JPS5923625B2 - Parts press-in device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a component press-fitting device used for press-fitting needle-shaped components such as contact pins or other shapes of press-fitted components into holes in a printed circuit board or the like.

Conventionally, when press-fitting a contact pin etc. into a hole such as a through-hole of a printed circuit board, if the contact pin does not fit into the hole due to bending of the pin etc., the contact pin will be pressed against the surface of the board by press force, making the board unusable. This is a problem in the development of fully automatic press-fitting equipment.

For this reason, countermeasures are taken such as guiding the tip of the contact pin as much as possible and ensuring that the pin tip is inserted into the hole, but depending on the accuracy of the hole position on the board, the degree of bending of the contact pin, etc. It has not become something that can be prevented.
The purpose of the present invention is to prevent the board from being damaged to the point that it cannot be used even when the press-fitted part does not fit into the hole, etc., when the press-fitted part such as a contact pin is press-fitted into the hole etc. of the board. There is no parts press-fitting equipment to provide.

In the present invention, a component holding member is provided so as to be movable relative to a pressing member that is directly driven by a press-fitting drive source, and a press-fitting portion of a press-fitting driving source is depressurized and transmitted between the component holding member and the pressing member. By providing a pressure reducing means capable of detecting the pressure and a first detector capable of detecting the amount of movement of the pressing member and a second detector capable of detecting relative movement between the pressing member and the component holding member, the first detection can be performed. In addition to detecting the insertion (press-fitting) state of the press-fitted part with the device,
The second detector detects the presence or absence or magnitude of relative movement between the component holding member and the pressing member in the inserted state, making it possible to determine whether the insertion is normal or distorted, and if abnormal, the device can be stopped. It is an attempt to achieve a goal.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

A pair of sliding shafts 3 are inserted into a mounting plate 1 that constitutes a part of the main body of the device via guide bearings 2 so as to be able to move up and down, and a component holding member 4 is placed between the lower ends of these sliding shafts 3. Fixed.

This component holding member 4 holds a contact pin 5 as a press-fitted component, and the tip terminal portion 5A of this contact pin 5 has a diameter smaller than the diameter of the hole 6A of the board 6, and this terminal portion The press-fit portion 5B on the base side of the hole 5A is made thicker than the diameter of the hole 6A by the amount of the press-fit portion. A cylinder 7 as a drive source for the press fitting 1 is attached to the mounting portion 1 at the intermediate portion between the two guide bearings 2 provided on the mounting plate 1, and the piston rod 8 of this cylinder 7 extends through the through hole 1A of the mounting plate 1. A pressing member 10 is directly drivably attached to the piston rod 8 via a connecting rod 9 so as to move integrally with the piston rod 8.

A pair of through holes 10A (only one is shown) are formed in this pressing member 10, and support shafts 11 are respectively provided to pass through these through holes 10A. These support shafts 11 have a lower half 11A having a smaller diameter than the through hole 10A, and the lower end thereof is screwed and fixed to the component holding member 4, while an upper half 11B has a larger diameter than the through hole 10A. A pressure regulating nut 12 is screwed into a screw formed at the upper end of this upper half portion 11B. This pressure adjusting nut 12
It is made double and can be fixed with a so-called double nut. Further, on the outer periphery of the upper half portion 11B of the support shaft 11, between the lower surface of the pressure adjusting nut 12 and the upper surface of the pressing member 10, a compression coil spring is provided as a pressure reducing means capable of reducing and transmitting the driving force of the cylinder 7. 13 is interposed, and by adjusting the pressure regulating nut 12, the sliding shaft 3, component holding member 4, contact pin 5, support shaft 11 and pressure regulating nut 1 can be adjusted.
Pressing member 10 applies the weight of the
It is now possible to support it. Further, the pressing member 1
0 has an abutment piece 14 located directly below the connecting rod 9.
is provided in a protruding manner, and this abutting piece 14 is able to abut on the upper surface of the component holding member 4, so that the pressure of the cylinder 7 can be directly transmitted to the component holding member 4. A first detector 16 consisting of a limit switch or the like is attached to the bottom left side of the mounting plate 1 through a bracket 15, and a first dot 17 serves as an actuating member that can actuate the first detector 16. is fixed to one side of the pressing member 10. At this time, the mounting position of the first detector 16 and the operating length of the first dock 17 are such that when the pressing member 10 is lowered by the advance of the piston rod 8, the pressure member 10 is simultaneously lowered via the compression coil spring 13 and the support shaft 11. From the position where the tip of the lower end terminal part 5A of the contact pin 5 held by the component holding member 1 starts to be inserted into the hole 6A of the board 6, the base end of this terminal part 5A, that is, the part close to the press-fitting part 5B is inserted into the hole. 6A, the first detector 16 is at a position and length such that the first detector 16 is turned ON at the first dock 17, and when the pressing member 10 is further lowered. teeth,
The first dot 17 passes through the first detector 16 and the detector 16 is turned off. The pressing member 1
A second detector 19 consisting of a limit switch or the like is attached to the right side of the figure 0 through a bracket 18, and this second detector 19 is used as a second actuating member.
A dock 20 is attached to the upper right side surface of the component holding member 1 in the figure.

