JP2002124147A - Crimp connection of flat cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To crimp connect a flat cable in proper posture. SOLUTION: A positioned crimp terminal 40 is pressed by a press mold 20 with a pressing surface 21 of which is bigger than the width of a flat cable 30. A relief hole of the terminal 40, a core wire guiding groove, and a guiding slope centering the flat cable 30 are formed on the pressing surface 21 of the mold 20. A bolt 14 mounted on a positioning plate 11 of the flat cable 30 is pressed by the mold 20 to make the flat cable 30 synchronously come down with the mold 20 without pulling, and crimp in horizontal state. After crimping, in order to maintain the height of the flat cable 30 as it is, a concave part 9a of a notch plate 9 mounted on the lower end of a slide axis 6 of a receiving plate 8 of the flat cable, and a plunger 1a at the side surface of a block 1, are made to engage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for pressing a flat cable having a bridge formed of an insulating resin between core wires to press-connect terminals so as to maintain the pitch of the core wires at a predetermined value.

[0002]

2. Description of the Related Art A dome lamp for a roof of an automobile includes a flat cable 30 having a core wire 31 formed by a stranded wire as schematically shown in FIG. A structure having a structure pressed into contact with 40 is mounted.

The pressure contact terminal 40 has a pair of pressure contact blades 42 erected at the end of a band-shaped bus bar 41 with their slot surfaces facing each other in the width direction of the bus bar 41. It is fitted into a positioning groove 51 provided on the surface of the base plate 50, fixed by a pressing plate 52, and mounted on the base plate 50.

[0004] In the flat cable 30, each core wire 31 is press-fitted in a one-to-one correspondence with a slot 43 of a pair of press contact blades 42 of each press contact terminal 40. In the figure, the flat cable 30 of the three core wires 31 is a base plate. Three crimp terminals 4 on 50
Connected to 0.

[0005]

When the above-described connection body of the flat cable 30 and the press contact terminal 40 is manufactured, the connection between the flat cable 30 and the press contact terminal 40 is performed as follows.
Currently, it is performed manually.

[0006] As shown in the above-mentioned figure, the flat cable 30 has a plurality of core wires 31 arranged in parallel, and two resin films 32 are insulated and coated in a laminated film shape (otherwise, a resin is extruded). In the case where the wire is pressed against the terminal 40, unlike the case where an independent electric wire is pressed, the pressed state of the core wire 31 at any of a plurality of pressed positions on the cable surface. In the case of a defect, for example, if the pressure contact depth is insufficient or if the axis of the core wire 31 and the center of the slot 43 are misaligned, the misalignment is caused by the resin portion 33 (bridge portion) between the core wires 31. 33) acts on other parts via the flat cable 30.
Causes the flat cable 30 to be distorted (generation of internal stress). Such a distortion causes a crack in the bridge portion 33, and the core wire 31 may be exposed from the cracked portion, thereby causing a short circuit or a short circuit. In addition, there is also a problem that the work performed by humans causes variations in work results.

Accordingly, an object of the present invention is to provide a flat cable in which the core wire is formed of a single core or a stranded wire, wherein each core wire is located at a regular press contact depth, An object of the present invention is to allow the terminal to be pressed against the terminal in a correct posture having a normal tension without deviation from the center of the slot.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a method of positioning a press contact terminal and connecting a flat cable positioned above the press contact terminal to a flat cable having a width larger than the width of the flat cable. Each core wire is pressed against the corresponding pressure contact terminal by pressing with a pressing surface, and as a device for positioning and positioning the pressure contact terminal.
Fixing means, positioning and fixing means for the flat cable, a pressing mold having the pressing surface, and an elevating mechanism for raising and lowering the pressing mold, each pressing terminal of the pressing surface of the pressing mold The structure has a terminal escape hole at a position corresponding to.

With this configuration, the entire surface of the flat cable in the area including the full pressure contact terminals is simultaneously pressed by the pressing surface of the mold, so that the flat cable of the pressed portion has a horizontal cable surface. The core wire is held and pressed against the terminal in a posture where the core wire is straight in a horizontal plane.

At this time, a guide groove into which the core wire can be inserted can be provided at a position corresponding to each core wire of the flat cable on the pressing surface of the press-connecting die. In this case, the core wire is guided by the guide groove, the posture becomes straight, and the core wire is accurately guided into the slot.

[0011] Further, a guide gradient for centering the flat cable can be provided on the pressing surface of the press-contacting mold, so that the core can be easily guided to the guide groove by the guide gradient. The accuracy with which the center of the axis is guided to the center of the slot is further improved.

The degree of "fixing" of the flat cable in the pressing method according to any one of claims 1 to 4 or the flat cable positioning / fixing means in the apparatus is described in claim 5 and in claim 6. Is different from the degree of "fixation" in that device.

That is, the "fixation" in the former case is such that when the positioned flat cable is pressed by a mold and pulled, the posture (particularly the posture in the width direction of the cable) does not shift. "Fixed to".

On the other hand, in the pressure welding method and the apparatus according to the fifth and sixth aspects, the positioning and positioning of the flat cable therein are performed.
The degree (strength) of “fixation” in the fixing means is not limited as in the former. The meaning of this will be described below.

In the method according to a fifth aspect of the present invention, the flat cable positioning / fixing means can be moved up and down by using the apparatus according to the sixth aspect of the present invention, and the pressing surface of the pressing mold is flat. It is lowered at the same time when it comes into contact with the cable, and thereafter, it is lowered in synchronization with the die until it reaches the bottom dead center.

[0016] In this case, since the mold only sandwiches the flat cable between the flat cable positioning and fixing means and keeps the cable surface horizontal and does not pull the flat cable, the flat cable can be used. Has no tensile action at the time of pressing and no generation of residual stress due to relaxation after pressing.

As described above, this claim 6
The fixing of the flat cable in the case of the device according to the invention of
Since there is no need to consider the pulling action of the mold, the degree of “fixation” of the flat cable positioning / fixing means (as in the case of the pressure welding method according to claims 1 to 4 and the corresponding device) ( Strength) is not limited,
It is possible to increase the fixing strength as compared with them and to fix it securely.

The mechanism for lowering the positioning and fixing means of the flat cable can be provided separately from the mold. However, if the mechanism is pressed down by the mold and lowered, the apparatus becomes compact and synchronization is achieved. Also becomes easier.

In the above configuration, a lock mechanism for maintaining the flat cable positioning / fixing means at the height immediately after the pressure contact (pressure contact height) after the pressure contact is completed may be provided.

With this arrangement, even if the mold is raised after the completion of the pressure welding, the flat cable remains at the position of the bottom dead center of the receiving stand. When the fixing is released, the connection body between the flat cable and the pressure contact terminal can be taken out immediately.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. The target work of the apparatus of this embodiment is a press contact terminal 40 of the above-described conventional example having the form shown in FIG.
And a flat cable 30 of three core wires 31 pressed against it. The base plate 50 of the press contact terminal 40 is provided with a positioning hole 53 at a predetermined pair of positions for positioning on the receiving base 3a of the apparatus described below.

The press-contact device of this embodiment shown in FIGS. 1 to 5 includes a press-contact terminal 40 of a target work and a flat cable 3.
A component for positioning and fixing 0 is mounted on a longitudinal pallet P, and a press-contacting die that is mounted above and below the elevating mechanism 100 shown in FIGS. 20 are provided. First, a configuration for positioning and fixing a work will be described.

A rectangular block 1 is fixed to the center of the pallet P in the longitudinal direction.
The base plate 2 on which the positioning and fixing means for the flat cable 30 and the flat cable 30 are mounted is fixed. Base plate 2
A base block 3 for positioning and fixing the press contact terminals 40 is disposed at the center of the upper surface of the pallet P in the longitudinal direction of the pallet P so as to cross the longitudinal direction.

The base block 3 has its center in the longitudinal direction higher than both sides, and that portion serves as a receiving base 3a for the terminal 40. The lower part 3 on both sides of the cradle 3a
A toggle clamp 4 for fixing the terminal 40 is disposed in each of the b. Two pairs of pilot pins 5 are buried at predetermined positions on the surface of the receiving base 3a, and the base plate 50 of the press contact terminal 40 is provided at a portion where the upper end 5a protrudes from the surface of the receiving base 3a. The press contact terminal 40 is positioned by aligning the positioning holes 53. Positioning and fixing means for the flat cable 30 are provided on both sides of the base block 3 for positioning and fixing the press contact terminals 40 as described above. Next, this flat cable 3
The positioning / fixing means 0 will be described.

Two slide shafts 6 are inserted into portions 2a of the base plate 2 protruding on both sides of the base block 3 in the width direction of the pallet P. One of the slide shafts 6 is rotatably supported by an upper guide cylinder 7a and a lower collar 7b which are coaxially arranged with a portion 2a of the base plate 2 protruding from the base block 3 interposed therebetween. The other one is the upper guide cylinder 7a
, The receiving plate 8 of the flat cable 30 is attached to the upper end, and the notch plate 9 is attached to the lower end. A compression spring 10 is provided between the lower surface of the receiving plate 8 of the flat cable 30 of the slide shaft 6 and the base plate 2a.
Is inserted and constantly urges the receiving plate 8 upward, and the receiving plate 8 is guided by the slide shaft 6 and is slidable up and down.

The receiving plate 8 is pushed down by the mold 20 as described later and descends. When the receiving plate 8 reaches the bottom dead center, a lock mechanism is provided for retaining the receiving plate in that state. The lock mechanism includes a concave portion 9 a provided in a notch plate 9 at the lower end of the slide shaft 6 and a ball plunger 1 a provided in the block 1.

The concave portion 9a of the notch plate 9 is provided on the side surface on the side facing the block 1, and the concave portion 9a
The ball plunger 1a that engages with the a is provided on the side surface of the block 1 at a position facing the recess 9a when the notch plate 9 reaches the bottom dead center. The detailed operation of the lock mechanism by the engagement between the ball plunger 1a and the concave portion 9a of the notch plate 9 will be described later.

The flat cable 30 is partially positioned in the groove 11a of the positioning plate 11 provided on the upper surface of the receiving plate 8 as described above, and the remaining portion is provided on the same upper surface of the receiving plate 8. Is placed on the urethane rubber plate 12. Further, the toggle clamp 1 is provided on the receiving plate 8.
A portion 3 of the flat cable 30 positioned on the urethane rubber plate 12 is pressed and fixed therewith. When the flat cable 30 is positioned in the groove 11a of the positioning plate 11, as shown in FIG. 3 and FIG. It is set so as to overlap the center line of the slot 43 of the 40 pressure contact blades 42.

On both sides of the groove 11a of the positioning plate 11, bolts 14 for projecting when the receiving plate 8 is pressed by a pressing mold 20 described below are projected. The bolt 14 has a cushioning urethane rubber 14a at its upper end.
The lower part is screwed into the positioning plate 11 so that the amount of projection of the positioning plate 11 from the surface can be adjusted. The above is the flat cable 30
This is the configuration of the positioning / fixing means. Next, the flat cable 30 fixed by the positioning / fixing means is used.
The configuration of the press-contact mold 20 for pressing the press-contact to the press-contact terminal 40 will be described.

The pressing mold 20 is formed by quenching a rectangular parallelepiped steel material, and has a lower surface serving as a pressing surface 21 of a flat cable 30. The shape is engraved. The mold 20 is disposed directly above the receiving base 3a of the press contact terminal 40, and only a part of the mold 20 is held by the mold holder 25 attached to the intermediate member 101 at the lower end of the elevating mechanism 100 shown in the figure. FIG. 6 shows the mold 20, the flat cable 30 positioned below the mold 20, and the press-connecting terminal 40.

As shown in FIG. 6A, a relief hole 22 larger than the horizontal cross section of the pressing blade 42 is provided at a position corresponding to each pressing blade 42 on the pressing surface 21 of the pressing die 20. Through the lower surface. This relief hole 2
Numeral 2 has a width much larger than the thickness dimension of the press contact blade 42 and plays a role of a relief hole itself, but a dimension slightly larger than the width in the width direction of the press contact blade 42. In this direction, the mold 20 descends, and serves to guide the press-contact blade 42 upright while the hole 22 passes through the press-contact blade 42.

As shown in FIG. 3B, a guide groove 23 having an arc slightly larger than the outer diameter of the resin surrounding the core wire 31 is formed in a portion corresponding to each core 31 of the flat cable 30 in the width direction of the mold 20. Are formed at the same pitch as the pitch of the core wires 31, and when the mold 20 presses the flat cable 30, the respective guide grooves 23 correspond to the respective core wires 3.
1 and cover each core 31 with the corresponding press-connecting blade 42.
To the slot 43.

Further, as shown in (b), the pressing surface 21 is provided with a left-right symmetric inclined surface 24 having the center guide groove 23 as a center of symmetry so as to include the three guide grooves 23. It is provided to penetrate along the longitudinal direction of the mold 20 (the direction perpendicular to the plane of the drawing). When the mold 20 presses the flat cable 30, the inclined surface 24 guides both edges of the flat cable 30 to center the flat cable 30, and the core 31 of the flat cable 30 is easily fitted into the corresponding guide groove 23. It is a guide gradient to make it. The configuration of the mold 20 has been described above, and the configuration of the apparatus up to this point has been described together with the configuration of the positioning / fixing means of the press contact terminal 40 and the flat cable 30.
Next, the operation will be described.

First, as shown in FIG. 6, the press contact terminal 40 is placed on the receiving base 3a of the press contact terminal 40. At this time, the positioning holes 53 provided in the base plate 50 are
The device is placed in accordance with the positioning pins 5 provided in a. Thus, the press contact terminal 40 is positioned. Then, the portion of the base plate 50 is pressed against the positioned pressure contact terminal 40 by the toggle clamp 4 and fixed.

Next, as shown in FIGS. 3 and 4, the flat cable 30 is fitted into the positioning groove 11a of the positioning plate 11 and positioned, and the urethane rubber plate 1 is positioned.
2 is pressed and fixed by the toggle clamp 13. However, FIG. 4 illustrates a state in which the mold 20 is lowered and the pressing surface 21 is in contact with the upper surface of the flat cable 30. However, when positioning and fixing the flat cable 30, it is needless to say that the metal The mold 20 is retracted upward.

Next, the press-connecting mold 20 is lowered with respect to the press-connecting terminal 40 and the flat cable 30 which have been positioned and fixed. FIG. 7A shows a state in which the pressing surface 21 of the mold 20 is in contact with the upper surface of the flat cable 30 during the process. As shown in the figure, a portion of a core wire 31 is fitted in the guide groove 23 of the pressing surface 21.

At this time, although not shown, the guide gradient 24 of the pressing surface 21 of the mold 20 centers both edges of the flat cable 30 in a process immediately before the center wire, so that the core wire 31 is formed in the guide groove. 23 can be easily fitted.

In the apparatus of this embodiment, when the pressing surface 21 of the mold 20 comes into contact with the upper surface of the flat cable 30 as shown in FIG. 3A, that is, the core wire 31 is fitted into the guide groove 23. At this point, as shown in FIG. 4, the lower surface of the intermediate member 101 at the lower end of the elevating mechanism 100 is brought into contact with the upper end of the contact bolt 14 protruding from the upper surface of the positioning plate 11 of the flat cable 30. Is set to

Accordingly, when the mold 20 further descends from the state (a), the receiving plate 8 of the flat cable 30 also descends in synchronization therewith, so that the flat cable 30 is connected to the receiving plate of the mold 20 and the flat cable 30. It is not pulled by the mold 20 simply because it is sandwiched between and descends. Mold 2
The zero pressing surface 21 only keeps the flat surface of the flat cable 30 horizontal with the receiving plate 8 of the flat cable 30.

Therefore, in the apparatus of this embodiment, the flat cable 30 is kept horizontal and pressed against the terminal 40 without applying a pulling action to the flat cable 30.
No residual stress is generated at zero.

Subsequently, when the mold 20 is lowered to the state shown in FIG. 2B, the relief holes 22 (also serving as guide holes) of the press contact blades 42 of the mold 20 contact both edges of the press contact blades 42. Then, it starts to act to keep the press contact blade 42 in the upright state.

The mold 20 further descends and reaches its bottom dead center, and the pressure contact is completed as shown in FIG.

When the pressure welding is completed as described above, the receiving plate 8 of the flat cable 30 is, as described above, the notch plate 9 at the lower end of the slide shaft 6 to which it is attached.
The concave cable 9a engages with the ball plunger 1a on the side of the block 1 and the flat cable 3
The zero receiving plate 8 remains at the same height.

Therefore, when the mold 20 is raised and the fixing of the press contact terminal 40 and the flat cable 30 by the toggle clamps 4 and 13 is released, the flat cable 3
The connection body of 0 and the press contact terminal 40 can be taken out immediately.

Finally, a force is applied to the receiving plate 8 of the flat cable 30 to release the engagement between the concave portion 9a of the notch plate 9 at the lower end of the slide shaft 6 and the ball plunger 1a and return it to the home position. .

[0046]

As described above, according to the present invention, the positioned flat cable is pressed by the pressing surface having a width dimension larger than the width of the flat cable to press the flat cable against the press contact terminal. Are kept horizontal on the pressing surface and pressed against each other, so that the axis of each core wire and the center of the slot do not deviate, the pressing depths are equal at all the pressing positions, and the internal stress is generated in the bridge portion. There is no fear.

At this time, if a guide groove in which the core wire can be inserted is provided at a position corresponding to each core wire on the pressing surface of the pressing mold, the core wire inserted into the guide groove can be surely inserted. Since it is kept in a straight line, it is accurately guided into the slot.

Further, if a guide gradient for centering the flat cable is provided on the pressing surface of the pressing mold, the core wire is easily guided to the guide groove, and the accuracy of guiding the axis of the core wire to the center of the slot is improved. Further improve.

Further, the flat cable positioning / fixing means can be raised and lowered, and pressed down by a mold to be lowered, and simultaneously lowered when the pressing surface of the mold comes into contact with the upper surface of the flat cable. If the flat cable is lowered synchronously until it reaches the bottom dead center of the mold, the flat cable will not be pulled by the mold. Can be prevented.

Further, a lock mechanism for maintaining the positioning and fixing means of the flat cable at a predetermined height is provided, and when the press-connecting mold separates from the flat cable after the press-contact is completed, If you do not raise the flat cable at the same time, raise the mold,
If the fixing of the flat cable and the insulation displacement terminal is released, the connection body of the flat cable and the insulation displacement terminal can be immediately taken out, and workability is good.

[Brief description of the drawings]

FIG. 1 is a perspective view of an apparatus according to an embodiment.

FIG. 2 is a front view of the device of the embodiment.

FIG. 3 is a plan view of the device of the embodiment.

FIG. 4 is a side view of the device of the embodiment.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIGS. 6A and 6B show a press-contact terminal and a press-contact mold taken out, and are shown in a plan view in FIG. 6A and in a front view in FIG.

7A is a diagram showing a process of pressing after the state of FIG. 6B; FIG.
1 to (c).

FIG. 8 is a perspective view showing a target work of the apparatus.

[Explanation of symbols]

 Reference Signs List 1a Ball plunger 2 Base plate 3a Pressing terminal receiving base 4 Toggle clamp for terminal fixing 5 Positioning pin 8 Flat cable receiving plate 9 Notch plate 9a Depression 11 Flat cable positioning plate 11a Positioning groove 13 Flat cable fixing Toggle clamp 20 Mold 21 Pressing surface 22 Escape hole 23 Guide groove 24 Inclined surface (guide gradient) 30 Flat cable 31 Core wire 40 Pressure contact terminal 42 Pressure contact blade

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshio Yoneya 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi F-term in Harness Research Institute, Inc. (reference) 5E051 JA01 JA07 JB10 5G355 AA03 BA01 BA20 CA04 5G363 AA16 BA05 DA15 DC02

Claims (7)

[Claims] 1. A method of pressing each core wire of a flat cable having a bridge formed by an insulating resin between core wires to a press-contact terminal so as to maintain a pitch between the core wires at a predetermined value, comprising: The flat cable positioned and positioned above the pressure contact terminal is pressed by a pressing surface having a width dimension larger than the width of the flat cable so that each core wire is pressed against the corresponding pressure contact terminal. Pressure welding method for flat cable. 2. An apparatus for carrying out the method according to claim 1, wherein said press-connecting terminal positioning / fixing means, said flat cable positioning / fixing means, and said press-connecting die having said pressing surface. And a lifting mechanism for raising and lowering the press-connecting die, wherein a relief hole for a terminal is provided at a position corresponding to each press-connecting terminal on the pressing surface of the press-connecting die. apparatus. 3. The flat cable according to claim 2, wherein a guide groove in which the core wire can be inserted is provided at a position corresponding to each core wire of the flat cable on a pressing surface of the press-connecting mold. Flat cable pressure welding device. 4. The flat cable press apparatus according to claim 2, wherein a guide slope for centering the flat cable is provided on a pressing surface of the press-connecting die. 5. The positioned and fixed flat cable is lowered at the same time as the press-down mold descends and its pressing surface comes into contact with the flat cable, and thereafter synchronously until the mold reaches the bottom dead center. 2. The pressure welding method according to claim 1, wherein the pressure contact is lowered. 6. An apparatus for carrying out the method according to claim 5, wherein the positioning and fixing means for the flat cable in the apparatus according to any one of claims 2 to 4 is movable up and down, and the press-welding mold is provided. A flat cable press-contact device characterized in that the flat cable press-down device is pressed down by the pressure switch. 7. A flat cable press-connecting device according to claim 6, further comprising a lock mechanism for maintaining said flat cable positioning / fixing means at the same height after press-fitting. apparatus.