JP5158941B2 - Connector press-fitting device - Google Patents

Description

The present invention relates to an apparatus for press-fitting a connector into a board provided with printed wiring frequently used for electronic components, and more particularly to an apparatus for press-fitting a solderless connector called a “press-fit connector” into the board.

In recent years, the number of cases in which a solderless press-fit connector “press-fit connector” is employed in an assembly process of an apparatus using a substrate is increasing. While conventional connectors are connected by soldering when mounted on a substrate, the press-fit connector method can be mounted by a simple method by press-fitting, and the process can be simplified.
In addition, there is an active movement to reduce harmful substances and environmentally hazardous substances in society, and manufacturing industries are required to make products that do not contain these substances regardless of the field. The press-fit connector is a manufacturing method adapted to the times.

As shown in FIG. 7 and FIG. 8, the press-fit connector is energized when a plurality of terminals 821 (press-fit portions) are inserted into through-hole portions formed in the printed circuit board 80 and brought into contact with each other. Therefore, the fitting relationship between the press-fit portion of the terminal and the through hole of the printed circuit board is designed to be a close fit, and contact energization is performed by the restoring force generated by the tightening allowance.
For this reason, the press-fit connector press-fitting device needs a sufficient pressure for insertion. Usually, a press-fit connector is set in a connector press-fitting device in a state of being temporarily inserted into a board, and is inserted and mounted by a connector press-fitting device. In order to mount the press-fit connector on the printed circuit board, a dedicated pressure jig is required.
The initial press-fit connector press-fitting device manually press-fits the press-fit connectors temporarily inserted into the board one by one.

  Generally, an upper jig and a lower jig are used as the press-fitting jig, and the upper jig has a shape that can be easily press-fitted according to the shape and direction of the press-fit connector. The lower jig is made so that the board is not distorted and deformed by the pressure when press-fitting the press-fit connector, and when the terminal of the press-fit connector penetrates through the through-hole of the board, The tip of the terminal of the press-fit connector that pops out is protected so as not to hurt.

Conventionally, the substrate was placed on the lower jig, positioned, and then the upper jig was manually press-fitted and assembled. However, in these conventional press-fit connector press-fitting devices using a hydraulic cylinder or a crank mechanism, pressure accuracy such as pressure and insertion distance cannot be increased, and press-fitting conditions are limited.
In addition, as proposed in Patent Document 1, there is also proposed a method of automatically setting and press-fitting various conditions that are automatically set when a switch is turned on by motor driving or the like. However, in this method, as shown in FIG. 9, after the substrate 90 is placed on the table 90 and positioned, the upper jig 91 is lowered by the motor or cylinder of the press-fitting portion 92 to press-fit the press-fit connector. Had to be manually replaced to match the press-fit connector.

However, as shown in FIG. 8, the shape of the press-fit connector is various, and it is also necessary to assemble a plurality of press-fit connectors 81 and 82 on one substrate 80. In such a case, the upper jig corresponding to the press-fit connectors 81 and 82 must be replaced with respect to the substrate 80 attached to the lower jig.
Normally, the press-fit connectors 81 and 82 are temporarily inserted into the board 80 and set on the lower jig and placed on the table 90 in FIG. 9, but the press-fit connectors 81 and 82 and the board 80 are slightly tilted during this insertion. If press-fitting is performed in a certain state, the plating 80 may be roughened in the through hole, which is a hole in the board 80, or the terminal 821 of the press-fit connector may be bent, reducing the reliability of press-fit connector press-fitting contact. There was sex.
The terminal 821 of the press-fit connector, as shown in detail 821 in FIG. 8, has a middle step that is swollen and is an interference fit when passing through the through hole. Therefore, after temporary insertion and positioning, it must be press-fitted with a constant pressure. When there are many press-fit connector terminals 821, a pressure input of 2 tons or more is required.

