JPH03232628A - Magazine conveying device - Google Patents

Abstract

PURPOSE:To uniformly set the widthwise center axes of magazines even having different widths by providing a regulating mechanism for simultaneously moving a pair of guide rails toward the widthwise center of a magazine by equal distances, on a guide on which at least one pair of guide rails stand so as to clamp the magazine widthwise thereof. CONSTITUTION:There is provided an elevating mechanism 16 comprising a guide for vertically guiding a magazine 2 and arms 27 for conveying the magazine 27 along the guide. Screw shafts (regulating mechanism) 14, 15 for simultaneously moving a pair of guide rails 12, 13 by equal distances toward the widthwise center of the magazine, are provided on the guide having at least one pair of upright standing guide rails 12, 13 for clamping the magazine 2. With this arrangement, the space between the guide rails 12, 13 may be easily adjusted by the screw shafts 14, 15, and the space adjusted to the width of the magazine 2 is uniform with respect to the center axis of the magazine 2 in the direction of the width W thereof.

Description

[Detailed Description of the Invention] [Summary] Regarding a device that vertically conveys a plurality of magazines capable of storing required parts in multiple stages in the vertical direction, the versatility for magazines with different width dimensions is improved and required parts can be taken in and out of the magazines. An elevator mechanism that has a guide that guides the vertical movement of the magazine and an arm that transports the magazine along the guide, with the aim of eliminating the need for adjustment and speeding up the storage or removal of required parts. At least one pair of guide rails stand upright so as to sandwich the magazine in the width direction, and the guide includes an adjustment mechanism for moving the pair of guide rails by the same amount and simultaneously toward the center of the magazine in the width direction. Alternatively, one side of the guide is provided with two elevator mechanisms that move back and forth toward the guide, and an intermediate portion provided on the elevator mechanism that moves up and down alternately. The arm, which is rotatably supported, has a magazine mounting part extending from the middle part to one side and on which the magazine is mounted, and a magazine mounting part extending from the middle part to the other side and having the magazine mounted therein. A weight that flips up the magazine mounting section when the magazine is not loaded is provided, and a stopper that pushes up the other arm is provided at a portion where the magazine is mounted on the magazine mounting section, and the other arm is mounted on the stopper. The second feature is that the magazine mounting section is in a substantially horizontal position when pushed up; It is characterized by having the second feature.

[Industrial application field]

The present invention improves the configuration of a magazine transport device that vertically transports a magazine that stores a plurality of required parts in multiple stages in the vertical direction, and in particular improves the versatility for magazines with different width dimensions when storing or taking out required parts from the magazine. The present invention also relates to a configuration that speeds up the storage or removal of required parts.

[Conventional technology]

When manufacturing various products, semi-finished products and assembled parts are transported between processes by humans, robots, self-propelled vehicles, etc.; however, in the manufacture of semiconductor devices, etc.
A magazine is used that accommodates multiple required parts.

FIG. 5 is a perspective view of a magazine that accommodates a plurality of connected lead frames.

In the manufacture of semiconductor devices, a stage on which a semiconductor chip is mounted and a lead frame on which a large number of leads connected to the semiconductor chip mounted on the stage are formed are used for mounting the semiconductor chip (die bonding) and connecting the chip and the leads. In the connection process, etc., a plurality of (for example, five) lead frames are housed in a connected state and transported in a magazine.

In FIG. 5, a magazine 2 that accommodates a plurality (for example, 50 pieces) of connected lead frames (required parts; hereinafter referred to as lead frames) 1 in multiple stages in the vertical direction has a plurality of grooves 3 on the left inner surface and the right inner surface. is provided, each lead frame l
is accommodated so as to pass between the groove 3 on the left inner surface and the groove 3 on the right inner surface.

In such a magazine 2, the width of the lead frame 1 varies depending on the type of semiconductor device, and therefore various widths W of the magazine 20 are used.

In a die bonder that mounts a semiconductor chip on a lead frame 1, for example, a conventional magazine transport device that transports a magazine 2 in the vertical direction in order to accommodate the lead frame 1 on which a semiconductor chip is mounted in the magazine 2 is as follows:
The magazine 2 is positioned by setting one side thereof, for example, the front lower side 4 in FIG. 5, in a fixed position. Therefore, as shown by the broken line in the figure, the magazine 5, which is wider than the magazine 2, has its center axis in the width direction shifted from the magazine 2 in the direction of the arrow.

