JPH06879Y2 - Tray transport device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a tray carrier suitable for use as an electronic component supply unit such as an electronic component suction machine, and more particularly to a FPP,
The present invention relates to a tray transfer device that supplies electronic components such as surface-mounting ICs called PLCC, LCC, and SOIC to a take-in head (adsorption head) for transferring electronic components in a state of being mounted on the tray.

(Prior Art) In recent years, it has been considered to supply surface mounting ICs called FPP, PLCC, LCC, and SOIC in a state of being mounted on a tray.

(Problems to be solved by the invention) In that case, since the arrangement interval of the surface mounting ICs on the tray is different depending on the shape of the surface mounting ICs, the tray carrier device side has to change the surface mounting ICs. It is desirable that the structure be capable of easily coping with the change in the arrangement interval. Further, since the normal trays are used in a multi-tiered state, it is desirable that the empty trays without the surface mounting ICs can be automatically carried out.

(Means for Solving the Problems) In view of the above points, the present invention can easily cope with a change in the arrangement interval of the electronic components on the tray and can efficiently perform the empty tray unloading process. It is intended to provide a device.

The present invention relates to a pedestal that can be moved back and forth with respect to a base, an elevator that can move up and down with respect to the pedestal, and that has a stack of trays mounted thereon, and the elevator that is pivotally attached to the pedestal side. A pressing member for pressing the uppermost tray so as not to be displaced, a positioning means having an indication matching the arrangement interval of the electronic parts placed on the tray, a sensor for detecting the indication, and the sensor. Drive means for advancing the cradle by an arrangement interval of the electronic components by using the detection of the display, a tray unloading head provided on the base for sucking an empty tray in which the electronic components have been lost, and A receiving tray attached to the mount and receiving means,
With the pressing member releasing the pressing of the empty tray, the empty tray is sucked by the tray carry-out head,
The above problem is solved by the structure in which the tray is carried out to position the discharge tray receiving means below the empty tray sucked by the tray carry-out head and the suction of the tray carry-out head is released.

(Operation) In the tray transporting device of the present invention, the elevating table on which the tray is placed is provided on the rack that moves back and forth, and the electronic components on the tray are sucked and transferred to the centering mechanism of the electronic component mounting machine. The take-in position of the head may always be a fixed position. Further, by exchanging the positioning means having an indication corresponding to the arrangement interval of the electronic parts on the tray, one advance distance of the tray is determined corresponding to an arbitrary arrangement interval of the electronic parts placed on the tray. be able to. Furthermore, by providing a tray unloading head, empty trays with no electronic components can be automatically unloaded, and the unloading operation is performed in parallel with the electronic component supply operation, so that time is not wasted and efficient. is there.

(Embodiment) An embodiment of the tray transport device according to the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a base common to an electronic component mounting machine and the like, on which a pair of rails 2 are attached and fixed.

Brackets 4 are fixed to the frame 3 in the front, rear, left and right,
A roller 5 that engages with the pair of rails 2 is rotatably supported by each bracket 4. This allows the pedestal 3
Is movably supported forward and backward (the arrow Y direction in FIG. 1 indicates forward movement and the opposite direction indicates backward movement).

As means for driving the gantry 3, a ball screw shaft 6 below the gantry 3, a motor 7 on the gantry, and the like are provided. That is, the pole screw shaft 6 is rotatably supported by bearings 8 and 9 whose both ends are fixed to the lower surface of the pedestal, and the motor 7 is fixed on the pedestal. Belt wheels 10 and 11 are fixed to the ball screw shaft 6 and the motor rotating shaft, respectively, and a timing belt 12 is wound between the belt wheels 10 and 11. An intermediate portion of the ball screw shaft 6 is screwed with a female screw member 13 fixed to the base 1 side. Therefore, when the motor 7 rotates, the belt wheel 11 and the timing belt 1
The rotation of the ball screw shaft 6 is transmitted to the ball screw shaft 6 via the belt wheel 10 and the belt wheel 10, and as a result, the female screw member 1 of the ball screw shaft 6 is transmitted.
The screwing position with respect to 3 changes, and the pedestal 3 moves back and forth with respect to the fixed base 1 and rail 2.

Two guide shafts 15 are erected on and fixed to the pedestal 3 in a direction perpendicular to the plane of the paper of FIGS. 1 and 2, and an elevating table 16 is slidably supported vertically on the guide shafts 15.

The tray 20 has a rectangular plate shape and is made of FPP, PLCC,
It has a large number of recesses for mounting electronic components 21 such as surface-mounting ICs called LCCs and SOICs at regular intervals, and the electronic components 21 are mounted in multiple stages (for example, 1
They are stacked in 0 stages) and placed on the lift table 16. A pressing member 17 for pressing the uppermost tray 20 so as not to be displaced is pivotally attached to a support 18 on the pedestal 3 in the vicinity of the right end of the lift table 16.

