JP2000114784A - Electronic part mounter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic part mounter in which correct acceleration control can be effected without requiring a dedicated servo motor, a printed board can be carried in or out correctly, high speed operational is accomplished without imparting an inadvertent impact to a printed board or an the part mounter, and the time required for replacing the printed board is shortened without complicating the structure or increasing the manufacturing cost. SOLUTION: When an X moving table 35 is moved from the carry-in conveyor 10 side to the carry-out conveyor 20 side, the carry-in conveyor 10 is pushed by an air cylinder 17 to follow up the X moving table 35. The carry-out conveyor 20 having an air cylinder 27 in free state is pushed by the X moving table 35 to move and a transfer arm 51 moving while enlarging the motion of the carry-in conveyor 10 feeds a printed board 5 in the carrying direction thus replacing a new printed board and a mounted printed board at a breath.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an XY table for mounting and moving a printed circuit board and positioning a predetermined position on the printed circuit board at a mounting position in an apparatus having a mounting position for automatically mounting electronic components. And a device for loading and unloading a printed circuit board to and from an XY table.

[0002]

2. Description of the Related Art Conventionally, as a means for loading and unloading a printed circuit board to and from an XY table in an electronic component mounting apparatus, X means has been used.
A carry-in conveyor is provided on the upstream side for carrying the printed circuit board into the Y table, and a carry-out conveyor is provided on the downstream side for carrying out the printed circuit board from the XY table. The printed circuit board is placed or not moved and is moved in the XY directions. When the XY table and the means for loading and unloading the printed circuit board are prevented from interfering with each other, that is, the loading and unloading conveyors are raised with respect to the XY table to avoid them, or the loading and unloading conveyors are unloaded. The portion where the printed circuit board of the XY table is placed on the conveyor is lowered to avoid it. When loading and unloading the printed circuit board, the XY table is moved in the XY direction to the printed circuit board loading and unloading position, and then is loaded. A part on which a conveyor, an unloading conveyor, and a XY table printed circuit board are placed, and a printed circuit board provided for each Feed rail and connected to the lift to be the same height, simultaneously constituting the unloading of loaded printed board and loading of the new printed circuit board using a conveyor belt or the transfer arm is known.

[0003]

In the above-mentioned conventional electronic component mounting apparatus, the carry-in conveyor, the carry-out conveyor, the portion on which the printed board of the XY table is mounted, and the transfer rail of the printed board are at the same height. Connect by raising and lowering, but wait for the XY table to move to the printed board loading / unloading position in the XY directions, and then place the loading conveyor, unloading conveyor, the XY table printed circuit board mounting part and the printed board The transport rails must be connected by raising and lowering so that they are at the same height.
The time to wait for the Y table to move to the printed board loading / unloading position, and the time to elevate and lower the loading conveyor, the unloading conveyor, the portion on which the printed board of the XY table is placed, and the printed board transport rail to be at the same height. This is necessary in addition to the time for replacing a printed circuit board, which simultaneously carries in a new printed circuit board and unloads a mounted printed circuit board.
In addition, when the carry-in conveyor and the carry-out conveyor rise and avoid the XY table, or when the portion on which the printed circuit board of the XY table is placed with respect to the carry-in and carry-out conveyor descends and avoids. There is a limit to the operating speed to avoid the impact of the ascending or descending operation, and it takes time for the operation, and the XY table starts moving to the loading / unloading position of the printed circuit board and shortens the board replacement time until the replacement of the printed circuit board is completed. Is difficult.

[0004] With regard to a configuration in which a new printed circuit board is carried in and a mounted printed circuit board is carried out simultaneously by using a conveyor belt or a transfer arm, a conveyor belt rotation driving means by a general induction motor, and a transfer arm of a transfer arm by an air cylinder. With the movement driving means, acceleration of rotation and movement is insufficiently controlled, and there is a limit to speeding up operation within a range in which loading and unloading of a printed circuit board can be performed accurately. It is known that a servomotor is used as a driving means capable of performing accurate acceleration control, but it is difficult to apply the servomotor because the entire configuration is inevitably complicated and expensive.

[0005] It is an object of the present invention to provide equivalent and accurate acceleration control without providing a servo motor in particular, and to carry out loading and unloading of a printed circuit board accurately and without giving an unexpected impact to the printed circuit board. It is an object of the present invention to provide an electronic component mounting apparatus which has a high speed, does not require a complicated and expensive apparatus, and has a short board replacement time.

