JPS6041857B2 - Attachment/detaching mechanism of jig cover to jig body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mechanism for attaching and detaching a jig lid to a jig body, and particularly to an assembly apparatus for glass-sealed diodes.

When assembling a diode using a glass tube, a method has been proposed in which a jig having the structure shown in FIG. 1 is used.

This jig is roughly divided into a jig main body 1 and a jig cover 2. The jig main body 1 is a moving chain block 3
a base 4 that engages with the base 4 in a straddling state, a pair of struts 5 vertically installed near both ends of the center of the base 4, and these struts 5.
A lead guide plate 6 and a glass tube guide plate 7 are horizontally arranged in the upper and middle stages of the tube. Heat receiving tubes 8 are vertically installed on the glass tube guide plate 7 at regular intervals in the longitudinal direction (the moving direction of the jig body). Glass tubes for assembling diodes are inserted into these heat receiving tubes 8, and when the jig main body 1 enters a sealing furnace which will be described later, the heat receiving tubes 8 receive heat and become red hot. The glass tube is sealed by softening it. Further, the glass tube guide plate 7 corresponding to the center of the heat receiving tube 8 is provided with a hole 10 into which the lower lead 9 is inserted. In addition, the base 4 directly below these holes 10
A dish-shaped seat 11 for receiving the lower end of the lower lead 9 is provided on the upper surface, and a guide hole 13 for guiding the upper lead 12 is provided in the lead guide plate 6 directly above.
On the other hand, the jig lid body 2 has a pair of vertical bars 14 extending in the vertical direction.
The main body is an upper frame 15 that connects the upper and lower tiers of these vertical bars 14, and a shim 16, and has a structure in which both ends are slidably fitted into the shim 15 and the shim 16, respectively, and do not come off. It consists of weight 17.

Fitting holes 18 are provided in the lower end surfaces of the vertical bars 14 of these jig lids 2, and are adapted to be removably fitted into the tips of the columns 5 of the jig main body 1, respectively. Also,
The lower end of each weight 17 protrudes from the lower frame 16 and contacts the upper end of the upper lead 12, so that the weight of the weight 17 presses the upper lead 12 downward. In such a jig, first, the lower lead 9 is inserted into the hole 10 of the glass tube guide plate 7 of the jig main body 1, the glass tube and the pellet are sequentially inserted into the heat receiving tube 8, and then the upper lead 12 is inserted. Insert.

Next, the jig lid body 2 is superimposed on the jig body 1, and the upper leads 12 are pushed down using each weight 17. While maintaining close contact with the pellets and each lead, etc., the jig lid body 2 is placed on the jig main body 1, and is transported to a sealing furnace and sealed with glass. The diode is manufactured by stopping the diode, and then the jig cover 2 is removed and the diode is taken out. Here, the automatic assembly of diodes proposed by the present applicant will be explained based on FIGS. 2 to 5.

First, the outline of the apparatus will be explained with reference to FIGS. 2 and 3. That is, as shown in FIG.
is placed and moved on the intermittent conveyor 19, moved while being pushed on the connecting table 20, and transferred onto the continuous conveyor 21. The jig main body 1 moving on the continuous conveyor 21 passes through a sealing furnace 22 provided in the middle of the continuous conveyor 21. Further, on the intermittent conveyor 19, a lower lead, a glass tube, a pellet, and an upper lead are sequentially attached to the jig main body 1. After all of the above-mentioned parts are mounted on the jig main body 1, the motor 23 rotates the parts. The jig cover 2 held on the outer periphery of the rotor drum 24 is loaded onto the jig main body 1. Further, a mechanism is provided for holding the jig main body 1 discharged from the sealing furnace 22 on the outer peripheral surface of an unloader drum 26 rotated by a motor 25, and for unloading the jig lid body 72. ing. Further, a high-speed recovery belt conveyor 27 and a low-speed recovery belt conveyor 28 are arranged in series between the unloader drum 26 and the rotor drum 24.
In order to transfer the jig cover 2 from the unloader drum 26 to the high-speed recovery belt conveyor 27, a transfer mechanism has a structure in which the jig cover 2 is pushed out by a protruding pusher 30 attached to the conveyor 29. 31 is arranged, and a guide table 32 is provided from the low speed collection belt conveyor 28.
Arrows 33, 34, 35, 36 move the jig lid 2 sent upward onto the rotor drum 24.
A pushing rod mechanism 37 that moves in a rectangular manner is disposed as shown in FIG. In such a device, the unloader drum 2
The jig lid body 2 unloaded from the continuous conveyor 21 in step 6 is transferred by the transfer mechanism 31 to the high-speed collection belt conveyor 2J7 through the guide table 38 in sequence, and then transferred at high speed to the connecting table 39 and then to the high-speed collection belt conveyor 2J7 at low speed. Collection belt conveyor 28
Move to.

