JPH05136598A - Printed board transfer device - Google Patents

Abstract

PURPOSE:To provide a printed board transfer device which transfers a printed board by a chain at a regular speed by clamping it even if impact or the like acts on the printed board. CONSTITUTION:A first chain 12 and a second chain both of endless type are provided in parallel, and the first chain 12 possesses a clamping means 4. The clamping means 4 is equipped with a clamp block 41 inserted into a long link pin 126 in a vertically movable manner and a coil spring 45. Taking advantage of the clamp plane 41b of the block 41 energized downward by the spring 45, the end of a board W is clamped. When a roller 43 of the block 41 is made to move along a cam, the block 41 is made to ascend to release the board W from the clamp plane 41b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board carrying device.

[0002]

2. Description of the Related Art In a printed circuit board processing step, for example, a cleaning processing step for cleaning a printed circuit board, a printed circuit board transfer device for automatically transferring a printed circuit board to be cleaned is used. As the printed circuit board transporting device, conventionally, a system for transporting a printed circuit board by a mesh belt and a system for transporting a printed circuit board by an attachment jig attached to a chain are known.

[0003]

However, in the conventional printed circuit board transporting device of this type, there is a problem that the printed circuit board moves or slides on the mesh belt or the attachment jig due to an impact or the like, and the uniformity of the transfer speed cannot be maintained. May occur. For example, in the cleaning process described above, in order to remove the flux and the like remaining on the printed circuit board, the printed circuit board is washed with shower water and drained by air blow. In this case, shower water or air blow should hit the printed circuit board. The impact causes the printed circuit board to move or slide on the mesh belt or attachment jig.
In this case, the conveyance speed of the printed circuit board becomes non-uniform, and the cleaning quality and draining quality of the printed circuit board are likely to be non-uniform.

The present invention has been made in view of the above situation, and even when a shock or the like acts on the printed circuit board by forcibly clamping the printed circuit board,
An object of the present invention is to provide a printed circuit board transportation device which is advantageous in avoiding unevenness in the transportation speed of the printed circuit board.

[0005]

A printed circuit board carrying device according to the present invention is provided with a first holding member arranged at a predetermined interval and a first holding member erected endlessly and circulatingly between the first holding members. A first transport section having a first endless section and a first engaging section provided in the first endless section and engaging with a part of the printed circuit board for transporting the printed circuit board; A second holding member, a second endless member that is endlessly installed between the second holding members in a state of facing the first endless member, and is capable of circulating operation in the same direction at a speed corresponding to the first endless member; A second transport section having a second engaging section provided in the endless section and engaging with another part of the printed circuit board for transporting the printed circuit board; and a first endless section of the first transport section and Of the second endless section of the second transport section One even without is characterized in that it comprises a clamping means for fixing and clamping the printed circuit board that is conveyed in engagement with the first engagement portion and second engagement portion.

The first endless portion and the second endless portion can have a chain structure or a belt structure. At least one of the first endless portion and the second endless portion has a clamp means for sandwiching and fixing the printed circuit board to be conveyed. The clamp means may be of a type that clamps the end portion of the printed board in the thickness direction. As the clamping means, a structure of clamping with a block, a structure of clamping with a shaft end surface of a rod, or the like can be adopted. It is also preferable to provide a clamp releasing means for automatically releasing the clamped state of the clamp means. As the clamp releasing means, a cam mechanism can be adopted as shown in the embodiments described later.

[0007]

When the printed circuit board is transported, the first engaging portion of the first transport section engages with a part of the printed circuit board and
The second engaging portion of the second transporting portion engages with another part of the printed circuit board. At this time, since the first endless portion and the second endless portion circulate in a predetermined direction, the printed circuit board is
It is conveyed in the operating direction of the endless section and the second endless section. When the printed circuit board is conveyed in this manner, the clamp means clamps the printed circuit board.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a printed circuit board carrying device according to the present invention will be described below with reference to the drawings. (Constitution) As shown in FIG.
And a second transport unit 2 facing the first transport unit 1. The first transport unit 1 includes sprockets 10 and 11 as first holding bodies arranged at a predetermined interval, an endless first chain 12, and a first drive motor 13 that rotates the sprocket 11 via a chain 13c. It consists of and. The first chain 12 is a sprocket 10,
It is erected endlessly between 11 and when the sprocket 11 is rotationally driven, the first chain 12 circulates in the direction of arrow X1. Therefore, the first chain 12 functions as a first endless portion.

