JPS6216961A - Work revolving device - Google Patents

Abstract

PURPOSE:To have revolution of a work in a small space by pivoting No.2 rotating member to an elevating block in such a way that the member can be rotated by the rotational motive of No.1 rotating member with a specified ratio of rotations. CONSTITUTION:When levers 29, 31 rotates 45 deg., they are situated in a line, and elevating blocks 19, 19 rise to the uppermost positions. Meantime pulleys 22, 22 rotate 45 deg. to cause other pulleys 24, 24 to rotate 90 deg. through belts 25, 25, and in the same manner, chucks 26, 26 rotate 90 deg.. If a piston rod 35 is stopped advancing at the time when said levers 29, 31 have made another turn of 45 deg. from said state in a line, the elevating blocks 19, 19 sink to the down positions as original, and meantime the pulleys 22, 22 make another turn of 45 deg. from the up positions, while the pulleys 24, 24 make another turn of 90 deg. from the upper limits. Accordingly the work 1 rotates 90 deg. during rise and makes another turn of 90 deg. during sinking and the result is 180 deg. rotation to bring it back onto the original work inverting position P on a collection rail 5.

Description

[Detailed description of the invention] First birth, nu run! This invention can handle workpieces such as strips and rods at 180° and 90°.
This invention relates to a work rotation device that rotates a workpiece at a fixed angle such as °.

In manufacturing equipment that processes workpieces by flowing them through a single workpiece production line, the workpieces may be rotated 180 degrees vertically or 90 degrees horizontally at a fixed position on the production line. This will be explained below with reference to FIGS. 9 and 10 using, for example, an example of equipment for a stamping process in the manufacture of semiconductor devices.

In the figure, (1) is a workpiece, after semiconductor pellet mounting and wire bonding are performed at multiple locations lined up at regular pitches on a strip-shaped lead frame (2), package parts (3) (3)... It is made by resin molding. (4) is a guide rail for transporting the workpiece (1), on which a plurality of workpieces (1) are intermittently fed at a fixed pitch in the longitudinal direction of the package parts (3), (3)... When the package part (3) (3)... is placed on the specified stamping button, the package part (3) (3)...-
The product name etc. is stamped on the top. (5) is the guide rail (4)
One stamped workpiece (1) on the guide rail (4) is carried into the position where the collection rail (5) is located. Then, this workpiece (1) is fed at a fixed pitch in the workpiece width direction from the guide rail (4) onto the collection rail (5).
) on the workpiece (1) (1) ... is fed intermittently at a fixed pitch in the width direction, (7) (7) is the feed claw (6)
(6) For example, it is a chain con-hair that supports... The bar 7 cage part (3) of the other work (1) (
3) Assuming that the number of ... is N, every time the workpiece (1) on the guide rail (4) is fed at a constant pitch N times, the workpiece (1) is fed once at a constant pinch on the collection rail (5). Then, the workpiece (1) is turned over 180 degrees on the collection rail (5) with enough time to feed the workpiece, as will be described later. (8) is the collection rail (5)
(9) is a support stand for the magazine (8); (10) is an elevator platform that ascends inside the magazine (8) and then descends by a fixed pitch; (1)) is an electric heater mechanism that moves the lifting platform (10) up and down. The upper end of the magazine (8) is located at the height of the collection rail (5), and the lifting platform (10) initially rises to near this upper end opening, and then lifts the magazine (8) from the collection rail (5).
When two workpieces (1) are fed into the upper opening of the magazine (8), the workpieces (1) are placed on the lifting platform (10), and the lifting platform (10) is lowered by the thickness of the workpieces. ,
Waits for the next work supply. By repeating this operation, a plurality of workpieces (1) (1)... are stored in the magazine (8) in a stacked state on the lifting table (1o), and the magazine (8) is stored in the magazine (8). 1) When the magazine becomes full, it is taken out and the next empty magazine is supplied onto the support stand (9) instead.

The workpieces (1) (1)... that have completed the above stamping process and are stored in the magazine (8) are then sent to subsequent processes such as the 11z frame cutting process. In some cases, it may be necessary to process the workpiece (1) with its stamped side facing down, and for such post-processing, the workpiece (1) may be turned upside down after stamping and before being stored in the magazine (8). Sometimes. This reversal of the workpiece is carried out at a fixed position on the collection rail (5), for example in Fig. 1) and Fig. 12.
This is carried out using a work reversing device (12) as shown in the figure.

A pair of work reversing devices (12) are arranged on both sides of the collection rail (5), and only one of them is shown in the drawing. In this drawing, (13) is a swinging arm arranged parallel to the − side of the collection rail (5);
) is a rotating shaft connected to the rear end of the swinging arm (13), which reciprocates the swinging arm (13) up and down by 180° in a fixed position. (15) is a retractable chuck connected to the tip of the swinging arm (13), and (16) is a chuck (15).
A chuck opening and closing means that independently opens and closes the swinging arm (
13).