[Problem to be solved by the invention]

As explained above, the conventional magazine transport device that is incorporated into a die bonder or the like and transports the magazine 2 in the vertical direction can
The position of the center axis in the width direction of the required part changes.

Therefore, when loading and unloading the lead frame 1 into the magazine 2, the lead frame transport 411 that holds and moves the lead frame 1 horizontally needs to be readjusted if the width dimension of the lead frame l differs.

In addition, since the conventional magazine conveyance device has one elevator mechanism that conveys the magazine in the vertical direction, the used magazine 2 from which the lead frame 1 has been housed or taken out is removed from the elevator mechanism, and then the new magazine is transferred.
It came to be equipped with an elevator mechanism.

The time required to replace a used magazine mounted on such an elevator mechanism with a new magazine is generally about 10 to 20 seconds. For example, when this magazine conveying device is applied to a Guibonder, the time required to replace the magazine is approximately 10 to 20 seconds. Since the bonding operation stops completely, the 10 to 20 seconds becomes a loss time for the entire device.

An object of the present invention is to improve versatility for magazines with different width dimensions and to reduce loss time associated with magazine exchange.

[Means for Solving the Problems] The present invention is based on a first embodiment showing a main part of the embodiment as a schematic plan view.
According to the figure, in a device 11 that vertically conveys a magazine 2 that can accommodate required parts (lead frames) 1 in multiple stages in the vertical direction, there is a guide that guides the vertical movement of the magazine 2, and a magazine that moves along the guide. At least one pair of guide rails 12.13 stand upright so as to sandwich the magazine 2 in the width direction. The first feature of the present invention is that it is provided with an adjustment mechanism (female thread of guide rail 12, 13 and threaded shaft 14° 15) for moving the same amount and simultaneously toward the center of the width W direction. According to FIG. 3, which shows the main parts of another embodiment together with a schematic plan view, in a device 41 for vertically conveying a magazine 2 capable of accommodating required parts (connected lead frames) 1 in multiple stages in the vertical direction, On one side of the guide that guides the vertical movement of the magazine 2, there are two elevator mechanisms 16a that move back and forth toward the guide.
The arms 42 and 43, which are provided on the elevator mechanisms 16a and 16b and are rotatably supported by the intermediate parts 42a and 43a, have a magazine 2 extending to one side from the intermediate parts 42a and 43a. Magazine mounting section 42 in which is mounted
b, 43b, and a weight 42b that extends from the intermediate portions 42a, 43a to the other side and flips up the magazine mounting portions 42b, 43b when the magazine 2 is not mounted on the magazine mounting portions 42b, 43b.

43b, and stoppers 48a and 48b for pushing up the other arm 42 and 43 are provided at the portion where the magazine 2 is mounted on the magazine mounting portions 42b and 43b, and the stopper 48a,
A second feature of the present invention is that when the other arm 42.43 is pushed up by the arm 48b, the arm 42.43 is in a substantially horizontal position. This is achieved by a device having at least one of the following features.

[Effect]

Due to the first feature of the above means, even if the widths of the magazines are different, the center axis of the required parts stored in the magazines in the width direction remains constant, so that the mechanism for storing or taking out the required parts in the magazines can be adjusted without adjustment. maintenance is simplified.

Moreover, the second feature of the above means reduces the conventional loss time of storing required parts in a magazine or taking out required parts stored in a magazine, and improves the actual operating efficiency of the apparatus.

Furthermore, by combining the first and second features, it is possible to eliminate the need for adjustment of the mechanism for storing or taking out required parts in the magazine, simplify maintenance, and improve the actual operating efficiency of the device.

[Embodiment] A magazine conveying device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 11 is a plan view schematically showing the main parts of a magazine conveying device according to an embodiment of the present invention, and FIG. 2 is a side view of the main parts of the device shown in FIG. 1 in an assembled state when viewed from the direction of arrow A. .

In FIG. 1, a magazine transport device 11, which is installed in a die bonder and accommodates a lead frame loaded with semiconductor chips from the side of a magazine 2 that is rising, has guide rails that guide the two front corners of the magazine 2 in the vertical direction. 12 and
A guide rail 13 that guides the rear two corners of the magazine 2 in the vertical direction, a screw shaft 14 for adjusting the spacing between the guide rails 12 and 13 facing each other in the width W direction of the magazine 2 at the left end of the magazine 2, A screw shaft 15 for adjusting the opposing distance between guide rails 12 and 13 facing each other in the width W direction of the magazine 2 at the right end of the magazine 2, and a guide rail 12.1.
Elevator mechanism 16 for lifting the magazine 2 along 3
has.