Thereafter, they are gradually moved to the guide table 32, and transferred onto the circumferential surface of the rotor drum 24 one by one by the push rod mechanism 37. Next, the loading mechanism and unloading mechanism will be explained based on FIGS. 4 and 5.

FIG. 4 shows a loading mechanism that stacks the jig cover 2 on top of the jig main body 1, which moves intermittently, when the jig is stopped.

A holding mechanism 40 is shown on the rotor drum 24 for holding the jig lid 2 at 60 degree intervals. This holding mechanism 40 includes two sliding shafts 41 that penetrate the circumferential surface of the rotor drum 24 in the radial direction and slide, an inner frame 42 that connects the inner ends of these sliding shafts 41, and an outer frame 42 that connects the inner ends of the sliding shafts 41. A guide frame 43 with a U-shaped cross section whose ends are connected and into which the jig lid 2 is placed, a compression coil spring 44 that always acts to draw the guide frame 43 toward the center of the rotor drum 24, and a compression coil spring 44 of the guide frame 43. It consists of support plates 45 attached to both ends, and when the jig cover 2 is inserted into the guide frame 43,
A driving section that holds the jig lid 2 is provided. That is, a pair of support plates 45 are provided on both sides of the guide frame 43, respectively.
A rotating shaft 46 is provided with both ends thereof rotatably attached. One end of these two rotating shafts 46 is connected to the support plate 45.
Gears 47 and 48 having the same number of teeth are fixed to the tips of the gears 47 and 48, which protrude from the top. In addition, this support plate 4
A motor 49 is attached to the motor 5, and a drive gear 50 is fixed to the rotating shaft of the motor 49. This drive gear 50 is meshed with one gear 47. Further, an auxiliary gear 51 is arranged between the other gear 48 and the drive gear 50 so as to mesh with each other. On the other hand, tightening rods 53 are provided on each of the rotating shafts 46 to protrude outward through two blocks 52.

Further, a roller 55 having a groove 54 along the central circumferential surface is attached to the tip of each of the tightening rods 53. The groove 54 is in contact with the side edge of the lower frame 16 of the jig lid 2. Further, a ■-shaped groove 56 is provided on the side of the lower frame 16 of the jig cover 2 so that the position of the jig cover 2 with respect to the guide frame 43 is regulated when the rollers 55 are narrowed together. ing. Next, attachment and detachment of the jig lid 2 in the holding mechanism 40 will be explained.

When the motor 49 of the holding mechanism 40 in the upper part of the rotor drum 24 is rotated in the normal direction, the gears 47 and 48 rotate in opposite directions, and the tightening rods 53 move toward each other.
When the jig cover 2 is placed in the guide frame 43, the groove 54 of the roller 55 comes into contact with the side edge of the lower frame 16 of the jig cover 2, thereby further tightening the jig cover 2. At this time, since the side edge of the lower frame 16 is provided with a large ■-shaped groove 56 and the roller 55 rotates, the jig cover 2 moves relative to the roller 55, and the V-shaped groove 56 roller 5 in the center of
The jig cover body 2 is held in an accurate position with 5 facing the jig cover body 2. Further, in the holding mechanism 40 located directly below the rotor drum 24, when the motor 49 is rotated in the reverse direction, the rollers 55 separate from each other and expand, so the jig cover 2 that was being held comes off the guide frame 43. fall downwards.

At this time, a cylinder mechanism 57 is arranged below the side of the rotor drum 24, and just before the holding mechanism 40 performs the release operation, the rod 58 is extended to push down the support plate 45 against the compression coil spring 44. It's becoming like that. As a result, the distance between the tip of the vertical frame 14 of the jig lid 2 and the upper end of the support 5 of the jig main body 1 is small, so that even if the jig falls, the two will surely overlap. On the other hand, the fifth
The structure of the unloading mechanism shown in the figure is exactly the same as that of the loading mechanism, except that the loading/unloading direction of the article is reversed, and the holding operation is performed at the bottom, and the release operation is performed at the top. different.

Moreover, when holding, the rod 58 only further descends. Therefore, the structural description will be omitted, and in FIG. 5, the same parts of the loading mechanism are designated by the same reference numerals. By the way, for such a device,
Since the diode is automatically assembled, it is extremely easy to work with and can speed up the work, but it has the following drawbacks.

That is, when removing the jig cover 2 on the continuous conveyor 21, as shown in FIG. Detection mechanism 61
The detection mechanism 61 confirms the passage of the jig body 1, and the holding mechanism 40 is operated to remove the jig cover body 2. However, since the continuous conveyor 21 passes through a sealed furnace in a high temperature state, expansion and contraction of the conveyor, fluctuations in friction torque, etc. are likely to occur, and the speed of the conveyor is likely to fluctuate. For this reason, the jig body 1 in the detection mechanism 61
The timing of the confirmation of passage of the jig and the clamping of the jig cover 2 by the holding mechanism 40 does not match, and the jig cover 2 cannot be reliably clamped. Therefore, if the lamp is insufficient, the product may be damaged due to the jig cover 2 falling, and the jig body 1 and the jig cover 2 may be damaged.
damage, or subsequent assembly failure due to failure to remove the diode from the jig main body 1, resulting in a low operating rate of the device and a reduction in product yield. Further, when changing the index such as speeding up the continuous conveyor, the position of the detection mechanism must be adjusted each time, which is inconvenient.

Therefore, an object of the present invention is to improve product yield and prevent damage to equipment by reliably attaching and detaching jig lids on a continuous conveyor. Another object of the present invention is to provide an attachment/detachment mechanism capable of attaching and detaching a jig cover without having to adjust the position of a detection mechanism even if the speed of a continuous conveyor changes.

In order to achieve such an object, the present invention includes a transport mechanism that continuously transports a jig main body, and an attachment/detachment mechanism located on this transport mechanism that attaches and detaches a jig lid body to the jig main body. The attachment/detachment mechanism is configured to start the attachment/detachment operation upon detection confirmation of a detection mechanism that detects the arrival of the jig body disposed near the attachment/detachment station of the jig lid l. In the attachment/detachment mechanism for the jig lid body, movement of the jig body from detection of arrival of the jig body to attachment/detachment of the jig lid body is performed by a preliminary transport mechanism; The time from when to when the jig lid is attached and detached is always kept constant, and the present invention will be explained below with reference to Examples.

FIG. 6 shows an embodiment of the jig cover removal mechanism (unloading mechanism) in the attachment/detachment mechanism of the jig cover to the jig main body of the present invention. In addition, in the example, the preliminary transport mechanism for transporting the jig main body in the removal mechanism was replaced with a conventional device (
A diagram added to the apparatus proposed by the present applicant is shown. Therefore, a description of the conventional device will be omitted, and the preliminary transport mechanism will be mainly described. Further, the conventional names and designation numbers of each part are the same as in the above description. A continuous conveyor 21 is shown in FIG.

A jig main body 1 is placed on this continuous conveyor 21, and a diode 62 which is sealed and integrated in a sealing furnace is accommodated in this jig main body 1. Further, a jig lid body (weight) 2 is attached on the jig main body 1, and presses down the tip of the upper lead 12 of the diode 62. In addition, the jig lid body 2 removal station (unloader station) A
An unloader drum 26 is disposed, and a holding mechanism 40 provided on the outer periphery of the unloader drum 26 removes the jig lid 2 on the jig main body 1 conveyed by the continuous conveyor 21. Furthermore, one light source 59 and one phototransistor 60 are provided on each side of the continuous conveyor 21 of the unloader station A, forming a detection mechanism 61. This detection mechanism 61, as shown in FIG.
The side of the base 4 of the jig main body 1 placed on the continuous conveyor 21. It is located on the surface. Therefore, when the jig main body 1 is placed on the continuous conveyor 21 at the unloader station A, the light from the light source 59 does not reach the phototransistor 60. Further, the detection mechanism 61 is provided slightly forward in the transport direction from the center of the width of the unloader drum 26. After the forward end of the jig main body 1 reaches this detection mechanism 61 as shown in FIG. 7b, the forward end reaches the unloader drum 2 as shown in FIG. 7c.
6, the holding mechanism 40 clamps the jig lid 2 on the jig main body 1.
Here, for convenience of explanation, the distance from the position where the detection mechanism 61 detects and confirms the arrival of the jig main body 1 until it is clamped by the holding mechanism 40, that is, the forward end of the jig main body is the forward end surface of the unloader drum 26. The distance 1 reaching 63 will be referred to as the post-detection moving distance. On the other hand, in the unloader station A, as shown in FIG. 6, a preliminary transport mechanism 64 is provided.

