JPH0480348B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic pressure welding machine for manufacturing a pressure welding type electric harness in which one or more pressure welding connectors are connected to a group of electric wires of a predetermined length at a predetermined interval, and in particular, The present invention relates to a continuity check device that checks (inspects) the electrical connection between each contact and each electric wire of a pressure-welding connector that is pressure-connected by the automatic pressure-welding machine.

A pressure welding connector has a pressure welding slot that is narrower than the diameter of the core wire of a covered electric wire to which a plurality of contacts received in parallel are received in an insulated housing with an open top, and that when an electric wire is inserted into the slot, the slot The edges on both sides break through the insulation coating of the wire and make electrical contact with the core wire, so it is possible to visually check the electrical connection state, that is, the continuity state, between each contact and each wire. This was considered difficult and, therefore, problematic in terms of reliability.

In addition, since a corresponding number of wires are connected to multiple contacts at the same time in one process, when manufacturing various types of pressure-welding electrical harnesses with different connection forms using an automatic pressure-welding machine, there are many pressure-welding connectors. If there are a large number of contacts at a pole, and for some unforeseen reason the corresponding number of wires are not supplied and pressure welding is performed, there is a problem that the wires will not be connected to some of the contacts. It was hot.

The purpose of the present invention is to solve these problems,
It is an object of the present invention to provide a continuity check device that can reliably check the electrical connection between each contact of a pressure contact and each wire of a corresponding wire group at the same time as the pressure contact connection.

That is, the present invention provides a pressure welding device having a pressure welding punch and a pressure welding die that are arranged vertically opposite to each other across an electric wire transfer path, a pressure welding connector supply device to the pressure welding die, and a group of electric wires corresponding to the pressure welding connector to the pressure welding device. and an electric wire feeding device that intermittently feeds a group of electric wires of predetermined lengths to the pressure welding device, each of the pressure welding teeth of the pressure welding punch is insulated. a continuity check piece attached via a member; a continuity check circuit that connects the continuity check piece and the end of the wire wrapped around the wire supply reel; and a conduction piece integrally provided, and at the same time when the electric wire is press-connected to the contact, the continuity check piece contacts the conduction piece to close the continuity check circuit, and the electric wire is press-connected. The present invention relates to a continuity check device configured to open the continuity check circuit when the pressure welding punch is later separated from the contact.

Further, the second aspect of the present invention is to insulate the ends of each electric wire constituting the continuous body of the pressure welding type electric harness which is connected by pressure welding and then wound around the winding device, and each pressure welding tooth of the pressure welding punch. It is characterized in that a continuity check circuit is constructed between the continuity check piece and the continuity check piece attached via a member.

Therefore, according to the present invention, it is possible to reliably check whether the electrical connection between each contact of the pressure welding connector and each wire of a predetermined wire group corresponding thereto is good or defective at the same time as the pressure welding connection. A press-contact type electrical harness is obtained. In particular, since the continuity check piece attached to each pressure welding tooth of the pressure welding punch is brought into contact with the continuity piece integrally provided near the pressure welding connection part of each contact, the probe can be inserted into the fitting connection part of the contact. Compared to the case of inserting and making conductive contact, there is no risk of damaging the fitting connection portion, and quality can be stabilized. Furthermore, since a configuration is adopted in which a continuity check piece is attached to each pressure contact tooth of a pressure contact punch, which is common to all automatic pressure contact machines, there is an advantage that it can be easily applied to all types of machines.

Since continuity is checked at the same time as the pressure welding connection, there is no need for a separate process for continuity checking.
This increases work efficiency and increases the versatility of work in the next process.

Furthermore, according to the second aspect of the present invention, each wire of the wire group constituting the continuum of the pressure-connected electrical harness obtained by pressure-connecting is used for the continuity check circuit, so that the wires are free from unexpected damage. The continuous body can be wound around a winding device while checking for electrical connection defects in the case of disconnection for some reason, and a highly reliable continuous body of pressure welding type electric harness can be obtained.