Initially, the movable arm (13) is located at the solid line position in Fig. 12, and the chuck (15) at its tip is attached to the collection rail (5).
), the workpiece is reversed and opened at the fixed position P1. Then, when the workpiece (1) is fed at a fixed pitch on the collection rail (5) and carried into the fixed position P1, the chuck (15)
closes and clamps the end of the workpiece (1) from above and below. Next, the swinging arm (13) rotates 180" in the direction of the arrow in Fig. 2, and the workpiece (1), while being held by the chuck (15), is rotated 180° and placed next to the collection rail (5). is supplied onto the fixed position P2 of the chuck (1).
5) opens and separates from the workpiece (1), and the swinging arm (13
) is rotated 180° in the opposite direction and returned to the fixed position Pl, and stands by in preparation for the next reversal of the workpiece.

The workpiece reversing device (12) described above may be mechanically simple, but in order to reverse one workpiece (1) by 180", the workpiece reversing device (12) requires two fixed positions p1 and p2 before and after reversing the workpiece, and since these two positions PI and P2 are separated by a distance approximately twice the length of the swing arm (13), the workpiece There was an inconvenience in that a large space was required for reversing the workpiece in the slurping line.In addition, the swing arm (13) rotated 180° back and forth, a total of 360°, to rotate one workpiece (1 )
However, this work reversing operation is not a problem when the workpiece (1) is fed onto the collection rail (5) at a relatively low index, but it is not enough when the workpiece is fed at a high index. Therefore, it is difficult to achieve a high index with the above-mentioned work reversing device, and the range of application is narrowly limited.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a workpiece rotation device which has a simple mechanism and is capable of realizing workpiece rotation such as reversing a workpiece in a narrower space, and also enables a high index.

The technical means for achieving the above-mentioned object of the present invention includes an elevating block arranged to be movable up and down in a fixed position, and rotatably pivoted to the elevating block. a first rotating body; a second rotating body pivotally connected to the lifting block so as to be rotatable at a predetermined rotation ratio by the rotational force of the first rotating body; and rotation of the second rotating body. a chuck that is coaxially connected to a shaft and can be opened and closed to appropriately pinch a workpiece carried into a fixed position; a chuck opening/closing source fixed to the lifting block for opening and closing the chuck; and rotation of the first rotating body. The other end of the swinging lever, one end of which is fixed to the shaft, is reciprocated along a fixed arc trajectory in a direction orthogonal to the rotation axis of the first rotating body, thereby stabilizing the first rotating body via the swinging lever. It is constituted by a drive source that reciprocates in an angular range and moves the lifting block up and down via a first rotating body in parallel with this rotation.

With the above configuration, the lifting block moves up and down once with each forward or backward movement of the swing lever, and during this period, one workpiece moves up and down at a fixed position and is rotated at a predetermined angle.

Therefore, the workpiece is rotated by moving up and down at one fixed position on the conveyance line, and the space required for this workpiece rotation is small. Since it is achieved by double movement, it allows for high indexing.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 8. Incidentally, this embodiment shows one that is applicable to a device that turns the workpiece (1) upside down by 180° at a fixed position P on the recovery rail (5).

In the embodiment shown in the drawings, (]8) is a fixed base disposed below the collection rail (5), and (t9) (19) is a pair of elevating blocks disposed vertically movably on the fixed base (18). , and each has a slide shaft (2
0) Bearing (20) fixed on the fixed base (18)
21) Slideably inserted and supported by (21).

The pair of lifting blocks (19) (19) are opposed to each other, and their respective upper parts are opposed to each other on both sides of the work reversing position P of the recovery rail (5). (22) (22) is a first rotating body coaxially fixed to both ends of a rotating shaft (23) that rotatably passes through the lower part of the lifting block (19) (19). This is the first pulley. (24) (24) shown in Fig. 2 is the lifting block (
19) A pair of small-diameter second pulleys, which are second rotating bodies rotatably mounted on the upper outer surface of (19), each having an endless connection with the first pulley (22) (22) located below it. belt (25) (25), and the first pulley
(22) When (22) rotates, its rotational force is Bell)
(25) 21st-li via (25) (22)
(22), and the second pulley (22) (22) rotates as a result. (26) (26) is the lifting block (
19) On the upper inner surface side of <10), the second. Pulley (24
) (24) Rotating shaft (27) A pair of openable and closable chucks integrally fixed to (27) appropriately clamp both ends of the workpiece (1) at a fixed position P. (2
8) (28) is a chuck opening/closing source, such as a pair of first cylinders, which is fixed to the upper outer surface side of the lifting blocks (19) (19) via support brackets (19') (19'). (29) is a pair of first pulleys (22) (
(22) has one end fixed to a part of the common rotating shaft (23) and extends in a direction perpendicular to the rotating shaft (23).
) below the rotating shaft (23).
The driving source is, for example, a second cylinder, which reciprocates on a fixed circular arc trajectory in a direction perpendicular to the first cylinder. (31) is a second lever parallel to and of the same length as the first lever (29), one end of which is connected to the rotating shaft (
23) installed on a part of the fixed base (18) directly below the
2) and is rotatably attached to a support shaft (33) fixed to the lower surface of the fixed base (18), and the other end is attached to the second lever (2).
The second cylinder (30) side end of the second cylinder (30) is rotatably connected to the second cylinder (30) by a shaft (34). The tip of the piston rod (35) of the second cylinder (30) is rotatably connected to this shaft (34). The rear end of the second cylinder (30) is rotatably connected to a bottle (36) fixed on a fixed base (18), whereby the second cylinder (30)
6) is attached so that it can swing up and down using the fulcrum.

The pair of elevating blocks (19) (19) and their attachments, each Uniso 1, are the same, and the details of one unit will be explained with reference to FIGS. 1 to 6. 41st;l'
As shown in t, the radius r1 of the lower Sl pulley (22)
is twice the radius r2 of the second pulley (24) at the top, and when the first pulley (22) rotates 90 degrees, the belt (25)
The second pulley (24) is driven to rotate 180° via the second pulley (24). The rotating shaft (27) of the second pulley (24) is a pipe-like member, which rotatably penetrates the lifting block (19) via a bearing (37) as shown in Fig. 5. A chuck support frame (38) is integrally fixed to the tip of (27). The chuck (26) consists of a pair of L-shaped chuck pieces (26a) (26b), and each chuck 1-/
The center portions of the chuck pieces (26a) and (26b) are rotatably connected to the chuck support frame (38) with supports @ (39) and (39), and there is a chuck piece between each of the chuck pieces (25a) and (26b). A spring (40) is attached that always pulls (26a) and (26b) in the closing direction. In addition, the first cylinder (28) fixed to the lifting block (19) has a piston rod (41) that is connected to a vibrator-shaped rotating shaft (27).
), and as shown in FIG. Keep the chuck (24) open.

When the operation of this first cylinder (28) is stopped, the chuck piece (26a>(26b) closes as shown in FIG. 6 due to the tension spring force of the spring (40), and the piston rod (
41) retreats. These chuck pieces (26a) (26b
) connects one end of the workpiece (1) with a spring (40 mm) from above and below.
) is clamped by the tension spring force. In order to securely hold the workpiece without damaging the workpiece side, for example, rubber plates (42) (42) are fixed to the inner surface of the tip of each chuck piece (26a) (26b).

Next, the work reversing operation according to the above embodiment will be explained.

A pair of lifting blocks (19) (19) face each other at the lower limit position on both sides of the work reversing position P of the collection rail (5), and at this time, the pair of chucks (26) (26) are opened at the top and bottom of the work transport path. maintained in the state. When one workpiece (1) is carried into the workpiece reversal position P in this state, the pair of chucks (26) (26) are closed by the independent operation of their first cylinders (28) (28), and the workpiece (1) is Both ends of 1) are clamped. Next, the first
, if the second lever (29) (31) is inclined at an angle of 45° toward the second cylinder (30) as shown by the solid line in FIG. Advance the rod (35). Then, since the lower end of the second lever (31) is connected to the fixed support shaft (33), the second lever (31) is moved in response to the forward movement of the piston rod (35).
The lever (31) rotates upward using the support (33) as a fulcrum,
At the same time, the lower end of the first lever (29) also rotates upward, and the first
The lifting block (19) (19) is raised via the rotation shaft (23) of the pulley (22) (22). At the same time, since the first lever (29) is fixed to the rotating shaft (23), the rotating shaft (23) is rotated, thereby rotating the first pulley (22) (22). Then, as shown in Fig. 7, when the first and second levers (29) (31) have rotated by 15 degrees, the first and second levers (29) (
31) are lined up in a straight line, and the lifting blocks (19) (19
) rises to its maximum position. During this rise, the first pulley (22) (22) rotates by 45° and thus passes through the second pulley (24) via the bell) (25) (25).
) (24) is rotated 90 degrees, and in the same way each chuck (
26) (26) is also rotated by 90°. With this series of movements, the workpiece (1) on the collection rail (5) is moved to the chuck (26).
) It is lifted from the collection rail (5) while being held between the handles (26) and rotated by 90 degrees.

When the piston rod (35) is further advanced by the second cylinder (30), the first and second levers (29) (31) begin to bend in the opposite direction from the straight state, and therefore the lifting blocks (19) (19 ) begins to fall. However, the rotation of the first pulley (22) (22) continues through more than 45 degrees, and therefore the workpiece (1) continues to descend and rotate through more than 90 degrees. Then, as shown in Fig. 8, when the first and second levers (29) (31) have rotated further 45 degrees from the straight position and the piston rond (35) stops moving forward, the lifting blocks (19) (19) It descends to the original lower limit position, and during this time 1) - IJ (22) (2
2) is further rotated 45 degrees from the upper limit position, and the 21st-ri (
24) (24) further rotates 90" from the upper limit position. Therefore, the workpiece (1) rotates 90 degrees when rising, further rotates 90" when descending, and as a result rotates 180 degrees to the collection rail (5). ) is returned to the original work reversal position P.

Next, the chuck (26) (26) opens and the workpiece (1
), the workpiece (1) is turned 180° and sent to the next position. Then, when a new workpiece (1) is carried into the workpiece reversal position P, the chuck (26)
(26) closes and clamps a new workpiece (1).

At this time, the first and second levers (29) (31) are
The second cylinder (30) is in the position shown by the solid line in the figure.
When the piston rond (35) is moved back and forth, the lifting blocks (19) (19) begin to rise, and the first pulley (22) (22) then begins to rotate in the opposite direction.

Therefore, the new workpiece (1) has only the rotational direction opposite to the workpiece reversal operation described above, and is raised and lowered at the same time by 180 degrees.
° It is reversed and returned to the original work reversal position P.

Note that the workpiece to be rotated by the device of the present invention is not limited to a belt-shaped object such as a lead frame, and the rotation angle of the workpiece is 180°.
It can be set arbitrarily.

For example, when rotating a rod-shaped workpiece by 90 degrees using the above device, set the pulley diameter so that when the first pulley (22) (22) rotates 90 degrees, the second pulley (24) (24) rotates the same 90 degrees. It can be easily accomplished by doing so.

Further, the present invention is not limited to the structure of the above embodiment, and for example, pulleys are used for the first and second rotating bodies, but gears or the like may be used if pulleys are not suitable.

According to the present invention, the workpiece is raised and lowered from a fixed position, rotated by a predetermined angle, and returned to its original fixed position.
The space occupied by the workpiece σ-transfer device in a workpiece conveyance line or the like is reduced, and extremely effective workpiece manufacturing equipment can be provided. In addition, a series of operations of raising, lowering, and rotating the workpiece at a fixed position is performed by only one swing of the swing lever connected to the first rotating body,
When the swing lever is returned to its original position, the next workpiece can be rotated, thereby improving the index.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a work rotation device showing an embodiment of the present invention, Fig. 2 is a front view taken along line A-A in Fig. 1, and Fig. 3 is a view taken along line B-B in Fig. 2. 4 is an enlarged sectional view taken along line C-C in FIG. 2; FIGS. 5 and 6 are enlarged sectional views of a part of the device shown in FIG. 7 and 8 are cross-sectional views of the device in FIG. 3 in various operating states. Figures 9 and 10 are a plan view and front view showing an example of workpiece manufacturing equipment, Figure 1) is a partial plan view of a conventional workpiece reversing device applied to the equipment in Figure 9, and Figure 12 is a
) is a sectional view taken along line D-D in the figure. (1) - Workpiece, (19) - Lifting block, (22
) - first rotating body [pulley], (23) - rotation axis of the first rotating body, (24) - second rotating body (pulley), (
26) - Chuck, (27) - Rotating shaft of second rotating body, (28) - Chuck opening/closing source [cylinder], (2
9) - Swing lever, (30) - Drive source [cylinder].

Claims (1)

[Claims] (1) An elevating block arranged to be movable up and down in a fixed position, a first rotating body rotatably pivoted to the elevating block, and a rotational force of the first rotating body applied to the elevating block. a second rotary body pivotally mounted to be rotatable at a predetermined rotation ratio; and an openable and closable chuck coaxially connected to the rotation axis of the second rotary body to appropriately clamp a workpiece carried into a fixed position. , a chuck opening/closing source fixed to the lifting block for opening and closing the chuck; and a swing lever having one end fixed to the rotation axis of the first rotation body, the other end of which is fixed to the rotation axis of the first rotation body. The first rotating body is reciprocated in a fixed circular arc trajectory in a direction orthogonal to the oscillating lever, and the first rotating body is reciprocated within a fixed angle range via the swing lever, and in parallel with this rotation, the lifting block is moved up and down via the first rotating body. A work rotation device characterized by comprising a drive source for moving a workpiece.