JPH0811643B2 - Lead frame transport shoe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention sends a lead frame on which pellets are mounted or a lead frame with pellets to a certain process from a loader section or a certain process in an electronic component manufacturing process or the like. The present invention relates to a lead frame transfer chute for sending from an unloader unit to a unloader unit, and more particularly to a lead frame transfer chute that can quickly and easily switch the attachment site of the chute plate according to the frame width of various lead frames.

[Prior Art] A conventional lead frame transport chute 1 of this type has a chute member 2 having an approximately U-shaped cross section and extending at an appropriate length, as shown in FIG. Longitudinal grooves 4, 4 that slidably fit the outer sides of the lead frame 3 are formed on the inner surfaces of the chute member 2 that face each other in the upper opening of the chute member 2.
The lead frame 3 was fitted in between and conveyed.

Further, the other lead frame transport chute 1 ′ has the fifth
As shown in the drawing, it has a chute mounting plate 5 having an approximately U-shaped cross section and extending in an appropriate length, and the chute mounting plate 5 is mounted on the upper surfaces of both sides in the longitudinal direction of the chute mounting plate 5. There is a longitudinal groove 6 that extends the same length as the plate 5 and that is slidably fitted to the outer side of the lead frame 3 on the inner end surfaces that face each other, and at longitudinally spaced positions in the longitudinal direction. The chute plates 8 and 8 having the elongated fixing holes 7 extending orthogonally are respectively attached by inserting the fixing bolts 9 and 9 into the fixing elongated holes 7 and screwing them into the chute mounting plate 5. Grooves on chute plates 8,8
The lead frame 3 was fitted between 6 and 6 and conveyed.

Here, in general, the frame width w of the lead frame 3 has various sizes from wide to narrow as the number of leads increases and decreases depending on the type of pellets mounted on the lead frame 3. Therefore, the widths of the chutes that carry the lead frames 3 must be switched according to the frame width w of the lead frame 3.

[Problems to be solved by the invention]

However, the lead frame transport chute 1 shown in FIG.
In the above, since the chute member 2 to the concave grooves 4 and 4 are integrally formed, the chute as a whole must be replaced with another one in accordance with the frame width w of the lead frame 3. . Therefore, it takes time to replace the chute, and the work efficiency is reduced. Further, many types of lead frame transport chutes 1 have to be prepared in advance corresponding to various frame widths w, resulting in an increase in the number of parts and an increase in cost.

On the other hand, in the lead frame carrying chute 1'shown in FIG. 5, it is not necessary to completely replace the chute with another one, and the fixing bolts 9 and 9 are loosened to remove the two chute plates 8 and 8. Are displaced in the left and right directions as indicated by arrows A, B or A ', B', respectively, and then the fixing bolts 9, 9
The width of the chute may be adjusted according to the frame width w of the lead frame 3 by tightening. But,
In this case, it is difficult to accurately position the chute plate 8 immediately with respect to the frame width w of the lead frame 3 by the fixing long hole 7 and the fixing bolt 9, and after temporarily fixing the chute plate 8, the gap between the concave grooves 6 and 6 is temporarily fixed. It was necessary to perform various adjustments such as measuring the dimensions of the to make fine adjustments and to make the chute plates 8 and 8 parallel to each other. Therefore, it takes time to position and adjust the chute plates 8 and 8 and work efficiency is lowered.

Therefore, an object of the present invention is to provide a lead frame transport chute that can solve such problems.

[Means for solving problems]

Means of the present invention for solving the above-mentioned problems is to provide longitudinal grooves on the upper surfaces of both sides of the chute mounting plate in the longitudinal direction so that the outer edges of the lead frame are slidably fitted to the inner end surfaces facing each other. In a lead frame transfer chute having attached chute plates, positioning reference holes are formed at positions distant from each other in the longitudinal direction on the upper surfaces of both sides of the chute mounting plate, and in the vicinity of each positioning reference hole. Forms a screw hole for fixing the chute plate,
A plurality of width switching holes are formed at positions distant from each other in the longitudinal direction of the chute plate at positions corresponding to the frame width dimensions of various lead frames in the width direction of the chute plate.
A fixing elongated hole extending in the width direction of the chute plate is formed near the width switching hole, and the chute plate width switching hole and the chute mounting plate positioning reference hole are aligned with each other for positioning. A lead frame transfer chute in which a pin is inserted, a fixing bolt is inserted into the fixing long hole of the chute plate and is screwed into a fixing screw hole of the chute mounting plate so that the chute plate can be mounted in a switching width. Done by

