JP2012204102A - Terminal crimping apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of failures by automatically performing, with a simple structure, total inspection of terminal crimping state.SOLUTION: A terminal crimping apparatus is provided with: a gripping device for gripping and moving an electrical wire 50; and a drive unit for driving the gripping device. By removing a coating material 52 at an end of the electrical wire 50, a core wire 51 of the electrical wire 50 is exposed, and a terminal 53 to be brought into conduction with the core wire 51 is crimped to the end of the electrical wire 50. With the crimped terminal 53 held by press members 21F and 21R (holding members), the electrical wire 50 is pulled for a predetermined distance under a predetermined load by the gripping device so that the crimping state of the terminal 53 is inspected by an inspection device based on changes occurring in the drive unit.

Description

  The present invention relates to a terminal crimping apparatus that crimps a terminal that exposes a core wire of an electric wire and conducts to the core wire to the end portion of the electric wire by removing a covering material at the end portion of the electric wire.

  Conventionally, a terminal crimped by this type of terminal crimping apparatus must not be pulled out with a specified force or less, so it is necessary to inspect whether it is crimped normally.

  Therefore, for example, the automatic evaluation apparatus for a terminal-attached electric wire disclosed in Patent Document 1 receives a test electric wire having one end crimped, and a crimp height measuring unit that measures the crimp height of the terminal fitting of the received test electric wire, the first automatic Inspection unit including a conveyance unit, a contact resistance measurement unit that measures the contact resistance value of the terminal fitting, a second automatic conveyance unit, and a fixing force measurement unit that measures the tensile strength of the terminal fitting, and an inspection result of this inspection unit And a data processing unit for storing and outputting for each test electric wire.

  Further, in the method for inspecting the crimping state of the crimping terminal disclosed in Patent Document 2, the crimping part illumination light with a predetermined hue is applied to the crimping part of the crimping terminal, and the background body of the hue different from the crimping part illumination light is applied to the background body of the crimping part. By illuminating illumination light, imaging the crimped part and the background body illuminated by the illumination light, image processing the imaged data, and detecting the position of the coated end of the wire in the crimped part To check for defects.

JP 2000-207956 A JP 2005-337926 A

  However, in the conventional terminal crimping device, it performs inspection at the time of initial setting and sampling inspection, and does not automatically inspect every number or fixed number during the production of product electric wires. Even if it is initially set to an appropriate value, defective products that occur cannot be found.

  On the other hand, manual inspection of all or a fixed number has a problem in time and accuracy.

  The present invention has been made in view of such points, and the object of the present invention is to automatically inspect the total number of terminals in a crimped state or a certain number automatically with a simple configuration during manufacture of a product electric wire. This is to prevent the occurrence of defective products.

  In order to achieve the above object, in the present invention, a tensile inspection of the crimp terminal is performed immediately after crimping.

Specifically, in the first invention,
By removing the covering material at the end of the electric wire, the terminal crimping device that crimps the terminal that exposes the core wire of the electric wire and conducts to the core wire to the end of the electric wire,
The terminal crimping device
A gripping device for gripping and moving the wire;
A driving device for driving the gripping device;
During the manufacture of the product electric wire, the crimped terminal is inspected from the change that occurs in the driving device by pulling the electric wire by a predetermined distance with the holding device while holding the terminal after the crimping with a holding member. An inspection device.

  According to the above configuration, after the terminal is crimped to the end of the electric wire during manufacture of the product electric wire, the terminal is held by the holding member, the tensile inspection is performed, and the change that occurs in the driving device that drives the gripping device Since the terminal is inspected for the crimping state, it can be inspected automatically instead of manually.

In the second invention, in the first invention,
The change that occurs in the drive device is a change in the torque of the drive device.

  According to said structure, when an electric wire is pulled with a holding | grip apparatus, a torque will rise gradually and the thing of a favorable crimped state will be kept constant, but a thing with a bad crimped state will start to move and a torque will fall. By detecting the torque change in this way, the crimped state is easily inspected.

In the third invention, in the first invention,
The drive device is a servo motor,
The change that occurs in the drive device is a change in the sensor of the servo motor.

  According to the above configuration, when the electric wire is pulled by the gripping device, the servo motor rotates at a constant speed at first, and when the electric wire is fully extended, the one with a good crimped state stops after the speed gradually decreases. In the case of a poorly crimped state, the electric wire starts moving and the speed increases again. As described above, the change in the rotation of the servo motor is detected by the position sensor such as an encoder, whereby the crimped state is easily inspected. The servo motor here is a general term for motors that can automatically control position, orientation, orientation, and the like.

In a fourth invention, in any one of the first to third inventions,
A change occurring in the driving device is measured by a displacement of the holding member.

  According to the above configuration, when the electric wire is pulled by the gripping device, a load is applied to the holding member, and the displacement increases little by little. As for the thing, the electric wire begins to move and the displacement is reduced without the load being transmitted. For this reason, by detecting the displacement of the holding member, the crimped state is easily inspected.

In a fifth invention, in any one of the first to third inventions,
A change occurring in the driving device is detected by a change in load applied to the holding member.

  According to the above configuration, when the electric wire is pulled with the gripping device, the load of the holding member increases little by little, and the constant load is maintained in the good crimped state, but the electric wire starts moving in the poorly crimped state. The load decreases. For this reason, by detecting the displacement of the holding member, the crimped state is easily inspected.

In a sixth invention, in any one of the first to fifth inventions,
The holding member is a press member that crimps the terminal. The press member is opened by a predetermined amount after the terminal is crimped, and the press member is placed around a wire barrel that is a crimping portion between the core wire and the terminal. The terminal is held by being hooked on the protruding bell mouth portion.

  According to the above configuration, the electric wire is inspected with the press member slightly opened and held to the extent that it is caught by the bell mouth portion around the wire barrel formed by the crimping immediately after the crimping, so it is necessary to move the electric wire. There is no need to provide a separate holding member. For this reason, a simple configuration is achieved, and the crimped state is easily inspected.

In a seventh invention, in any one of the first to fifth inventions,
The holding member is configured to be hooked on an insulation barrel that is a crimping portion between the terminal and the covering material to hold the terminal.

  According to said structure, since an electric wire is moved with a holding | grip apparatus immediately after crimping | compression-bonding and an insulation barrel part is hooked and a pull test | inspection is performed, a test | inspection is performed easily.

In an eighth invention, in any one of the first to fifth inventions,
The holding member is configured to hold the terminal on the tip side of the crimping portion of the terminal.

  According to said structure, since an electric wire is moved with a holding | gripping apparatus immediately after crimping | compression-bonding, for example, a terminal connection part is pinched | interposed with an upper side holding member and a lower side holding member, a tension test | inspection is performed, A test | inspection is performed easily.

In a ninth invention, in any one of the first to eighth inventions,
The predetermined distance is set to a length that prevents the terminal from coming out of the electric wire.

  According to the above configuration, even if the crimped state is bad and the terminal is loosened by pulling inspection, it will not be completely separated from the electric wire, so just place the defective electric wire in the defective item storage etc. and it will come off and roll somewhere. There is no need to remove the contact terminals, and the work can be done immediately because the work can be done immediately.

In a tenth invention, in any one of the first to ninth inventions,
A plurality of inspection items can be stored, and an inspection can be performed by any combination of at least one of the plurality of inspection items.

  According to the above configuration, for example, during the production of product electric wires, not only the process of performing a normal inspection of low load, but also the electric wire used as a product more than necessary by performing a high load limit inspection every predetermined number of times. In addition to being able to be used as a product without applying a load, it is possible to accurately grasp the margin with respect to the acceptable value by the limit inspection, and it is also possible to perform an operation of discarding the wire subjected to the limit inspection.

In an eleventh aspect, in the tenth aspect,
Among the above inspection items, in the inspection at the limit setting, record the peak value immediately before the tensile load decreases,
When the peak value is smaller than the reference value, an alarm is generated.

  According to the above configuration, it is possible to accurately grasp the margin with respect to the acceptable value by appropriately performing the inspection at the limit setting, and if the peak value exceeds the reference value, it is possible that there is a malfunction in the device. Thus, the device can be corrected.

In the twelfth invention, in the tenth or eleventh invention,
As parameters corresponding to each of the inspection items, the presence / absence of execution, the interval of the number of crimps to be inspected, the inspection type, the tensile force, and the tensile distance can be arbitrarily changed.

  According to said structure, since it can set not only to test | inspect all or every fixed number but to perform a limit test | inspection suitably with required intensity | strength, a test | inspection precision improves and a high quality electric wire is obtained.

  As described above, according to the present invention, during manufacture of a product electric wire, the electric wire is pulled by a predetermined load with a predetermined load with a holding device while the terminal after crimping is held by the holding member, and the holding device is driven. Since the crimping state of the terminal is inspected from the change that occurs in the driving device, it is possible to prevent the occurrence of defective products by automatically inspecting the total number of the terminal crimping state or every fixed number with a simple configuration. it can.

The press member of the terminal crimping apparatus of this embodiment shows a mode that a terminal is crimped, (a) is a front view, (b) is an Ib part enlarged view of (a), (c) is (a). It is Ic-Ic sectional view taken on the line. It is a top view which shows arrangement | positioning of the main part of a terminal crimping apparatus. It is a side view which shows arrangement | positioning of the main part of a terminal crimping apparatus. It is a block diagram which shows the control system of a servomotor. It is a block diagram which shows the control system of an image process. It is a flowchart which shows the test | inspection method of a crimping | compression-bonding state. It is a graph which shows the change of the speed of a servomotor and the motor torque at the time of a normal crimping | compression-bonding state. FIG. 8 is a view corresponding to FIG. 7 when there is a defective crimping state. A mode that an electric wire is hold | maintained with the holding bracket concerning the modification 1 is shown, (a) is a front view, (b) is a side view. FIG. 7 is a view corresponding to FIG. 6 according to Modification 1. FIG. 10 is a diagram corresponding to FIG. 9 according to Modification 2. It is a front view which shows the test | inspection state by the contact displacement meter concerning the modification 3. It is a front view which shows the test | inspection state by the non-contact displacement meter concerning the modification 3. It is a front view which shows the test | inspection state by the load cell concerning the modification 3. FIG. 7 is a view corresponding to FIG. 6 according to Modification 4. 10 is a table showing parameters corresponding to inspection items according to Modification 4.

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

  FIG. 2 shows a simplified layout of the terminal crimping apparatus 1 according to the embodiment of the present invention. FIG. 3 shows a front part (rear part) of the terminal crimping apparatus 1. The terminal crimping apparatus 1 includes a base 2 in which members such as steel plates are assembled, and various devices that continuously perform terminal processing at both ends of the electric wire 50 having a predetermined length are arranged on the base 2. As shown in FIG. 2, the winding roll (not shown) side around which the electric wire 50 is wound is a front stage, and the tip side of the electric wire 50 is a rear stage. Each of the devices used for the processing of the front-stage electric wire 50 is denoted by “F”, and each of the devices used for the processing of the subsequent-stage electric wire 50 is denoted by “R”. Yes. As shown in FIG.1 (c), the electric wire 50 consists of what covered the core wire 51 comprised, for example with conductors, such as a copper wire, with the coating | covering material 52 which consists of an insulator.

  The terminal crimping apparatus 1 has an electric wire supply mechanism 3, and the electric wire supply mechanism 3 includes a wire drawing machine and a length measuring unit (not shown). By this, the winding wrinkle at the time of winding with a winding roll with a wire drawing machine is correct | amended, and it is comprised so that the length of an electric wire may be measured with a length measurement unit.

  The terminal crimping device 1 includes a control device 4 configured by a processor including a CPU, a memory, and the like. The control device 4 performs various control targets of the terminal crimping device 1 based on signals from various sensors of the terminal crimping device 1. It controls the operation of the equipment. The control device 4 may be singular or plural, and the installation location is not limited.

  A cutter unit 5 is disposed on the base 2. The cutter unit 5 is used for cutting the electric wire 50 and stripping the covering material 52 of the end portions 50F and 50R of the electric wire 50. The cutter unit 5 is arranged in the vicinity of the nozzle 6 from which the electric wire 50 is drawn out, and the electric wire cutting blade 5C arranged perpendicular to the supply direction of the electric wire 50 for cutting the electric wire 50, and both sides of the electric wire cutting blade 5C. Are provided with a pair of stripping blades 5F and 5R which are disposed to be inclined with respect to the wire cutting blade 5C and strip off the covering material 52 of the wire 50.

  On the base 2, a pair of gripping devices 10F and 10R for gripping and moving the electric wire 50 are provided. As shown in FIG. 3, the gripping devices 10F and 10R include hands 11F and 11R that grip the electric wire 50, and the hands 11F and 11R are configured to be driven by servo motors 12F and 12R as driving devices. . As shown in FIG. 4, the motor driver 13 is configured to control the servo motors 12 </ b> F and 12 </ b> R in response to an instruction from the control device 4, and the control device 4 is in a state of the servo motors 12 </ b> F and 12 </ b> R from the motor driver 13. Is obtained from information such as current and encoder.

  Further, a pair of crimping machines 20F and 20R are provided on the base 2. As shown in FIGS. 1 and 2, the crimping machines 20F and 20R include press members 21F and 21R, respectively, and the press members 21F and 21R are respectively provided with a pair of insulation side crimpers 22F and 22R and wire side crimpers. 23F, 23R, and a pair of insulation side anvils 24F, 24R and wire side anvils 25F, 25R. As shown in FIG. 3, the pair of insulation side crimpers 22F and 22R and the wire side crimpers 23F and 23R are configured to be moved up and down by pressure cylinders 26F and 26R, respectively. Then, after the terminals 53 sequentially sent in a chain form are placed on the pair of insulation-side anvils 24F, 24R and wire-side anvils 25F, 25R, the end portions 50F, 50R of the electric wire 50 are respectively connected to the terminals 53 By feeding the upper part and lowering the pressure cylinders 26F and 26R, the insulation barrel 54 is caulked to the wire covering material 52 and the wire barrel 55 is caulked to the core wire 51 as shown in FIG. . A raised bell mouth portion 56 is formed around the wire barrel 55. The crimping force at this time is detected by a load sensor such as a load cell (not shown) provided in the crimping machines 20F and 20R. A connecting portion 57 at the tip of the terminal 53 is formed to be larger than the outer diameter of the wire barrel 55 or the insulation barrel 54 and is connected to an electric device.

  The crimping machines 20F and 20R include an inspection device 60 that inspects the crimped state of the terminal 53. The inspection device 60 inspects the crimped state from the changes that occur in the servo motors 12F, 12R by pulling the electric wire 50 by a predetermined load with a predetermined load with the gripping devices 10F, 10R while holding the terminal 53 after crimping with a holding member. Is configured to do. In the present embodiment, the press members 21F and 21R serve as holding members.

  Although details will be described later, the change that occurs in the servo motors 12F and 12R is a change in the torque (tensile force) of the servo motors 12F and 12R, and this change can also be detected as a change in the rotation of the servo motor.

  Further, in order to examine the shape change after the tensile inspection in addition to the changes generated in the servo motors 12F and 12R, as shown in FIG. 5, the camera 30 is provided in the inspection areas 61F and 61R (shown in FIG. 2) as an inspection apparatus. The image processing device 31 compares the image captured by the camera 30 and the image stored in the normal crimped state in advance, and when there is an unacceptable difference between them, an abnormality is found in the control device 4. You may make it send the signal to that effect.

-Crimping of terminals and inspection method of the crimped state-
Next, a method for inspecting the crimped state of the terminal 53 will be described with reference to the drawings. The control device 4 is programmed in advance with the wire processing, and the control device 4 controls the terminal crimping device 1 as follows.

  As shown in FIG. 6, the crimping | compression-bonding process of the terminal 53 of the electric wire 50 is first performed by step S10. Specifically, first, the electric wire 50 corresponding to the cutting length is fed out from the electric wire cutting blade 5C by the length measuring unit of the electric wire supply mechanism 3, and is gripped by the gripping device 10R. In this state, the electric wire 50 is cut by the electric wire cutting blade C. Thereby, the electric wire 50 by which the terminal 53 was crimped | bonded by crimping | bonding to the one end part 50R in the electric wire processing process of 1 time before, and the electric wire 50 continuously extended from the winding roll in which the electric wire process was not given to the end part 50F, Form.

  Next, the covering material 52 of the end portions 50F and 50R of the electric wire 50 is removed by the stripping blades 5F and 5R while the pair of electric wires 50 are held by the holding devices 10F and 10R. Line 51 is exposed.

  Next, a terminal 53 that conducts to the core wire 51 is crimped to the end portions 50 </ b> F and 50 </ b> R of the electric wire 50. Specifically, as shown in FIG. 3, both end portions 50F and 50R are respectively attached to the press members 21F and 21R of the crimping machines 20F and 20R, and the pressure cylinders 26F and 26R are lowered as described above. Thus, the insulation barrel 54 and the wire barrel 55 are pressure-bonded to form the bell mouth portion 56.

  Next, in step S101, it is determined whether or not a tensile inspection is performed by holding the crimped terminal 53 with a holding member. This determination may be set so that inspections are performed at intervals (for example, after a certain number of times of crimping is performed) as in Modification 4 described later, or set to be performed every time crimping is performed. Thus, it is determined whether the number of times of crimping is the set number. When the inspection is not performed, the process jumps to step S14. When the inspection is performed, the process proceeds to step S11.

  In step S11, as shown in FIG. 1, the pressing members 21F and 21R serving as holding members are pressed by a predetermined amount after the terminal 53 is pressed (the bell mouth portion 56 is not applied with a load in a direction to be sandwiched between the wire barrels 55). The press members 21F and 21R are retracted only by a degree not exceeding), and the terminals 53 are held by being hooked on the bell mouth portion 56.

  Next, in step S12, inspection is started. Specifically, the servo motors 12F and 12R that drive the gripping devices 10F and 10R are driven, and the electric wires 50 are pulled in the directions of the arrows in FIG. 1A to monitor changes that occur in the servo motors 12F and 12R. Various monitoring methods can be considered. In the present embodiment, changes in torque and speed of the servo motors 12F and 12R are detected. Only one of the torque and speed may be detected. As shown in FIG. 4, the control device 4 detects changes in the current generated in the motor driver 13 and the pulse of the encoder. Thereby, in step S13, it is determined whether it is a non-defective product according to the crimping state of the terminal 53.

  Specifically, as illustrated in FIG. 7, when the time axis is taken on the horizontal axis and the speed and torque are taken on the vertical axis (both are units for reference data), when the terminal 53 is in a good crimping state, It changes as follows.

  At times 0 to 1, the servo motors 12F and 12R rotate, and the speed reaches the preset upper limit value. The electric wire 50 is still loose.

  In time 1-5, it becomes a uniform motion at the upper limit speed. Although the motor torque is ideally 0, in the actual terminal crimping apparatus 1, a loss such as friction occurs, so that a constant torque is required as shown in FIG.

  At time 5-9, since the electric wire 50 begins to be stretched, the motor torque rises to the set value. At the same time, the speed drops to substantially zero.

  In time 9-20, it stops with the force balanced.

  When the speed and torque of the servo motors 12F and 12R change in this way, the control device 4 determines that both of the crimped states of the terminals 53 are good, and proceeds to step S14 to perform normal processing and later as a good product. Flowed into the process.

  On the other hand, when the crimping state of the terminal 53 is defective, the speed and torque change as follows.

  That is, as shown in FIG. 8, the same change as in the normal case shown in FIG.

  At time 5 to 9, since the electric wire 50 starts to be tensioned, the motor torque rises to the set value, but at time 7, the terminal 53 starts to come off, and then the speed that has started to fall again rises back to the upper speed limit. Will fall again.

  From time 9 to 20, the electric wire 50 continues to move at the set speed with the terminal 53 disconnected.

  When the speed and torque of the servo motors 12F and 12R change as described above, the control device 4 identifies the defective electric wire 50 based on the detection result of the servo motors 12F and 12R that have any abnormality. That is, the control device 4 is a defective product when there is a place where the speed does not become zero within a predetermined time or continues to move, or the speed at which the speed starts to decrease increases again and the negative acceleration turns to positive. Judge. Further, the control device 4 determines that the product is defective when the torque that has started to increase to some extent decreases again.

  Next, the process proceeds to step S15 and an alarm is issued. In addition, when the electric wire 50 continues to move at the set speed, the terminal 53 is set to proceed to step S15 where the terminal 53 does not come out of the electric wire 50.

  Subsequently, it progresses to step S16, a defective article is moved to a defective storage place, and it returns to the start and a work is started. At this time, by adjusting the timing of proceeding to step S15, even if the crimping state is poor and the terminal 53 is loosened by the tensile inspection, it does not completely separate from the electric wire 50, so there is no need to search for the disconnected terminal 53, Since the defective electric wire 50 can be immediately moved to the next crimping operation of the electric wire 50 just by placing it in the defective product storage place, the work efficiency is good. In addition, what is necessary is just to stop an alarm suitably after an operator confirms the defective article of a defective storage place.

  As described above, since the tensile inspection is performed in a state where the press members 21F and 21R are slightly opened and held so as to be caught by the bell mouth portion 56 around the wire barrel 55 formed by the crimping immediately after the crimping, the electric wire 50 is moved. There is no need to provide a separate holding member. For this reason, a simple configuration is achieved, and the crimped state is easily inspected.

