JP2547093B2 - Sheet material conveying device - Google Patents

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyance device for a long strip-shaped sheet material,
For example, the present invention relates to a hoop material having a lengthened lead frame, which is used for a transportation device for the hoop material in a manufacturing line of electronic parts configured to perform a series of process treatments.

[Prior art]

For example, in the case of a relatively small electronic component such as a transistor, in order to improve production efficiency, it is necessary to replace the conventional lead frame with a hoop material that has an elongated form. Has been increasing recently. In the case of the above transistor, it is manufactured through processes such as die bonding, wire bonding, resin mount, dam bar cut, register coat, marking, soldering to leads, etc., but these processing steps are sent in series. This is done for the material. Then, at the stage where the final process is completed, the completed unit electronic components are discharged in a state of being connected to the hoop material in series. By the way, for example, a drying process for drying the printing is performed after the marking process, and a cleaning process and a drying process subsequent to the cleaning process are performed after the solder plating process. The cleaning process is performed by passing the hoop material through a cleaning tank, and the drying process is performed by passing the hoop material through a drying furnace. In this case, when transporting the hoop material in the cleaning tank or the drying furnace, as shown in FIG. 4, the hoop material W is often configured to be largely detoured downward and transported. This is because it is possible to increase the length of the hoop material that passes through the device and increase the processing efficiency without increasing the size of the cleaning tank or the drying oven. This is because it needs to be soaked.

[Problems to be Solved by the Invention]

However, in carrying the hoop material as described above, not only the carrying roller a for feeding the hoop material W but also the hoop material W as shown in FIG. 4 and FIG. Since the guide chute b for guiding to the above must be provided, the following problems have hitherto been encountered. That is, the contact friction between the hoop material and the guide chute may not allow the hoop material to be smoothly conveyed, and thus the hoop material W may be buckled.
Further, since it becomes difficult for the treatment to reach the portion covered with the guide chute, defective products are likely to occur. Further, there is a problem that the cost of the transport device increases because the guide chute is required. The present invention has been devised under the circumstances as described above, and, for example, in the transportation of the hoop material as described above, a large roundabout detour is performed in the device without the above-mentioned conventional problems. It is an object of the present invention to provide a carrying device configured to carry a hoop material while taking a carrying path.

[Means for solving the problem]

In order to solve the above problems, the present invention takes the following technical means. That is, the apparatus of the present invention is a transporting apparatus for transporting a long strip-shaped sheet material in at least two or more step processing apparatuses following a series, and is the earliest step apparatus of the two or more step processing apparatuses. Of the sheet material carrying-in side, which is arranged at the sheet material carrying-in side, and which is attached to the support shaft via the clutch. The carry-out rotation roller attached to the support shaft, is arranged at at least one place between the carry-in rotation roller and the carry-out rotation roller so as to be aligned with these, and is attached to the support shaft via a clutch. An intermediate feed rotation roller for feeding the sheet material from the processing equipment to the post-processing equipment, and a transmission force for transmitting the rotational force of the motor to each of the support shafts to rotate the support shafts in the same direction. After the sheet material is set on the moving mechanism, the carry-in rotary roller, the intermediate feed rotary roller, and the carry-out rotary roller while their rotations are stopped, the rollers are set so that the sheet material falls between the rollers. First control for controlling the rotation to form the buffer portion of the sheet material in each process device, and when the amount of slack in the buffer portion of the sheet material formed in each process device reaches a predetermined amount, all The second control for rotating the roller is provided with a control means for controlling connection / disconnection of each of the clutches.

[Action]

The sheet material loading side position of the earliest process device of the series of process processing devices has a loading rotation roller, the sheet material loading side position of the final process device has a loading rotation roller, and a loading rotation roller. An intermediate feed rotation roller for delivering the sheet material from the preceding process device to the subsequent process device is provided between the carry-out rotation roller and the predetermined conveyance path position. The long strip-shaped sheet material is set on the carry-in rotary roller, the intermediate feed rotary roller, and the carry-out rotary roller in a line in a stopped state. After that, the buffer section is formed on the sheet material in each process apparatus by the first control of the control means. This will be described by taking the process apparatus using two lines as an example. For example, the buffer section can be formed as follows. That is, with the intermediate feed rotation roller and the carry-out rotation roller stopped, first, only the carry-in rotation roller is rotated. At this time, the sheet material is fed by the carry-in rotary roller in a state where the leading end of the sheet material is retained on the intermediate-feed rotary roller and the carry-out rotary roller. Therefore, the sheet material is
The intermediate feed rotary roller and the carry-in rotary roller sag and fall to form a buffer section in the preceding process apparatus. When the buffer portion has a predetermined size, the intermediate feed rotation roller is rotated synchronously with the carry-in rotation roller while the carry-out rotation roller is stopped. As a result, the sheet material is fed from the intermediate feed roller and the carry-in rotary roller while the leading end of the sheet material is retained on the carry-out rotary roller. Therefore, the sheet material sags between the carry-out rotation roller and the intermediate feed rotation roller to form the buffer section in the post-process apparatus as described above. At this time, since the carry-in rotation roller is still rotating, the buffer portion formed between the carry-in rotation roller and the intermediate feed roller is kept as it is. Then, when the size of the buffer portion of the sheet material formed in the preceding process device and the subsequent process device reaches a predetermined amount, all the rollers are rotated by the second control of the control means. As a result, the sheet material forms a buffer portion of a predetermined size in each process device and maintains the size of the buffer part in a constant manner, and the inside of the preceding process device and the subsequent process device is further changed from the subsequent process device to the next process device. Is transported to the process equipment.

【effect】

As described above, in the transporting apparatus of the present invention, the long strip-shaped sheet material can be transported in the process apparatus in a state where the buffer material, that is, the slack drop section is formed on the sheet material, so that it passes through the apparatus. In order to increase the processing efficiency by increasing the length of the sheet material to be used, it is not necessary to upsize the device. This contributes to downsizing of the line. Moreover, when the sheet material is conveyed in such a state that the detour path that descends downward is taken, it is not necessary to provide a guide chute for guiding the sheet material to a predetermined conveyance path. Therefore, for example,
When used to convey hoop material in the production line of electronic parts, the conventional problem is that the hoop material cannot be conveyed smoothly due to contact friction with the guide chute. Problems such as increased production cost of the device can be solved at once. Further, since the size of the slack amount of the buffer section can be arbitrarily set, the sheet material conveying path in the device can be appropriately changed according to the size of the device in the vertical direction. Further, each rotating roller is attached via a clutch to each support shaft that rotates in the same direction by a motor via a transmission mechanism at the same time, and the rotation control of each roller in each of the above-mentioned controls disengages each clutch. -It can be performed by extremely simple control of contact, and it is possible to effectively avoid complication of the device.

[Explanation of the embodiment]

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. In this example, an example in which the present invention is applied to a carrying device for carrying a hoop material in a cleaning process and a drying process performed after a solder attaching step in a manufacturing line for electronic components such as transistors is shown. . As shown in FIG. 1 and FIG. 2, the present transporting apparatus includes a hoop material loading rotary roller 2 provided at a hoop material loading side position of a cleaning tank 1 which is a preceding step apparatus, and a drying furnace 3 which is a post-step apparatus. Hoop material unloading rotation roller 4 provided at the hoop material unloading side position, and the hoop material unloading rotation roller 2 and the hoop material unloading rotation roller at the hoop material unloading side position of the cleaning tank 1 and the hoop material unloading side position of the drying furnace 3. 4 and an intermediate feed rotation roller 5 arranged so as to be aligned with each other. Each of the rollers 2, 4, 5 is attached to a support shaft 6, 7, 8 supported by a bracket (not shown), and a pulley attached to the support shaft is attached to each of these support shafts 6, 7, 8. The rotation of the electric motor 9 is transmitted via a transmission belt mechanism including a belt and a belt wound around the transmission belt mechanism. That is, between the support shaft 6 of the hoop material carry-in rotation roller 2 and the support shaft 7 of the intermediate feed rotation roller 5, and between the support shaft 7 of the intermediate feed rotation roller 5 and the support shaft 8 of the hoop material carry-out rotation roller 4. Belt transmission mechanisms 10 and 11 are respectively interposed between them. In addition, the support shaft 6 of the hoop material loading rotary roller 2 is
It is connected to the electric motor 9 via a belt transmission mechanism 12. Therefore, the rotation of the electric motor 9 is transmitted to the support shaft 6 via the belt transmission mechanism 12, from the support shaft 6 to the support shaft 7 via the belt transmission mechanism 10, and from the support shaft 7 to the belt transmission mechanism 11. Each is transmitted to the support shaft 8. A speed reducer 13 is provided between the electric motor 9 and the belt transmission mechanism 12. In addition, the clutches 14, 15, 16 are provided at the intermediate portions of the respective support shafts 6, 7, 8.
Are provided respectively. And this clutch 14,15,16
In the state where all are connected, the above-mentioned rollers 2, 4, 5 are synchronously rotated. On the other hand, by selecting the clutch to be connected, each of the rollers 2, 4 and 5 can be independently rotated. In this example, in order to improve the stability of feeding the hoop material W, as described above, the intermediate feed rotation roller 4 is
It is provided at two locations in the hoop material feeding direction. Then, the support shafts of the respective rollers are linked via a belt transmission mechanism 17. Similarly, the hoop material carry-out rotation roller 5 is also provided at two locations in the hoop material feed direction,
Each shaft is connected via a belt transmission mechanism 18. Further, in the case of this example, in order to be able to correspond to the transportation of the hoop material in the production line of the dual-line type electronic component, each roller 2, 4 is provided with a predetermined interval of two on each of their supporting shafts. It is installed open. A dual-line type electronic component is manufactured using a hoop material W having a pair of side hoops W ₁ and W ₂ which are parallel to each other with a predetermined interval as shown in FIG. Therefore, in order to stably and smoothly convey the hoop material W, it is necessary to provide rollers that respectively support the side hoops W ₁ and W ₂ and feed the side hoops W ₁ and W _2. , Each of the rollers 2, 4 is arranged in the axial direction. A carrier pin 19 is provided on the outer circumference of each of the rollers 2, 4 and 5 to feed into the hoop material W by fitting into feed holes (not shown) provided in the hoop material W at regular intervals. Has been. Further, in the present transporting device, the rotation of the rollers 2, 4, 5 is controlled so that the hoop material W falls between the rollers, and the buffer portion B is added to the hoop material W in the cleaning tank 1 and the drying furnace 3. First control for forming and buffer portion B of hoop material W formed in the cleaning tank 1 and the drying furnace 3
Is provided with a second control for rotating all the furnaces 2, 4 and 5 when the size of the furnace reaches a predetermined amount. In the case of this example, this is configured by a microcomputer. Further, as shown in FIG. 3, the control means 20 is provided with a clutch control means 21 for performing the above-mentioned first control and second control, which is substantially realized by a program. Next, the operation of the present transporting device having the above configuration will be described with reference to each of FIG. The clutch control means 21 uses the hoop material W for each roller 2,
When it is not set on 4,5, all of the clutches 14, 15, 16 are disconnected. As shown in FIG. 1A, when the hoop material W is set on the hoop material carry-out rotation roller 5, the intermediate feed rotation roller 4, and the hoop material carry-in rotation roller 2, the hoop material carry-in rotation roller 2 is supported. Axis 6
Only clutch 14 of is connected. As a result, since only the hoop material carry-in rotation roller 2 is rotated, the hoop material W
Will be fed by the hoop material carry-in rotary roller 2 in a state where the tip end portion thereof is stopped on the hoop material carry-out rotary roller 5 and the intermediate feed rotary roller 4. Therefore, as shown in FIG. 1 (b), the hoop material W sags between the intermediate feed rotation roller 4 and the hoop material carry-in rotation roller 2, and the buffer portion B is added to the hoop material W in the cleaning tank 1. It is formed. The hoop material W is set on the roller in the cleaning tank 1.
And the upper lid of the drying furnace 3 is opened, and the hoop material W is put into the apparatus from this portion. In this case, the operator may set the hoop material, or a hoop material transfer device may be separately provided to automate the setting of the hoop material W. Also, the hoop material W
It may be detected that the sensor is set on the roller by using a sensor or by an operator turning on a predetermined switch. When the buffer portion B of the hoop material W formed in the cleaning tank 1 reaches a predetermined size, the clutch control means 21
Connects the clutch 15 of the support shaft 7 of the intermediate feed rotation roller 4 to rotate the intermediate feed rotation roller 4 synchronously with the hoop material loading rotation roller 2. Therefore, the hoop material W
Receives the feed of the intermediate feed rotation roller 4 in a state in which the tip is stopped on the hoop material delivery rotation roller 5, so as shown in FIG. 1 (c), the hoop material delivery rotation roller 5 and the intermediate feed rotation roller 5 are rotated. It slackens between the roller 4 and the buffer section B is formed in the drying furnace 3. In this case, it goes without saying that the size of the buffer section B in the cleaning tank 1 is maintained constant because the hoop material loading rotary roller 2 is also rotating like the intermediate feed rotary roller 4. Then, the hoop material W formed in the drying furnace 3
When the buffer portion B becomes a predetermined size, the remaining clutch 16 is also connected, and the hoop material carry-out rotation roller 5 is rotated in synchronization with the hoop material carry-in rotation roller 2 and the intermediate feed rotation roller 4. As a result, the hoop material W is
While maintaining the sizes of the buffer sections B in the cleaning tank 1 and the drying furnace 3 constant, the cleaning tank 1 and the drying furnace 3 are further transported from the drying furnace 3 to the next process apparatus. Further, in this case, the hoop material W is transported while being immersed in the cleaning liquid in the cleaning tank 1. The size of the buffer portion B of the hoop material W is detected by
For example, it is performed by using a sensor or by detecting the time from the time when the roller starts to rotate. Further, when the hoop material is interrupted, the apparatus is temporarily stopped, and a new hoop material is connected to the hoop material up to that point by spot welding, so that the hoop material is continuously conveyed. As described above, in the carrying apparatus of this example, the hoop material W is carried while forming the buffer portion B in the cleaning tank 1 and the drying furnace 3, so that the length of the hoop material to be passed through the apparatus is increased. In order to improve the processing efficiency, it is not necessary to upsize the cleaning tank 1 and the drying furnace 3, and the line can be shortened. Moreover, in the case of the present transporting apparatus, when transporting the hoop material as described above, it is not necessary to provide a guide chute for guiding the hoop material W to a predetermined transport path. There is no problem that the hoop material cannot be smoothly transported due to the contact friction with the guide chute unlike the transport device, or the cost of the device is high because the guide chute is required. Also,
Since the size of the slack amount of the buffer portion B can be arbitrarily set, there is also an advantage that the conveyance path of the hoop material W in the device can be easily changed according to the vertical size of the device and the like. By the way, it goes without saying that the scope of the present invention is not limited to the above-described embodiments. For example, the number of each of the carry-in rotary roller, the intermediate feed rotary roller, and the carry-out rotary roller is not particularly limited, and each roller may be one or three or more may be provided. Alternatively, the carry-in rotary roller, the intermediate feed rotary roller, and the carry-out rotary roller may be rotationally driven by different drive sources. Further, in the above embodiment, in forming the buffer portion on the hoop material, the buffer portion was first formed in the previous process apparatus, and then the buffer portion was formed in the subsequent process apparatus. It is also possible to first form the buffer section in the apparatus and then form the buffer section in the previous process apparatus. Furthermore, the present invention can be applied to a conveying device for conveying a sheet material in three or more processing apparatus, and in this case, at least two or more intermediate feed rotary rollers provided between the processing apparatuses are required. become. Further, in the above embodiment, an example in which the present invention is applied to a hoop material conveying device in a manufacturing line of electronic components has been shown, but in addition to this, the present invention is applied to various long strip-shaped sheet material conveying devices. It is possible. For example, the present invention can be applied to an apparatus for transporting a film in a development process of a motion picture film including a series of steps such as a step of immersing the film in a developing solution and a drying step.

[Brief description of drawings]

FIG. 1 is a diagram for explaining the operation of the carrier device according to the embodiment of the present invention, FIG. 2 is a plan view of the carrier device according to the embodiment, and FIG.
FIG. 4 is a system block diagram of the embodiment, FIG. 4 is a view showing a conventional example, and FIG. 5 is a view corresponding to a cross section taken along line VV of FIG. 2 ... Rotary-in for loading (Rotary-in for loading hoop material), 4
...... Outgoing rotation roller (hoop material unloading rotation roller), 5…
… Intermediate feed rotary roller, 20… Control means.

Claims (1)

(57) [Claims] 1. A transport device for transporting a long strip-shaped sheet material in at least two or more process processing devices following a series, wherein the sheet material is the first process device of the two or more process processing devices. A carry-in rotation roller arranged at the carry-in side position and attached to the support shaft via a clutch, and a support shaft arranged via the clutch at the sheet material carry-out side position of the final process device of the above-mentioned two or more process processing devices. The carrying-out rotation roller attached to the above-mentioned carrying-out rotation roller, the above-mentioned carrying-in rotation roller and the carrying-out rotation roller are arranged at at least one position so as to be aligned with these, and are attached to the support shaft via a clutch. An intermediate feed rotation roller for delivering the sheet material to the post-process device, a transmission mechanism for transmitting the rotational force of the motor to each of the support shafts and rotating the support shafts in the same direction, and After the sheet material is set on the carry-in rotary roller, the intermediate feed rotary roller, and the carry-out rotary roller with their rotations stopped, the rotation of the rollers is controlled so that the sheet material falls between the rollers. First control for forming the buffer portion of the sheet material in each process apparatus and rotating all rollers when the amount of slack in the buffer portion of the sheet material formed in each process apparatus reaches a predetermined amount 2. A sheet material conveying device, comprising: a control unit that performs the second control by controlling the connection / disconnection of each of the clutches.