[Work]

The lead frame transport chute configured as described above has a chute plate width change hole, a chute mounting plate positioning reference hole, and a positioning pin with respect to the chute mounting plate. The one-touch type positioning corresponding to the above, and the mounting width is switchably mounted on the chute mounting plate by screwing the fixing bolts.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a lead frame carrying chute 10 according to the present invention.
It is a perspective view showing an example of. This lead frame transfer chute 10 is for sending a lead frame on which pellets are mounted or a lead frame with pellets attached to it from a loader section to a certain step in an electronic component manufacturing step or the like, or from a certain step to an unloader section. The mounting plate 5 and the chute plate 8 are combined.

The chute mounting plate 5 serves as a base member for mounting a seat plate 8 which will be described later, and is formed into a long product having a substantially U-shaped cross section and extending at an appropriate length. Further, positioning reference holes 11, 11, ... Are drilled at positions separated from each other in the longitudinal direction on the upper surfaces of the projections 5a, 5b formed on both sides of the chute mounting plate 5, respectively. The positioning reference holes 11, 11, ... Are for accurately positioning the chute plate 8 described later with respect to the chute mounting plate 5. For example, a predetermined interval is provided on the center lines of the respective ridges 5a, 5b. It is opened with high precision, and a positioning pin 14 described later is inserted into the hole with high precision. Further, fixing screw holes 12, 12, ... Are formed near the positioning reference holes 11, 11 ,. The fixing screw holes 12, 12, ... Fix the chute plate 8 to be described later with respect to the chute mounting plate 5. For example, the fixing screw holes 12, 12, ... Are drilled at predetermined intervals on the center lines of the respective ridges 5a, 5b. A female screw for screwing a fixing bolt 16 described later is formed in the hole.

Chute plates 8 and 8 are attached to the upper surfaces of the projecting strips 5a and 5b formed on both sides of the chute mounting plate 5 in the longitudinal direction, respectively. The chute plate 8 supports and conveys the lead frame 3 substantially horizontally, for example, as shown in FIG. 2, and allows the outer side of the lead frame 3 to slide within the thick portions of the inner end surfaces facing each other. A longitudinal groove 6 to be fitted is formed. A plurality of width switching holes 13, 13, ... Are bored at positions spaced apart in the longitudinal direction of the plate surface of the chute plate 8. This width switching hole 13,13,
Denotes that the chute plate 8 can be accurately positioned with respect to the chute mounting plate 5 to switch the mounting width, and corresponds to the size of the frame width w of various lead frames 3 in the width direction of the chute plate 8. For example, three holes are accurately formed at these positions, and the positioning pins 14 are inserted into these width switching holes 13, 13, ... With high accuracy. In addition, the chute plate 8 of the width switching hole 13
The distance between the holes in the longitudinal direction is equal to the distance between the positioning reference holes 11, 11 formed on the upper surface of the projecting strips 5a, 5b of the chute mounting plate 5 at a predetermined distance.
.. are provided in the vicinity of the width switching hole 13 formed at a distance from the chute plate 8, and fixing slots 15, 15 ,. These fixing slots 15, 15, ... Fix the chute plate 8 to the chute mounting plate 5 in such a manner that the mounting width can be switched. The width changing holes 13, 13, ... Are formed into an oval shape that extends at least as long as the entire width, and the fixing bolt 16 is inserted into the hole. The length of the fixing slots 15 formed in the chute plate 8 in the longitudinal direction is determined by a fixing screw formed on the upper surfaces of the projecting ridges 5a and 5b of the chute mounting plate 5 at a predetermined interval. It is equal to the distance between the holes 12, 12.

Then, as shown in FIG. 2, one of the width switching holes 13 of the chute plates 8 and 8, for example, the middle width switching hole 13 and the positioning reference hole 11 of the ridges 5a and 5b of the chute mounting plate 5 are provided. , 11 respectively, and the positioning pins 14 are respectively inserted into these holes 13, 11 to position the mounting width of the chute plates 8, 8 and then, as shown in FIG.
By inserting the fixing bolts 16,16, ... into the fixing long holes 15,15, ... of the 8,8 and screwing them into the fixing screw holes 12,12 ,. , 8 are attached to the chute mounting plate 5 according to the frame width w ₁ of the lead frame 3 to be transported, and the lead frame transport chute 10 is assembled.

