical part (7), and the spring part (8) is formed by cutting the opposite side edges of the plate member into half parts. The structure is such that it is bent into a split tube shape and a gap is provided between the bottom plate (9) and the tongue-shaped contactor (not shown) so that it can be elastically held. Therefore, with respect to the spring parts (8) and (8), the terminals are not symmetrical with respect to the front and back.

In use, as shown in Fig. 1, the insulating sleeve band is conveyed, for example, in the direction of the arrow (T) toward the automatic crimping machine, and as shown in Fig. 6 in front of the crimping station equipped with the crimping die. (A) is inserted into the rectangular tubular portion (5) of the insulating sleeve (1) from the cylindrical portion (7) first, and the large diameter tubular portion (3) and the small diameter tubular portion (4) of the insulating sleeve are inserted. Annular projection between
(10) It is pushed until it hits (see Fig. 7). The crimp terminal (A) may be inserted with its front side facing up as shown by the solid line in FIG. 6 or with its back side facing up as shown by the chain line. sleeve
The relative attitude to (1) does not change.

In the crimping station, the insulation coating portion (d) of the wire end portion (D) is inserted until it hits the annular projection (10), and then the small diameter tubular portion (4) is clamped by a crimping die,
It is depressed (4a) as shown in FIG. Therefore, the small diameter tubular portion
The cylindrical portion (7) of the terminal (A) located in (4) is crimped to the internal bare wire portion (e) of the terminal so that it cannot be separated from it thereafter.

After this crimping, the connecting portions (2) and (2) are cut off from the positions of the arrows (Y) and (Y) in FIG. 1 to be in the state at the right end in FIG.

In addition, in FIG. 6, the terminal (A) after being attached to the insulating sleeve (1)
A tongue-shaped contactor (not shown) is inserted into the terminal, but at that time, the stopper (11) at the inner part of the bottom plate (9) of the terminal (A) regulates the insertion limit position. Further, the number (5a) in the figure is a tapered portion provided in the transition region from the rectangular tubular portion (5) to the small diameter tubular portion (4). This tapered portion (5a) has the effect of evenly distributing the stress during crimping of the terminal over the entire circumference of the rectangular tubular portion (5), and in combination with the presence of the ridge (6), the crimping operation is easy. And is useful in preventing damage to the insulating sleeve after crimping.

For this embodiment described above, for example, as shown in FIG. 10, the protrusions (6) projecting on both the front and back surfaces of the large-diameter tubular portion (5) are trapezoidal instead of partial arc-shaped, Alternatively, as long as they are asymmetrical on the front and back sides, the specific shape or relative shape of the large-diameter tubular portion (3), the small-diameter tubular portion (4), and the rectangular tubular portion (5) can be applied to fit any terminal other than the Faston type terminal. It is possible to make modifications such as dimensional relationships other than those shown in the drawing, and to make the ridges (6) slightly thinner than other adjacent parts in order to further improve the stress absorbing action described later. it can.

<Effect of the Invention> As is clear from the above, according to the present invention, the insulating sleeve manufactured by injection molding or the like can be formed into a rational shape as described above without complicating the manufacturing process. Moreover, as a further noteworthy effect, as shown in FIG. 9, the stress transmitted from the small diameter tubular portion to the rectangular tubular portion, which is deformed by pressure from both the front and back surfaces, is
Since it is smoothly absorbed by the protrusions formed on the front and back surfaces of the tubular portion, there is no risk of causing permanent strain or residual stress in the tubular portion, and the durability of the terminal with the insulating sleeve after crimping is also improved. become.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG.
II-II line partial front view in the figure, FIG. 3 is II in FIG.
FIG. 4 is a sectional view taken along line IV-IV in FIG. 2, FIG. 5 is a sectional view taken along line VV in FIG. 4, and FIG. FIG. 7 is a perspective view showing a crimp terminal insertion state, FIG. 7 is a sectional view taken along line VII-VII in FIG. 6, FIG. 8 is a front view taken along the line VIII-VIII in FIG. 7, and FIG. FIG. 1 is a sectional view showing a state after inserting and crimping an electric wire, corresponding to FIG.
FIG. 0 is a sectional view showing the main part of another embodiment corresponding to FIG. In the figure, (1) is an insulating sleeve, (2) is a connecting portion, (3) is a large diameter tubular portion, (4) is a small diameter tubular portion, (5) is a rectangular tubular portion, and (6) is a ridge .

Claims (1)

[Scope of utility model registration request] 1. A rectangular tubular portion (5) is integrally formed from a small diameter tubular portion (4) to the other end side of a large diameter tubular portion (3) into which a covering portion of an electric wire end is to be inserted from one end side. Multiple insulating sleeves formed
(1), (1), on the same plane through the connecting portion (2) joined in a direction perpendicular to the axis of the large-diameter tubular portion (3) between the middle-belly portions of the large-diameter tubular portion (3) In the state connected to the state belonging to the above, in the rectangular tubular portion (5), the outwardly expanded ridges (6) are formed on both front and back surfaces along the axial direction, and the insulation is related to the axial line. An insulating sleeve band characterized in that the respective portions (3), (4), (5) and the connecting portions (2), (2) of the sleeve occupy symmetrical positions both on the left and right sides and on the upper and lower sides.