JPH07257754A - Unloading device - Google Patents

Abstract

PURPOSE:To prevent the damage to the main part of an objective article due to rubbing by rotating both support bodies in a mutually separating direction to turn them into a released state, after receiving the objective article from a carrying line on the support sections of both the support bodies in a state where a support space corresponding to the width of the objective article is provided between the support sections of both the support bodies. CONSTITUTION:When a lead frame L is advanced to enter into a space of a guide mechanism 15, air cylinders 15a, 15b are actuated, and right and left bar-shaped members 15 therefore move in a mutually approaching direction to take their control positions, and their peripheries severally abut against the right and left end edges of the lead frame L for controlling a carrying direction. The lead frame L moves along a rail member and is transferred to a support body 12, and its right and left ends are severally supported once on each support section 12c of the support body 12. The working force of an air cylinder 14 is then released, and the support body 12 is rotated by the energizing force of a hinge plate 13 with spring to open the support sections 12c in mutually separating directions for dropping the lead frame L on a pallet board 11p.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unloading device for taking out a thin plate-like object such as an IC lead frame from a conveying line to which it is fed and stacking it.

[0002]

2. Description of the Related Art As such an unloading device, there is one disclosed in Japanese Patent Application Laid-Open No. 2-86519 and Japanese Patent Application No. 4-298187.

The unloading device (second stocking means) known from Japanese Patent Application Laid-Open No. 2-86519 is designed to perform stacking while alternately sandwiching interlayer papers between conveyed products, and therefore, from the conveying line. The drop type is used to drop the conveyed items onto a stock tray. In other words, a structure is provided in which a sliding claw for cushioning the shock of a drop is provided between the transport line and the tray, and after the sliding claw is once dropped, the sliding claw is retracted so that the sliding claw drops onto the tray. Has become. This drop type has the advantage of a simple structure, but when the sliding claw retracts, it may rub against the plated part in the center of the lead frame, which may cause scratches that may cause defects, and is also fed by a conveyor roll. If the incoming lead frame is slanted, it is difficult to accurately position it on the tray, and it is easy to get out of the tray.

On the other hand, the unloading device disclosed in Japanese Patent Application No. 4-298187 is constructed so that the lead frame is sucked from the take-out position by the suction means and transferred to the stock means (stocker for storage). Although such an unloading device is excellent in that the lead frames are not displaced, it takes longer time to unload than the conventional example because the lead frames are sucked and conveyed by the suction means one by one. In addition, there is a recent tendency that the lead frame is thinned with a large number of pins and the rigidity thereof is low, so that there is a problem that a defective factor such as overall deformation and particularly weak lead deformation is likely to occur due to suction.

[0005]

The present invention has been made against the background of the above conventional circumstances, and relates to an unloading device for taking out an object from a transfer line and stacking it.
Multi-pin thin and difficult to handle It is possible to handle thin plate-like objects such as lead frames quickly and with minimal force that may lead to deformation, and to stack objects on the layers. The purpose is to enable the insertion and removal of paper, which can be easily incorporated into the insertion operation.

[0006]

For such a purpose, the unloading device of the present invention comprises a stock portion for receiving the stacking of the objects, and has a predetermined depth in the transport direction of the transport line. A supporting portion for supporting the lower surface of the object is provided at a lower end portion having a predetermined length in the up-down direction, and a rotation fulcrum portion is provided at an upper base end portion. A pair of left and right supports that can be rotated around the fulcrum is provided above the stock part, and a support interval corresponding to the width of the object is provided between the support parts of both supports from the transport line. After receiving the objects on the support parts of both supports, rotate both supports in the direction away from each other to open state, thereby releasing the support by each support part and placing the objects on the stock part. I'm trying to drop it.

According to this unloading device, since the support for receiving the object from the transfer line supports the object with the supporting portion provided with the supporting interval corresponding to the width of the object, for example, the plated portion of the lead frame is supported. By setting the support interval so that it does not affect the main part of the object like this, it is possible to effectively avoid scratches etc. due to rubbing on the main part, and it is possible to greatly reduce the defect occurrence rate. .

