JPH05310317A - Direction changing device - Google Patents

Abstract

PURPOSE:To provide a direction changing device which is capable of changing the direction of a goods to be carried which is recieved from the carrying device of the preceding stage to the arbitrary direction, and of feeding it to the carrying device of the succeeding stage. CONSTITUTION:A carrying unit 3 is rotatably supported in the arbitrary direction by a rotary shaft 2 provided on a base table 1, and the rotational angle is set in an aribitrary manner, and at the same time, a stopper 5 is formed in a depressable manner at the actuating and the non-actuating positions by a roller holding shaft 54 and a cam member 55.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a direction changing device, and more particularly, to a thin plate-shaped article such as a lead frame which is a semiconductor manufacturing component, which is received from one conveying device and then changed in direction. The present invention relates to a device for sending out to a transfer device.

[0002]

2. Description of the Related Art For example, in a semiconductor manufacturing factory, a lead frame is sequentially conveyed to various processing devices such as a die bonding device and a curing device and subjected to predetermined processing. In this case, the various processing devices are arranged continuously along the flow of the lead frame in order to effectively utilize the installation area, and the lead frames are sequentially transferred by a transfer means such as a belt. There is.

Further, in each processing device, when it is necessary to change the direction of the lead frame, a direction changing device for changing the flow direction of the lead frame is provided as necessary.

In many conventional direction changing devices, a conveyor unit provided with a belt for conveying the lead frame and a stopper for stopping the lead frame is provided on the base so as to be rotatable in the horizontal direction. There is.

In this conventional direction changing device, first, the belt is rotated in the receiving direction to receive the lead frame from the preceding conveying device and conveys it to a position where it abuts against the stopper, and then the conveying unit is driven by a driving device such as a cylinder. The belt is rotated in a predetermined direction from the receiving position, and the belt is rotated in the reverse direction so as to be fed to the conveying device in the subsequent stage.

[0006]

However, in the conventional direction changing device, the rotation direction of the transport unit is set to be constant according to the arrangement state of the processing devices arranged before and after the direction changing device. The direction of the lead frame after the direction change is always constant. Therefore, for example, when the lead frame is stored in the storage box by the device provided on the delivery side of the direction changing device, the lead frame is stored in the opposite direction to the storage direction specified in each storage box. There was an inconvenience.

Therefore, an object of the present invention is to provide a direction changing device capable of arbitrarily changing the direction of a conveyed object such as the lead frame.

[0008]

In order to achieve the above-mentioned object, the direction changing device of the present invention comprises a conveyor unit provided with a belt for conveying an object to be conveyed and a stopper for stopping the object to be conveyed. In the direction changing device provided rotatably in the horizontal direction above, the rotation angle of the transport unit can be arbitrarily set, and the stopper can be retracted into the working position and the non-working position, especially the rotation of the transport unit. The feature is that it is formed so as to appear and disappear in conjunction with.

[0009]

[Operation] According to the above configuration, since the rotation angle of the transport unit can be arbitrarily set, after the object to be transported is received, the transport unit is alternately horizontally rotated clockwise or counterclockwise or in one direction. It can be rotated by a desired angle. Therefore, the direction in which the transported object is sent out can be set in a desired direction.

Although the stopper may interfere depending on the rotation direction of the transport unit, since the stopper is formed so that it can be retracted and retracted as described above, when the stopper interferes, the stopper should be placed in the inoperative position. The object to be conveyed can be sent out by moving it.

Further, by interlocking the rotation of the transport unit with the protrusion / retraction of the stopper, when the stopper is on the delivery side when the transport unit is rotated,
The stopper can be automatically moved to the inoperative position.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below based on an embodiment shown in the drawings.

In the direction changing device shown in this embodiment, a rotating shaft 2 is rotatably provided on a base 1 and a conveying unit 3 is fixed to an upper end portion of the rotating shaft 2 so that the conveying unit 3 can be rotated.
Is formed so as to be rotatable in both horizontal directions about the rotary shaft 2.

Further, on the base 1, an air cylinder 11 serving as a drive source for rotationally driving the transport unit 3 is provided. Piston rod 1 of this air cylinder 11
2 is a pinion 21 fixed to the lower part of the rotary shaft 2.
When the piston rod 12 is at the intermediate position, the transport unit 3 moves the object A to be transported.
The transport unit 3 rotates 90 degrees clockwise when the piston rod 12 is fully extended, and the transport unit 3 rotates counterclockwise 90 degrees when the piston rod 12 is fully contracted. Has been done.

In the transport unit 3, the three belts 4 for transporting the transported object, the two stopper pins 5 for stopping the transported object, and the transported object A abutting on the stopper pins 5. That is, the sensor 6 for detecting receipt of the transported object A is provided.

The three belts 4 are a plurality of pulleys fixed to both ends and an intermediate portion of three shafts 41, 41 rotatably provided between the upper portions of the opposing wall surfaces 31, 31 of the transport unit 3. A drive pulley 44 mounted on a motor 43 which is stretched on each of the motors 42 and 42 and is rotatable in the forward and reverse directions.
(See FIGS. 3 and 7).

The pair of stopper pins 5 are provided so as to be able to move up and down between an operating position projecting from the upper surface of the belt 4 and a non-operating position below the belt 4, and both stopper pins 5 are pin supporting plates. It is held by the bottom plate 32 of the transport unit 3 via 51 so as to be vertically movable.

That is, the pin support plate 51 slides two guide shafts 52 vertically provided on both sides of the lower surface thereof into two guide cylinders 33 standing on the bottom plate 32 of the transport unit 3. It is inserted as much as possible, whereby it is held so that it can rotate integrally with the transport unit 3 and can move up and down. In addition, the lower surface of the pin support plate 51 and the bottom plate 32 of the transport unit 3
And the coil spring 5 that urges the pin support plate 51 downward to prevent the pin support plate 51 from vibrating.
3 is stretched.

The vertical movement of the pin support plate 51, that is, the vertical movement of the stopper pin 5 is performed by the roller holding shaft 54 provided on the pin support plate 51 and the cam member 5 provided on the base 1.
5 is performed in conjunction with the rotation of the transport unit 3.

The cam member 55 is a so-called end face cam, and is provided on the base 1 via a cam support 56, and the rotary shaft 2 is provided at the center of the support 56 and the cam member 55. A through hole 57 is formed to pass through. Also,
A rolling roller 54a for smooth operation is provided at a portion of the roller holding shaft 54 that comes into contact with the cam surface.

The cam surface of the cam member 55 has the object A to be conveyed.
When the stopper pin 5 projects in the feeding direction, the portion 55a corresponding to the position of the roller holding shaft 54 at this time is formed low so as to lower the stopper pin 5 to the non-operating position. The other portion 55b is formed high.

Next, the operation of the direction changing device having the above structure is
This will be described with reference to FIGS. 2 to 7. First, when receiving the transferred object A sent from the transfer device 71 of the processing device 7 in the previous stage, as shown in FIGS. 2 and 3, the piston rod 12 of the air cylinder 11 is set to an intermediate position, The conveyor unit 3 is directed toward the conveyor device 71 and the belt 4 is rotated in the receiving direction. At this time, since the roller holding shaft 54 is in contact with the cam surface 55b of the cam member 55 at a high position, the stopper pin 5 projects to a higher operating position than the belt 4.

In the normal apparatus configuration, the carrying unit 3 and either of the front and rear carrying devices are movably formed,
When the object A to be conveyed is transferred between the two, the two should be brought close to each other to ensure the transfer, and when the transfer unit 3 is rotated, the two should be separated so as not to collide with each other. ing.

When the object A to be conveyed is received from the conveying device 71 at the preceding stage and the object A to be conveyed comes into contact with the stopper pin 5, the sensor 6 detects this and stops the belt 4. By providing two stopper pins 5 on both sides of the transport unit 3, it is possible to align the transported object A in a normal direction even when the transported object A is obliquely transported.

Next, the transfer device 81 of the processing device 8 in the next step.
The transported object A Upon sending and turning, and when directing right A _R transported object A to the processing device 8 side in FIG. 2, and a case to direct the left A _L to the processing unit 8 side in.

[0026] When sending out toward the right side A _R processing device 8 side of the conveyed object A, as shown in FIGS. 4 and 5, is rotated 90 degrees conveying unit 3 in the counterclockwise direction, via the belt 4 The object A to be conveyed is sent toward the conveying device 81 of the processing device 8. At this time, the stopper pin 5 is
Since it does not hinder the delivery of, it can be left in the operating position.

When the left side A _L of the transported object A is directed to the processing device 8 side, the transport unit 3 is rotated clockwise by 90 degrees as shown in FIGS. 6 and 7. Thus, when the transport unit 3 rotates 90 degrees in the clockwise direction, the roller holding shaft 54 moves to the cam surface 55a at the lower position of the cam member 55, so that the pin support plate 51 descends by the action of the coil spring 53 and the stopper. The pin 5 moves to the inoperative position.

As a result, the object A to be conveyed is passed through the belt 4.
Can be sent out toward the transfer device 81 of the processing device 8, and the direction of the transferred object A can be reversed to that in FIGS. 4 and 5.

As described above, the feeding direction of the object to be conveyed A can be arbitrarily set, so that, for example, when the lead frame is stored in the storage box by the next processing device 8, the direction of the lead frame is set. Can be aligned with the storage direction specified for each storage box.

The direction changing device of the present invention is not limited to the direction changing device for carrying the lead frame, but can be applied to carrying various articles, and the rotation angle of the carrying unit can be set arbitrarily. be able to. Further, although it is preferable that the transport unit can rotate in both directions from the receiving position of the transported object, the transport unit may be driven by a motor to rotate in only one direction. For example,
Instead of rotating 90 degrees counterclockwise, it may be rotated 270 degrees clockwise.

Further, the stopper is not limited to the one that vertically moves up and down, but may be a type in which a pin or a plate rotates, and the retracting operation can be electrically performed by other means, for example, an electromagnet. Further, in the above embodiment, the stopper pin is formed so as to move up and down in conjunction with the rotation of the transport unit, but it may be moved independently to the operating position and the non-operating position.

[0032]

As described above, in the direction changing device of the present invention, the rotation angle of the transport unit can be arbitrarily set, and the stopper is formed so as to be retractable between the operating position and the non-operating position. It is possible to convert an object to be conveyed received from the former-stage conveying device into an arbitrary direction and send it to the latter-stage conveying device.

[Brief description of drawings]

FIG. 1 is a perspective view of a turning device showing an embodiment of the present invention.

FIG. 2 is a plan view showing a state when receiving an object to be conveyed.

FIG. 3 is a front view of the same.

FIG. 4 is a plan view showing a state when a conveyed object is sent out.

FIG. 5 is a front view of the same.

FIG. 6 is a plan view showing a state in which a conveyed object is sent out in the opposite direction.

FIG. 7 is a front view of the same.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Base 11 ... Air cylinder 13 ... Rack 2 ... Rotation shaft 21 ... Pinion 3 ... Conveyance unit 33 ... Guide cylinder 4 ... Belt 42 ... Pulley 5 ... Stopper pin 51 ... Pin support plate 52
... Guide shaft 54 ... Roller holding shaft 55 ... Cam member 6 ... Sensor A ... Conveyed object

Claims (2)

[Claims] 1. A direction changing device in which a transport unit including a belt for transporting a transport object and a stopper for stopping the transport object is provided on a base so as to be rotatable in a horizontal direction, and the transport unit is rotated. A direction changing device characterized in that an angle can be arbitrarily set and the stopper is formed so as to be retractable in an operating position and a non-operating position. 2. The turning device according to claim 1, wherein the stopper is formed so as to project and retract in association with the rotation of the transport unit.