The lead frame transport chute 10 configured as described above
In FIG. _1, if the frame width of the lead frame 3 to be transported is increased from w ₁ to w ₂ (see FIG. 3), first loosen the fixing bolt 16 shown in FIG. 1, and then
The positioning pin 14 shown in FIG. 2 is removed. In this state,
The chute plates 8 and 8 located on the upper surfaces of the ridges 5a and 5b of the chute mounting plate 5 are pulled out, for example, to the outside, and the innermost width switching hole 13 is attached to the chute as shown in FIG. The ridges 5a, 5b of the plate 5 are aligned with the positioning reference holes 11, 11 and the positioning pins 14 are inserted into these holes 13, 11 to position the mounting width of the chute plates 8, 8. At this time, assuming that the innermost width switching hole 13 is formed at a position corresponding to the size of the frame width w ₂ of the lead frame 3 to be conveyed this time, the chute plates 8 and 8 are formed. The dimension between the concave grooves 6 formed on the inner end surface is equal to the frame width w ₂ . Thereafter, as shown in FIG. 1, the fixing bolts 16, 16, ... Are inserted into the fixing long holes 15, 15, .. Screw to 12, ... This allows the chute plate 8,
8 can be attached to the chute attachment plate 5 by switching the attachment width to the frame width w ₂ of the lead frame 3 to be conveyed this time in a one-touch type.

1 to 3, the width switching hole 13
In the above, three chute plates 8 are provided in the width direction, but the present invention is not limited to this, and two or four or more chute plates may be provided.

〔The invention's effect〕

Since the present invention is configured as described above, the chute mounting plate 5 is provided with the chute plate 8 width switching hole 13, the positioning reference hole 11 and the positioning pin 14 of the chute mounting plate 5,
The chute plates 8 and 8 can be positioned in a one-touch manner in accordance with the frame widths of various lead frames 3 (for example, w ₁ and w ₂ ), and the fixing bolt 16 is passed through the fixing slot 15 to fix the fixing screw hole 12 It can be attached to the chute mounting plate 5 by being screwed to the switchable mounting width. Therefore, the mounting width of the chute plates 8 can be switched quickly and easily according to the frame width of the various lead frames 3. Also, after attaching the chute plates 8,8,
Since fine adjustment of the mounting width and other various adjustment operations are unnecessary and can be used immediately, the work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a lead frame transport chute according to the present invention, FIG. 2 is a sectional explanatory view showing a mounting state of a chute plate to a chute mounting plate, and FIG. Sectional explanatory view showing a state, 4th
FIG. 5 is a sectional explanatory view showing a first conventional example of a lead frame transport chute, and FIG. 5 is a sectional explanatory view showing a second conventional example. 3 ... Lead frame, 5 ... Chute mounting plate, 6 ...
Recessed groove, 8 ... Chute plate, 10 ... Lead frame transfer chute, 11 ... Positioning reference hole, 12 ... Fixing screw hole,
13 …… Width switching hole, 14 …… Locating pin, 15 …… Fixing slot, 16 …… Fixing bolt, w ₁ , w ₂ …… Frame width.

Claims (1)

[Claims] 1. A chute plate having longitudinal grooves for slidably fitting the outer edges of lead frames on opposite inner end surfaces is attached to the upper surfaces of both sides of the chute mounting plate in the longitudinal direction. In the lead frame transport chute, positioning reference holes are formed on the upper surfaces of both sides of the chute mounting plate at positions distant from each other in the longitudinal direction, and screw holes for fixing the chute plate are provided near the positioning reference holes. And forming a plurality of width switching holes at positions distant from each other in the longitudinal direction of the chute plate at positions corresponding to the frame width dimensions of various lead frames in the width direction of the chute plate. A fixing elongated hole extending in the width direction of the chute plate is formed near the width switching hole, and the chute plate width switching hole is aligned with the positioning reference hole of the chute mounting plate. The chute plate is mounted so that the mounting width can be switched by inserting a positioning pin into the operator and inserting the fixing bolt through the fixing long hole of the chute plate and screwing it into the fixing screw hole of the chute mounting plate. Lead frame transport chute characterized by.