JP4360640B2 - Terminal crimping device - Google Patents

Description

  The present invention relates to a terminal crimping apparatus that can reliably detect a crimping failure of a terminal when crimping a terminal to a terminal of a covered electric wire (hereinafter referred to as an electric wire).

  When crimping a terminal to the end of an electric wire, the coating on the end of the electric wire is peeled off by a certain length, and a terminal having a predetermined shape and size is attached to the end and crimped. More specifically, as shown in FIG. 5 (a), the covering grip portion T1 of the terminal T is surely placed around the covering portion W1 of the electric wire W and leaving a slight distance from the covering portion W1. The conductor gripping portion T2 is crimped so as to securely grip the conductor (core wire) W2 over the entire circumference, and the terminal T is crimped to the end of the electric wire W.

  Such crimping of the terminal T to the electric wire W is automatically performed by a terminal crimping apparatus. At the time of crimping, a part of the conductor W2 protrudes from the conductor gripping portion T2 as shown in FIG. 5 (c), the covering grip portion T1 of the terminal T grips the conductor W2 (neck hanging), or the conductor gripping portion T2 as shown in FIG. 5 (d) is the covering portion. Various crimping defects may occur, such as grabbing W1 (resin bite).

  Conventionally, as a terminal crimping device capable of detecting such a crimping failure of the terminal T, as shown in FIG. 6, a mold receiving part (anvil) 3 provided on the base 2 of the casing 1, and a mold receiving part 3, pressing the terminal T placed on the terminal 3 and crimping the terminal T to the end of the electric wire W, a pressing part holder (shank) 5 holding the pressing part 4, and pressing And a drive part (toggle mechanism) 7 that is connected to the part holder 5 via a connection member (ram) 6 and moves the die pressing part holder 5 up and down. There is one provided with a pressure sensor (load sensor) 8 for measuring a pressure bonding force (refer to Patent Document 1).

  Further, as shown in FIGS. 7A and 7B, the mold receiving portion 3 provided on the base 2 of the casing 1 and the terminal T placed on the mold receiving portion 3 are pressed, and this is connected to the electric wire W. A pressing part 9 composed of a conductor gripping part pressing part 9a and a covering gripping part pressing part 9b, a pressing part holder 10 holding the pressing part 9, and a pressing part holder 10 And a drive part (not shown) for moving the stamping part holder 10 up and down, and a conductor gripping part stamping part 9a and a covering gripping part stamping part of the stamping part 9 9b is provided with a pressure sensor 8 for measuring a terminal crimping force (see Patent Document 2).

  Further, as shown in FIG. 8, the mold receiving part 11, the mold pressing part 12 that presses the terminal T placed on the mold receiving part 11, and crimps the terminal T to the terminal of the electric wire W, and the mold pressing part 12. And a die pressing portion holder 13 that is moved up and down by a drive portion (not shown), and a pressure sensor 8 that measures a terminal crimping force is provided in the die receiving portion 11 (see Patent Document 3). ).

  Further, as shown in FIG. 9, a pressure sensor 8 for measuring a terminal pressure-bonding force is provided on the base 2 of the casing 1, and the mold receiver is attached to the entire upper surface including the pressure sensor 8 of the base 2 via a mold receiver mounting plate 14. There is a terminal crimping device having a configuration in which the portion 3 is provided (see Patent Document 4).

JP-A-63-281373 JP-A-1-176955 JP-A-10-323800 JP 2000-180273 A

  However, in the case where the pressure sensor 8 for measuring the terminal crimping force is provided on the connecting member 6 as in the terminal crimping apparatus shown in FIG. 6, the connecting portion (joining portion) between the embossing part holder 5 and the connecting member 6. Because part of the terminal crimping force (= reaction force) is absorbed by the clearance (play) that exists in the terminal, it is difficult to accurately measure the terminal crimping force, and it is possible to reliably detect terminal crimping defects. There is a problem that can not be. In particular, when detecting a crimp failure of a core spill as shown in FIG. 5 (b), the pressure change is small if the number of conductors W2 protruding from the conductor gripping portion T2 is small. There is a risk of oversight.

  Moreover, in the case where the pressure sensor 8 for measuring the terminal crimping force is provided in the die pressing portion 9 as in the terminal crimping device shown in FIG. 7, it exists in the connecting portion between the die pressing portion holder 10 and the connecting member 6. Since there is no influence of clearance (play), there is an advantage that the terminal crimping force can be measured more accurately than that shown in FIG. However, the stamping part 9 is formed in a shape that matches the type, size, etc. of the terminal T, and the stamping part 9 is replaced each time the type, size, etc. of the terminal T changes. In addition, it is necessary to replace the pressure sensor 8 or to prepare a large number of pressure sensor-equipped stamping portions 9 in advance, which is expensive and increases the cost of the terminal crimping device.

  Further, in the case where the pressure sensor 8 for measuring the terminal crimping force is provided in the mold receiving part 11 as in the terminal crimping apparatus shown in FIG. 8, the terminal crimping force acts in a distributed manner on the entire mold receiving part 11. The pressure crimping force corresponding to the pressure receiving area of the pressure sensor 8 / the pressure receiving area of the mold receiving portion 11, which is a part of the pressure sensor 8, is applied to the pressure sensor 8. Therefore, like the apparatus of FIG. 6, it is difficult to accurately measure the terminal crimping force, and there is a problem that the terminal crimping failure cannot be reliably detected. In addition, when the type, size, etc. of the terminal T change, it may be necessary to replace the mold receiver 11, and in preparation for this, a large number of mold receivers 11 with pressure sensors are prepared in advance. This increases the cost of the apparatus.

  Further, as in the case of the terminal crimping apparatus shown in FIG. 9, in the case where the mold receiving part 3 is provided on the entire upper surface including the pressure sensor 8 of the base 2 via the mold receiving part mounting plate 14, it acts on the mold receiving part 3. Since the terminal crimping force is distributed over the entire surface of the base 2 by the mold receiving portion mounting plate 14, the terminal crimping force acting on the pressure sensor 8 is reduced, and the terminal crimping force is accurately measured in the same manner as in the apparatus of FIGS. There is a problem that it is difficult to reliably detect the crimping failure of the terminal T.

  The present invention was born in view of the above, when crimping a terminal, it is easy to accurately measure the terminal crimping force, can reliably detect the crimping failure of the terminal, the type of terminal, Providing a terminal crimping device that eliminates costs and reduces the cost of the device, since there is no need to prepare a large number of stamping and pressure receiving parts with pressure sensors in preparation for changes in size, etc. It is intended to do.

In order to achieve the above object, according to the first aspect of the present invention, a mold receiving portion provided on a base of a casing and a terminal placed on the mold receiving portion are pressed to make the wire In a terminal crimping apparatus having a die pressing part that crimps to a terminal and a pressure sensor that measures the terminal crimping force provided on the base, the terminal crimping force is transmitted to the pressure sensor between the mold receiving part and the pressure sensor. A pressing force transmitting member is interposed , a mold pressing portion holder that holds the mold pressing portion is supported by a base frame so as to be movable up and down, and a mold receiving portion holder that holds the mold receiving portion is attached to the bottom of the base frame or the base frame The pressure-receiving surface of the pressure-bonding force transmitting member is in contact with the lower surface of the mold-receiving portion, and the pressure-receiving surface of the pressure-bonding force-transmitting member is in contact with the bottom surface of the die-receiving portion. With an applicator to be fitted, The serial base, and characterized in that the lower surface of the crimping force transmission member is mounted so as to contact with the upper surface of the pressure sensor mounted on the groove provided opposite to below the crimping force transmitting member To do.

The invention described in claim 2 of the present invention, in the terminal crimping apparatus of claim 1, composed with the mold receiving portion covering the gripping portion die receiving unit and the conductor grip mold receiving portion, press the mold part is composed of a cover gripping portion for embossing portion and the conductor gripping portion for embossing unit, wherein the pressure sensor consists of a pressure sensor unit gripping covering the pressure sensor conductor grip, the crimping force transmitting member gripping conductor It consists of a part transmission member and a covering grip part transmission member.

  According to the terminal crimping apparatus of the first aspect of the present invention, since the crimping force transmitting member for transmitting the terminal crimping force to the pressure sensor is interposed between the mold receiver and the pressure sensor, the terminal crimper is mounted on the mold receiver. When pressing the placed terminal and crimping it to the end of the wire, the crimping force applied to the die receiving part from the die pressing part via the terminal is not absorbed or dispersed elsewhere, and the crimping force It is directly transmitted to the pressure sensor provided on the base via the transmission member. As a result, it becomes easy to accurately measure the terminal crimping force with the pressure sensor, and the crimping failure of the terminal can be reliably detected. In addition, when changing the type and size of the terminal and replacing the embossed part and the mold receiving part, it is not necessary to replace the pressure sensor or prepare a large number of embossed parts and mold receiving parts with pressure sensors in advance. Cost is low and the cost of the terminal crimping device can be reduced.

In addition, since the crimping force transmitting member is mounted on the applicator so that the pressure receiving surface and the pressure receiving surface are in contact with the mold pressing portion, the mold receiving portion, the terminal pressing device can be assembled and the mold pressing portion and the mold receiving portion can be replaced. It becomes easy and the workability of assembly and replacement can be improved.

According to the terminal crimping apparatus of the second aspect of the present invention, the mold receiving part is composed of the conductor grip part mold receiving part and the covering grip part mold receiving part, and the mold pressing part is the conductor gripping part mold pressing part and the covering. It consists of a pressing part for the grip part, the pressure sensor consists of a pressure sensor for the conductor grip part and a pressure sensor for the covering grip part, and the crimping force transmission member consists of the transmission member for the conductor grip part and the transmission member for the covering grip part. Therefore, the terminal crimping force can be measured separately for the conductor gripping portion and the covering gripping portion of the terminal. Therefore, it becomes easy to determine whether the terminal crimping failure is due to hanging or resin, and the terminal crimping failure can be detected more reliably.

  Next, the best mode for carrying out the present invention will be described in detail with reference to the drawings. 1 is a front view showing a first embodiment of a terminal crimping apparatus according to the present invention, FIG. 2 is a side view thereof, FIG. 3 shows an applicator used in the present embodiment, and FIG. Sectional front view, (b) is a partial sectional side view.

  As shown in FIGS. 1 and 2, the terminal crimping apparatus of this embodiment presses a mold receiving part (anvil) 24 provided on the base 22 of the casing 20 and a terminal T placed on the mold receiving part 24. A die pressing portion (crimper, punch) 26 that crimps this to the end of the electric wire W and a pressure sensor (load sensor) 28 that measures a terminal crimping force provided on the base 22 are provided. A crimping force transmitting member 30 that transmits a terminal crimping force to the pressure sensor 28 is interposed between the sensor 28 and the sensor 28.

  As shown in FIGS. 3A and 3B, the mold receiving part 24, the mold pressing part 26, and the pressure-bonding force transmission member 30 are assembled and attached to the applicator 32.

  That is, the embossing portion 26 is divided into, for example, a hard metal plate-shaped conductor gripping portion embossing portion 26a and a covering gripping portion embossing portion 26b, and a block-shaped embossing portion holder (shank). 34) is held by a presser plate 36 and a fixing bolt 38. The mold pressing portion holder 34 is supported on the base frame 40 of the applicator 32 by two pressing plates 42 and a fixing bolt 44 so as to be movable up and down.

  The mold receiving portion 24 is formed of, for example, a hard steel plate-like piece, and is held by a block-shaped mold receiving portion holder 46 with some play by a fixing bolt 48. When a terminal crimping force is applied to the receiving portion 24, the mold receiving portion 24 moves slightly downward in FIG. 3, so that the terminal crimping force is reliably transmitted to the crimping force transmitting member. The mold holder holder 46 is held at the rear by a fixing bolt 50 on the base frame 40 of the applicator 32, and at the front by a holding plate 52 and a fixing bolt 54 that attaches this to the base frame 40 via the mold receiver 24. .

  The crimping force transmission member 30 is formed in a columnar shape made of a material having rigidity such as a steel material and is detachably provided on the bottom of the base frame 40 with bolts. The pressure receiving surface (upper surface) of the crimping force transmitting member 30 abuts the lower surface of the mold receiving portion 24 in the circular hole 58 formed so as to face directly below (when the terminal crimping force starts to act). And a small gap is formed between the hole 58 and the inner surface of the hole 58. In addition, a diameter expansion protrusion (expansion protrusion step) 31 is formed on the head of the crimping force transmission member 30, and a diameter expansion groove (expansion recess step) 59 is formed above the hole 58. When the pressure-bonding force transmitting member 30 is fitted into the hole 58, the diameter-expanded protrusion (expanded protrusion step) 31 is locked to the diameter-enlarged groove (expanded recess step) 59. Does not fall downward from the bottom plate 56.

  The pressure sensor 28 is formed in a cylindrical shape, and in the base 22 at the lower part of the casing 20, a circular concave groove 60 (see FIGS. 1 and 2) opened at the upper part formed so as to face the pressure force transmitting member 30. Has been inserted. When the applicator 32 is mounted on the base 22, the pressure receiving surface (upper surface) of the pressure sensor 28 abuts the pressing surface (lower surface) of the crimping force transmission member 30 fitted on the bottom of the applicator 32 ( (Including the case of contact with the start of the action of the terminal crimping force). The pressure sensor 28 is composed of a strain resistance element (strain gauge), a piezo element, a piezoelectric transducer such as a piezoelectric ceramic, a magnetoresistive element or the like, and outputs a voltage or the like according to a pressure change (load change). .

  In FIGS. 1 and 2, reference numeral 62 denotes a drive unit having a toggle mechanism for raising and lowering the die pressing portion holder 34 of the applicator 32, and a connecting member (ram) 64 is connected to the upper portion of the die pressing portion holder 34. Then, by driving the drive unit 62, the die pressing portion holder 34 is lowered via the connecting member 64, and the die is pressed by the conductor gripping portion pressing portion 26 a and the covering gripping portion pressing portion 26 b of the pressing portion 26. The conductor gripping portion T2 and the covering gripping portion T1 of the terminal T placed on the receiving portion 24 are pressed to crimp the terminal T to the electric wire W. At the same time, the terminal crimping force acting on the mold receiving part 24 from the mold pressing part 26 via the terminal T is transmitted to the pressure sensor 28 via the crimping force transmitting member 30, the magnitude is measured, and a discrimination circuit (not shown) Thus, the presence or absence of the crimping failure of the terminal T is detected.

  Reference numeral 66 denotes a terminal supply mechanism, which is connected to an upper part of the mold pressing part holder 34 via a lever 68 and is connected to a swinging arm 70 whose upper end is pivotally attached to the casing 20 and is rotatable. As the robot moves up and down, the swing arm 70 is swung clockwise or counterclockwise, and the lower end of the arm is moved left and right, so that the terminals T are mounted one by one from the terminal chain (not shown). It can be supplied to the installation position. The mold receiving part holder 34 may be fixed to the bottom plate 56 side instead of the base frame 40 side.

  According to the terminal crimping apparatus of the first embodiment, since the crimping force transmitting member 30 for transmitting the terminal crimping force to the pressure sensor 28 is interposed between the mold receiver 24 and the pressure sensor 28, the mold receiver 24. When the terminal T placed on the terminal is pressed and crimped to the end of the electric wire W, the terminal crimping force acting on the mold receiving part 24 from the mold pressing part 26 through the terminal T is absorbed or dispersed elsewhere. Without being transmitted to the pressure sensor 28 provided on the base 22 via the crimping force transmitting member 30. As a result, it becomes easy to accurately measure the terminal crimping force with the pressure sensor 28, and the crimping failure of the terminal T can be reliably detected. Further, when the type, size, etc. of the terminal T are changed and the die pressing portion 26 and the die receiving portion 24 are exchanged, the pressure sensor 28 is replaced or a large number of die pressing portions 26 with the pressure sensor 28 and the die receiving portion 24 are prepared in advance. Therefore, there is no need for cost, and the cost of the terminal crimping device can be reduced.

  Further, since the crimping force transmitting member is mounted on the applicator 32 so that the pressure receiving surface abuts on the mold pressing portion 26, the mold receiving portion 24, and the lower portion thereof, the terminal crimping device is assembled, the mold pressing portion and the mold receiving portion. Can be easily replaced, and the workability of assembly and replacement can be improved.

  4A and 4B show a second embodiment of the terminal crimping apparatus according to the present invention, in which FIG. 4A is a partial sectional front view of a main part, and FIG. 4B is a partial sectional side view. In the terminal crimping device of this embodiment, the embossing portion 26 is divided into, for example, a hard metal plate-shaped conductor gripping portion embossing portion 26a and a covering gripping portion embossing portion 26b. The mold receiving portion 24 is divided into, for example, a conductor gripping portion type receiving portion 24a and a covering gripping portion type receiving portion 24b of a hard steel plate-like piece, and the pressure sensor 28 is a conductor gripping portion pressure sensor 28a. And the pressure sensor 28b for covering grips, and the pressure-transmitting force transmitting member 30 is divided into a conductor gripping part transmitting member 30a and a covering gripping part transmitting member 30b.

  When the crimping force transmitting member 30 is thus composed of the conductor gripping part transmitting member 30a and the covering gripping part transmitting member 30b, the crimping force transmitting member 30, that is, the conductor gripping part transmitting member 30a and the covering gripping part. It is preferable that each of the transmission members 30b is formed in a prismatic shape and the hole 58 is formed in a square shape because the positioning of the crimping force transmission member 30 is facilitated.

  When the pressure sensor 28 is composed of the conductor gripping part pressure sensor 28a and the covering gripping part pressure sensor 28b as described above, the pressure sensor 28, that is, the conductor gripping part pressure sensor 28a and the covering gripping part pressure. It is preferable that the sensors 28b are each formed in a prismatic shape and the concave groove 60 is formed in a square shape because the pressure sensor 28 can be easily positioned. Since other configurations are substantially the same as those of the first embodiment, description thereof is omitted.

  According to the terminal crimping apparatus of the second embodiment, the mold receiving part 24 is composed of a conductor grip part mold receiving part 24a and a covering grip part mold receiving part 24b, and the mold pressing part 26 is a conductor grip part pressing part 26a. And the pressing part 26b for the covering grip part, the pressure sensor 28 includes the pressure sensor 28a for the conductor grip part and the pressure sensor 28b for the covering grip part, and the crimping force transmission member 30 is connected to the transmission member 30a for the conductor grip part. Since it consists of the covering grip part transmission member 30b, the terminal crimping force can be measured separately for the conductor gripping part T2 of the terminal T and the covering gripping part T1. Therefore, it is easy to determine whether the crimping failure of the terminal is due to the neck hanging (see FIG. 5C) or the resin grip (see FIG. 5D), and the crimping failure of the terminal can be detected more reliably. Can do.

It is a front view which shows 1st Embodiment of the terminal crimping apparatus which concerns on this invention. It is a side view of the terminal crimping apparatus of FIG. The applicator used with the terminal crimping apparatus of FIG. 1 is shown, (a) is a partial cross section front view, (b) is a partial cross section side view. The 2nd Embodiment of the terminal crimping apparatus which concerns on this invention is shown, (a) is a partial cross section front view of the principal part, (b) is a partial cross section side view. This shows various crimped states when the terminal is crimped to the end of the electric wire, (a) is a normal state diagram, (b) is a cord wire spilled state, (c) is a neck hanging state diagram. (D) is a figure of the state of a resin cage. It is a partially notched front view which shows the conventional terminal crimping apparatus. The other example of the conventional terminal crimping | compression-bonding apparatus is shown, (a) is a front view of a principal part, (b) is a schematic diagram of a die pressing part. It is a schematic diagram which shows the other example of the conventional terminal crimping apparatus. It is a schematic diagram which shows the other example of the conventional terminal crimping apparatus.

Explanation of symbols

20 Casing 22 Base 24 Mold receiving portion 24a Conductor gripping portion mold receiving portion 24b Cover gripping portion mold receiving portion 26 Mold pressing portion 26a Conductor gripping portion pressing portion 26b Covering gripping portion pressing portion 28 Pressure sensor 28a Conductor gripping Pressure sensor for part 28b Pressure sensor for covering grip part 30 Crimping force transmission member 30a Transmission member for conductor grip part 30b Transmission member for covering grip part 31 Expanding protrusion 32 Applicator 34 Mold pressing part holder 36 Holding plate 38 Fixing bolt 40 Base Frame 42 Presser plate 44 Fixing bolt 46 Type receiving part holder 48 Fixing bolt 50 Fixing bolt 52 Presser plate 54 Fixing bolt 56 Bottom plate 58 Hole part 59 Enlarged concave groove 60 Concave groove 62 Drive part 64 Connecting member 66 Terminal supply mechanism 68 Lever 70 Swing arm

Claims (2)

A mold receiving section provided on the base of the casing, a mold pressing section that presses the terminal placed on the mold receiving section and crimps the terminal to the end of the electric wire, and a pressure that measures the terminal crimping force provided on the base In a terminal crimping apparatus comprising a sensor, a crimping force transmission member for transmitting a terminal crimping force to the pressure sensor is interposed between the mold receiving part and the pressure sensor ,
A mold pressing part holder that holds the mold pressing part is supported by a base frame so as to be movable up and down, and a mold receiving part holder that holds the mold receiving part is fixed to a base plate or a bottom plate provided on a bottom part of the base frame, An applicator that is fitted in a hole formed so that the pressure-bonding force transmission member faces the lower side of the mold receiving portion so that the pressure-receiving surface of the pressure-bonding force transmission member contacts the lower surface of the mold receiving portion; The applicator is mounted on the base such that the lower surface of the pressure-bonding force transmitting member is in contact with the upper surface of a pressure sensor mounted in a concave groove provided facing the lower side of the pressure-bonding force transmitting member. A terminal crimping device. The mold receiving portion is made of a covering grip die receiving unit and the conductor grip mold receiving portion consists with the embossing unit covering the gripping portion for embossing portion and the conductor gripping portion for embossing unit, the pressure sensor consists of a pressure sensor unit gripping covering the pressure sensor conductor grip, claim 1, wherein the pressing force transmission member is characterized by comprising a covering gripping portion for transmitting member and the conductor gripping portion for transmitting member Terminal crimping equipment.

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