Further, in the press-fit connector 83 as shown in FIG. 7, the rear end portion of the terminal protrudes from the case, and the shape like the upper jig 91 in FIG.
Conventionally, as in Japanese Patent Application No. 2007-159971 filed by the present applicant, press-fit connectors 81 to 83 temporarily inserted into the board 80 are pressed by the selected upper jig 10 to be fully inserted to complete the mounting. It was a thing. Therefore, the press-fit connectors 81 to 83 are always provisionally inserted into the board 80. In addition, most of the temporary insertion work is performed manually, which is not efficient and is often temporarily inserted in a tilted state, and it has been desired to omit the temporary insertion work.
JP 2006-73808 Japanese Patent Application No. 2007-159971

As described above, the press-fit of the press-fit connector depends on the size and the number of terminals, but it must be pressed with a pressure of 2000 kg or more. Therefore, it is necessary to consider the lower jig so that the substrate is not deformed. At the same time, the upper jig needs to be evenly pressurized so that the terminals 821 of the press-fit connector are not deformed.
Further, the press-fit connector 83 as shown in FIG. 7 has a protruding rear end portion of the terminal 821, and it was necessary to press the terminal shoulder 821a as shown in FIG. .

  Conventionally, a press-fitting device as shown in FIG. 9 is used, and after mounting and positioning the substrate on the table 90, the conventional press-fitting portion 92 is driven to lower the conventional upper jig 91, and the The press-fit connector on the board was press-fitted. However, in this method, the press-fit connectors 81, 82, and 83 need to be replaced by human hands and cannot be automated.

As shown in FIG. 8, various shapes of press-fit connectors 81 and 82 are attached to the substrate 80. Conventionally, after being temporarily inserted into the substrate 80 by a human hand, the book is inserted by a working machine as shown in FIG. However, when the substrate 80 becomes large and various press-fit connectors 81, 82, and 83 can be attached, a large amount of labor is required for temporary insertion work and upper jig replacement work, which is inefficient.

In order to automate all of the press-fit connector press-fitting operations, it is desirable to automatically select an upper jig corresponding to the press-fit connectors 81, 82, and 83 and insert it into the board 80 without temporary insertion.

  Therefore, in a connector press-fitting device for press-fitting and mounting a press-fit type connector on a substrate, a plurality of types of connectors, a plurality of types of upper jigs for chucking the plurality of types of connectors, and clamping means for clamping the upper jigs A pressing unit provided, a moving unit that moves the pressing unit to a position on the substrate corresponding to each of a plurality of types of connectors, and the pressing unit is moved by the moving unit, and the upper jig is clamped by the pressing unit. Then, after chucking the connector corresponding to the upper jig, the moving unit is provided with control means for controlling the press part to move to the press-fitting position of the connector on the substrate and press the connector. A connector press-fitting device is provided.

In the connector press-fitting device that press-fits and attaches a press-fit type connector to the board, an image pickup unit that picks up the connector chucked by the upper jig and the connector of the board based on the image picked up by the image pickup unit A calculation unit that detects a predetermined position for press-fitting, a control unit that controls the upper jig, the press unit, the moving unit, the imaging unit, and the calculating unit, and the pressing unit is moved by the moving unit. The upper jig is clamped by the press unit, the connector is chucked by the upper jig, the image is captured by the imaging unit, a predetermined position is calculated by the arithmetic unit, and the moving unit is controlled by the control unit There is provided a connector press-fitting device characterized by comprising control means for controlling to press-fit the connector to a predetermined position of the board.
Further, the image pickup section picks up an image from below the connector, and the tip of the upper jig has a comb-teeth shape corresponding to the terminal of the connector. Is to provide.

According to the present invention, the upper jig 10 can be selected and clamped to the press portion 11 in accordance with the substrate 80 installed on the lower jig 9. Thereafter, predetermined press-fit connectors 81 to 83 are selected and chucked at the tip of the upper jig 10. The press part 11 is moved to a predetermined position on the substrate 80 as it is and immediately press-fitted and mounted without being temporarily inserted. By this means, the temporary insertion work of the press-fit connectors 81 to 83 can be omitted, and the press-fit connector is not mounted with an inclination, so that the occurrence of defective products can be eliminated.
And, to improve the quality without reducing the reliability of press-fit connector press-fitting contact by causing rough plating on the through hole, which is a hole in the board 80, or bending the terminal 821 of the press-fit connector. Can now.

In addition, the insertion position of the press-fit connectors 81 to 83 can be confirmed by the through holes opened in the substrate 80 by imaging with the second camera 7 that moves together with the press unit 11, so that it is inserted by mistake. Can be prevented.