The tray carry-out head 30 is fixedly supported on the base side so as to face the tray 20 when the gantry 3 is retracted in the direction opposite to the arrow Y direction in FIG. The tray carry-out head 30 has a suction pin 31 which is vertically movable at its lower end for sucking the tray 20 by a vacuum suction force. Adsorption pin 3
The elevating operation of 1 is performed by, for example, an air cylinder or the like.

Further, a tray discharge box (or frame) 35 is attached and fixed to the rear of the lift table 16 on the gantry 3.

A take-in head 40 such as an electronic component mounting machine is arranged so as to face the tray 20. This capture head 4
0 does not normally move in the Y direction in FIG. 1, but can move freely in the X direction perpendicular to the paper surface of FIG. The suction pin 41 at the lower end can be moved up and down.

In order to move the gantry 3 forward by a distance corresponding to the arrangement interval of the electronic components 21 on the tray, a positioning plate 22 is fixed on the gantry movement range of the base 1 as shown in FIG. The positioning plate 22 has a large number of concave portions 23 that match the arrangement interval P of the electronic components, and the concave portions 23 are detected optically, magnetically or mechanically by a sensor 24 attached and fixed to the pedestal 3 side. It has become so.

The most advanced stop position of the gantry 3 (the position where the take-in head 40 sucks the electronic components in the last row in the state of FIG. 1) and the most retracted stop position (the tray carry-out head 30)
The limit switch for detecting the empty tray 20 with no electronic parts) and the stop position slightly before the most retracted stop position (the position where the take-in head 40 sucks the electronic parts in the front row). LS1, LS
2, LS3 are arranged and fixed along the rail 2 on the base 1. The limit switch LS1 is activated when it comes into contact with the convex portion 25 inside the front bracket 4, and the limit switches LS2 and LS3 are activated by the convex portion inside the rear bracket 4.

As shown in FIG. 2, in order to move up and down the lift table 16,
A motor 45 is fixed on the gantry 3, and an eccentric disc-shaped lifting cam 46 is fixed to the motor rotation shaft. The lifting cam 46 has a roller 47 as a cam follower.
, And the roller 47 is pivotally attached to the upper and lower sliders 48. The upper and lower sliders 48 are slidably supported in the vertical direction by slider receivers 49 that are vertically installed and fixed on the frame 3. The slider 48 has a pinion 5
0 is pivotally mounted, and the pinion 50 engages with the right rack 51 which is vertically erected on the pedestal 3 side, and the lifting table 1
It also meshes with the left side rack (which is arranged in parallel with the right side rack) 52 fixed to the No. 6 rack. These pinion 5
The mechanism of 0 and the racks 51 and 52 serves to expand the vertical movement of the roller 47.

Therefore, when the lift table 16 is lifted from the state shown in FIG. 2, when the motor 45 rotates, the lift cam 46 rotates, the roller 47 and the upper and lower sliders 48 move up, and the right rack 51 is fixed. Because there is a pinion 50
Rotates clockwise. The rotation of the pinion 50 raises the left rack 52 by a predetermined amount corresponding to the thickness of the tray 20.

Next, the operation of the embodiment of the tray transport apparatus of the present invention will be described with reference to FIGS. 1 to 5.

The range W on the tray 20 in FIG. 1 is the range for taking in the electronic components 21, and when supplying the electronic components on the uppermost tray 20, the gantry 3 is first in the retracted position (the position where the rear bracket 4 operates the LS3). ), The pickup head 40 is placed on the left end of the range W, that is, on the electronic component 21 in the frontmost row of the tray.
(This head does not move in the Y direction in FIG. 1), the take-in head 40 descends, picks up electronic components, rises, and then moves in the X direction (direction perpendicular to the paper surface of FIG. 1). To take out electronic parts.

When the supply of the electronic components 21 in the front row on the tray 20 is completed, the motor 7 is activated, the ball screw shaft 6 rotates, and the positional relationship of the ball screw shaft 6 with respect to the female screw member 13 on the base side is changed. Goes forward. Then, when the sensor 24 detects the recess 23 of the positioning plate 22 that matches the arrangement interval P of the electronic components, the motor 7 stops. As a result, the gantry 3 advances by the arrangement interval P of the electronic components, and the second row of electronic components on the tray faces the take-in head 40. Then, the electronic head in the second row is taken out by the take-in head 40.

By the same operation, the third row on the tray 20, the fourth row,
The electronic components 21 in the last row are sequentially taken out.

Then, the gantry 3 moves to the most retracted stop position (the position where the rear bracket 4 operates the LS2). In this state, as shown in FIG.
At a position farther from the left end of 0, the pressing member 17 falls sideways to release the pressing of the tray 20. Then, the tray carry-out head 30 descends, and after adsorbing the uppermost tray, the tray is held and raised. After raising the tray, presser member 1
7 again presses the remaining tray 20 on the lift 16. After that, the gantry 3 moves forward, goes through the state of FIG.
It stops in the state shown in the figure (the position where the gantry 3 is most advanced). In this state, the uppermost tray 20 is located right above the tray discharge box 35. Here, the tray carry-out head 30
Is released and the tray is dropped into the tray discharge box 35.

