JPH0252611B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is provided as part of an electronic component resin sealing process, and is used to supply tablets to an existing preheater while automatically aligning tablets from a stocker. It is related to the device.

[Conventional technology]

In the process of resin-sealing electronic components, a short cylindrical tablet (resin raw material) is preheated with a preheater and then placed into an electronic component resin-sealing press. The present applicant has already proposed a device that automatically supplies a plurality of tablets to a preheater (for example, Japanese Patent Application No. 58-70690
Publication No. 49374), Patent Application No. 1983-229129 (Special Publication No. 1987-229129)
Publication No. 53933)).

[Problem to be solved by the invention]

However, in the above-mentioned apparatus, since a plurality of tablets are supplied onto the electrode of the preheater while being in close contact with each other, there is a drawback that uneven baking is likely to occur in the close contact area.

Therefore, the present invention makes it possible to arrange a plurality of tablets at intervals on the electrode of a preheater, thereby preventing uneven heating of the tablets, and also allows the arrangement interval of the tablets to be adjusted freely, thereby reducing the number of tablets. It is an object of the present invention to provide a tablet feeding device that can be arbitrarily selected.

[Means to solve the problem]

The present invention comprises a conveyor which is equipped with a large number of inclined crosspieces, faces into the hopper, scoops out the tablets in the hopper, and supplies them onto the inclined chute, and a pair of stoppers which perform seesaw motion. a tablet feeding mechanism for feeding the tablets on the chute one by one to the lower end of the chute; and a tablet feeding mechanism for feeding the tablets at the lower end of the chute to a tablet holder attached to the lower end of the chute by pushing the tablets at different distances. By doing so, the tablet arranging mechanism that arranges the tablets while maintaining a gap between them and the tablet holder on which the tablets are arranged are pushed up outside the tablet arranging section in which the tablet feeding mechanism and the tablet arranging mechanism are incorporated. The above-mentioned problem has been solved by a tablet feeding device comprising a tablet pushing up mechanism and a tablet transporting mechanism that chucks and transports the tablet pushed up by the tablet pushing up mechanism onto the electrode of a preheater.

[Effect]

The tablets scooped out from inside the hopper by the conveyor roll on an inclined chute and are stopped by a pair of stoppers. The pair of stoppers feeds the tablet one by one by performing a see-saw motion. In this manner, each time a tablet is fed, the tablet arranging mechanism operates to push the tablet and feed it onto the tablet holder. A predetermined number of tablets are supplied onto the tablet holder. For example, in the case of three tablets, the distance the tablets are pushed by the tablet arrangement mechanism is divided into three stages. Thus, appropriate spacing is maintained between the three tablets,
Thus, each tablet is uniformly preheated on the electrode.

〔Example〕

Preferred embodiments of the present invention will be described with reference to the drawings.

First, the mechanism of the conveyor section will be explained with reference to FIGS. 1 and 2. In the figure, 1 is a hopper, the upper lid 1a of which is opened and a large number of tablets 2 are thrown into the hopper. 3 is a conveyor that forms one side wall of the hopper 1, and there are crosspieces 4 inclined at approximately 10 degrees at appropriate intervals.
Place. Also, conveyor 3 itself is located several times behind.
Tilt 10 degrees. The width of the conveyor 3 is such that, for example, two tablets 2 can fit between the crosspieces 4.
Reference numerals 5 and 6 indicate side plates attached to both sides of the front side of the conveyor 3 to prevent the tablets 2 placed on the crosspiece 4 from rolling. The lower end of the slope of the crosspiece 4, that is, the upper end of the right side plate 6 in FIG. The tablet 2 rolls on this inclined chute 7 and reaches a tablet alignment section to be described later. 8 is a speed control motor for driving the conveyor 3 in circulation. The speed control motor 8 is stopped from rotating in response to a detection signal from a sensor that detects that the tablet 2 is fully placed on the chute 7. The chute 7 is guided downwardly into the tablet alignment section. Next, Figures 3 to 8
To explain the structure of the tablet alignment section in detail with reference to the figures, 10 is a tablet feeding mechanism installed above the chute 7 introduced into the upper part of the tablet alignment section, and 11 is also arranged at the upper part of the tablet alignment section. In the tablet arranging mechanism, the tablet feeding mechanism 10 temporarily blocks the tablets 2 rolling on the chute 7, and then transfers the tablets 2 to the chute 7.
The tablet arrangement mechanism 11 is for pushing the tablets 2 sent to the lower end of the chute 7 onto the tablet holder 12 at predetermined intervals. Details of the tablet feeding mechanism 10 are shown in FIGS. 3 and 4.
There, 13 is the top plate of the tablet alignment section,
A link mechanism installation plate 14 is fixed under it. 15
A cylinder is fixed to the link mechanism installation plate 14 and is used to operate the link mechanism.
Guide rods 16 and 17 are suspended from the link mechanism installation plate 14 and are slidably inserted into the LM ball cases 18 and 19, respectively. The cylinder rod of the cylinder 15 has a floating joint 20 and a floating plate 20a.
Connect to the underside of either LM ball case via. 21 is a link pivotally supported on the lower side of the link mechanism installation plate 14 by a link bearing 22;
A rotating ring 24 attached to the LM ball cases 18, 19 is engaged with the concave portions 23 formed at both ends thereof. 25 is the second pin fixed to the LM ball case 18.
A stopper 26 is a first stopper fixed to the LM ball case 19, which is alternately lowered via a link 21 that performs a seesaw motion, and blocks the tablet 2 rolling on the chute 7 when lowered. . Next, the tablet arrangement mechanism will be explained with reference to FIGS. 5 and 6. Reference numeral 30 is a pushing motor whose rotating shaft is coupled to a screw shaft 32 via a coupling 31. Reference numerals 33 and 34 designate screw shaft plates that pivotally support the screw shaft 32, and guide rods 35 and 36 are arranged side by side with the screw shaft 32 sandwiched between them. 37 is a screw flange 38 screwed into the screw shaft 32 in the center.
The guide rods 35 and 36 are slidably inserted into both sides of the slider. This slider 37 reciprocates as the screw shaft 32 rotates. 39 is an encoder installed at the end of the screw shaft 32, and 40 is a sensor. Reference numeral 41 denotes a tablet bar attached to the slider 37, on which a tablet pad 42 is fixed.

Next, other mechanisms of the tablet alignment section will be explained with reference to FIGS. 7 and 8. Reference numeral 43 is an elevating cylinder whose cylinder rod is fixed to the underside of the tablet holder 12. 44 is a cylinder mounting plate for installing the elevating cylinder 43, and is fixed on a cylinder base 46 fixed on a pillar 45 erected on the base. 47, 48 are
Cylinder mounting plate 4 sandwiching lifting cylinder 43
3. Insert guide rods 49 and 50 into each of the LM ball cases so that they can slide freely. The upper ends of the guide rods 49 and 50 are both fixed to the tablet holder 12, and their lower ends are fixed to the guide rod fixing plate 5 below the cylinder base 46.
1. Incidentally, the top plate 13 in the tablet arrangement section is formed with a through hole 52 through which the tablets arranged on the tablet holder 12 can be exposed. Next, the structure of the chuck section will be explained with reference to FIGS. 9 to 11. Reference numeral 53 denotes an opening/closing cylinder installed on a base plate 54, and a rack 56 is attached to the cylinder rod via a joint 55. A pinion gear 57 meshes with the rack 56, and a shutter bar 59 is fixed to the rotating shaft 58 thereof. Rotating shaft 58 of pinion gear 57
is supported by a bearing 60 provided on the base plate 54. Reference numeral 61 denotes an elevating cylinder fixed on the bottom plate 62, and its cylinder rod is joined to the base plate 54 via a connecting plate 63. 64,65
are fixed to the notches on both sides of the base plate 54.
Guide rods 67 and 68 arranged between a top plate 66 and a bottom plate 62 are slidably inserted into the LM ball case. 69 is LM ball case 6
A sensor dog 5 is attached to the sensor dog 69, and a sensor 70 is a sensor that detects the up/down state of the sensor dog 69.
Reference numerals 71 and 72 are chuck cylinders fixed on the left and right sides of the back side of the base plate 54. The cylinder rod of one chuck cylinder 71 is fixed to the chuck 73, and the cylinder rod of the other chuck cylinder 72 is fixed to the chuck 74. 75 is a guide shaft, one end of which is connected to chuck 7.
4, and the other end is slidably inserted into the top of chuck 73. 76 is an LM ball case that supports the guide shaft 75. 77
is a guide shaft, one end of which is fixed to the top of the chuck 73, and the other end slidably inserted into the top of the chuck 74. 78 is an LM ball case that supports the guide shaft 77. 79
is a conveyance cylinder installed on the top plate 13, and its cylinder rod is fixed to the rod plate 80. Guide shafts 81 and 82 are arranged on both sides of the conveyance cylinder 79, and their tips are fixed to the rod plate 80. 83 is a support fixed on the top plate 13, and guide shafts 8 are installed on both sides of the support.
1 and 82 are slidably inserted. 84 is an electrode of the preheater 85.

To explain the operation of the present invention with reference to the illustrated embodiment, prior to starting the device, the upper cover 1 of the hopper 1 is
A is opened and a large number of tablets 2 are inserted.
When started, the conveyor 3 is circulated by the speed control motor 8, and the tablets 2 placed on the crosspieces 4 of the conveyor 3 inside the hopper 1 are carried out of the hopper 1. The speed of conveyance can be adjusted by a speed control motor 8. At this time, two tablets 2 may be placed on the crosspiece 4, or only one tablet 2 may be placed on the crosspiece 4, and there may be cases where no tablet 2 is placed on the crosspiece 4. Because the crosspiece 4 is inclined, the tablet 2 rises while being biased towards the side plate 6, and when it eventually passes the upper end of the side plate 6, the tablet 2 rolls due to the slope of the crosspiece 4 and escapes from the conveyor 3. It moves onto the chute 7 attached to the upper end of the side plate 6, rolls on the chute 7 along its inclination, and enters the tablet alignment section. There, the tablet 2 is placed in the first position raised in the tablet feed mechanism 10.
It passes through the stopper 26 and is temporarily blocked by the second stopper 25 which is descending (see FIG. 3). When the cylinder 15 operates there,
LM ball case 19 (floating plate 20a) via floating plate 20a
(when fixed to the LM ball case 19) is lowered. Accordingly, the link 21, in which the rotating ring 24 provided on the LM ball case 19 is engaged with the tip concave portion 23, is rotated about the axis of the link bearing 22, and conversely, the LM ball case 18 and the The integrated second stopper 25 is raised. Through this operation, the first tablet 2a rolls toward the tip of the chute 7, and the second tablet 2a rolls toward the tip of the chute 7.
The second tablet 2b is temporarily blocked by the first stopper 26. Thereafter, the link 21 is rotated in the opposite direction by the action of the cylinder 15, and the first stopper 26 is raised and the second stopper 25 is lowered. At that time, the second tablet 2b is
It escapes from the stopper 26 and advances, is blocked by the second stopper 25 and waits. When the chute 7 is full of tablets 2, a sensor at the end of the chute 7 detects this and stops the operation of the speed control motor 8, temporarily halting the supply of tablets 2. The tablets 2 that have reached the tip of the chute 7 are arranged on a tablet holder 12 at regular intervals by a tablet arrangement mechanism 11. That is, the pushing motor 3
0 starts, the screw shaft 32 rotates through the coupling ring 31, and the slider 37 rotates through the screw flange 38.
Move along 2. The movement is supported by guide rods 35,36. As the slider 37 moves, the tablet bar 41 (tablet bar 42) installed on the slider 37
The tablet 2 at the tip of the chute 7 is pushed onto the tablet holder 12 for one. For each pushing operation, the tablet feeding mechanism 10 operates and feeds one tablet 2 to the tip of the chute 7. The interval between the tablets 2 on the tablet holder 12 can be freely set by adjusting the rotation speed of the pushing motor 30 when the rotation speed of the pushing motor 30 is set in advance in three stages. In the illustrated embodiment, the tablet 2 is placed on the tablet holder 12.
Although the case where three are mounted is shown, it goes without saying that the invention is not limited to this. Tablet holder 12
When a predetermined number of tablets 2 are set upward, the lifting cylinder 43 is started in response to a signal from the sensor 40 (FIG. 6), and the tablet holder 12 is moved into the through hole 52.
and push it up onto the top plate 13 (see Figure 7). Its movement is supported by guide rods 49,50. During this raising of the tablet, the opposing chucks 73, 74 are open and the tablet is located between them. So check cylinder 7
1 and 72 are activated, and the chucks 73 and 74 are respectively activated.
Attract. As a result, the tablet is chucked onto the tablet cradle 12. Subsequently, the elevating cylinder 61 is activated to lift up the entire chuck portion connected via the connecting plate 63 (see FIG. 11). At the same time, the transport cylinder 7
9 is actuated to transfer the chuck portion through the rod plate 80 onto the electrode 84 of the preheater 85. At this point, the elevating cylinder 61 moves downward, and the chuck cylinders 71, 7
When the tablet 2 moves the chucks 73 and 74 in the separating direction, the tablet 2 moves the chucks 73 and 74 away from each other.
It is released from 74 and left behind on electrode 84.
And the chucks 73 and 74 are the lifting cylinders 6
1, it rises while remaining open, and is moved back to its original position by the action of the transport cylinder 79, and then lowered again by the action of the elevating cylinder 61, waiting for the next group of tablets to be pushed up. By repeating the above operations, this device automatically heats multiple tablets at pre-heater 85 at predetermined intervals.
continue to be juxtaposed on the electrodes 84 of.

〔Effect of the invention〕

The present invention is as described above, and can be easily incorporated into a line as part of an electronic component resin encapsulation process, thereby automatically and continuously placing a plurality of tablets on preheater electrodes at predetermined intervals. The tablets can be placed side by side, which not only improves work efficiency but also prevents uneven baking of the tablet.

[Brief explanation of drawings]

Fig. 1 is a side vertical sectional view showing the configuration of the conveyor section in the present invention, Fig. 2 is a front view of the conveyor, Fig. 3 is a front view of the tablet feeding mechanism, and Fig. 4 is a front view of the tablet feeding mechanism.
5 is a front view of the tablet arrangement mechanism, FIG. 6 is a plan view thereof, FIG. 7 is a front view of the tablet arrangement section, FIG. 8 is a side view thereof, and FIG. 9 is a chuck section. 10 is a plan view thereof, and FIG. 11 is a side view thereof. Explanation of symbols, 1...hopper, 3...conveyor,
4... Crosspiece, 7... Chute, 10... Tablet feeding mechanism, 11... Tablet arrangement mechanism, 12... Tablet holder, 25... Second stopper, 26... First stopper.

Claims (1)

[Claims] 1. A conveyor equipped with a large number of inclined crosspieces that faces into the hopper, scoops out the tablets in the hopper, and supplies them onto the inclined chute, and a pair of stoppers that performs a see-saw motion to move the tablets into the hopper. A tablet feeding mechanism that sends the upper tablet one by one to the lower end of the chute, and a constant number of tablets at the lower end of the chute that are pushed and fed to different distances onto a tablet holder attached to the lower end of the chute, a tablet arranging mechanism for arranging the tablets while maintaining an interval between them; and a tablet push-up mechanism for pushing up the tablet holder on which the tablets are arranged out of the tablet arranging section in which the tablet feeding mechanism and the tablet arranging mechanism are incorporated. and a tablet conveyance mechanism that chucks and conveys the tablet pushed up by the tablet push-up mechanism onto the electrode of the preheater.