Furthermore, the position of the terminals of the press-fit connectors 81 to 83 chucked by the upper jig 10 is imaged from the lower direction with the first camera 8 and confirmed as an image recorded in advance by the arithmetic unit, and the press unit 11 is rotated. Since it is rotated at a predetermined angle, conveyed to a predetermined position, and inserted into the substrate 80, a reliable mounting operation is automatically performed.

Further, even if the press-fit connector 83 as shown in FIG. 7 is formed by combing the tip of the upper jig 10, the shoulder 821 portion of the terminal is press-fitted as shown in detail of the terminal 821 in FIG. Even if press-fitting with a pressing force of 2000 kg or more, the terminal 821 can be prevented from being deformed.
If it is the above methods, even if it is many types of press-fit connectors 81-83, it can be surely automatically attached to the substrate 80.

  As shown in FIG. 1 and FIG. 2, the present invention has a press part 11 that can be moved within the working range by an X direction guide 15 and a Y direction guide 14, and the press part 11 clamps the upper jig 10 and press fit connector. 81 to 83 can be pressed and pressed into the substrate 80. The press part 11 can be moved in the Z direction by the press-fitting part 13. By such moving means of the press unit 11, the press unit 11 can be controlled to move within the work range of the three-dimensional space by the control unit 2.

    The present invention is a method in which the press-fit connectors 81 to 83 are directly chucked by devising the upper jig 10 clamped to the press part 11 and conveyed to a predetermined position on the substrate 80 and directly press-fitted into the substrate 80. The step of temporarily inserting manually as in the prior art can be omitted, the overall work can be made more efficient, and the mounting quality of the press-fit connectors 81 to 83 can be remarkably improved.

FIG. 1 is a perspective view of the entire press-fit connector press-fitting device. FIG. 2 is a front view of the entire press-fit connector press-fitting device. FIG. 3 shows an enlarged state of the entire press section, and shows a state where the chuck 16 of the upper jig 10 is closed. FIG. 4 shows an enlarged state of the entire press portion mounted on the main body, and shows a state where the chuck 16 of the upper jig 10 is opened.
FIG. 5 shows a cross section of the press part 11, and shows a mechanism for clamping the upper jig 10 and a mechanism for pressing the central part of the upper jig 10 to open and close the chuck 16 of the upper jig 10.
FIG. 6 shows a front view and a side view of the upper jig 10, and shows a mechanism of the upper jig. FIG. 7 shows a press-fit connector 83 of a type in which the rear end portion of the terminal protrudes. FIG. 8 shows details of the press-fit connector and the connector terminal mounted on the board 80. FIG. FIG. 9 shows a conventional press-fit connector press-fitting device.

  The entire connector press-fitting device will be described with reference to FIGS. The press-fit connectors 81 to 83 having various shapes are placed at predetermined positions on the connector base 12. Their positions are arranged in a predetermined place by a dedicated tray. The predetermined location of the dedicated tray is stored in the control unit 2.

  The substrate 80 is placed on the lower jig 9. The substrate 80 is also placed at a preset position, and the position of the through hole into which the terminal 821 of the press-fit connector is inserted is stored by the control unit 2, and the press unit 11 is controlled. When the board 80 is set, the function of the second camera 7 to determine the insertion position of the press-fit connectors 81 to 83 by looking at the through-hole position of the board 80 is programmed by the control unit 2 and the calculation unit 3.

  The upper jig 10 is placed at a predetermined position on the upper jig base 17, and the type and position of the upper jig 10 are also placed at predetermined positions, and are stored in the control unit 2 and the calculation unit 3. . The type of the upper jig 10 is discriminated by another sensor (not shown), and the position and type are stored by the control unit 2.

The press part 11 is moved in the X direction by the X direction guide 15 and the X direction motor 18 together with the upper press-fitting part 13, and is similarly moved in the Y direction by the Y direction guide and the Y direction motor 19. The X-direction motor 18 and the Y-direction motor 19 are connected with an X-direction screw portion 181 and a Y-direction screw portion 191. When the screw portions 182 and 192 are rotated by driving each motor, The screw receiving portion 192 moves and the press portion 11 can move within the working range.
Each motor has a built-in rotary encoder, and generates a pulse corresponding to the rotation. By measuring the pulse, the accurate position of the press unit 11 can be controlled by the control unit 2.