[0006]

In order to achieve the above object, an invention according to a first aspect of the present invention is directed to an X-axis linear guide parallel to the X-axis direction of a printed circuit board and fixed to a base. An X-moving table that can move the X-axis linear guide in the X-axis direction by driving the X-axis motor; The Y-axis linear guide can be moved in the Y-axis direction by driving the guide and the Y-axis motor, and can be moved in the XY direction by being combined with the movement of the X-movement table. A board mounting portion for mounting the printed circuit board surface in a direction perpendicular to the mounting device elevating direction, a carry-in conveyor that is movable in the X-axis direction and transfers the printed circuit board from the upstream side to the receiving board mounting portion, and a carrying-in conveyor; Move in the X-axis direction with the contact part provided on the conveyor. An unloading conveyor that freely receives a printed circuit board from the substrate mounting unit and sends it downstream, a contact unit provided on the unloading conveyor, and a transfer arm that is slidable in the X-axis direction with an arm guide fixed to the infeed conveyor. And transmission means for moving the transfer arm to a distance determined by the product of the distance that the carry-in conveyor moves in the X-axis direction and the transmission ratio; and a hole in a printed circuit board provided in the transfer arm and received by the carry-in conveyor from the upstream side. The electronic component mounting apparatus is provided with transfer pins that enter and exit, and a unit that is provided on the transfer arm and that pushes a printed circuit board, on which the substrate mounting unit is mounted, onto a carry-out conveyor.

According to the second aspect of the present invention, when the XY moving table is X
When moving in the Y direction, the carry-in conveyor is moved upstream to avoid the carry-out conveyor moving downstream, and the carry-in conveyor is received from the upstream side and fits the transfer pins into holes in the printed circuit board at a predetermined position, When the replacement operation of the printed circuit boards is started, the contact portion provided on the unloading conveyor moves in a direction contacting the X moving table, and the XY movement is performed from the loading conveyor to a position where the substrate mounting portion receives the printed circuit board. The table moves, the X table is moved to the carry-in conveyor side, and slightly contacts the contact portion provided on the carry-in conveyor, and then the carry-in conveyor exerts a force in the direction of pushing the X table to carry out. The transfer conveyor follows the X move table by moving the X move table from the carry-in conveyor side to the carry-out conveyor side after applying no force to push the X move table. Means for transferring, the unloading conveyor is pushed by the X moving table and moves integrally, the transmission means moves the transfer arm, and the printed board on which the substrate mounting part is mounted is pushed out to the unloading conveyor, 2. The electronic component mounting apparatus according to claim 1, wherein the transfer pins for mounting the printed circuit board on the carry-in conveyor and the transfer pins for mounting the printed circuit board on the board mounting portion move at the same time to execute the operation of replacing the printed circuit board.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electronic component mounting apparatus according to the present invention will be described below with reference to the drawings.

FIG. 6 shows an example of an electronic component mounting apparatus 60 provided with conventional means for loading and unloading a printed circuit board to and from an XY table, 61 is an index table, 62 is a mounting head, and 65 is an XY table. The XY table 65 is provided with a substrate mounting portion 67 on which a printed circuit board is mounted, and the XY movable base is placed on the XY moving table 63 with respect to the main frame 63.
It is movable in the Y direction, 64 is a conveyor for carrying in the printed circuit board, 66 is a conveyor for carrying out the printed circuit board, and the carry-in conveyor 64 and the carry-out conveyor 66 are arranged on the board mounting portion 67 of the XY table 65. In a raised state, the XY moving table of the XY table 65 secures a predetermined range in which the XY moving table moves in the XY directions. The printed circuit board sent from the previous process is taken into the carry-in conveyor 64 and waits.
After the XY moving table of the XY table 65 is moved to the printed board carry-in / carry-out position, the carry-in conveyor 64 and the carry-out conveyor 66 are moved down and connected to the board mounting portion 67 of the XY table 65, and Conveyor 6 for unloading
Reference numeral 6 denotes a conveyor belt for supporting and transporting both sides of the printed circuit board, and a substrate mounting portion 67 supports both sides of the printed circuit board by a transport rail, and a transfer arm (not shown) pushes in the transport direction to load and mount a new printed circuit board. The completed printed circuit board is unloaded at the same time, and the new printed circuit board is fixed at a predetermined position on the board mounting portion 67. Reference numeral 69 denotes a component supply unit having a plurality of electronic component supply devices. A plurality of mounting heads 62 are attached at equal intervals to the periphery of the index table 61. The mounting head 62 is rotated by intermittent rotation of the index table 61. The printed board moves intermittently, picks up the electronic component from the component supply unit 69, and reaches the mounting position on the board mounting unit 67. The printed board is fixed to the board mounting unit 67 of the XY table 65, moves in the XY directions, and prints. When a predetermined position on the substrate is positioned at the mounting position, the mounting head 62 mounts the picked-up electronic component (the mounting head 62 as mounting means moves up and down).

FIG. 1 is a plan view showing an XY table 30 and a configuration for loading and unloading a printed circuit board 5 from and to an XY table 30 as an example of embodying the present invention. When the carry-in conveyor 10, the carry-out conveyor 20, and the XY table 30 are provided in the electronic component mounting apparatus 60 shown in FIG. 6, for example, the carry-in conveyor 10 is replaced with the carry-in conveyor 10 instead of the carry-in conveyor 64 on the main frame 63. And the XY table 30 instead of the XY table 65. In the case of the electronic component mounting apparatus 60, FIG.
Is a plan view seen from the direction of the mounting head 62 in a direction perpendicular to the printed circuit board 5 on the board mounting portion 47. Even if the electronic component mounting apparatus 60 is of a type different from that illustrated, the basic configuration is the same as the plan view There is no significant difference. The example is applied to a well-known electronic component mounting apparatus even if the electronic component mounting apparatus 60 is used.

As with the base 68 on the XY table 65 in FIG. 6, the XY table 30 in FIG. 1 may also be provided with a base, or the upper surface of the main body frame 63 may be used as a base without a separate base. 1, and therefore, in the plan views shown in FIG. 1 and FIGS. 3 to 5, the base is omitted. Straight guide 31
The linear guide 32 and the linear guide 32 are fixed on the main body base 63 in parallel with the transfer direction (X-axis direction) of the printed circuit board 5, and the linear guide 31 is slidable only in the axial direction.
A guide block 33A and a guide block 34A, 34B slidable only in the axial direction of the linear guide 32 are provided, and the guide blocks 33A, 33B, 34A, 34B are fixedly mounted on the X move table 35, respectively. Is the linear guide 31,
Guide blocks 33A, 33B, 34 that can slide on
A and 34B are movable in the X-axis direction. The screw shaft 40 is rotatably supported by bearings 41A and 41B fixed on the main body base 63, and the motor 38 is fixed on the main body base 63 via a fixture (not shown).
The rotation output shaft 8 is connected via a rotary joint so that the shaft centers coincide with each other. On the other hand, a nut 42 fixed to the X movable base 35 is screwed to the screw shaft 40, and the motor 38 is rotated. And the X moving table 35 moves in the X axis direction.

The linear guide 36A and the linear guide 36B are fixed on the X table 35 in parallel with the direction (Y-axis direction) perpendicular to the direction in which the printed circuit board 5 is transported.
A is a guide block that can slide only in the axial direction.
7B and guide blocks 37C and 37D which are slidable only in the axial direction of the linear guide 36B. The XY carriage 46 on which the XY carriages 46 are fixedly mounted are mounted on the guide blocks 37A, 37B, 37C and 37D. Is a straight guide 3
Guide blocks 37A and 37 slidable on 6A and 36B
B, 37C and 37D are movable in the Y-axis direction. The screw shaft 43 includes bearings 44 </ b> A, 44 fixed on the X movable base 35.
B, the motor 39 is fixed on the X-moving table 35 via a fixture (not shown). The screw shaft 43 and the rotation output shaft of the motor 39 are set so that their axes coincide with each other. A nut 45 fixed to an XY moving table 46 is screwed to the screw shaft 43. When the motor 39 is rotated, the XY moving table 46 moves in the Y-axis direction with respect to the X moving table 35. When the motor 38 is rotated, the X carriage 35 moves in the X-axis direction.
Reference numeral 6 denotes a motor 38, which is combined in the X-axis direction by the motor 39 in the Y-axis direction and moves in the XY directions. Guide blocks 33 sliding on linear guides 31, 32 and 36A, 36B, respectively.
A, 33B, 34A, 34B and 37A, 37B, 37
C and 37D are low-friction ball slides with screw shaft 4
0 and 43 and nuts 42 and 45 are low-friction ball screws.

The XY moving table 46 places the board mounting portion 47 thereon, that is, the transport rails 48 and 49 for supporting the printed circuit board 5 on both sides in the transport direction are fixed on the XY moving table 46. There is also known a configuration in which the distance and position between the transport rails 48 and 49 are changed in accordance with the size of the printed circuit board 5, but the transport rails 48 and 4 may be interposed via another member.
9 is fixed on the XY moving table 46. Further, the board mounting portion 47 is a positioning pin mechanism which is fitted and fixed in a reference hole of the printed board 5, or a side of the printed board 5. Although a mechanism for sandwiching and positioning is provided, it is a well-known configuration and the description is omitted.

