JP5525302B2 - Terminal hammer - Google Patents

Description

  The present invention relates to a terminal hitting machine. In particular, the present invention relates to a technique for cutting an end portion of an electric wire used in a terminal hammer.

  A terminal hitting machine is well known as a wire processing device. In this terminal hitting machine, for example, a series of electric wire processes such as electric wire cutting, electric wire cutting, electric wire covering material peeling, and metal fitting (terminal) crimping to the core material at the end of the electric wire are continuously performed. (For example, refer to Patent Document 1).

  By the way, in a series of wire processing performed by a terminal hammer, it is convenient that a defective wire can be easily identified in a subsequent process when any processing failure occurs at the end of the wire.

  For example, when a terminal crimping failure to an electric wire is detected, a technique has already been proposed that can easily distinguish between a defective wire and a non-defective wire by cutting the end of such a defective wire with a cutting cutter. (For example, refer to Patent Document 2).

JP-A-11-204229 JP 2000-123654 A

  However, Patent Document 2 has a problem that no cutting error is assumed in the end cutting of a defective electric wire. For example, there may be a case where an error in cutting the end of the electric wire occurs due to factors on the side of the cutting cutter such as wear of the cutting blade and factors on the side of the electric wire such as bending of the end of the electric wire. In this state, if a defective wire and a non-defective wire are mixed, it is extremely difficult to identify the defective wire in a subsequent process. Therefore, it is considered that there is still room for improvement in conventional defective wire identification.

  This invention is made in view of such a situation, and when the edge part process of an electric wire is bad, when the electric wire edge part is cut | disconnected, the terminal punching machine which can determine this cutting | disconnection state appropriately is provided. The purpose is to do.

In order to solve the above-mentioned problems, the present invention provides a terminal that exposes the core material of the electric wire by removing the covering material at the end portion of the electric wire and crimps the terminal that is electrically connected to the core material to the end portion of the electric wire. In the hitting machine,
A processing device that performs a cutting process with a blade on the electric wire,
A controller, and
The controller determines the quality of the processing of the end portion based on a signal indicating the processing state of the end portion, and when the processing is defective, performs cutting of the end portion using the processing device, Provided is a terminal hitting machine for determining whether or not the end portion is cut by the processing device based on a signal indicating a cutting state of the end portion.

  With the above configuration, in the terminal hitting machine of the present invention, when the end of the electric wire is cut, the cutting state can be appropriately determined, so that there is no possibility that a defective product in which a cutting error has occurred is mixed with a non-defective product. Therefore, in the post-process, it becomes easy to identify defective products, and the problem of outflow of defective products can be solved appropriately.

  Moreover, in the terminal hitting machine of this invention, you may provide the sensor which monitors the removal state of the coating | covering material of the said edge part. And the said sensor may output the signal which shows the cutting state of the said edge part to the said controller.

  With the above configuration, in the terminal punching machine of the present invention, it is not necessary to install a dedicated cutting state instruction sensor, and the cost of the terminal hammering machine can be suppressed.

  Moreover, in the terminal hitting machine of this invention, the removal state of the coating | coated material of the said edge part may be sufficient as the process state of the said edge part.

  Moreover, the terminal hitting machine of this invention may be equipped with the sensor which monitors the crimping | compression-bonding state of the said terminal to the edge part of the said electric wire. And the processing state of the said edge part may be the crimping | compression-bonding state of the said terminal to the said edge part.

  Moreover, the terminal hitting machine of this invention may be equipped with the sensor which monitors the mounting state of the waterproof seal to the edge part of the said electric wire. And the processing state of the said edge part may be the mounting state of the said waterproof seal to the said edge part.

  According to the present invention, in a case where the end processing of the electric wire is defective, a terminal hitting machine that can appropriately determine the cutting state when the end of the electric wire is cut is obtained.

It is the layout figure which showed typically an example of the terminal hitting machine of embodiment of this invention. It is the figure which showed typically an example of the electric wire machining process of the terminal hammer of FIG. It is the figure which showed an example of the cutting | disconnection of the electric wire edge part by the defective cutting cutter of FIG. It is the flowchart which showed an example of the wire processing flow by the terminal hitting machine of embodiment of this invention. It is the figure which showed an example of the detection operation | movement of the strip sensor used for the quality determination of the cutting | disconnection of an electric wire edge part.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  Throughout the drawings, the same or corresponding components are denoted by the same reference numerals, and redundant description of such components may be omitted hereinafter.

  Further, the present invention is not limited to the following embodiment. That is, the following specific description merely illustrates the characteristics of the “terminal hitting machine” of the present invention. Therefore, when the following specific examples are described with appropriate reference numerals attached to the terms corresponding to the components that specify the “terminal hitting machine” of the present invention, the specific device corresponds to the present invention. It is an example of the component of "terminal hammer". For example, the following “defective cutting cutter 17” is an example of the “processing device that performs cutting with a blade on an electric wire” of the present invention. As another example of such a processing device, for example, a “cutter unit 16” may be used.

(Embodiment)
FIG. 1 is a layout diagram schematically showing an example of a terminal hitting machine according to an embodiment of the present invention. FIG. 2 is a diagram schematically showing an example of an electric wire machining process of the terminal hammer of FIG.

  As shown in FIG. 1, various devices (described later) capable of continuously processing both ends of the electric wire 20 (for example, an automobile harness electric wire) are arranged on the base 100 </ b> A.

  For convenience of illustration in FIG. 1 and the following description, the winding roll (not shown) side of the electric wire 20 is a “front” stage, and the tip side of the electric wire 20 is a “rear” stage. Each of the devices used for the processing of the former electric wire 20 is given “F” as a reference number, and each of the devices used for the processing of the latter electric wire 20 is given “R” as a reference number. Yes.

  First, an outline of the electric wire supply mechanism of the terminal hammer 100 will be described.

  As shown in FIG. 1, the terminal hammer 100 includes a wire drawing machine 10, a length measuring unit 11, and a controller 30.

  The wire drawing machine 10 is composed of a plurality of (in this case, five) combing rolls 10A, and the curling of the electric wires 20 wound in a bundle is corrected using these combing rolls 10A.

  The length measuring unit 11 is arranged on the rear side of the wire drawing machine 10 and measures the feed length of the electric wire 20 while pulling the electric wire 20 backward. Thereby, the electric wire 20 is sent to the cutter unit 16 (described later) through the nozzle 12.

  As shown in FIG. 1, in the length measuring unit 11 of the present embodiment, a belt system capable of sandwiching the electric wire 20 in a wide range is adopted as a feeding mechanism of the electric wire 20. Moreover, in this length measurement unit 11, the feed length of the electric wire 20 is measured using an encoder (not shown). Then, by feeding back this feed length to the controller 30, a length measuring servo motor (not shown) for driving the belt of the length measuring unit 11 can be feedback controlled. Thereby, cutting length L1 (after-mentioned) of the electric wire 20 is controlled appropriately.

  The controller 30 includes, for example, a processor including a CPU, a memory, and the like, and controls operations of various control target devices of the terminal hammer 100 based on signals from various sensors of the terminal hammer 100. The controller 30 may be single or plural.

  Next, an outline of the electric wire machining mechanism of the terminal hammer 100 will be described.

  As shown in FIG. 1, the terminal hammer 100 is a product that temporarily stores a cutter unit 16, a pair of strip sensors 15F and 15R, a pair of crimping machines 14F and 14R, and an electric wire 20 after completion of wire processing. A tray 18.

  The cutter unit 16 cuts the electric wire 20 (see the cutting step 200 in FIG. 2A) and peels off the covering material 21 from the ends 20F and 20R of the electric wire 20 (the covering material peeling step 201 in FIG. 2B). Used). Therefore, the cutter unit 16 is disposed in the vicinity of the nozzle 12 and a pair of wire cutting blades 16C that can cut the electric wires 20 and a pair of wires that are disposed on both sides of the electric wire cutting blades 16C and can strip off the covering material 21 of the electric wires 20. Stripping blades 16F and 16R are provided.

  Specifically, in the cutting step 200, as shown in FIG. 1 and FIG. 2A, the electric wire 20 is sent backward from the electric wire cutting blade 16C by the cutting length L1 by the length measuring unit 11, and the electric wire cutting blade 16C. The portions of the electric wire 20 located on both sides of the wire are clamped by the pair of clamp portions 13F and 13R. In this state, the electric wire 20 is cut by the electric wire cutting blade 16 </ b> C of the cutter unit 16. As a result, as shown in FIG. 1, the terminal 25 is crimped to one end portion (end portion 20R) in the preceding (one time before) wire processing step, and the end portion 20F has the cut length L1. The electric wire 20 which is not subjected to electric wire processing and extends continuously from the winding roll can be formed.

  Further, in the covering material stripping step 201, as shown in FIG. 1 and FIG. 2B, the end portions 20F and 20R of the electric wires 20 are clamped by the clamp portions 13F and 13R, respectively. Are respectively sandwiched between the stripping blades 16F and 16R, and the electric wire 20 is pulled in the direction of the arrow (see FIG. 2B). Then, the insulating covering materials 21 at the end portions 20F and 20R are simultaneously removed (stripped), and as a result, the conductive core materials 22 at the end portions 20F and 20R are simultaneously exposed.

  Further, the strip sensors 15F and 15R are used for determining whether the end portions 20F and 20R of the electric wires 20 are peeled off or not (refer to the covering material peeling pass / fail judgment step 202 in FIG. 2C). This is an optical sensor comprising a unit 23 and a light receiving unit 24.

  In detail, in the quality judgment step 202 for stripping off the covering material, as shown in FIGS. The ends 20F and 20R of the electric wire 20 are allowed to pass through. Then, the projection light of the strip sensors 15F and 15R is blocked. Since the projected light blocking area corresponds to the diameters of the ends 20F and 20R (core material 22) of the electric wire 20, the strip sensor 15F and 15R detects the stripping state of the covering material based on the data of the light blocking area. Therefore, the strip sensors 15F and 15R can monitor the stripped state of the covering material 21 at the end portions 20F and 20R. The strip sensors 15F and 15R are not limited to the above optical sensors. For example, the strip sensor may be an image processing sensor that can monitor the stripped state of the covering material 21 using the image of the covering material 21 at the end portions 20F and 20R.

  Further, the crimping machines 14F and 14R are used for crimping the terminal 25 to the ends 20F and 20R of the electric wire 20 and determining whether or not the terminal crimping is good (see the terminal crimping / good / bad judgment process 203 in FIG. 2).

Specifically, in the terminal crimping / quality determining step 203, as shown in FIG. 1 and FIG. 2 (d) , the ends 20F and 20R of the electric wire 20 are simultaneously mounted on the press sections of the crimping machines 14F and 14R, respectively. Thereby, each of the terminal 25 electrically connected with the core material 22 of the end portions 20F and 20R of the electric wire 20 is simultaneously crimped to the end portions 20F and 20R.

  At this time, the crimping load of the terminal 25 is detected by a load sensor (for example, load cell; not shown) in the crimping machines 14F and 14R, and the crimping state of the terminal 25 to the end portions 20F and 20R is the load applied to the load cell. It is detected as a change with time. Therefore, these load cells can monitor the crimping state of the terminal 25 to the end portions 20F and 20R.

  In this way, a series of electric wire processing by the terminal hammer 100 is performed, and the electric wire 20 (hereinafter, may be abbreviated as “non-defective product 20G”) in which both ends 20R are appropriately processed is a product. Carried to tray 18. Further, the electric wire 20 that has been subjected to electric wire processing only at one end portion 20F is subjected to electric wire processing at the other end portion in a subsequent (next) electric wire processing step.

  Next, an outline of a processing mechanism when a wire processing defect occurs in the terminal hammer 100 will be described.

  As shown in FIG. 1, the terminal hammer 100 includes a defective cutting cutter 17 (a processing device that performs cutting with a blade on the electric wire 20), and an electric wire 20 with a defective electric wire processing (hereinafter “defective product 20 </ b> B”). And a defective product tray 19 for temporarily storing (which may be omitted).

  In addition, although the terminal crimping defect in the case of crimping | bonding the terminal 25 to the edge part 20R of the electric wire 20 of the back | latter stage side is illustrated here, it is not restricted to this. Another example will be described in Modification 1 described later.

  As shown in FIGS. 1 and 3, the defective cutting cutter 17 includes a pair of defective cutting blades 17S used for cutting the end 20R of the defective product 20B when a terminal crimping failure occurs at the end 20R of the electric wire 20. Prepare. As a result, the end 20R of the defective product 20B can be cut at the cutting position C. As a result, the terminal 25 can be separated from the defective product 20B, so that the defective product 20B can be easily identified visually in the subsequent process.

  By the way, the present inventor believes that the end 20R of the defective product 20B cannot always be cut by the defective cutting cutter 17. For example, the cutting failure of the end portion 20R may be caused by a factor on the defective cutting cutter 17 side such as a defective mounting of the defective cutting blade 17S or wear of the defective cutting blade 17S, or a factor on the defective product 20B side such as a curvature of the end portion 20R. It is thought that it may occur. In this case, if the defective product 20B in which the cutting error has occurred is mixed with the non-defective product 20G, it is extremely difficult to identify the defective product 20B in the subsequent process, and there is a possibility that the defective product 20B may flow out to the outside. .

  Therefore, in the case of such a terminal crimping failure of the end 20R of the electric wire 20, the terminal hammer 100 according to the present embodiment can appropriately determine the cutting state when the end 20R of the defective product 20B is cut. It is characterized by a built-in method.

  Therefore, hereinafter, the processing of wire processing by the terminal hammer 100 incorporating the above-described method will be described.

  FIG. 4 is a flowchart showing an example of a wire processing flow by the terminal hammer 100 according to the embodiment of the present invention.

  In addition, although the process flow in the case of crimping | bonding the terminal 25 to the edge part 20R of the electric wire 20 of the back | latter stage side is illustrated here, it is not restricted to this. A similar processing flow is performed in Modification 1 described later.

  Each processing flow shown in FIG. 4 is programmed in advance and stored in the memory of the controller 30. Further, based on a command from the CPU of the controller 30, the above program is read out to the CPU of the controller 30, and this program performs the following processing while controlling each part of the terminal hammer 100.

  First, the terminal 25 is crimped | bonded to the edge part 20R of the electric wire 20 of the back | latter stage using the crimping machine 14R (step S1).

  At this time, whether the terminal 25 is crimped to the end 20R of the electric wire 20 is also determined (step S2).

  When the crimping of the terminal 25 is determined to be “good” (in the case of “Yes” in step S2), the electric wire 20 (good product 20G) is discharged to the product tray 18 (step S3).

  On the other hand, when it is determined that the crimping of the terminal 25 is “defective” (in the case of “No” in step S2), the end 20R (terminal 25) of the electric wire 20 (defective product 20B) is defective as shown in FIG. It is cut by the defective cutting blade 17S of the cutting cutter 17 (step S4). The cutting of the electric wire 20 (defective product 20 </ b> B) determined as “defective” is not limited to the form of cutting with the defective cutting cutter 17. For example, the electric wire 20 (defective product 20B) may be cut using the electric wire cutting blade 16C and the stripping blades 16F and 16R of the cutter unit 16. Thereby, installation of the defective cutting cutter 17 becomes unnecessary, and the cost increase of the terminal hammer 100 can be suppressed.

  Next, whether or not the end 20R (terminal 25) of the electric wire 20 (defective product 20B) in step S4 is cut is determined using an appropriate cutting state instruction sensor (step S5).

  Here, in the terminal hitting machine 100 of this embodiment, as shown in FIG. 5, the above-described strip sensor 15R is also used as a cutting state instruction sensor. Thereby, in the terminal hammer 100, installation of a dedicated cutting state instruction sensor becomes unnecessary, and the cost increase of the terminal hammer 100 can be suppressed.

  Specifically, as shown in FIG. 5A, the cutting position C of the end 20R is a distance L2 (for example, L2 = from the optical axis of the strip sensor 15R (the positions of the light projecting unit 23 and the light receiving unit 24)). The end 20R of FIG. 5A is passed through the strip sensor 15R so as to be separated by 2 mm to 5 mm). Then, the end 20R does not cross the optical axis of the strip sensor 15R and does not block the projection light of the strip sensor 15R. Therefore, the strip sensor 15R does not output any detection signal to the controller 30. In this case, the end 20R (terminal 25) of the electric wire 20 (defective product 20B) is determined to be “good” (in the case of “Yes” in step S5), and the electric wire 20 (defective product 20B) is stored in the defective product tray. 19 (step S7).

  On the other hand, as shown in FIG. 5B, when a cutting error (partial cutting) of the end 20R occurs at the cutting position C due to factors such as wear of the defective cutting blade 17S or attachment failure of the defective cutting blade 17S. When the end portion 20R passes through the strip sensor 15R, the end portion 20R intersects the optical axis of the strip sensor 15R and blocks the projection light of the strip sensor 15R. Therefore, the strip sensor 15R can output the detection signal to the controller 30 in synchronization with the interruption of the projection light.

  Further, as shown in FIG. 5 (c), when a cutting error (blank cutting) of the end portion 20R occurs at the cutting position C due to factors such as bending of the end portion 20R, the end portion 20R is passed through the strip sensor 15R. Then, the end 20R intersects the optical axis of the strip sensor 15R and blocks the projection light of the strip sensor 15R. Therefore, the strip sensor 15R can output the detection signal to the controller 30 in synchronization with the interruption of the projection light.

  In the case of such two types of cutting mistakes, it is determined that the cutting of the end 20R (terminal 25) of the electric wire 20 (defective product 20B) is “defective” (in the case of “No” in step S5), and the operation screen (FIG. An error message about a defective product cutting error is displayed on the terminal punching machine 100, and the terminal hammer 100 automatically stops (step S6).

  As described above, the terminal hammer 100 according to the present embodiment removes (peels off) the covering material 21 of the end portions 20F and 20R of the electric wire 20, thereby exposing the core material 22 of the pair of electric wires 20 to the core. The terminal 25 that is electrically connected to the material 22 is configured to be crimped to the end portions 20F and 20R of the electric wire 20. Moreover, the controller 30 determines the quality of the terminal crimping of the end 20R based on a signal indicating the terminal crimping state of the end 20R of the electric wire 20. In this case, a signal indicating the terminal crimping state of the end portion 20R of the electric wire 20 is detected by the load cell in the crimping machine 14R, and this signal is output to the controller 30.

  And in the case of terminal crimping failure of the end 20R of the electric wire 20, the controller 30 cuts the end 20R of the electric wire 20 using the defective cutting cutter 17, and based on a signal indicating the cutting state of the end 20R. Whether or not the end 20R is cut by the defective cutting cutter 17 is determined.

  With the above configuration, in the terminal hammer 100 according to the present embodiment, when the end 20R of the defective product 20B is cut, the cutting state can be appropriately determined, so that the defective product 20B in which a cutting error has occurred is determined to be a non-defective product 20G. There is no possibility of mixing. Therefore, in the subsequent process, the defective product 20B can be easily identified, and the problem of the outflow of the defective product 20B can be solved appropriately.

  Further, the terminal hammer 100 according to the present embodiment includes a strip sensor 15R that monitors the stripped (removed) state of the covering material 21 on the end 20R of the electric wire 20. The strip sensor 15R outputs a signal indicating the cutting state of the end 20R to the controller 30.

  With the above configuration, it is not necessary to install a dedicated cutting state instruction sensor in the terminal hammer 100, and the cost increase of the terminal hammer 100 can be suppressed.

(Modification 1)
In the terminal hammer 100 according to the present embodiment, the terminal crimping state when the terminal 25 is crimped to the end 20R of the rear-stage side electric wire 20 is described as an example of the processing state of the end 20R of the electric wire 20.

  However, in the terminal hammer, not only the terminal crimping state of the end portion of the electric wire but also the quality of the end portion is determined based on the processing states of other various end portions.

  For example, as described above, the terminal hammer 100 includes the strip sensors 15F and 15R that monitor the stripped (removed) state of the covering material 21 of the ends 20F and 20R of the electric wire 20.

  Therefore, such strip sensors 15F and 15R output a signal indicating a covering material stripping state, which is an example of a processing state of the ends 20F and 20R of the electric wire 20, to the controller 30, and the controller 30 The end portions 20F and 20R using the defective cutting cutter 17 when the end portions 20F and 20R are unsatisfactory and the end portions 20F and 20R are unsatisfactory. Further, it may be determined whether or not the end portions 20F and 20R are cut.

  Further, in a terminal hammer, a tube-shaped rubber waterproof seal (not shown) may be attached to the end of the wire before the terminal is crimped to the end of the wire (for example, Japanese Patent Laid-Open No. 11-345668). reference). In this case, an appropriate sensor (not shown) monitors the mounting state of the waterproof seal on the end of the electric wire.

  Therefore, such a sensor outputs a signal indicating a mounting state of a waterproof seal, which is an example of a processing state of the end of the electric wire, to the controller 30, and the controller 30 performs a waterproof seal on the end of the electric wire based on this signal. You may perform the quality determination of mounting | wearing, and the quality determination of the cutting | disconnection of the electric wire edge part using the defective cutting cutter 17 and the cutting | disconnection of an electric wire end part in the case of the waterproof seal attachment defect of an electric wire edge part.

(Modification 2)
In the terminal hammer 100 according to the present embodiment, when the cutting of the end 20R (terminal 25) of the electric wire 20 (defective product 20B) is determined as “defective”, the terminal hammer 100 is automatically stopped.

  In the above case, since there is a high possibility of a machine trouble in the defective cutting cutter 17, from the viewpoint of improving preventive maintenance against the mixture of the defective product 20B and the non-defective product 20G, the operator cannot immediately release the stop of the terminal hammer 100. It is better to take these measures. For example, if the stop release is temporarily locked by measures such as setting a password for releasing the terminal hammer 100, the lock can be released after removal of the defective product 20B and completion of the maintenance work. Good.

(Modification 3)
In the terminal hitting machine 100 of the present embodiment, when it is determined that the end 20R (terminal 25) of the electric wire 20 (defective product 20B) is “bad”, an error message about a defective product cutting error is displayed on the operation screen. However, in addition to this display, the function of error history and fault diagnosis may be enhanced.

  For example, when a defective cutting error occurs, the error history information may be recorded in the memory of the operation unit such as the cutting error occurrence time, the content of the cutting error, and the lot number when the cutting error occurs. As a result, in the unlikely event that a defective product flows out to the outside, the tracking operation of the defective product and the cause investigation (failure diagnosis) of the failure can be quickly performed.

  According to the present invention, in a case where the end processing of the electric wire is defective, a terminal hitting machine that can appropriately determine the cutting state when the end of the electric wire is cut is obtained.

  Therefore, this invention can be utilized for the terminal punching machine which can process the electric wire for harnesses continuously, for example.

DESCRIPTION OF SYMBOLS 10 Wire drawing machine 10A Debris roll 11 Measuring unit 12 Nozzle 13F, 13R Clamp part 14F, 14R Crimping machine 15F, 15R Strip sensor 16 Cutter unit 16C Wire cutting blade 16F, 16R Stripping blade 17 Defective cutting cutter And processing machine that performs cutting with a blade)
17S defective cutting blade 18 product tray 19 defective product tray 20 electric wire 20F, 20R end of electric wire 20G non-defective product 20B defective product 21 coating material 22 core material 23 light projecting unit 24 light receiving unit 25 terminal 30 controller 100 terminal hitting machine 100A base

Claims (5)

In a terminal hitting machine that exposes the core material of the electric wire by removing the covering material at the end portion of the electric wire, and crimps a terminal that conducts with the core material to the end portion of the electric wire,
A processing device that performs a cutting process with a blade on the electric wire,
A controller, and
The controller determines the quality of the processing of the end portion based on a signal indicating the processing state of the end portion, and when the processing is defective, performs cutting of the end portion using the processing device, Based on a signal indicating the cutting state of the end portion, it is determined whether or not the end portion is cut by the processing device, and when it is determined that the end portion is cut, the electric wire is discharged to the tray, and the end portion A terminal hammer that stops the terminal hammer when it is determined that cutting is defective . A sensor for monitoring the removal state of the covering material at the end,
The terminal hitting machine according to claim 1, wherein the sensor outputs a signal indicating a cutting state of the end portion to the controller.   The terminal hitting machine according to claim 2, wherein the processing state of the end portion is a removal state of the covering material at the end portion. A sensor for monitoring the crimping state of the terminal to the end of the wire;
The terminal hitting machine according to claim 1 or 2, wherein the processing state of the end portion is a crimping state of the terminal to the end portion. A sensor for monitoring the mounting state of the waterproof seal on the end of the electric wire,
The terminal hitting machine according to claim 1 or 2, wherein the processing state of the end portion is a mounting state of the waterproof seal on the end portion.

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