CN1051200C

CN1051200C - Electronic component assembling device

Info

Publication number: CN1051200C
Application number: CN95116984A
Authority: CN
Inventors: 志摩真; 新美滋
Original assignee: Denso Corp
Current assignee: Denso Corp
Priority date: 1994-11-16
Filing date: 1995-09-18
Publication date: 2000-04-05
Anticipated expiration: 2015-09-18
Also published as: JPH08148894A; CN1123512A

Abstract

An electronic component mounting apparatus for mounting electronic components on a printed circuit board is composed of an apparatus main body and a ramp plate incorporated in the apparatus main body. The piston is arranged in the cylinder and can move back and forth, and the rod is fixed on the piston. An L-shaped fitting is fixed to the front end of the rod. A pin fixed to the cam plate reciprocates a moving blade of the inclined plate. When the lever is reciprocated, the pin is moved in the cam groove, and the movable blade is reciprocated in a direction perpendicular to the lever together with the cam plate. Thus, the lead wire of the electronic component inserted into the printed circuit board mounted on the inclined plate can be cut into a predetermined length and bent at a predetermined angle.

Description

Electronic component assembling device

The present invention relates to an electronic component mounting apparatus for mounting electronic components on a printed circuit board.

The prior art of mounting electronic components on a printed circuit board is done manually or fully automatically. In the manual assembly, inserting an electronic component on a printed circuit board, cutting off unnecessary lead wires protruding from a printed circuit board and bending the lead wires are manually operated; in the fully automatic assembly, the manual work is performed mechanically.

However, in the conventional assembly in which the electronic components are manually inserted into the printed circuit board, the electronic components cannot be uniformly mounted on the printed circuit board due to the difference in the degree of cutting and bending of the lead wires. The problems arising from this reason are: the lead wires cut by soldering are difficult to be soldered to the printed circuit board, or the lead wires are brought into contact with other components when the printed circuit board is mounted, which causes troubles in the mounting work, and the mounting time is long, so that the work efficiency cannot be improved.

On the other hand, the fully automatic assembly is installed evenly and has a short assembly time as compared with the manual operation, but has problems that: the cost required for equipment investment is too high.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a small-sized and low-cost electronic component mounting apparatus capable of mounting electronic components with high quality.

To achieve the above object, the present invention provides an electronic component mounting apparatus for mounting an electronic component on a printed circuit board, comprising: deflector, fixed sword, removal sword and actuating mechanism, characterized by:

the guide plate is formed with an accommodation hole for accommodating and holding the printed circuit board;

the fixing knife is arranged at the lower side of the guide plate and is provided with a plurality of wire holes into which a plurality of outgoing wires are inserted, and the outgoing wires of the electronic element penetrate through and protrude out of the printed circuit base plate;

the movable knife is flat, is arranged between the guide plate and the fixed knife, can move in parallel, is internally provided with a knife which acts together with the fixed knife and cuts the leading-out wire, and is provided with a plurality of knife holes through which the leading-out wire passes;

the driving mechanism enables the movable knife to move in parallel;

wherein the blade of the blade hole is formed with an inclined surface facing the side surface of the guide plate, and the lead wire is bent by the inclined surface.

Wherein, the blade is formed at the blade hole along the two ends of the moving direction of the moving blade;

wherein the driving mechanism moves back and forth in sequence in two directions, one direction and the other direction, and the blade on one side cuts at least one of the lead-out wires when moving in one direction and the blade on the other side cuts at least the other lead-out wire when moving in the other direction.

Wherein the driving mechanism comprises a cylinder and a cam mechanism, and the cylinder is provided with a rod which is driven in a telescopic way in the axial direction; the cam mechanism is arranged between the cylinder and the movable knife and converts the stroke of the rod in any one direction of the extending direction or the retracting direction into the reciprocating movement of the movable knife;

wherein the cam mechanism has a cam plate and a connecting pin, and the cam plate is provided with a cam groove extending obliquely to the extension direction of the rod and connected to the movable knife; the pin is inserted into the cam groove and connected to the lever.

Wherein the driving mechanism comprises a cylinder and a cam mechanism, and the cylinder is provided with a rod which is driven in a telescopic way in the axial direction; the cam mechanism is provided between the cylinder and the movable blade, and converts a stroke of the rod in either one of an extending direction or a retracting direction into a reciprocating movement of the movable blade.

Wherein the cam mechanism has a cam plate and a connecting pin, and the cam plate is provided with a cam groove extending obliquely to the extension and retraction direction of the rod and connected to the movable knife; the pin is inserted into the cam groove and connected to the lever.

Wherein the guide plate, the fixed blade and the movable blade are fixedly connected to each other, and are formed as a swash plate which can be engaged with and disengaged from the driving mechanism.

Wherein the movable knife is provided with a connecting member which is arranged on the driving mechanism in a protruding way and can be in clutch with a pin driven by the driving mechanism to reciprocate.

The following detailed description of embodiments of the invention refers to the accompanying drawings. Wherein,

fig. 1 is a sectional view of a device main body of an electronic component mounting apparatus according to an embodiment of the present invention.

Fig. 2 is a plan view of the device main body of the electronic component mounting device of the embodiment shown in fig. 1.

Fig. 3 is a view in the direction of the arrow of III in fig. 2.

Fig. 4 is a plan view of a printed circuit board mounted on a ramp board of an electronic component mounting apparatus according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view taken along line V-V of FIG. 4.

Fig. 6 is an exploded view of the installation of the ramp plate in this embodiment.

Fig. 7 is a plan view of a printed circuit board substrate into which electronic components are inserted.

Fig. 8 is a partial side view of a printed circuit board substrate into which electronic components are inserted.

Fig. 9 is a sectional view of the electronic component before the lead wires are cut.

Fig. 10 is a sectional view showing a state in which the lead lines of the electronic component are cut.

The following describes an embodiment of the present invention with reference to the drawings.

Fig. 1 to 6 show an embodiment of an electronic component mounting apparatus of the present invention.

The electronic component mounting apparatus is composed of an apparatus main body 10 shown in fig. 1 to 3 and a ramp plate 30 shown in fig. 4 to 6, and operates in a state where the ramp plate 30 is mounted in the apparatus main body 10.

As shown in fig. 1, the housing 11 of the apparatus body 10 is a box-shaped case having an opening at an upper portion. A base plate 12 is fixed to the inner wall of the housing 11, and a cylinder 20 is fixed to the lower end face of the base plate 12 by an L-shaped fitting. The cylinder is an air cylinder, and a piston, not shown, is supported on an inner wall of the cylinder 20 to be reciprocatingly movable. The piston is movable back and forth in the left and right directions in fig. 1 by the air pressure in the cylinder. The rod 21 is fixed to the piston. An L-shaped fitting 22 is fixed to the tip of the rod 21. The fitting 22 moves along the longitudinal direction of the rectangular hole 12a provided in the base plate 12 in accordance with the reciprocating movement of the rod 21.

The pair of guide members 25 are provided at a predetermined interval on the upper end surface of the base plate 12, and are relatively provided in parallel in the direction perpendicular to the rod 21 and fixed to the base plate 12 by screws, and the cam plate 24 is fitted between the pair of guide members 25 and can reciprocate in the direction of reciprocating the rod 21, that is, in the direction C, D perpendicular to the direction A, B in fig. 2. A groove 24a is formed in the lower end surface of the cam plate 24 obliquely to the direction of reciprocation of the lever 21, i.e., the direction of A, B in fig. 2, and the pin 23 fixed to the metal fitting 22 is fitted into the cam groove 24 a. A pin 26 projecting upward from an upper end surface of the cam plate 24 is fixed to the upper end surface.

As shown in fig. 2, positioning pins 14 fixed to elongated brackets 13 are provided at four corners of the housing 11. The upper end of the housing 11 in the longitudinal direction as shown in fig. 1 protrudes upward beyond the stay 13.

The two-dot chain line shown in fig. 1, 2, and 3 indicates a state in which the ramp plate 30 is mounted in the apparatus main body 10, the movement of the ramp plate 30 in the direction A, B in fig. 2 is restricted by the housing 11, the movement of the ramp plate 30 in the direction C, D in fig. 2 is restricted by the positioning pin 14, and the moving blade 40 of the ramp plate 30 is sandwiched between the guide plate 31 and the fixed blade 50 as shown in fig. 5 and 6, thereby forming a three-layer structure. The guide plate 41 is held between the guide plate 31 and the fixed blade 50 and fixed to each other by a screw 61, and the movable blade 40 is reciprocally movable in the left-right direction in fig. 4. The slider 42 is inserted into the insertion hole 31a, the fitting hole 40a, and the insertion hole 50a provided in the guide plate 31, the movable blade 40, and the fixed blade 50, respectively, and the movable blade 40 is reciprocated by the pin 26 inserted into the through hole 42a from below.

The guide plate 31 is provided with an insertion hole 31a for reciprocating the slider 42 and receiving

holes

32 and 33 for receiving the printed circuit boards 70 and 80 shown in fig. 4. The cover plate 34 closing the insertion hole 31a from above the insertion hole 31a is fixed by a screw 61. The discharge holes 32a and 33a provided at the four corners of the

accommodation holes

32 and 33 are discharge holes that shorten the processing time of the

accommodation holes

32 and 33. Semicircular holes 32b, 33b are provided on one side of the

accommodation holes

32, 33, and the green sheet pcbs 70, 80 can be easily taken out from the

accommodation holes

32, 33.

The movable blade 40 is held between the guide plate 31 and the fixed blade 50, and its moving direction is guided by the guide plate 41. The moving blade 40 has a fitting hole 40a through which the slider 42 can be inserted to a position corresponding to the insertion hole 31a of the guide plate 31. Further, at positions corresponding to the

receiving holes

32, 33 of the guide plate 31, there are provided blade holes 45 into which lead wires of electronic components can be inserted. The blade 45a is provided at both ends in the moving direction of the inner peripheral edge of the moving blade 40 forming the blade hole 45. Between the blade 45a and the fixed blade 50, the lead wire of the electronic component can be cut to a predetermined length and bent at a predetermined angle.

The slider 42 is composed of a large-diameter portion 43 and a small-diameter portion 44, and has a through hole 42a in the axial direction, and the pin 26 provided on the cam plate 24 can be fitted from below. The upper end surface of the slider 42 is pressed by the cover plate 34 and prevented from falling off from above the inclined plate 30. Further, the lower end surface of the large diameter portion 43 is tied to the upper end surface of the moving blade 40, and the slider can be prevented from falling off from the lower side of the inclined plate 30. The axial length of the slider 42 is slightly larger than the thickness of the guide plate 31, the moving blade 40, and the fixed blade 50, which are overlapped with each other, by providing notches 44a at both ends of the slider 42 in the radial direction of the small diameter portion 44, such that the clearance formed in the moving direction of the moving blade 40 is made extremely small and the slider 42 is fitted in the fitting hole 40 a.

The fixed blade 50 has an insertion hole 50a, and the slider is inserted into the insertion hole 50a at a position corresponding to the fitting hole 40a so as to be reciprocatingly movable. At a position corresponding to the blade hole 45, there is a wire hole 51 through which a lead wire of an electronic component can be passed.

The printed circuit boards 70 and 80 are constituted by 3 printed

circuit boards

71 and 81, respectively. As shown in fig. 7, the green sheet 70 is divided into individual green sheets 71 by removing a frame 72 provided around the green sheet 71. As shown in fig. 8, electronic components 73 such as capacitors and resistors are inserted into predetermined positions of the printed

circuit boards

71 and 81, and lead wires 74 project from the lower side of the printed circuit board 71.

The sequence of mounting the electronic components to the printed circuit board is described below.

(1) The pin 26 is fitted in the through hole 42a of the slider 42, and the inclined plate 30 is mounted in the apparatus body 10. At this time, the movement of the inclined plate 30 in the horizontal direction is restricted by the housing 11 and the positioning pin 14.

(2) The printed circuit boards 70 and 80, into which electronic components are manually inserted, are inserted into the receiving holes 32 and 33 of the guide plate 31 while the lead wires of the electronic components are inserted into the blade holes 45 and the wire holes 51.

(3) When the operator turns ON a start switch not shown in the drawing, the rod 21 is moved back and forth in the direction A, B in fig. 2 by the air pressure in the air cylinder. As the lever 21 is moved back and forth, the pin 23 moves into the cam groove 24a, and the guide plate 25 guides the cam plate 24 to move back and forth in the C, D direction in fig. 2, which C, D direction is perpendicular to the A, B direction in fig. 2, which is the direction in which the lever 21 is moved back and forth. As the cam 24 reciprocates, the moving blade 40 also reciprocates. As the rod 21 reciprocates, the pin 23 moves in the cam groove 24a in the direction a in fig. 2, the cam plate 24 moves in the direction C in fig. 2, and one end of the cutting edge 45a provided at both ends of the cutter hole 45 and the fixed blade 50 cut one end of the lead wire and bend the lead wire toward the other lead wire. The pin 23 is moved in the direction a in fig. 2 and then returned in the direction B, the cam plate 24 is moved in the direction D in fig. 2, and the other end of the blade 45a and the fixed blade 50 cut the other side of the lead wire and bend the other side of the lead wire. Thus, the lead wires protruding from below the printed circuit boards 70 and 80 are cut by the blade edge 45a of the moving blade 40 and the fixed blade 50 so as to protrude slightly from below the printed

circuit boards

71 and 81 as shown in fig. 8, and are bent at a certain angle in directions facing each other. The bent shapes of the lead wires with respect to each other are to prevent the lead wires from coming into contact with the wiring of the circuit board of the printed circuit board base 71 or other incorporated electronic components.

Fig. 9 is a sectional view showing a state where the lead wires 74 are inserted into the printed circuit board 70. When the movable blade 40 is moved in the leftward direction in the drawing from this state, the lead wire 74 on the right side is cut as shown in fig. 10, and the tip of the cut lead wire is bent by the inclined surface 45b formed on the blade 45a as shown in the drawing. Then, the left lead wire 74 in fig. 10 is cut similarly by the movement of the movable blade 40 in the reverse direction, and the cut tip may be bent to the opposite side of the right lead wire.

(4) After the cutting and bending of the lead wires are completed, the green sheets 70 and 80 are taken out from the mounting apparatus. The taken-out green sheets 70 and 80 are divided into green sheets after electronic components are soldered to the green sheets 70 and 80 by solder.

Then, by repeating the operation processes of (2) to (4), the electronic component can be efficiently mounted on the printed circuit board.

In this embodiment, the electronic components are manually inserted into the printed circuit boards 70 and 80, and the operator turns ON the start switch to drive the air cylinder 20. In the present invention, the insertion of the electronic components into the green sheets 70 and 80 and the driving of the air cylinders can also be performed automatically.

In addition, the shape and number of the receiving holes provided in the guide plate of the present invention for receiving the green sheets are changed corresponding to the loaded green sheets. With this change, the positions of the knife holes of the knives, i.e., the moving knife, and the positions of the line holes of the fixed knife also change.

In this embodiment, the air cylinder uses air to drive the piston to move, but in the present invention, other fluids may be used to drive the piston to reciprocate.

In the present embodiment, the blade hole 45 into which the pair of lead wires of each electronic component are inserted together is provided in the movable blade 40, and the movable blade 40 is reciprocated; the lead wires are bent to face each other while being cut. However, in the present invention, when the density of wiring of the printed circuit board or mounting of electronic components is low, the blade holes into which the pair of lead wires of each electronic component are inserted may be provided in the blade, that is, the moving blade, and the lead wires may be bent in opposite directions while being cut by the reciprocating movement of the moving blade.

In the present embodiment, the moving blade 40 moves forward and backward to cut one lead wire; however, in the present invention, the lead wire may be cut by moving the lead wire once.

10 device body

20 cylinder

21 bar

24 cam plate (cam component)

30 inclined plate

31 guide plate

40 Mobile knife (knife)

45 knife hole (through hole)

45a blade

50 fixed knife (knife)

71 printed circuit board

73 electronic component

74 lead-out wire

Claims

1. An electronic component mounting apparatus for mounting electronic components on a printed circuit board, comprising: deflector, fixed sword, removal sword and actuating mechanism, characterized by:

the fixed knife is arranged at the lower side of the guide plate and is provided with a plurality of wire holes into which a plurality of outgoing wires are inserted, and the outgoing wires of the electronic element penetrate through and protrude out of the printed circuit base plate;

the movable knife is flat, is arranged between the guide plate and the fixed knife, can move in parallel, forms a knife part which moves together with the fixed knife and cuts the leading-out wire on the inner side, and is provided with a plurality of knife holes through which the leading-out wire passes;

the driving mechanism makes the movable knife move in parallel

2. An electronic component mounting apparatus as claimed in claim 1, wherein: an inclined surface facing a side surface of the guide plate is formed at the blade portion of the blade hole, and the lead wire is bent by the inclined surface.

3. An electronic component mounting apparatus as claimed in claim 1, wherein: the blade portions are formed at both ends of the blade hole in the moving direction of the movable blade.

4. An electronic component mounting apparatus as claimed in claim 3, wherein: the driving mechanism moves back and forth in order in both the one direction and the other direction along the moving direction of the moving blade, and the blade portion on the one side cuts at least one of the lead wires when moving in the one direction, and the blade portion on the other side cuts at least the other lead wire when moving in the other direction.

5. An electronic component mounting apparatus as claimed in claim 4, wherein: the driving mechanism is provided with a cylinder and a cam mechanism, wherein the cylinder is provided with a rod which is driven to stretch and retract in the axial direction; the cam mechanism is provided between the cylinder and the movable blade, and converts a stroke of the rod in either one of an extending direction or a retracting direction into a reciprocating movement of the movable blade.

6. An electronic component mounting apparatus as claimed in claim 5, wherein: the cam mechanism has a cam plate and a connecting pin, and the cam plate is provided with a cam groove extending obliquely with the extension direction of the rod and connected with the movable knife; the pin is inserted into the cam groove and connected to the lever.

7. An electronic component mounting apparatus as claimed in claim 1, wherein: the driving mechanism is provided with a cylinder and a cam mechanism, wherein the cylinder is provided with a rod which is driven to stretch and retract in the axial direction; the cam mechanism is provided between the cylinder and the movable blade, and converts a stroke of the rod in either one of an extending direction or a retracting direction into a reciprocating movement of the movable blade.

8. An electronic component mounting apparatus as claimed in claim 7, wherein: the cam mechanism has a cam plate and a connecting pin, and the cam plate is provided with a cam groove extending obliquely to the extension and retraction direction of the rod and connected with the movable knife; the pin is inserted into the cam groove and connected to the lever.

9. An electronic component mounting apparatus as claimed in claim 1, wherein: the guide plate, the fixed blade, and the movable blade are fixedly connected to each other, and may be clutched to the driving mechanism as a ramp plate.

10. An electronic component mounting apparatus as claimed in claim 1, wherein: the movable knife is provided with a connecting member which is arranged on the driving mechanism in a protruding manner and can be disengaged with a pin driven to reciprocate by the driving mechanism.