JPS649096B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a method for automatically transporting insulated terminals in sequence, and when the terminals reach the position of the crimping die,
A method of connecting multiple wires by simultaneously inserting and crimping the bare conductor parts from which the end sheathing of the insulated wires has been peeled off into the sleeve of the terminal. A large number of insulated terminals are arranged in parallel at predetermined intervals, each consisting of a small diameter cylindrical part in which a conductive metal sleeve into which the bare end is inserted is inserted, and a connecting band is formed between the large diameter cylindrical parts. While sequentially transporting the terminal group connected through the body toward the crimping die, it is confirmed that the bare end of the electric wire is inserted into the sleeve of the insulated terminal at the position of the crimping die. The present invention relates to a method of crimping an insulated terminal group connected body, which detects the area near the tip of the small-diameter cylindrical portion using a transmission type optical sensor and automatically crimps the crimping die.

<Prior Art> In this type of conventional general method, the optical sensor is always kept in a detection operating state during the crimping operation.

<Problems to be Solved by the Invention> However, in the case of the conventional method as described above, in the peripheral wall of the small diameter cylindrical portion of the insulated terminal on the transfer direction side, the thick portion in the direction of light transmission by the sensor is exposed to light. When moving through the transmission position, there is a high possibility that the light will be blocked by the thick part and the sensor will malfunction, causing the crimping die to be crimped unexpectedly at a timing earlier than the predetermined timing. Since the small diameter cylinder part and the sleeve have been pressed and deformed, the bare conductor part of the wire can no longer be inserted into the sleeve, and therefore the insulated terminal becomes a complete loss product. It had some flaws.

<Means for Solving the Problems> The purpose of the present invention is to eliminate such conventional drawbacks, and the method of the present invention for achieving the purpose is to Cylinder part 1a
A large number of insulated terminals 1 are arranged side by side at predetermined intervals, and a small-diameter cylindrical portion 1b that holds a conductive metal sleeve 2 into which the bare end b of the electric wire A is inserted is arranged in parallel at predetermined intervals. The terminal group connected body 1A, in which the diameter cylindrical portions 1a are connected via the connecting band 5, is crimped with crimping dies 3, 4.
The crimping dies 3,
Insertion of the bare end b of the electric wire A into the sleeve 2 of the insulated terminal 1 at position 4 is detected by a transmission type optical sensor 8 acting on the vicinity of the tip of the small diameter cylindrical portion 1b. and the crimping dies 3, 4
A method for crimping a terminal group connected body with an insulating coating, in which the detection operation timing is set slightly earlier than the rotation stop time of the feed drum 6 that transfers the connected body 1A. A timer 10 linked to the detector 11 detects at least the thick wall portion 1H of the small diameter cylindrical portion 1b of each insulated terminal 1 in the connecting body 1A in the direction of light transmission by the sensor 8. The sensor 8 is characterized in that the detection operation of the sensor 8 is stopped while the portion 1h, which is twice or more thicker than the wall thickness t of the sensor 8, passes through the light transmission position of the sensor 8.

<Operation> According to the method of the present invention having the above characteristics,
The sensor is always kept in a non-detection operating state while the thick portion of the peripheral wall of the insulated terminal that is sequentially transferred, which may block the light transmitted by the sensor, passes through the light transmitting position. Sauce,
When the bare end of the wire is inserted into the sleeve, the sensor operates as expected and the crimping operation is performed at a predetermined timing.

<Example> Hereinafter, an example of the method of the present invention will be described in detail based on the drawings.

5 to 7 show an example of an insulated terminal 1 to be crimped, and as shown in an enlarged view in FIG.
and a conductor made of a highly conductive metal (generally made of copper) into which the bare end conductor part b with the end coating of the electric wire A stripped is inserted and joined.
A medium diameter cylindrical portion (corresponding to the small diameter cylindrical portion in the claims) 1b that fits and holds the sleeve 2 therein, and a side of the medium diameter cylindrical portion 1b opposite to the side on which the large diameter cylindrical portion 1a is formed. The small-diameter cylindrical portion 1c that is connected in series, and the small-diameter cylindrical portion 1
a bottom portion 1d formed on the outer end side of c, and between the small diameter cylindrical portion 1c and the medium diameter cylindrical portion 1b,
A stepped portion 1e is formed in the cylinder, and the wall thicknesses of the large, medium, and small diameter cylinder portions 1a, 1b, and 1c are made to be approximately the same thickness, and one end is expanded outward within the medium diameter cylinder portion 1b. The opened sleeve 2 is press-inserted to a position where its tip abuts on the stepped portion 1e to form an internal holding structure.

As shown in FIG. 5, a large number of insulated coated terminals 1 constructed in this manner are arranged side by side and connected integrally between the large diameter cylindrical portions 1a, 1a with a flat connecting band 5. The terminal group connected body 1A is constructed by integrally molding a white transparent synthetic resin material to improve the transmission detection function of the optical sensor described later.

