JPS6096117A - Coating seaprating detector of wire in terminal press-bonding device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for cutting electric wires, which is performed by sequentially moving the electric wire through the steps as a series of assembly operations, including cutting of the insulated electric wire, stripping off the sheath, detecting the stripping, and crimping the terminal. The present invention relates to a sheath stripping detection device for detecting a sheath stripping state in a sheath stripping and terminal crimping device.

An example of a conventional coating stripping detection device used in the above-mentioned electric wire cutting, coating stripping, and crimping device (hereinafter referred to as a terminal crimping device) is shown in FIG. That is, the wire W is coated by passing between a pair of contacts such as leaf springs S, S, etc., which are parallel to the wire conveying direction and facing each other at an interval slightly larger than the conductor diameter of the wire. Stripping is detected by utilizing the fact that when the stripped conductor w1 passes, a circuit between the side contactors is closed.

However, such conventional known techniques have the following drawbacks and problems.

(b) It detects only the presence or absence of the coating, and cannot detect the distance between the tip and the rear end of the exposed conductor after the coating has been stripped away, which is an important quality characteristic of stripping the coating.

(b) Since the wire passes between narrow contacts, the tip of the wire is bent, which adversely affects the quality of the product when crimping the terminal.

The present invention focuses on the above-mentioned shortcomings of the prior art, and detects the completion of sheathing stripping by simultaneously detecting the position of the tip of the conductor, the length of stripping, etc. during sheathing stripping, without moving the wire when detecting sheathing stripping. It is intended to.

The configuration of the present invention to achieve the above object will be described below with reference to the drawings.

FIG. 2 shows a planar configuration of a typical terminal crimping device A, which includes a main body 1, a wire feeding section 2, a wire cutting section 3, a conveying section 4, a wire gripping device 5, a sheath stripping section 6, a stripping detection section 7, and a terminal. It is composed of a crimping part 8. Note that W is an electric wire.

3 to 6 are diagrams of the peeling detection section, and FIG. 3 shows a side view of the peeling detector, in which the detector B is attached to the vertical sliding plate B' and is mounted by a cylinder (not shown). It moves up and down along the guide surface of frame Bn.

FIG. 4 shows a partial detailed sectional view of the wire contact portion of the detector B shown in FIG. Guide groove 1
1' so as to be able to move toward and away from the wire at right angles to the axial direction of the wire W. The electric wire W is supported by the electric wire receiver 12, and the electric wire receiver 12 is formed with a stepped portion 12a that matches the thickness of the coating of the electric wire.

FIG. 5 shows a cross-sectional view taken along the line V-V in FIG. Insertion is guided through. The guide tube 14 is supported by a tube support plate 16, the board 13 is connected to a connector 17, and the lead wire 1
8 is connected to a judgment display (not shown) (see Figure 3)
.

Next, the operation of coating peeling detection will be explained.

In FIG. 2, the covered electric wire W is fed a predetermined length by the feeding mechanism 2 and cut at the cutting section 3, and the electric wire W gripped by the gripper 5 is transferred to the covering stripping section 6 by the conveying mechanism 4.
, the stripping detection section 7 and the terminal crimping section 8 .

When the electric wire W cut to a fixed size and partially stripped of its sheathing is conveyed to the detection unit 7, the detector B is at the top dead center position of the guide plate B' (the state shown in Fig. 3 is the bottom dead center position). position), and when the movement of the wire is completed, the detector B operates in the direction of arrow P, and the contactor 10 and the wire holder 12 lower the wire to the bottom dead center position where the conductor W1 and sheathing W2 are sandwiched. , contactor 10 and electric wire W
After contacting, the contactor 10 is pressed and biased by the coil spring 15, and the contactor 10 maintains contact with the electric wire W.

In FIG. 4, the contacts 10b to 10e of 1&lS that are in contact with the wire conductor W1 at the wire end are electrically connected to the wire receiver 12, and the circuit between the contacts 10b to 10e and the wire receiver 12 is connected to the wire receiver 12. Gold 12, wire conductor W], contacts 10b to io
e, the upper projection 10', the coil spring 15, the guide tube 14, the board 13, the connector 17, the lead wire 1B, which is closed via the judgment indicator, and displays a conduction signal on the judgment indicator (for example, lighting a lamp), and the electric wire. Each contact may be made a conductive surface via the conductor W1 to obtain a conductive signal.

The contacts 10f to 10j that are in contact with the covering W2 of the electric wire W are not electrically connected. Further, since there is no contact with the contacts 10a, conduction cannot be obtained, and the conduction signals corresponding to these contacts are not displayed on the determination display.

In the example shown in FIG. 4, the tip position of the wire conductor W1 is located between the contacts 10a and 10b, the rear end position is located between the contacts 10e and 1Of, and the stripping length of the sheath is It can be detected as being equivalent to the length of the wire conductor, and when the wire W is crimped to the crimp terminal C in the terminal crimping process shown in FIG. It is judged as "good" that falls within the range of .

FIG. 8 shows a contact 19 of a different configuration, and the contacts 10 shown in FIGS. 4 to 6 are arranged with some distance (1 mm) apart by the guide rill'. In the one shown in Fig. 8, the groove is eliminated and the surface of each contact 19 is coated with an insulating coating or an insulating film 19', and the surfaces of the contacts 19a, 19b, 19C, . . . are aligned between the guide side plates in contact with each other. Compared to a contact with a guide groove, it is possible to detect the extent of peeling off the coating more accurately.

As explained above, conventional coating stripping detection only detects the presence or absence of coating, whereas the present invention can detect the tip and rear end positions of the wire conductor, and the tip of the conductor during the terminal crimping process. , it is possible to detect whether or not the rear end is within the allowable range, and the electric wire is not moved at the time of detection, so the tip part does not bend and the terminal can be crimped securely.

[Brief explanation of the drawing]

Figures 1 (a) and (b) are a plan view and a side view of an example of a conventional sheath stripping detection device for a crimping device, and Figure 2 is a general configuration of a wire cutting, sheath stripping, stripping detection, and terminal crimping device. FIG. 3 is a side view of an embodiment of the coating stripping detection device according to the present invention, FIG. 4 is a sectional view of the wire contact portion of the detector in FIG. 3, and FIG. -V line sectional view, Fig. 6 is a VT-Vl sectional view in Fig. 5, Fig. 7 is a side view of the connection state of the terminal and electric wire, and Fig. 8 is a perspective view showing another embodiment of the contact. It is. A...Terminal crimping device, B...Detector, C...Terminal, 10...Contactor, 12...Wire holder, 15...
coil spring. Figure 5 Figure 8 Figure 90

Claims (1)

[Claims] A detector having a plurality of contacts that are mutually insulated and movably arranged in parallel is provided so as to be movable toward and away from the wire receiver, and each contact is biased in the direction of the wire receiver. 1. A wire sheath stripping detection device in a terminal crimping device, characterized in that a coil spring is provided and each contact is connected to a detection circuit.