Embodiments of the present invention will be described below based on the drawings. FIGS. 1 and 2 schematically show an automatic pressure welding machine for manufacturing a continuous body of a pressure welded electrical harness.
The automatic pressure welding machine includes a pressure welding device 11 that pressure-connects a pressure welding connector 3 to a predetermined wire group 2A supplied along a wire transfer path W extending substantially horizontally, and a pressure welding device 11 that supplies a predetermined pressure welding connector 3 to the pressure welding device 11. selects the predetermined wire group 2A to be connected to the pressure welding connector 3 from among the wire groups 2 continuously fed out from the connector sorting and feeding device 12 (see FIG. 2) and a large number of wire supply reels 4... A wire sorting and feeding device 13 that can feed the wires to the pressure welding device 11, and a wire group 2A connected to the pressure welding connector 3 in the pressure welding device 11 are clamped and the wires are moved along the wire transfer path W for a predetermined length together with the pressure welding connector 3. A large number of pressure welding connectors 3 are connected at predetermined intervals to a long continuous wire group 2A transferred by the wire length measurement and transfer device 14. The present invention includes a winding device 15 that sequentially winds up the continuous body 7 of the press-contact type electrical harness. Note that the continuous body 7 may be collected and stored in the tray 16 without being wound around the winding device 15 . Furthermore, as shown by the imaginary line in FIG. 2, the continuous body 7 wound by the winding device 15 is fed to the binding device 8 and the marking device 9, and the wire group 2A is bundled at an appropriate position. After printing an appropriate symbol or product number on the binding tape, it may be used again by winding it around the winding device 15'.

Next, each of the above device parts will be explained.

Pressure Welding Device As shown in FIGS. 1 and 3, the pressure welding device 11 includes a pressure welding punch 21 and a pressure welding die 22 that are vertically disposed opposite to each other with the wire transfer path W interposed therebetween.

The pressure punch 21 is mounted on a slider 24 that is raised and lowered by an air cylinder 23, and is lowered from the raised position shown in FIG. 3 to the pressure preparation position shown in FIG. 4 and the pressure contact position shown in FIG. Slider 2
4, a wire cutting blade 26 that is moved up and down by an air cylinder 25 assembled to the slider 24;
is installed. The cutting blade 26 operates as shown by imaginary lines in the pressure welding preparation position shown in FIG. 4 at the start of the welding operation and at the end of the welding operation, and cuts the end portion of the wire group 2 or 2A.

The pressure welding die 22 is attached to a second slider 30 that is moved up and down by a second air cylinder 29 assembled to a first slider 28 that is moved up and down by a first air cylinder 27. First, the first air cylinder 27 is activated and the pressure welding die is 22 to the first slider 2
8 and is raised from the lowered position shown in FIG. 3 to the pressure welding preparation position shown in FIG. 4, and then the second air cylinder 29 is activated to raise it to the pressure welding position shown in FIG. 5.

The pressure welding die 22 consists of a fixed die block 22a fixed to the second slider 30, and a movable die block 22b located opposite to the block 22a and attached so as to be tiltable laterally outward using a pivot pin 31 as a fulcrum. ing. The movable die block 2
2b is actuated by an air cylinder 32 assembled to the second slider 30, as shown in FIGS. 1 and 3. The air cylinder 32 is constantly movable by the pressure of an internal spring 33.
2b is biased to the closed position shown by the solid line in FIG. 3, and the pressure contact connector 3 inserted between both blocks 22a and 22b and supplied to a predetermined position is pressed against the movable die block 22a side and clamped and fixed. The movable die block 22b
The structure is such that air pressure is used only when the valve is moved to the open position shown by the imaginary line in FIG.

Connector sorting and feeding device As shown in Figure 2, the connector sorting and feeding device 1
2 is a chute provided with two parts feeders 41 and 42 that feed the pressure welding connectors 3 in a fixed posture, and a plurality of guide grooves 44 that distinguish and feed several types of pressure welding connectors 3 with different numbers of poles. 43, a transfer chute 45 for transferring the pressure welding connector 3 from the parts feeder 41 or 42 to the guide groove 44 of either of the chute 43, and the pressure welding connector 3 fed out from the lower end of the guide groove 44 of the chute 43 in one pressure welding process. One or several pressure connectors 3 to be pressure-connected to the wire group 2A are separated and connected to the pressure-welding device 11.
and a distribution chute 46 for supplying the pressure welding die 22 to a predetermined position.

