JPH0258845B2 - - Google Patents

Description

[Detailed description of the invention]

(a) Industrial Application Field The present invention relates to a stripping device for stripping a predetermined length of the end coating of a flat cable. (b) Prior art and its problems As shown in FIG. 1, a flat cable consists of a plurality of conductors 1 arranged in parallel and covered with an insulating coating 2. Unlike single-conductor cables, it is difficult to strip the terminal coating of this flat cable.
In order to streamline the work, the insulation coating 2 is formed by laminating two tapes 2a and 2b, and the terminal of one tape, for example 2b, is removed before lamination.
In many cases, it is necessary to cut out only the part indicated by the chain line in a. Note that 2c is a tape pasted for the purpose of reinforcing the removed portion of the tape 2b, and this reinforcing tape remains as it is even when the conductor is electrically connected. That is, the conductor usually has only its bare side in contact with the terminals of the connector. Conventionally, the end portion of the tape 2a of the above-described flat cable is removed manually using a jig as shown in FIG.
That is, the jig 3 is provided with an insertion groove 3a for the terminal conductor, a wedge portion 3b for peeling off the tape 2a, and a rotary cutter 3c that can move in the direction of arrow A and in the lateral direction (perpendicular to the plane of the paper). Push the end of the cable into 3a by hand in the direction of arrow B so that the tape 2a is positioned on the slope of the wedge. When it is in the state shown in the figure, insert the cutting edge of the cutter 3c into the base of the bent part of the tape 2a. Then, the cutter is moved laterally to cut off the terminal covering. However, this work is inefficient because it is done manually. In addition, since the cutting point of the tape changes depending on the magnitude of the pushing force in the B direction, which relies on the operator's intuition, there is a tendency to leave uncut portions of the tape that interfere with the connection of conductors. Relying on human intuition, the process was inaccurate and resulted in defective products, such as easily injuring the outside. (C) Means for Solving the Problems The present invention has been made with the aim of accurately and quickly stripping off the terminal coating of the tape-laminated flat cable, and the present invention has been developed to achieve this purpose. The stripping device uses a conveyor to move the cable positioned and placed on a flat workbench horizontally, and in the process of movement, applies strain to the end of the cable to strip the insulation coating from the conductor. Next, the peeled terminal coating is guided by the surface of the separation wedge, bent in a direction almost perpendicular to the conductor, and then bent into a guide groove with a slight step against the guide surface of the wedge. By guiding, the deviation of the cutting point is reduced, and furthermore, by cutting the base of the bent part with a fixed blade that is approximately parallel to the conductor, damage to the conductor is eliminated. (d) Embodiment The structure of the apparatus of the embodiment will be explained below based on the attached FIGS. 3 to 6, and then the operation of the apparatus will be explained in detail based on FIGS. 7 to 10. Reference numeral 10 in FIGS. 3 and 4 is a base plate, on which a workbench 11 with a flat upper surface is installed. Further, on the upper surface side of the workbench 11, a set reference surface 11 is provided on which the two sides of the flat cable are brought into contact.
A is formed in front of this surface in the direction of cable travel, a strain applying means 12, a separation wedge 13 for separating and bending the terminal coating from the conductor, and a vertical guide surface 13a of this wedge to the other end of the cable. A guide groove 14 with a step of l in the direction of separation from the side and a cutting blade 15 for cutting off the coating guided by the groove are provided. The strain force applying means 12 includes a groove 11b extending in the cable traveling direction and provided on the workbench 11, and a presser roller 12a disposed above the groove. Further, as shown in FIGS. 5 and 6, the separation wedge 13 is formed by cutting out one corner of a rectangular parallelepiped diagonally starting from one corner of the upper surface, and is cut with a surface 13b inclined in two axial directions. The movement of the insulation coating is guided by both vertical guide surfaces (side surfaces) 13a whose tips are on the movement start end side of the cable. Note that this wedge 13 has a recess 11c in the workbench 11, in which the height position of the upper surface 13c coincides with the upper surface of the workbench, and an insulating coating is provided between the vertical guide surface 13b and the workbench. Built to create a passageway. Further, a space 11d is left on the proximal end side of the wedge 13 to allow the insulation coating peeled off from the conductor to hang down. On the other hand, the guide groove 14 is formed by incorporating blocks 16 and 17, which are at the same height as the workbench, into a separated part of the workbench 11, leaving an appropriate gap between the opposing surfaces of both blocks, and the entrance thereof is In order to absorb the step difference l between the wedge 13 and the vertical guide surface, it is expanded gently. One block 16 is supported so as to be slidable in a direction perpendicular to the guide groove 14 in consideration of the slight error in the thickness of the insulation coating, and is fixed by a bullet 19 fitted onto a bolt 18. It is biased towards the 17 side. Further, the cutting blade 15 cuts the movable block 1 between the pair of blocks 16 and 17 in the middle of the guide groove 14.
It is suspended horizontally to allow movement of 6. Next, returning to FIGS. 3 and 4, the flat cable conveying means 20 will be explained. A slider 20a is provided above the cable set portion provided with the set reference surface. This slider has opposing plates 20b and 2 supported by a base plate.
A pair of guide rods 20c are suspended in parallel between the plates 20b, and are supported by the rods, and are moved using a cylinder 20d attached to one plate 20b as a driving source. Also, slider 2
A downward cylinder 20e is provided at the bottom of 0a, and a rubber pad 20g with a reinforcing material 20f attached to the rod end of this cylinder is used to press and clamp the flat cable set on the workbench 11 from above until the movement is completed. It is set as. As shown in FIG. 5, the stripping device configured as described above cuts a flat cable set on a workbench 11 with the sheathing (tape 2a explained in FIG. 1) 2 facing down. When the cable is moved laterally by the conveyance means 20 and slid between the presser roller 12a and the groove 11b of the strain force applying means 12, the cable end portion is bent to some extent as shown in FIG. The conductor 1 and the insulating coating 2, which were adhered to each other, are separated. Further, when the cable moves to the space 11d, the sheathing 2 peeled off from the conductor hangs down as shown in FIG. 8, and the gap between the peeled surfaces widens. Next, the cut end of the separation wedge 13 bites into the gap expanded by the continued movement of the cable, and the sheathing 2 guided by the surfaces 13b and 13a of this wedge is exposed to the upper surface of the wedge as shown in FIG. It is gradually pulled away from the conductor 1 guided by the conductor 13c and finally bent in a direction substantially perpendicular to the conductor 1. and,
In this state, it moves into the guide groove 14. Furthermore, the coating 2 that has moved into the guide groove is pushed toward the other end of the cable as shown by the chain line in FIG. 9 due to the step L shown in FIG. 10, and the radius of curvature of the bent portion becomes smaller. . Thereafter, the cable is cut from the base of the bent portion by a cutting blade 15 whose cutting edge is at approximately the same height as the running surface of the cable, and the coating stripping operation is thus completed. Note that it is preferable that the presser roller 12a be supported in a variable height position by an appropriate method, or supported in a vertically movable manner, and then urged toward the groove 11b by an elastic body. It is also possible to use a presser cam or the like. Further, the separating wedge 13 can be used regardless of its external shape as long as it has a separation surface for the conductor and insulation coating and a vertical guide surface that bends the insulation coating downward after separation.
The guide groove 14 also has a constant width, but may be formed by directly digging into the workbench 11. Further, in front of the guide groove 14, since the terminal conductor may be slightly deformed due to the addition of strain force, it is preferable to provide a correction presser cam 21 or the like for re-pressuring the conductor. In addition, as shown by the chain line in Fig. 8, the space 11d
If an air nozzle 22 is provided near the tip of the air nozzle 22, and the pressure of the air jetted from the tip of the air nozzle is used to separate the insulation coating from the conductor, the subsequent work can be carried out more accurately. The conveying means 20 is also not limited to the illustrated structure. For example, even if a cable clamp component is attached to a member that goes around a loop track, the above-mentioned work can be performed. In short, any cable that can be moved horizontally while keeping the cable in close contact with the workbench is sufficient. (f) Effects According to the stripping device of the present invention described above, while the flat cable is moved laterally by the conveyance means, the terminal coating is not peeled from the conductor due to the application of strain, and only the peeled coating is removed. Since the bending, the transfer of the covering to the guide groove, and the cutting from the base of the bent portion are performed successively, it is possible to reduce the number of man-hours and working time required for terminal processing. In addition, since the sheathing is cut with a cutting blade parallel to the conductor, the conductor surface is not damaged.Furthermore, due to the transition action of the separation wedge to the guide groove with a step to the guide surface, the conductor surface is not damaged. The deviation of the cutting point is also reduced. In order to confirm the above effects, an experiment was conducted using the apparatus of the example, and the results shown in the following table were obtained.

[Table] The time in the table above includes the time for setting up and taking out the cable.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a flat cable whose terminal is processed by the apparatus of the present invention, FIG. 2 is a side view showing a conventional stripping jig, and FIG. FIG. 4 is a plan view showing an example of the device, FIG. 4 is a side view thereof, FIG. 5 is a perspective view schematically showing the main parts of the device, and FIG. 6 is a place where the strain applying means and separation wedge are installed. The cross-sectional views, FIGS. 7 and 10, are diagrams showing the operation of the above-mentioned device in sequence. 10... Base plate, 11... Workbench, 1
1b...Groove, 11d...Space, 12...Strain force applying means, 12a...Press roller, 13...Separation wedge, 13a...Vertical guide surface, 13b...Slope surface, 13c...Top surface, 14 ...Guide groove, 15...
...cutting blade, 16...movable block, 17...fixed block, 19...munition machine, 20...transporting means.

Claims (1)

[Scope of Claims] 1. An insulating coating is formed by laminating two tapes, and one tape is applied to one side of a flat cable whose terminal portion has been removed in advance. A device for cutting off the remaining terminal covering, which includes a workbench with a flat upper surface;
The flat cable is set on the workbench with the insulating coating to be cut facing down, and is provided with a conveying means that presses and clamps the cable and moves it laterally, and applies a strain force that pressurizes and deforms the end of the cable while it is running on the workbench. A means, a space to allow the terminal sheathing separated from the conductor to sag, and a cutting point inserted between the conductor and the terminal sheathing to cut the separated terminal sheathing almost against the conductor on a vertical guide plane parallel to the direction of cable travel. A separation wedge bent at right angles, a guide groove with a slight step in the direction of shifting toward the other end of the cable with respect to the vertical guide surface, and a guide groove with an enlarged entrance, and an opening in the middle of this groove. A flat cable stripping device consisting of cutting blades that run horizontally parallel to the conductor in sequence in the direction in which the cable travels. 2. The strain force applying means includes a groove provided in the workbench,
A flat cable stripping device according to claim 1, characterized in that it comprises a presser roller or a presser cam located above the flat cable stripping device. 3. The gap formed between the opposing surfaces of the fixed block, whose top surface is at the same height as the top surface of the workbench, and the movable block, which is urged toward the fixed block by the bullet, is defined as the guide groove. A flat cable stripping device according to claim 1 or 2, characterized in that: