JPH056686Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention is mainly used in cleaning equipment for cleaning printed circuit boards, etc., in which various treatments such as ultrasonic treatment and steam treatment are applied to printed circuit boards as workpieces. The present invention relates to a workpiece conveyance device that sequentially transports the workpiece to a station for each process.

<Prior art> Conventionally, when cleaning printed circuit boards as described above, the workpieces are stored in a storage cage with a handle (so-called storage basket), and the storage cage is moved by the operator's hand to clean each workpiece one by one. They were transported to a station for each treatment.

Further, in the case of a large-sized cleaning device, automation is achieved by providing a dedicated trolley conveyor that automatically and continuously transfers the storage cages to each station without relying on the manual labor.

Prior art for such a printed circuit board cleaning device includes, for example, Japanese Patent Application Laid-Open No. 187979/1983, or Japanese Patent Application No.
There is one described in No. 61-192703.

<Problems to be solved by the invention> However, the above-mentioned manual workpiece conveyance has very poor workability, and in the workpiece conveyance device of a large cleaning device, a dedicated trolley conveyor is integrated with the cleaning device. As a result, the overall size of the device became large and the cost of the device also increased.

SUMMARY OF THE INVENTION In view of the problems in the conventional techniques described above, an object of the present invention is to provide a workpiece conveyance device that is small and inexpensive and has good workability in conveying a workpiece.

<Means for Solving the Problems> The present invention for solving the problems in the conventional techniques described above is a workpiece conveyance device that sequentially passes workpieces through a plurality of stations installed in parallel. An elevating body that is lifted and lowered via an elevating device, a hanger that suspends a work or a storage cage containing the work and that can be latched to the elevating body, and a hanger that is attached to the next station when the elevating body is raised. a guide rail that guides the hanger downward to the elevating body of the final station, a guide rail that guides the hanger downward to the elevating body of the station when the elevating body of the final station is raised; A hanger locking means is provided, which locks the hanger when the hanger slides down, and releases the lock when the elevating body rises, and allows the hanger to slide down by its own weight to the guide rail on the next station side. That is.

<Operation> According to the above means, as the elevating body of the station rises, the workpiece or the hanger suspending the storage cage containing the workpiece is guided down to the next station by the guide rail, and the workpiece is guided down to the next station. When the elevating body ascends, the hanger is first guided downward by the elevating body of the station, thereby giving the hanger circular movement through each station in sequence.

<Example> An example of the present invention will be described below with reference to the drawings. In FIG. 1 showing a schematic front view of a work transfer device for a printed circuit board cleaning device, and FIG. 2 showing a side view thereof, a cleaning tank main body 1 includes an ultrasonic tank 2, a steam tank 3, and a workbench 4. We are prepared. and,
The cleaning tank body 1 includes a first station 5 (corresponding to the first station in the present invention) having an ultrasonic tank 2, a second station 6 having a steam tank 3, and a second station 6 having a workbench 4. 3 stations (corresponding to the final station in the present invention) 7 are set.

A support frame 8 is installed on the rear upper surface of the cleaning tank body 1 for each of the stations 5 to 7. The support frame 8 includes a base plate 9 fixed on the cleaning tank main body 1.
It is made up of a total of four columns 10, front, rear, left and right, which are vertically installed on the base plate 9, and a top plate 11 attached to the columns 10.

A corner portion of a rectangular plate-shaped elevating body 12 is slidably fitted into the support column 10 of the support frame 8. The elevating body 12 is elevated and lowered while maintaining a horizontal state using the support column 10 as a guide.

A lifting device 14 for raising and lowering the lifting body 12 is provided in each of the support frames 8 (see FIG. 2). The lifting device 14 includes a drive motor 15 installed on the base plate 9, a drive sprocket 17 attached to an output shaft 16 of the drive motor 15,
A bracket 18 attached to the top plate 11, a driven sprocket 20 rotatably supported on the bracket 18 by a shaft 19, and the drive sprocket 17.
and an endless chain 21 suspended from a driven sprocket 20, and a portion of the chain 21 is connected to the elevating body 12. Therefore, when the chain 21 is rotated forward and backward by the drive motor 15, the elevating body 12 is raised and lowered.

The hanger 23, which is raised and lowered by the lifting body 12, is attached to a support shaft 24 as shown in FIG.
a rotating roller 25 with a flange rotatably supported on one end (rear end) of the support shaft 24; and a connecting rod 26 whose upper end is connected to the other end of the support shaft 24.
It consists of Connecting rod 26 of this hanger 23
A lattice box-shaped storage cage 27 is attached to the lower end of the housing. A printed circuit board 28, which is a workpiece, is stored in this storage cage 27.

On the front side of the support frame 8 of the first station 5 and the support frame 8 of the second station 6, a first guide rail 30 that slopes gradually lower toward the second station 6 is attached to an appropriate machine frame or bracket. It is being constructed through.

On the front side of the support frame 8 of the second station 6 and the support frame 8 of the third station 7, a second guide rail 31 that slopes gradually lower toward the third station 7 is attached to an appropriate machine frame or bracket. It will be constructed through the Note that in the second station 6, the second guide rail 3 is located above the terminal end (right end) of the first guide rail 30.
The starting end (left end) of No. 1 is located.

A third guide rail 32, which is gradually inclined downward and turned back toward the first station 5, is installed on the front side of the support frame 8 of the third station 7 and the support frame 8 of the first station 5 via an appropriate machine frame or bracket.
In the third station 7, the start end (right end) of the third guide rail 32 is located above the end end (right end) of the second guide rail 31. In the first station 5,
The starting end (left end) of the first guide rail 30 is positioned above the terminal end (left end) of the second guide rail 32 .

Each of the guide rails 30 to 32 is made of a strip plate material, and is a pair of two pieces that are vertically parallel.
The rotating roller 25 of the hanger 23 rolls and is guided downward between these guide rails 30 to 32. Note that both flanges 2 of the rotating roller 25
5a is guided along both side edges of the guide rails 30-32 (see FIG. 3).

At the front end of each elevating body 12 in the first station 5 and second station 6, a support member 33 is provided to protrude forward. As shown in FIG. 5, the front end of the support member 33 includes a roller receiver 34 for receiving and supporting the rotating roller 25 of the hanger 23, and a vertical retaining pin 35 located on the right side of the roller receiver 34. A hanging plate 36 is provided on the left side of the roller receiver 34 and extends downward.

The retaining pin 35 is inserted into the vertical hole 37 of the support member 33.
and the pin 35 is slidably inserted into the pin 35.
A spring 38 interposed between the vertical hole 37 and a closing plate 39 that closes the lower surface of the vertical hole 37 always urges the vertical hole 37 to protrude upward by a predetermined amount. This stop pin 35 stops the rotating roller 25 of the hanger 23 that rolls onto the roller receiver 34 from the left side thereof. Further, as the elevating body 12 rises to the top dead center, the hanging plate 36 closes the lower end of the guide rail 31 (or 32) on the left thereof, and the stop pin 35 As the body 12 rises to the top dead center, it comes into contact with the starting end of the guide rail 30 or 31 above it and is pushed down against the elasticity of the spring 38 (see the two-dot chain line in FIG. 5). Note that by pressing down the stop pin 35, the rotating roller 25 is rolled toward the guide rail 30 or 31 on the right side thereof.
Furthermore, the roller receiver 34, the retaining pin 35, and the parts attached thereto constitute a hanger retaining means in the present invention. Note that this hanger locking means is for the first and second stations, and is for the third station.
The station version will be described next.

Lifting body 12 at the third station 7
A support member 40 is provided at the front end of the support member 40 to protrude forward. At the front end of the support member 40, as shown in FIG.
A hanging arm 42 of a substantially U-shaped roller receiving member 41 for receiving and supporting the roller receiving member 5 is rotatably provided via a pin 43. The roller receiving member 41 is always biased to the right by a spring 44 provided at the rear thereof, and its opening is kept slightly upward. Further, a stopper 45 is provided on the top plate 11 of the support frame 8 above the roller receiving member 41. The rotating roller 25 of the hanger 23 rolling from the second guide rail 31 is received on the roller receiving member 41. Further, as the elevating body 12 rises to the top dead center, the roller receiving member 41 comes into contact with the stopper 45 and rotates counterclockwise around the pin 43 against the elasticity of the spring 44. 4), the rotation of the receiving member 41 causes the rotating roller 25 to roll toward the third guide rail 32. Moreover, by the roller receiving member 41 and the parts attached thereto,
A hanger locking means according to the present invention is configured for the third station.

A gate member 47 made of rod material is provided at the front left end of the top plate 11 of the support frame 8 in the first station 5 so as to be slidable in the vertical direction (see FIGS. 6 and 7). The upper end portion of the gate member 47 is bent in a folded manner, and the gate portion 48 at the tip thereof is inserted into the insertion hole 50 of the third guide rail 32 through an appropriate guide member 49. When the stopper 51 of the gate member 47 is received by the top plate 11, the gate portion 48 is interposed between the third guide rails 32. Further, the gate member 47 is connected to the elevating object 12 as the elevating object 12 rises to the top dead center.
comes into contact with the lower end of the member 47 and is pushed up, whereby the gate portion 48 is pulled out upward from between the third guide rails 32 (see the two-dot chain lines in FIGS. 6 and 7). .

Next, the operation of the above-mentioned workpiece conveyance device will be explained.

First, before operation, the hanger 23
As shown in the figure, each of the stations 5 to 7 is in a suspended state supported by the elevating body 12 in its original position.

In this state, thirdly, the printed circuit board 28 is stored in the storage cage 27 of the hanger 23 placed on the station 7, and then the operation is started. Note that the hanger 2 placed on the first station 5
The unprocessed printed circuit board 28 is stored in the storage cage 27 of No. 3, and the unprocessed printed circuit board 28 is stored in the storage cage 27 of the hanger 23 placed on the second station 6. It is assumed that the printed circuit board 28 is stored.

With the start of the operation, the storage cages 27 are put into the ultrasonic bath 2 or the steam bath 3 by the lifting devices 14 of the first station 5 and the second station 6, and each storage cage 2
The printed circuit board 28 in 7 is cleaned (first
(See the two-dot chain lines a and b in the figure).

Further, the elevating body 12 is raised to the top dead center by the elevating device 14 of the third station 7.
The position of the storage cage 27 at this time is shown in FIG. 1 by a two-dot chain line c. 4, the roller receiving member 41 is rotated against the elasticity of the spring 44, and the rotating roller 25 of the hanger 23 is moved along the third guide rail 32. The roller 25 then rolls (flows down) and is temporarily stopped at the gate portion 48 of the gate member 47. The position of the storage cage 27 at this time is indicated by a two-dot chain line d in FIG.

After that, the elevating device 14 of the third station 7
As a result, the elevating body 12 is lowered to its original position. Further, as the elevating body 12 descends, the roller receiving member 41 is returned to its original state by the elasticity of the spring 44.

Next, the storage cage 27 is raised by a predetermined amount and stopped by the lifting device 14 of the second station 6, and the printed circuit board 28 inside the cage 27 is dried. The storage cage 27 at this time
The position of is shown in FIG. 1 by a two-dot chain line e.

Next, the elevating body 12 is raised to the top dead center by the elevating devices 14 of the first station 5 and the second station 6, respectively. The position of the storage cage 27 at this time is shown in FIG. 1 by two-dot chain lines f and g. Then, the stop pin 35 of the first station 5 opens, and the rotary roller 25 of the hanger 23 rolls (flows down) along the first guide rail 30, and the roller 25 moves down the second station.
At the same time, the stop pin 3 of the second station 6 is fixed at the hanging plate 36 of the second station 6.
5 is opened, and the rotating roller 25 of the hanger 23 is rotated.
rolls (flows down) along the second guide rail 31
Then, the roller 25 is received by the roller receiving member 41 of the third station 7. moreover,
When the gate member 47 of the first station 5 is pushed up and the gate portion 48 is opened, the rotary roller 25 that was stopped at the gate portion 48 rolls along the third guide rail 32 ( The roller 25 is stopped by the hanging plate 36 of the first station 5.

Then, the elevating bodies 12 are lowered to their original positions by the elevating devices 14 of the first station 5 and the second station 6, respectively. Upon completion of the descent to the original position, the hanging plate 36 is lowered and the ends of the first guide rail 30 and the second guide rail 31 are opened, so that
The rotary roller 25, which was stopped by the hanging plate 36, rolls onto the roller receiver 34 of each elevating body 12 and is received. Further, as the elevating body 12 descends, the retaining pin 35 is returned to its original state by the elasticity of the spring 38, and the gate member 47
returns to its original state due to its own weight.

One cycle of operation is performed as described above. And at the third station 7,
The printed circuit board 28 after the cleaning process is replaced with the printed circuit board 28 to be processed next time in the storage cage 27 .

By repeating the cycle, the hanger 23
By sequentially passing through each of the stations 5 to 7, the printed circuit boards 28 are continuously processed.

The drive motor 15 of each elevating device 14 is controlled by a control circuit (not shown), and the control is set in consideration of the processing time, elevating movement amount, etc. of each station 5 to 7.

Furthermore, the device components of the second station 6, including the support frame 8, the elevating body 12, the elevating device 14, the first guide rail 30 or the second guide rail 31, etc., are considered as one unit component, and the second station By providing before and after 6,
It is possible to easily add more stations.

In addition, this workpiece conveyance device also has a printed circuit board 2.
It can be used not only for transporting 8, but also for transporting other electronic parts, mechanical parts, etc.

In addition, in the embodiment, the hanger 23 is provided with the storage cage 27 for storing the workpiece, but the hanger 23
It is also conceivable to directly hang the workpiece on 3.

<Effects of the invention> That is, according to the invention, as the elevating body of the station rises, the workpiece or the hanger suspending the storage cage containing the workpiece is guided downward to the next station by the guide rail.
When the elevating body of the final station rises, the hanger is first guided downward by the elevating body of the station, giving the hanger circular movement through each station in turn, which is compared to conventional manual workpiece transportation. , good workability is obtained, and since the hanger is moved from one station to the next station using the downward guidance of the guide rail, it is possible to use a trolley conveyor, etc. for moving the hanger. It is possible to eliminate a moving device, and therefore, compared to a workpiece conveyance device of a large-sized cleaning device, the structure is simplified, and a smaller and cheaper device can be obtained.

In addition, each station is provided with an independent lifting device, and the lifting body that locks the hanger can be independently controlled to lift and lower, so the lifting and lowering operation of the hanger at each station and the movement of the hanger between stations can be controlled independently. This allows multiple workpieces to be handled in an assembly-line manner, and the number of stations can be easily increased or reduced.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a partially cutaway schematic front view of the workpiece cleaning device, Fig. 2 is a partially cutaway side view thereof, and Fig. 3 is a side view of the hanger. , FIG. 4 is an enlarged front view showing the main parts of the third station, FIG. 5 is an enlarged front view showing the main parts of the second station, and FIG. 6 is an enlarged front view showing the main parts of the first station. FIG. 7 is a side view thereof. 5-7...Station, 12...Elevating object, 1
4... Lifting device, 23... Hanger, 27... Storage cage, 28... Printed circuit board (work), 3
0...first guide rail, 31...second guide rail, 32...third guide rail.

Claims (1)

[Scope of utility model claims] A workpiece conveyance device that sequentially passes workpieces through a plurality of stations arranged in parallel, and includes an elevating body that is raised and lowered via an elevating device for each station, and a workpiece or a storage cage containing the workpieces that is suspended and a hanger that can be latched to the body; a guide rail that guides the hanger downward to the elevating object of the next station when the elevating object is raised;
When the elevating body of the final station rises, a guide rail that first guides the hanger downward to the elevating body of the station and a hanger that is provided on the elevating body and slides down due to its own weight along the guide rail on the front station side are locked. 1. A workpiece conveying device comprising: a hanger locking means that releases the lock when the elevating body is raised, and causes the hanger to slide down by its own weight onto a guide rail on the next station side.