  The press part 11 can move the press part 11 up and down in the Z direction by extending a shaft 131 in the press-fitting part 13. In addition, a load cell (load meter) is built in the shaft 131, and the load generated in the press unit 11 is measured, detected by the calculation unit 3, and controlled by the control unit 2.

  In addition, the upper jig 10, 10a, 10b is discriminated by a sensor (not shown), and the control unit 2 stores which upper jig is located by comparing with the data stored in the calculation unit 3. It can be made to.

  The positions of the press-fit connectors 81 to 83 on the connector base 12 are stored in the control unit 2 by a dedicated tray.

A second camera 7 is fixed to the side of the press unit 11 and can move within the working range in the same manner as the press unit 11. By moving this second camera 7 and imaging the position of the through-hole on the substrate 80, it is compared with the data stored in the calculation unit 3, and which press-fit connector 81 to 83 applies to which position Can be calculated and stored in the control unit 2.
The tray 80 that has been supplied with the substrate 80 and the press-fit connectors 81 to 83 after work is emptied may be replaced manually, or may be replaced automatically by using a belt conveyor or the like (not shown).

  Details of the press unit 11 will be described with reference to FIG. The press part 11 is lowered together with the vertical movement plate 23 by driving a motor from the upper press-fitting part 13 and extending the shaft 131. Further, a pressing force of 2000 kg or more is generated in the press section 11 by the shaft 131.

A rotary motor 21 is provided above the press unit 11, and the direction of the upper jig 10 can be changed by rotating the press unit 11 with a timing belt 22. A second camera 7 is attached to the vertical movement plate 23 so that it can move and image in the same manner as the press unit 11.
All motors used in the present invention are equipped with a rotary encoder, and the position of a workpiece such as the press unit 11 is determined by the control unit 2 by measuring the number of pulses generated by the encoder. And controlled.

The press unit 11 is configured to clamp the upper jig 10 by a clamp 20. The internal configuration of the press unit 11 will be described with reference to FIG.
The inside of the press part 11 is hollow, and when the clamp cylinder 25 is extended, the clamp plate 27 is lowered and the clamp 20 is opened. Further, the push bar 261 is also lowered so as to push out the upper jig 10.
A chuck cylinder 26 is attached below the clamp cylinder 25 of the press unit 11, and the chuck 30 attached to the upper jig 10 is opened and closed by expanding and contracting the cylinder rod.

The chuck 30 and the comb teeth 31 of the upper jig 10 will be described with reference to FIG. A lower end portion of the upper jig 10 has a comb-teeth 31 shape, and is inserted into the rear end portion of the terminal 821 of the press-fit connector 83.
When chucking the connector 83 placed on the connector base 12 with such a structure, the upper jig 10 is lowered so that the press-fit connector 83 and the comb teeth 31 come into contact with the terminal 821 of the press-fit connector 83. If there is, a load is generated. At that time, the control unit 2 controls the load cell built in the press-fitting unit 13 to judge the load and interrupt the operation as an error.
With such a structure, the comb teeth 31 are inserted into the rear end portion of the press-fit connector 83 without error, and the side surfaces are gripped by the chuck 30.

  With the above configuration, the upper jig 10 is accurately inserted into the press-fit connector 83. When the upper jig 10 is inserted into the press-fit connector 83 to a predetermined depth, the chuck 30 is closed and the press-fit connector 83 is chucked to the upper jig 10 accurately.

  If the surface is flat and smooth like the press-fit connectors 81 and 82, suction holes can be attached to the upper jig 10 and sucked to hold the press-fit connectors 81 and 82 to the upper jig 10. it can.

  The configuration of the chuck 30 of the upper jig 10 will be described with reference to FIG. A hole is opened in the center of the upper surface of the upper jig 10, and a chuck shaft 35 is provided. The chuck 30 is configured to be pulled inward by a spring 32 to grip the press-fit connector 83.

  The chuck 30 is fixed by an L-shaped metal fitting 33, and the L-shaped metal fitting 33 is rotatably held by two right and left pins. With such a structure, when the chuck shaft 35 is pushed, the chuck 30 is opened, and when the chuck shaft 35 is not pushed, it is pressed against the upper jig 10 by the force of the spring 32.