This preliminary conveyance mechanism 64 is provided on one side of the continuous conveyor 21 a little before the unloader drum 26. That is, on one side of the continuous conveyor 21, a lever 66 that swings up and down about a support shaft 65 is disposed. A gear box 67 is fixed to the tip of this lever 66, and this gear box 6
A drive motor 68 is attached to the drive shaft of a gear train 7 (not shown), and a rubber roller 69 is attached to the driven shaft. As shown in FIG. 8, the rubber roller 69 is
It faces onto the continuous conveyor 21 and comes into contact with the upper surface of the base 4 of the jig main body 1. Also, this rubber roller 69
The jig main body 1 is moved in the transport direction by a drive motor 68. Further, a spring 70 is attached to the lever 66 so that the peripheral surface of the rubber roller 69 is always in contact with the jig main body 1. Also, if the rubber roller 69 is located too far down, the continuous conveyor 2
The jig main body 1 that is placed on and moves is a rubber roller 6.
9 and is stopped on the continuous conveyor 21 by the rubber rollers 69.
Therefore, a stopper 71 is provided below the lever 66. This stopper 71 is made of a bolt, which is screwed into a support plate 72, and its tip is in contact with the lower surface of the lever 66. Therefore, when the stopper 71 is rotated, the upper end of the stopper 71 moves up and down, and the rubber roller 69
It is designed to determine the lowest position of descent. Further, the contact frictional resistance between the jig main body 1 and the rubber roller 69 is greater than the contact frictional resistance between the jig main body 1 and the continuous conveyor 21. Therefore, if the circumferential speed of the rubber roller 69 is faster or slower than the moving speed of the continuous conveyor 21, a gap will occur between the jig main body 1 and the continuous conveyor 21, and the jig main body 1 is adapted to move at the same speed as the circumferential speed of the rubber roller 69. moreover,
This rubber roller 69 contacts the jig main body 1 from before the jig main body 1 is detected by the detection mechanism 61, and is in contact with the jig main body 1 while the jig cover body 2 on the jig main body 1 is clamped by the holding mechanism 40. It's getting old. Next, the relationship between the preliminary conveyance mechanism and the unloader drum holding mechanism will be explained with reference to FIGS. 7a to 7c.

The jig main body 1 that has passed through the sealing furnace as shown in FIG. transported. At this time, the jig main body 1 is conveyed at the circumferential speed of the rubber roller 69. When the forward end of the jig main body 1 blocks the light beam of the detection mechanism 61, the holding mechanism 40 of the unrotor drum 26 starts operating, and as shown in FIG. The jig lid body 2 on the jig body 1 is clamped and carried away upwards. Incidentally, since the jig main body 1 is transported by the rubber rollers 69, the time taken for the jig main body 1 to pass through the moving distance after detection is always constant regardless of the speed of the continuous conveyor 21. Therefore, the holding mechanism can reliably clamp the jig lid. According to this embodiment, the jig main body is transported by the preliminary transport mechanism while it moves through the movement distance after detection.

Further, since this preliminary conveyance mechanism always transports the jig body at a constant speed, even if the moving speed of the continuous conveyor changes, the jig body is always conveyed at a constant speed. For this reason, the holding mechanism that is driven by the detection confirmation of the detection mechanism clamps the jig lid body after a certain period of time after the detection confirmation, but during this certain period of time, the jig body is always moved by the preliminary transport mechanism after the detection. It corresponds to the time taken when moving the distance. Therefore,
The holding mechanism can always accurately and reliably clamp the jig lid. As a result, the jig cover does not fall off from the holding mechanism due to insufficient lamps (conventionally, about 25% of falling errors occurred), and the product
Damage to the jig body and jig lid can be prevented. Further, unlike in the past, the diode remains housed in the jig body and new assembly is not performed, so there is no failure of the device and the operating rate of the device is improved. Further, since such a preliminary conveyance mechanism is provided, even if the speed of the continuous conveyor is changed and the assembly index is changed, there is no need to correct the position of the detection mechanism as in the conventional case.