After that, the gantry 3 is moved to the position shown in FIG. 4 (the position where the rear bracket 4 operates the LS3) slightly advanced from the most retracted position, and the loading head 40 is taken into the electronic component 21 in the front row of the tray 20 of the second stage. They are opposed to each other (however, when the electronic parts on the second tray are taken in, the uppermost tray has been ejected as described above). At this time, the lift cam 46 is rotated by the operation of the motor 45, and the roller 4 as a cam follower is rotated.
By moving up and down the slider 48 having 7 and further rotating the pinion 50 to raise the rack 52, the lift table 16 is raised by the thickness of one tray, and the second tray 20 is the uppermost tray. Can be raised to the same height as the tray. Then, the electronic component 21 in the front row of the second tray 20 is taken out by the take-in head 40. After that, the second, third, and fourth rows on the second tray 20
The electronic components 21 in the last row are sequentially taken out.

After all the electronic components 21 of the second-stage tray 20 have been taken out, the state returns to the state of FIG. 3 again, and the second-stage empty tray 20
The tray carry-out head 30 sucks and holds the empty tray, and then the empty tray is discharged. Then, the electronic components of the third-stage tray 20 are taken out by the take-in head 40 in the same manner as described above.

In the above embodiment, the positioning plate 22 having the recesses 23 that match the array interval P is used as the positioning means that has the display that matches the array interval P of the electronic components placed on the tray. Alternatively, a positioning member having a convex portion or a hole may be used.

(Effects of the Invention) As described above, according to the tray transporting device of the present invention, there is provided a gantry that can be moved forward and backward, and an elevator that can move up and down with respect to the gantry and on which multi-tiered trays are placed. Positioning means having a display that matches the arrangement interval of the electronic components placed on the tray, a sensor that detects the display, and the arrangement interval of the electronic components using the detection of the display by the sensor. Since the drive means for advancing the gantry, the tray carry-out head for sucking the empty tray that has lost the electronic parts, and the discharge tray receiving means for receiving the tray carried out by the tray carry-out head are provided, It is possible to obtain the effect like.

(1) The lift table for placing the tray is installed on the rack that moves back and forth, and the pick-up position of the pick-up head that sucks and transfers the electronic components on the tray to the centering mechanism of the electronic component mounting machine is always a fixed position. (For example, the front row of electronic components placed on the tray).

(2) By exchanging the positioning means having a display that matches the arrangement interval of the electronic parts on the tray, one advance distance of the tray can be adjusted in correspondence with an arbitrary arrangement interval of the electronic parts placed on the tray. I can decide.

(3) By providing a tray carry-out head, empty trays with no electronic components can be automatically carried out, and since the carrying-out operation is executed in parallel with the electronic component supply operation, time is not wasted and efficient. Is.

(4) Since the top tray on the lift table is attached to the frame side so as to prevent the top tray from being displaced, the top tray can be positioned relative to the lift table when the loading head is loaded. It is possible to eliminate the deviation of the taking-in position of the electronic parts of the taking-in head due to the positional deviation of the tray. Further, when the uppermost tray becomes empty and is discharged by the tray carry-out head, the tray discharge operation of the tray carry-out head can be smoothly executed by releasing the pressing of the tray by the pressing member.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a tray transfer device according to the present invention, FIG. 2 is a front view with a part in section showing the main part of the embodiment, and FIGS. 6 is a schematic front view for explaining the operation of FIG. 1 ... Base, 2 ... Rail, 3 ... Stand, 4 ... Bracket,
5, 47 ... Roller, 6 ... Ball screw shaft, 7, 45 ... Motor, 13 ... Female screw member, 15 ... Guide shaft, 16 ... Elevating table, 20 ... Tray, 21 ... Electronic component, 22 ... Positioning plate, 23 ... Recesses, 24 ... Sensor, 30 ... Tray carry-out head, 35 ... Tray discharge box, 40 ... Take-in head, 46
... Lifting cam, 48 ... Vertical slider, 50 ... Pinion, 5
1,52 ... rack.

Claims (2)

[Scope of utility model registration request] 1. A pedestal (3) which is movable back and forth with respect to a base (1), and an elevating platform (3) on which a multi-tiered tray (20) is movably movable relative to the pedestal (3). 16), a holding member (17) pivotally attached to the pedestal (3) side and holding the uppermost tray on the lift table (16) so as not to be displaced, and an electronic device placed on the tray. Positioning means having a display that matches the arrangement interval of components, a sensor that detects the display, drive means that advances the gantry by the arrangement interval of the electronic components by using the detection of the display by the sensor, The tray unloading head (30) provided on the base (1) for adsorbing an empty tray that has lost the electronic components, and the discharge tray receiving means attached to the gantry (3) are provided. (17) is the push of the empty tray The empty tray is sucked by the tray discharging head (30) in a state where the tray is released, and the discharging tray receiving means is positioned below the empty tray sucked by the tray discharging head by the movement of the rack (3). A tray transfer device characterized by releasing the suction of a tray carry-out head. 2. The tray transfer device according to claim 1, wherein the positioning means is a long plate having irregularities or holes as the display.