JPH06156723A - Magazine carrying mechanism - Google Patents

Abstract

PURPOSE:To reduce the generation of dust and eliminate the happening of trouble in the carrying by arranging plural carrying rollers each having a nearly horizontal rotary shaft, which nearly orthogonally crosses the direction of the carrying route, along the carrying route. CONSTITUTION:One end of each rotary shaft 7 is projected outside through a side piece 6a of a roller support body 6, and a pulley 8 is fixed to the projecting end thereof. Carrying rollers 9 are fixed to both ends of each rotary shaft 7 at a part between side pieces 6a, 6b. When a motor 14 is rotated, these carrying rollers 9 are rotated in the same direction to carry a magazine. Guide wheels 16 are provided to guide the magazine to be carried by the carrying rollers so that it does not run-off. A danger of the generation of dust by a contact of a belt 12 and the guide 16 is eliminated to prevent the generation of the condition that carrying is impossible by the idle rotation of the belt 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magazine transport mechanism, and more particularly to a magazine transport mechanism for a wire bonding device that transports a semiconductor device mounted lead frame storage magazine.

[0002]

2. Description of the Related Art Generally, a plurality of (for example, 20) transfer (loading and unloading) of a wire bonding semiconductor device-equipped lead frame to a wire bonding device is performed.
The magazine is carried out in units of magazines each containing 25, 50, etc. lead frames. FIG. 7 is a perspective view showing an example of a semiconductor device mounting lead frame for which wire bonding has been completed.

Then, as a wire bonding system of a method of transporting in a magazine unit, Japanese Patent Laid-Open No. 24565/1992.
There is one introduced by the publication No. 1. It is a device in which a plurality of wire bonding devices having a transfer path are arranged in a straight line so that all the transfer paths are in communication to form one long transfer path.

Further, a belt type magazine conveying mechanism in which a pair of rotating rollers which are spaced apart from each other are belted is provided in the conveying path of each wire bonding apparatus.

[0005]

By the way, JP-A-4-
The conventional magazine transport mechanism introduced in No. 245651 has the following problems due to the belt system. First of all, since the belt always tries to shift to one side during conveyance, guides are required on both the left and right sides so that the belt does not shift. There is a problem that dust is generated. Also,
There is a case where an iron plate or the like is provided in the lower part of the belt to suppress the sagging of the belt, but in this case as well, the belt and the iron plate or the like come into contact with each other to generate dust due to friction. It is arguable that it is a great enemy to.

Secondly, if the rotation axes of a pair of rollers looped around the belt are broken even slightly, the belt shift becomes large, and the belt rotation is stopped (that is, the belt is idle). There was also.

The present invention has been made to solve the above problems, and it is an object of the present invention to provide a novel magazine transport mechanism for a wire bonding apparatus, which produces little dust and does not cause troubles that hinder transport. To aim.

[0008]

According to another aspect of the present invention, there is provided a magazine transport mechanism, wherein a plurality of transport rollers are arranged along a transport path, the rotation axis of which is substantially horizontal and which is oriented substantially orthogonal to the direction of the transport path. It is characterized by A magazine carrying mechanism according to a second aspect of the present invention is the magazine carrying mechanism according to the first aspect, wherein a plurality of carrying rollers are provided in parallel on each rotation shaft.

According to another aspect of the present invention, there is provided a magazine transporting mechanism.
Alternatively, in the magazine transport mechanism of No. 2, at least the surface portion of the transport roller is made of elastic resin. A magazine transporting mechanism according to a fourth aspect is the magazine transporting mechanism according to the first, second or third aspect, wherein at least a surface portion of the transporting roller is formed of a conductive material.

[0010]

According to the magazine transport mechanism of the first aspect, the magazine is transferred by the transport rollers arranged along the transport path, and there is no risk of dust generation due to contact between the belt and the guide. Also, there is no fear that the belt will be idle and may not be conveyed. According to the magazine transport mechanism of claim 2, since a plurality of transport rollers are arranged in parallel on one rotation shaft, the width of each transport roller can be small even if the width of the transported magazine is wide. You don't have to face the problem of being difficult to manufacture.

According to the magazine transporting mechanism of the third aspect, since at least the surface portion of the transporting roller is made of elastic resin, it is possible to reduce vibrations and impacts which the transporting roller gives to the magazine during transporting, and to extend. Vibration and impact on the lead frame and the semiconductor element housed in the magazine can be reduced. According to the magazine transport mechanism of claim 4, since at least the surface portion of the transport roller is made of conductive resin, the transport roller is charged by the contact between the transport roller and the magazine, and the semiconductor element on the lead frame is transferred to the semiconductor element via the magazine. It is possible to prevent static electricity from being transmitted to the semiconductor element and causing electrostatic breakdown.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The magazine transport mechanism of the present invention will be described in detail below with reference to the illustrated embodiments. 1 to 6 are for explaining one embodiment of a magazine carrying mechanism of the present invention, and FIG. 1 is a perspective view showing an entire wire bonding system equipped with the magazine carrying mechanism. First, referring to FIG. The outline of the wire bonding system will be described.

[0013] Reference numerals 1, 1, ... Are wire bonding devices having substantially the same structure and function, each having a magazine transport mechanism 2 on the front side. Wire bonding equipment 1, 1, ...
Are arranged side by side so that the respective magazine transport mechanisms 2, 2, ... Align to form a single transport path. Reference numeral 3 denotes a magazine take-in section for taking the magazine of each wire bonding apparatus 1 near the wire bonding section. The magazine transport mechanisms 2, 2, ... Are each covered with a cover.

4a is a wire bonding apparatus 1, 1, ...
An automatic loading station for supplying a magazine from one end thereof to a magazine conveying path consisting of 5 is an automatic wiring inspection device for inspecting the wiring shape of the lead frame of the magazine which has completed the wire bonding process, 4b.
Is an automatic unloading station for taking out the magazine which has undergone the inspection process by the automatic wiring inspection device 5.

FIG. 2 is an enlarged perspective view of the magazine transport mechanism. Next, the magazine transport mechanism 2 will be described in detail with reference to FIG. Reference numeral 6 denotes a roller support, which has a U-shaped cross section and is provided substantially horizontally so that the pair of side pieces 6a and 6b face upward and the intermediate piece forms a bottom portion. A plurality of rotating shafts 7, 7, ... Are rotatably attached to the upper portions of 6a, 6b at substantially regular intervals. This interval is set to be at least smaller than the length of the magazine.

One end of each of the rotary shafts 7, 7, ... Penetrates the side piece 6a of the roller support 6 so as to project to the outside (front side), and a pulley 8 is fixed to each of the projecting ends. ing. Then, the side pieces 6a of the rotary shafts 7, 7, ...
Conveyor rollers 9 are fixed to both ends of the portion between 6b.

A rotary support 10 is rotatably attached to one end (right end) of the roller support 6. Similarly to the roller support body 6, the rotation support body 10 has a rotating shaft 7,
, ..., pulleys 8, 8, ... And conveyance rollers 9, 9 ,.
The rotary support 10 and the roller support 6 compose one transport path in the folded state as shown in the figure, but when the rotary support 10 is rotated by approximately 90 degrees to be oriented, It is designed to be able to perform maintenance and other work by cutting a part of it to allow the hands and body to enter. Reference numerals 11 and 11 are stoppers that define the rotation angle of the rotation support body 10.

Reference numerals 12 and 12 denote belts wound around pulleys 8, 8 fixed to one end of each of the rotary shafts 7 of the roller support 6 and the rotary support.
By rotating 2 the conveying rollers 9,
The magazines 9 can be rotated to convey the magazine.
In addition, 13, 13, ... Are idle cars. 14 is a motor,
The rotation of the belt 12a, the transmission roller 15 and the belt 1
It is transmitted to the belt 12 on the side of the roller support 6a via 2b, and is transmitted to the belt 12 on the side of the rotation support 10 via the belt 12a, the transmission roller 15 and the belt 12c.

Therefore, the roller support 6 and the rotary support 1
0 of the transport rollers 9, 9, ... When the motor 14 rotates,
They can all rotate in the same direction and thus carry magazines. .. are guide wheels, which are rotatably attached to respective support shafts.
The support shafts of the guide wheels 16, 16, ... Are side pieces 6a, 6b and 10a of the roller support body 6 and the rotation support body 10, respectively.
They are planted on the upper end surface of 10b at appropriate intervals.

The guide wheels 16, 16, ... Are conveying rollers 9,
It plays the role of guiding the magazines conveyed by 9, ...

FIG. 3 illustrates the transfer of the magazine between the magazine transport mechanism 2 and the wire bonding section of the wire bonding apparatus. Reference numerals 17 and 17 denote magazine lifting members, which are driven by an elevator groove (not shown) and lifted a magazine 18 on the magazine transport mechanism 2 to transfer it to the transport arms 19 and 19 that can move forward and backward, or conversely from the transport arms 19 and 19. It plays the role of receiving 18 and soft landing on the magazine transport mechanism 2. In the normal state, the rollers are retracted to a position lower than the conveying rollers 9, 9, ....

FIG. 4 shows the guide wheel 1 as seen along the arrow A in FIG.
6 is a view for explaining the function of No. 6 in FIG. Reference numeral 20 is a support shaft that rotatably supports the guide wheel 16, and the lower end portions of the support shaft 16 are side pieces 6a and 6b of the roller support body 6 and the rotation support body 10, respectively.
It is planted on the upper end surfaces of 10a and 10b.

FIG. 5 shows a magazine 18 different from that of FIG.
FIG. 7 is a view taken in the direction of arrow when transporting. There are various lead frames of various widths, and it is necessary that the magazine transport mechanism 2 be able to handle various lead frames of different widths. Therefore, the magazine transport mechanism 2 is constructed so as to be able to transport a magazine capable of accommodating the widest lead frame among those to be dealt with, and various magazines are transported by at least the transport rollers 9, 9, ... And guide wheels. The lower part guided by 16, 16, ... Has the same shape and the same size, and the lead frame housing part 18 for housing the lead frame of the magazine.
The width of a is made different according to the width of the lead frame to be stored. By doing so, the magazine transport mechanism 2 can cope with various lead frames without difficulty.

FIG. 6 shows a modified example of the conveying roller.
Only one main carrying roller 9 is attached to each rotary shaft 7,
The magazine 18 has a wide enough width to convey the magazine 18 even if only one rotary shaft is provided. Specifically, magazine 1
It has a width similar to the width of 8. By the way, in the embodiment of the magazine transport mechanism shown in FIGS. 2 to 5, each rotary shaft 7 is provided with two transport rollers 9 each, and each transport roller 9 is considerably larger than the width of the magazine 18. It has a narrow width.

As described above, various modifications of the carrying roller 9 can be considered. However, as shown in FIGS. 2 to 5, the carrying roller 9 having a narrow width is used.
Has the advantage of being easy to manufacture. This is because the wider the width of the transport roller 9 is, the more difficult it is to finish or attach the peripheral surface of the transport roller 9.

The surface of the conveying roller 9 is covered with an elastic resin such as urethane. Therefore, it is possible to prevent the conveyed magazine 18 from vibrating or receiving an impact, and there is no fear that the semiconductor element mounting lead frame in the magazine 18 will be defective due to the vibration or the impact. Needless to say, the transport roller 9 itself may be formed of an elastic resin instead of forming the transport roller 9 of metal and covering the surface portion with the elastic resin.

Further, the surface of the carrying roller 9 is made of a conductive resin,
For example, it may be covered with a carbon-based resin. By doing so, it is possible to avoid the problem that static electricity is generated due to friction between the magazine 18 and the conveying roller 9 and the magazine 18 is charged, resulting in electrostatic breakdown of the semiconductor element mounted on the lead frame. Of course, the transport roller 9 may be formed of a metal, and the transport roller 9 itself may be formed of a conductive resin instead of covering the surface of the transport roller 9 with a conductive resin, for example, a carbon-based resin.

As described above, according to the illustrated magazine transport mechanism 2, a plurality of transport rollers 9 whose rotary shaft 7 is substantially horizontal and oriented substantially orthogonal to the direction of the transport path are provided in the transport path. Since they are arranged along the conveying path, the magazine 18 is transferred by the conveying rollers 9, 9 ... Arranged along the conveying path, and there is no risk of dust generation due to contact between the belt and the guide. There is also no fear of being incapable of being transported due to the idle rotation of.

[0029]

According to the magazine carrying mechanism of the present invention, a plurality of carrying rollers are provided along the carrying path, the rotating shaft of which is substantially horizontal and whose direction is substantially orthogonal to the direction of the carrying path. To do. Therefore, according to the magazine transport mechanism of the first aspect, the magazine is transported by the transport rollers arranged along the transport path, and there is no risk of dust generation due to contact between the belt and the guide. There is also no fear that the belt will run idle and become untransportable.

According to a second aspect of the present invention, there is provided a magazine transporting mechanism in which a plurality of transport rollers are arranged in parallel on each rotary shaft. Therefore, according to the magazine transport mechanism of claim 2,
Since a plurality of transport rollers are arranged in parallel on one rotary shaft, the width of each transport roller can be small even if the width of the transported magazine is wide, and it is not necessary to use a wide transport roller which is difficult to manufacture.

According to a third aspect of the present invention, in the magazine transport mechanism, at least the surface of the transport roller is made of elastic resin. Therefore, according to the magazine transporting mechanism of claim 3, since at least the surface portion of the transporting roller is made of the elastic resin, it is possible to reduce vibrations and impacts which the transporting roller gives to the magazine during transporting, and in turn, the magazine. It is possible to reduce vibration and impact on the lead frame and the semiconductor element housed in.

According to a fourth aspect of the present invention, there is provided the magazine transport mechanism characterized in that at least a surface portion of the transport roller is made of a conductive material. Therefore, according to the magazine transport mechanism of claim 4, since at least the surface portion of the transport roller is made of conductive resin, the transport roller is charged by the contact between the transport roller and the magazine, and the semiconductor on the lead frame is passed through the magazine. It is possible to prevent static electricity from being transmitted to the element and causing electrostatic breakdown in the semiconductor element.

[Brief description of drawings]

FIG. 1 is a perspective view showing an entire wire bonding system including a plurality of wire bonding devices having an embodiment of a magazine transport mechanism of the present invention.

FIG. 2 is a perspective view showing one embodiment of a magazine transport mechanism of the present invention.

FIG. 3 is a perspective view illustrating transfer of a magazine between a magazine transport mechanism and a wire bonding unit side of a wire bonding apparatus.

FIG. 4 is a view of the magazine transport mechanism taken along arrow A in FIG.

5 is a view of the magazine mechanism taken along the arrow A in FIG. 3 when different magazines are conveyed.

FIG. 6 is a front view of a modified example of the transport roller of the magazine transport mechanism.

FIG. 7 is a perspective view showing an example of a wire-bonded lead frame.

[Explanation of symbols]

 1 Wire Bonding Device 2 Magazine Transport Mechanism 7 Rotating Shaft 9 Transport Roller 18 Magazine

Front Page Continuation (72) Inventor Hideaki Miyoshi, 3-chome, 3-chome, Sakaemachi, Hamura, Tokyo (72) Inventor Katsuro Yanagida 5-chome, 3-chome, 3-chome, Sakaemachi, Hamura, Tokyo

Claims (4)

[Claims] 1. A magazine transport mechanism for a wire bonding device for transporting a semiconductor device mounted lead frame storage magazine, wherein a plurality of transport rollers each having a rotation axis substantially horizontal and oriented substantially orthogonal to a direction of a transport path are provided. Magazine transport mechanism characterized by being arranged along the individual transport path 2. The magazine transport mechanism according to claim 1, wherein a plurality of transport rollers are arranged in parallel on each rotary shaft. 3. The magazine transport mechanism according to claim 1, wherein at least a surface portion of the transport roller is made of elastic resin. 4. The magazine transport mechanism according to claim 1, wherein at least a surface portion of the transport roller is made of a conductive material.