Note that the present invention is not limited to the above embodiments.

That is, the preliminary transport mechanism may have another structure. moreover,
The present invention can also be applied to attaching a jig lid to a jig main body. Further, the present invention can be applied to things other than assembling diodes.

That is, it can be applied to attaching and detaching other articles to and from continuously moving articles. As described above, according to the mechanism for attaching and detaching the jig cover to the jig main body of the present invention, the jig cover can be attached and detached accurately and reliably.

Further, according to the mechanism for attaching and detaching the jig cover to and from the jig body of the present invention, the jig cover can be reliably attached and detached even if the moving speed of the jig body changes.

Further, according to the mechanism for attaching and detaching the jig cover to and from the jig main body of the present invention, the jig cover can be reliably attached and detached, so that the jig cover will not be accidentally dropped during attachment and detachment.

Therefore, unlike in the past, the jig lid does not fall onto the product, so the product is not damaged and the yield can be improved. In addition, there are many effects such as no damage to the jig main body, jig lid body, apparatus, etc. due to falling.

[Brief Description of the Drawings] Figure 1 is a perspective view of a diode assembly jig, Figure 2 is a schematic diagram of a conventional diode assembly device, Figure 3 is a schematic plan view, and Figure 4 is a jig lid. FIG. 5 is a perspective view showing the unloading mechanism of the jig cover, and FIG. 6 is a perspective view showing the jig cover unloading mechanism according to an embodiment of the present invention. A perspective view showing the mechanism;
FIGS. 7a to 7c are operation diagrams showing the operation of the removal mechanism, and FIG. 8 is a sectional view taken along the line ■-■ in FIG. 7b. 1... Jig body, 2... Jig lid body, 3
...Chain block, 4...Base, 5
・・・・・・Strut, 6・・・Lead guide plate, 7
...Glass tube guide plate, 8...Heat receiving tube, 9.
...Lower lead, 10...Hole, 11...
...Location, 12...Top lead, 13...
...Guide hole, 14...Vertical frame, 15...
・Upper frame, 16... Lower frame, 17... Weight, 18... Fitting hole, 19... Intermittent conveyor, 20... Concatenation table, 21...
...Continuous conveyor, 22...Sealing furnace, 23...
... Motor, 24 ... Rotor drum, 2
5... Motor, 26... Unloader drum, 27... High speed collection belt conveyor, 28
-0...Low speed collection belt conveyor, 29...
Conveyor, 30...Pusher, 31...
・Transfer mechanism, 32...Guide table, 33~
36...arrow, 37...extrusion rod mechanism,
38... Guide table, 39... Connection table, 40... Holding mechanism, 41...
・Sliding shaft, 42...Inner frame, 43...Guide frame, 44...Compression coil spring, 45...
...Support plate, 46... Rotation shaft, 47, 48...
... Gear, 49 ... Motor, 50 ... Drive gear, 51 ... Auxiliary gear, 52 ...
Block, 53...Tightening rod, 54...
Groove, 55...Shi-ra, 56...■Character groove,
57...Cylinder mechanism, 58...Rod, 59...Light source, 60...Phototransistor, 61...Detection mechanism, 62... Diode, 63...Advance side end face, 64...Preliminary transport mechanism, 65...Spin shaft, 66...Luv, 67...Gear box, 68... ... Drive motor, 69 ... Rubber roller, 70 ... Spring, 71 ... Stopper, 72 ... Support plate.

Claims (1)

[Claims] 1. A transport mechanism that continuously transports the jig body, an attachment/detachment mechanism located on the conveyance mechanism that attaches and detaches the jig lid to the jig body, and a detachment mechanism disposed near the attachment/detachment station of the jig body. a detection mechanism that detects the arrival of the jig main body at the attachment/detachment station, and a preliminary conveyance mechanism that transfers and positions the jig body transferred to the attachment/detachment station to a predetermined position relative to the attachment/detachment mechanism, and the preliminary conveyance mechanism detects the arrival of the jig body. The device is configured to have a roller with a constant rotational speed in contact with the jig so that the jig main body can be transferred at a constant speed, and the detection mechanism detects the arrival of the jig main body transferred by this roller, and after a predetermined time, the jig main body is transferred at a constant speed. A mechanism for attaching and detaching a jig lid to a jig body, the mechanism being configured to start the attaching and detaching mechanism.