As shown in the left diagram of FIG. 6, the chuck 30 is open until the comb tooth 31 is inserted without generating a load due to interference with the terminal 821 of the press-fit connector 83, and the upper jig 10 is moved to a predetermined depth. When inserted into the press-fit connector 83, the chuck 30 is closed, and the press-fit connector 83 is transported to a predetermined position on the substrate 80 while being attached to the upper jig 10.

The operation of the connector press-fitting device configured as described above will be described. In the main body 1, the upper jigs 10, 10a, and 10b are set on the upper jig table 17 by hand or other conveying means. Similarly, press-fit connectors 81 to 83 are set on the connector base 12. Further, when the substrate 80 is set on the lower jig 9, the mounting operation is started.

The upper jigs 10, 10 a, 10 b are discriminated by the sensor and compared with the data of the upper jigs 10, 10 a, 10 b stored in the calculation unit 3, and the type and position of the upper jig are stored in the control unit 2. The upper jigs 10, 10a, and 10b are attached with marks such as barcodes, and are devised so that the type can be determined by imaging from above even when placed on the upper jig base 17. is there.

The types and positions of the press-fit connectors 81 to 83 on the connector base 12 are stored in the control unit 2 in advance.

The second camera 7 adjacent to the press unit 11 images the substrate 80 set on the lower jig 9, compares the data with the substrate 80 stored in the arithmetic unit 3, and opens the substrate 80. The positions of the through holes (not shown, holes for inserting press-fit connector terminals 821) are stored in the control unit 2.

Through the above operations, the respective correlations of the upper jigs 10, 10a, 10b, the press-fit connectors 81 to 83, and the substrate 80 are calculated in the calculation unit 3 and stored in the control unit 2.

Next, the press part 11 moves onto the upper jig 10 set on the upper jig base 17, pushes out the clamp cylinder 25, opens the clamp 20, drives the press-fitting part 13 and lowers the press part 11 to move the upper jig 10 After the press part 11 is press-contacted, the clamp cylinder 25 is retracted, the clamp 20 is closed, the upper jig 10 is clamped to the press part 11 and the press-fitting part 13 is driven to rise.

With the upper jig 10 clamped, the press unit 11 moves to the connector base 12 and stops immediately above the press-fit connector 83. Then, based on the data stored in advance, after rotating the rotary motor 21 and rotating the upper jig 10 to a predetermined angle, the chuck cylinder 26 is pushed out and the chuck shaft 35 is pushed, and the chuck 30 of the upper jig 10 is moved. After the opening, the press-fitting part 13 is driven to lower the press part 11, and the comb teeth 31 of the upper jig 10 are inserted between the terminals of the press-fit connector 83 as shown in the left figure of FIG.

At this time, if the comb teeth and the terminal come into contact with each other, the load cell (not shown) provided in the press-fitting portion 13 senses it, displays an error, and stops the operation.

After the comb teeth 31 are inserted to a predetermined depth, the chuck cylinder 26 is contracted, the chuck 30 is closed by the pulling force of the spring 32, and the press-fit connector 83 is chucked at the lower end of the upper jig 10. Thereafter, the press-fitting part 13 is driven to raise the press part 11.
If the upper surface is smooth like the press-fit connectors 81 and 82, it may be chucked by the chuck 30 as described above, or a suction hole is provided in the upper jig 10, and the press-fit connectors 81 and 82 are You may make it adsorb and hold.

The press part 11 that clamps the upper jig 10 chucked with the press-fit connector 83 at the lower end moves to the upper part of the first camera 8 and images the press-fit connector 83 from below. This data is compared with the data stored in advance by the calculation unit 3. The result calculated by the calculation unit 3 is sent to the control unit 2, and the press unit 11 is rotated to a predetermined angle to move directly above the through hole on the substrate 80.

Then, the press-fit connector 83 is press-fitted into the through-hole based on the data initially captured by the second camera 7 and compared by the calculation unit 3 to a predetermined depth with a predetermined pressure to complete the mounting of the press-fit connector 83. To do. Thereafter, the press unit 11 moves up, returns the upper jig 10 onto the upper jig table 17, clamps the next upper jig 10a, and repeats the same operation.

The above method automatically selects the upper jig 10 and automatically chucks the press-fit connectors 81 to 83 even when various types of press-fit connectors 81 to 83 are mounted on the substrate 80. It is automatically inserted into a predetermined through hole, and one substrate can be completely completed.

It is not necessary to set the temporarily inserted substrate on the lower jig 9 and press-fit it with different types of upper jigs one by one as in the prior art, and once set, it can be automated until completed.

In addition, by making the tip of the upper jig 10 into a comb-teeth 31 shape, even if it is a press-fit connector 83 of the type in which the rear end of the terminal 821 protrudes, the portion of the terminal shoulder 821a is press-fitted, so the whole is 2000 kg The terminal 821 is not broken even when pressed with such a large pressure.
Further, when the terminal 821 and the comb tooth 31 interfere with each other at the time of insertion, it is detected as an error, so that it can be prevented from being erroneously inserted. Further, since it is detected even when the terminal of the press-fit connector 83 is deformed, defective products can be eliminated.

The present invention can be applied not only to press-fit devices for press-fit connectors but also to press devices that perform press work with several types of jigs.

It is a perspective view of the whole press fit connector press-fitting device. It is the figure which looked at the press fit connector press-fit apparatus whole from the front. It shows a state where the entire press section is enlarged, and shows a state where the chuck of the upper jig is closed. The state which expanded the whole press part with which the main body was mounted | worn is shown, The state which opened the chuck | zipper of the upper jig is shown. The cross section of a press part is shown, and the mechanism which presses the center part of an upper jig and presses the center part of an upper jig, and opens and closes the chuck | zipper of an upper jig is shown in figure. The top view and side view of the upper jig are shown, and the mechanism of the upper jig is shown. The left figure shows a state in which the chuck 30 is opened and inserted into the press-fit connector 83. The middle figure shows a state in which the chuck 30 is closed. The right figure shows a side view of the upper jig 10 and a view seen from above. The press fit connector of the type from which the rear end part of the terminal protruded is shown. It shows in detail the press-fit connector and connector terminal mounted on the board. This is a conventional press-fit connector press-fitting device.

Explanation of symbols

1
Body
2
Control unit
Three
Calculation unit
7 Second camera
8
First camera
9
Lower jig
10 Upper jig
11 Press department
12 Connector base
13 Press-fit part
131 shaft
14 Y direction guide
15 X direction guide
16 Chuck
17 Upper jig stand
18 X direction motor
181 X direction thread
182 X direction screw receiving part
19 Y direction motor
191 Y direction thread
192 Y direction screw holder
20 Clamp
21 Rotating motor
22 Timing belt
23 Vertical movement plate
25 Clamp cylinder
26 Chuck cylinder
261 extrusion bar
27 Crank plate
30 chuck
31 comb teeth
32 Spring
33 L-shaped bracket
35 Chuck shaft
80 substrates
81 Press-fit connector
82 Press-fit connector
83 Press-fit connector (exposed terminal rear end)
821
Terminal (Press-fit connector)
821a terminal shoulder
90 tables (conventional)
91 Upper jig (conventional)
92 Press-fit part (conventional)

Claims (3)

In a connector press-fitting device for press-fitting a press-fit connector onto a board,
Multiple types of connectors,
A plurality of types of upper jigs for chucking the plurality of types of connectors,
A press part having a clamping means for clamping the upper jig;
A moving unit for moving the press unit to a position on the substrate corresponding to each of the plurality of types of connectors;
The pressing unit is moved by the moving unit, the upper jig is clamped by the pressing unit, and a connector corresponding to the upper jig is chucked, and then the pressing unit is moved to the connector on the substrate by the moving unit. Control means for controlling the connector to be press-fitted and moved to the press-fit position;
Furthermore, an imaging unit that images the connector chucked on the upper jig,
A calculation unit for detecting a predetermined position for press-fitting the connector of the board based on an image captured by the imaging unit;
A control unit for controlling the upper jig, the press unit, the moving unit, the imaging unit, and the calculation unit;
The control means moves the press part with the moving part, clamps the upper jig with the press part, chucks the connector with the upper jig, takes an image with the imaging part, and uses the arithmetic part to A connector press-fitting device that calculates a predetermined position and controls the moving unit to be pressed into a predetermined position of the substrate by controlling the moving unit with the control unit. Connector press-fitting apparatus according to claim 1, wherein said imaging unit, characterized in that so as to imaging from below of the connector. 2. The connector press-fitting device according to claim 1, wherein a tip end portion of the upper jig has a comb-teeth shape corresponding to a terminal of the connector.