The first chain 12 is shown in FIGS. 4 and 5. As shown in FIGS. 4 and 5, the first chain 12 includes a link pin 120, a link plate 121 pivotally supported by each link pin 120, and a sleeve 122 into which the link pin 120 is inserted. The sleeve jig 123 has the link pin 120 inserted therethrough. The first ring groove 1 as the first engaging portion is provided on the peripheral wall of each sleeve jig 123.
5 is formed. The first ring groove 15 has a mounting surface 15a on which the printed circuit board W can be mounted. Note that FIG.
In, the groove width of the first ring groove 15 is indicated by L1.

Next, the second transport section 2 will be described. Figure 1
As shown in FIG. 2, the second transport unit 2 includes the sprocket 20, 21 as a second holding body, which is arranged at a predetermined interval, and the second transport unit 2.
It is composed of a chain 22 and a second drive motor 23 that rotates the sprocket 21 via a chain 23c. The second chain 22 is erected endlessly between the sprockets 20 and 21, and when the sprocket 21 is rotationally driven, the second chain 22 circulates in the same direction as the first chain 12 at the same speed. Therefore, the second chain 22 functions as a second endless portion.

As shown in FIG. 5, the second chain 22 has basically the same structure as the first chain 12. That is, the second chain 22 includes the link pin 220 and the link pin 2
A link plate 221 pivotably supported by 20;
The sleeve 222 has the link pin 220 inserted therethrough, and the sleeve jig 223 has the link pin 220 inserted therein. A second ring groove 25 as a second engaging portion is formed on the peripheral wall of each sleeve jig 223. The second ring groove 25 has a mounting surface 25a on which the printed circuit board W can be mounted.

Now, the configuration of the main part of this embodiment will be described. That is, as shown in FIG. 3, the first chain 12 of the first conveyor 1 is equipped with an appropriate number of clamp means 4 at equal intervals. The clamp means 4 will be described with reference to FIG.
As shown in FIG. 7, the clamp means 4 includes a first chain 12
In the normal link pin 120 which is equipped at a predetermined interval in
Longer link pin 126 and longer link pin 126
Insertion hole 40 that is vertically inserted into the protruding portion 126a of the
Clamp block 41 having a
A roller 43 rotatably held by a shaft 42, a fixing plate 44 provided at an end of the long link pin 126,
Seating surface 41a of the fixing plate 44 and the clamp block 41
And a coil spring 45 which is interposed between and. Here, a resin bearing 46 is provided in the insertion hole 40 of the clamp block 41. The bearing 46 facilitates the lifting and lowering of the clamp block 41 and prevents the clamp block 41 from tilting during the lifting and lowering. The coil spring 45 is inserted through the long link pin 126 and constantly urges the clamp block 41 downward, that is, in the direction of the arrow Y1. As can be understood from FIGS. 6 and 10, the clamp block 41 has a stepped clamp surface 41b. The second chain 22 is not provided with a clamp means.

Further, as shown in FIG. 1, a cam 6 is fixed to a starting end portion P1 of the first conveying portion 1 and a trailing end portion P of the first conveying portion 1 is provided.
A cam 7 of the same type as the cam 6 is fixed to the cam 2. Here, FIG. 8 and FIG. 9 show the vicinity of the starting end portion P1 of the first transport unit 1. As shown in FIGS. 8 and 9, the cam 6 is fixed to the main rail 50 via a bolt 60. The cam 6 has a tapered surface 61 that is inclined upward toward the end side, a horizontal surface 62 that is continuous with the tapered surface 61, and guide surfaces 63 that face each other.

Further, as shown in FIG. 1, a reversing jig 8 for reversing the second chain 22 is fixed to the starting end portion P1 of the second conveying portion 2 and is attached to the end portion P2 of the second conveying portion 2. The inversion jig 9 is fixed. The reversing jig 9 is of the same type as the reversing jig 8 and is for reversing the second chain 22. FIG. 2 shows the vicinity of the reversing jig 8. As shown in FIG. 2, the reversing jig 8 is fixed to the main rail 50 via bolts 80, and has guide surfaces 81 facing each other.

Further, in this embodiment, as shown in FIG. 10, a rail cover 51 is fixed to the side wall surfaces of the main rails 50 of the first transport section 1 and the second transport section 2 with bolts. A chain passage 53 is formed with the main rail 50. As can be understood from FIG. 10, the first chain 12 and the second chain 22 run in the chain passage 53. In this case, the regulation surface 50a of the main rail 50 and the rail cover 5
The first restricting surface 51a is the sleeve 122 of the first chain 12.
Is close to the outer peripheral surface of the sleeve 222 of the second chain 22. Therefore, the rolling of the first chain 12, the second chain 22, and the clamp block 41 can be restricted. Further, as shown in FIG. 4, a cleaning nozzle 55 for spraying a cleaning liquid to the printed circuit board W in the middle of transportation to remove the flux and the like, and an air blow nozzle 56 for blowing away the cleaning liquid adhering to the printed circuit board W are arranged near the apparatus. It is set up.

(Operation) Next, the operation of the apparatus of this embodiment will be described together with the method of using it. As can be understood from FIG. 1, as the first drive motor 13 and the second drive motor 23 are driven, the first chain 12 and the second chain 22 circulate at the same speed in the arrow X1 direction. At this time, as shown in FIG. 9, the roller 4 of the clamp block 41 of the clamp means 4 is
When 3 climbs the taper surface 61 of the cam 6 at the starting end portion P1, the clamp block 41 rises while elastically contracting the coil spring 45. Therefore, the roller 43 is placed on the horizontal surface 62 of the cam 6.
Climbing up to the clamp block 4 of the clamping means 4
1 is open. The coil spring 45 elastically contracted at this time
The urging force is accumulated in. Similarly, when the roller 43 climbs the tapered surface 71 of the cam 7 at the terminal end P2, the clamp block 41 opens while elastically contracting the coil spring 45.

By the way, in a state where the clamp block 41 is opened at the starting end P1, the printed circuit board W is inserted from the starting end P1. Then, the clamp block 41 opened and the mounting surface 15 of the sleeve jigs 123 and 223.
The printed circuit board W is inserted between a and 16a. As a result, a part of the printed circuit board W in the width direction engages with the mounting surface 15a of the first ring groove 15 of the first chain 12, and another part of the printed circuit board W in the width direction is the second chain 22. Mounting surface 25a of the second ring groove 25 of
Engage with.

As can be understood from FIGS. 8 and 9, the roller 43 of the clamp block 41 has the cam 6 at the starting end P1.
When it goes down along the taper surface 61, the clamp block 41 is automatically pushed down by the urging force accumulated in the coil spring 45. Accordingly, as can be understood from FIG. 6, the clamp surface 41b of the clamp block 41 and the first ring portion 15
The printed board W is sandwiched between the mounting surface 15a and the mounting surface 15a. That is, it is clamped.

Since the first chain 12 and the second chain 22 circulate in the direction of arrow X1 while the printed circuit board W is clamped in this way, they pass through the cleaning nozzle 55 and the air blow nozzle 56 in order. At this time, in order to remove the flux and the like remaining on the printed circuit board W, a cleaning liquid having a relatively high pressure is sprayed from the cleaning nozzle 55 onto the printed circuit board W, and the air having a relatively high pressure is discharged from the air blow nozzle 56 to the printed circuit board W. Be sprayed on. Therefore, the printed circuit board W may slip, and the conveyance speed of the printed circuit board W may become uneven. In this respect, since the printed circuit board W is forcibly clamped by the clamp means 4 in this embodiment, the printed circuit board W can be prevented from slipping even if the cleaning liquid and the impact of blowing air act on the printed circuit board W. Therefore, the conveyance speed of the printed circuit board W can be maintained constant.

When the printed circuit board W is conveyed to the terminal end portion P2 of the first and second conveyors 1 and 2, the roller 43 of the clamp block 41 passes through the tapered surface 71 of the cam 7 of the terminal end portion P2 and the horizontal plane 72. Climb to. As a result, the clamp block 41 of the clamp means 4 rises and automatically opens while elastically contracting the coil spring 45 as described above. Therefore, the clamp by the clamp means 4 is automatically released, and the printed circuit board W is automatically carried out from the terminal end P2.

By repeating the above-mentioned operation, a large number of printed circuit boards W are sequentially transported from the starting end portion P1 to the terminating end portion P2. (Effect) As described above, in this embodiment, the printed circuit board W is forcibly clamped by using the clamp block 41 of the clamp means 4, so that the printed circuit board W is impacted by the cleaning liquid and the air. Therefore, it is possible to prevent the printed circuit board W from slipping, so that the transport speed of the printed circuit board W can be kept constant. Therefore, the cleaning quality and draining quality of the printed circuit board W can be made constant.

Since many electronic components and printed wirings are mounted on the printed circuit board W, it is desirable to perform precision clamping so that the clamped part of the printed circuit board W is always constant. In this respect, in this embodiment, when the clamp block 41 of the clamp means 4 is automatically closed,
As can be understood from FIG. 8, since the inner side surface 41c of the clamp block 41 slides along the guide surface 63 of the cam 6,
The position of the clamp block 41 is regulated. In other words,
When the clamp block 41 starts clamping the printed circuit board W at the starting end portion P1, the distance L3 between the center line M of the cam 6 and the inner side surface 41c of the clamp block 41.
Is a fixed value. Therefore, it is useful to keep the clamped portion of the printed circuit board W constant at the time of starting the clamp, and always keep it constant. In this sense, it is advantageous for precision clamping of the printed circuit board W.

Further, in this embodiment, as can be understood from FIG. 10, when the first chain 12 and the second chain 22 travel in the chain passage 53, the restriction surface 50 of the main rail 50 is used.
a, the regulation surface 51a of the rail cover 51 is the first chain 1
It is possible to approach the outer peripheral surface of the second sleeve 122 and the outer peripheral surface of the sleeve 222 of the second chain 22 and regulate the rolling thereof. Therefore, rolling of the clamp block 41 at the time of starting the clamp can be restricted. Therefore, at the starting end P1 where the clamping of the apparatus is started, it is useful to keep the clamped portion of the printed circuit board W constant at all times. Also in this sense, it is advantageous for precision clamping of the printed circuit board W.

In addition, in this embodiment, as can be understood from FIG. 7, a bearing 46 is provided in the insertion hole 40 of the clamp block 41, and this bearing 46 is, as described above, the bearing of the clamp block 41 when moving up and down. Since the inclination can be prevented, the inclination of the clamp block 41 at the start of clamping can also be prevented. Also in this sense, it is advantageous for precision clamping of the printed circuit board W.

In this embodiment, as can be understood from FIG. 1, the cam 6 clamps and the cam 7 releases the clamp. Therefore, a drive source for starting the clamp by the clamp means 4 and a drive source for releasing the clamp of the clamp means 4 are not particularly required, which is useful for low equipment cost.

[0026]

According to the printed circuit board carrying device of the present invention, when the printed circuit board is carried, the clamping means clamps the printed circuit board. It is possible to avoid non-uniformity of the conveyance speed of the. Therefore, if it is applied to the printed board cleaning process, it is possible to avoid nonuniform cleaning quality.

[Brief description of drawings]

FIG. 1 is a schematic plan view of an apparatus according to an embodiment.

FIG. 2 is a plan view showing a starting end portion of a second transport section.

FIG. 3 is a perspective view showing a state in which the first chain and the second chain are being conveyed.

FIG. 4 is a side view showing a state where the printed circuit board is being washed.

FIG. 5 is a partially enlarged side view of the first chain.

FIG. 6 is an enlarged view showing a state where the printed circuit board is clamped.

FIG. 7 is a side view of the clamp means shown in a partial cross section.

FIG. 8 is a plan view showing a starting end portion of a first transport unit.

FIG. 9 is a side view showing a starting end portion of a first transport unit.

10 is a view taken along the line TT of FIG.

[Explanation of symbols]

In the figure, 1 is a first transport unit, 12 is a first chain, and 2 is a second chain.
A transport unit, 22 is a second chain, 4 is a clamping means, 41
Is a clamp block, 41b is a clamp surface, 45 is a coil spring, 6 is a cam, 61 is a tapered surface, and 62 is a horizontal plane.

Claims (1)

[Claims] 1. A first holder arranged at a predetermined interval,
A first endless portion erected endlessly between the first holders so as to be circulated, and a first endless portion provided on the first endless portion and engaging with a part of the printed circuit board for transporting the printed circuit board. A first carrier having an engaging portion, a second holder arranged at a predetermined distance, and an endless bridge between the second holders facing the first endless portion, and the first holder. A second endless portion that can be circulated in the same direction at a speed corresponding to that of the endless portion, and a second engagement that is provided in the second endless portion and that engages with another part of the printed circuit board for transporting the printed circuit board. At least one of the first endless section of the first transfer section and the second endless section of the second transfer section, and the first engaging section and the first transfer section. 2 Holds the printed circuit board that is engaged and engaged with the engaging part PCB conveying apparatus characterized by comprising a clamping means for securing Te.