JP2019179675A - Terminal processing method for onboard twist pair cable and device therefor - Google Patents

Abstract

To perform accurate terminal processing even when an untwist length of a twist pair cable is short, and secure noise tolerance and properly put into a connector housing.SOLUTION: The terminal processing device of an onboard twist pair cable comprises: a sheath strip part 33 for removing a sheath 16 from a terminal of an onboard twist pair cable 14 to which the sheath 16 is externally attached; and a core wire coating strip part 37 for untwisting a core wire 15 exposed by removal of the sheath 16 for removing an insulation coating 15b of a terminal of the core wire 15, the parts being arranged in an order from an upstream side. The device further comprises an orientation adjustment/habit correction part 35 for adjusting an orientation in a peripheral direction of the core wire 15 to an orientation suitable for terminal connection and correcting a twisting habit of the core wire 15, the part being positioned at a rear part of the sheath strip part 33, including the sheath strip part.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an in-vehicle twisted pair cable terminal process for connecting a terminal to an in-vehicle twisted pair cable terminal.

  In order to connect the terminal to the terminal of the twisted pair cable, for example, as described in Patent Document 1 below, the terminal is connected through the following steps. Cutting process for cutting twisted pair cable, sheath strip process for removing sheath of twisted pair cable, unwinding process for untwisting exposed core wire, core wire covering strip process for removing insulation of core wire, terminal on conductor of core wire A terminal connection step of connecting The reason for untwisting is that the terminal of the core electric wire is too close to connect the terminals.

  The unwinding length is relatively long in a CAN (control area network) which is an in-vehicle network, and is allowed to be 40 mm to 50 mm. For this reason, the crimping operation for connecting the terminals and the operation for inserting the twisted pair cable to which the terminals are connected into the connector housing can be performed without any trouble even if the core wire has a twisted hook.

  However, in OABR, that is, the BroadR-Reach in-vehicle Ethernet (registered trademark) communication standard, the unwinding length is shorter than that in the case of CAN.

  If the untwisted length is short, the end portion is not free, and accuracy is liable to occur when the insulating coating strip or terminal is crimped. If there are twisted wrinkles in the untwisted part, the twisted wrinkles can also cause inaccuracy.

  Also, since the untwisted length is short, when inserting into the connector housing, it is necessary to insert the terminals connected to the pair of core wires at the same time. If there is a deviation in the tip position, there is a possibility that a defect may occur in insertion into the connector housing, such as one of the terminals being half-inserted.

JP 2017-147170 A

  Accordingly, the main object of the present invention is to enable accurate terminal processing even when the twist length is short.

  Here, the term “terminal processing” refers to processing or processing on the terminal of the in-vehicle twisted pair cable, including processing up to the core wire covering strip, processing up to terminal connection, and until the connected terminal is inserted into the connector housing. It is meant to include those that perform.

Means therefor include a step of unwinding the twisted core wire after the sheath strip step and before the core wire covering strip step, and in the circumferential direction of the core wire after the sheath strip step and before the terminal connecting step. And a direction adjusting step of adjusting the direction to a direction suitable for terminal connection.
The unwinding length of the core wire is preferably 10 mm to 20 mm. The untwisted length means the length of the portion extending linearly from the root position of the core electric wire that has been exposed after the sheath is removed.

  That is, after passing through a sheath strip step for removing the sheath with respect to the end of the in-vehicle twisted pair cable with the sheath sheathed, the core wire covering strip step for removing the insulation coating from the end of the core wire by untwisting the core wire Is a terminal processing method for an in-vehicle twisted pair cable that transitions to a terminal connection step of connecting a terminal to the core electric wire after passing through the sheath strip step and before the terminal connection step, and changes the orientation in the circumferential direction of the core electric wire. It is the terminal processing method of the vehicle-mounted twisted pair cable which has the direction adjustment process adjusted to the direction suitable for terminal connection.

  In this configuration, in the orientation adjustment step, the core wire insulation coating is removed or the terminal connection is made after making the orientation in the circumferential direction of the core wire suitable for the terminal connection. However, it is possible to accurately remove the insulation coating and connect the terminals. Insertion of the connected terminal into the connector housing can be performed without changing the posture.

  As an aspect of the terminal processing method of this in-vehicle twisted pair cable, the method includes a re-stretching step of untwisting the core wire that has been untwisted before the terminal connection step after the unwinding step of the core wire. It is good.

  In this configuration, the twisting of the core electric wire is taken and straightened in the retouching process, so that the work of removing the insulation coating of the core wire or connecting the terminal to the desired position, the desired dimension, It can be done with higher accuracy.

  In addition, as an aspect of the terminal processing method for the in-vehicle twisted pair cable, the twisted strands of the core wire that has been untwisted are corrected in synchronization with the unwinding step of the core wire or following the unwinding step. It is good also as what has a correction process.

  In this configuration, in the reworking process, the twisted wrinkles of the core wire are taken and straightened, so in addition to the work of removing the insulation coating of the core wire and connecting the terminals, other work such as the orientation adjustment process is also performed. , It can be performed with higher accuracy in a desired position and a desired size.

  In the case where the retouching step is included, the retouching step may be performed in synchronization with the orientation adjustment step as an aspect of the terminal processing method for the in-vehicle twisted pair cable.

  In this configuration, since the retouching process is performed in synchronization with the orientation adjusting process that needs to hold the in-vehicle twisted pair cable in the same manner as the retouching process, work efficiency is high and accuracy is obtained.

  As an aspect of the terminal processing method of the in-vehicle twisted pair cable, a length adjustment step of adjusting the length of the core electric wire protruding from the end of the sheath to an appropriate length after the sheath strip step and before the terminal connection step It may be included.

  In this configuration, since the protruding length of the core electric wire is set to an appropriate length in the length adjusting step, terminal connection can be performed with high accuracy and noise resistance can be ensured.

  When it has a length adjustment process, the said length adjustment process is good to be provided after the said correction process as an aspect of the terminal processing method of a vehicle-mounted twisted pair cable.

  In this configuration, since the length adjustment is performed after the correction is performed, the length adjustment itself can be performed with high accuracy.

  Another means is a method for manufacturing an in-vehicle twisted pair cable with a terminal for connecting the terminal to the end of the core electric wire processed by the in-vehicle twisted pair cable end processing method.

  Another means includes a sheath strip portion for removing the sheath from the end of the in-vehicle twisted pair cable with the sheath sheathed, and unwinding the core wire exposed by the removal of the sheath to insulate the end of the core wire. Is a terminal processing device for an in-vehicle twisted pair cable in which core wire covering strip portions are removed in order from the upstream side, and is suitable for terminal connection in the circumferential direction of the core wire from the sheath strip portion to the subsequent stage. It is the terminal processing apparatus of the vehicle-mounted twisted pair cable provided with the direction adjustment part adjusted to direction. “From” in “after the sheath strip portion” means to include the sheath strip portion.

  In this configuration, the orientation adjustment unit makes the orientation in the circumferential direction of the core wire suitable for terminal connection, and then the insulation coating of the core wire is removed or the terminal connection is made. However, these operations can be performed with high accuracy. Insertion of the connected terminal into the connector housing can be performed without changing the posture.

  As an aspect of the terminal processing device for the in-vehicle twisted pair cable, a refurbishment unit for untwisting the core wire that has been untwisted may be provided downstream from the unwinding unit for unwinding the core wire. “From” in “after the loosening part” means including the loosening part.

  In this configuration, the twisted portion of the core wire is taken and straightened at the straightened portion, so that the work of removing the insulation coating of the core wire or connecting the terminal is performed at the desired position and the desired size. Can be done with high accuracy.

  As an aspect of the terminal processing device for the in-vehicle twisted pair cable, the orientation adjusting unit may have a function of correcting the twist of the core electric wire that has been untwisted.

  In this configuration, since the orientation adjusting unit corrects the core electric wire, the apparatus can be simplified and work efficiency can be improved.

  As an aspect of the terminal processing device for this in-vehicle twisted pair cable, it is assumed that a length adjusting unit for adjusting the length of the core electric wire protruding from the end of the sheath to an appropriate length is provided downstream from the sheath strip portion. Also good. “From” in “after the sheath strip portion” means to include the sheath strip portion.

  In this configuration, since the length of the protruding portion of the core electric wire is set to an appropriate length by the length adjusting unit, terminal connection can be performed with high accuracy and noise resistance can be ensured.

  When it has a length adjustment process, the said length adjustment part is good also as what was provided in the back | latter stage from the said correction part as an aspect of the terminal processing apparatus of a vehicle-mounted twisted pair cable.

  In this configuration, since the length adjustment is performed after the correction is performed, the length adjustment itself can be performed with high accuracy.

  Another means is a device for manufacturing an in-vehicle twisted pair cable with a terminal provided with a terminal connecting portion for connecting a terminal to the end of the core electric wire, after the core wire covering strip portion in the end processing device for the in-vehicle twisted pair cable. is there.

  According to this invention, even if the twist length is short, the terminal processing can be performed with high accuracy.

The perspective view of a vehicle-mounted twisted pair cable with a terminal and a connector housing. The top view of a vehicle-mounted twisted pair cable. The flowchart of the manufacturing method of the vehicle-mounted twisted pair cable with a terminal. The schematic block diagram of the manufacturing apparatus of the vehicle-mounted twisted pair cable with a terminal. The perspective view which shows a loosening process. The perspective view of the holder holding an in-vehicle twisted pair cable. The side view of the holder holding a vehicle-mounted twisted pair cable. The perspective view which shows a direction adjustment process and a retouching process. The side view which shows a direction adjustment process and a retouching process. The top view which shows a direction adjustment process. The top view which shows a length adjustment process. The top view which shows a core wire covering strip process. The top view of a terminal. The partial cross section top view which shows a part of terminal connection process. The partial cross section top view which shows a part of terminal connection process. The top view which shows a part of terminal connection process. The top view which shows a part of terminal connection process. The top view which shows a part of terminal connection process. The top view which shows a part of terminal connection process. The top view which shows a part of terminal connection process. The schematic block diagram of the re-shaping machine for the re-warping process which concerns on another example. The general | schematic structure top view of the reworking machine for the reworking process which concerns on another example. FIG. 23 is a schematic side view of the rework molding machine of FIG. 22. The schematic block diagram of the re-shaping machine for the re-warping process which concerns on another example. FIG. 25 is a front view showing a schematic structure of the rework molding machine of FIG. 24. The front view which shows the other example of the core wire chuck | zipper part of FIG. Explanatory drawing of the example which performs direction adjustment in a sheath strip process.

An embodiment for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 shows a perspective view of a terminal portion of an in-vehicle twisted pair cable 11 with terminal (hereinafter referred to as “cable with terminal”) and a connector housing 13 into which the terminal 12 is inserted and held. The terminal 12 includes both a male type and a female type. In the illustrated example, the female type terminal 12 is illustrated.

  The terminal-attached cable 11 is configured by connecting the terminal 12 to an in-vehicle twisted pair cable 14 (hereinafter referred to as “twisted pair cable”).

  The twisted pair cable 14 is used to provide noise resistance, and a core wire 15 forming a built-in pair is stranded at a predetermined pitch. The core wire 15 is configured by covering a conductor 15a with an insulating coating 15b, and a sheath 16 is sheathed around the core wire 15 twisted together. The sheath 16 includes a filling type and a non-filling type, but any type of sheath structure may be used. Moreover, the core electric wire 15 is not limited to a pair like the example of illustration, You may have two or more pairs of core electric wires 15. FIG. In the illustrated example, the unshielded twisted pair cable 14 is shown because it is a vehicle-mounted one, so it does not matter whether or not there is a shield.

  In the cable with terminal 11, the twisted length of the twisted core wire 15 is set short as shown in FIG. 1 in order to give noise resistance as described above. The twist length may be about 40 mm to 50 mm in CAN (Control Area Network), but needs to be about 10 mm to 20 mm in OABR (BroadR-Reach In-vehicle Ethernet (registered trademark) communication standard). Here, the unwinding length is a length L of the core electric wire 15 that protrudes from the end of the sheath 16 and extends straight, as shown in the twisted pair cable 14 of FIG. 2, and is set to 10 mm to 20 mm.