Further, since the object can be dropped onto the stock part and stacked by simply rotating the support body which has received the object directly from the transfer line, the object can be transferred by suction as in the conventional case, or Unloading can be done more quickly than when sliding the claw back.

Further, since there are remarkably few elements that give a deforming force such as suction, the rate of occurrence of deformation of the leads can be greatly reduced even when used in a lead frame.

Further, even when it is necessary to insert the intercalation paper, it is sufficient to supply it through the support in the opened state after dropping the object, and since there is no obstacle to the insertion, the insertion operation is incorporated. An easy structure can be given.

Regarding the rotation of the support in such an unloading device, a biasing means for biasing the support in the opening direction is provided, and the biasing means resists the biasing in the opening direction. It is more preferable to provide an air pressure actuating body that regulates the support body to a state where the support interval is maintained, and rotate the support body in the opening direction by releasing the operating force of the air pressure actuating body to release the counter force. .

That is, quickness is required for the operation until the object is dropped, while accuracy is required for the returning operation to the support interval after the object is dropped. Therefore, when releasing the support, the support should be opened momentarily by the urging force of the urging means, and the subsequent return operation should be pneumatically operated until the subsequent object is sent. The body relatively slowly and accurately restores the support interval. With such a combination, quick and accurate processing can be performed with a relatively simple configuration.

Further, in such an unloading device, a guide mechanism having a plurality of rod-shaped members which are erected in a row on the left and right sides, and a drive means for moving the rod-shaped members on the left and right sides toward and away from each other, respectively. It is more preferable that the bar is provided along the transport line, and the rod-shaped members on the left and right sides of the guide mechanism are brought close to each other as the object reaches the corresponding portion to regulate the left and right edges of the object.

That is, by providing such a guide mechanism, it is possible to correct the conveying direction and always send the object to the support body in a fixed posture even if the object is misaligned on the conveying line. Therefore, it is possible to smoothly perform unloading without causing an obstacle for taking out the object. In addition, according to this guide mechanism,
Since the contact resistance can be reduced by regulating the point contact between the object and the rod-shaped member, the load on the object is also reduced.

Further, by providing a pushing means on the upper side of the conveying line and pushing the object by this pushing means to feed it onto the supporting portions of both supports, the supporting position of the object on the supports can be made constant, which As a result, the variation in the position after falling into the stock portion is reduced, which is preferable.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, an unloading device incorporated for unloading in a plating device for partially plating an IC lead frame will be described below. First, the plating apparatus will be described. As shown in FIG. 1, in the plating apparatus M, the lead frames supplied from the loader 1 one by one are pretreated by the pretreatment unit 2, then partially plated by the plating unit 3, and then by the posttreatment unit 4. After the post-treatment, after passing through the dehydration roller 5 and the drying unit 6, the unloader 7 is used to unload. The lead frames are sequentially loaded on the transfer line by the loader 1
From the unloader 7 to the unloader 7, and the unloader 7 takes out the lead frames sequentially sent one by one and stacks them. At this time, in this example, an interlayer paper is also inserted between the lead frames.

As shown in FIGS. 2 and 3, the unloading device 10 provided in the unloader 7 includes a transport roller R,
A stock portion 11 that is provided subsequent to the transport line configured by R, ... and that stacks the lead frame L, a pair of left and right supports 12 that receives and supports the lead frame L from the transport line, and a support It is composed of four spring hinges 13 for urging the spring 12, and two air cylinders 14 for restricting the support body 12 to the supporting space maintaining state against the urging force. Further, in this embodiment, a guide mechanism 15 for restricting the transport direction of the lead frame L is provided.
Note that arrow A in FIG. 2 indicates the left-right direction (width direction), and arrow B indicates the front-rear direction (length direction).

The stock portion 11 includes a pair of left and right side wall portions 11a adjusted to have an interval suitable for the size of the lead frame L,
11b and a cross-shaped bottom portion 11c that vertically moves between the side wall portions 11a and 11b. The left and right end portions of the bottom portion 11c are openings 11 provided on the side wall portions 11a and 11b.
It is inserted in d and guided. And this bottom part 11c
Is moved up and down by the step motor 11e so that the lead frame L at the uppermost position always maintains a constant height. That is, when the lead frame L is dropped into the stock portion 11, it is sensed by the sensor S ₁ , whereby the step motor 11e operates and the bottom portion 11c moves down by one lead frame. Furthermore, the stock section 11 of this example
Sensor strip Sp vertically moving in conjunction with the bottom 11c is provided at the upper limit position by the sensor _{S 2, S 3, S 4} , full announcement position, so full position is informed to the operator are detected Therefore, the laminated state of the lead frame L can be easily monitored. The pallet board 11p for mounting the lead frame L is placed on the bottom portion 11c. The pallet board 11p is formed by adjusting the size in advance according to various shapes of the lead frame L. That is, while the pallet board 11p is placed on the bottom portion 11c, the side wall portions 11a and 11b are narrowed so that the side wall portions 11a and 11b are pallet board 11p.
The width of the stock portion 11 is automatically adjusted according to the shape of the lead frame L when the width is regulated by abutting against the.

The pair of left and right supports 12 have the same structure,
The stock portion 11 is rotatably mounted in openings 18 and 19 formed by frame members 16 and 17 extending upward from the side wall portions 11a and 11b, respectively. That is, each of the base end portions 12a has the upper wall portions 18a and 19a of the openings 18 and 19, respectively.
A pivot fulcrum portion is provided by being hinge-connected to, and pivots about the pivot fulcrum portion. And the transport rollers R, R,
Each tip 12 extending below the pass line of ……
b is bent and formed into a key shape, and a support portion 12c is formed. Further, the tongue piece 1 is provided at the center of each base end 12a.
2d is extended toward the inside.

In this example, the spring-attached hinge 13 as the urging means also serves as a pivotal fulcrum of the support 12. That is, the hinges 13 with springs are attached to both sides of the tongue piece 12d at each base end 12a of the support body 12,
By attaching the spring hinges 13 to the upper side wall portions 18a, 19a of the openings 18, 19 described above, the spring hinges 13
Serves as a rotation fulcrum of the support 12, and each tip 12
In the direction in which b is separated from each other, that is, the support 12 is opened.
To turn.

The air cylinder 14 as a pneumatic actuator is
The frame members 16 and 17 are attached to the upper side surfaces thereof and are connected to the tongue pieces 12d of the support body 12, respectively. With the tongue piece 12d pulled up by the air cylinder 14 against the urging force of the spring hinge 13, the respective support portions 12c of the support body 12 have the width of the lead frame L as shown in FIGS. The corresponding support intervals are provided to support the left and right ends of the lead frame L. When the working gas of the air cylinder 14 is released by removing the working gas, the hinge 13 with the spring is attached.
Have the same biasing force, the biasing force causes the support 12 to simultaneously rotate in the directions of the arrows X ₁ and X ₂ (see FIG. 3) to open the support portion 12c.

The guide mechanism 15 includes a pair of left and right air cylinders 15a and 15b as driving means, a pair of support members 15c and 15d that move in a direction toward and away from the air cylinders 15a and 15b, and a conveyance roller R. R ...
It is composed of a plurality of rod-shaped members 15e, 15e, ... Standing up in a row on the support members 15c, 15d so as to project above the pass line from between the spaces. Support member 1
5c and 15d are provided along the transport line, and the end on the stock portion 11 side is the side wall portion 11 of the stock portion 11.
It engages with the engagement pins P, P provided on a and 11b, respectively, and slides along the engagement pins P, P. As a result, the side wall portions 11a and 11a at the restricting position shown by the solid line in FIG.
It comes into contact with b and stops. Therefore, the air cylinder 15a,
The position of 15b is also adjusted in association with the side walls 11a and 11b.