As shown in FIGS. 1 and 2, the connected body 1A of the group of insulated terminals connected by the connecting bands 5 is formed by a pair of male and female crimping dies in an automatic wire connecting machine. Towards position 3 and 4,
They are sequentially transported while being guided over the gutter 7 by the feed drum 6 which has a recess 6' formed on the outer periphery, and when they reach the position of the pair of crimping dies 3 and 4, the required number of crimping dies, be it 2 or 3, is transferred. When an electric wire made by twisting the bare end conductor part b of the electric wire A with the covering part a stripped off is inserted into the sleeve, and its tip end is inserted into the small diameter cylindrical part 1c, it acts on the small diameter cylindrical part 1c. The light between the light emitter 8A and the light receiver 8B of the transmission type optical sensor 8 is blocked, the optical sensor 8 is activated, and the crimping dies 3 and 4 are automatically crimped, and the medium diameter cylindrical portion 1b and The sleeve 2 is pressed and deformed from the outside, and the eighth
As shown in the figure, the cutting dies 9 and 9' disposed on the large-diameter cylindrical portion 1a are also operated to crimp and clamp the electric wires inside the wire, and the connecting band 5 continuous to the outside thereof is operated. cut.

In the automatic wire splicing machine having such a structure and operation, the optical sensor 8 is connected to a detection operation state and a detection operation stop state (non-detection operation state) via a timer 10 that is interlocked with a connector feed amount detector 11 by the feed drum 6. Automatic switching control is possible depending on the operating state).

Specifically, as shown in FIG.
Of the peripheral wall of the small diameter cylindrical portion 1b of each insulating coated terminal 1 in A, the thick portion 1H in the light transmission direction on the upper side in the transport direction is thicker than twice the wall thickness t of the small diameter cylindrical portion 1b. 1h (bias shaded area in Figure 9) passes through the light transmission position of the sensor 8, the detection operation of the sensor 8 is stopped (OFF), and other than that, the detection operation state of the sensor 8 is turned off. In order to maintain (ON), the feed amount detected by the connected body feed amount detector 11 is set to be equal to the distance between the axes of the adjacent terminals 1, 1 in the connected body 1A, and the detection operation timing is set. is set slightly earlier than the timing at which the rotation of the feed drum 6 stops.

Figure 4 shows each component 6, 8, 3, 4, 9, 9',
11 and 10 are operation timing charts.

Note that the terminal 1 to be crimped is not limited to the three-stage closed-end terminal as shown in the above embodiment, but also the terminal 1 to be crimped.
It may be a two-stage closed-end terminal as shown in Figure 0.

Furthermore, the operation stop state (OFF) of the sensor 8 via the timer 10 may be set as shown by the dotted line in FIG. 4.

<Effects of the Invention> As is clear from the detailed description above, when using the method of the present invention, the sensor 8 is not constantly maintained in the detection operating state, but is At least while the thick portion 1h that is likely to cause malfunction of the sensor 8 moves past the light transmitting position, the detection operation is actively and intentionally stopped, so that the sensor detection signal can be received. It is possible to reliably avoid an unexpected crimping operation of the crimping dies 3 and 4 at an early timing.

Therefore, the original detection function of the sensor 8, such as detecting the insertion of the bare end of the wire into the sleeve 2, can be performed properly and reliably, and an economically advantageous continuous crimping operation can be performed with no or very little terminal loss. This led to this.

[Brief explanation of drawings]

Fig. 1 is a front view for explaining the crimping work state, Fig. 2 is a partially longitudinal side view of Fig. 1, Fig. 3 is a block diagram, Fig. 4 is an operation timing chart, and Figs. 5 to 7. is a partially cutaway perspective view showing the product to be crimped, an enlarged cross-sectional plan view of the main part, and a sectional view taken along the line in FIG. 6; FIG. 8 is a partially cutaway perspective view of the crimped product;
FIG. 9 is an enlarged longitudinal sectional front view of the part, and FIG. 10 is an enlarged longitudinal sectional side view of the main part showing another article to be crimped. 1 is a terminal with insulation coating, 1a is a large diameter cylinder part, 1b is a small diameter cylinder part, 2 is a sleeve, 3 and 4 are crimping dies,
5 is a connecting band, 6 is a feed drum, 8 is an optical sensor, 10 is a timer, 11 is a connector feed amount detector, and 1A is a terminal group connector.

Claims (1)

[Claims] 1 An insulating coated terminal 1 consisting of a large-diameter cylindrical part 1a that covers a coated part a of an electric wire A and a small-diameter cylindrical part 1b that fits and holds a highly conductive metal sleeve 2 into which the bare end b of the electric wire A is inserted. A large number of connected terminal groups 1A are arranged in parallel at predetermined intervals and connected between the large-diameter cylindrical portions 1a via the connecting band 5, while being sequentially transferred toward the crimping dies 3 and 4. The insertion of the bare terminal b of the electric wire A into the sleeve 2 of the insulated terminal 1 located at the position of the crimping dies 3 and 4 is detected by a transmission type optical sensor 8 acting near the tip of the small diameter cylindrical portion 1b. A method of crimping a terminal group connected body with an insulating coating, in which the crimping dies 3 and 4 are automatically crimped by detecting the crimping process, and the crimping process is performed a little earlier than when the rotation of the feed drum 6 for transporting the connected body 1A is stopped. Connected body feed amount detector 11 with detection operation timing set
By the timer 10 which is linked to
Of the circumferential wall of the small diameter cylindrical portion 1b of each insulated terminal 1 in A, the wall thickness t of the small diameter cylindrical portion 1b is at least at the thick wall portion 1H in the direction of light transmission by the sensor 8.
A method for crimping a terminal group connected body with an insulating coating, characterized in that the detection operation of the sensor 8 is stopped while the portion 1h, which is twice or more thicker than 1h, passes through a light transmitting position by the sensor 8.