  In step S12, the above-described tensile inspection may be performed, but the image processing shown in FIG. 5 may be added as an inspection item. In this case, the electric wire 50 after crimping is moved to the inspection areas 61F and 61R and photographed by the camera 30, and an image captured by the camera 30 and a normal crimped image stored in advance are image processing apparatuses. When there is an unacceptable difference between them, a signal indicating that an abnormality has been found is sent to the control device 4. At this time, the process may proceed to step S15.

  Therefore, according to the terminal crimping apparatus 1 according to the present embodiment, the electric wire 50 is gripped by pulling a predetermined distance with a predetermined load by the gripping devices 10F and 10R in a state where the terminal 53 after the crimping is held by the press members 21F and 21R. Since the crimping state of the terminal 53 is inspected from the changes that occur in the servo motors 12F, 12R that drive the devices 10F, 10R, the entire terminal crimping state is automatically inspected with a simple configuration, not manually. Occurrence of malfunctions can be prevented.

-Modification 1-
FIG. 9 shows a first modification of the embodiment of the present invention. In the first modification, the configuration of the holding member is different from that of the above embodiment. In addition, in each following modification, the same code | symbol is attached | subjected about the same part as FIGS. 1-8, and the detailed description is abbreviate | omitted.

  In the present modification, the holding member includes holding brackets 62F and 62R arranged in the inspection areas 61F and 61R. The holding brackets 62F and 62R have slits 63F and 63R having a width slightly larger than the outer diameter of the covering material 52 of the electric wire 50 and smaller than the outer diameter of the insulation barrel 54 of the terminal 53.

  That is, in this modified example, as shown in FIG. 10, the same process as in FIG. 6 is followed, but step S11 is newly replaced with step S21. That is, each electric wire 50 is moved by the hands 11F and 11R, the electric wire 50 portion in front of the insulation barrel 54 is inserted from above the slits 63F and 63R, and the terminal 53 is held by the holding brackets 62F and 62R. Has been.

  In this case, since the tensile inspection is performed in the inspection areas 61F and 61R and the press members 21F and 21R are not used, the number of steps of moving each electric wire to the inspection areas 61F and 61R is increased as compared with the above embodiment. However, there is a merit that the outer diameter of the portion to be held is larger than that in the case of being held by the bell mouth portion 56 and the holding is easy. It is also advantageous when it is desired to avoid damage to the press members 21F and 21R as much as possible. Even in this case, a tensile inspection may be performed as in the above embodiment.

-Modification 2-
FIG. 11 shows a second modification of the embodiment of the present invention. In the second modification, the configuration of the holding member is different from that of the above-described embodiment. That is, in this modification, the holding member is composed of the upper holding members 162F and 162R and the lower holding members 164F and 164R arranged in the inspection regions 61F and 61R, and operates so that both holding members approach and separate from each other. . The holding means is different from the first modification.

  In this case, the electric wires 50 are moved to the spaces 163F and 163R between the upper holding members 162F and 162R and the lower holding members 164F and 164R by the hands 11F and 11R, and the connection of the terminal 53 on the tip side with respect to the wire barrel 55 is performed. The upper holding members 162F and 162R and the lower holding members 164F and 164R operate so as to be close to each other by using a cylinder (not shown) as a drive source, grasping the tip side of the terminal crimping portion, The connection portion 57 is fixed with a load that does not deform.

  Also in this case, the number of steps of moving each electric wire 50 to the inspection regions 61F and 61R is increased as compared with the above embodiment, but the outer diameter of the connection portion 57 is larger than the case where the electric wire 50 is held by the bell mouth portion 56 and the holding is held. There is a merit that it is easy as well. Even in this case, a tensile inspection may be performed as in the above embodiment.

-Modification 3-
FIG. 12 shows a third modification of the embodiment of the present invention, which is different from the above-described embodiment in that a change occurring in the servo motors 12F and 12R is detected by a change in the load applied to the holding member. This is effective when the holding member is configured as in 1 or Modification 2.

  For example, in the configuration of the holding member of Modification 2, as shown in FIG. 12, the contact-type displacement meters 65F and 65R fixed to the displacement meter fixtures 64F and 64R are brought into contact with the holding brackets 162F and 162R. In this modification, contact displacement meters 65F and 65R are used, but non-contact displacement meters such as laser displacement meters 165F and 165R may be used as shown in FIG. Furthermore, load cells 265F and 265R may be provided at the base end portions of the holding brackets 162F and 162R to detect a load due to a bending moment applied to the base end portions.

  In any method, in a normal crimping state, the electric wire 50 is slackened at time 0 to 5 shown in FIG. 7, so that the displacement and the load are detected with almost zero. And a displacement and a load also change with a change of motor torque. That is, when the electric wire 50 is pulled by the gripping devices 10F and 10R, the displacement and load of the holding brackets 162F and 162R increase little by little, and after that, in a good crimped state, a constant displacement or load is maintained. In a bad state, the electric wire 50 starts to move, and the displacement or load change returns to almost zero. For this reason, by detecting the displacement or load change of the holding member, the crimped state is easily inspected.

  The inspection of the third modification may be additionally performed in addition to the inspection method of the first or second modification.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

-Modification 4-
15 and 16 show a fourth modification of the embodiment of the present invention, which is different from the above-described embodiment in that a plurality of inspection items are stored and the inspection is performed by arbitrarily combining them. .

  Specifically, as shown in FIG. 15, first, in step S20, a crimping process of the terminal 53 of the electric wire 50 is performed in the same manner as in the above embodiment.

  Next, in step S22, the presence / absence or type of inspection is determined based on the number of times of crimping. For example, in this modified example, as shown in FIG. 16, at least four or more inspection items are stored. For example, assume that inspection items 1, 2, and 4 are performed. Inspection item 1 is an inspection performed once every 10 times of crimping, and inspection item 2 is performed once every 100 times. The inspection item 3 is performed once every 200 times, but is not performed because execution is not selected here. The inspection item 4 is a destructive test that is performed once every 1000 times, and the inspection load exceeds a reference value of 180, which is a limit value of the load that is supposed to be inherent (required tensile strength of the terminal 53 to be set).

  Therefore, in this step S22, it is determined from the current number of times of crimping whether or not the number of times of crimping is specified in the inspection item, the inspection frequency, and the selected inspection item. In this example, determination is performed every 10 times for inspection item 1, every 100 times for inspection item 2, and every 1000 times for inspection item 4, and when the other number of times of crimping is not a multiple of 10, inspection is not performed. The process jumps to step S25 and normal processing is performed.

  When the number of times of crimping is a multiple of 100 and not a multiple of 1000, the inspection item 2 is performed. When it is a multiple of 1000, the inspection item 4 is preferentially performed.

  When the number of times of crimping is a multiple of 10 and not a multiple of 100, the process proceeds to step S23, and a normal inspection is performed as in the above embodiment. Here, the inspection load is 100 and the inspection distance is 2 mm. Next, step S24, step S25, or step S28 is performed as in the above embodiment. In this case, since the inspection load is smaller than the reference value of 180, the terminal 53 is not damaged and can be used as a product.

  On the other hand, the process proceeds to step S26 every 100 times. In step S26, when it is not a multiple of 1000, inspection item 2 is performed. In this inspection item 2, the limit inspection is performed with an inspection load 150 in which the inspection load is higher than the normal inspection (load 100). In this limit inspection, a load is gradually applied up to 150. For example, when the terminal 53 is destroyed at 140 before the load reaches 150 and the load decreases, 140 immediately before the load decreases is stored as a peak value. Since the magnitude of the inspection load is set as high as 150, the terminal 53 may be broken. On the other hand, when the number of times of crimping is a multiple of 1000, inspection item 4 is performed in preference to inspection item 2. In this inspection item 4, since the inspection load is 200 and exceeds the reference value of 180, it can be predicted that the terminal 53 is completely destroyed. Even in the inspection item 4, if the terminal 53 is broken before reaching the inspection load 200, the load decreases at that time, and the load immediately before that is stored as a peak value. For example, when the inspection load increases to 190 and then the terminal 53 is destroyed and the load decreases, the peak value is stored as 190.

  Next, in step S27, it is determined whether the peak value of the stored load is 180 or more which is a reference value. If it is 180 or more, it means that the terminal 53 has the necessary tensile strength and it is determined that it has been caulked without any problem, and the process proceeds to step S28. Since the terminal 53 is destroyed at a high rate in the limit inspection, it cannot be used as a product, and defect processing is performed as in the above embodiment.

  On the other hand, if the peak value is smaller than 180, it can be determined that the terminal 53 is not sufficiently crimped because the terminal 53 does not satisfy the required tensile strength. For this reason, since abnormality of the terminal crimping apparatus 1 is assumed, it progresses to step S29 and an apparatus failure alarm is performed. Thereby, the terminal crimping apparatus 1 is corrected. And it progresses to step S28 and a defect process is performed.

  When inspection item 3 is also performed, inspection item 3 may be executed with priority over inspection items 1 and 2 every 200 times in the determination of step S22.

  Furthermore, as another example, the setting of the inspection item 1 may be changed so that all inspections are performed, and parameters such as the inspection type, tensile force, and tensile distance can be arbitrarily set, including the interval of the number of crimps corresponding to each inspection item. The setting can be changed.

  Therefore, in this modified example, during the production of the product electric wire, not only the process of performing the inspection for every or a fixed number, but also performing the limit inspection every predetermined number of times, the electric wire 50 used as a product is loaded more than necessary. In addition, it is possible to use the product as a product without adding a mark, and it is possible to accurately grasp a margin with respect to the acceptable value by the limit inspection, and to perform an operation of discarding the electric wire 50 subjected to the limit inspection.

1 Terminal crimping device 4 Control device 10F, 10R Gripping device 12F, 12R Servo motor (drive device)
21F, 21R Press member (holding member)
50 Electric wire 50F, 50R End portion 51 Core wire 52 Coating material 53 Terminal 54 Insulation barrel 55 Wire barrel 56 Bell mouth portion 57 Connection portion 60 Inspection device 62F, 62R Holding bracket 64F, 64R Displacement gauge fixture 65F, 65R Contact type Displacement meter 162F, 162R Bracket for holding 165F, 165R Laser displacement meter 265F, 265R Load cell

Claims (12)

In a terminal crimping apparatus that crimps a terminal that exposes the core wire of the electric wire and conducts to the core wire to the end portion of the electric wire by removing the covering material at the end of the electric wire,
A gripping device for gripping and moving the wire;
A driving device for driving the gripping device;
During the manufacture of the product electric wire, the crimped terminal is inspected from the change that occurs in the driving device by pulling the electric wire by a predetermined distance with the holding device while holding the terminal after the crimping with a holding member. A terminal crimping device comprising: an inspection device that performs the inspection. In the terminal crimping apparatus according to claim 1,
The terminal crimping apparatus, wherein the change that occurs in the drive device is a change in torque of the drive device. In the terminal crimping apparatus according to claim 1,
The drive device is a servo motor,
The terminal crimping apparatus, wherein the change in the driving device is a change in a sensor of the servo motor. The terminal crimping apparatus according to any one of claims 1 to 3,
A terminal crimping device configured to measure a change occurring in the driving device by a displacement of the holding member. The terminal crimping apparatus according to any one of claims 1 to 3,
A terminal crimping device configured to detect a change occurring in the driving device by a change in a load applied to the holding member. In the terminal crimping apparatus according to any one of claims 1 to 5,
The holding member is a press member that crimps the terminal. The press member is opened by a predetermined amount after the terminal is crimped, and the press member is placed around a wire barrel that is a crimping portion between the core wire and the terminal. A terminal crimping apparatus, wherein the terminal is held by being hooked on a protruding bell mouth part. In the terminal crimping apparatus according to any one of claims 1 to 5,
The terminal crimping apparatus, wherein the holding member is configured to be hooked on an insulation barrel that is a crimping portion between the terminal and the covering material to hold the terminal. In the terminal crimping apparatus according to any one of claims 1 to 5,
The terminal crimping apparatus, wherein the holding member is configured to hold the terminal closer to the tip than the crimping portion of the terminal. In the terminal crimping device according to any one of claims 1 to 8,
The terminal crimping apparatus, wherein the predetermined distance is set to a length that prevents the terminal from coming out of the electric wire. In the terminal crimping device according to any one of claims 1 to 9,
A terminal crimping apparatus configured to be capable of storing a plurality of inspection items and configured to be inspectable by any combination of at least one of the plurality of inspection items. The terminal crimping apparatus according to claim 10,
Among the above inspection items, in the inspection at the limit setting, record the peak value immediately before the tensile load decreases,
A terminal crimping device configured to generate an alarm when the peak value is smaller than a reference value. The terminal crimping apparatus according to claim 10 or 11,
A terminal crimping apparatus, wherein the parameters corresponding to each of the inspection items can be arbitrarily changed in input of presence / absence, interval of the number of crimps to be inspected, inspection type, tensile force, and tensile distance.

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