At this time, the second detector 19 detects that the distance between the pressing member 10 and the component holding member 4 is equal to or less than a predetermined value, that is, the contact piece 14 is close to contacting the upper surface of the component holding member 4. When the state is reached, the second dock 20 turns ON. The weight of the sliding shaft 3, component holding member 4, contact pin 5, support shaft 11, pressure adjusting nut 12, second dock 20, etc. is calculated from the buckling load of one terminal portion 5A of the contact pin 5. be heavy. In such a configuration, in order to press fit the contact pin 5 into the hole 6A of the substrate 6, first, the pressure of the compression coil spring 13 is adjusted using the pressure adjusting nut 12 to reduce the buckling load of the terminal portion 5A of the contact pin 5. Part of the weight of the component holder 4, sliding shaft 3, etc. is supported so that the component holder 4 can be lifted with a slightly weak force. In this state, the contact pin 5 is set on the component holding member 4, the cylinder 7 is operated to advance the piston rod 8 downward, and the pressing member 10 is lowered via the connecting rod 9. As the pressing member 10 descends, the compression coil spring 1
3, the component holding member 4 supported via the pressure adjusting nut 12 and the support shaft 11 also descends using the sliding shaft 3 and the guide bearing 2 as guides, and the tip of the lower terminal portion 5A of the contact pin 5 touches the substrate 6. When it begins to be inserted into the hole 6A, the first detector 16 is turned ON by the first dock 17, and the terminal portion 5
The start of insertion of A is detected.

At this time, if all the terminal parts 5A of the contact pins 5 are smoothly inserted into the holes 6A of the board 6, the component holding member 4 is hardly touched in the upward direction, so that the pressing member 10
and the component holding member 4 descend while maintaining their initial relative positional relationship, and therefore the second detector 19 & $ second dock 2
The state of 0FF is maintained without contacting 0.
In this way, the contact pin 5 is lowered, and almost the entire terminal portion 5A of the contact pin 5 passes through the hole 6A.
When the press-fitting portion 5B approaches the hole 6A, the first detector 16 passes through the operating surface of the first dock 17 and is set to the 0FF state.

When the contact pin 5 is further lowered from this state, the press-fit portion 5B comes into contact with the entrance of the hole 6A of the substrate 6, and the lowering of the component holding member 4 is stopped. On the other hand, since the pressing member 10 further descends, the second detector 19 comes into contact with the second dock 20 and is turned ON, and the lower end of the contact piece 14 contacts the upper surface of the component holding member 4. Since the component holding member 4 is directly pressed by the contact piece 14 and pressed by the driving force of the cylinder 7, the press-fitting portion 5B of the contact pin 5 is press-fitted into the hole 6A of the board 6, and the preset position of the cylinder 7 is pressed. Press-fitting is completed at the stroke end. On this occasion,
The second detector 19 is 0N, but the fourth detector 16 is 0FF, so it is not determined to be abnormal. When the press-fitting is completed, the cylinder moves backward in the direction of the supply of working fluid, so the pressing member 10 rises via the connecting rod 9. As the pressing member 10 rises, the component holding member 4 also rises, and is ready for the next press-fitting operation. It will be prepared.

On the other hand, at the beginning of the descent of the component holding member 4, that is, when the tip of the terminal portion 5A of the contact pin 5 starts to be inserted into the hole 6A of the board 6, the contact pin 5 may be bent and If even a part of the terminal portion 5A does not fit into the terminal portion 5A, the weight of the component holding portion 4, etc. is lighter than the buckling load of the terminal portion 5A due to the action of the compression coil spring 13, so that the terminal caught on the board 6 may The component holding member 4 is stopped at that position by the action of the portion 5A.

On the other hand, since the pressing member 10 continues to descend as the piston rod 8 of the cylinder 7 advances, the pressing member 10
0 and the component holding member 4 becomes narrower, the second detector 19 comes into contact with the second dock 20, and is turned ON. At this time, since the first detector 16 is turned ON at the same time as the insertion of the terminal portion 5A into the hole 6A, both the first and second detectors 1
6 and 19 are turned ON, failure in insertion of the contact pin 5 is detected, a control mechanism (not shown) stops the cylinder 7 from lowering, and alarm means such as a lamp warns of the failure in insertion. According to this embodiment as described above, when the contact pin 5 is press-fitted into the substrate 6, two stages of strong and weak pushing forces are generated by the action of the compression coil spring 13 as a pressure reducing means, and the initial weak pushing force is By detecting the displacement between the component holding member 4 and the pressing member 10 directly connected to the cylinder 7 using the second detector 19, failure to insert the terminal portion 5A of the contact pin 5 into the hole 6A of the board 6 can be detected. , further lowering of the component holding member 4 can be stopped.
Damage to the substrate 6 can be reliably prevented.

In addition, compared to the conventional structure, the pressing member 10 and the component holding member 4 are
By adding a relatively simple structure such as a sliding mechanism and a detector, it is possible to fully automate the device without damaging the board 6, which significantly reduces the amount of work performed by the operator with a slight increase in equipment costs. It is possible to significantly reduce the manufacturing cost of the product. In the above embodiment, the case where the buckling load of one terminal portion 5A of the contact pin 5 is smaller than the weight of the component holding member 4, etc. has been described, but in the opposite case, the pressure reduction means for the pressing member 10 is used. This can be achieved by reversing the mounting position of the compression coil spring 13 and providing it between the pressing member 10 and the component holding member 4.

Furthermore, although not explained in the above embodiment, the component holding part 4 requires a mechanism for aligning the tip of the terminal part 5A of the contact pin 5, and since this may have a structure similar to that of the prior art, the explanation will be omitted. did. Furthermore, the first and second detectors 16,1
9 and the first and second dots 17 and 20 may be reversed; for example, the first detector 16 may be provided on the pressing member 10 side, and the first dot 17 may be provided on the bracket 15 side. In addition, the detectors 16 and 19 are not limited to limit switches, but other means such as reed switches and optical switches may also be used. It is only necessary that the second detector 19 can detect the displacement of the relative position between the pressing member 10 and the component holding member 4. At this time, by providing variable detection positions by the first and second detectors 16 and 19, it is possible to correspond to different press-fitted parts. Further, in the above embodiment, the contact pin 5 was explained as the press-fitted part, but the present invention is not limited to this.
It can also be applied to other press-fitted parts. As described above, according to the present invention, it is possible to provide a component press-fitting device that can reliably detect insertion failure of a press-fitted component at an early stage of insertion.

[Brief explanation of drawings]

The figure is a half-sectional front view showing an embodiment of a parts press-fitting device according to the present invention. DESCRIPTION OF SYMBOLS 1... Mounting plate constituting a part of the device main body, 2... Guide bearing, 3... Sliding shaft, 4... Component holding member, 5...
...Contact pin as press-fitted part, 5A...terminal part, 5B...press-fitting part, 6...board, 6A...hole, 7...cylinder as press-fitting drive source, 10... - Pressing member, 11... Support shaft, 13... Compression coil spring as pressure reducing means, 16... First detector, 17...
- A first dock as a first detector operating member, 19.
...Second detector, 20...Second dock as a second detector operating member.

Claims (1)

[Claims] 1. A press-fitting drive source supported by the device body, a pressing member that is directly connected to this press-fitting drive source and operated together with the press-fitting drive source,
A component holding member which is movable in the press-fitting direction of the press-fitted part into the apparatus main body and is movable relative to the press-fitting direction with respect to the press-fitting member and holds the press-fitted part, and a component holding member and the pressing member. a pressure reducing means interposed between the press-fitting drive source and the pressure reducing means capable of reducing the pressure of the driving force from the press-fitting drive source and transmitting the reduced pressure to the component holding member; a first detector capable of detecting the amount of movement of the pressing member relative to the device body; A component press-fitting device comprising: a second detector capable of detecting a change in relative position with respect to a component holding member.