  The manufacturing method of the in-vehicle twisted pair cable with terminal for manufacturing the cable with terminal 11 is a schematic configuration diagram showing the manufacturing apparatus 31 (hereinafter referred to as “manufacturing apparatus”) of the in-vehicle twisted pair cable with terminal in FIG. As shown, it has the following steps. That is, the process includes a sheath strip process in which the sheath 16 is removed from the end of the twisted pair cable 14 covered with the sheath 16, and a core wire in which the core wire 15 is untwisted to remove the insulation coating 15 b at the end of the core wire 15. A covering strip step and a terminal connecting step of connecting the terminal 12 to the core wire 15; And it has the direction adjustment process which adjusts the direction in the circumferential direction of the core electric wire 15 to the direction suitable for terminal connection before a terminal connection process after a sheath strip process.

  In addition to the orientation adjustment process, there are a re-stretching process for re-twisting the twisted core wire 15 and a length-adjusting process for adjusting the length of the core wire 15 protruding from the end of the sheath 16 to an appropriate length. is there. The retouching step is provided after the unwinding step of the core electric wire 15 and before the terminal connecting step, and the length adjusting step is provided after the sheath strip step and before the terminal connecting step.

  It is preferable that the retouching step is provided in synchronization with the unwinding step of the core wire 15 or subsequent to the unwinding step. Further, it is preferable that the retouching process is performed in synchronization with the direction adjusting process.

  The length adjustment step may be provided after the retouching step.

  The flowchart of FIG. 3 shows an example of a desirable process order among the manufacturing methods of the in-vehicle twisted pair cable with terminals that can be processed in various orders, and the manufacturing apparatus 31 shown in FIG. 4 performs the process shown in FIG. It is configured in a corresponding arrangement.

  That is, the manufacturing apparatus 31 includes a sheath strip process, a loosening process, an orientation adjustment process and a rectification process performed in synchronization, a length adjustment process, a core wire covering strip process, and a terminal connection process. In order, the following configuration is provided. The manufacturing apparatus 31 is exposed by removing the sheath 16 and the sheath strip portion 33 for removing the sheath 16 from the upstream side of the conveyance path 32 for sending the twisted pair cable 14 to the end of the twisted pair cable 14 with the sheath 16 sheathed. The unwinding part 34 for unwinding the core electric wire 15 and the orientation in the circumferential direction of the core electric wire 15 are adjusted to a direction suitable for terminal connection, and the twist adjustment of the core electric wire 15 that has been untwisted is adjusted. A length adjusting portion 36 for adjusting the length of the core wire 15 protruding from the end of the sheath 16 to an appropriate length, and a core wire covering strip portion 37 for removing the insulating coating 15b at the end of the core wire 15 The terminal connection part 38 which connects the terminal 12 to the core electric wire 15 is provided.

  Next, each part of the manufacturing apparatus 31 will be described.

  As shown in FIG. 4, which is a schematic plan view of the manufacturing apparatus 31, the manufacturing apparatus 31 has a measuring unit 31 a that measures and cuts the twisted pair cable 14 supplied to the conveyance path 32 at the most upstream position. At the most downstream position, there is a discharge portion 31b for discharging the manufactured cable 11 with a terminal. The measuring portion 31a measures the length of the twisted pair cable 14 that is sequentially drawn out and supplied to the conveyance path 32, and cuts the twisted pair cable 14 by a predetermined length. Although the discharge part 31b discharges the manufactured cable 11 with a terminal, it is good also as what performs the terminal insertion process which inserts the terminal 12 with respect to the following connector housing 13, if necessary.

  The conveyance path 32 is provided in a straight line on the table 31c, and includes a fixed side chuck 41 fixed on the table 31c and a moving side chuck 43 fixed on a slide plate 42 slidably moved by an actuator. ing. The fixed side chuck 41 and the moving side chuck 43 are configured by an appropriate device such as an air chuck, and hold the twisted pair cable 14 by opening and closing. A plurality of fixed side chucks 41 and moving side chucks 43 are provided at regular intervals.

  The plurality of fixed side chucks 41 are, in order from the upstream side, a measuring portion 31a, a sheath strip portion 33, a loosening portion 34, an orientation adjustment / retouching portion 35, a length adjustment portion 36, a core wire covering strip portion 37, and a terminal connection. The unit 38 is provided. For the purpose of enabling a plurality of types of terminals 12 to be connected to the terminal connecting portion 38 and the purpose of dealing with differences in the manner of terminal connection with respect to the core wires 15 that make a pair, a crimping device as an example of a terminal connecting device Since a plurality of 44 are provided, a plurality of fixed side chucks 41 are also provided.

  The plurality of moving-side chucks 43 are disposed on the slide plate 42 so as to face the fixed-side chuck 41, and the sliding plate 42 is disposed at the downstream side in the conveying direction with the arrangement interval of the fixed-side chuck 41 or the moving-side chuck 43. The drive is controlled to reciprocate the distance. The driving of the slide plate 42 is controlled in synchronization with the opening and closing of the fixed side chuck 41 and the moving side chuck 43. This control is performed as follows.

  That is, after the twisted pair cable 14 held by the fixed side chuck 41 is held by the moving side chuck 43, the holding by the fixed side chuck 41 is released, and the slide plate 42 is moved downstream. Thereby, the moving side chuck 43 holding the twisted pair cable 14 moves one step downstream, and the twisted pair cable 14 is moved onto the fixed side chuck 41 in the next stage. After the twisted pair cable 14 is held by the moving side chuck 43 that holds the twisted pair cable 14 and the fixed side chuck 41 that newly receives the twisted pair cable 14, the holding by the moving side chuck 43 is released. Thereafter, the slide plate 42 is moved one step upstream in the transport direction. By repeating such a control operation, the twisted pair cable 14 cut into a predetermined length by the measuring portion 31a is conveyed while being sequentially processed. The twisted pair cable 14 is conveyed in a state of being bent in a U shape in plan view, and after processing one terminal located on the downstream side, the other terminal located on the upstream side is processed.