The right side of FIG. 1 is a carry-in conveyor 10,
The printed circuit board 5 when it is on the carry-in conveyor 10 is indicated by virtual lines 5 ′. Support members 12 and 13 of conveyor belts for supporting the printed circuit board 5 on both sides in the transport direction are provided on both sides of the base 11. Fixed, each support member 12,
13, a conveyor belt (not shown) is provided on the opposite side to support the printed circuit board 5 on both sides in the transport direction. Motors 14 and 15 are fixed to support members 12 and 13, respectively, and the output rotation shafts are respectively supported by the support members 12 and 13. The printed circuit board 5 protrudes to the opposite side of the printed circuit board, and the pulleys fitted to the respective output rotary shafts stretch the corresponding conveyor belt together with a plurality of pulleys rotatable with the shafts fixed to the support members 12 and 13, respectively. The configuration of the conveyor belt that supports and transports both sides of the conveyor belt is described in, for example, Japanese Utility Model Publication No. 3-12760 proposed by the present applicant.
When the motors 14 and 15 are rotated simultaneously, the conveyor belts supporting both sides of the printed circuit board 5 move in the transport direction when the motors 14 and 15 are simultaneously rotated. A guide block 16 slidable only in the axial direction on the linear guide 31 is provided, and the base 11 is fixed and mounted on the guide block 16. The air cylinder 17 is fixed on the main body base 63 via a fixture (not shown). The rod 18 of the air cylinder 17 is connected to a joint 19 fixed to the base 11. When the rod 18 of the air cylinder 17 moves in and out, the carrying conveyor 10 including the base 11 moves in the axial direction of the linear guide 31.

On the left side of FIG. 1 is an unloading conveyor 20,
The printed circuit board 5 when it is on the carry-out conveyor 20 is indicated by a virtual line 5 ″. Support members 22 and 23 of conveyor belts that support the printed circuit board 5 on both sides in the transport direction are provided on both sides of the base 21. Fixed, each support member 22,
Motors 24 and 25 are fixed to support members 22 and 23, respectively, which are provided with a conveyor belt (not shown) on the opposite surface side of the support member 22 and support the printed circuit board 5 on both sides in the transport direction. The pulleys protruding from the surfaces facing each other and fitted to each output rotary shaft stretch the corresponding conveyor belt together with a plurality of pulleys rotatable on shafts fixed to the support members 22 and 23, respectively, as described above. This configuration is well known and the motors 24, 25
Are simultaneously rotated, the conveyor belts supporting both sides of the printed circuit board 5 move, and move in the transport direction. Guide block 2 that can slide linear guide 31 only in the axial direction
6, the base 21 is fixed and mounted on the guide block 26. The air cylinder 27 is fixed on the main body base 53 via a fixture (not shown). The base 21 is included when the rod 28 of the air cylinder 27 enters and exits. The unloading conveyor 20 moves in the axial direction of the linear guide 31.

Note that the total length of the linear guide 31 is made longer than the total length of the linear guide 32 by adding a distance for the guide blocks 16 and 26 to slide. In FIG. 1, the mounting position 1 is indicated by a circular mark. An alternate long and short dash line 1 </ b> A extends in the X-axis direction through the center of the mounting position 1, and an alternate long and short dash line 1 </ b> B passes through the center of the mounting position 1. Shows a centerline extending in the direction.
The range indicated by the two-dot chain line 2 in FIG. 1 indicates the maximum range in which the XY moving table 46 moves in the X direction and the Y direction. Therefore, the XY moving table 46 moves in the XY direction with or without the printed circuit board 5 placed thereon. This is a range in which the XY moving table 46 and the means for loading and unloading the printed circuit board 5 do not interfere with each other.

FIG. 2 is a front view showing the substrate transfer 50, which is viewed from below with respect to FIG. 1 in a direction orthogonal to the plan view (FIG. 1 shows a part of the substrate transfer 50 with illustration omitted). The main part of the substrate transfer 50 is shown together with the members of the carry-in conveyor 10 to which the main part is attached. The linear guides 31 and 32 are fixed on the main frame 63 through seats to adjust the height.
1A, a guide block 16 that is slidable only in the axial direction on a linear guide 31 is provided, and a base 11 is mounted on the guide block 16, and a support member is mounted on the base 11. The twelve legs 12A are fixed, and the motor 14 is fixed to the legs 12A. One end of the air cylinder 17 is fixed on the main body base 63 via the leg 17A, but the other end is in and out of the rod 18. The rod 18 is a joint 1 fixed to the base 11.
When the rod 18 of the air cylinder 17 moves in and out, the conveyor 10 including the base 11 moves in the axial direction of the linear guide 31.

The substrate transfer 50 has a tooth shape 51A on the lower side.
A transfer arm 51 formed of a rack formed with the arm, an arm guide 52 fixed to the support member 12 of the carry-in conveyor 10 by rotatably supporting the transfer arm 51 only in the X-axis direction, and a left end of the transfer arm 51. And a support plate 54 attached to the support plate 54, which vertically hangs down from the left end of the support plate 54, and which is vertically held against the force acting from left to right when the transfer arm 51 moves leftward (means for pushing out the front end substrate in the transport direction). A) when the transfer arm 51 moves rightward when a force acting from right to left is applied, the lower end is lifted in the extension direction of the support plate 54 (for example, in order to avoid contact with a subsequent substrate), a hinge plate 54A;
Air cylinder 53 vertically fixed on support plate 54
Then, the rod of the air cylinder 53 enters and exits below the support plate 54, and the rod itself or the extension pin attached to the rod has a hemispherical or conical tip, and the printed board 5
Is a transfer pin 53A that fits into the hole provided by
A pneumatic circuit (not shown) is connected to the air cylinder 53 to allow the transfer pins 53A to enter and exit holes in the printed circuit board 5,
When the transfer arm 51 moves to the left, the transfer pin 53A is inserted into the hole of the printed circuit board 5 and moved to the left (to transfer the printed circuit board). When the transfer arm 51 moves to the right, the transfer pin 51 Remove 53A (to leave the transported printed circuit board).

The rack 55 having the tooth profile 55A formed on the upper side is fixed on the main body base 63 in parallel with the linear guide 31. On the other hand, the end portion 12B extending downward from the leg portion 12A is provided in a direction perpendicular to the plane of FIG. The fulcrum pin is fixed, and the fulcrum pin rotatably supports the rotation center hole of the rotating body in which the toothed pulley 56A and the gear 57A are coaxially integrated, and the gear 57A meshes with the tooth form 55A of the rack 55. When the carry-in conveyor 10 including the leg 12A moves left and right in FIG. 2, the rotating body in which the pulley 56A and the gear 57A are coaxial and integrated is rotated. A shaft hole is provided in the arm guide 52 in a direction perpendicular to the plane of FIG. 2 to rotatably support the shaft,
A toothed pulley 56B is fitted and fixed to a shaft protruding forward of the arm guide 52, a gear 57B is fitted and fixed to a shaft protruding inside the arm guide 52, and a gear fitted and fixed to the shaft 57B meshes with the tooth profile 51A of the transfer arm 51 consisting of a rack. When the toothed pulley 56B fitted and fixed to the shaft is rotated, the gear 57B is also rotated, and the transfer arm 51 is moved right and left from the gear 57B via the tooth profile 51A. Moved. Toothed pulley 56A
The toothed belt 58 is stretched over the toothed pulley 56B to transmit the rotation.
And two fulcrum pins are fixed in a direction perpendicular to the paper surface of the drawing, and each fulcrum pin rotatably supports the rotation center hole of the idler pulleys 59A and 59B. The stretched toothed belt 58 is stretched in the middle by idler pulleys 59A and 59B to determine the stretching route of the toothed belt 58.

Next, the operation of the above embodiment will be described. Before the operation of the electronic component mounting apparatus is started, the carry-in conveyor 10, the substrate placing section 47, and the carry-out conveyor 20 are used.
Each position is the same as in FIG. 1, but the printed circuit board 5 is not placed. However, FIG. 1 shows that the electronic component mounting apparatus starts to operate and the mounted printed circuit board 5 mounted on the substrate mounting portion 47 is to be replaced.
8, the carry-in conveyor 10 has moved to the rightmost position, and the carry-out conveyor 20 has the air cylinder 2.
7 is in a state in which the rod 28 is in the conveyor 2 for unloading.
0 moves to the leftmost side, the XY moving table 46 moves in the XY direction within the maximum range indicated by the two-dot chain line 2, and the XY moving table 46 moves the predetermined position of the printed circuit board 5 to the mounting position 1 of the electronic component mounting apparatus. The position is determined, and the mounting of predetermined electronic components on the printed circuit board 5 is completed. FIG. 2 shows that the carry-in conveyor 10 moves to the rightmost side and the board transfer 50 is in a solid line state.

In the position shown in FIG. 1, the loading conveyor 10 is configured such that the motors 14 and 15 circulate through the conveyor belt to receive and transport the printed circuit board 5 from the upstream side. , The stoppers (not shown) prevent the conveyance, the motors 14 and 15 are stopped, and at the same time, the air cylinder 53 is operated to lower the transfer pins 53A and fit into the holes of the printed circuit board 5. At the same time, the motor 38 moves the X movable base 35 to the rightmost position.
The contact portion 11A provided on the base portion 11 of the “0” slightly contacts the contact portion 11A.
Further in parallel, the motor 39 moves the XY moving table 46 to the front side (the lower side in FIG. 1), so that the printed circuit board 5 conveyed from right to left on the carry-in conveyor 10 reaches a predetermined position. That is, the transfer rails 48 and 49 fixed on the XY moving table 46 are
The movement from 0 to a position where the printed circuit board 5 can be received is completed almost at the same time.

3 to 5 show a series of operations for loading and unloading the printed circuit board from and to the XY table, successively from FIG. 1. FIGS. 3 to 5 show a new printed circuit board for explaining the operation of replacing the printed circuit board. FIG. 3 shows the transfer conveyors 5 and 49 fixedly mounted on the XY moving table 46.
0 to a position where the printed board 5A can be received, and when the motor 38 moves the X movable base 35 to the rightmost position, the rod 28 of the air cylinder 27 is simultaneously
Abuts on the base 21 of the unloading conveyor 20 to move the unloading conveyor 20 to the rightmost position.
A is in contact with the left end 35B of the X moving table 35, and the movement of the unloading conveyor 20 is restricted by the operation of moving the X moving table 35 to the right position. When the X moving table 35 has finished moving to the rightmost position. The contact portion 21 </ b> A slightly contacts the left end 35 </ b> B of the X movable base 35. Therefore, the movement of the unloading conveyor 20 is controlled by the movement of the motor 38 on the X-movement table 35 and becomes the same speed. The motor 38 is a servomotor and moves the X-movement table 35 in the X-axis direction. Accurate acceleration control is performed, and the operation of the unloading conveyor 20 is also accurately controlled without providing a dedicated servomotor. In FIG. 3, when the X movable base 35 has been moved to the rightmost position, the printed circuit board 5B on which the electronic components have been mounted and which has been mounted on the printed circuit board mounting section 47 has been mounted on the printed circuit board 5B. The positioning pin that fits and fixes in the reference hole or the positioning mechanism that clamps the side of the printed board 5B is removed so that the printed board 5B can be moved in the transport direction, and the mounted printed board 5B is immediately moved to the unloading conveyor 20, The replacement operation of the printed boards 5A and 5B for placing the new printed board 5A on the carry-in conveyor 10 on the board mounting portion 47 is executed.

First, in the state of FIG. 3, the pneumatic side of the carry-out conveyor 20 where the air cylinder 27 pushes the rod 28 is released to the atmosphere, and the pneumatic side where the air cylinder 27 returns the rod 28 is already released to the atmosphere. (The air cylinder 27 pushes the rod 28 until immediately before, and the return side is open to the atmosphere at that time.) Therefore, the rod 28 of the air cylinder 27 is in a free state in which it does not come and go. The pneumatic side that pushes out the rod 18 supplies compressed air, but the contact portion 11A provided on the base 11 of the carry-in conveyor 10 is
5 is in contact with the right end 35A, the loading conveyor 10 cannot move, and the rod 10 is not pushed out. In this state, if the X movable base 35 moves to the left, the loading conveyor 10 also follows and moves to the left. Means Then, the motor 3
8 moves the X carriage 35 from right to left through FIG. 3 through FIG. 4 to the state of FIG. 5. The carrying conveyor 10 already pushed by the rod 18 of the air cylinder 17 is the X carriage 35.
, And moves to the left, while the contact portion 21A provided on the base 21 of the unloading conveyor 20 is connected to the X movable table 3.
5, the rod 28 of the air cylinder 27 of the unloading conveyor 20 is in a free state in which the rod 28 does not move in and out, and if the X movable base 35 moves to the left, the left end 35B
Then, the contact portion 21A is pushed, and the unloading conveyor 20 moves to the left as a unitary unit. The motor 38 is a servomotor, and accurate acceleration control for moving the X movable base 35 in the X-axis direction is performed. The movement of the carry-in conveyor 10 and the carry-out conveyor 20 is also accurately controlled without providing a dedicated servomotor.

In FIG. 3, a new printed circuit board 5 has already been formed.
A is at a predetermined position of the carry-in conveyor 10, the transfer arm 51 of the board transfer 50 moves to the rightmost side, and the transfer pin 53A is connected to the new printed board 5A.
The motor 38 is inserted into the hole of FIG.
From Fig. 4 to Fig. 5 through the right end to the left end,
The carry-in conveyor 10 is pushed by the rod 18 of the air cylinder 17 and moves leftward completely following the movement of the X moving table 35, while the carry-out conveyor 20 is moved to the air cylinder 2.
7, the rod 28 is in a free state, and moves completely to the left as a whole with the X moving table 35. At this time, the arm guide 52 and the gear 57A of the substrate transfer 50 move to the left integrally with the carry-in conveyor 10. However, the transfer arm 51 slides on the arm guide 52 fixed to the carry-in conveyor 10 and further moves to the left. When the gear 57A moves to the left integrally with the carry-in conveyor 10, the transfer arm 51 is fixed on the main frame 63. The gear 57A meshing with the rack 55 rotates, the rotation of the gear 57A is transmitted to the toothed pulley 56A via a common shaft, and transmitted from the toothed pulley 56A to the toothed pulley 56B via the toothed belt 58. The rotation of the attached pulley 56B is transmitted to a gear 57B via a common shaft, and the gear 57B is connected to the transfer arm 5 via a tooth profile 51A. Is moved to the left, that is, the transfer arm 51 adds the distance that the carry-in conveyor 10 moves to the left with respect to the main frame 63 and the distance that the transfer arm 51 itself moves to the left with respect to the carry-in conveyor 10. The distance that the transfer arm 51 itself moves to the left side with respect to the carry-in conveyor 10 moves to the distance, and the distance that the carry-in conveyor 10 moves to the left side is the gear 56A, the toothed pulley 57A, and the toothed pulley 57A. 57B, toothed pulley 57B and gear 56
There is a transmission ratio of the transmission means determined by B, and the moving distance of the transfer arm 51 itself is determined by the product of the transmission ratio and the distance that the carry-in conveyor 10 moves.

Referring also to FIG. 2 showing a situation in which the transfer arm 51 moves from FIG. 3 to FIG. 5, a substrate transfer 50 corresponding to FIG. 3 is indicated by a solid line in FIG.
FIG. 5 corresponds to FIG.
Is shown by a two-dot chain line, that is, the rod 18 of the air cylinder 17 is pushed out as shown by a rod center line 18 ′, and the joint 19 fixed to the base 11 is pushed out to the position of 19 ′, and is put on the guide block 16. Fixed base 1
Reference numeral 1 denotes a support member 12, a leg 12A, an end 12B, and a motor 1.
4 and the like, and the movement of the carry-in conveyor 10 completely follows the movement of the motor 38 to move the X movable base 35 to the left, and the support member 12 ', the motor 14', and the guide. The transfer conveyor 10 is moved to a position indicated by a block 16 'or the like, while the substrate transfer 50 is provided with an arm guide 52' and toothed pulleys 56A ', 5.
6B 'and the gears 57A' and 57B 'move integrally with the carry-in conveyor 10, but the transfer arm 51 is added to the carry-in conveyor 10 by the distance to which the transfer arm 51 itself moves to the left. 3, the transfer pin 53A is inserted into the hole of the new printed circuit board 5A in FIG. 3, and when the transfer arm 51 moves to 51 ', the transfer pin 53A moves to the position of 53A'. And therefore,
The new printed circuit board 5A is moved by the moving distance of the transfer arm 51 to the state shown in FIG. 5, and at the same time, the hinge plate 54A is at the position of 54A ', but the mounted printed circuit board 5B of the board mounting portion 47 is The hinge board 54A pushes the rear end in the transport direction and moves to the position of 54A 'to be in the state shown in FIG. 5, and the mounted printed circuit board 5B as shown in FIG. The new printed circuit board 5A is conveyed by pushing it up, and the new printed circuit board 5A is conveyed to the substrate mounting portion 47 by the transfer pins 53A.

In the state shown in FIG.
Motors 24 and 25 circulate on a conveyor belt to convey and send the mounted printed circuit board 5B downstream, and
The board mounting portion 47 mounts the new printed circuit board 5A conveyed by the transfer pins 53A and fits and fixes the new printed circuit board 5A in the reference hole of the new printed circuit board 5A, or a side of the new printed circuit board 5A. And position it. At the same time, when the transfer pin 53A is pulled out from the hole of the new printed circuit board 5A, the board transfer 50 immediately retracts the rods 18 and 28 of the air cylinders 17 and 27. The carry-in conveyor 10 and the carry-out conveyor 20 are viewed from the position shown in FIG. 1 immediately, the gear 57A also returns to the right with the loading conveyor 10, so the gear 57B moves the transfer arm 51 to the right, from the position of the transfer arm 51 'shown in FIG. It will return to the position of 51, at which time the hinge plate 54A
Will return after passing through the position of the new printed circuit board 5A of the substrate mounting portion 47, but the lower end of the hinge plate 54A has a mechanism to escape upward when it comes into contact with the new printed circuit board 5A. Returning to the same positional relationship as in FIG. 1, new mounting on the new printed circuit board 5A is started.

[0027]

As described above, according to the electronic component mounting apparatus of the present invention, the mounted printed board is pushed out from the board mounting portion of the XY table to the carry-out conveyor, and the new printed board is received from the carry-in conveyor. In the case of performing the switching operation of placing the electronic component on the board mounting portion of the XY table, as soon as the electronic components are mounted on the printed circuit board of the board mounting portion and the mounted printed board is completed, the X movement configuring the XY table is completed. And the XY moving table and the substrate mounting part move to a position for receiving a new printed circuit board from the loading conveyor, and at the same time, the unloading conveyor follows the X moving table and receive the mounted printed circuit board from the substrate mounting part. Position, and while the XY table moves to the position where it receives the new printed circuit board, the location of the loading and unloading conveyors in parallel Moving to the position is performed, the conventional X
In the present invention, the time required for the carry-in conveyor and the carry-out conveyor to move to a predetermined position after waiting for the movement of the Y table to end is eliminated.

Further, when the carry-out conveyor moves to the position for receiving the mounted printed board from the board mounting portion following the X moving table and when the operation of replacing the printed board is executed, the carry-in conveyor moves in the X direction. The X-table is moved by following the table, and the unloading conveyor is pushed by the X-table and moves together, and the movement is determined by the drive of the servo motor originally provided in the X-table. Accurate acceleration control equivalent to that of an X movable table (a part of an XY table) is performed without providing a dedicated device, and therefore, careless impact is applied to a printed circuit board or a device without adding an expensive device. It is possible to provide a high-reliability electronic component mounting apparatus that can operate at a high speed without any problem.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration for loading and unloading a printed circuit board from an XY table.

FIG. 2 is a front view showing a substrate transfer.

FIG. 3 is a diagram showing a series of operations for loading and unloading a printed circuit board.

FIG. 4 is a diagram showing a series of operations for loading and unloading a printed circuit board.

FIG. 5 is a diagram showing a series of operations for loading and unloading a printed circuit board.

FIG. 6 is a diagram illustrating an example of an electronic component mounting apparatus.

[Explanation of symbols]

Reference Signs List 1 Mounting position of electronic component mounting apparatus 2 Maximum range in which XY moving table 46 moves in XY directions 5 Printed circuit board 5A New printed circuit board 5B Mounted printed circuit board 10 Loading conveyor 11,21 Base 12,13,22,23 Support Members 14, 15, 24, 25, 38, 39 Motors 16, 26, 33A, 33B, 34A, 34B, 37
A, 37B, 37C, 37D Guide blocks 17, 27, 53 Air cylinders 18, 29 Rods 19, 29 Joints 20 Conveying conveyor 30 XY tables 31, 32, 36A, 36B Linear guide 35 X movable base 35A X movable base 35 Right end 35B Left end of X movable base 35 40,43 Screw shaft 42,45 Nut 46 XY movable base 47 Substrate placing part 48,49 Transfer rail 50 Substrate transfer 51 Transfer arm 52 Arm guide 53A Transfer pin 54 Support plate 54A Hinge plate 55 Rack 56A, 56B Toothed pulley 57A, 57B Gear 58 Toothed belt 59A, 59B Idler pulley 60 Electronic component mounting device

Claims (2)

[Claims] An X-axis linear guide parallel to the X-axis direction of the printed circuit board transport direction and fixed to a base, and an X-moving stage capable of moving the X-axis linear guide in the X-axis direction by driving an X-axis motor. A Y-axis linear guide fixed to the X-moving table in the X-axis direction and a Y-axis direction perpendicular to the mounting unit elevating direction, and the Y-axis linear guide is movable in the Y-axis direction by driving the Y-axis motor. An XY moving table movable in the XY directions by combining with the movement of the moving table, a board mounting portion fixed to the XY moving table and mounted on a printed circuit board surface in a direction orthogonal to the mounting means elevating direction; Conveyor for transferring the printed circuit board from the upstream side to the receiving board mounting part so as to be movable in the direction, a contact part provided on the carrying conveyor, and moving the printed circuit board from the board mounting part in the X-axis direction. Unloading conveyor for receiving and sending downstream A contact portion provided on the unloading conveyor, and slidable transfer arm fixed arm guide in the X-axis direction to the carrying conveyor, loading conveyor X
A transmission means for moving the transfer arm to a distance determined by a product of a distance moved in the axial direction and a transmission ratio; a transfer pin provided on the transfer arm, and a transfer pin for entering and leaving a hole in a printed circuit board received from the upstream side by a carry-in conveyor; and a transfer arm. Means for extruding a printed circuit board mounted on the board mounting portion onto a carry-out conveyor. 2. When the XY moving table moves in the XY directions, the carry-in conveyor moves upstream and the carry-out conveyor moves downstream to avoid it, and the carry-in conveyor is received from the upstream side and the printed circuit board is at a predetermined position. When the transfer pin is inserted into the hole and the replacement operation of the printed circuit board is started, the contact portion provided on the unloading conveyor moves in the direction in which the contacting portion provided on the unloading conveyor comes into contact with the X moving table, and the board mounting portion is moved from the unloading conveyor. The XY carriage is moved to the position where it receives the printed circuit board, the X carriage is moved to the carry-in conveyor side, and slightly touches the contact portion provided on the carry-in conveyor, and then the carry-in conveyor is moved to the X carriage. The force in the direction of pressing acts, and the conveyor for unloading does not apply the force to push the X carriage,
By moving the X carriage from the carry-in conveyor side to the carry-out conveyor side, the carry-in conveyor moves following the X carriage, and the carry-out conveyor is pushed by the X carriage and moves together. , The transmission means moves the transfer arm,
The means for pushing out the printed circuit board on which the substrate mounting portion is mounted onto the unloading conveyor and the transfer pins for mounting the printed circuit board on the loading conveyer on the substrate mounting portion are simultaneously moved to execute the operation of replacing the printed circuit board. 2. The electronic component mounting apparatus according to claim 1, wherein: