JP2538494B2 - Chip component mounting device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip component mounting apparatus for automatically mounting chip components on a printed circuit board. The density of the component supply section is increased to shorten the length of the chip component mounting apparatus. The moving parts can be made lighter and the operation speed can be increased.

[0002]

2. Description of the Related Art A large number of component supply units are arranged in a row along a conveyor line along which a print substrate is sequentially conveyed, and a chip component of each component supply unit is provided by a suction nozzle of a suction head that moves in the X and Y directions. There is known a chip component mounting apparatus for adsorbing an adsorbed chip component, correcting the position and direction of the adsorbed chip with respect to the adsorption nozzle by a correction arm, and mounting the adsorbed chip component at a predetermined position on the print substrate on the conveyor (JP-A-59). -87900). In the known chip component mounting device, the component supply units are arranged in a line along the conveyor line, and the mounting head can be moved in the X and Y directions on the support mechanism disposed on the opposite side of the component supply unit across the conveyor. Since the number of chip components increases, the total length of the chip component mounting apparatus also increases and the moving length of the mounting head also increases, which lowers work efficiency. Even if it is attempted to arrange the component providing units on both sides of the conveyor line in order to avoid the increase in the total length of the chip component mounting apparatus, this is impossible due to this mechanism. Further, in the chip component mounting device, an intermittent feeding mechanism for the component supply unit for intermittently pulling out the adhesive tape to which a large number of chip components are temporarily fixed each time one chip component is moved from the component supply unit onto the printed board. However, in the above-mentioned conventional technique, the actuator 72 fixed to the outside of the mounting head 3 (see the above-mentioned publication, the same applies to the following in this section) and the lever 7 at the tip thereof.
The intermittent feed mechanism of the component supply unit is driven intermittently by means of 3. For this reason, the weight of the intermittent drive mechanism is large, and therefore the inertia of the entire moving portion that moves in the X and Y directions is large, which is one of the reasons for increasing the speed of operation of the chip mounting device. It is an obstacle.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art, and it is possible to arrange the chip component supply parts on both sides of the conveyor line, and to further elevate and lower the drive mechanism of the suction head. It is an object of the present invention to devise so that the intermittent driving can be performed by omitting the actuator for the intermittent driving, thereby reducing the weight of the moving portion.

[0004]

[Means for Solving the Problems] The measures taken for solving the above problems are constituted by the following elements (a) to (g). (A) A guide rail orthogonal to the transport path and a frame parallel to the transport path are provided above the transport path to attach the suction head to the X,
It is supported so as to be movable in the Y direction. (B) A pair of parts supply in which the shaft member is arranged so as to face each other on a straight line that is oblique to the carrying direction of the carrying path and passes through the center of the shaft member. Supporting the operating means on the head body of the suction head so as to be able to move up and down; (c) connecting the upper parts of the pair of component supply operating means to the upper part of the shaft member by a connecting member; and (d) contacting the connecting member. The head main body is provided with stopper means for contacting and restricting the descending ends of the shaft member and the component supply operating means, and (e) the chip feed mechanism is operated by one of the pair of component supply operating means that moves up and down together. (F) The pair of component supply operating means also serves as a guide shaft for the vertical movement of the shaft member. When the mounting means descends to the position for adsorbing the chip component, the pair of component supply actuating means is elevated and lowered together with the shaft member by the elevating and lowering drive means of the shaft member, and the descending and ascending operation of the component supply actuating means moves the chip feed mechanism Only pitch feed is activated.

[0005]

[Operation] The guide rails and frames in the X and Y directions are provided above the transport path (conveyor line) in a state of straddling them. Since the suction heads travel on the frames, the suction head moves across the conveyor lines. Then, the component supply parts arranged on both sides of the conveyor line can be accessed without any trouble from above. Also,
The shaft member is sandwiched and opposed on a straight line that is oblique to the transport direction of the transport path (conveyor line) and passes through the center of the shaft member (at the lower end of the shaft member, the suction nozzle that is the suction means). The pair of component supply operation means arranged are driven up and down by the lifting drive means of the suction nozzle. By the ascending / descending operation of the pair of component supply operating means, any one of them drives the chip feed mechanism of the chip component supply unit arranged on both sides of the conveyor line intermittently. Further, since the upper portions of the pair of component supply operating means are connected to the upper portion of the shaft member by the connecting member, the pair of component supply operating means drive the shaft member by the elevating and lowering drive means and the suction operation of the suction nozzle together with the shaft member. Since the chip feed mechanism of the chip component supply unit is intermittently driven each time, it is not necessary to provide a special drive means and timing control means for intermittently driving the chip feed mechanism. ,Also,
Since the coupling mechanism between the pair of component supply actuating means and the shaft member is simple, the weight of the guide rail and the moving portion that moves along the frame is reduced accordingly, and thus the chip component supply device is lightened. Since this weight reduction reduces the inertial mass for starting and stopping the chip component supply operation, it can be started and stopped quickly, and the operating speed of the chip component supply operation can be improved. Further, since the upper part of the pair of component supply operating means is connected to the upper part of the shaft member and the pair of component supply operating means also serves as the guide shaft, the guide for the shaft member is extremely stable, and the suction nozzle at the lower end thereof is provided. It is possible to suppress the deviation of the position of as much as possible.

[0006]

EXAMPLES Next, examples will be described with reference to the drawings. On a top surface of the cabinet 1 (see FIG. 11), a conveyor 2 that conveys a print substrate is horizontally arranged, and a print substrate 3 is intermittently conveyed from one side of the conveyor 2. When it reaches the component mounting position P ₁ , it is temporarily stopped. A frame 4 is arranged above the conveyor 2, and the frame 4 is guided by guide rails 5 and 5 which are orthogonal to the conveyor 2 and in a horizontal plane parallel to the conveyor 2 in a direction orthogonal to the conveyor 2, that is, Y Is reciprocated in the direction. And
A lead screw 6 parallel to the guide rails 5 and 5 is screwed into one end of the frame 4, and the lead screw 6 is rotated by a motor 7 to feed the frame 4 in the Y direction. To be Further, the frame 4 has a head support portion 8
The head support portion 8 is guided by a guide rail 9 along the conveyor 2 and reciprocates in the X direction along the feeding direction of the conveyor 2. A lead screw 10 parallel to the guide rail 9 is screwed into the head support portion 8. By rotating the lead screw 10 with a motor 11, the head support portion 8 is fed in the X direction. Therefore, the head supporting portion 8 is moved to an arbitrary position in the horizontal plane parallel to the conveyor 2 in cooperation with the feeding of the frame 4 in the Y direction. On the other hand, in the cabinet 1, the conveyor 2 is sandwiched between the cabinet 1 and both sides thereof, and
Is provided. In the component supply unit 12 of this embodiment, a large number of chip components 14 each having, for example, a rectangular parallelepiped shape are attached to an adhesive tape 13 wound on a reel at equal intervals. A ratchet type feeding mechanism for intermittently feeding the tape is incorporated (see FIG. 2). The feed mechanism 16 includes an input wheel 1 having a ratchet wheel 17 and a pawl 18 hooked on the ratchet wheel 17.
9, the pawl wheel 17 is rotated integrally with a feed wheel (not shown) that meshes with the feed hole of the adhesive tape 13. Then, the input wheel 19 is rotated by a certain angle in the direction of arrow A by pushing the push rod 20 downward, and is then pulled back by the spring 21. At this time, the ratchet wheel 17 is moved through the pawl 18 in the direction of arrow B. Rotate by a certain angle. By the rotation of the ratchet wheel 17, the adhesive tape 13 is fed at a constant pitch in the direction of the arrow, and the tip part 14 of the adhesive tape 13 is positioned at the suction position P ₂ . The component supply units 12 are arranged on both sides of the conveyor 2 (see FIG. 10), and the suction positions P ₂ of the component supply units 12 on both sides are arranged along the conveyor 2. By the way, three suction heads 22 are arranged in parallel on the head support portion 8. The suction head 22 transfers the chip component 14 located at the suction position P ₂ to a predetermined position on the print substrate 3 at the chip component mounting position P ₁ . The head body 23 is supported by the head support portion 8, and a mounting hole 25 having a diameter larger than that of the cylinder 24 is coaxially formed in the head body 23 along the vertical direction. A cover member 26 for closing the upper end opening of the cylinder 24 is attached, and an intermediate member 27 for closing the lower end opening of the cylinder 24 is fitted in the mounting hole 25. Mounting hole 25
A cylindrical guide 30 is coaxially supported on the inner side of the shaft via a sleeve 28 and a bearing 29.
The lower end of 0 is led out below the mounting hole 25. A hollow shaft member 31 is coaxially inserted through the cylinder 24 and the guide 30. The shaft member 31 of the present embodiment has a double structure in which an outer shaft 32 and an inner shaft 33 are axially slidably fitted, and a vacuum passage 34 is provided inside the inner shaft 33 along the axial direction. Has been formed. The upper end of the shaft member 31 penetrates the end member 26 and is led out upward, and the upper end of the inner shaft 33 protrudes higher than the outer shaft 32. Bearing 3
The end cap 36 is fitted in via 5. The vacuum passage 34 in the inner shaft 33 communicates with a vacuum pump 39 via a hose 37 connected to the end cap 36 and a communication passage 38 in the head body 23. Further, the lower end portion of the inner shaft 33 is led out to a lower side than the outer shaft 32, and the outer periphery of this lead portion is
A rubber damper 40 that receives the outer shaft 32 at a position axially separated from the lower end surface of the outer shaft 32 by a distance L _1.
Has been fixed. A suction nozzle 41 that sucks the chip component 14 is mounted inside the lower end opening of the vacuum passage 34 that opens to the lower end surface of the inner shaft 33. The suction nozzle 41 is fitted so as to be vertically movable in the axial direction. And is biased downward by the coil spring 42. When the size or shape of the chip component 14 changes, the height change is compensated by expansion and contraction of the coil spring. The cylinder 24 is provided around the outer shaft 32.
A piston 45 that divides the interior into an upper chamber 43 and a lower chamber 44
(Elevating drive means) is attached. These upper chamber 43 and lower chamber 44 are provided with air supply paths 47, 4 respectively.
7 to the air pumps 46, 46, and by switching the supply of air to the upper chamber 43 or the lower chamber 44, the outer shaft 3 together with the piston 45.
2 is raised and lowered. Further, two guide shafts 51, 51 that guide the up-and-down movement of the inner shaft 33 are connected to the bracket 50 (connecting member) provided on the end cap 36. The guide shafts 51, 51 face each other across a virtual straight line that passes through the center of the suction head and are parallel to the conveyor line, and also pass through the center of the suction head and are arranged on a straight line that is inclined with respect to the virtual straight line. The guide shaft is supported by the head body 23 of the suction head 22 so as to be able to move up and down, the lower end of which extends below the shaft member 31, and the lower end of one of the guide shafts is the suction head 22.
Is positioned at the suction position P ₂ , the feed mechanism 16
Of the pressure rod 20. The inner shaft 3
3 and the guide shafts 51, 51 are the return spring 5
It is urged upwards via 2. An adjusting screw 53 for stroke adjustment is screwed into the end member 26 through which the shaft member 31 penetrates. The upper portion of the adjusting screw 53 penetrates the bracket 50 in the vertical direction, and the adjusting screw 53 is in contact with the upper surface and the lower surface of the bracket 50 and restricts the stroke length of the inner shaft 33 and the guide shafts 51, 51. 54 and 55 are attached. The stopper 55 that abuts the lower surface of the bracket 50 is
It is provided at a position separated from the lower surface by a distance L ₂ , and the distance L ₂ is from the lower end surface of the outer shaft 32 to the damper 40.
Is set to be larger than the distance L ₁ between Therefore, when the lower end of the outer shaft 32 comes into contact with the damper 40 of the inner shaft 33, the outer shaft 32 is prevented.
And the stroke amount L of the outer shaft 32 and the piston 45 becomes L ₁ + L ₂ . Further, the outer peripheral surfaces of the outer shaft 32 and the inner shaft 33 are flatly cut at a portion penetrating the guide 30, and the flat surfaces 32 of the both shafts 32 and 33 are formed.
a and 33a have the same flat surface (see FIG. 6). A detent pin 57 that is in rolling contact with the flat surfaces 32a and 33a is axially supported by the guide 30, and the detent pin 57 allows the guide 30, the outer shaft 32, and the inner shaft 33 to move in the axial direction. Although it is relatively slidable relative to the shaft, it is integrally connected in the axial direction. A piston rod 63 of an air cylinder 62 is connected to an outer peripheral portion of the guide 30 via a joint 60, and the guide rod 30, the outer shaft 32, and the inner shaft 33 are, for example, in a range of 90 degrees when the piston rod 63 appears and retracts. It is rotated integrally inside. By the way, at the lower end of the guide 30, four correction arms 63 for positioning the chip component 14 sucked by the suction nozzle 41 are provided.
a, 63b and 64a, 64b are arranged at equal intervals in the circumferential direction. These correction arms 63a, 63b and 64a, 64b are a set of two that oppose each other in the radial direction. Is rotatably supported in the radial direction. And
A sandwiching piece 67 that sandwiches two opposite surfaces of the chip component 14 is fixed to the lower ends of the correction arms 63a, 63b, 64a, 64b, and the upper end of the sandwiching piece 67 is more radial than the guide 30. A lever portion 68 protruding outward is integrally formed. Such a correction arm 63a,
63b, 64a, 64b are located so as to surround the outer side of the shaft member 31, and the outer shaft 32 descends on the surfaces facing each other with the shaft member 31 interposed therebetween.
The cam portion 6 in contact with the outer peripheral surface of the lower end portion of the outer shaft 32
9 is projected. The lower end of the outer shaft 32 has a small-diameter conical taper, and when the conical taper comes into contact with the cam portion 69, the correction arms 63a, 63b, 64 are formed.
The lower ends of the a and 64b are expanded outward in the radial direction. A sleeve 70 for biasing the correction arms 63a, 63b, 64a, 64b in a closing direction is fitted on the outer peripheral surface of the lower end portion of the guide 30 so as to be slidable in the axial direction. The sleeve 70 includes one pair of correction arms 63a, 6a.
3b is interlocked with an inner sleeve 71 and the other correction arm 64a, 64b is interlocked with an outer sleeve 72 to form a double structure.
The lower end portion is urged downward by 3 and abuts against the lever portion 68. In this case, the inner sleeve 7
At the lower end of 1, the other set of correction arms 64a, 64b
A recess 74 is formed to allow the lever part of the outer sleeve 72 to escape, and a recess 75 is formed at the lower end of the outer sleeve 72 to allow the lever part of one of the correction arms 63a and 63b to escape. The correction arms 63a, 63b and 64a, 64b are biased in the closing direction independently for each set. The correction arms 63a, 63b, 64
a and 64b include the inner shaft 33 when they are closed.
A damper 80 that comes into contact with the outer periphery of the lower end of the is attached.
This damper 80 is provided with a correction arm 6 via a coil spring 81.
3a, 63b, 64a, 64b are mounted so as to be slidable in the opening / closing direction.
The shock when the chip component 14 sandwiches the chip component 14 is absorbed and relaxed. The operation of the above mechanism is as follows. When the suction head 22 stops at the suction position P ₂ due to the movement of the head support portion 8 in the X and Y directions, air is supplied from the air pump 46 to the upper chamber 43, and the outer shaft 32 and both guide shafts 51, 51 move. Start descent. Due to the lowering of the outer shaft, the conical taper on the outer peripheral surface of the lower end of the outer shaft 32 abuts on the cam portion 69, and the correction arm 63
The a, 63b, 64a and 64b start to open simultaneously against the biasing force of the sleeves 71 and 72. Then, when the outer shaft 32 comes into contact with the damper 40, the inner shaft 33 also starts to descend integrally, the suction nozzle 41 projects downward from between the sandwiching pieces 67, and both guide shafts 51, 51.
One of them pushes down the push rod 20 to rotate the input wheel 19 of the feed mechanism 16 against the spring 21 by a predetermined angle. When the inner shaft 33 is stroked to the lowest position and the suction nozzle 41 sucks the chip component 14, the upper chamber 43 is exhausted, and at the same time, the lower chamber 44 is supplied with air from the air pump 46. Air is supplied from the air pump 46 into the lower chamber 44. As a result, the shaft member 31 including the outer shaft 32 and the inner shaft 33 rises, the chip component is peeled off from the adhesive tape, and first, the inner shaft 33 provided with the suction nozzle 41 stops. Further, the outer shaft rises, whereby the correction arms start to gradually close at the same time, and eventually, the sandwiching pieces 67 pinch the side surfaces of the chip component from the directions orthogonal to each other to stop the outer shaft. The sandwiching pieces 67 sandwich the side surfaces of the chip component from the directions orthogonal to each other, whereby the chip component is positioned in the width direction and the longitudinal direction with respect to the suction nozzle 41, that is, the chip component is aligned with the suction nozzle (FIG. 8 and FIG. 9). This inner shaft 33
As the guide shafts 51, 51 ascend with the rise of the push rod 2, the push rod 2 that was pushed down by one of them.
0 is released, the input wheel 19 of the feed mechanism 16 is rotated counterclockwise by the spring 21, and the pawl wheel 17 is rotated counterclockwise by a predetermined angle via the ratchet pawl 18 to move the next chip component to the suction position. Send out and prepare for the next suction operation. Next, the head support portion 8 moves again in the X and Y directions, the suction head 22 sucking the chip component moves to a predetermined position on the printed board at the chip component mounting position P ₁ and is stopped at that position. Then, by the air cylinder 62, the suction nozzle 41 and the correction arms 63a, 6
3b, 64a, 64b are integrally rotated within the range of 90 degrees, and the mounting direction of the chip component 14 is selected. Subsequently, when the air is supplied to the upper chamber 43 at the same time as the exhaust in the lower chamber 44 and the shaft member 31 starts descending, the correction arms 63a, 63b, 64a, 64b start to open again and are sucked by the suction nozzle 41. The chip component 14 is placed at a predetermined position on the printed board 3 (see FIG. 7) and fixed by the adhesive B (see FIG. 7). Although the guide shaft is used as a driving means for intermittently driving the input wheel 19 of the feed mechanism 16, in addition to this, the chip components adhered to the adhesive tape that is sequentially fed out may be removed from the tape due to vibration of the tape or the like. In order to prevent this, the guide shaft is also used as the opening / closing drive means of the shutter for temporarily covering it, so that the drive means can be further saved.

[0007]

[Effects] The above-mentioned object of the present invention is novel. Therefore, the solution of this novel problem and the solution of the above-mentioned problems of the prior art is the effect peculiar to the present invention. That is,
The suction head can move to both sides across the conveyor line, is provided on the suction head, passes through the center of the shaft member that sucks the chip component, and on a straight line oblique to the transport direction of the transport path. Further, since a pair of component supply operating means arranged so as to face each other with the shaft member sandwiched therebetween are supported by the suction head main body so as to be able to move up and down, thereby operating the component supply section, the same type of component supply section is By arranging the component suction positions on both sides of the conveyor line, it is possible to access the same suction heads to the component supply units placed on both sides of the conveyor line, and the aggregate density of the component supply units for one suction head. Can be significantly improved. Therefore, it is possible to configure the chip component mounting apparatus that mounts a great variety of chip components on the printed circuit board to a relatively small size without increasing the overall length. In addition, since the component supply operation means is driven up and down by the lift drive mechanism for the shaft member (the suction nozzle is located at the lower end of the shaft member), it is not necessary to provide special drive means and timing control means for driving the component supply section. Further, since the upper part of the shaft member is connected to the upper parts of the pair of component supply operating means through the connecting member, the drive mechanism for driving the pair of component supply operating means by the drive means of the shaft member becomes an extremely simple mechanism. . Therefore, the increase in the weight of the moving part can be suppressed as much as possible, and the weight of the moving part can be reduced to start it.
The inertial force of the stop can be reduced, and the response speed can be improved thereby, so that the operation speed of the chip component supply operation can be improved. Further, since the upper part of the pair of component supply operating means is connected to the upper part of the shaft member and the pair of component supply operating means also serves as the guide shaft, the guide for the shaft member is extremely stable, and the suction nozzle at the lower end thereof is provided. It is possible to suppress the deviation of the position of as much as possible. Furthermore, when a separate actuator is used as the drive means of the feed mechanism of the chip component supply device, as in the above-mentioned prior art or the one disclosed in Japanese Patent Laid-Open No. 60-97700, this operation is performed by other means such as a suction head. However, since the present invention drives the component supply unit by the piston that drives the suction head up and down, the operation of the suction head and the operation of the component supply operating means are mechanically linked. Therefore, the sequence control for that is not necessary, and the control circuit becomes simpler. Moreover, the drive mechanism is significantly simpler than these. This is also a great advantage of the present invention. Further, the head body of the suction head is provided with the stopper means for abutting against the connecting member connecting the upper part of the component supply operating means and the upper part of the shaft member to restrict the descending ends of the shaft member and the component supply operating means. By adjusting the single stopper means, the position of the lower end of the lifting stroke of the suction means (suction nozzle) below the shaft member and the position of the lower end of the lifting stroke of the lower ends of the pair of component supply operating means are adjusted. Can be adjusted at the same time. That is, conventionally, the work of adjusting the lower end position of the lifting stroke of the suction means at the lower part of the shaft member to the component suction position and the lower end position of the lower stroke of the component supply operating means to the operating position of the chip feeding mechanism. It was necessary to perform the adjustment work separately, but by adjusting the vertical position of the shaft member while the relationship between the component suction position and the vertical position of the chip feed mechanism is preset, the component supply operation is performed at the same time. Since the ascending / descending position of the lower end of the means is adjusted, it is not necessary to make both adjustments separately.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a suction head.

FIG. 2 is a side view of a suction head.

FIG. 3 is an enlarged sectional view of a suction nozzle and a correction arm.

FIG. 4 is a view on arrow U in FIG.

FIG. 5 is a perspective view of a correction arm and a suction nozzle.

6 is a cross-sectional view taken along line VV of FIG.

FIG. 7 is a cross-sectional view of the suction nozzle in the most lowered state.

FIG. 8 is a cross-sectional view of a chip component in a positioned state.

9 is a view on arrow W of FIG. 8. FIG.

FIG. 10 is a plan view of the entire device.

FIG. 11 is a front view of the entire apparatus.

[Explanation of symbols]

2 ... Conveyor (conveyance path) 3 ... Print substrate 8 ... Head support 12 ... Component supply unit 14 ... Chip component 16 ... Feed mechanism 20 ... Push rod 22 ... -Suction head 30 ... Guide 31 ... Shaft member 32 ... Outer shaft 33 ... Inner shaft 41 ... Suction means (suction nozzle at the lower end of the shaft member) 45 ... Piston (elevation drive means) ) 50 ... Bracket (connecting member) 51 ... Guide shaft (parts supply operating means) 63a, 63b, 64a, 64b ... Correcting arm 68 ... Lever portion 69 ... Cam portion 70 ... Sleeve P ₁・ ・ ・ Mounting position of chip parts P ₂・ ・ Suction position of chip parts

Claims (1)

(57) [Claims] 1. A large number of component supply units are arranged along both sides of a transport path along which a print substrate is sequentially transported,
A shaft member is supported by a head body of a suction head that moves in the X and Y directions so as to be able to move up and down. The suction means below the shaft member sucks the chip component of each component supply unit and the suction means of the suctioned chip component In the chip component mounting device that corrects the position and direction and mounts the chip component that is adsorbed to the specified position of the printed circuit board on the transport path, a guide rail orthogonal to the transport path and a frame parallel to the transport path are provided above the transport path. A pair of parts that support the suction head so as to be movable in the X and Y directions, and that are arranged so as to face each other across the shaft member on a straight line that passes through the center of the shaft member and that is oblique to the transfer direction of the above-mentioned transfer path. The supply operating means is supported on the head body of the suction head so as to be able to move up and down, and the upper portions of the pair of component supply operating means are connected to the upper portion of the shaft member by a connecting member. Then, the head main body is provided with stopper means for contacting the connecting member and restricting the descending ends of the shaft member and the component supply operating means, and the chip feed mechanism is operated by either one of the pair of component supply operating means that moves up and down together. The pair of component supply actuating means also serves as a guide shaft for the vertical movement of the shaft member, and when the shaft member descends to a position where the suction means under the shaft member sucks the chip component, the pair of component supply A chip component mounting apparatus in which an operating means moves up and down together with a shaft member by a shaft member ascending / descending drive means, and the chip feeding mechanism is operated by one pitch feed by the descending and ascending operations of the component supply operating means.