  The sheath strip portion 33 at the rear stage of the measuring portion 31a removes the outermost sheath 16 by a predetermined length and includes a known strip device 45. That is, when the end of the twisted pair cable 14 is inserted into the strip device 45, the sheath 16 having a preset length is removed. The length of the sheath 16 to be removed is set to be equal to or slightly longer than the desired twisting length. Since the core wire 15 is twisted, the length of the sheath 16 to be removed can be set slightly shorter than the desired twisted length. In this case, the sheath strip process can also serve as the length adjusting process.

  In the loosening part 34 at the rear stage of the sheath strip part 33, the sheath 16 is removed, and the core electric wires 15 that have been exposed are untwisted. The loosening portion 34 is appropriately configured, and for example, a comb-like loosening jig 46 as shown in FIG. 5 may be provided.

  The unraveling jig 46 has a plurality of protrusions 46b arranged in a line on the upper surface of the plate-like base 46a with an interval corresponding to the thickness of the core electric wire 15. The interval commensurate with the thickness of the core electric wire 15 is an interval that is not too wide to accommodate the entire twisted core electric wire 15 among the intervals in which the core electric wire 15 can be accommodated between the protrusions 46b.

  The protrusion 46 b has a circular cross section, and the upper end side is formed thinner than the lower side part and is longer than the thickness of the twisted pair cable 14. The number of the protrusions 46b is set to three in the illustrated example in consideration of workability for untwisting the two core electric wires 15. However, if the protrusion 46b is accurately inserted between the core electric wires 15, the number of the protrusions 46b is one. You can also The number of the protrusions 46b may be more than three.

  The loosening jig 46 is supported by an appropriate driving device (not shown) that moves up and down and moves back and forth. The driving device drives the unwinding jig 46 to move relative to the core electric wire 15 to untwist the core electric wire 15, that is, to remove the entangled portions of the core electric wires 15.

  The drive device is controlled to perform the following operation, for example. As shown by the phantom line in FIG. 5, the loosening jig 46 is raised with respect to the held twisted pair cable 14, and the protrusion 46 b is inserted between the core electric wires 15, preferably in the longitudinal direction of the core electric wires 15. Is moved to the terminal side (forward). Thereafter, the loosening jig 46 is lowered and returned to the original position.

  Since the protrusion 46b of the unwinding jig 46 is formed to be longer than the thickness of the twisted pair cable 14, the degree of freedom of movement of the core wire 15 during the unwinding operation as described above is high. Resistance generated between them can be reduced.

  When performing the loosening operation, for example, when the sheath 16 is of an unfilled type, the end of the sheath 16 close to the root of the exposed core wire 15 is held and positioned in the sheath 16 if necessary. It is preferable not to affect the twisting of the core wire 15 to be performed.

  In addition to moving the unwinding jig 46, the unwinding operation can be performed by moving the twisted pair cable 14 relative to the unwinding jig 46 or by moving both of them.

  The rear direction adjustment and retouching portion 35 of the loosening portion 34 is a direction in the circumferential direction of the core wire 15 of the twisted pair cable 14 conveyed toward the terminal connection portion 38, that is, a portion where the core wire 15 comes out from the end of the sheath 16. Is the orientation suitable for the terminal connection, specifically, the center of the cross section of the core wire 15 is aligned horizontally in the horizontal direction, and which of the paired core wires 15 is the left side or the right side Correctly adjust so that the terminal can be connected as it is. Moreover, the twisted wrinkles of the core electric wire 15 are removed, and the core electric wire 15 is made straight.

  Although the orientation adjustment / retouching portion 35 is also appropriately configured, here, a method of straightening the core electric wire 15 using the holder 47 as shown in FIG. 6 is adopted. The holder 47 is sequentially transported in the subsequent steps and is transported without changing the orientation of the twisted pair cable 14 in the circumferential direction until the terminal connection at the terminal connection portion 38 is completed.

  The holder 47 has a planar base plate 48 and an upper lid 49 that overlap each other in a plan view, and the lower base 48 has a substantially semicircular thick groove 48a into which the end of the sheath 16 of the twisted pair cable 14 is fitted, and a thick groove 48a. A short narrow groove 48b is formed on the upper surface. The narrow groove 48b is formed to be narrower than the thick groove 48a, and the thickness of the narrow groove 48b is a thickness to which the core electric wire 15 is fitted. The upper lid 49 has a groove portion 49a having a substantially semicircular cross section at a portion facing the thick groove 48a of the lower base 48. The upper lid 49 is vertically positioned at a position in front of the groove portion 49a and corresponding to the narrow groove 48b of the lower base 48. It has an inspection window 49b made of a through hole.

  The lower base 48 and the upper lid 49 are illustrated so as to sequentially move to the downstream side step by step in synchronization with the movement of the moving side chuck 43 to the downstream side, and to circulate from the orientation adjustment / rework portion 35 to the discharge portion 31b. Not supported by the drive.

  Further, the lower base 48 and the upper lid 49 are supported so as to be movable upward as shown in FIG. The twisted pair cable 14 can be transported by raising the lower base 48, and the twisted pair cable 14 can be held and released by raising the upper lid 49. In FIG. 7, 51 is a guide rod, 52 and 53 are actuator piston rods.

  Each portion after the orientation adjustment / retouching portion 35 is provided with a planar plate-like support member 55 as shown in FIG. Wait for the core wire 15. In order to enable the twisted pair cable 14 to be transported, it is only necessary to be able to move relative to the holder 47. Instead of moving the holder 47 upward as described above, the support 55 may be lowered. Good.

  The support tool 55 of the orientation adjustment / retouching part 35 is a correction tool 55a as shown in FIG. 8 and is formed to have the same thickness as the lower base 48 of the holding tool 47. A correction groove 56 having a length substantially corresponding to the length of the core electric wire 15 exposed from the terminal is formed. The straightening groove 56 removes the twisted wrinkles of the fitted core wire 15 and straightens it. The straightening groove 56 is thick enough to fit into the core wire 15 and has the same depth as the diameter of the core wire 15. It is preferable that it is comprised. In order to efficiently perform twisting and reworking, the corrector 55a can be provided with a heating means (not shown).

  When heating is performed, the temperature and the application time are set in a range in which the insulating coating 15b is not deformed or discolored. When the insulating coating 15b is made of, for example, a polyolefin-based material, the temperature is 140 ° C. or less, and the application time is appropriately set depending on the thickness of the insulating coating 15b.

  An appropriate chuck (not shown) that holds the end of the sheath 16 of the transported twisted pair cable 14 and rotates the twisted pair cable 14 forward and backward around the axis (circumferential direction) is provided in the orientation adjusting and retouching portion 35. In addition, a pressing means (not shown) constituted by a plate material, a roller or the like is provided. The chuck is for adjusting the orientation, and the pressing means is for fitting the end of the twisted pair cable 14 into the lower base 48 of the holder 47 and the correction tool 55a.

  As shown in FIG. 9, the orientation adjustment / retouching unit 35 is also provided with an imaging camera 57 on the upper side. The imaging camera 57 is used for correctly adjusting the orientation of the core wire 15 and for checking whether the orientation adjustment has been made correctly, that is, whether the paired core wires 15 are correctly aligned on the left and right. It is.

  The imaging camera 57 is connected to a control unit (not shown) together with the aforementioned chuck. Based on the image obtained by the imaging camera 57, the control unit grasps the positional relationship of the core electric wire 15 from the color of the insulation coating 15b of the core electric wire 15, and rotates with the above-described chuck so that the core electric wire 15 is in the correct position. . The rotation may be performed in one direction, but it is preferable that the rotation is forward and reverse as described above and the rotation amount is minimized.

  Further, a display 58 is provided near the holder 47 on the table 31c as shown in FIGS. The display 58 is also connected to the control unit together with the above-described imaging camera 57, and the control unit makes an error in the orientation adjustment process based on the image of the imaging camera 57 that has passed through the observation window 49b of the upper lid 49 in the holder 47. As shown in FIG. 10, the result is displayed by lighting the lamps 58a and 58b of the display 58.

  As shown in the diagram on the left side of FIG. 10, if there is no specific core wire 15 on the side where there should be, an NG determination is made that there is an error, and one lamp 58 a is turned on. In this case, the orientation adjustment is performed again. On the other hand, as shown in the diagram on the right side of FIG. 10, if there is no mistake, OK determination is performed, the other lamp 58b is turned on, and the process proceeds to the next step.

  The length adjusting unit 36 at the rear stage of the orientation adjusting / retouching unit 35 adjusts the length of the exposed core wire 15 by cutting it to an appropriate length. For this reason, as shown in FIG. 11, a known cutting device 59 is provided, and a support 55 for adjustment is provided as a support 55 that stands by. The adjustment support tool 55b is formed to be shorter in length than the correction tool 55a that is the support tool 55 of the above-described orientation adjustment and correction part 35, but the support groove 61 is formed in the same manner as the correction groove 56 of the correction tool 55a. Have. The support groove 61 may be slightly thicker and shallower than the correction groove 56.

  The cutting device 59 is provided at the tip of the adjustment support tool 55 b, moves relative to the core wire 15, cuts the distal end portion of the core wire 15, and projects the core wire 15 protruding from the end of the sheath 16. The length is set to a predetermined length L1.

  In the illustrated example, the lengths of the two core electric wires 15 are equalized, but the lengths required for the left and right core electric wires 15 may differ depending on the shape of the terminal 12 to be connected.

  The core wire covering strip portion 37 following the length adjusting portion 36 removes the insulating coating 15b at the end of the core wire 15 by a predetermined length. Therefore, as shown in FIG. 12, a known strip device 62 is provided, and a strip support 55c is provided as a stand-by support 55. The strip support 55c is formed to be shorter than the adjustment support 55b described above, but has a support groove 63 similar to the support groove 61 of the adjustment support 55b.

  The strip device 62 is provided at the tip of the strip support 55c in the same manner as the length adjusting unit, and moves relative to the core electric wire 15 so that the insulating coating 15b at the end of the core electric wire 15 has a predetermined length. L2 is excised to expose the conductor 15a.

  The terminal connection portion 38 at the rear stage of the core wire covering strip portion 37 connects the terminal 12 to all the core electric wires 15 of the twisted pair cable 14. Here, an example in which a crimp terminal connected by crimping as shown in FIG. 1 is used as the terminal 12 will be described.

  The terminal 12 is one in which the end of the insulating coating 15b of the core wire 15 and the portion corresponding to the exposed conductor 15a are compressed and deformed and connected to the core wire 15. In the illustrated example, an open barrel type crimp terminal is shown. However, it may be a closed barrel type crimp terminal or a crimp terminal of another shape. The crimping of the terminal 12 is performed by inserting the end of the core wire 15 into the held terminal, and this crimping is performed using a known crimping device 44.

  As described above, since the twisted length of the twisted pair cable 14 is short, the core wire 15 to which the terminal 12 is connected is not free. For this reason, as shown in FIG. 13, there is a case where the terminal 12 is of a chain type, and in a state where the terminal 12 remains connected, crimping by a conventional method may not be possible.

  Here, two connection methods will be described. One is a case where the terminals 12 are simultaneously crimped to the two core electric wires 15, and the other is a case where the terminals 12 are crimped separately.

  When the terminals 12 are simultaneously crimped, a terminal block 64 as shown in FIG. 13 is used. The terminal block 64 holds the portion (tip side portion 12a) on the opposite side to the side where the core wire 15 is connected in the terminal 12 vertically and horizontally, and is formed in a substantially rectangular parallelepiped shape as a whole, and the tip side portion 12a. Are held in parallel and have two substantially rectangular parallelepiped holding holes 64a. The interval W between the holding holes 64a is matched to the interval between the core wires 15 forming a pair. This terminal block 64 is provided in the crimping device 44, and the distal end side portion 12a of the individually separated terminal 12 is inserted to prepare for crimping.

  At the position where the crimping device 44 is desired in the terminal connection portion 38, as shown in FIG. The crimping support tool 55d is formed to be longer than the strip support tool 55c, but has a support groove 65 in the same manner as the support groove 63 of the strip support tool 55c.

  When crimping is performed after the end of the core wire 15 is inserted into the terminal 12 by relative movement of the crimping device 44 and the core wire 15, the terminal 12 is connected to the end of the paired core wire 15 as shown in FIG. 15. It will be connected at the same time.