In the parts feeders 41 and 42, the mounting base 47 for fixing them is movable laterally, and when the pressure contact connector 3 is being fed from one of the parts feeders 41 through the transfer chute 45 to a predetermined guide groove 44 of the chute 43. In the other parts feeder 42, the pressure welding connector 3 to be used for the next pressure welding operation is stored and prepared, and the mounting base 47 is moved laterally to transfer the outlet of the parts feeder 42 to the transfer chute 4.
5, the next press-connecting connector 3 can be immediately fed.

The chute 43 is configured to be able to move laterally, and the chute 43 is stopped at a position where the upper end of a desired guide groove 44 faces the transfer chute 45 and the lower end of the guide groove 44 faces the distribution chute 46, and in this state, the parts feeder 41 or 42, the pressure welding connector 3 is transferred from the transfer chute 45 to the guide groove 4.
4 to a distribution chute 46. Pressure-connecting connectors 3 having different numbers of poles are housed in advance in each guide groove 44, and the guide groove 44 is selected by detecting the number of poles of the connectors to be press-connected using a phototube or other sensor.

Wire Sorting and Feeding Device As shown in FIGS. 1 and 2, the wire sorting and feeding device 13 continuously feeds out wires from a large number of wire supply reels 4 and supplies them via a wire concentrator 5 and a strainer 6. a chuck 91 that guides and feeds the wire group 2 along the wire transfer path W and clamps and fixes the wire group 2;
A predetermined wire group 2A to be supplied to the pressure welding device 11 and connected to the pressure welding connector 3 is released, and a selection chuck 92 that clamps and fixes the remaining wire groups is placed close to the pressure welding position of the pressure welding device 11, A wire guide 93 is provided for guiding the wire group 2 along the wire transfer path W to a pressure contact position.

In the chuck 91, the sorting chuck 92, and the wire guide 93, guide grooves 94, 95, and 96, the number of which corresponds to the number of wires constituting the wire group 2, respectively extend along the wire transfer path W. They are arranged at regular intervals in the lateral direction (this interval is set equal to the interval between the insulation displacement slots of the contacts 34 housed in the insulation displacement connector 3), and each electric wire of the electric wire group 2 is individually separated. Pressure welding device 11 through guide grooves 94, 95 and 96 corresponding to
supplied to

The chuck 91 and the wire guide 93 are connected by two connecting rods 97, and both are connected by an air cylinder 98.
It is configured such that it can be moved slightly in the direction of the wire transfer path W by the wire transfer path W. Also, sorting check 9
2 is configured so that it can be moved slightly in the direction of the wire transfer path W by an air cylinder 99 attached to the chuck 91. Therefore, the selection chuck 92 is also connected to the chuck 91 by the air cylinder 98.
It is moved in the direction of the wire transfer path W together with the electric wire transfer path W.

The chuck 91 has a holding plate 100 that pushes out and fixes the entire wire group 2 guided and fed through the guide groove 94, and the holding plate 100 is attached to the air cylinder 1.
01 causes it to move up and down.

As shown in FIG. 1, the sorting chuck 92 has a number of sorting blades 102 corresponding to the number of guide grooves 95.
and a grooved drum 10 for actuating the blade 102.
3. The sorting blade 102 is formed in an L-shape, and is provided with a wire holding claw 104 at one end and an engaging protrusion 105 at the other end. Each sorting blade 102 is attached so as to be able to swing independently by pivoting its angle to a support shaft 106 horizontally suspended on the chuck body, and the engagement protrusion 105 is attached to the outer peripheral surface of the grooved drum 103 by a push spring 107. The wire holding claw 1 is automatically biased against the
04 so as to protrude into the guide groove 95. When the engaging protrusion 105 engages a cam groove (not shown) provided on the outer peripheral surface of the grooved drum 103, the wire holding pawl 104 protrudes into the guide groove 95, and the wire is guided and fed through the guide groove 95. Press the wire to stop feeding. Therefore, among the wire groups 2 guided and fed through all the guide grooves 95, the remaining wires excluding the predetermined wire group 2A to be supplied to the pressure welding device 11 are removed by the holding claw 104 of the sorting blade 102.
When pressed, only the predetermined group of wires 2A can be fed, and as will be described later, the selection chuck 91 and the movable chuck 1 of the wire length measuring and transferring device 14
15 cooperates with each other to supply only the predetermined wire group 2A to the pressure welding device 11.

Since the predetermined wire group 2A supplied to the pressure welding device 11 is related to the number of poles and the number of the pressure welding connectors 3 to be connected, the cam grooves are provided on the outer peripheral surface of the grooved drum 103 with different phases, and the wires are connected. It is configured to be rotated and displaced in correspondence with the pressure welding connector 3, so that the engagement protrusions 105 of a predetermined sorting blade 102 are respectively engaged with the cam grooves.

Wire Length Measuring and Transfer Device As shown in FIGS. 1 and 2, the wire length measurement and transfer device 14 has a movable chuck 115 that moves back and forth along the wire transfer path W. It is configured to hold 2A.

The movable chuck 115 is attached via an arm 116 to a chain 119 suspended between a driving wheel 117 and a driven wheel 118, and is connected to the DC motor 1.
By rotating the drive wheel 117 in the forward and reverse directions at 20, the movable chuck 115 can be moved back and forth along the wire transfer path W via the chain 119 and stopped at any position.
The length of the wire group 2A to be transferred is measured by setting the amount of movement and the number of reciprocations. 121 in the diagram
is an auxiliary chuck that opens and closes in place.

Next, during the pressure welding connection by the automatic pressure welding machine having the above configuration, a continuity test is performed to check whether each of the electric wires 2A ₁ to 2An of the wire group 2A and each contact 34 of the pressure welding connector 3 are reliably electrically connected. The check device will be explained.

As shown in FIGS. 6 to 9, the continuity check device includes an insulating material on the side surface of each pressure contact tooth 21a of the pressure contact punch 21 that is inserted between two opposing pressure contact pieces 35 and 36 of the contact 34. Member 50
The continuity check piece 51 is attached via a ground connection 52 to the ends of the electric wires 2A ₁ to 2An wound around the electric wire supply reel 4.
and a continuity check circuit 54 connected via a slip ring 53, and a continuity detector 55 and a power source 56 arranged in series with the continuity check circuit 54. A lamp, a buzzer, etc. are used as the continuity detector 55. On the other hand, a conductive piece 36 is integrally formed on one side of the pressure contact piece 35 of each contact 34 of the pressure contact connector 3 .

Then, the pressure welding punch 21 and the pressure welding die ₂₂ of the pressure welding device 11 operate to the pressure welding position shown in FIG.
When the seventh contact 3a is connected to each contact 3a, the seventh
As best shown in FIG. 8 and FIG.
configured to make contact with.

Therefore, in the pressure welding process, each electric wire 2A ₁ to 2
When An is securely electrically connected to each contact 34, as shown in FIG.
The continuity check circuit 54 becomes a closed circuit through the electric wires 2A ₁ to 2An connected to the terminal 4 and the slip ring 53, and as a result, the continuity detector 55 operates to indicate that the pressure contact connection is good. Note that if the pressure welding connection is defective or if a predetermined number of wires are not being supplied, the continuity detector 55 at that location will not operate, so the operation of the entire machine must be stopped in response to this. For example, it is possible to quickly and reliably check whether the pressure welding connection is good or bad, and a highly reliable pressure welding type electrical harness can be obtained.

The continuity check device described above is not only an automatic pressure welding machine that manufactures a continuous body of the pressure welding type electric harness shown in the embodiment, but also a one-end automatic pressure welding machine that connects a pressure welding connector 3 to one end of a group of electric wires of a predetermined length, It can be applied to various automatic pressure welding machines, such as a double-end automatic pressure welding machine that connects pressure welding connectors 3 to both ends of a group of electric wires of a predetermined length.

FIG. 10 shows a second embodiment of the present invention, in which a continuity check circuit 54 connects each electric wire 2A 1 to _2An of the press-fit type electric harness continuum 7 wound around the winding device 15. The end portion and the continuity check piece 51 are connected to a ground connection 52 and a slip ring 5.
It is characterized in that it is configured by connecting via 3.

With such a configuration, at the same time as the continuity check at the time of pressure welding connection, when some or all of the electric wires 2A ₁ to 2An constituting the continuous body 7 wound around the winding device 15 are cut due to unexpected reasons, etc. Since it is also possible to check for electrical connection failures in the electrical connection, it is possible to obtain an even more reliable press-fit type electrical harness continuum 7.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention, and FIG. 1 is a schematic front view of an automatic pressure welding machine equipped with a continuity check device according to the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a schematic front view of the same pressure welding machine. 4 and 5 are enlarged longitudinal sectional front views showing the operating state of the main parts, Fig. 6 is a schematic explanatory diagram of the continuity check device, and Fig. 7 is the main parts. 8 is a sectional view taken along the line 8-8 of FIG. 7, FIG. 9 is a perspective view of the contact, and FIG. 10 is a schematic explanation of the continuity check device according to the second invention. It is a diagram. 2...Electric wire group, 2A...Predetermined electric wire group, 3...
Pressure welding connector, 4... Electric wire supply reel, 7... Continuum of pressure welding type electrical harness, 11... Pressure welding device,
12...Connector sorting and feeding device, 13...Wire sorting and feeding device, 14...Wire length measuring and transferring device, 15...
... Winding device, 21 ... Pressure welding punch, 22 ... Pressure welding die, 34 ... Contact, 35 ... Pressure welding piece,
36... Continuity piece, 50... Insulating member, 51... Continuity check piece, 53... Slip ring, 54...
... Continuity check circuit, 55 ... Continuity detector, 56
……power supply.

Claims (1)

[Scope of Claims] 1. A pressure welding device having a pressure welding punch and a pressure welding die that are arranged vertically opposite to each other across an electric wire transfer path, a connector supply device that supplies a pressure welding connector to the pressure welding die, and an electric wire corresponding to the pressure welding connector. An automatic pressure welding machine equipped with a wire feeding device that intermittently feeds a wire group to the pressure welding device by a predetermined length, a continuity check piece attached to each pressure welding tooth of the pressure welding punch via an insulating member; A continuity check circuit that connects the continuity check piece and an end of the wire wound on the wire supply reel, and a continuity piece integrally provided near the pressure connection portion of each contact of the pressure contact connector. At the same time as the electric wire is press-connected to the contact, the continuity check piece contacts the conduction piece to close the continuity check circuit, and after the electric wire is press-connected, the press-contact punch is separated from the contact, A continuity check device configured to open the continuity check circuit. 2. A pressure welding device having a pressure welding punch and a pressure welding die that are arranged vertically opposite to each other across a wire transfer path, a connector supply device that supplies a pressure welding connector to the pressure welding die, and a group of electric wires corresponding to the pressure welding connector to the pressure welding device. In an automatic pressure welding machine equipped with a wire feeding device that intermittently feeds wires of a predetermined length, a continuous electrical harness is obtained by connecting a large number of pressure welding connectors at predetermined intervals to a long continuous group of wires using the pressure welding device. a winding device for winding the body, a continuity check piece attached to each pressure contact tooth of the pressure contact punch via an insulating member, and a continuity between the continuity check piece and the electrical harness wound around the winding device. a continuity check circuit that connects each electric wire end of the body, and a continuity piece that is integrally provided near the insulation displacement connection part of each contact of the insulation displacement connector, and the electric wire is press-connected to the contact. At the same time, the continuity check piece contacts the continuity piece to close the continuity check circuit, and after the electric wire is connected by pressure welding, the pressure welding punch is separated from the contact to open the continuity check circuit. Continuity check device.