JP5224725B2 - Crimping device with crimping inspection function - Google Patents

Description

  The present invention relates to an apparatus for connecting an electrical wiring material and a crimp terminal for electrical connection, and more particularly to a crimp apparatus having a crimp inspection function.

  Conventionally, various types of crimping tools have been used to connect electrical wiring members and crimp terminals for electrical connection (for example, Patent Documents 1-3).

    The crimping tools described in Patent Documents 1 and 2 are mechanisms that use a manual crimping tool similar to the configuration shown in FIG.

  Normally, the manual crimping tool shown in FIG. 1 has a structure in which the crimping terminal 4 for electrical connection placed between the fixed dies 2 and 3 is crimped by grasping the arm 1 to connect the electrical wiring material and the crimping terminal 4. Have.

  On the other hand, the invention described in Patent Document 1 has a structure in which a wire connected to an air cylinder is expanded and contracted to open and close an arm of a manual crimping tool in order to reduce the crimping operation. On the other hand, the invention described in Patent Document 2 is a mechanism in which a pinion and a gear are connected to an arm of a manual crimping tool and the gear is driven and rotated by a driving mechanism. Thus, the arm of the manual crimping tool is opened and closed using the drive mechanism as a power source.

  Here, the handle load of the crimping tool changes due to the use for many years, the size of the gap formed between the movable die 2 and the fixed die 3 changes, and the crimping force becomes worse. As a result, a connection failure between the crimp terminal and the electric wiring material may occur, which may affect the reliability.

Therefore, it is necessary to detect such a state early and adjust the crimping tool. Japanese Patent Application Laid-Open No. H10-228561 discloses determining a crimping failure by detecting the hydraulic pressure of a hydraulic crimping tool or the drive current of a motor.
Japanese Patent Laid-Open No. 2002-127035 JP-A-8-130080 JP 2003-136421 A

  With the mechanism of the crimping failure shown in Patent Document 3, the crimping height in the crimped state cannot be directly managed.

  Accordingly, an object of the present invention is to provide a crimping apparatus having a crimping inspection function capable of accurately measuring and managing the crimping height.

  A crimping apparatus having a crimping inspection function according to the present invention that achieves the above-described problem has a die portion including an air cylinder and a lower die and an upper die placed on the air cylinder. The die is provided so as to be pushed up against the upper die by the air cylinder, a sensor plate is fixed to the lower die, and a contact sensor is provided in parallel with the die. The contact-type sensor has a crimping performance tester that measures the position of the contact moved by contacting the tip of the contact with the sensor plate as a measurement value.

  As a further preferred embodiment, the position of the contact represents the height of the crimp terminal after crimping, and the crimping performance inspection machine, if the height of the crimp terminal after the crimp is within the tolerance range of the standard value. , It is characterized by displaying by lamp display and buzzer.

  Further, as a further aspect, a locator for positioning an electric wire connected to a crimp terminal is provided between the lower die and the upper die.

  Furthermore, as one aspect, the lower die and the upper die are installed in the die portion so as to be replaceable by pins.

  According to the present invention, it is possible to determine whether the performance of the crimping tool is acceptable or not only by checking the meter display and the presence / absence of the pass lamp without depending on the operator's sense.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 2 is a diagram showing an embodiment of a crimping apparatus according to the present invention. In FIG. 2, a crimping tool 10 and a crimping result inspection machine 20 are shown. FIG. 2 (1) shows a front view of the crimping tool 10 and a crimping result inspection machine 20 connected thereto. FIG. 2 (2) shows a side view of the crimping tool 10.

  In FIG. 2, the crimping tool 10 has an air cylinder 109, and has a die part on the upper part of the air cylinder 109 and a contact sensor part that is a part of the crimping result inspection machine 20.

  The die portion has a piston head 101 that is pushed upward by an air cylinder 109 via a base plate 103 as described with reference to FIG.

  A slide 104 is connected to the piston head 101 by a slide pin 108.

  The lower die 115 is attached by the lower die pin 117, and the upper die 114 is fixed by the upper die pin 116.

  The upper die 114 is attached by the upper die pin 116. The lower die 115 and the upper die 114 can be appropriately changed and attached by the lower die pin 117 and the upper die pin 116 according to the size of the crimp terminal used.

  The slide cover 106 prevents the slide 104 from tilting.

  The front surface of the die portion is covered with a front cover 105 for safety.

  In FIG. 2 (1), the air cylinder 109 has a double pressure chamber as an example. FIG. 3 is a schematic diagram of the internal structure of the air cylinder 109.