Further, above the transport rollers R, R, ..., The rear end of the lead frame L, the transport direction of which is regulated by the guide mechanism 15, is auxiliary pushed to move the lead frame L by a certain distance to support the lead frame L. Back-boost means 20 are provided for delivering to a fixed position on the body 12. The post-pushing means 20 has elevating arms 20b that always move a certain distance in parallel with the conveying direction of the lead frame L along the rail members 20a installed above the conveying rollers R, R, ... The elevating arm 20b descends after the lead frame L is regulated by the guide mechanism 15, and its tip can come into contact with the rear end edge of the lead frame L.

On the other hand, in this embodiment, in order to prevent the scratches due to the entanglement and rubbing of the leads of the lead frame L to be stacked, the interlayer paper supply device 30 supplies the interlayer paper K and stacks it on the stock section 11. One piece is inserted between each of the lead frames L to be formed. This interlayer paper feeding device 3
0 is configured as follows.

That is, the base paper for interlayer paper K, which is an endless winding bundle (not shown), is pulled out by the pulling-out means 32 through the fixing means 31 in a continuous state from the winding bundle. When the base paper K for interlayer paper is pulled out by a predetermined length, it is fixed by the fixing means 31 and cut by the cutting means 33. The interlayer paper cut out by the cutting means 33 is supplied to the stock section 11 of the unloading device 10 by the transfer means 34.

The fixing means 31 includes a pressing piece 31a, an air cylinder 31b for moving the pressing piece 31a up and down,
It is composed of a pressure receiving member 31c. When the pressing piece 31a is raised by the air cylinder 31b, the interlayer paper base paper K can pass between the pressing piece 31a and the pressing receiving member 31c. On the other hand, when the pressing piece 31b is lowered by the air cylinder 31b, the base paper K for interlayer paper is pressed by the pressing piece 31a.
Thus, the base paper K for the interlayer paper is pressed against the press receiving member 31c and is fixed so as not to loosen due to excessively coming out of the base paper K for the interlayer paper or to return to the winding side.

The pull-out means 32 comprises a gripping unit 32b which slides in the front-rear direction along the rail member 32a. The gripping unit 32b has a pair of upper and lower gripping hands 32c that open and close, and the gripping hand 32c grips and pulls out the base paper K for interlayer paper.

The cutting means 33 includes a pair of upper and lower air cylinders 33a and 33b and these air cylinders 33a and 33b.
And scissors 33c that open and close by. The cutting means 33 is attached to a support wall 36 to which the fixing means 31 is attached, so that the cutting means 33 is adjusted together with the fixing means 31 in the lengthwise direction.

The positions of the fixing means 31 and the cutting means 33 are adjusted by turning the adjusting handle 37. That is, the adjustment handle 37 and the support wall 36 are screwed together, and when the adjustment handle 37 is turned, the support wall 36 slides in the longitudinal direction to adjust the position.

The transfer means 34 is configured to suck and transfer the cut out interlayer paper, and uses suction pads 34b and 34c which move up and down along the rail member 34a. Further, when sucked by the suction pads 34b and 34c, the suction table 34d is applied to the lower portion of the base paper K for interlayer paper.
have. The suction base 34d is hinged at its base end by two hinges 34e, and is rotated by an air cylinder 34f. That is, the suction pad 3
When the 4b and 34c move up and down, they are in a vertical state with the tip end facing downward so as not to interfere with the movement, and when performing suction, they are rotated to a horizontal state with the tip end facing sideways. It is applied to the lower surface of the base paper K for interlayer paper.

The sensor S ₆ is a sensor for notifying that the winding bundle of the base paper K for interlayer paper has become empty. When the base paper K for interlayer paper becomes less and the thickness of the winding bundle becomes thinner, this sensor S 6 is used. It is detected at ₆ and the operator is notified of the time to replace the bundle.

Next, the unloading operation of the unloading device 10 of this embodiment will be described step by step.

When the lead frame L is sent over the conveying rollers R, R, ..., It is detected by the sensor S ₅ . At this time, the guide mechanism 15 is in the separated position shown by the imaginary line in FIG. 2, and the support body 12 has a support interval in which the tongue piece 12d is pulled up by the air cylinder 14 to support the lead frame L. Further, the lifting arm 20b of the rear pushing means 20 is in the raised position.

When the lead frame L is advanced and enters between the guide mechanisms 15, the air cylinder 15 of the guide mechanism 15 is moved.
a and 15b are actuated, and the rod-shaped member 15 is erected on the left and right.
.., e, 15e, ... Move in the direction of approaching each other to become the regulating position, and their peripheral surfaces come into contact with the left and right end edges of the lead frame L to regulate the conveying direction. This allows
It is corrected even if the lead frame L is displaced in a diagonal direction. When the lead frame L enters the space between the guide mechanisms 15 and the conveyance direction is regulated, the elevating arm 20b of the back pushing means 20 descends to be able to contact the rear edge of the lead frame L, and then the rail member. Move along 20a to push the lead frame L towards the support 12 in an auxiliary manner. Therefore, the lead frame L is sent by the transport rollers R, R, ... And moved while being pushed by the back pushing means 20, and finally is completely transferred to the support 12 by the back pushing means 20. That is, the rearward pushing means 20 is adapted to move a certain distance from the final conveyance roller R to a position slightly closer to the support body 12, and therefore the support body 12 is moved.
The lead frame supporting position in is fixed by the rearward pushing means 20.

The left and right ends of the lead frame L transferred to the support 12 in this manner are temporarily supported by the support portions 12c of the support 12. After that, air cylinder 1
The operating force of 4 is released, the support 12 is swung quickly by the biasing force of each spring hinge 13, the support portions 12c are opened in the direction in which they are separated from each other, and the lead frame L is dropped onto the pallet board 11p. Then, the dropped lead frame L is detected by the sensor S ₁ provided in the stock portion 11, and the step motor 11e is operated to operate the lead frame 1
The pallet board 11p for one sheet descends.

On the other hand, in the inter-layer paper feeding device 30, when the lead frame L flowing on the carrying line passes the sensor S ₁ , the gripping unit 32b operates to grip the gripping hand 32.
The base paper K for interlayer paper protruding from the fixing means 31 by c
After gripping the tip end of the
Rises, and the gripping unit 32b moves to the rail member 32.
Slide along a and pull out the base paper K for interlayer paper of a predetermined length. When the base paper K for interlayer paper is pulled out by a predetermined length, the pressing piece 31a of the fixing means 31 descends to press and fix the base paper K for interlayer paper. At the same time, the suction base 34d is rotated and applied to the lower surface of the base paper K for interlayer paper,
Then, the suction pad 3 is provided from above along the rail member 34a.
4b and 34c descend and adsorb the drawn out base paper K for interlayer paper. After that, the air cylinder 3 of the cutting means 33
3a and 33b are actuated and the scissors 33c cut the drawn out interlayer paper K into a length that fits the lead frame L.

Then, when the lead frame L is dropped into the stock portion 11 as described above, the suction base 34d is rotated to be in the vertical state, and then the suction pads 34b, 3b.
4c adsorbs the cut-out interlayer paper and descends through the space between the supports 12 in the open state. Then, the suction is released and the interlayer paper is dropped on the lead frame L stacked on the stock portion 11. After releasing the interlayer paper, suction pad 3
4b and 34c rise and enter a standby state.

When the lead frame L has been transferred to the stock portion 11 and the interlayer paper has been supplied thereon, the tongue pieces 12d of the support body 12 are pulled up by the air cylinder 14,
The support portion 12c serves as a support interval. In addition, the guide mechanism 1
5 is returned to the separated position, and the rearward pushing means 20 is also in the initial position to prepare for the subsequent lead frame L. On the other hand, in the inter-layer paper feeding device 30, the pull-out unit 32b slides along the rail member 32a in order to hold the leading end of the inter-layer paper base paper K protruding from the fixing means 31 after being cut out, and is in an initial state. After that, by repeating the above operation, unloading is performed while inserting the interlayer paper between the lead frames.

[0039]

As described above, according to the unloading device of the present invention, since the support is supported by the support portion having the support interval corresponding to the width of the target object, It is possible to effectively avoid scratches and the like on the main part of the product, and the defect occurrence rate can be greatly reduced.

Further, since the support receiving the object directly from the transfer line is rotated to drop the object on the stock portion, the unloading can be performed more quickly than in the conventional case.

Further, since there are remarkably few elements that give a deforming force such as suction, the rate of occurrence of deformation of the leads can be greatly reduced even when used in a lead frame.

Further, even when the insertion of the interlayer paper is required,
It suffices to supply it through the supports in the open state, and since there is no particular obstacle to the insertion, it is easy to incorporate the insertion operation.

In addition, the biasing means and the pneumatic actuator are combined to perform the opening and returning operations of the support, so that when the support is opened, the support is instantaneously driven by the biasing force. On the other hand, during the return operation, the pneumatic actuator can accurately return to the support interval, and a relatively simple configuration enables quick and accurate processing.

In addition, the guide mechanism having a plurality of rod-shaped members standing in a row on the left and right sides regulates the conveying direction of the object being conveyed. It can be sent to the support in a fixed posture, and unloading can be done smoothly without causing obstacles for taking out the object. Further, according to this guide mechanism, the contact resistance can be reduced by the regulation due to the point contact between the object and the rod-shaped member, so that the load on the object can be reduced.

Since the rear end of the object on the transfer line is additionally pushed to feed the object to a fixed position on the support, the supporting position of the object on the support can be made constant. It is possible to reduce the variation in the position after falling into the stock part.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a plating apparatus in which an unloading apparatus is used.

FIG. 2 is a perspective view of essential parts showing an embodiment of an unloading device according to the present invention.

FIG. 3 is a sectional view taken along the line SA-SA in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 unloading device 11 stock part 12 support means 13 hinge with spring (biasing means) 14 air cylinder (pneumatic actuator) 15 guide mechanism 20 pushing means

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location H01L 21/68 A

Claims (4)

[Claims] 1. An unloading device for picking up thin plate-shaped objects sequentially conveyed by a conveyor line one by one from the conveyor line to bring them into a predetermined laminated state, comprising a stock section for receiving the lamination of the objects. A bottom end having a predetermined depth in the carrying direction of the carrying line and a predetermined length in the up-down direction, and a supporting part for supporting the lower surface of the object is provided at the lower end and the upper end is the base end. Is provided with a rotation fulcrum part, and a pair of left and right supports that are rotatable around the rotation fulcrum part are provided above the stock part, and both support intervals corresponding to the width of the object are supported. After receiving the object on the support portions of both supports from the transport line in the state of being provided between the support portions of the body, the two support bodies are rotated in directions away from each other to be in the open state. Support by support Unloading device according to claim is opened by that so as to drop the object to the stock portion. 2. Pneumatic pressure for providing a biasing means for rotationally biasing the support in the opening direction, and for restraining the support in a support interval maintaining state against the bias in the opening direction by the biasing means. 2. An actuating body is provided, and during the opening operation, the supporting force is released in the opening direction by releasing the actuating force of the pneumatic actuating body and releasing the counter force. Unloading device. 3. A guide mechanism having a plurality of rod-shaped members which are erected in a row on each of the left and right sides and having drive means for moving the rod-shaped members on each of the left and right sides toward and away from each other along a conveyance line. The unloading device according to claim 1 or 2, wherein the bar-shaped members on the left and right sides of the guide mechanism are provided close to each other when the object reaches the corresponding portion to regulate the left and right edges of the object. apparatus. 4. A boosting means is provided on the upper side of the transfer line,
The unloading device according to any one of claims 1 to 3, wherein an object is pushed by the pushing means and is fed onto the supporting portions of both the supporting bodies.