The screw shaft 14 has a right-hand thread 14a that is threaded into a right-hand female thread that passes through the guide rail 12, a left-hand thread 14b that threads into a left-hand female thread that passes through the guide rail 13, and an elevator mechanism 1.
It has a right-hand thread 14c screwed into a right-hand female thread passing through a bearing member 17 protruding from the left end surface of the shaft 6, and a knob 18 for rotating the screw shaft 14 is fixed to the front end thereof.

The screw shaft 15 has a right-hand thread 15a that is screwed into a right-hand female thread that passes through the guide rail 12, and a left-hand thread 15b that is screwed into a left-hand female thread that passes through the guide rail 13. A knob 19 is fixed.

In the screw shafts 14 and 15, the leads of the right-hand thread 14a, left-hand thread 14b, right-hand thread 14c, right-hand thread 15a, and left-hand thread 15b are all the same.

The elevator mechanism 16 includes a base 21 that moves back and forth (moves up and down in the figure) along a pair of rails 20, a guide shaft 22 that stands upright from the base 21, a screw shaft 23 that stands upright from the base 21, and a guide shaft. Bush 25 and screw shaft 2 that fit into 22
3 and a pair of arms 27 that protrude forward from the elevator member 24, and the bearing member 17 is fixed to the base 21.

A drive mechanism provided on the base 21 to move the elevator member 24 up and down includes a motor (for example, a reversible motor) 28 that can rotate in forward and reverse directions, and a pulley 29 that is rotated by the motor 28. Belt 30. Consisting of pulley 31, pulley 3
1, the screw shaft 23 rotates, and the elevator member 24 moves up and down due to this rotation.

Further, the elevator member 24 and the guide rail 12 are configured to always maintain a constant interval even when the screw shaft 14 is rotated,
Therefore, the arm 27, which is formed in a length that supports the magazine 2 over its entire width, always supports the magazine 2 over its entire width.
Become a supporter.

In the device 11 configured in this manner, the opposing distance between the guide rails 12 and 13 can be easily adjusted using the screw shafts 14 and 15, and the opposing distance adjusted to match the width W of the magazine 2 is the same as that of the magazine 20. The central axis in the width W direction remains unchanged.

Therefore, the mechanism for taking out a lead frame from the magazine 2 that is being moved up and down by the device 11 or for storing the lead frame in the magazine 2 only needs to perform a predetermined operation regardless of the width of the magazine 2. become.

In FIG. 2, a pair of rails 20 are fixed to the upper surface of the device bed 32, and a base 21 moves along the rails 20.
On top of the motor support plate 52. A motor 28 supported via a plurality of legs 55 and a support fitting 56 that supports the screw shaft 23 rotatably and upright are attached, and are supported by a pair of bearing members 17 and 34 protruding from the front end surface of the base 21. , a screw shaft 14 is rotatably supported.

At the upper end of the support metal fitting 56, a support metal fitting 57 protrudes laterally.
The screw shaft 38, which is rotatably supported by the support fitting 57, has a right-hand thread 38 with the same pitch as the screw 14a.
a, the guide rail 12 and the screw 1, which have a left-hand thread 38b with the same pitch as the screw 14b, and the screws 14a and 38a are screwed together;
4b and 38b are screwed together, the guide rail 13 has a threaded shaft 1.
4 and 38.

The screw shaft 14 has a pulley 35 between the screw 14a and the knob 18.
is attached to the screw shaft 38, and a pulley opposite to the pulley 35 is mounted on the screw shaft 38.
1J36 is installed, and belt 37 is attached to pulleys 35 and 36.
is set up.

In such a device 11, when the knob 18 is rotated, the screw shafts 14 and 38 are rotated in the same direction, and as a result of this rotation, the distance between the guide rails 12 and 13 is adjusted to a size that guides the corner of the magazine 2 that is being moved up and down. is set to
The tip of the arm 27 protruding from the elevator member 24 that moves up and down on the screw shaft 23 maintains a fixed position with respect to the guide rail 12.

Therefore, the rotation of the motor 2 is controlled by a disk 531 fixed to the pulley 29 and a photo sensor 54 attached to the leg 55.
8, the elevator member 24 moves up and down, and the magazine 2 mounted on the arm 27 moves along the guide rail 12.
．． 13 in the vertical direction.