  When crimping the terminals 12 separately, as shown in FIG. 16, an individual crimping support 55 e is provided as a stand-by support 55. The individual crimping support tool 55e has two support grooves 66 extending in a direction crossing a predetermined angle that opens and holds the terminal side of the core wire 15 forming a pair.

  The holding tool 47 and the individual crimping support 55e are provided on a turntable (not shown), so that relative rotation between the part having the holding tool 47 and the individual crimping support 55e and the crimping device 44 is possible. And is supported so as to be relatively movable in the front-rear direction (in the contact / separation direction).

  A chain type terminal 12 is used as it is for the terminal 12 provided in the crimping device 44.

  The portion having the holder 47 and the individual crimping support 55e is driven and controlled to operate as follows with respect to the crimping device 44.

  As shown in FIG. 16, the core wire 15 located downstream in the transport direction of the two core wires 15 aligned in the transport direction is rotated so as to be straight with respect to the terminal 12, and then 17, the end of the core wire 15 is inserted into the terminal 12. In this state, the terminal 12 is crimped by the crimping device 44 and, as shown in FIG. 18, after the core wire 15 is separated from the crimping device 44, the core wire 15 positioned on the upstream side in the conveying direction is connected to the terminal 12. The terminal 12 of the core wire 15 that has been rotated is inserted into the terminal 12 and is crimped by the crimping device 44. After the core wire 15 is separated from the crimping device 44, the rotation posture is returned to the original position as shown in FIG. Since the twisted pair cable 14 is conveyed in a state of being curved in a U shape in plan view as described above, there is a margin for allowing the rotation as described above.

  For the core wire 15 to which the terminal 12 is connected, the individual crimping support 55e is removed by the drive of the drive unit described above, and an appropriate combination of a rotating roller 67 provided in the vicinity as shown in FIG. The pressing means 68 is actuated to extend the two core electric wires 15 straightly. The rotation roller 67 is supported so as to be rotatable, movable in the contact / separation direction from the outer side in the left-right direction, and movable in the longitudinal direction of the extended core wire 15.

  Since a plurality of the crimping devices 44 are provided as described above, one crimping device 44 performs crimping on the two core electric wires 15, and each crimping on the two core electric wires 15 is performed by another crimping device 44. It may be a configuration. That is, after connecting to the core wire 15 located on the downstream side with the crimping device 44 located on the upstream side, the connection is made to the core wire 15 located on the upstream side with the crimping device 44 located on the downstream side. You can also.

  The discharge part 31b at the rear stage of the terminal connection part 38 is provided with an appropriate chuck (not shown) for gripping and taking out the twisted pair cable 14 from which the upper lid 49 of the holder 47 is removed from the holder 47.

  In the manufacturing apparatus 31 configured as described above, the orientation adjustment and retouching unit 35 removes the insulation coating 15b of the core wire 15 after setting the direction in the circumferential direction of the core wire 15 to be suitable for terminal connection. Since the terminal 12 is connected, the work of removing the insulation coating 15b and connecting the terminal 12 can be performed with high dimensional accuracy even if the unwinding length is short. Moreover, since the core wire 15 is straightened by correcting the twist of the core wire 15 before the terminal connection, the length of the core wire 15 is adjusted, the insulation coating 15b of the core wire 15 is removed, and the terminal 12 Can be connected as desired with higher dimensional accuracy.

  Further, the terminal of the twisted pair cable 14 to be conveyed is held by the holding tool 47 that is adjusted and held, and is conveyed and processed in its posture, so that highly accurate processing can be performed.

  The terminal-attached cable 11 thus obtained comes out of the untwisted length of the core wire 15, the exposed length of the conductor 15 a, the connection position of the terminal 12 with respect to the core wire 15, and the end of the sheath 16 of the core wire 15. Since the accuracy of the position of the root portion in the circumferential direction, that is, the direction of the terminal 12 inserted into the connector housing 13 is high, the inserted terminal 12 is inserted into the connector housing 13 without any change in posture. Easy to do. Even if the terminal 12 is inserted, the core wire 15 is not twisted. In addition, even if a plurality of terminals 12 are inserted at the same time, it is possible to avoid inconveniences such as half insertion.

  Since the length adjusting step is performed after the retouching step, the length can be adjusted with high accuracy, and the high accuracy can be further enhanced.

  Further, since the dimensional accuracy is high, desired noise resistance can be obtained.

  Furthermore, since the retouching process and the orientation adjustment process are performed in synchronization, the working efficiency is good and the manufacturing apparatus 31 can be simplified.

  Since reworking is performed mechanically, it can be performed in a shorter time than with manual operation.

  Other examples will be described below. In this description, the same parts as those described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  As described above, the retouching process can be carried out by fitting into a mold and correcting it, or by applying pressure and positively stretching.

  FIG. 21 is a plan view showing a schematic structure of an example of the retouching molding machine 71, and includes a pair of pressure rollers 72 that rotate forward and reverse, and an interposition member 73 provided between the pressure rollers 72. The pressure roller 72 has a forming groove 72a having a semicircular cross section in the circumferential surface. The interposition member 73 is made of a material having a smooth surface, and has sliding contact surfaces 73a facing the forming grooves 72a of the pressure roller 72 on both sides. The slidable contact surface 73a is a surface that is in contact with the core electric wire 15 that is relatively moved by the rotation of the pressure roller 72, and is formed in a squeezing manner, and is configured by a curved surface.

  A heating means (not shown) is connected to the pressure roller 72 so that the core wire 15 can be heated at a predetermined temperature for a predetermined time.

  The pressure roller 72 may be supported so as to be movable in a direction away from the direction in which the pressure rollers 72 approach each other, or may be supported by being biased in the direction in which the pressure rollers 72 approach each other.

  Such a retouching molding machine 71 sandwiches the end of the core wire 15 exposed from the end of the sheath 16 between the pressure roller 72 and the interposition member 73. When the pressure roller 72 is configured to be movable in the separating direction, the paired pressure roller 72 is opened and the core electric wire 15 is set. With the rotation of the pressure roller 72 in the direction in which the core electric wire 15 is sent out, the pressure roller 72 moves relatively and approaches the end of the sheath 16. When the pressure roller 72 comes into contact with the sheath 16, the rotation of the pressure roller 72 is stopped, and then the pressure roller 72 is reversely rotated. As a result, the core electric wire 15 is pushed forward, and the core electric wire 15 is detached from the pressure roller 72. When the pressure roller 72 is configured to be movable in the separating direction, the pair of pressure rollers 72 may be opened to take out the core electric wire 15.

  By being sandwiched between the pressure roller 72 and the interposition member 73 under pressure and heating, the core wire 15 is straightened by removing the twisted wrinkles of the core wire 15.

  When the pressure roller 72 is configured to be movable in the separating direction, the core electric wire 15 is set at the base portion of the core electric wire 15, that is, the position closest to the end of the sheath 16. After the relative movement is performed so as to be pushed out to the side, pressurization is performed, and then the core electric wire 15 is relatively moved in the forward feeding direction to be molded.

  FIG. 22 is a plan view showing a schematic structure of another example of the retouching molding machine 71, and FIG. 23 is a side view thereof, which includes a pair of pressure rollers 72 that rotate forward and backward. The pressure roller 72 has two forming grooves 72a on the peripheral surface so that the two core electric wires 15 can be formed simultaneously. The shape of the forming groove 72a has a semicircular cross section. Such a pressure roller 72 is disposed above and below the portion from which the core electric wire 15 is inserted, and is movable in the vertical direction that is close to and away from each other, as shown in FIG. It is supported so as to be movable in the direction.

  A heating means (not shown) is also connected to the pressure roller 72 so that the core electric wire 15 can be heated.

  In such a retouching molding machine 71, the core electric wire 15 is inserted between the pressure rollers 72 spaced apart from each other, the pressure roller 72 is brought close to the core electric wire 15 and the pressure roller 72 is rotated forward and backward. . That is, the pressure roller 72 is rotated so as to move from the set position in the length direction of the core electric wire 15 to the sheath 16 side or the terminal side, and then reversely rotated. The core electric wire 15 is twisted by the pressure and heat generated by the pressure roller 72, and the core electric wire 15 extends straight.

  If the core electric wire 15 is set to the base portion of the core electric wire 15 close to the end of the sheath 16, a difference in length is less likely to occur in the paired core electric wires 15 after molding.

  FIG. 24 is a plan view showing a schematic structure of another example of the retouching molding machine 71, and includes a core wire chuck portion 74 that holds the tip of the core electric wire 15. The retouching molding machine 71 is configured to relatively rotate the core electric wire 15 in the direction of untwisting the twist due to twisting.

  That is, as shown in FIG. 25 which is a front view showing a state where the tip of the core electric wire 15 is gripped by the core wire chuck portion 74, the core wire chuck portion 74 is constituted by an air chuck or the like, and the axis of the twisted pair cable 14 Is supported by an appropriate rotation support device so as to be rotatable forward and backward. The twisted pair cable 14 is appropriately supported, but if necessary, as shown by the phantom line in FIG. 24, a holding means 75 including an air chuck for holding the end of the sheath 16 may be additionally provided. The holding means 75 can also be provided with an actuator that rotates forward and backward.

  Further, although not shown, an imaging camera for imaging the terminal of the twisted pair cable 14 is provided at an appropriate position around the core wire chuck portion 74. The position where the imaging elephant camera is provided is appropriately set according to the type and function of the imaging camera, but it is preferable that the position above the core electric wires 15 arranged on the left and right in the transport direction is higher. In addition to being on the upper side, it is possible to set the side surface or the tip direction of the core wire 15. A plurality of imaging cameras may be provided.

  The imaging camera, the core wire chuck unit 74, the drive unit that rotates the core wire chuck unit 74, and the like are controlled by a control unit (not shown).

  Control by the control unit is performed as follows. Based on the image of the terminal of the core wire 15 that has been pushed out, the control unit causes the core wire chuck unit 74 to change the posture in a direction in which the core wire 15 can be easily gripped and to grip it. Subsequently, the control unit rotates the core wire chuck unit 74 in the direction of untwisting to untwist. The rotation direction is set to a direction that can reduce the rotation amount.

  When the core electric wire 15 is straightened by the rotation, the rotation of the core wire chuck portion 74 is stopped. Thereafter, the control unit opens the core wire chuck portion 74 and releases the holding of the tip of the core electric wire 15.

  In such a re-stretching machine 71, twisting is performed by twisting the core electric wire 15, so that re-stretching can be performed cleanly.

  The core wire chuck portion 74 holds the end portion of the core wire 15 so as to be openable and closable. However, as shown in FIG. 26, the core wire chuck portion 74 is held flexibly and allows relative rotation on the surface of the core wire 15 that contacts the insulating coating 15b. A pad 74a made of a material to be used may be provided. If comprised in this way, since relative rotation is possible between the pad 74a and the core electric wire 15, compared with the case where it hold | maintained so strong that it does not rotate relatively with the core wire chuck | zipper part 74, the twist of the insulation coating 15b is carried out. You can retouch cleanly while eliminating.

  In addition, since the re-stretching machine 71 twists the core wire 15 to re-stretch as described above, the unwinding process can be simultaneously performed. If the orientation adjustment is also performed in synchronization using the imaging camera, the orientation adjustment can be performed in the loosening portion. As described above, the retouching process can be performed in synchronization with the orientation adjustment process as described above, or can be performed simultaneously with the unraveling process.

  Further, the retouching step may be performed separately from the orientation adjusting step, and may be performed separately in addition to the above-described steps shown in FIG. If a retouching step is added separately, better retouching can be realized. For example, a retouching process performed in synchronization with the orientation adjustment process of the flowchart shown in FIG. 3 is performed manually, and thereafter, a mechanical retouching as in each of the above examples is added separately. Can do.

  Furthermore, the orientation adjustment process can be performed in a sheath strip process.

  That is, in the twisted pair cable 14, as shown in FIG. 27, the paired core electric wires 15 are offset at a constant pitch. Therefore, when the paired core electric wires 15 are viewed in a plan view, If the sheath 16 is removed from the position where it is correctly aligned, the exposed root portion of the end of the sheath 16 of the core wire 15 is naturally aligned correctly in the horizontal direction. 27A is a plan view, and FIG. 27B is a side view.

  Specifically, as shown in FIG. 27, after the cross-sections of the core electric wires 15 exposed at the end face of the twisted pair cable 14 are aligned correctly in the horizontal direction, the twist pitch that is longer than the desired twisting length. The sheath strip is measured by measuring the position of the unit length. The state of the end face of the twisted pair cable 14 can be confirmed with the imaging camera 57. When the inside of the twisted pair cable 14 can be confirmed by an image or the like, the sheath strip is performed at a position where the roots of the core electric wires 15 that appear on the end face when the sheath strip is performed are aligned correctly in the horizontal direction.

  As described above, the terminal cable 11 can be processed in various orders. The main examples of the order of steps other than those shown in the flowchart of FIG. 3 are shown below.

  One is the order of the sheath strip process, the loosening process, the retouching process, the orientation adjusting process, the length adjusting process, the core wire covering strip process, and the terminal connecting process.向 き The orientation can be adjusted accurately since the orientation is adjusted after retouching.

  The length adjustment step and the orientation adjustment step may be interchanged, and the sheath strip step, the loosening step, the retouching step, the length adjustment step, the orientation adjustment step, the core wire covering strip step, and the terminal connection step may be performed in this order. Since the orientation adjustment is performed immediately before the core wire covering strip step, it contributes to the improvement of accuracy in the case of a configuration in which the orientation adjustment once performed is difficult to maintain.

  In addition, the sheath strip process, the loosening process, the length adjustment process, the retouching process, the orientation adjustment process, the core wire covering strip process, the terminal connection process, or the reshuffling and orientation adjustment are replaced in order, the sheath strip process, The unwinding step, the length adjusting step, the orientation adjusting step, the retouching step, the core wire covering strip step, the terminal connecting step, or the retouching step is positioned immediately before the core wire covering strip, and the sheath strip step and 11, The unwinding process and 17, the orientation adjusting process and 14, the length adjusting process and 16, the retouching adjusting process and 15, the core wire covering strip process and 12, and the terminal connecting process and 13 can be performed in this order.

  The above-described configuration is one form for carrying out the present invention, and other configurations can be adopted.

  For example, each process, particularly the loosening process, the orientation adjusting process, and the retouching process may be performed manually.

DESCRIPTION OF SYMBOLS 11 ... Vehicle-mounted twisted pair cable with terminal 12 ... Terminal 14 ... Vehicle-mounted twisted pair cable 15 ... Core electric wire 15b ... Insulation coating 16 ... Sheath 31 ... Manufacturing apparatus of vehicle-mounted twisted pair cable with terminal 32 ... Conveyance path 33 ... Sheath strip part 34 ... Loosening part 35 ... Direction adjustment and retouching part 36 ... Length adjustment part 37 ... Core wire covering strip part 38 ... Terminal connection part

Claims (14)

After undergoing a sheath strip process for removing the sheath with respect to the terminal of the in-vehicle twisted pair cable with the sheath sheathed, via a core wire covering strip process for unwinding the core electric wire and removing the insulation coating at the end of the core electric wire A terminal processing method for an in-vehicle twisted pair cable that shifts to a terminal connection step of connecting a terminal to the core electric wire,
A terminal processing method for an in-vehicle twisted pair cable including a direction adjusting step of adjusting a direction in the circumferential direction of the core electric wire to a direction suitable for terminal connection after the sheath strip step and before the terminal connecting step. The terminal treatment method for an in-vehicle twisted pair cable according to claim 1, wherein the unwinding length of the core electric wire is 10 mm to 20 mm. The in-vehicle twisted pair cable according to claim 1 or 2, further comprising a step of rewinding the twisted wire of the core wire that has been untwisted before the terminal connection step after the step of unwinding the twist of the core wire. Terminal processing method. 3. The method according to claim 1, further comprising a step of rewinding the twisted wire of the core wire that has been untwisted in synchronization with the unwinding step of unwinding the core wire or following the unwinding step. Terminal processing method for in-vehicle twisted pair cable. The terminal processing method for an in-vehicle twisted pair cable according to claim 3 or 4, wherein the retouching step is performed in synchronization with the orientation adjusting step. The length adjustment process which adjusts the length of the said core electric wire which protrudes from the end of the said sheath to an appropriate length after the said sheath strip process and before the said terminal connection process. The terminal processing method of in-vehicle twisted pair cable according to one item. The terminal processing method of the in-vehicle twisted pair cable according to claim 6, wherein the length adjusting step is provided after the retouching step. The manufacturing method of the vehicle-mounted twisted pair cable with a terminal which connects the said terminal to the terminal of the said core electric wire processed with the terminal processing method of the vehicle-mounted twisted pair cable as described in any one of Claims 1-7. A sheath strip portion for removing the sheath from the end of the in-vehicle twisted pair cable with the sheath sheathed, and a core wire for removing the insulation coating from the end of the core wire by untwisting the core wire exposed by the removal of the sheath A terminal processing device for an in-vehicle twisted pair cable in which the covering strip portion is arranged in order from the upstream side,
A terminal processing apparatus for an in-vehicle twisted pair cable provided with a direction adjusting unit that adjusts the direction in the circumferential direction of the core wire to a direction suitable for terminal connection downstream from the sheath strip. The terminal processing apparatus for an in-vehicle twisted pair cable according to claim 9, further comprising a refurbishment unit for untwisting the core electric wire that has been untwisted from the unwinding unit for untwisting the core electric wire. The terminal processing apparatus of the in-vehicle twisted pair cable according to claim 9 or 10, wherein the orientation adjusting unit has a function of correcting twisting of the core electric wire that has been untwisted. The length adjustment part which adjusts the length of the said core electric wire which protrudes from the end of the said sheath to an appropriate length in the back | latter stage from the said sheath strip part is provided. In-vehicle twisted pair cable terminal processing equipment. The terminal processing apparatus for an in-vehicle twisted pair cable according to claim 12, wherein the length adjusting unit is provided at a stage subsequent to the retouching unit. The terminal connection part which connects a terminal to the terminal of the said core electric wire was provided in the back | latter stage from the said core wire coating | coated strip part in the terminal processing apparatus of the vehicle-mounted twisted pair cable as described in any one of Claims 9-13. Manufacturing equipment for in-vehicle twisted pair cables with terminals.

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