  3 (1) shows that the piston of the air cylinder 109 is at the lowermost side, FIG. 3 (2) shows that the piston of the cylinder 109 is at the uppermost side, and FIG. The state in the middle of being pushed down from the uppermost side is shown.

  In FIG. 3 (1), air sent from an air supply source (not shown) is branched by a connector 110 and supplied to the two chambers 109 a and 109 b through the nozzles 111 and 112. As a result, as shown in FIG. 3B, the piston rises and the piston head 101 is pushed up.

  In FIG. 3 (3), a pressing force is supplied by the air sent from the air hose 113 to the nozzle 113A, and the piston head 101 is returned to the position shown in FIG. 3 (1).

  Returning to FIG. 2, a mechanism for inspecting the crimping performance, which is a feature of the present invention, will be described.

  A sensor bracket 121 is fixed on the base plate 103, and a contact sensor 118 is attached to the upper portion of the collar 120 by a sensor bracket 119. The contact sensor 118 and the control box 204 are connected by a sensor cable 123.

  Due to the upward movement of the slider 104, the contact of the contact sensor 118 abuts against the sensor plate 122 fixed to the slider 104.

  FIG. 4 is a diagram showing a state of the crimping process. Fig. 4 (1) Before the crimp terminal is mounted, Fig. 4 (2) shows a state in which the crimp terminal and the electric wire are mounted. A continuous terminal can be used as the crimp terminal. FIG. 4 (3) shows a state in which the electric wire 311a is arranged on the crimp terminal and is crimped by the upper die and the lower die.

  5, 6 and 7 are enlarged views of the die portion corresponding to FIGS. 4 (1), (2) and (3), respectively.

  The crimping operation will be described with reference to FIGS. As shown in FIGS. 4A and 5, a locator 315 is provided between the lower die 310 and the upper die 312 for positioning the electric wire connected to the crimp terminal. Further, the lower die 115 has a cutting blade 314. At the time of crimping, as shown in FIGS. 4B and 6, the terminal pins 316 formed at predetermined intervals on the terminal connecting bar (hoop) 317 are positioned on the lower die 115. At the same time, the electric wire is positioned by the locator 315.

  Next, the slide 104 is raised by operating the air cylinder 109 as shown in FIG. 3, and the electric wire 311a is sandwiched between the terminal pins 316 by the lower die 115 as shown in FIGS. Thus, pressure is applied to the upper die 114 by pressure. At the same time, the crimping terminal and the electric wire in the crimped state are separated from the hoop 317 by the cutting blade 315 (see FIG. 481).

  FIG. 8 is a configuration example of an inspection machine for inspecting the crimping performance of the crimping tool. Further, FIGS. 9 and 10 are inspection processing flows using the inspection machine shown in FIG. 8 (part 1 and part 2). The operation of the inspection machine of FIG. 8 will be described with reference to FIGS.

  A power source 209 is supplied to the control box 200 through the DC adapter 210.

  When the power switch 206 is turned on (step S1), power is supplied to the DC amplifier unit 211 (step S2).

  Next, the learning crimp terminal and the electric wire are set (step S3: FIG. 4 (1)). An air foot valve (not shown) is turned on (step S4). As a result, as shown in FIG. 3, the piston rises, the lower die 115 rises, and a crimping operation is performed (step S5).

  At this time, the tip of the contact 118a of the sensor head 118 hits the sensor plate 122, and the contact 118 is pushed into the sensor head 118 in accordance with the size of the lower die 115 rising. Therefore, the sensor head 118 sends to the main circuit 220 of the amplifier unit 211 a change current corresponding to the magnitude of the contact 118a being pushed.

  The main circuit 220 displays a measured numerical value corresponding to the change current on the display unit 205 (step S6). Next, the reset switch 207 is turned on to set the displayed state (step S7). A reset signal is input to the main circuit 220 through the input circuit 222.

  Therefore, the amplifier unit 211 displays zero on the display unit 205 at all times by the main circuit 220. At the same time, the lamp 208 is turned on to operate the buzzer 212 (step S8).

  Next, the air foot valve is turned off (step S9), the lower die 115 is lowered, and the space between the lower die 115 and the upper die 114 is fully opened (step S10).

  The crimped electric wire for learning is removed (step S11), and the crimping height is measured with a micrometer or the like (step S12).

  In this measurement, if it is out of the standard value, the process returns to step S3, and another crimping terminal and an electric wire are installed and learning is repeated.

  If the value is within the standard value, the process proceeds to the flow of FIG. 10 and crimping for production is performed.

  That is, production crimp terminals and electric wires are set in the same manner as in step S3 (step S13).

  Next, the air foot valve is turned ON corresponding to steps S4, S5, S6 (step S14). As a result, as shown in FIG. 3, the piston rises, the lower die 115 rises, and a crimping operation is performed (step S15).

  At this time, the tip of the contact 118a of the sensor head 118 hits the sensor plate 122, and the contact 118 is pushed into the sensor head 118 in accordance with the size of the lower die 115 rising. Therefore, the sensor head 118 sends to the main circuit 220 of the amplifier unit 211 a change current corresponding to the magnitude of the contact 118a being pushed.

  The main circuit 220 measures the position of the contact 118a from the magnitude corresponding to the change current, and displays the measured numerical value on the display unit 205 (step S16).

  This measured value indicates the height of the crimp terminal after crimping, and if it is within ± 5/100 of the standard value, the LED lamp 208 of the control box 200 is lit in green and the buzzer 21 is turned on ( Step S17). As a result, the crimping result is determined to be a non-defective product, and a non-defective product process is performed (step S18).

  On the other hand, when the measured value is out of the tolerance, the LED lamp 208 is not lit and the buzzer is turned off (step S19).

  At this time, the electronic counter 221 counts the number of times the LED lamp 208 is not lit and the buzzer is turned off. Therefore, when it is the first defect and when the number of defects is less than or equal to the predetermined number of defects, the process returns to step S3 and the processes from step S3 are repeated.

  Further, when the count value of the electronic counter 221 is equal to or greater than the predetermined number (step S20, Yes), a repair-required process is performed as a defective crimping tool (step S21).

  As described above, the present invention is a crimping apparatus that performs crimping by raising the lower die with an air cylinder and press-contacting the crimp terminal and the electric wire to the upper die, and measures the crimped state to determine the standard. Non-defective products are judged by comparing with the values. Therefore, the use of the present invention enables correct management of the product.

  At the same time, the performance of the crimping tool can be judged by checking the meter display and checking whether the acceptance lamp is lit or not without relying on the operator's sense.

  Therefore, it is possible to increase the reliability of inspection without depending on the skilled person, to improve the reliability of the product and to reduce the cost, and to greatly contribute to the industry.

It is a figure which shows the example of a manual crimping tool. It is a figure which shows the example of embodiment of the crimping | compression-bonding apparatus according to this invention. 2 is a schematic view of an internal structure of an air cylinder 109. FIG. It is a figure which shows the state of a crimping | compression-bonding process. It is a figure which expands and shows a dice part corresponding to Drawing 4 (1). It is a figure which expands and shows a dice part corresponding to Drawing 4 (2). It is a figure which expands and shows a dice part corresponding to Drawing 3 (3). It is an example of composition of an inspection machine for inspecting crimping performance in a crimping tool. It is the inspection processing flow using the inspection machine shown in FIG. 8 (part 1). FIG. 9 is an inspection process flow using the inspection machine shown in FIG. 8 (part 2).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Crimping tool 20 Crimping performance tester 101 Piston head 102 Head 103 Base plate 104 Slide 105 Front cover 106 Slide cover 107 Head cover 108 Slide pin 109 Air cylinder 110 Connector 111, 112, 113A Nozzle 113 Air hose 114 Upper die 115 Lower die 118 Contact type sensor 118a Contact 122 Sensor plate

Claims (3)

An air cylinder,
A die portion having a lower die and an upper die placed on the air cylinder via a slider;
The lower die is provided so as to be pushed up against the upper die from the lower side through the slider that is raised by the pressure of the air cylinder, and a sensor plate is fixed to the slider.
In addition, a contact sensor in parallel with the die,
A crimping performance tester for measuring, as a measured value, the position of the contact moved by contacting the tip of the contact of the contact sensor to the sensor plate;
The crimping performance inspection machine is
The position of the contact is expressed as the height of the crimping terminal after crimping. If the height of the crimping terminal after crimping is within the tolerance range of the standard value, it is indicated by a lamp display and buzzer.
An electronic counter is provided to advance the count value when it is outside the tolerance range of the standard value.
When the count value of the electronic counter is a predetermined number or more, it can be determined that the crimping device is defective.
A crimping apparatus having a crimping inspection function. In claim 1,
A terminal pin formed at a predetermined interval on a terminal connecting bar (hoop) is positioned on the lower die, and further, a locator is provided between the lower die and the upper die to position an electric wire connected to the crimp terminal. A crimping apparatus having a crimping inspection function. In claim 1,
A crimping apparatus having a crimping inspection function, wherein the lower die and the upper die are installed in the die part so as to be replaceable by pins.

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