FIG. 3 is a plan view schematically showing the main parts of a magazine conveying device according to another embodiment of the present invention.

In FIG. 3, in which the same reference numerals are used for parts common to the device 11, a magazine transport device 41, which is installed in the die bonder and accommodates lead frames loaded with semiconductor chips from the side of the magazine 2 which is rising, is located at the top and bottom of the magazine 2. a pair of screw shafts 14 and 15 that adjust the opposing distance between the guide rails 12 and 13;
It has two elevator mechanisms 16a, 16b for lifting the magazine 2 along guide rails 12.13.

The elevator mechanisms 16a and 16b have a pair of rails 20.
A protruding member 17 is provided on a base 21 that moves back and forth along the left end surface of the base 21, and has a right-handed thread formed thereon that engages with the right-handed thread 14c.

Elevator mechanism 1 that moves up and down behind the magazine 2
6a is an elevator member 24a having a guide shaft 22a that stands upright from the base 21, a screw shaft 23a that stands upright from the base 21, a bush 25a that fits into the guide shaft 22a, and a female thread 26a that screws into the screw shaft 23a. , and a pair of arms 42 projecting forward from the elevator member 24a.

The elevator mechanism 16b that moves up and down behind the elevator mechanism 16a has a guide shaft 22 that stands upright from the base 21.
b, a screw shaft 23b standing upright from the base 21, an elevator member 24b having a bush 25b that fits on the guide shaft 22b, and a female screw 26b that screws on the screw shaft 23b; and an arm 43.

The arms 42 and 43 are rotatably supported at intermediate portions 42a and 43a, and the front (one) of the intermediate portions 42a and 43a is a magazine mounting portion 42b or 43b1, and the rear (other) of the intermediate portions 42a and 43a is a magazine mounting portion. Weights 42c and 43c for flipping up arms 42 and 43 that are not equipped with
It is.

The base 21 is provided with a pair of drive mechanisms consisting of a motor, a pulley, and a belt that rotate the screw shafts 23a and 23b in forward and reverse directions, respectively, but these have the same configuration as the drive mechanism in the device 11. , the drive mechanism is omitted in FIG.

FIGS. 4(A) to 4(H) are explanatory views of the operation of the magazine conveying device shown in FIG. 3.

In FIG. 3, which schematically shows a device 41 for storing a lead frame in the magazine 2 that is being raised, 45 is a mounting table for the device 41, 46 is a magazine supply table, 47 is a magazine pedestal in which the lead frame is housed, 48a, 48b is arm 4
2.43 is a stopper for leveling the magazine mounting portions 42b and 43b; 49 is a pusher for pushing out empty magazines 2a one by one from the magazine supply stand; 50 is a pusher for transferring the magazine 2b already housed in the lead frame to the cradle 47; .

In FIG. 4(a), before the start of operation, the device 41, which has a plurality of empty magazines 2a (three in the figure) mounted on the magazine supply table 46, has the elevator members 24a and 24b lowered, and in that state, the weight 42c and 43c are stoppers 48a
Alternatively, the magazine mounting portions 42b and 43b of the arms 42 and 43 that abut against the arm 48b are horizontal.

Therefore, if the pusher 49 pushes the empty magazine 2a as shown in FIG. 4(0), the most advanced empty magazine 2a
a is mounted on the magazine mounting section 43b and the guide rail 1
3.

Next, as shown in FIG. 4(c), when the elevator member 24b is raised along the guide shaft 22b, the horizontality of the magazine mounting portion 42b is maintained due to the weight of the magazine 2a mounted on the magazine mounting portion 43b. The arm 43 rises together with the elevator member 24b and the guide rail 1
A plurality of continuous lead frames 1 are sequentially housed in the empty magazine 2a from above at appropriate predetermined positions in the empty magazine 2a, which is being raised by the guide 2.13.

After the lead frame 1 has been housed, the magazine 2b is ejected above the guide rail 12.13 by the elevator member 24a, as shown in FIG. 4(d). Alternatively, prior to the ejection, the pusher 49 loads the next empty magazine 2a onto the magazine mounting portion 42b, and comes into contact with the guide rail 13.

Next, as shown in FIG. 4(N), when the pusher 50 transfers the magazine 2b containing the lead frame to the pedestal 47, the arm 43 is moved to the magazine mounting portion 43 by the weight 43c.
b is flipped up, while the second empty magazine 2a
The elevator member 24a mounted on the magazine mounting portion 42b of the arm 42 begins to rise along the guide shaft 22a.

Then, as the elevator member 24a rises, the lead frame 1 is stored in the second empty magazine 2a, and as shown in FIG. During the extraction, the elevator member 24b moves down, and the weight 43c comes into contact with the stopper 48a, so that the arm 4 becomes horizontal.
The third empty magazine 2 is placed in the third magazine mounting section 43b.
A is installed.

Next, as shown in FIG. 4(G), when the second magazine 2b housed in the lead frame is transferred to the pedestal 47 by the pusher 50, the magazine mounting portion 42b of the arm 42 is flipped up by the weight 42c, and the third magazine 2b is lifted up by the weight 42c. Elevator member 24b with empty magazine 2a mounted on arm 43
begins to rise.

Then, as shown in FIG. 4 (H), the elevator member 2
As the weight 4a descends, the magazine mounting portion 42b of the arm 42, where the weight 42c contacts the stopper 48a, returns to the horizontal position.
The third magazine 2b containing the lead frame is pulled out above the guide rail 12.13.

In the device 41 configured in this manner, the opposing distance between the guide rails 12 and 13 can be easily adjusted using the screw shafts 14 and 15, and the opposing distance adjusted to match the width W of the magazine 2 is By keeping the width W (direction 0) unchanged and by operating the two elevator mechanisms alternately, the conventional loss time is reduced and the lead frame can be accommodated more efficiently.

〔Effect of the invention〕

As explained above, the magazine conveying device according to the present invention has the following features:
In order to keep the center axis in the width direction constant even if the width of the magazine (required parts) differs, the mechanism for storing or taking out the required parts into the magazine is no longer adjustable, simplifying maintenance. The conventional loss time of accommodating or taking out required parts accommodated in a magazine is reduced, and the effect of improving the actual operating efficiency of the device is obtained.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of the main parts of a device according to an embodiment of the present invention, FIG. 2 is a side view of the main parts of the device shown in FIG. 1 in an assembled state when viewed from the direction of arrow A, and FIG. FIG. 4 is an explanatory diagram of the operation of the device shown in FIG. 2, and FIG. 5 is a perspective view of a magazine. In the figure, 1 is a lead frame (required parts), 2.2a and 2b are magazines, 11.41 is a magazine transport device, 12 and 13 are guide rails, 16, 16a and 16b are elevator mechanisms, and 24.24
a, 24b are elevator members, 27, 42, 43 are arms, 42a, 43a are intermediate parts of arms, 42b, 43b magazine mounting part of arm, 42c,
43c is the weight of the arm, 48a and 48b are stoppers, / An example of Z8 Zenaki Nanarigi (=Study style plan view of part i of the device according to Fig. 79) The main parts of the device shown in Fig. 1 are indicated by arrows. Side view of the assembled state seen from the direction Figure 2! II 7 Kaji / # 伎 1 LLIL Figure 3 shows the T:M position and movement diagram.

Claims (3)

[Claims] (1) A device that vertically conveys a plurality of magazines (2) that can store required parts (1) in multiple stages in the vertical direction, and includes a guide that guides the vertical movement of the magazines (2) and a guide that guides the vertical movement of the magazines (2). An arm (27) for transporting the magazine (2) along
), and the guide includes at least a pair of guide rails (12, 13) standing upright so as to sandwich the magazine (2) in the width direction. 13) A magazine conveyance device comprising an adjustment mechanism that moves the magazines (2) by the same amount and simultaneously toward the center in the width direction of the magazine (2). (2) One side of the guide is provided with two elevator mechanisms (16a, 16b) that move forward and backward toward the guide,
The elevator mechanism (16a, 16b) moves up and down alternately.
The arms (42, 43) are provided with intermediate portions (42a, 43a) that are rotatably supported.
a, 43a) on one side and on which the magazine (2) is mounted; weights (42b, 43b) that flip up the magazine mounting portion (42b, 43b) when the magazine (2) is not mounted on the magazine mounting portion (42b, 43b);
) is provided with a stopper (48a, 48b) that pushes up the other arm (42, 43),
The arm (42, 43) is attached to the stopper (48a, 48b).
) is pushed up, the magazine mounting section (42
b, 43b) are arranged in a substantially horizontal position. (3) The magazine conveying device according to claim 1, comprising two elevator mechanisms (16a, 16b) having the arms (42, 43) according to claim 2 and stoppers (48a, 48b). A magazine conveying device characterized by: